HomeMy WebLinkAbout2022-10-05; Planning Commission; ; CUP2022-0010/SUP2022-0006 (DEV2022-0139) – CARLSBAD DESALINATION PLANT INTAKE AND DISCHARGE MODIFICATIONSItem No.
Application complete date: Sept. 22, 2022
P.C. AGENDA OF:Oct. 5, 2022 Project Planner: Scott Donnell
Project Engineer: David Rick
SUBJECT: CUP2022-0010/SUP2022-0006 (DEV2022-0139) – CARLSBAD DESALINATION PLANT
INTAKE AND DISCHARGE MODIFICATIONS – Request for approval of findings that the
proposed project is consistent with the previous addendum, as supplemented by the
technical memorandum, to Environmental Impact Report EIR 03-05; and approval of a
Conditional Use Permit and Special Use Permit to modify the intake and discharge
systems of the Carlsbad Desalination Plant. The project is at 4590 Carlsbad Boulevard
about 0.4 mile north of Cannon Road, within the boundaries of the former Encina Power
Station, and within Local Facilities Management Zone 1. The project is within the Agua
Hedionda Lagoon segment of the city’s Local Coastal Program, a segment in which the
California Coastal Commission has retained Coastal Development Permit authority.
I.RECOMMENDATION
That the Planning Commission ADOPT Planning Commission Resolution No. XXXX APPROVING findings
that the project is consistent with the previous addendum, as supplemented by the technical
memorandum, to Environmental Impact Report EIR 03-05 and APPROVING a Conditional Use Permit CUP
2022-0010 and Special Use Permit 2022-0006, based upon the findings and subject to the conditions
contained therein.
II.PROJECT DESCRIPTION AND BACKGROUND
The applicant, Poseidon Resources (Channelside) LP, proposes modifications to the intake and discharge
systems of the Claude “Bud” Lewis Carlsbad Desalination Plant (CDP). The proposed changes are
concentrated in a small portion of the former Encina Power Station and adjacent Agua Hedionda Lagoon.
The improvements are also west of the existing CDP building that is visible from Carlsbad Boulevard and
close to the plant’s entrance on the street.
The city approved the CDP, including certification of an environmental impact report (EIR) in June 2006,
and the plant began operation in 2015. The plant delivers nearly 50 million gallons per day of desalinated
water to San Diego County. The water produced is purchased by the San Diego County Water Authority
and distributed to the region. When it began operation, the CDP functioned in tandem with the Encina
Power Station and utilized its infrastructure; however, since the power station decommissioned on
December 11, 2018, the CDP has been transitioning to permanent stand-alone operations, which requires
the phased construction of new facilities to permit independent operation.
The purpose of the proposed project is to finalize the transition to permanent stand-alone operations by
installing modifications to the existing intake system and associated outfall system in and near the Agua
Hedionda Lagoon Outer Basin (the portion of the lagoon closest to Carlsbad Boulevard). The project would
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include installation of an approximately 160-feet by 32-feet partially submerged intake system in the
Lagoon that extends approximately 25-feet above water, an above water deck approximately 200-feet
long and 30-feet wide, and a debris return area between the discharge pond and intake system.
In addition, the proposed project includes the installation of a prefabricated 500-square foot electrical
building, the demolition, relocation, and replacement of the marine research shed, replacement and
relocation of a boat ramp, installation of a floating debris boom in front of the intake screens, and
abandonment-in-place and demolition of the existing Encina Power Station intake screens and channels,
discharge channel, and existing 72-inch feeder pipeline and vault and the constructions of a new 72-inch
feeder pipeline and vault. Project construction activities, anticipated to begin this year and last
approximately 12 months, trigger the need for replacement parking for the adjacent Carlsbad Aquafarm.
Accordingly, as part of the project, two temporary driveways and a parking lot are proposed along
Carlsbad Blvd. just to the north of the Aquafarm.
Furthermore, the modifications are proposed to also comply with the California Ocean Plan provisions for
seawater desalination facilities. The Ocean Plan includes requirements to ensure the construction and
operation of seawater desalination facilities minimize intake and mortality of all forms of marine life.
Zoning, Precise Development Plan, and project permitting
Proposed improvements are in two different zoning designations: Public Utilities (P-U) and Open Space
(OS). Generally, the OS Zone applies to those improvements in the lagoon and the P-U Zone applies to
improvements on land. However, the boundaries between the zones follow property lines, which do not
necessarily follow the lagoon boundaries. This means some improvements proposed are split by zoning
designations, such that portions are in both the P-U and OS zones. Project plans (exhibits 6 and 7) use
color coding to help show where the different zones occur in relation to the improvements.
While project improvements in the Open Space Zone require either a Conditional Use Permit or are
permitted as an accessory use, improvements planned in the P-U Zone are subject to the Encina Power
Station Precise Development Plan (PDP). The PDP is a permit granted as part of the city’s original CDP
approval in 2006 and applies to all the former Encina Power Station property stretching from Carlsbad
Boulevard to Interstate 5. For the most part, the PDP does not include any part of the lagoon. The PDP
allows administrative approval of improvements that can be found consistent with the original approval.
Therefore, improvements identified in the P-U Zone, as shown on project exhibits and with one exception,
are subject to staff approval. These improvements include demolition of various infrastructure and
construction of minor improvements, such as the 500-square foot electrical building.
The exception noted to the administrative approval applies to project improvements in the P-U Zone but
also within or directly alongside the Agua Hedionda Lagoon and within a Special Flood Hazard Area. This
applies only to a small part of the project footprint. As presented in the “Analysis” section below,
improvements within property so designated are subject to a Special Use Permit approved by the Planning
Commission serving as the Floodplain Administrator.
Temporary Fire Station 7
In 2021, the city approved a temporary fire station to be constructed at the former Encina Power Station,
approximately 400-feet south of the proposed project where a warehouse and administration building
were previously located. Subsequently, the California Coastal Commission approved a Coastal
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Development Permit for the facility. The city has signed a 6-year lease with the property owner, NRG Inc.,
to enable its construction and operation, and the station is anticipated to be functional early next year.
Both the station and proposed modifications are anticipated to be under construction at the same time.
The station is planned to be operational while construction on the modifications would continue. The
existing Carlsbad Blvd. entrance will provide construction access as well as fire station operational access.
Both the applicant and city staff have communicated and coordinated regarding construction schedules
and temporary fire station operations. A recommended condition of approval requires fire station access
to the Carlsbad Blvd. entrance at all times, including during construction. Also, Exhibit 5 is a technical
memorandum that provides a supplemental environmental analysis of the project in light of the
temporary station.
Table A below includes the General Plan designations, zoning and current land uses of the project site
and surrounding properties.
TABLE A – SITE AND SURROUNDING LAND USE
Location General Plan Designation Zoning Current Land Use
Site
VC/OS (Visitor
Commercial/Open Space) and
OS (Open Space)
P-U (Public Utilities)
and OS (Open Space)
Desalination plant
infrastructure, aquaculture
operations (on land and in
the lagoon), parking areas
North OS P-U Lagoon
South VC/OS P-U Vacant (former Encina
Power Station)
East
VC/OS P-U Parking area, vacant
(former Encina Power
Station); Claude “Bud”
Lewis Carlsbad
Desalination Plant
West OS OS Carlsbad Blvd., beach
III. ANALYSIS
The project is subject to the following regulations and requirements:
A. General Plan
B. Open Space Zone and Conditional Use Permit (Carlsbad Municipal Code (CMC) chapters
21.33 and 21.42)
C. Special Use Permit (CMC Chapter 21.110, Floodplain Management Regulations)
D. Agua Hedionda Land Use Plan
E. Growth Management (CMC Chapter 21.90)
The recommendation for approval of this project was developed by analyzing the project’s consistency
with the applicable city regulations and policies. The project’s compliance with each of the above
regulations is summarized below and detailed in the attached Planning Commission resolution.
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A. General Plan
TABLE B – GENERAL PLAN CONSISTENCY
ELEMENT USE, CLASSIFICATION, GOAL,
OBJECTIVE, OR PROGRAM PROPOSED USES & IMPROVEMENTS COMPLY?
Land Use &
Community
Design
Goal 2-G.21: Ensure that adequate
public facilities and services are
provided in a timely manner to
preserve the quality of life of
residents.
The project facilitates the continued
supply of drinking water to the San
Diego region, including Carlsbad, and
is part of a use the General Plan
recognizes will continue upon
redevelopment of the former Encina
Power Station.
Yes
Policy 2-P.83 (second bullet): The
desalination plant shall remain on
approximately 11 acres (six acres
for the desalination plant and
approximately five acres of non-
exclusive easements) west of the
railroad tracks
Open Space,
Conservation
and
Recreation
Goal 4-G.1 Develop a balanced and
integrated open space system
reflecting a variety of
considerations—resource
conservation, production of
resources, recreation, and
aesthetic and community
identity—and ensuring synergies
between various open space
components and compatibility with
land use planning.
Agua Hedionda Lagoon is designated
open space and provides both
recreation and the production of
resources; the lagoon provides
source water for the CDP, which the
project would help facilitate in an
environmentally sensitive manner.
Yes
Yes Goal 4-G.3: Protect
environmentally sensitive lands,
wildlife habitats, and rare,
threatened or endangered plants
and animal communities.
The project would modify the CDP’s
screening system and other related
infrastructure to allow conformity to
the state’s Ocean Plan requirements
for seawater desalination facilities.
The Ocean Plan includes
requirements to ensure the
construction and operation of
seawater desalination facilities
minimize intake and mortality of all
forms of marine life.
Sustainability Goal 9-G.4: Reduce the city’s
reliance on imported water.
The project will facilitate the ability
of the CDP to continue to provide a
local and drought proof water
supply.
Yes
B. Open Space Zone and Conditional Use Permit (CMC chapters 21.33 and 21.42)
The portion of the project in the Open Space Zone (generally, improvements in the lagoon and most of
the temporary parking lot) are subject to the land use regulations in the Zoning Ordinance, Title 21 of the
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CMC. In the Open Space Zone, project improvements other than the parking lot are categorized as
““public/quasi-public building and facilities and accessory buildings/facilities” and subject to a Level 2
Conditional Use Permit, approved by the Planning Commission with the potential for appeal to the City
Council. The parking lot is identified as a permitted accessory use.
The Open Space Zone contains only one applicable development standard, which is that buildings and
structures shall not exceed twenty-five feet in height unless otherwise approved by a minor conditional
use permit issued by the city planner. The proposed partially submerged intake system and adjacent deck
access extends approximately 25-feet above the lagoon surface.
To approve the required conditional use permit, CMC Chapter 21.42 requires the Planning Commission to
make four findings. The four findings and brief explanations of how they can be made are provided below.
1. Finding: That the requested use is necessary or desirable for the development of the community
and is in harmony with the various elements and objectives of the general plan, including, if
applicable, the certified local coastal program, specific plan or master plan. Response: The project
facilitates the transition to a stand-alone operation of the Claude “Bud” Lewis Carlsbad
Desalination Plant (CDP) in light of the closure and demolition of the Encina Power Station and
will allow the CDP to continue to provide 10% of San Diego County’s water supply In addition,
while the General Plan anticipates redevelopment of the power plant property with visitor-
commercial uses and community accessible open space, it also specifically recognizes the
desalination plant and related infrastructure will remain.
2. Finding: That the requested use is not detrimental to existing uses or to uses specifically permitted
in the zone in which the proposed use is to be located. Response: Project improvements are
adequately screened from Carlsbad Boulevard and other public viewpoints due to topography,
intervening structures, landscaping, and distance.
3. Finding: That the site for the proposed conditional use is adequate in size and shape to
accommodate the yards, setbacks, walls, fences, parking, loading facilities, buffer areas,
landscaping and other development features prescribed in this code and required by the City
Planner, planning commission or City Council, in order to integrate the use with other uses in the
neighborhood. Response: The project complies with the Encina Power Station Precise
Development Plan, which prescribes the development standards for project features in the P-U
Zone, and also complies with the standards of the OS Zone, which applies to most project
improvements in the Agua Hedionda Lagoon and to the majority of the Fish Farm temporary
parking lot.
4. Finding: That the street system serving the proposed use is adequate to properly handle all traffic
generated by the proposed use. Response: There will be no increase in traffic compared to the
approved project (the CDP).
C. Special Use Permit (CMC Chapter 21.110)
A special use permit issued by the Planning Commission (the “floodplain administrator” per CMC Section
21.110.140) is required before construction or development begins within any area of special flood
hazards. The project proposes improvements in a Special Flood Hazard Area, which is specifically identified
as Zone AE. According to FEMA (Federal Emergency Management Agency), the Special Flood Hazard Area
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is also known as the “base flood” or “100-year” flood and Zone AE simply means that base flood elevations
have been determined.
Project plans map the boundary of Zone AE, which encompasses improvements proposed within the
lagoon. To grant a special use permit to allow the proposed improvements, the Planning Commission
needs to make eight findings. These findings require demonstration that, among others, the site is
reasonably safe from flooding, that the project does not create a hazard for adjacent or upstream or
downstream properties or structures, and that the project does not reduce the ability of the site to pass
or handle a 100-year flood.
In response, staff notes proposed improvements are concentrated in a small portion of Agua Hedionda
Lagoon (an area fewer than two acres of a more than 300-acre lagoon), are designed to continue to allow
water to pass under and through proposed improvements and would not significantly impede or redirect
flood flows or expose people to significant risk of loss, injury or death involving flooding. Further, the
applicant’s continued use of Agua Hedionda Lagoon for desalination plant source water requires periodic
and ongoing maintenance dredging of the lagoon, which increases its physical capacity and, therefore, its
ability to accommodate floodwaters.
D. Agua Hedionda Land Use Plan
On Sept. 8, 2022, the California Coastal Commission approved the project with conditions under Coastal
Development Permit application 9-22-0535. The Agua Hedionda Lagoon, desalination plant and former
Encina Power Station and the project are in the Agua Hedionda segment of the city’s Local Coastal
Program, a “deferred certification” area of the Coastal Zone. In this segment, it is the Coastal Commission,
not the city, that issues the Coastal Development Permit and thus determines consistency with relevant
provisions of the Coastal Act.
Though the Coastal Commission retains permit authority, the Agua Hedionda Land Use Plan is an
incorporated part of the city’s Local Coastal Program and provides policies and standards for the deferred
certification area. The proposal to modify the desalination plant’s intake and discharge and add a
temporary parking area comply with Land Use Plan provisions on general land use, building height, and
protection of water quality. Further, the project does not conflict with plan standards regarding public
access, views, or recreational use of the lagoon.
E. Growth Management (CMC Chapter 21.90) – Zone 1 Local Facilities Management Plan
The proposed project is located within Local Facilities Management Zone 1 in the city’s Northwest
Quadrant. The impacts on public facilities created by the project, and its compliance with the adopted
performance standards, are summarized in Table “C” below:
TABLE C – LFMP ZONE 1 SUMMARY
STANDARD IMPACTS COMPLIANCE
W/STANDARDS
City Administration No Impact; does not generate population Yes
Library No Impact; does not generate population Yes
Wastewater Treatment No Impact; does not generate population Yes
Parks No impact; does not generate population Yes
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Drainage Negligible impact due to limited ground
disturbance. Project will adhere as
necessary to the city’s Grading and
Drainage Ordinances and Stormwater
Regulations and implement best
management practices (e.g., erosion
control) to avoid increased urban run-off,
pollutants, and soil erosion.
Yes
Circulation No increase in traffic compared to
approved project Yes
Fire Station No. 1; adjacent to approved Fire
Station 7 Yes
Open Space No impact; does not generate population Yes
Schools No impact; does not generate population Yes
Sewer No Impact; does not generate a need for
sewer Yes
Water No impact; does not generate a demand
for water. Allows continued operation of
desalination plant.
Yes
IV. ENVIRONMENTAL REVIEW
On June 13, 2006, the City of Carlsbad certified a Final Environmental Impact Report (EIR 03-05) for the
CDP. The full contents of EIR 03-05 are available on the Planning Division’s “Agendas, Minutes & Notices”
webpage at https://www.carlsbadca.gov/departments/community-development/planning/agendas-
minutes-notices.
Subsequently over the next several years, the CDP was modified, and the environmental impacts of these
minor changes were analyzed in five addenda to EIR 03-05. As described in CEQA Guidelines Section
15164(a), “the lead agency...shall prepare an addendum to a previously certified EIR if some changes or
additions are necessary but none of the conditions described in Section 15162 calling for the preparation
of a subsequent EIR or negative declaration have occurred.” The addenda were prepared by either the
City of Carlsbad or the Water Authority.
In 2016, the Water Authority adopted a supplement to the Final EIR to evaluate changes to the CDP’s
intake and discharge system that would facilitate the closure of the Encina Power Station and the CDP’s
transition to permanent stand-alone operations following the power station’s 2018 decommissioning.
After adoption of the Supplemental EIR, the San Diego Regional Water Quality Control Board identified
design modifications to the CDP’s intake and discharge system that would further reduce biological
impacts. The Water Authority analyzed these changes in a Sixth Addendum, prepared in February 2019.
In 2021, the applicant proposed further modifications that were analyzed in a Seventh Addendum
prepared and approved by the Water Authority in May 2022. These further modifications constitute the
proposed project. However, because the Seventh Addendum did not include analysis of the project and
the city’s temporary Fire Station 7, the applicant prepared a technical memorandum to supplement the
addendum and provide the additional analysis.
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Pursuant to CEQA and its implementing regulations (the State CEQA Guidelines), a Responsible Agency
complies with CEQA by considering the environmental document prepared by the Lead Agency and by
reaching its own conclusions on whether and how to approve the project involved. In this instant, the
Water Authority is acting as the Lead Agency, as the public agency with the principal responsibility for
approving and implementing the project. The City of Carlsbad is the public agency (Responsible Agency),
which has discretionary approval power over the portion(s) of the project under its jurisdiction.
On the basis of the analysis contained in the draft resolution approving the project (Exhibit 1), it can be
found that there are no substantial changes proposed in the project and there are no substantial changes
in the circumstances under which the project will be undertaken that will require major revisions to the
previous EIR due to the involvement of significant new environmental effects or a substantial increase in
the severity of previously identified significant effects. As demonstrated in the attached addendum and
supplement (exhibits 4 and 5), none of the requirements in CEQA Guidelines sections 15162 and 15163
for a subsequent EIR have been triggered. Therefore, the revised project is within the scope of the EIR
03-05 and use of the Seventh Addendum prepared and approved by the Water Authority to document
the project changes, as supplemented by the technical memorandum, is appropriate. Upon approval of
the proposed project, a Notice of Decision will be filed with the County Clerk and State Clearinghouse.
V. DEVELOPMENT PROJECT PUBLIC INVOLVEMENT POLICY
The proposed project is subject to the Early Public Notice and the Enhanced Stakeholder Outreach
processes outlined in City Council Policy No. 84 – Development Project Public Involvement Policy. The
policy requires applicants of certain development projects to provide an opportunity for and consider
input from interested and affected stakeholders prior to project consideration by the Planning
Commission or City Council. Because the project is a development proposal requiring a conditional use
permit, it is subject to the policy.
On Aug. 18, 2022, the applicant activated a project website (https://www.carlsbaddesal.com/intake-and-
outfall.html) enabling people to learn more about and submit comments and questions on the project.
Information on the website includes a project description, construction timeframe, city permits sought
and a location map and proposed plans. The website also details the project permits are subject to
Planning Commission approval at a noticed public hearing.
Details regarding how to access the website were provided in the notice of permit application and
enhanced stakeholder outreach mailed to neighbors within 600 feet of the project site. Because the
project is located on very large properties that encompass the outer lagoon basin and the former power
station property west of the railroad tracks, the 600-foot noticing requirement was taken from the
boundaries of these properties to ensure residents north of the lagoon and near the vicinity of Carlsbad
Boulevard and Cannon Road to the south received notification. Approximately 500 notices were mailed.
As of Sept. 27, 2022, only one comment has been received via the public input and comment form on the
website. The question received concerned noise and the applicant provided a response to the commentor.
Policy No. 84 identifies various methods to provide interested and affected community members a
meaningful opportunity to provide input, including through a website that enables the public to learn
about a project and understand how to provide input. Accordingly, applicant outreach conducted as
described satisfies policy requirements.
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EXHIBITS:
1. Planning Commission Resolution
2. Location map
3. Disclosure statement
4. Seventh Addendum to EIR 03-05 prepared by Dudek and prepared for the San Diego County Water
Authority, May 2022
5. Technical memorandum (Focused Analysis for Alternative 22 and City of Carlsbad Fire Station
Project) prepared by Dudek, September 2022
6. Reduced exhibits
7. Full size exhibits “A” - “M” dated October 5, 2022
PLANNING COMMISSION RESOLUTION NO. 7464
A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF
CARLSBAD, CALIFORNIA, APPROVING FINDINGS THAT THE PROPOSED
PROJECT IS CONSISTENT WITH THE PREVIOUS ADDEDNUM, AS
SUPPLEMENTED BY THE DUDEK SEPTEMBER 2022 MEMORANDUM, TO
FINAL ENVIRONMENTAL IMPACT REPORT EIR 03 -05, AND APPROVING A
CONDITIONAL USE PERMIT AND SPECIAL USE PERMIT TO MODIFY THE
CARLSBAD DESALINATION PLANT INTAKE AND DISCHARGE SYSTEMS ON
PROPERTY AT 4590 CARLSBAD ON THE GROUNDS OF THE FORMER
ENCINA POWER STATION AND IN THE ADJACENT AGUA HEDIONDA
LAGOON, ALL IN LOCAL FACILITIES MANAGEMENT ZONE 1.
CASE NAME: CARLSBAD DESALINATION PLANT INTAKE AND
DISCHARGE MODIFICATIONS
CASE NO.: CUP 2022-0010/SUP 2022-0006 (DEV 2022-013 9)
WHEREAS, Poseidon Resources (Channelside) LP, "Developer," has filed a verified
application with the City of Carlsbad regarding property owned by Cabrillo Power I LLC, "Owner,"
described as
That portion of Lot "H" of Rancho Agua Hedionda in the City of Carlsbad,
County of San Diego, State of California, according to Partition Map
thereof No. 823, filed in the Office of the County Recorder of San Diego
County, November 16, 1896, and identified by Assessor's Parcel
Numbers 210-010-45 and 210-010-49
{"the Property"); and
WHEREAS, said verified application constitutes a request for a Conditional Use Permit and
Special Use Permit as shown on Exhibit{s) "A" -"M" dated October 5, 2022, on file in the Planning
Division, CUP 2022-0010/SUP 2022-0006 -CARLSBAD DESALINATION PLANT INTAKE AND DISCHARGE
MODIFICATIONS, as provided by Chapters 21.42 and 21.110 of the Carlsbad Municipal Code; and
WHEREAS, pursuant to the California Environmental Quality Act {CEQA, Public Resources
Code section 21000 et. seq.) and its implementing regulations {the State CEQA Guidelines ), Article 14 of
the California Code of Regulations section 15000 et. seq., the City of Carlsbad certified a Final
Environmental Impact Report {EIR 03-05) {State Clearinghouse No. 2004041081) on June 13, 2006 and
approved the Precise Development Plan {PDP 00-02) and Carlsbad Desalination Project {"CDP") project.
The Final EIR analyzed an annual average 50 million gallon per day seawater desalination plant co -located
EXHIBIT 1
with the Encina Power Station and offsite water conveyance facilities located in the cities of Carlsbad,
Oceanside, and Vista . The CDP was subsequently modified, and the environmental impacts of these minor
changes were analyzed in the First through Fifth Addenda; and
WHEREAS, On August 25, 2016, the San Diego County Water Authority ("Water
Authority") adopted a supplement to the Final EIR (State Clearinghouse No. 2015091060) ("Supplemental
EIR") to evaluate changes to the CDP's intake and discharge system ("2016 Modifications") that would
facilitate the closure of the Encina Power Station and the CDP's transition to permanent stand-alone
operations in response to the Amendment to the Water Quality Control Plan for Ocean Waters of the
California (the "Desalination Amendment"). After the Water Authority approved the Supplemental EIR
and the 2016 Modifications, the San Diego Regional Water Quality Control Board identified design
modifications to the CDP's intake and discharge system that would further reduce biological impacts. The
Water Authority analyzed these changes in the Sixth Addendum, prepared in February 2019. In 2021,
Poseidon proposed further modifications to the intake design to move the new intake structure closer to
the shore, eliminate the intake pipelines, and use dual flow screens for debris removal and screen
maintenance from the shore. The Water Authority's Seventh Addendum, prepared in May 2022 and
approved by the Water Authority as Lead Agency under the California Environmental Quality Act (CEQA),
analyzed these incremental changes, and is supplemented by Dudek's September 20, 2022 technical
memora_ndum ("Dudek September 2022 Memorandum") assessing potential environmental impacts,
including cumulative impacts, of the CDP and the city's temporary Fire Station 7 approved on the former
Encina Power Station grounds and approximately 400-feet south of the project; and
WHEREAS, in its consideration of the project, the City of Carlsbad is a Responsible Agency
under CEQA and may use an addendum prepared by a Lead Agency as described in CEQA Guidelines
sections 15050 and 15164; and
PC RESO NO. 7464 -2-
WHEREAS, sections 15162 through 15164 set the criteria for determining the appropriate
additional environmental documentation, if any, to be completed when there is a previously certified EIR
or addendum covering the project for which a subsequent discretionary action is required; and
WHEREAS, the Planning Commission did, on October 5, 2022, hold a duly noticed public
hearing as prescribed by law to consider said request; and
WHEREAS, at said public hearing, upon hearing and considering all testimony and
arguments, if any, of all persons desiring to be heard, said Commission considered all factors relating to
the CUP.
NOW, THEREFORE, BE IT HEREBY RESOLVED by the Planning Commission of the City of Carlsbad as follows:
A) That the foregoing recitations are true and correct.
B) That based on the evidence presented at the public hearing, the Commission APPROVES
findings that the project is consistent with the previous addendum to Environmental
Impact Report EIR 03-05, as supplemented by the Dudek September 2022 memorandum,
and APPROVES CUP 2022-0010/SUP 2022-0006 -CARLSBAD DESALINATION PLANT
INTAKE AND DISCHARGE MODIFICATIONS, based on the following findings and subject
to the following conditions:
Findings:
Environmental (CEQA and CMC Chapter 19.04)
1. An Addendum to the EIR has been prepared by the Water Authority, acting as the Lead Agency,
in compliance with all requirements contained in CEQA and CEQA Guidelines.
2. In determining whether the proposed project has a significant effect on the environment, the
Planning Commission is able to base its decision on substantial evidence and has complied with
Public Resources Code section 21082.2 and CEQA Guidelines section 15091(b). The Planning
Commission has reviewed the scope of the project and it has been determined that none of the
requirements in CEQA Guidelines sections 1512 or 15163 calling for the preparation of a
subsequent or supplemental EIR have been triggered. The Final EIR and Addendum, as
supplemented by the Dudek September 2022 memorandum, have fully analyzed and mitigated,
where feasible, in compliance with CEQA, all potentially significant environmental impacts, if any,
that would result from the project modifications, that the impacts to the environment as a result
of the modifications are consistent with and would not create substantial new or increased
impacts beyond those th~t were evaluated in the EIR and Addendum. Mitigation measures were ·
developed to reduce potential impacts. Mitigation measures are incorporated as part of the
PC RESO NO. 7464 -3 -
project's construction drawings or conditions of approval to reduce impacts to a level less than
significant.
3. The Planning Commission hereby finds that after considering the public comments.received and
the evidence and testimony before it, that the Final EIR and Addendum, as supplemented by the
Dudek September 2022 memorandum, reflect the independent judgement of the city as the
Responsible Agency; and that the Final EIR and Addendum, as supplemented by the Dudek
September 2022 memorandum, are adequate and provide good-faith disclosure of available
information on the project and all reasonable and feasible alternatives thereto. The Final EIR and
Addendum, as supplemented by the Dudek September 2022 memorandum, have eliminated or
substantially lessened all significant effects on the environment where feasible as shown in
findings under Section 15091.
3. The custodian of the documents and other materials which constitute the record of proceedings
upon which this decision is based is the Office of the City Clerk of the City of Carlsbad, 1200 Village
Drive, Carlsbad, CA 92008.
Conditional Use Permit CUP 2022-0010
1. That the requested use is necessary or desirable for the development of the community, and is in
harmony with the various elements and objectives of the general plan, including, if applicable, the
certified local coastal program, specific plan or master plan, in that the project facilitates the
transition to a stand-alone operation of the Claude "Bud" Lewis Carlsbad Desalination Plant
(CDP) in light of the decommissioning of the Encina Power Station. The project also enables
continued use of parts of the power plant's intake and discharge structures but would modify
the screening system and other related infrastructure to minimize intake and mortality of all
forms of marine life and thus allow conformity to the state's Ocean Plan requirements for
seawater desalination facilities, which complies with Goal 4-G.3 of the General Plan Open
Space, Conservation and Recreation Element to "protect environmentally sensitive lands,
wildlife habitats, and rare, threatened or endangered plants and animal communities." Use of
water from Agua Hedionda Lagoon in an environmentally sensitive manner also helps achieve
consistency with Goal 4-G.1 of the same element, "develop a balanced and integrated open
space system reflecting a variety of considerations-resource conservation, production of
resources, recreation, and aesthetic and community identity-and ensuring synergies between
various open space components and compatibility with land use planning."
Further, the CDP has created a local water supply that is not subject to the variations of drought
or political and legal constraints on water supplies. As drought conditions continue to worsen
throughout the state and much of the Southwest, the CDP's importance in providing a secure,
climate-resilient water supply increases. The project will allow the CDP to continue to provide
10% of San Diego County's water supply and provide water supply redundancy for the county,
offsetting the potential supply disruptions of imported water and continuing to strengthen
security and reliability of water supply for residents and businesses throughout the county; this
is supportive of Goal 2-G.21 of the Land Use and Community Design Element, "ensure that
adequate public facilities and services are provided in a timely manner to preserve the quality
of life of residents;" and Goal 9-G.4 of the Sustainability Element, "reduce the city's reliance on
imported water." Also, as noted in the San Diego County Water Authority's 2020 Urban Water
Management Plan ("UWMP"), "[a] growing share of local supply comes from recycled water,
PC RESO NO. 7464 -4-
groundwater recovery, potable reuse, and seawater desalination projects. Yield from these
projects is considered drought-resilient since the projects are primarily independent of
precipitation."
In addition, while the General Plan anticipates redevelopment of the power plant property with
visitor-commercial uses and community accessible open space, it also specifically recognizes the
desalination plant and related infrastructure will remain. As part of the General Plan wording
regarding redevelopment of the power plant, Land Use and Community Design Element Policy
2-P.83 states (in part), "The desalination plant shall remain on approximately 11 acres (six acres
for the desalination plant and approximately five acres of non-exclusive easements) west of the
railroad tracks."
Finally, on Sept. 8, 2022, the California Coastal Commission approved with conditions coastal
development permit application 9-22-0535. As the Agua Hedionda Lagoon and former Encina
Power Station are in a "deferred certification" area of the Coastal Zone, it is the Coastal
Commission, not the city, that issues the coastal development permit and thus determines
consistency with relevant provisions of the Coastal Act. Though the Coastal Commission retains
permit authority, the Agua Hedionda Land Use Plan is an incorporated part of the city's Local
Coastal Program and provides generally policy level regulation for the deferred certification
area. The proposal to modify the desalination plant's intake and discharge conforms to Land
Use Plan provisions on general land use, building height, and protection of water quality.
Further, the project does not conflict with plan standards regarding public access, views, or
recreational use of the lagoon.
2. That the requested use is not detrimental to existing uses or to uses specifically permitted in the
zone in which the proposed use is to be located in that project improvements are adequately
screened from Carlsbad Boulevard and other public viewpoints due to topography, intervening
structures, landscaping, and distance. Project features, for example, are more than 1,500 to
2,400 feet from the nearest residence, which is along Garfield Street. Additionally, the project
is consistent with the type of uses permitted in the Public Utilities Zone, which identifies
processing, using and storage of domestic water supplies as a permitted use, and modifies and
supplements existing features of the Claude "Bud" Lewis Carlsbad Desalination Plant. Further,
project features in the Open Space Zone are tucked close to the southernmost extent of the
outer portion of Agua Hedionda and appear as a reasonable extension of existing desalination
equipment in this area; this area is not publicly accessible and has long been used for industrial
purposes and aquaculture. Finally, the temporary parking lot to serve the Fish Farm is situated
below the adjacent grade of Carlsbad Boulevard, which will help screen the view of parked cars
from the street.
3. That the site for the proposed conditional use is adequate in size and shape to accommodate the
yards, setbacks, walls, fences, parking, loading facilities, buffer areas, landscaping and other
development features prescribed in this code and required by the City Planner, planning
commission or City Council, in order to integrate the use with other uses in the neighborhood, in
that the project complies with the Encina Power Station Precise Development Plan, which
prescribes the development standards for project features in the Public Utilities (P-U) Zone, and
the standards of the Open Space (O-S) Zone, which applies to the majority of improvements in
PC RESO NO. 7464 -5-
the Agua Hedionda Lagoon and to the majority of the Fish Farm temporary driveways and
parking lot.
4. That the street system serving the proposed use is adequate to properly handle all traffic
generated by the proposed use, in that the project is served by Carlsbad Boulevard, a street
providing regional access and designated by the General Plan as a "Coastal Street" with the
capacity to support a variety of vehicles. Further, the project would not increase permanent staffing
at the Carlsbad Desalination Plant that would create additional operational vehicle trips.
Special Use Permit SUP 2022-0006
5. The site is reasonably safe from flooding in that improvements are concentrated in a small
portion of Agua Hedionda Lagoon, represent minimal disturbance of the lagoon, and ·are
designed to continue to allow water to pass under and through proposed improvements and
would not have sigi:,ificant impacts in terms of impeding or redirecting flood flows or exposing
people to significant risk of loss, injury or death involving flooding.
6. The project as proposed has been designed to minimize the flood hazard to the habitable portions
of the structure in that the project contains no habitable structures.
7. The proposed project does not create a hazard for adjacent or upstream properties or structures
in that improvements are concentrated in a small portion of Agua Hedionda Lagoon, represent
minimal disturbance of the lagoon, and are designed to continue to allow water to pass under
and through proposed improvements.
8. The proposed project does not create any additional hazard or cause adverse impacts to
downstream properties or structures in that the project improvements are concentrated in a
small portion of Agua Hedionda Lagoon, represent minimal disturbance of the lagoon, and are
designed to continue to allow water to pass under and through proposed improvements and
would not have significant impacts in terms of impeding or redirecting flood flows or exposing
people to significant risk of loss, injury or death involving flooding.
9. The proposed project does not reduce the ability of the site to pass or handle a base flood of 100-
year frequency in that the project improvements are concentrated in a small portion of Agua
Hedionda Lagoon, represent minimal disturbance of the lagoon, and are designed to continue
to allow water to pass under and through proposed improvements. Further, Developer's
continued use of Agua Hedionda Lagoon for CDP source water requires periodic and ongoing
maintenance dredging of the lagoon, which increases the physical capacity of the lagoon and,
therefore, its ability to accommodate floodwaters.
10. The proposed project taken together with all the other known, proposed, and anticipated projects
will not increase the water surface elevation of the base flood more than one foot at any point in
that project improvements within the floodplain would impact an area fewer than two acres, a
very small portion of the more than 300-acre Agua Hedionda Lagoon.
11. All other required state and federal permits have been obtained in that Developer has obtained
a Coastal Development Permit from the California Coastal Commission and is conditioned to
comply with and subject to all permits and approvals as necessary from various state and
PC RESO NO. 7464 -6-
federal agencies, including the San Diego Regional Water Quality Control Board, U.S. Army
Corps of Engineers, U.S fish and Wildlife Service, and National Marine Fisheries Services.
Conditions:
NOTE: Unless otherwise specified herein, all conditions shall be satisfied prior to issuance of grading or
building permits for the desalination plant modifications, whichever occurs first.
1. If any of the following conditions fail to occur, or if they are, by their terms, to be implemented
and maintained over time, if any of such conditions fail to be so implemented and maintained
according to their terms, the city shall have the right to revoke or modify all approvals herein
granted; deny or further condition issuance of all future building permits; deny, revoke, or further
condition all certificates of occupancy issued under the authority of approvals herein granted;
record a notice of violation on the property title; institute and prosecute litigation to compel their
compliance with said conditions or seek damages for their violation. No vested rights are gained
by Developer or a successor in interest by the city's approval of this Conditional Use Permit or
Special Use Permit.
2. Staff is authorized and directed to make, or require the Developer to make, all corrections and
modifications to the Conditional Use Permit and Special Use Permit documents, as necessary to
make them internally consistent and in conformity with the final action on the project.
Development shall occur substantially as shown on the approved Exhibits. Any proposed
development, different from this approval, shall require an amendment to this approval.
3. Developer shall comply with all applicable provisions of federal, state, and local laws and
regulations in effect at the time of building permit issuance.
4. As a condition to approval of the Conditional Use Permit and Special Use Permit, the Developer
shall obtain a valid Coastal Development Permit from the California Coastal Commission or its
successor in interest that substantially conforms to this approval. A signed copy of the Coastal
Development Permit must be submitted to the City Planner. If the approval is substantially
different, amendments to the Conditional Use Permit and Special Use Permit shall be required.
5. If any condition for construction of any public improvements or facilities, or the payment of any
fees in-lieu thereof, imposed by this approval or imposed by law on this Project are challenged,
this approval shall be suspended as provided in Government Code Section 66020. If any such
condition is determined to be invalid, this approval shall be invalid unless the City Council
determines that the project without the condition complies with all requirements of law.
6. Developer/Operator shall and does hereby agree to indemnify, protect, defend, and hold
harmless the City of Carlsbad, its Council members, officers, employees, agents, and
representatives, from and against any and all liabilities, losses, damages, demands, claims and
costs, including court costs and attorney's fees incurred by the city arising, directly or indirectly,
from (a) city's approval and issuance of this Conditional Use Permit and Special Use Permit, (b)
city's approval or issuance of any permit or action, whether discretionary or nondiscretionary, in
connection with the use contemplated herein, and (c) Developer/Operator's installation and
operation of the facility permitted hereby, including without limitation, any and all liabilities
PC RESO NO. 7464 -7-
arising from the emission by the facility of electromagnetic fields or other energy waves or
emissions. This obligation survives until all legal proceedings have been concluded and continues
even if the city's approval is not validated.
7. . Prior to submittal of the building plans, improvement plans, grading plans, or final map, whichever
occurs first, developer shall submit to the City Planner, a 24" x 36" copy of the {Site Plan or other),
conceptual grading plan and preliminary utility plan reflecting the conditions approved by the final
decision-making body. The copy shall be submitted to the City Planner, reviewed and, if found
acceptable, signed by the city's project planner and project engineer. If no changes were required,
the approved exhibits shall fulfill this condition .
8. Prior to the issuance of a building permit, the Developer shall provide proof to the Building
Division from the Carlsbad Unified School District that this project has satisfied its obligation to
provide school facilities.
9. This project shall comply with all conditions and mitigation measures which are required as part
of the Zone 1 Local Facilities Management Plan and any amendments made to that Plan prior to
the issuance of building permits.
10. This approval shall become null and void if building permits are not issued fo r this project within
24 months from the date of project approval.
11. Building permits will not be issued for this project unless the local agency providing water and
sewer services to the project provides written certification to the city that adequate water service
and sewer facilities, respectively, are available to the project at the time of the application for the
building permit, and that water and sewer capacity and facilities will continue to be available until
the time of occupancy.
12. Developer shall pay the Citywide Public Facilities Fee imposed by City Council Policy #17, the
License Tax on new construction imposed by Carlsbad Municipal Code Section 5.09.030, and CFD
#1 special tax {if applicable), subject to any credits authorized by Carlsbad Municipal Code Section
5.09.040. Developer shall also pay any applicable Local Facilities Management Plan fee for Zone
1, pursuant to Chapter 21.90. All such taxes/fees shall be paid at issuance of building permit. If
the taxes/fees are not paid, this approval will not be consistent with the General Plan and shall
become void.
13. Prior to the issuance of the building or grading permit, whichever occurs first, Developer shall
submit to the city a Notice of Restriction executed by the owner of the real property to be
developed. Said notice is to be filed in the office of the County Recorder, subject to the
satisfaction of the City Planner, notifying all interested parties and successors in interest that the
City of Carlsbad has issued Conditional Use Permit CUP 20220-0010 and Special Use Permit SUP
2022-0006 by Resolution No. 7464 on the property. Said Notice of Restriction shall note the
property description, location of the file containing complete project details and all conditions of
approval as well as any conditions or restrictions specified for inclusion in the Notice of
Restriction. The City Planner has the authority to execute and record an amendment to the notice
which modifies or terminates said notice upon a showing of good cause by the Developer or
successor in interest.
PC RESO NO. 7464 -8-
14. Project improvements in the Public Utilities (P-U) Zone shall be subject to the requirements of
the Encina Power Station Precise Development Plan, latest version.
15. The project shall comply with mitigation measures as contained in the Mitigation Monitoring
and Reporting Program prepared for EIR 03-05 and as included in the Supplemental EIR.
16. CUP 2022-0010 shall be reviewed by the City Planner annually to determine if all conditions of
this permit have been met and that the use does not have a substantial negative effect on
surrounding properties or the public health, safety and general welfare. If the City Planner
determines that: 1) the Conditional Use Permit was obtained by fraud or misrepresentation; or 2)
the use for which such approval was granted is not being exercised; or 3) the Conditional Use
Permit is being or recently has been exercised contrary to any of the terms or conditions of
approval or the conditions of approval have not been met; or 4) the use for which such approval
was granted has ceased to exist or has been suspended for one year or more; or 5) the use is in
violation of any statute, ordinance, law or regulation; or 6) the use permitted by the Conditional
Use Permit is being or has been so exercised as to be detrimental to the public health, safety or
welfare or so as to constitute a nuisance, the City Planner shall recommend that the Planning
Commission hold a public hearing and after providing the permittee the opportunity to be heard,
the Planning Commission may revoke and terminate the Conditional Use Permit in whole or in
part, reaffirm the Conditional Use Permit, modify the conditions or impose new conditions.
17. This Conditional Use Permit is granted without an expiration date. This permit may be revoked at
any time after a public hearing, if it is found that the use has a substantial detrimental effect on
surrounding land uses and the public's health and welfare, or the conditions imposed herein have
not been met.
Engineering Conditions
NOTE: Unless otherwise specified herein, all conditions below shall be satisfied prior to
grading plan approval, or building permit, whichever comes first; or pursuant to an approved
construction schedule at the discretion of the appropriate division manager or official.
Fees/ Agreements
18. Developer shall cause property owner to apply for, execute, and submit, to the city
engineer for recordation, an Encroachment Agreement covering the two private
temporary driveway approaches located over existing public right-of-way or easements
as shown on the site plan. Developer shall pay processing fees per the city's latest fee
schedule. Said agreement shall include a provision that within 18 months of approval of
the agreement, the applicant shall either remove the driveways and restore the public
improvements to its previous condition or obtain the necessary agency approvals to
continue the driveways as temporary or retain the driveways as permanent
improvements. The City Engineer may extend this time at his discretion.
Storm Water Quality
PC RESO NO. 7464 -9-
19. Developer shall comply with the city's Stormwater Regulations, latest version, and shall
implement best management practices at all times. Best management practices include but are
not limited to pollution control practices or devices, erosion control to prevent silt runoff during
construction, general housekeeping practices, pollution prevention and educational practices,
maintenance procedures, and other management practices or devices to prevent or reduce the
discharge of pollutants to stormwater, receiving water or stormwater conveyance system to the
maximum extent practicable. Developer shall notify prospective owners and tenants of the above
requirements.
20. Developer shall complete and submit to the city engineer a Determination of Project's SWPPP
Tier Level and Construction Threat Level Form pursuant to City Engineering Standards. Developer
shall also submit the appropriate Tier level Storm Water Compliance form and appropriate Tier
level Storm Water Pollution Prevention Plan (SWPPP) to the satisfaction of the city engineer.
Developer shall pay all applicable SWPPP plan review and inspection fees per the city's latest fee
schedule.
Dedications/Improvements
21. Prior to any work in city right-of-way or public easements, Developer shall apply for and obtain a
right-of-way permit to the satisfaction of the city engineer.
22. Developer shall prepare and process public improvement plans and, prior to city engineer
approval of said plans, shall execute a city standard Development Improvement Agreement to
install and shall post security in accordance with C.M.C. Section 18.40.060 for public
improvements shown on the site plan. Said improvements shall be installed to city standards to
the satisfaction of the city engineer. These improvements include, but are not limited to:
A. Temporary driveways on Carlsbad Boulevard to serve the Aquafarm site. Said
driveways shall be constructed to permanent standards, including American
Disability Act standards, regardless of whether the driveways are temporary or
later approved as permanent driveways under separate discretionary permit. The
driveway ramps extending onto private property may be constructed concurrent
with the driveway work constructed in the public right-of-way under a right-of-
way permit. No additional permits are necessary for constructing the driveway
ramps on private property unless the grading necessary to build said ramps
requires a grading permit per Section 15.16.050 of the Carlsbad Municipal Code.
Developer shall pay the standard improvement plan check and inspection fees in accordance with
the fee schedule. Improvements listed above shall be constructed within 36 months of approval
of the development improvement agreement or such other time as provided in said agreement.
Traffic and Mobility Condition
23. The dashed green bike lane required along Carlsbad Boulevard shall be completed to the
satisfaction of the city Traffic Engineer. Further, the six-inch dashed white line that is part of the
dashed green bike lane detail shall be per Caltrans Detail 39A.
PC RESO NO. 7464 -10-
Fire Department Condition
24. The city is constructing temporary Fire Station 7 on the grounds of the former Encina Power
Plant approximately 400-feet south of project improvements. Construction and operation of
project improvements shall not interfere with the fire station's operations as well as access to
and from the nearby driveway on Carlsbad Boulevard.
NOTICE TO APPLICANT
An appeal of this decision to the City Council must be filed with the City Clerk at 1200 Carlsbad Village
Drive, Carlsbad, California, 92008, within ten (10) calendar days of the date of the Planning Commission's
decision. Pursuant to Carlsbad Municipal Code Chapter 21.54, section 21.54.150, the appeal must be in
writing and state the reason(s) for the appeal. The City Council must make a determination on the appeal
prior to any judicial review.
NOTICE
Please take NOTICE that approval of your project includes the "imposition" of fees, dedications,
reservations, or other exactions hereafter collectively referred to for convenience as "fees/exactions."
You have 90 days from date offinal approval to protest imposition of these fees/exactions. If you protest
them, you must follow the protest procedure set forth in Government Code Section 66020(a), and file the
protest and any other required information with the City Manager for processing in accordance with
Carlsbad Municipal Code Section 3.32.030. Failure to timely follow that procedure will bar any subsequent
legal action to attack, review, set aside, void, or annul their imposition.
You are hereby FURTHER NOTIFIED that your right to protest the specified fees/exactions DOES NOT
APPLY to water and sewer connection fees and capacity charges, nor planning, zoning, grading, or other
similar application processing or service fees in connection with this project; NOR DOES IT APPLY to any
fees/exactions of which you have previously been given a NOTICE similar to this, or as to which the statute
of limitations has previously otherwise expired.
PC RESO NO. 7464 -11-
PASSED, APPROVED, AND ADOPTED at a regular meeting of the Planning Commission of
the City of Carlsbad, California, held on October 5, 2022, by the following vote, to wit:
AYES: Commissioners Lafferty, Kamenjarin, Merz, and Sabellico
NOES:
ABSENT: Commissioners Luna, Meenes and Stine
ABSTAIN:
' ALICIA LAFERTY, Vice C
CARLSBAD PLANNING C
ATTEST:
(JlAYJ~
MIKE STRONG
Assistant Community Development Director
PC RESO NO. 7464 -12-
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CUP 2022-0010, SUP 2022-0006
Carlsbad Desalination Plant
SITE MAP
J
SITE
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Map generated on: 9/21/2022
Former EncinaPower Station
5
AGUA HEDIONDALAGOON
EXHIBIT 2
Ccityof Carlsbad Development Services
Planning Division
1635 Faraday Avenue
(442)339-2610
www.carlsbadca.gov JUL 1 8 2022
Applicant's statement or disclosure of certain ownership interests on all applications which will require discretionary action on the part of the City Council or any appointed Board, Commission or Committee.
The following information MUST be disclosed at the time of application submittal. Your project cannot be reviewed until this information is completed. Please print.
Note: Person is defined as "Any individual, firm, co-partnership, joint venture, association, social club, fraternal organization, corporation, estate, trust, receiver, syndicate, in this and any other county, city and county, city municipality, district or other political subdivision or any other group or combination acting as a unit."
Agents may sign this document; however, the legal name and entity of the applicant and property owner must be provided below.
1.APPLICANT (Not the applicant's agent)
Provide the COMPLETE, LEGAL names and addresses of ALL persons having a financial
interest in the application. If the applicant includes a corporation or partnership, includethe names, titles, addresses of all individuals owning more than 10% of the shares. IF NOINDIVIDUALS OWN MORE THAN 10% OF THE SHARES, PLEASE INDICATE NONAPPLICABLE (N/A) IN THE SPACE BELOW. If a publicly-ownedcorporation, include the names, titles, and addresses of the corporate officers. (A separatepage may be attached if necessary.)
Person N/A Corp/Part. _____________ _
Title ____________ Title _______________ _
Address Address---------------
2.OWNER (Not the owner's agent)
P-1(A)
Provide the COMPLETE. LEGAL names and addresses of A!..b...persons having anyownership interest in the property involved. Also, provide the nature of the legal ownership(i.e., partnership, tenants in common, non-profit, corporation, etc.). If the ownershipincludes a corporation or partnership, include the names, titles, addresses of all individualsowning more than 10% of the shares. IF NO INDIVIDUALS OWN MORE THAN 10% OFTHE SHARES, PLEASE INDICATE NON-APPLICABLE (NIA) IN THE
SPACE BELOW. If a publicly-owned corporation, include the names, titles, and addresses
of the corporate officers. (A separate page may be attached if necessary.)
Person_N_/A __________ Corp/Part. ______________ _
Title Title _______________ _
Address __________ Address ______________ _
Page 1 of 2 Revised 3/22
EXHIBIT 3
..
3.NON-PROFIT ORGANIZATION OR TRUST
If any person identified pursuant to (1) or (2) above is a nonprofit organization or a trust, list the names and addresses of ANY person serving as an officer or director of the nonprofit organization or as trustee or beneficiary of the.
Non Profit/Trust N/A Non Profit/Trust'--------------
Title ____________ Title ________________ _
Address Address ______________ _
4.Have you had more than $500 worth of business transacted with any member of City staff,Boards, Commissions, Committees and/or Council within the past twelve (12) months? D Yes [xJ No If yes, please indicate person(s): ___________ _
NOTE: Attach additional sheets if necessary.
I certify that all the above information is true and correct to the best of my knowledge.
�� 7/1/2022
Signature of applicant/date
Eric Leuze, Cabrillo Power I LLC
Print or type name of owner
Sachin Chawla, Poseidon Resources (Channelside) LP
Print or type name of applicant
(Jh,,,v 7/1/2022
Signature of owner/applicant's agent if applicable/date
Sachin Chawla, Poseidon Resources (Channelside) LP
Print or type name of owner/applicant's agent
P-1(A) Page 2 of 2 Revised 3/22
Seventh Addendum
Precise Development Plan
and Desalination Plant
Project
Final Environmental Impact Report (EIR 03-05)
State Clearinghouse No. 2004041081
EIR Certified June 13, 2006
MAY 2022
Prepared for:
SAN DIEGO COUNTY WATER AUTHORITY
4677 Overland Avenue
San Diego, California 92123
Prepared by:
2280 Historic Decatur Road, Suite 200
San Diego, California 92106
EXHIBIT 4
Printed on 30% post-consumer recycled material.
7662 i MAY 2022
Table of Contents
SECTION PAGE NO.
1 Introduction and Background .............................................................................................................................. 1
2 CEQA Requirements ............................................................................................................................................. 2
3 Project Description ............................................................................................................................................... 4
3.1 Project Location and Setting .................................................................................................................. 4
3.2 Description of Approved Project ............................................................................................................ 5
3.3 Description of Proposed Modifications to the Approved Project ......................................................... 9
3.3.1 Components of the Proposed Modifications ........................................................................... 9
3.3.2 Construction Phasing and Schedule..................................................................................... 13
3.3.3 Operation and Maintenance ................................................................................................. 15
3.4 Proposed Modifications Compliance with the Order ......................................................................... 16
4 Required Actions ............................................................................................................................................... 17
5 Environmental Analysis of the Proposed Modifications ................................................................................. 17
5.1 Aesthetics ............................................................................................................................................ 18
5.2 Air Quality ............................................................................................................................................. 20
5.3 Biological Resources ........................................................................................................................... 30
5.4 Cultural Resources .............................................................................................................................. 43
5.5 Energy .................................................................................................................................................. 45
5.6 Geology and Soils ................................................................................................................................ 47
5.7 Greenhouse Gas Emissions ................................................................................................................ 49
5.8 Hazards and Hazardous Materials ..................................................................................................... 50
5.9 Hydrology and Water Quality ............................................................................................................... 52
5.10 Land Use and Planning ....................................................................................................................... 53
5.11 Noise and Vibration ............................................................................................................................. 54
5.12 Transportation and Traffic .................................................................................................................. 58
5.13 Public Utilities and Services Systems................................................................................................. 59
5.14 Cumulative Impacts ............................................................................................................................. 60
6 Determination ................................................................................................................................................... 64
7 References ........................................................................................................................................................ 65
TABLES
Table 1. Previously Approved Project and Proposed Project Comparison ..................................................................... 6
Table 2. CDP Process Water Use with Various Recovery Rates ...................................................................................... 9
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 ii MAY 2022
Table 3. Proposed Modifications Compliance with Intake Specifications of the Order ............................................. 16
Table 4. Construction Scenario Assumptions ............................................................................................................... 22
Table 5. Estimated Maximum Daily Construction Criteria Air Pollutant Emissions .................................................... 29
Table 6. Estimated Maximum Daily Operational Criteria Air Pollutant Emissions ...................................................... 30
Table 7. NOAA-Fisheries Marine Mammal Protection Thresholds ............................................................................... 36
Table 8. Distance to NMFS/Caltrans Thresholds for Fish ............................................................................................ 37
Table 9. Distance to NMFS/Caltrans Thresholds for Marine Mammals ..................................................................... 37
Table 10. Estimated Construction Fuel Use .................................................................................................................. 46
Table 11. Estimated Annual GHG Emissions ................................................................................................................ 50
Table 12. Construction Equipment Noise Emission Levels.......................................................................................... 55
Table 13. Predicted Construction Noise Levels ............................................................................................................ 56
Table 14. Representative Vibration Levels for Construction Equipment .................................................................... 57
FIGURES
Figure 1 Project Location ................................................................................................................................... 70
Figure 2 Project Area.......................................................................................................................................... 72
Figure 3 Proposed Modified Intake Design Site Plan ...................................................................................... 74
Figure 4 Proposed Modified Intake ..................................................................................................................... 2
Figure 5A Visual Simulation: Southern View from Agua Hedionda Lagoon Trail ................................................. 4
Figure 5B Visual Simulation: Southern View from Carlsbad Boulevard ............................................................... 6
Figure 6 Biological Resources .............................................................................................................................. 8
APPENDIX(CES)
A Order R9-2019-0003 - Revisions to Design of New Intake Structure for the Carlsbad Desalination Plant
B Air Quality, Greenhouse Gas Emissions, and Energy Calculations
C Geotechnical Design Report
D Noise Models
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 iii MAY 2022
INTENTIONALLY LEFT BLANK
7662 iv MAY 2022
Acronyms and Abbreviations
Acronym/Abbreviation Definition
bgs below ground surface
BMZ brine mixing zone
CalEEMod California Emissions Estimator Model
CARB California Air Resources Board
CEC California Energy Commission
CEQA California Environmental Quality Act
CDP Carlsbad Desalination Project
CH4 methane
City City of Carlsbad
CO carbon monoxide
CO2 carbon dioxide
CO2e CO2 equivalent
dB Decibel
dBA A-weighted decibel
Desalination Amendment Amendment to the Water Quality Control Plan for Ocean Waters of California
Addressing Desalination Facility Intakes, Brine Discharges, and Other Non-
Substantive Changes
DFS Dual Flow Screens
EFZ State of California Earthquake Fault Zone
EPS Encina Power Station
FEIR Precise Development Plan and Desalination Plant Final Environmental Impact
Report
FTA Federal Transit Administration
GHG greenhouse gas
GHG Plan Energy Minimization and Greenhouse Gas Reduction Plan
GWP global warming potential
HSWRI Hubbs Sea World Research Institute
I-5 Interstate 5
in/sec inches per second
Lagoon Agua Hedionda Lagoon
Leq equivalent sound level
MGD million gallon per day
MLMP Marine Life Mitigation Plan
mm millimeter
MT metric tons
MWh megawatt-hours
N2O nitrous oxide
NCTD North County Transit District
NOx oxides of nitrogen
NPDES National Pollutant Discharge Elimination System
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NSR Nearest noise-sensitive receptor
Order Order R9-2020-0004 (NPDES No. CA0109223)
O3 ozone
PDP Precise Development Plan
PM2.5 particulate matter with an aerodynamic diameter less than or equal to 2.5 microns in
size
PM10 particulate matter with an aerodynamic diameter less than or equal to 10 microns in
size
ppt parts per trillion
PPV peak particle velocity
RCNM Roadway Construction Noise Model
RO reverse osmosis
RWQCB Regional Water Quality Control Board
SDAB San Diego Air Basin
SDG&E San Diego Gas and Electric
SMAQMD Sacramento Metropolitan Air Quality Management District
SOx sulfur oxides
Supplemental EIR Supplement to the FEIR
SWPPP Stormwater Pollution Prevention Plan
SWRCB State Water Resources Control Board
TWB TWB Environmental Research and Consulting
VMT vehicle miles traveled
VOCs volatile organic compounds
Water Authority San Diego County Water Authority
WWS wedge wire screen
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1 Introduction and Background
The purpose of this document is to analyze the proposed modifications to the Carlsbad Desalination Project (CDP)
approved intake and discharge system pursuant to the California Environmental Quality Act (CEQA). The CDP was
previously analyzed under CEQA in the Precise Development Plan and Desalination Plant Final Environmental
Impact Report (FEIR) (State Clearinghouse No. 200404181) for the CDP, which was certified by the City of Carlsbad
(City) on June 13, 2006 (City of Carlsbad 2006). The FEIR analyzed an annual average 50 million gallon per day
(MGD) seawater desalination plant collocated with the Encina Power Station (EPS) and offsite water conveyance
facilities located within the cities of Carlsbad, Oceanside, and Vista. The CDP and water conveyance facilities were
subsequently modified, and these minor changes were addressed in the First through Fifth Addendum to the FEIR.
A Supplement to the FEIR (Supplemental EIR) was also prepared and adopted by the San Diego County Water
Authority (Water Authority) on August 25, 2016 (State Clearinghouse No. 2015091060) to evaluate changes to the
CPD intake and discharge system that would facilitate closure of the EPS and permanent stand-alone operation of
the CDP and the potential to increase the annual average production of the CDP from 54 MGD to 60 MGD in the
future due to technological water processing improvements (San Diego County Water Authority 2016). These
changes were made to satisfy the requirements of the Amendment to the Water Quality Control Plan for Ocean
Waters of California Addressing Desalination Facility Intakes, Brine Discharges, and Other Non-Substantive
Changes (Desalination Amendment), which was adopted by the State Water Resources Control Board (SWRCB) on
May 6, 2015.
After the approval of the Supplemental EIR, the project proponent in collaboration with the SWRCB and San Diego
Regional Water Quality Control Board identified project specific design modifications to the CDP intake (known as
Alternative 21) and discharge system that would further reduce biological impacts identified in the Supplemental
EIR, which were addressed in the Sixth Addendum to the FEIR. The approved Alternative 21 intake design includes
the relocation (from on shore to submerged in the Agua Hedionda Lagoon) and modification of the new intake
screening system; changes to the intake and discharge tunnels, the discharge pond and channel and auxiliary
facilities; relocation of the fish friendly intake pumping structure; and implementing a pilot intake program
(demonstration project) to test the design of the 1.0 mm wedgewire screens effectiveness (proposed modifications),
prior to finalizing the design and construction of the full scale intake facilities.
In combination the FEIR, First through Sixth Addenda, and the Supplemental EIR represent the “approved project.”
The approved project includes construction and permanent stand-alone operation of the CDP with the potential for
producing an annual average of 60 MGD of product water, an offshore submerged intake structure, water
conveyance infrastructure, and other ancillary facilities required for operation of the CDP and distribution of the
product water.
The San Diego Regional Water Quality Control Board Order No. R9-2019-0003 as amended by Order R9-2020-
0004 (National Pollutant Discharge Elimination System [NPDES] No. CA0109223) (Order) establishes requirements
for the discharge of reverse osmosis brine and pretreatment backwash flows from the CDP into the Pacific Ocean
and implements the Water Code section 13142.5(b) determination (Water Code Determination) for stand-alone
operations of the CDP in accordance with the Water Quality Control Plan for Ocean Waters of California, California
Ocean Plan (State Water Resources Control Board 2019).
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Feasibility concerns associated with the approved intake design arose after the adoption of the Order. Poseidon
completed construction of the new fish-friendly intake pump station in June 2020, which marked the transition
from co-located operation with the Encina Power Station (EPS) to stand-alone operation for the CDP. Along with this
transition, the CDP stopped receiving chlorinated seawater from the EPS cooling water pumps. The elimination of
chlorine dosing upstream of the CDP intake led to a sudden and unforeseen significant increase in the buildup of
marine growth in the existing CDP intake pipeline.
A key feature of the approved intake design includes intake screens that are located in the Lagoon nine hundred
feet north of the existing EPS intake. The screened seawater would be transported to shore in four large diameter
pipelines. The inclusion of these pipelines in the intake design would significantly increase the intake area exposed
to marine growth. Based on inspections of marine growth, it is estimated that the intake pipelines associated with
the approved project would need to be cleaned approximately every three to six months to keep the marine growth
from constraining water production. The CDP would not be able to operate while the pipeline cleaning is underway
and water production would not resume until the residual debris is removed and the turbidity in the intake is in
compliance with the CDP operating permits. The expected downtime for pipeline cleaning, removal of the
accumulated marine growth, and stabilization of the intake water quality would halt water production and delivery
for up to two months a year. Therefore, the plant downtime required to clean the expanded intake area and remove
the accumulated marine growth makes the approved intake design infeasible.
Since the adoption of the Order, the project proponent and the Water Authority have thoroughly investigated the
operational reliability issues associated with the Alternative 21 intake design, which resulted in the development
of proposed modifications to the intake design to be addressed by this Seventh Addendum to the FEIR. The
proposed modifications move the new intake structure closer to the shore, eliminating the intake pipelines, and
using dual flow screens (DFS) that provide for debris removal and screen maintenance from the shore.
This Seventh Addendum includes a discussion of the CEQA Requirements for an addendum (Section 2), a
description of the previously approved project (Section 3), a description of the proposed modifications to the
previously approved project (Section 3), a list of the Water Authority actions required to approve these proposed
modifications (Section 4), an analysis of the potential impacts of the proposed modifications (Section 5), and a
determination and conclusions with respect to the CEQA requirements (Section 6).
2 CEQA Requirements
CEQA Guidelines Sections 15162 through 15164 discuss a lead or responsible agency’s responsibilities in handling
new information that was not included in a project’s certified EIR. The provisions of Section 15164 apply to the
Water Authority as the responsible agency under CEQA because the proposed modifications to the approved project
involve actions that are under the purview of the Water Authority.
Section 15162 of the CEQA Guidelines provides the following:
(a) When an EIR has been certified or a negative declaration adopted for a project, no subsequent EIR shall be
prepared for that project unless the lead agency determines, on the basis of substantial evidence in the
light of the whole record, one or more of the following:
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(1) Substantial changes are proposed in the project which will require major revisions of the EIR or
negative declaration due to the involvement of new significant environmental effects or a
substantial increase in the severity of previously identified significant effects;
(2) Substantial changes occur with respect to the circumstances under which the project is undertaken
which will require major revisions of the EIR or negative declaration due to the involvement of new
significant environmental effects or a substantial increase in the severity of previously identified
significant effects; or
(3) New information of substantial importance, which was not known and could not have been known
with the exercise of reasonable diligence at the time the EIR was certified as complete or the
negative declaration was adopted, shows any of the following:
(A) The project will have one or more significant effects not discussed in the previous
EIR or negative declaration;
(B) Significant effects previously examined will be substantially more severe than shown
in the previous EIR;
(C) Mitigation measures or alternatives previously found not to be feasible would in fact
be feasible and would substantially reduce one or more significant effects of the
project, but the project proponents decline to adopt the mitigation measure or
alternative; or
(D) Mitigation measures or alternatives which are considerably different from those
analyzed in the previous EIR would substantially reduce one or more significant effects
on the environment, but the project proponents decline to adopt the mitigation
measure or alternative.
(b) If changes to a project or its circumstances occur or new information becomes available after adoption of
a negative declaration, the lead agency shall prepare a subsequent EIR if required under subdivision (a).
Otherwise the lead agency shall determine whether to prepare a subsequent negative declaration, an
addendum, or no further documentation.
Section 15164 of the CEQA Guidelines provides the following:
(a) The lead agency or responsible agency shall prepare an addendum to a previously certified EIR if some
changes or additions are necessary but none of the conditions described in Section 15162 calling for
preparation of a subsequent EIR have occurred.
(b) An addendum need not be circulated for public review but can be included in or attached to the final EIR
or adopted negative declaration.
(c) The decision-making body shall consider the addendum with the final EIR or adopted negative declaration
prior to making a decision on the project.
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(d) A brief explanation of the decisions not to prepare a subsequent EIR pursuant to Section 15162 should be
included in an addendum to an EIR, the lead agency’s finding on the project, or elsewhere in the record.
The explanation must be supported by substantial evidence.
This Seventh Addendum to the FEIR fulfills and conforms to the provisions of CEQA (California Public Resources
Code, Section 21000 et seq.) and the CEQA Guidelines, Section 15164, providing for the preparation of an
addendum.
3 Project Description
3.1 Project Location and Setting
The proposed modifications are located in the City of Carlsbad in the northern portion of San Diego County,
California (Figure 1, Project Location and Figure 2, Project Area). Other components of the approved project,
including pipelines, are located in the City of Carlsbad, the City of Vista, and the City of San Marcos. The project site
is located on the EPS site and within the Agua Hedionda Lagoon (Lagoon) between the Interstate 5 (I-5) and the
Pacific Ocean. The proposed modifications would be constructed on the approved project site at 4590 Carlsbad
Boulevard, Carlsbad, California 92008 and within the Lagoon.
Land uses surrounding the project site include residential and active and passive recreational uses such as
swimming, surfing, walking, bird watching, fishing, and the mobile aquaculture facility to the north; residential,
commercial and industrial uses to the south; I-5 and North County Transit District (NCTD) railroad tracks to the east;
and beyond that open space and agriculture, and the Pacific Ocean to the west. The NCTD railroad tracks bisect
the Precise Development Plan (PDP) area. To the north, adjacent to the outer lagoon is the Hubbs-Sea World
Research Institute and fish hatchery. This facility has been in operation since 1995 and includes a 22,000-square-
foot hatchery which is contributing to the restoration of the California white sea bass population through
aquaculture and fishery enhancement.
The Lagoon is one of three coastal lagoons within the City of Carlsbad and is located in the west-central portion of
the City. The lagoon comprises approximately 230 acres of water surface and extends 1.7 miles inland from the
coast. At its widest point, the lagoon is 0.5 mile wide. Agua Hedionda Creek enters the lagoon at its easternmost
point. The area surrounding the lagoon is characterized by open areas along the northern and southern shorelines
with residential development occurring on the bluffs above the lagoon to the north. Active mobile agricultural fields
occupy a portion of the slopes along the southern shoreline. The middle and inner (i.e. eastern) lagoons are leased
to the City as an aquatic-oriented recreational area. The middle lagoon has a recreation facility that is used by the
YMCA for water sports and overnight camp groups. The inner lagoon is used for water sports, such as boating and
jet skiing, and is administered by the City of Carlsbad, which issues recreational use permits and collects fees. The
outer (i.e. western) lagoon includes existing aquaculture uses that benefit from the Pacific Ocean inflows that occur
through the lagoon inlet/outlet. These flows are made possible by periodic dredging of the lagoon. No public access
is permitted to the outer lagoon.
South of the power plant area is the San Diego Gas and Electric (SDG&E) Operations Center and Cannon Park.
Single-family residential neighborhoods are located generally south of Cannon Road, and west of Carlsbad
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Boulevard. The neighborhood west of Carlsbad Boulevard is referred to as the Terra Mar subdivision. North and
south of Cannon Road between the NCTD Railroad right-of-way and I-5 are commercially and industrially zoned
areas. To the west of the EPS across Carlsbad Boulevard, is the Pacific Ocean and Carlsbad State Beach. To the
north of the EPS, across the Lagoon, is the Hubbs Sea World Research Institute (HSWRI).
3.2 Description of Approved Project
The approved project (Alternative 21), as analyzed in the Sixth Addendum, includes construction and permanent
stand-alone operation of the CDP with the potential for producing an annual average of 60 MGD of product water,
an offshore submerged intake structure, water conveyance infrastructure, and other ancillary facilities required for
operation of the CDP and distribution of the product water. A summary of the approved projects, as analyzed in the
2005 FEIR, 2016 Supplemental EIR, and Sixth Addendum, and the project modifications are provided in Table 1.
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Table 1. Previously Approved Project and Proposed Modifications Comparison
Components
Proposed Project (7th
Addendum) 2005 FEIR 2016 Supplemental EIR 6th Addendum
Project Components
Proposed components DFS structure, deck, and
floating boom
Electrical building, boat
ramp, marine research
portable container
Intake channel and
discharge channel
demolition/abandonment
in place
Construction of
desalination facility to
house the reverse
osmosis process area,
water treatment
chemicals storage and
pumps, product water
pumps, administrative
offices and other
appurtenant facilities to
support the plant
Connection to the
seawater discharge
channel, and electrical
connections
Removal of a fuel oil
storage tank
Construction of product
water storage, a pumping
station,
and finished water
conveyance pipelines
Construction of a new
screening/fish friendly
pumping structure, a fish
return system, auxiliary
facilities
Connection to CDP intake
Permanent stand-alone
operation of the CDP
WWS demonstration
project
Installation of a
submerged intake
system in Agua
Hedionda Lagoon
(including WWS and
pipelines)
Relocation of the
approved fish-friendly
pumping structure,
auxiliary facilities, and
minimal improvements to
the existing EPS intake
and discharge tunnels,
discharge pond and
channel
Maximum daily lagoon withdrawal
Brine dilution
Screen wash and/or fish return
Processing at CDP
Annual average product water
299 mgd
171-198 mgd
1 mgd
100-127 mgd
60 mgd
304 mgd
Up to 200 mgd
0 mgd
104-114 mgd
50 mgd
299 mgd
171-198 mgd
1 mgd
100-127 mgd
55 mgd
299 mgd
171-198 mgd
1 mgd
100-127 mgd
60 mgd
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Table 1. Previously Approved Project and Proposed Modifications Comparison
Components
Proposed Project (7th
Addendum) 2005 FEIR 2016 Supplemental EIR 6th Addendum
Discharge 67 mgd 60.3 mgd 67 mgd
67 mgd
Intake system Construction of a DFS
structure and deck
structure in the Agua
Hedionda Lagoon
Utilization of existing EPS
intake pipeline
New Intake Structure
Connect to existing EPS
intake tunnel structure to
connect with CDP intake
Seal off EPS intake tunnels
Submerged intake
system in Agua Hedionda
Lagoon
CDP’s intake connection
point to existing EPS
intake tunnel relocated
Discharge system No change Utilization of existing EPS
discharge channel and
discharge pond
Fish-friendly dilution pumping
structure
Seal off EPS discharge
tunnels
Utilization of existing EPS
discharge pond
CDP’s discharge
connection point to
existing EPS discharge
tunnel relocated
Offsite water delivery facility pipelines No changes Multiple distribution
pipeline alignments
considered in Carlsbad,
Oceanside, and Vista
No changes No changes
Waterside construction Yes No Yes Yes
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3.3 Description of Proposed Modifications to the
Approved Project
3.3.1 Components of the Proposed Modifications
Overview
In general, the proposed intake design modification would include installation of a partially submerged intake
system in the Lagoon (including new DFS structure, new deck structure, and a floating boom). A debris return area,
which would include a debris bin, and debris pipeline, would be constructed between the discharge pond and intake
system. In addition, modifications include the installation of a prefabricated electrical building, the demolition of
the marine research shed and relocation and replacement with a portable container and the replacement and
relocation of the boat ramp. The modifications would involve the abandonment-in-place/demolition of the existing
EPS intake screens and channels and the 72-inch feeder line, the discharge channel, and construction of a new
72-inch intake pipeline (feeder) and vault.
The partially submerged intake system would be located in the Lagoon directly north of the existing EPS intake that
would direct seawater to the existing EPS intake tunnels (see Figure 3, Proposed Modified Intake Design Site Plan).
The source water of approximately 299 MGD would pass through the partially submerged intake screening system
and then to the existing intake pump station which would continue to deliver the process feedwater (up to 127
MGD) to the CDP for processing through the pre-treatment and reverse osmosis (RO) membrane desalination
system. Approximately half the water volume processed by the CDP would leave the CDP as potable drinking water,
and the other half would be concentrated seawater with approximately twice the original intake water salinity.
Specifically, depending on seawater temperature, treatment process cleaning needs and other factors, the CDP
operates at product water recovery rates between 48% to 50% (e.g., 48 to 50 gallons of fresh water produced for
every 100 gallons of seawater processed by the RO system). In addition, a small amount of intake seawater is used
for backwash of the pretreatment filters. The plant operator adjusts the flows between the RO brine discharge and
backwash waste streams to optimize the efficiency and effectiveness of plant operations as outlined in Table 2.
Table 2. CDP Process Water Use with Various Recovery Rates
CDP Process Intake (MGD)
Product Water
(MGD)
Recovery
Rate (%)
RO Brine
Discharge1
(MGD)
Backwash
Waste
Streams2
(MGD)
Combined
Discharge
(MGD)
127 60 48 65 2 67
127 60 49 62.5 4.5 67
127 60 50 60 7 67
Source: Appendix A
Notes: CDP = Carlsbad Desalination Plant; MGD = Million gallons per day; RO = Reverse Osmosis
1 Reverse Osmosis Brine Discharge rate is derived as follows:
Product Water / Recovery Rate = Intake Seawater Required then,
Intake Seawater Required – Product Water = RO Brine Discharge (e.g. 60 MGD/0.48 = 125 MGD, then
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125 MGD - 60 MGD = 65 MGD).
2 Backwash Waste Streams = CDP Process Intake – Product Water – RO Brine Discharge.
The remaining water passing through the intake screens would be transferred to the discharge tunnel by fish-
friendly pumps to reduce the salinity of the brine discharge (flow augmentation) from the CDP before being
discharged into the Pacific Ocean. Under all operating conditions, the quantity and quality of discharge from the
CDP is the same or less than that analyzed in the Supplemental EIR and Addendum 6 under the approved project
and approved under Regional Water Quality Control Board (RWQCB) NPDES R9-2019-0003:
1. The maximum daily average intake flow is 299 MGD;
2. The maximum combined discharge flow (RO brine and backwash) is 67 MGD;
3. The salinity of the combined discharge is between 64 to 67 parts per trillion (ppt);
4. The maximum daily average salinity in the discharge pond after mixing with the dilution water from the flow
augmentation system is 42 ppt; and
5. The maximum daily average salinity in the Pacific Ocean is less than or equal to 2 ppt over natural
background salinity measured at the edge of the brine mixing zone 200 meters (656 feet) away from the
point of discharge.
Dual Flow Screens Intake Structure
The DFS would have 1-millimeter (mm) slot widths and a through-slot velocity of 0.5 feet per second or less
(including 15% screen inclusion) for compliance with the Desalination Amendment (SWRCB 2015).
The DFS structure would house the screens, baffle walls, and the large organism exclusion device (i.e. mammals
and turtles and would be added only if required by a regulating entity but is included in this addendum). The DFS
structure is approximately 160 feet by 32 feet and extends approximately 25 feet above water (mean sea level)
and 15 feet below the water (mean sea level) for a total height of approximately 40 feet tall (see Figure 4, Proposed
Modified Intake). The DFS structure would be anchored with approximately 46 piles and approximately 1 pile in
between each DFS for flow distribution for approximately 10 piles, totaling approximately 56 piles (approximately
14 - 24 square inches each). Within the structure, a total of 11 DFS units (10 duty, 1 standby) would be installed..
The screens would either be fabricated from 316 grade stainless steel and include a cathodic protection system or
super duplex stainless steel. Located above water, a grated access way would be installed between the DFS which
allows for access to equipment for ongoing daily and long-term maintenance and inspections. All mechanical and
electrical components would remain above water.
The DFS continuously rotate 1 mm WWS panels contained within a vertical steel frame. The water being screened
passes from the outside of the screen to the inside of the frame, then out through the back opening (see Exhibit 1).
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Exhibit 1. Dual Flow System
The screen panels are propelled on a chain link fitted with a water soluble/food grade lubricated roller. As the
screen panels descend A high-pressure wash spray will be used to remove the debris from the screens and into a
combined trough/pipeline that carries both water and debris to the discharge pond. At the end of the
trough/pipeline there will be a trash/debris sorting area that will allow trash to be removed before brushing organic
debris into the discharge pond.
In addition, the DFS structure requires a means to direct flow from the Lagoon, through the screening system and
into the existing intake tunnels. To accommodate this requirement, baffle wall panels and wing walls would span
between screens and along the east and west side of the DFS structure. The baffle walls and wing walls would be
oriented towards the Lagoon to direct flow into the DFS and from the DFS structure to the existing intake tunnels.
Floating Boom
A floating debris boom/curtain would be installed in front of the intake screens to block floating debris from
entering the proposed DFS structure. The floating debris boom/curtain would extend from the surface of the
Lagoon to approximately 3 to 5 feet below the surface of the water and would be anchored to the Lagoon floor. The
anchor would include a riser connection system that allows the floating debris boom/curtain to rise and fall freely
with tidal fluctuations. The floating boom will collect surface debris near the east and west ends of the boom. A
workboat would be required to remove debris on an as needed basis to collect and remove trash then dispose of
organic debris in the discharge pond.
In addition, the large organism exclusion device would be installed between the floating debris boom/curtain and
the DFS structure to avoid impacts to marine species. Staff will operate the debris rake once or twice a day (as
needed) to remove debris off the large mammal exclusion device and drop debris into a collection bin near the
discharge pond. Trash will be removed from the bins and the remaining organic debris will be dropped into the
discharge pond.
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Deck
An above water deck located south of the DFS structure, spanning from the east side to the west side of the Lagoon,
would be constructed to serve as vehicle and pedestrian access for the intake system maintenance. The deck
includes the installation of approximately 58 piles (14 - 24 square inches each) and would be approximately 200
feet long and 30 feet wide. This deck structure may have a flexible connection to the DFS structure such that each
moves independently, which would be evaluated during final design.
Electrical Building
A prefabricated electrical building would be located near the existing electrical building and would be approximately
500 square feet and at an elevation of approximately 14 feet above grade. This structure would house electrical
needs to power the new screens.
Boat Ramp
The existing boat ramp, which is located in the footprint of the deck, would be demolished. A new boat ramp would
be installed north of the intake and floating boom. Two locations are being considered for the boat ramp. One
located northwest of the floating boom and one located northeast of the floating boom. The boat ramp would include
an 8 foot by 8 foot square platform, a 3 foot by 10 foot ramp to dock platform, and a 3 foot by 20 foot concrete
stairs and platform.
Marine Research Portable Container
The existing marine research shed is located south of the discharge pond. This existing shed would be removed
and replaced with a portable container. The portable container would be located northwest of the existing shed and
south of the discharge pond.
Temporary Fish Farm Access
The existing access to the aquafarm facility will be restricted during construction. Two temporary access ramps will
be installed to provide aquafarm vehicle access during construction from Carlsbad Boulevard. The access ramps
will transition from concrete to gravel. Once construction is completed, the curb, gutter, and sidewalk will be
returned to match existing conditions.
Intake Channel and Discharge Channel and Feeder Line Demolition/Abandonment in Place
The former cooling water system for the EPS consisted of two, below-ground concrete intake channels (inside
dimensions of each channel 8 feet high by 11 feet wide) and one below-ground concrete discharge channel (inside
dimensions 8 feet high by 15 feet wide). The wall thickness of the reinforced concrete channels is approximately 3
feet. After the intake modifications are constructed, the screens (including auxiliary equipment) will be removed
and approximately 300-foot lengths of the intake and discharge channels south of the lease line will be abandoned-
in-place/demolished.
In addition, adjacent to the discharge channel, an intake concrete vault was constructed in 2013-2015. The 10
foot by 11 foot concrete vault (approximately 30 feet deep) connects the discharge channel to the desalination
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plant’s Intake Pump Station via a 72-inch reinforced fiberglass plastic (FRP) pipeline, approximately 300 feet long.
The 72-inch intake pipeline and the vault will be abandoned-in-place/demolished.
3.3.2 Construction Phasing and Schedule
The EPS decommissioning occurred on December 11, 2018. After which, the transition to a CDP stand-alone
operation involved: 1) continued use of the EPS screens and pumps while constructing the fish- friendly pumping
station (interim improvements); 2) operation of the EPS screens in conjunction with the fish-friendly dilution pumps,
while the intake structure is constructed, and EPS tunnels are modified (permanent improvements); and 3)
operation of the permanent standalone intake and discharge modification for the CDP.
Construction of the CDP stand-alone intake system includes two separate phases with the first phase focused on
construction of the fish-friendly pump station and the second phase focused on the installation the new intake
structure and modification of the EPS tunnels. The first phase of construction, the fish-friendly pump station, was
completed in June 2020. The second phase of construction, the new intake structure (i.e. the proposed
modifications) are anticipated to begin in Q3 2022 and last approximately one year. The following general
construction subphases would be required for construction of the proposed intake system modifications:
Construction - Phase 2 (Permanent Improvements):
1. Mobilization/Temporary Access Driveways for Aquafarm
a. Removal and relocation of a portable container for the marine research shed
b. Replacement and relocation of the boat ramp
c. Placement of electrical building
d. Construction of temporary access driveway
2. Turbidity curtain install, dredging/excavation of approximately 2,200 cubic yards of the Lagoon floor for
screen structure foundation installation, and backfill
3. Temporary trestle installation
a. Pile driving
b. Work platform structure installation
c. Final removal
4. Pile driving (for screen, baffle walls, and deck)
a. Screens
b. Baffle walls
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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14 MAY 2022
c. Deck
5. Intake screen structure construction
a. Floor slab for screen support
b. Screen structures
c. Baffle walls
d. DFS
e. Floating debris boom/curtain
f. Large organism exclusion device
6. Deck structure construction
7. Install 72-inch line
a. Shoring
b. Sheet piles
c. Steel sheets
d. Excavation
e. Soil stockpile
8. Construct vault for bulkhead and discharge isolation
a. Existing mechanical equipment including traveling screens, spray wash pumps etc. will be removed
and recycled as scrap steel.
b. Existing steel stop logs will be removed and recycled as scrap steel.
c. Existing electrical equipment, conduits, wiring, electrical panels and lights will be removed. Usable
material will be recycled as scrap.
d. Any existing concrete (curbs, concrete columns for the former gantry crane) will be demolished to
existing grade.
9. Plant Shutdown:
a. Connection of the new onshore intake pipeline from the intake tunnel to the existing intake pump
station
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b. Sealing the intake and discharge tunnels
10. Commissioning and testing
11. Demolition/Abandonment of existing tunnels and 72-inch feeder line
12. Demobilization
3.3.3 Operation and Maintenance
Maintenance activities for the DFS may include the following:
1. Checking of overall operation, oil leaks/levels, spray wash system operation and pressure, debris
trough/pipeline, tension of chains, etc.
2. Routine and long-term inspections of drive gearbox, spray nozzles, chains/sprockets, screen mesh, frame
condition, roller track, guides, controls/alarms, etc.
3. Applying grease, changing oil, tightening chains, and water soluble/food grade adding lubricants as
needed.
Typically, a DFS itself would last for a 30-year cycle with proper maintenance. However, the DFS chain may
have to be replaced every 2-3 years and can be performed with the assistance of divers in the water. In
addition, if the guides need repair or replacement, the DFS would be removed and the work would be
performed onshore.
As noted above, debris maintenance would require the use of a high-pressure wash spray that would be used
to remove the debris from the screens and into a combined trough/pipeline that carries both water an d debris
to the discharge pond. At the end of the trough/pipeline there would be a trash/debris sorting area that would
allow trash to be removed before brushing organic debris into the discharge pond. Portions of the floating
debris boom/curtain would be adjustable to allow for surface maintenance vessel entrance/exit to the area.
As noted above, the floating boom would collect surface debris near the east and west ends of the boom. A
workboat would be required to remove debris on an as needed basis to collect and remove trash then dispose
of organic debris in the discharge pond. In addition, the large organism exclusion device would be installed
between the floating debris boom/curtain and the DFS structure to avoid impacts to marine species. Staff
would operate the debris rake once or twice a day (as needed) to remove debris off the large mammal
exclusion device and drop debris into a collection bin near the discharge pond. Trash would be removed from
the bins and the remaining organic debris would be dropped into the discharge pond.
No additional operational staff at the CDP is expected to be required for the operation of the proposed
modifications. As described previously, the plant downtime required to clean the expanded intake area and
remove the accumulated marine growth makes the approved intake design infeasible. The proposed modifications
to the intake design would result in a reduction of required maintenance to clean the intake structure of marine
growth when compared to the approved design. The proposed modifications would include exterior nighttime
security lighting in compliance with City of Carlsbad ordinances with respect to shielding, light pollution reduction,
glare, and sky glow.
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16 MAY 2022
3.4 Proposed Modifications Compliance with the Order
The proposed modifications would move the new intake structure closer to the shore, eliminating the intake
pipelines, and using DFS that provide for debris removal and screen maintenance from the shore. This intake design
is similar to the Alternative 9 Intake Design the San Diego Regional Water Quality Control Board previously found
to be feasible (Appendix A). Other than these changes, the proposed intake design is fully compliant with the Intake
Specifications described in Section IV.C of the Order, as shown in Table 3.
Table 3. Proposed Modifications Compliance with Intake Specifications of the Order
Intake Specifications (Section IV.C of the Order)
Proposed Change
The intake of seawater from Agua Hedionda Lagoon shall
comply with these specifications following completion of the
new intake structure in accordance with the time schedule
described in section VI.C.7 of this Order and Attachment H of
the Order:
The new intake structure shall be completely constructed and
operable in accordance with the requirements of this Order;
Revise description of the new intake
structure in Attachment H of the Order
to reflect the proposed modification to
the intake structure design.
The intake of seawater must not exceed 330 MGD with the existing
intake pumps and 299 MGD with the new intake pumps;
No change.
Surface water intakes must be screened at the onset of the intake of
seawater. Screens must be functional while the Facility is
withdrawing seawater;
No change.
To reduce entrainment, all surface water intakes must be screened
with a 1.0 millimeter (0.04 inch) or smaller slot size screen when the
Facility is withdrawing seawater;
No change.
To minimize impingement, the through-screen velocity at the onset of
the surface water intake must not exceed 0.15 meters per second
(0.5 feet per second) at all times;
No change.
The intake of seawater shall be reduced to the minimum volume
necessary to maintain Facility operations;
No change.
To the maximum extent practicable, in-plant recycling of waste
streams shall be maximized before intaking additional seawater;
No change.
The Discharger shall cease intake of seawater except when intake of
seawater is necessary to maintain Facility operations or to comply
with this Order;
No change.
Heat treatment of the intake system is prohibited; and No change.
Pump operations for intake of seawater with the new intake pumps
shall minimize abrupt changes in flow velocity.
No change.
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4 Required Actions
To process the proposed modifications, the following Water Authority actions are required:
• EIR 03-05(B) – Seventh Addendum to the approved project’s certified FEIR and Supplemental EIR; as a
lead agency under CEQA, the Water Authority will be approving this Seventh Addendum; and
• Approval of an amendment to the Carlsbad Seawater Desalination Project Water Purchase Agreement
(Contract ID 061501) for the approved project between the Water Authority and Poseidon Resources
(Channelside) LP, and authorizing construction of the facilities described in this Seventh Addendum, and
subsequent permits.
As noted in the Supplemental EIR, additional approvals may be required as follows:
• RWQCB - NPDES Consistency Determination or Amendment
• RWQCB – 401 Water Quality Certification
• City of Carlsbad – Precise Development Permit Consistency Determination or Amendment, SUP and/or CUP
• City of Carlsbad – Construction Permits
• California Coastal Commission - Coastal Development Permit Material Amendment
• Army Corps of Engineers – Section 404 Clean Water Act and Section 10: Rivers and Harbors Act NWP 7:
Outfall Structures and Associated Intake Structure
• National Marine Fisheries Service – Take Permit/Waiver (if needed)
5 Environmental Analysis of the
Proposed Modifications
For each environmental resource area, this Seventh Addendum provides a comparative analysis of the impacts
presented in the previous environmental documents. The analysis includes a determination regarding the
occurrence of any new significant impacts or an increase in the severity of previously identified impacts. Finally, an
analysis is presented to determine whether there are any changed circumstances or new information relative to the
proposed modifications. Because the proposed modifications only pertain the CDP intake system, no other portion
of the approved project is discussed (such as the conveyance facilities).
This analysis supports the Water Authority’s determination that the proposed modifications would not result in new
significant impacts that were not analyzed in the previous environmental documents and would not result in a
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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substantial increase in the severity of significant impacts that were identified in the previous environmental
documents.
5.1 Aesthetics
Previous Analysis
Analysis of aesthetics impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.1, pages 4.1-10 through 4.8-12. See also CEQA Findings, pages 10 and 11.
The previous FEIR and Sixth Addendum concluded that because aesthetic impacts from construction activities
would be short-term and within limited areas, construction-related impacts to visual resources would be considered
less than significant.
The FEIR analyzed the addition of CDP facilities on the EPS site and determined that impacts would be less than
significant with implementation of mitigation measures for landscaping and trees, screening mechanical
equipment, minimizing external lighting, and conforming to the PDP visual requirements. The Supplemental EIR
determined that aesthetic impacts from onsite modifications to the existing seawater intake, including installation
of new screening/fish-friendly pumping structure, a fish return system, and auxiliary facilities would have a less
than significant impact on aesthetics. The Sixth Addendum determined that the project modifications would not
result in additional impacts or increase the severity of impacts identified in the FEIR, and therefore would not
change the FEIR conclusions that aesthetic impacts would be less than significant.
Offsite product water conveyance facilities, including vaults, pump stations, chemical injection facilities, pipelines,
and flow control buildings were analyzed in the previous environmental documents. Each of the previous
environmental documents concluded that visual impacts associated with implementation of the proposed project
would be less than significant.
Analysis of the Proposed Modifications
The EPS site is an industrial site that includes the existing CDP facilities and the EPS buildings, smoke stack, and
ancillary facilities which are currently being demolished. New uses for the land has not yet been decided, however,
in 2017 the city of Carlsbad approved a General Plan update showing the area (except the CDP) from public utility
to tourism/commercial. Scenic vistas and scenic corridors in the City of Carlsbad that are near the proposed
modifications include the coastline views as well as the beach and coastal corridor. There are no officially
designated scenic highways in proximity to the proposed modifications or desalination plant site. Interstate Route
5 is considered to be an eligible State scenic highway and is located 0.34 mile east of the proposed modifications
(Caltrans 2022). However, due to the intervening landscape, residential structures, landforms, and the middle
lagoon, the proposed modifications would not be visible from Interstate Route 5. Additionally, the FEIR stated that
the construction and operation of the desalination plant would comply with the City of Carlsbad’s Scenic Corridor
Guidelines for portions of the desalination plant site adjacent to or within the Carlsbad Boulevard Theme Corridor
and NCTD railroad corridor. Additionally, a mitigation measure was included in the FEIR to provide for appropriate
replacement of any trees that are removed as a result of construction of the desalination plant, which reduced the
potentially significant impact to scenic resources to a less than significant level.
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The proposed modifications would include construction and operation of a DFS structure, deck structure, floating
boom and electrical building. The electrical building, is a prefabricated steel structure, approximately 500 sq. ft and
14 feet tall would be aesthetically similar to the existing electrical building and would not be visible from public
viewpoints. Although the proposed modifications would include the addition of a floating debris boom in the lagoon,
the boom would be in a limited portion of the lagoon and would not rise substantially above the existing water
surface. As a result, the floating boom would not be highly visible and would not substantially change the visual
character of the lagoon.
Visual simulations of the proposed DFS and deck structure are shown in Figures 5a and 5b. As shown in Figures
5a and 5b, the proposed DFS and deck structure are at a height and scale that is consistent if not smaller, than
surrounding structures. The majority of the structure would not be visible, as it would be located underwater. The
proposed modifications are designed with the same visual character as the existing aesthetic on the EPS site and
of the CDP.
The request represents an upgrade in overall design features and or materials and improves upon the project' s
compatibility with the surrounding neighborhood in that the project will result in the abandonment/demolition of
industrial infrastructure currently located below grade occupying 0.5 acres of coastal property. Upon completion of
the abandonment/demolition, the elevation of the abandoned/demolished property will be restored to grade to
facilitate future redevelopment of the site. In addition, features of the proposed modifications include aboveground
and underground components that will be screened and not readily seen by the public. The proposed prefabricated
electrical building would be located near the existing electrical building and would be approximately 500 square
feet and at an elevation of approximately 14 feet above grade. The above ground screening structure, deck, piping,
and electrical building will not be noticeable from Carlsbad Boulevard due to distance and intervening landscaping,
fencing, and structures. Similarly, these features would not significantly impact views from the lagoon or other parts
of the Encina Power Station property that may be redeveloped with publicly accessible uses or become accessible
to the public due to distance and security buffers, screening measures such as the paint and landscaping, and the
relatively limited area and height of the above ground structures, piping and electrical building. In addition, the
proposed modifications include demolition and removal of the existing gantry crane, thereby lowering the overall
vertical profile of the intake structure. The proposed modifications do not preclude either future on or off-site
screening. Furthermore, the request replaces any disturbed landscaping during construction.
Construction of the proposed modifications may cause short-term, temporary aesthetic impacts, including
equipment storage, materials, soil stockpiling and debris exposed to public views. In addition, a temporary trestle
would be constructed in the lagoon and may be visible from public viewpoints. However, these impacts are short-
term in nature and affect a limited industrial and commercial area. Additionally, the proposed modifications would
be required to comply with the construction staging area location and screening measures in the FEIR. As such,
they are not considered to have a substantial adverse effect on a scenic vista, nor would they substantially damage
scenic resources in the area.
During operation of the proposed modifications, occasional trips by divers would occur for DFS maintenance.
This would involve the presence of divers and marine vessels in the lagoon but would occur intermittently and
for short durations. As such, the operation and maintenance of the proposed modifications would not substantially
or permanently alter the existing visual character of the lagoon.
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Lighting would be located on the proposed DFS and deck structure. Lighting would be consistent with the existing
lighting on the intake pump station (fixture type, finish, color temperature). All lighting and controls would comply
with Title 24 requirements and would provide industry standard minimum lighting levels for security purposes.
Lighting would be provided for security purposes only, and thus would be directed on the deck structure. Mitigation
measures to control nighttime exterior lighting fixture were provided in the FEIR. All outdoor lighting fixtures would
be subject to City ordinances to reduce light pollution, glare, and nighttime sky glow. The proposed modifications
would not include large amounts of windows or other potentially reflective surfaces that could produce substantial
amounts glare. These measures would reduce potential lighting and glare impacts to surrounding areas and
nighttime views to a less than significant level.
As such, the inclusion of the proposed modifications would not result in additional impacts or increase the severity of
impacts identified in the previous environmental documents, and therefore would not change the FEIR conclusions that
aesthetic impacts would be less than significant.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to aesthetics within the previous environmental documents. Additionally, there are no substantial
changes to the circumstances under which the project will be undertaken, and no new information of substantial
importance regarding aesthetics which was not known and could not have been known when the previous
environmental documents were approved has since been identified. Therefore, the aesthetic impacts and the
proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant to
CEQA Guidelines, Sections 15162.
5.2 Air Quality
Previous Analysis
Analysis of air quality impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.2, pages 4.2-10 through 4.2-21. See also CEQA Findings, page 11.
The previous environmental documents concluded that direct impacts to air quality as a result of construction and
operation of the approved project were less than significant with incorporation of mitigation measures. However,
the FEIR findings identified that the increased electricity demand could result in a significant indirect increase in
criteria pollutants because the generation of that electricity could be achieved by fossil fueled power plants within
the San Diego Air Basin (SDAB). Similarly, the Supplemental EIR analyzed the air quality impacts from construction
and operation of onsite modifications to the existing seawater intake, including installation of new screening/fish-
friendly pumping structure, a fish return system, and auxiliary facilities. The Supplemental EIR also analyzed the
emissions from maintenance of a passive screen system by divers and from a motorized active screen system that
would require electricity to move the screens and manual cleaning by divers. Although the Supplemental EIR found
that direct impacts to air quality from construction and operation would be less than significant, the Findings of
Fact and Statement of Overriding Considerations for the Supplemental EIR determined that a considerable
cumulative contribution to air quality impacts could occur during operation of the CDP and changes described in
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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21 MAY 2022
the Supplemental EIR. This cumulative impact was determined based on the potential for indirect criteria air
pollutant emissions resulting from electricity consumption for operation of the CDP and the facilities analyzed in
the Supplemental EIR. No mitigation measures were identified that could feasibly avoid or substantially lessen this
effect.
Analysis of the Proposed Modifications
Construction
Criteria air pollutants are defined as pollutants for which federal and state governments have established ambient air
quality standards, or criteria, for outdoor concentrations to protect public health. Criteria air pollutants that are evaluated
include volatile organic compounds (VOCs), oxides of nitrogen (NOx), carbon monoxide (CO), sulfur oxides (SOx),
particulate matter with an aerodynamic diameter less than or equal to 10 microns in size (PM10), and particulate matter
with an aerodynamic diameter less than or equal to 2.5 microns in size (PM2.5). VOCs and NOx are important because
they are precursors to ozone (O3).
Similar to the previous environmental documents, the proposed modifications would result in short-term increases
in criteria air pollutant emissions during project construction. Construction of the proposed project is anticipated to
include mobilization, installation of a turbidity curtain, temporary trestle installation, prefabricated electrical
building, demolition of the marine research shed and relocation and replacement with a portable container,
replacement and relocation of the boat ramp, pile driving, intake screen structure construction, and deck structure
construction, plant shutdown, commissioning and testing, and demobilization. These construction activities would
result in the temporary addition of pollutants to the local airshed caused by on-site sources (e.g., off-road
construction equipment, marine vessels, and soil disturbance,) and off-site sources (e.g., vendor trucks, haul trucks,
and worker vehicle trips). Landside criteria air pollutant emissions from construction of the proposed changes were
estimated using the California Emissions Estimator Model (CalEEMod) Version 2020.4.0. Waterside construction
emissions were calculated using the Sacramento Metropolitan Air Quality Management District’s (SMAQMD)
Harborcraft, Dredge and Barge Emission Factor Calculator, which estimates emission rates for harbor craft engines
based on California Air Resources Board’s (CARB’s) emission estimation databases, including Barge and Dredge
Emissions Inventory database, CARB’s Crew and Supply Vessel Emissions Inventory database, and CARB’s Emission
Inventory Methodology: Appendix C for Commercial Harbor Craft Operating in California.
Construction scenario assumptions, including phasing, equipment mix, and vehicle trips, were based on information
provided by Poseidon and CalEEMod default values and are presented in Table 4. For purposes of estimating project
emissions, and based on information provided by Poseidon, it is assumed that construction of the proposed project
changes would occur over 22 months, with construction starting in 2022 and being completed by 2024.
Horsepower and load factor, as provided by Poseidon, were used for all construction equipment listed in Table 4. It
was conservatively assumed that all equipment used during each construction subphase would operate 7 days per
week. Complete construction assumptions are included in Appendix B.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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22 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
Mobilization/
Temporary
Access Driveways
for Aquafarm
14 40 10 50 Landside
Forklift 1 10 89 0.50
Small Wheel Loader 1 10 168 0.45
Excavator 1 10 45 0.45
Waterside
Workboat
1 5 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Push Knee Tugboat 1 2 350 main
79 auxiliary
0.68
main
0.43
auxiliary
Turbidity Curtain
Construction
14
40
46 165
Landside
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.20
Manlift 2 10 63 0.31
Waterside
Workboat 1 5 50 main
190 auxiliary
0.45
main
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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23 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
0.43
auxiliary
Push Knee Tugboat 1 2 350 main
79 auxiliary
0.68
main
0.43
auxiliary
Dredge-Crawler Crane 1 10 308 main
425 auxiliary
0.45
main
0.51
auxiliary
Ocean-Going Tugboat 1 2 5000 main
86 auxiliary
0.50
main
0.31
auxiliary
Survey Vessel 1 4 150 main
29 auxiliary
0.52
main
0.43
auxiliary
Dredging/
Excavation 27
Waterside
Workboat 1 9 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Push Knee Tugboat 1 2 350 main
79 auxiliary
0.68
main
0.43
auxiliary
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24 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
Dredge-Crawler Crane 1 10 308 main
425 auxiliary
0.45
main
0.51
auxiliary
Ocean-Going Tugboat 1 2 5000 main
86 auxiliary
0.50
main
0.31
auxiliary
Survey Vessel 1 4 150 main
29 auxiliary
0.52
main
0.43
auxiliary
Temporary
Access Trestle
Installation
70
40 10 3 Landside
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.20
Manlift 2 10 63 0.31
Impact Pile Hammer 1 10 221 0.50
Waterside
Workboat
1 4 50 main
190 auxiliary
0.45
main
0.43
auxiliary
77 40 10 3 Landside
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25 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
Permanent Pile
Driving
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.20
Manlift 2 10 63 0.31
Impact Pile Hammer 1 10 221 0.50
Waterside
Workboat
1 4 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Push Knee Tugboat 1 2 350 main
79 auxiliary
0.68
main
0.43
auxiliary
Rotary Drill 1 10 469 0.45
Dredge-Crawler Crane 1 10 308 main
425 auxiliary
0.45
main
0.51
auxiliary
Hydraulic Winches – Double
Drum 3 10 100 0.25
Ocean-Going Tugboat 1 2 5000 main
86 auxiliary
0.50
main
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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26 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
0.31
auxiliary
Survey Vessel 1 4 150 main
29 auxiliary
0.52
main
0.43
auxiliary
Deck Structure
Construction
69
40 14 4 Landside
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.2
Manlift 2 10 63 0.31
Waterside
Workboat
1 4 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Temporary
Access Trestle
Removal
26 40 10 3
Landside
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.2
Manlift 2 10 63 0.31
Impact Pile Hammer 1 10 221 0.50
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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27 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
Waterside
Workboat
1 4 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Construction and
Installation of
Intake Screen
Structure
45 40 10 1 Landside
Crawler Crane 1 10 231 0.29
Air Compressors 4 10 78 0.48
Generator 2 10 84 0.74
Welder 2 10 46 0.45
Forklift 1 10 89 0.20
Manlift 2 10 63 0.31
Waterside
Workboat
1 4 50 main
190 auxiliary
0.45
main
0.43
auxiliary
Install 72 Inch
Line
72 40 10 40 Landside
Drill rig 1 10 231 0.29
Hydraulic Crane 1 10 249 0.29
Excavator 1 10 345 0.45
Vault for
Bulkhead for
Intake and
Discharge Tunnel
Isolation
105 10 10 50 Landside
Hydraulic Crane 1 10 249 0.29
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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28 MAY 2022
Table 4. Construction Scenario Assumptions
Construction
Phase
Number of Days
of Construction
One-Way
Vehicle
Trips Equipment
Offroad Engine
Average
Daily
Workers
Average
Daily Vendor
Trucks
Total
Haul
Trucks Type Quantity
Usage
Hours Horsepower
Load
Factor
Plant Shutdown 25 40 10 20 Landside
Forklift 1 10 89 0.20
Excavator 1 10 345 0.45
Crane 1 10 249 0.29
Air Compressors 4 10 78 0.48
Welders 2 10 46 0.45
Demolition of
existing tunnels
108 40 10 20 Landside
Forklifts 1 10 89 0.20
Excavator 1 10 345 0.45
Skid-Steer – Track Loader 2 10 70 0.45
Aerial Lifts (electric) 2 10
Crane 1 10 249 0.29
Batch Plant 1 10 20 0.20
Demobilization 18 Landside
Forklifts 1 10 89 0.20
Notes:
See Appendix B for details.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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Table 5 shows the estimated construction criteria pollutant emissions for each year associated with the proposed
modifications. Estimated project-generated construction emissions are compared to the numeric thresholds established
in the San Diego County Guidelines for Determining Significance for Air Quality (County of San Diego 2007).1
Table 5. Estimated Maximum Daily Construction Criteria Air Pollutant Emissions
Year
VOC NOx CO SOx PM10 PM2.5
Pounds per Day
Project Modifications
2022 18.49 217.52 94.71 0.22 11.51 9.79
2023 18.26 216.86 104.59 0.27 11.34 9.74
2024 2.90 20.87 24.72 0.06 1.30 0.97
Maximum Daily
Emissions 18.49 217.52 104.59 0.27 11.51 9.79
Threshold 75 250 550 250 100 55
Threshold
Exceeded?
No No No No No No
Notes: VOC = volatile organic compound; NOx = oxides of nitrogen; CO = carbon monoxide; SOx = sulfur oxides; PM10 = coarse particulate
matter; PM2.5 = fine particulate matter
See Appendix B for complete results.
The values shown are the maximum summer or winter daily emissions results from CalEEMod. These emissions reflect CalEEMod “mitigated” output, which accounts for compliance with SDAPCD Rule 55 (Fugitive Dust Control)
(watering two times daily).
As shown in Table 5, maximum daily construction emissions would not exceed the significance thresholds
established in the San Diego County Guidelines for Determining Significance for VOCs, NOx, CO, SOx, PM10, or PM2.5
during construction in 2022, 2023 and 2024. Therefore, impacts from the proposed modifications would be less
than significant.
Operation
Operational activities associated with the new intake system would include energy for the DFS motor, large
organism exclusion device overhead debris removal monorail (if large organism exclusion device is required by a
regulatory entity), mobile crane, spray wash pumps, operations and maintenance vehicles, and maintenance work
boats. Operation of the DFS motor, large organism exclusion device overhead debris removal monorail, mobile
crane, and spray wash pumps would use electricity provided by SDG&E through the electrical grid. As a result,
operation of this equipment would not result in the direct emission of criteria air pollutants2. However, project
modifications would require the operation of maintenance vehicles and maintenance work boats that would result
1 As part of its air quality permitting process, the SDAPCD has established thresholds in Rule 20.2 requiring the preparation of
Air Quality Impact Assessments for permitted stationary sources (SDAPCD 2019). SDAPCD sets forth quantitative emission
thresholds below which a stationary source would not have a significant impact on ambient air quality. Although these trigger
levels do not generally apply to mobile sources or general land development projects, for comparative purposes these levels
may used to evaluate the increased emissions that would be discharge to the SDAB from proposed land development projects
(County of San Diego 2007). The VOC threshold is based on the threshold of significance for VOCs from the South Coast Air
Quality Management District as stated in the San Diego County Guidelines for Determining Significance.
2 Energy sources typically include emissions associated with building electricity and natural gas usage. Electricity use would
contribute indirectly to criteria air pollutant emissions; however, the emissions from electricity use are only quantified for GHGs
since criteria pollutant emissions occur at the power plant, which is off site.
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in criteria pollutant emissions. Table 6, Estimated Annual Operational Criteria Pollutant Emissions, shows the
criteria pollutant emissions estimated for project operation.
Table 6. Estimated Maximum Daily Operational Criteria Air Pollutant Emissions
Operational Year
VOC NOx CO SOx PM10 PM2.5
Pounds per Day
Project Modifications
2023 1.46 14.89 7.86 0.01 0.66 0.58
Threshold 75 250 550 250 100 55
Threshold Exceeded? No No No No No No
Notes: VOC = volatile organic compound; NOx = oxides of nitrogen; CO = carbon monoxide; SOx = sulfur oxides; PM10 = coarse particulate
matter; PM2.5 = fine particulate matter
See Appendix B for complete results.
As shown above, operation and maintenance of the proposed modifications would not exceed the County of San
Diego thresholds for criteria pollutant emissions and would result in a less than significant impact. The proposed
modifications would not substantially change the operational and maintenance criteria pollutant emissions
previously analyzed in the Sixth Addendum and would not result in a new significant impact. Therefore, the proposed
modifications would not make this previously identified cumulative impact from indirect criteria pollutant emissions
from electrical generation substantially more severe.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to air quality. Additionally, there are no substantial changes to the circumstances under which the
project will be undertaken, and no new information of substantial importance regarding air quality impacts which
was not known and could not have been known when the previous environmental documents were approved has
since been identified. Therefore, the air quality impacts and the proposed modifications do not meet the standards
for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162.
5.3 Biological Resources
This section is based upon the Section 7 and EFH Consultation for the Carlsbad Desalination Plant (CDP) Intake
and Outfall Modification.
Previous Analysis
Analysis of biological resources impacts and FEIR-identified mitigation measures of the approved project are
contained in the FEIR, Section 4.3, pages 4.3-18 through 4.3-54. See also CEQA Findings, pages 12 through 14.
The previous environmental documents concluded that no potentially significant impacts to biological resources
would occur as a result of the approved project with incorporation of mitigation measures.
The Supplemental EIR analyzed the potential for marine organism effects with the implementation of 1 mm screens,
a through-screen seawater intake velocity of 0.5 feet per second or less, fish-friendly pumps, a fish return system,
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and an increase in average annual product water from the CDP. The Supplemental EIR concluded that there would
be overall less impacts to marine organisms from entrapment, impingement, and entrainment with those changes
compared to those analyzed in the FEIR. The fish return system and other components of the intake system
analyzed in the Supplemental EIR would also disturb benthic habitat; however, these impacts were determined to
be less than significant after mitigation. The RWQCB and California Coastal Commission requirements for mitigation
that would be implemented by the Marine Life Mitigation Plan (MLMP) would mitigate for the impingement and
entrainment losses analyzed in the Supplemental EIR. The MLMP requires creation, enhancement, or restoration
of aquatic and wetland habitat, and ensured long-term performance, monitoring, and protection of the approved
mitigation.
Furthermore, the Supplemental EIR found that the brine mixing zone (BMZ), the area where the concentrated brine
would exceed salinity limits before being diluted to within 2 ppt of ambient ocean salinity, would be smaller than
the ZID analyzed in the FEIR (656-foot radius in the Supplemental EIR compared to a 1,000-foot radius in the FEIR).
Therefore, impacts were determined to be less than significant.
Under the Sixth Addendum, the approved Alternative 21 intake design would withdraw the same amount of water
that was analyzed in the Supplemental EIR using 1-mm slot width WWS arrays that are compliant with the
Desalination Amendment. Intake water would be drawn at a through-screen velocity of 0.5 feet per second or
less, the same as analyzed in the Supplemental EIR, and in compliance with the requirements of the Desalination
Amendment for minimizing impingement and entrainment. The approved Alternative 21 intake design would not
alter the seawater intake, brine discharge, and dilution water flow rates compared to the Supplemental EIR and
would therefore not result in any new impacts associated with the BMZ. The approved intake design would require
temporary disturbance of benthic habitat as a result of anchoring the derrick barge used during construction.
However, this benthic impact would be temporary and limited to the duration of construction. Approximately 0.2
acres of permanent benthic impact would result from the WWS intake arrays place on the bottom of the lagoon.
The WWS arrays and intake pipes were sited to avoid impacts to eelgrass and other sensitive habitats within the
lagoon and are located within the approved dredging footprint in the lagoon. The intake laterals would be located
within trenches in the lagoon floor that would refill with benthic sediment over time. Benthic impacts resulting
from the approved project would be mitigated through compliance with the Desalination Amendment
requirements for mitigating impacts to marine life.
The 2019 RWQCB Order requires 68.3 acres of compensatory mitigation, for the impacts on all forms of marine life
including impacts to benthic and riprap habitats.
Analysis of the Proposed Modifications
Marine Wildlife
Construction activities could result in disturbances to marine wildlife. The following federally listed species may be
impacted by the proposed modifications.
• Loggerhead sea turtle (Caretta caretta) - Endangered
• Green sea turtle (Chelonia mydas) – Threatened
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Other listed species were considered in this analysis but were eliminated based upon a variety of factors such as a lack
of occurrence in the modification area, lack of preferred habitat in the modification area, or the modification area is
outside of the species’ known range. For instance, California least tern (Sternula antillarum browni), Ridgeway’s rail
(Rallus obsoletus levipes), and western snowy plover (Charadrius alexandrinus nivosus) were considered in the analysis
but were not expected to occur at the project site and not expected to nest due to habitat requirements.
The following state listed species may be impacted by the proposed modifications:
• Garibaldi (Hypsypops rubicundus)
Loggerhead Sea Turtle
Loggerhead sea turtles are considered “Endangered” under the ESA. There are nine loggerhead turtle (Caretta
caretta) Distinct Population Segments (DPS) that have been identified globally. The population that is relevant to
the project region is the North Pacific Ocean DPS. The North Pacific Ocean DPS occurs in tropical to temperate
waters in the Pacific Ocean. Loggerhead sea turtles migrate from nesting grounds in Japan to feeding grounds
located along the west coast from central to North America. Data estimates reflect the number of females at nesting
beaches in Japan, as all loggerhead sea turtle nesting for this population occurs in Japan. The most recent available
data from 2007 indicates nearly 1,212 turtles. In the time series data from the sources listed above, it appears
that the loggerhead sea turtle population in the North Pacific Ocean decreased between 1990 and 1996/1996 but
increased between 1999/2000 and 2004/2005. The population decreased between 2004 and 2005 but appears
to be increasing between 2004/2005 and 2007. Loggerhead sea turtles can occur within tropical and temperate
waters in the Pacific Ocean, but the only documented nesting area for the North Pacific Ocean population of this
species is in Japan (NOAA Fisheries 2022). Nesting occurs mainly on open beaches or along narrow bays having
suitable sand, and often in association with other species of sea turtles. They choose ocean beaches with high
wave energy, narrow, steep slopes, and coarse-grain sand for their nests. There are no known nesting locations
that occur along the western seaboard of the U.S. or Hawaii (NMFS and USFWS 1998d). Baja California has the
largest known aggregations of loggerhead sea turtles. Migration occurs along nearshore coastal waters (neritic
zone). Loggerhead sea turtles typically feed on benthic invertebrates in hard bottom habitats, although fish and
plants are occasionally consumed (NMFS and USFWS 1998d). During ideal conditions (water temperature/break),
this species is known to migrate along the coast of California, including the Santa Barbara Channel. Sightings of
this species along the U.S. west coast typically are of juveniles measuring 20–60-centimeter shell length (NMFS
and USFWS 1998d). Loggerhead sea turtles are subject to several threats including loss of nesting habitat;
disorientation of hatchlings by beachfront lighting; degradation of foraging habitat; marine pollution and debris;
ship strikes; disease; and incidental take from commercial trawling, longline, and gill net fisheries (NMFS and
USFWS 1998d). There are no known California Natural Diversity Database (CNDDB) occurrences of loggerhead sea
turtles in the lagoon (CDFW 2022) but their habitat preference for nearshore coastal waters may place them in the
Agua Hedionda Lagoon.
Loggerhead sea turtles are endangered species, so extra precautions and Avoidance and Minimization Measures
(AMM’s) are warranted if they enter the area; however, the likelihood of these species being in the project area is
very low. Sea turtles can avoid construction impacts by swimming away from the site during construction activities.
The potential risk of injury to or mortality of any special-status species from accidental collision with construction
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vessels or spills would be low, limited due to the short-term construction duration and, if a collision or spill occurred,
would not affect the sustainability of any special-status species population.
Pursuant AMMs, a qualified biological monitor would identify special-status species if present. If construction
activities pose a threat or negative behavioral changes are observed due to construction, activities would be halted.
Any loggerhead sea turtles near the construction work areas would likely avoid or move away from the construction
work areas. With the AMMs, training in species and habitat protection would occur and persons to contact if
protected species are affected would be listed. Approved wildlife monitors will be present during all construction
conducted in the waters of the U.S. and will be located within an area in which they will have a clear view of marine
waters directly in and surrounding the action area. With implementation of AMM’s, construction impacts may
temporarily affect but is not likely to adversely affect loggerhead sea turtles.
Construction of a portion of the proposed project would involve pile driving. Pile driving activities could result in
hydroacoustic disturbance for loggerhead sea turtles. The installation of a bubble curtain and turbidity curtains,
which would be included as part of the proposed project’s features during construction in the water and would
minimize noise. Turbidity curtains also act as a visual deterrent for sea turtles, ensuring they are not within the pile
driving impact area. The bubble curtain and turbidity curtain will move with the construction and surround the
construction activity. Pile driving activities may also begin with a “ramp-up” or “soft start” to alert sea turtles of the
activity, allowing them to vacate the area, and to keep sea turtles away from the project site. In addition, pile driving
would be sequenced so that the number of piles driven per day would gradually increase over the construction
period. This would allow for any sea turtles in the area to relocate during the construction period. Per permit
conditions and regulatory requirements, the U.S. Army Corps of Engineers and NMFS may recommend construction
monitoring by a Protected Species Observer (PSO) knowledgeable of sea turtles of the East Pacific Ocean, which
would further ensure that sea turtles are not impacted. PSO’s conduct daily pre-construction surveys and monitor
during construction activities in the water to ensure that sea turtles are not present in the impact area and have
stop/start work authority to protect species.
Given identified AMMs, temporary nature of construction, and short-term duration, construction is not likely to
significantly impact loggerhead sea turtles.
Green Sea Turtle
Green sea turtle populations along the Pacific Coast of Mexico and in Florida are classified as “Endangered” under
the ESA, and all other populations are classified as “Threatened”. There are eleven green sea turtle (Chelonia
mydas) Distinct Population Segments (DPS) that have been identified globally. The Eastern Pacific DPS ranges from
Baja California to southern Alaska. However, the green sea turtle is more common from San Diego southward. This
species forages in the open ocean when migrating as well as shallow waters of lagoons, bays, estuaries, mangroves,
eelgrass, and seaweed beds. They are herbivorous and feed primarily on seagrasses and algae. Green sea turtles
are generally found in shallow waters except when migrating. It is a regular visitor in the waters off the southwest
coast of the United States. Residents occur in the San Gabriel River, Long Beach (NMFS and USFWS 1998e). The
current population estimate for green sea turtles in the East Pacific DPS was calculated from abundance estimates
at nesting sites as the total number of females counted divided by the number of years of monitoring and multiplied
by the remigration interval. The estimated total nester abundance is 20,062 turtles. Green sea turtles are most
likely to occur at known nesting sites during the nesting season. Most nesting sites occur along the coasts of Mexico,
Costa Rica, Columbia, and Ecuador with no known nesting sites in California. This species requires open beaches
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with a sloping platform and minimal disturbance for nesting. Green sea turtles have strong nesting site fidelity and
often make long distance migrations between feeding grounds and nesting beaches. Threats to the green sea turtle
include commercial harvesting, loss of nesting habitat; disorientation of hatchlings by beachfront lighting; nest
predation by native and non-native predators; degradation of foraging habitat; marine pollution and debris; ship
strikes; and incidental take from commercial fishing operations (NMFS and USFWS 1998e). Recent work off
southern California suggests juvenile green sea turtles are likely present in urbanized habitats year-round to search
for food. Adult and juvenile green turtles are generally found nearshore as well as in bays and lagoons, on reefs,
and especially in areas with seagrass beds (NOAA Fisheries 2022). There are CNDDB occurrences of green sea
turtles in the Agua Hedionda Lagoon (CDFW 2022).
Recent work off southern California suggests juvenile green sea turtles are likely present in urbanized habitats (e.g.
San Gabriel River) year-round to search for food. Green sea turtles are threatened species, so AMMs are warranted
if they enter the area; however, the likelihood of these species being in the project area is very low. Green sea
turtles can avoid construction impacts by swimming away from the site during construction activities. The potential
risk of injury to or mortality of any special-status species from accidental collision with construction vessels or spills
would be low, limited due to the short-term construction duration and, if a collision or spill occurred, would not affect
the sustainability of any special-status species population.
Pursuant to the AMMs listed above, a qualified biological monitor would identify special-status species if present.
If construction activities pose a threat or negative behavioral changes are observed due to construction, activities
would be halted. Any green sea turtles near the construction work areas would likely avoid or move away from the
construction work areas. With the AMMs, training in species and habitat protection would occur and persons to
contact if protected species are affected would be listed. Approved wildlife monitors will be present during all
construction conducted in the waters of the U.S. and will be located within an area in which they will have a clear
view of marine waters directly in and surrounding the action area. With implementation of AMMs, construction
impacts may temporarily affect but are not likely to significantly impact green sea turtles.
Construction of a portion of the proposed project would involve pile driving. Pile driving activities could result in
hydroacoustic disturbance for green sea turtles
The installation of a bubble curtain, and the turbidity curtains, which would be included as part of proposed project’s
features during construction in the water, would minimize noise. Turbidity curtains also act as a visual deterrent for
sea turtles, ensuring they are not within the pile driving impact area. Pile driving activities may also begin with a
“ramp-up” or “soft start” to alert sea turtles of the activity, allowing them to vacate the area, and to keep sea turtles
away from the project site. In addition, pile driving would be sequenced so that the number of piles driven per day
would gradually increase over the construction period. This would allow for any sea turtles in the area to relocate
during the construction period. Per permit conditions and regulatory requirements, the U.S. Army Corps of Engineers
and NMFS may recommend construction monitoring by a Protected Species Observer (PSO) knowledgeable of sea
turtles of the East Pacific Ocean, which would further ensure that sea turtles are not impacted. PSO’s conduct daily
pre-construction surveys and monitor during construction activities in the water to ensure that sea turtles are not
present in the impact area and have stop/start work authority to protect species.
Given identified AMMs, temporary nature of construction, and short-term duration, construction is not likely to
significantly impact green sea turtles.
Garibaldi
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The garibaldi, the State fish of California, is a member of the damselfish family. Garibaldi inhabit shallow rocky reef
habitats along coastal shores, semi-exposed shallow bays frequently close to the shoreline, and kelp forests.
Garibaldi will also occupy man-made structures such as rip rap. Historically, garibaldi experienced significant
population declines due to commercial harvest for the aquarium trade. This species was offered protection in 1995
when the State listed it as the Official State Marine Fish, banning any commercial harvest. Though its protected
status remains, garibaldi populations have rebounded and are reported by the California Department of Fish and
Game to be in good condition throughout their range in southern California. This species has been present in the
Lagoon, though suffered a significant die-off during a naturally occurring harmful algal bloom event in May of 2020
(Poseidon 2020). Regardless, the rip rap in Agua Hedionda provides shelter (predator avoidance) and spawning
habitat. The garibaldi spawning season is from April 1st to September 30th, when male garibaldi will defend and
maintain a nest made of red algal turf and attempt to attract and spawn with female garibaldi. During March, male
garibaldis will search for and establish a spawning area in rip rap that may be as large as 10 to15 sq ft. In order to
protect this species, pile driving and/or high-vibratory activities will occur prior to and throughout March to
discourage garibaldi from nesting in the rip rap. This would allow for pile driving and/or high-vibratory activities to
continue throughout the spawning season.
Bathymetric survey data and visual observations were used to calculate a total of 0.1 acre of rip rap habitat
permanently impacted (Poseidon and SDCWA 2022). However, as discussed below in the Essential Fish Habitat
analysis, the anticipated permanent impacts have already been mitigated under the RWQCB Order.
Given identified AMMs, and the limited and localized area impacted, no significant impacts are expected to occur
to this state protection fish species.
Marine Mammals
There are no special-status marine mammals that are expected to occur in the lagoon, however, a couple of marine
mammals protected under the federal Marine Mammal Protection Act (MMPA) of 1972, such as pinnipeds
(predominantly California sea lions (Zalophus californianus) and harbor seals (Phoca vitulina)) may be present in the
lagoon. Larger marine mammals, such as cetaceans (i.e., whales and dolphins), are not anticipated to be present in the
lagoon based on species distribution, behavior, habitat preferences, and Marine Mammal Stock Assessment Reports
(NOAA Fisheries 2022a; NOAA Fisheries 2022c). Marine mammals are highly mobile and have the ability to temporarily
avoid the project site during construction activities.
Construction of a portion of the proposed project would involve pile driving. Pile driving activities could result in
disturbance to nearby marine mammals.
Construction of the project modifications would involve pile driving. Pile driving could impact marine wildlife located in
the Lagoon, in particular hydroacoustic impacts. Installation of piles can result in indirect harm, disturbance, or injury
and/or harassment to marine wildlife which may be in the vicinity of the project during pile installation. The Marine
Mammal Protection Act (MMPA) and included in the Endangered Species Act definition of take, defines “harm” as an act
which actually kills or injures fish or wildlife. Such an act may include significant habitat modification or degradation
which actually kills or injures fish or wildlife by significantly impairing essential behavioral patterns, including, breeding,
spawning, rearing, migrating, feeding or sheltering.
Under the 1994 Amendments to the MMPA, harassment is statutorily defined as, any act of pursuit, torment, or
annoyance which--
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• (Level A Harassment) has the potential to injure a marine mammal or marine mammal stock in the wild; or,
• (Level B Harassment) has the potential to disturb a marine mammal or marine mammal stock in the wild by
causing disruption of behavioral patterns, including, but not limited to, migration, breathing, nursing, breeding,
feeding, or sheltering but which does not have the potential to injure a marine mammal or marine mammal
stock in the wild.
National Oceanic and Atmospheric Administration - Fisheries and National Marine Fisheries Service (NOAA-
Fisheries/NMFS) joined with Caltrans, other regulatory agencies and researchers to form the Fisheries Hydroacoustic
Working Group (FHWG) with the intent to provide guidance and establish criteria for the evaluation. The FHWG and NOAA-
Fisheries issued interim guidance on hydroacoustic levels resulting from pile driving activities and subsequently agreed
upon a dual metric criterion of 206 dB re: 1µPa Peak for any single strike and an accumulated cSEL of 187 dB re: 1µPa
for all fish greater than 2 grams in size. The agreed upon criteria for fish less than 2 grams lowers the accumulated cSEL
limit to 183 dB re: 1µPa. In addition, NOAA-Fisheries believes a threshold of 150 dB re: 1µPa RMS average pressure
levels for behavioral responses for salmonids and green sturgeon is appropriate, until new information indicates
otherwise.
In 2016 NOAA-Fisheries issued guidance on underwater thresholds for onset of permanent and temporary threshold
shifts for marine mammals, which was updated and incorporated in the “2018 Revision to: Technical Guidance for
Assessing the Effects of Anthropogenic Sound on Marine Mammal Hearing (Version 2.0)”. These thresholds are provided
below in Table 7. Phocid pinnipeds are earless seals and true seals, while otariid pinnipeds are eared seals (NOAA
Fisheries 2022). For this project, both otariids (California sea lion) and phocid (harbor seal) pinnipeds are anticipated
within the lagoon based on direct observations during prior marine mammal monitoring for the pilot project and dredging
within the lagoon.
The distance to the thresholds, for both fish and marine mammals was calculated based on the NMFS/Caltrans
calculation methodologies and the NOAA-Fisheries, respectively. The proposed project includes 40 temporary piles that
would be installed to support a temporary timber trestle/work structure, and approximately 114 permanent piles. The
piles would be driven into predrilled holes in the seabed with an impact hammer. It is assumed that installation of one
pile would take 1 hour and 1600 pile strikes per pile, with 6 piles that would be driven each day. The depth of the seabed
at the intake structure location is approximately 30 feet. The threshold distances for underwater exposure to fish are
provided in Table 8. The threshold distances for underwater exposure to marine mammals it provided in Table 9. These
tables indicate the distance from the construction area at which injury or disturbance occurs to both fish and marine
mammals and are used in defining the exclusion zone and safety zone for marine species monitoring for this project.
Table 7. NOAA-Fisheries Marine Mammal Protection Thresholds
Hearing Group
Cumulative SEL (cSEL) Threshold Peak Threshold
Impact Pile Driving Vibration Pile Driving Impact Pile Driving
Low-Frequency Cetaceans 183 dB 199 dB 199 dB
Mid-Frequency Cetaceans 185 dB 198 dB 198 dB
High-Frequency Cetaceans 155 dB 173 dB 173 dB
Phocid Pinnipeds 185 dB 201 dB 201 dB
Otariid Pinnipeds 203 dB 219 dB 219 dB
Source: NOAA Fisheries 2018.
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Table 8. Distance to NMFS/Caltrans Thresholds for Fish
Onset of Physical Injury Behavior
Peak Cumulative SEL dB** RMS
206 dB 187 dB Fish ≥ 2 g 183 dB Fish < 2 g 150 dB
6 m 221 m 409 m 2200 m
Source: Dudek 2022.
Table 9. Distance to NMFS/Caltrans Thresholds for Marine Mammals
Pile Type/Size
Pinniped
Injury
Cetacean
Injury
Cetacean and
Pinniped Disturbance
(Impact)
Cetacean and
Pinniped Disturbance
(Vibratory)
190 dB
RMS
180 dB
RMS 160 dB-RMS 120 dB-RMS
14-24 inch P/C
concrete <10m 10 m 215 m NA
Source: Dudek 2022.
The Level A (injury) and Level B (disturbance) threshold levels used by NOAA Fisheries, correspond to the pinniped and
cetacean injury (10 m) and disturbance (215 m) distances as shown in Table 9.
The installation of a bubble curtain and turbidity curtains, which would be included as part of the proposed project’s
features during construction in the water, would minimize noise. Turbidity curtains also act as a visual deterrent for
marine mammals, ensuring they are not within the pile driving impact area. Pile driving activities may also begin with a
“ramp-up” or “soft start” to alert marine mammals of the activity, allowing them to vacate the area, and to keep marine
mammals away from the project site. In addition, pile driving would be sequenced so that the number of piles driven per
day would gradually increase over the construction period. This would allow for wildlife in the area to relocate during the
construction period. Per permit conditions and regulatory requirements, the USACE and NMFS may recommend
construction monitoring by a Protected Species Observer (PSO) knowledgeable of marine mammals of the East
Pacific Ocean, which would further ensure that marine mammals are not impacted. PSO’s conduct daily pre-
construction surveys and monitor during construction activities in the water to ensure that marine mammals are
not present in the exclusion zone (10 m, per the Hydroacoustic Analysis), and have stop/start work authority to
protect species.
Given the temporary nature of construction and short-term duration and the implementation of the AMMs identified
below (especially the pre-construction survey, and ramp-up procedures), impacts to marine mammals, if present in the
project area, would not result in a significant impact to marine mammals.
Essential Fish Habitat
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The proposed project is located in an area designated by the Pacific Fishery Management Council as Essential Fish
Habitat (EFH) for two fishery management plans (FMPs) (NOAA Fisheries 2020b):
• Pacific Coast Groundfish (Groundfish)
• Coastal Pelagic Species (CPS)
The Pacific Fisheries Management Council has also designated Habitat Areas of Particular Concern (HAPC), a subset
of EFH (NOAA Fisheries 2019). HAPC are defined as “rare, particularly susceptible to human-induced degradation,
especially ecologically important, or located in an environmentally stressed area” (50 CFR 600.815).
Two HAPC’s are identified adjacent to the project area: Estuaries and Seagrass (NOAA Fisheries 2020b). Estuaries
provide important ecological functions, and eelgrass (Zostera spp.) is a foundation species (habitat forming) and a
nursery species for many taxa. Previous eelgrass surveys in the project area (pre-and post-dredge eelgrass surveys),
identifies an eelgrass areal extent inside the dredge limits of 470 m2 in the outer lagoon (Merkel 2018; Figure 6,
Biological Resources).
Because the project area is comprised of a sandy sediment that is abundant along the coast of southern California,
no changes to overall population abundances or behaviors are expected. No long-term effects to the project area
outside of the Agua Hedionda Lagoon – Outer Basin Maintenance Dredge and Beach Nourishment Project’s dredge
zone are expected. No impacts are expected to occur within HAPCs during the proposed project, with the
implementation of AMMs.
Most species that are covered under an FMP have a low likelihood of occurrence within the project site. Species
that are more likely to occur within the project area, principally as juveniles, include Pacific Sanddab (Groundfish),
English Sole (Groundfish), Pacific Mackerel (CPS), Northern Anchovy (CPS), Pacific Sardine (CPS), and Jacksmelt
(CPS-Ecosystem Component Species (ECS)) and Pacific Herring (CPS-ECS).
The CPS species are highly mobile and are likely capable of avoiding the construction equipment and any
disturbance caused by the construction, including hydroacoustic impacts. Their schooling behavior and highly
refined lateral line sensory systems enable rapid responses to detected disturbances, such as predators, in their
surrounding environment. These behaviors will also enable the schools of fish to avoid the project area. The more
habitat-dependent species managed under the Groundfish FMP typically occur farther offshore and in deeper
waters than the proposed project site (Love 2011).
Construction of a portion of the proposed project would involve pile driving. Pile driving activities could result in
hydroacoustic disturbance to nearby fish species.
National Oceanic and Atmospheric Administration - Fisheries and National Marine Fisheries Service (NOAA-
Fisheries/NMFS) joined with Caltrans, other regulatory agencies, and researchers to form the Fisheries
Hydroacoustic Working Group (FHWG) with the intent to provide guidance and establish criteria for pile driving
evaluation. The FHWG and NOAA-Fisheries issued interim guidance on hydroacoustic levels resulting from pile
driving activities. Distance to NMFS/Caltrans thresholds for fish was calculated and found to be 221 m (injury) for
fish greater than or equal to 2 grams, and 409 m (injury) for fish greater than 2 grams; and 2200 m (disturbance)
as shown in Table 8.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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The installation of a bubble curtain and turbidity curtains, which would be included as part of proposed project
features during construction, would minimize noise. Turbidity curtains also act as a visual deterrent for fish,
ensuring they are not within the pile driving impact area. Pile driving activities may also begin with a “ramp-up” or
“soft start” to alert marine species of the activity, allowing them to vacate the area, and to keep fish away from the
project site. In addition, pile driving would be sequenced so that the number of piles driven per day would gradually
increase over the construction period. This would allow for fish in the area to relocate during the construction period.
The project area is very small relative to the extent of the EFH for the managed species in the two FMPs. As shown
in Figure 6, the construction of the intake structure, deck, new boat ramp, and boom anchors would result in 0.2
acre of permanent benthic and rip rap impacts, which are mitigated under the RWQCB Order. Subsequently, the
potential for an adverse effect, defined as “any impact which reduces quality and/or quantity of EFH, and may
include direct (e.g., contamination or physical disruption), indirect (e.g., loss of prey or reduction in species
fecundity), site-specific or habitat-wide impacts, including individual, cumulative, or synergistic consequences of
actions” (50 CFR 600.810[a]) is highly unlikely. Therefore, the consideration of impacts to the EFH of managed
species is not required for this proposed project.
The eelgrass located adjacent to the project area but outside of the Agua Hedionda Lagoon – Outer Basin
Maintenance Dredge and Beach Nourishment Project’s dredge zone (Figure 6) could potentially be impacted by the
reduction in water quality within the immediate vicinity of the work area. Fine sedimentary particles are likely to be
suspended into the immediate water column during the cutting, excavation, and concrete placement activities. The
local environment is tidal and is regularly inundated with naturally turbid water during and following periods of
stormwater runoff from the shoreline. The eelgrass that grows in the area is unlikely to be significantly impacted in
the overall levels of turbid conditions during construction activities due to implementation of AMM’s and use of a
silt curtain. Moreover, the prior eelgrass surveys determined eelgrass extent, and, as Figure 6 illustrates, the
placement of the project will avoid any eelgrass. On this basis, no significant impact to this EFH is expected. Due to
the small extent of the project area and the implementation of the AMMs no significant impact to EFH would occur.
Conclusion
As stated previously in Section 3.3.1, the proposed modifications would not alter the CDP’s quantity or quality of
discharge. Under all operating conditions with the proposed intake design, the quantity and quality of discharge
from the CDP is the same or less than that analyzed in the previous environmental documents under the approved
project and approved under the Order. As such, the proposed modifications would not alter the seawater intake,
brine discharge, and dilution water flow rates. Therefore, the proposed modifications would not result in any new
or substantially more severe impacts associated with the BMZ.
The proposed modifications also fully comply with the Ocean Plan Amendment, meeting all of the requirements as
described in the Order with respect to potential impingement, entrapment, and entrainment of marine life. The
proposed modifications would not alter the approved through-screen velocity of less-than-or-equal-to 0.5 feet per
second and use of 1-mm slot width WWS arrays (refer to Table 3), which is the same as analyzed in the Sixth
Addendum. The proposed modifications also include a large organism exclusion device, the final design of which
would be determined in consultation with regulatory agencies. Compliance with the approved low intake velocity,
the large organism exclusion device would not result in an increased risk of entrapment. As a result, no
impingement, entrapment, or entrainment is anticipated to result from the proposed modifications.
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Based on the above analysis, the proposed modifications would not result in impacts that were not previously
identified and mitigated per previous environmental documents. With previous mitigation and implementation of
AMM’s, impacts to biological resources would be similar to those discussed in the previous environmental
documents and would remain less than significant.
General Avoidance and Minimization Measures (AMMs)
1. Prior to the start of the project, all personnel involved in the project shall be educated on the requirements
of the permits, pollution prevention measures, spill response measures, and best management practice
implementation and maintenance measures.
2. Waste shall be properly managed, stored, treated, and disposed of in accordance with applicable federal,
state, and local laws and regulations. Waste management shall be implemented to avoid or minimize
exposure of wastes to precipitation or stormwater runoff. The storage, handling, treatment, or disposal of
waste shall not create conditions of pollution, contamination, or nuisance. Upon project completion, all
debris generated from the project, building materials, excess material, waste, and trash shall be removed
from the project sites for disposal at an authorized landfill or other disposal site in compliance with federal,
state, and local laws and regulations.
3. No maintenance, storage, or fueling of heavy-tracked equipment or vehicles will occur within 50 feet of the
high tide line of waters of the United States.
4. Except for any discharge permitted under the received permits and certifications, the dumping, deposition,
or discharge of trash, rubbish, unset cement or asphalt, concrete, grout, damaged concrete or asphalt,
concrete or asphalt spoils, wash water, organic or earthen material, steel, sawdust, or other construction
debris waste from project-related activities directly into waters of the United States and/or state, or
adjacent to such waters in any manner that may permit its being transported into the waters, is prohibited.
5. All equipment shall be washed prior to transport to the project site, and shall be free of sediment, debris,
and foreign material. All equipment using gas, oil, hydraulic fluid, or other petroleum products shall be
inspected for leaks prior to use and shall be monitored for leakage. Stationary equipment shall be
positioned over drip pans or other types of containment.
6. Water containing mud, silt, or other pollutants from equipment washing or other activities, must not be
discharged to waters of the United States or state or placed in locations that may be subjected to
stormwater runoff flows.
7. Except as authorized in the required permits and Certifications, substances hazardous to aquatic life including,
but not limited to, petroleum products, unused cement, and coating material, must be prevented from
contaminating the soil and/or entering waters of the United States and/or state. Best management practices
shall be implemented to prevent such discharges during each activity involving hazardous materials.
8. Prior to commencement of the proposed project, limits of work and staging areas will be established and
clearly delineated. All work and associated construction materials/equipment will be confined to these
designated areas. No sediment, trash, discharge, or other materials will leave the work limits or associated
staging areas and enter the surrounding terrestrial or sensitive marine environment outside the project
site. Best management practices and compliance with Storm Water Pollution Prevention Plan requirements
will be implemented.
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Pre-Con Marine Surveys within the Agua Hedionda Lagoon – Outer Basin
1. A pre-construction survey of the project area for Caulerpa (Caulerpa taxifolia) shall be conducted in
accordance with the Caulerpa Control Protocol (NOAA 2008) and submitted for USACE approval. The results
of that survey shall be furnished to the USACE Regulatory Division, NOAA Fisheries, and CDFW prior to
initiation of work in navigable waters. In the event that Caulerpa is detected within the project area, the
permittee shall not commence work until such time as the infestation has been isolated, treated, and the
risk of spread is eliminated as confirmed in writing by the USACE Regulatory Division, in consultation with
NOAA Fisheries and CDFW.
2. Not earlier than 90 days nor later than 30 days prior to commencement a pre-construction eelgrass survey
outside of the Agua Hedionda Lagoon – Outer Basin Maintenance Dredge and Beach Nourishment’s dredge
zone shall be completed in accordance with the requirements of the California Eelgrass Mitigation Policy
(CEMP) by qualified biologists, prior to initiation of construction activities on the site. This survey must
include both aerial and density characterization of the beds. If eelgrass is found during the pre-construction
survey, a post-construction survey must be performed by a qualified biologist within 30 days following
project completion to quantify any unanticipated losses to eelgrass habitat. Impacts must then be
determined from a comparison of pre- and post- construction survey results. Impacts to eelgrass, if any,
must be mitigated through conformance with the CEMP, which defines the mitigation ratio and other
requirements to achieve mitigation for significant eelgrass impacts. If required following the post-
construction survey, a CEMP defined mitigation plan shall be developed; submitted and approved by the
RWQCB, USACE, and National Marine Fisheries Service; and implemented to offset losses to eelgrass.
3. Due to recent surveys indicating eelgrass presence within the Agua Hedionda Lagoon, the project shall also
comply with the following requirements:
- Prior to construction, the boundaries of adjacent eelgrass beds outside of the Agua Hedionda
Lagoon – Outer Basin Maintenance Dredge and Beach Nourishment Project’s dredge zone must
be staked with ridged PVC markers or self-centering buoys visible at all tide heights. The PVC
markers or self-centering buoys must be protected, replaced, and maintained as needed to ensure
that they remain in place and property staked at the boundaries of the eelgrass beds; and
- During construction, silt curtains must be kept a minimum of 30 feet away from staked eelgrass
beds in order to prevent damage to eelgrass beds from curtain drag or movement. Based on all of
these considerations, compensatory mitigation for the above-described impacts is not required.
- A post-construction eelgrass survey of the project area outside of the Agua Hedionda Lagoon –
Outer Basin Maintenance Dredge and Beach Nourishment Project’s dredge zone will be performed
by a qualified biologist no more than 30 days after the completion of the work to determine if any
eelgrass habitat was impacted by dredging activities.
- In the event that eelgrass habitat outside of the Agua Hedionda Lagoon – Outer Basin
Maintenance Dredge and Beach Nourishment Project’s dredge zone was impacted,
compensatory mitigation in accordance with the terms of the CEMP shall be provided.
During Construction: Marine Species AMMs
1. Pile driving and/or high-vibratory activities will occur prior to and throughout March to discourage garibaldi
from nesting in the rip rap. .
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2. Ramp-up procedures. Prior to noise-generating work in the water, a “ramp-up” procedure must be used to
increase the levels of underwater sound from noise-generating work at a gradual rate. Ramp-up procedures
will be implemented at the beginning of each workday or when pile-driving activities have ceased for more
than one hour.
3. A bubble curtain shall be deployed during pile driving. A bubble curtain is a perforated hose lying on the
seabed, positioned in a ring around the construction site, where the pile driving takes place. Air is pumped
into the perforated hose and a bubble curtain is generated. Air bubbles change the water density,
attenuating sound emissions due to pile driving.
4. A silt curtain (turbidity curtain) shall be deployed at a continuous length and maintained fully surrounding
the project site in conformance with the following requirements:
- The silt curtains shall restrict the surface visible turbidity plume or surface debris to the area of
construction and must control and contain the migration of re-suspended sediments or debris at the
water’s surface and at depth.
- The silt curtain shall be maintained as a full turbidity enclosure. Access into and out of the construction
area shall be taken by temporarily depressing and floating silt curtain and moving vessels over the
curtain allowing the curtain to rise to the surface again once vessels have crossed the curtain.
- The bottom of the silt curtains shall be weighted with ballast weights or rods affixed to the base of the
fabric to resist the natural buoyancy of the silt curtain fabric and lessen its tendency to move in
response to currents. Where feasible and applicable, the floating silt curtains shall be anchored and
deployed from the surface of the water to just above the substrate.
- The silt curtain shall be monitored for damage, dislocation, or gaps and shall be immediately repaired
where it is no longer continuous or where it has loosened.
- The silt curtain shall not be removed until the visible turbidity plume has dissipated and/or surface
debris is skimmed and removed.
5. Establishment of an underwater “exclusion zone (EZ)” and “safety zone (SZ).” The EZ is defined as the
distance where underwater sound levels exceed permanent thresholds for marine species (Level A), as
defined in the Hydroacoustic Analysis. The SZ is larger than the EZ and is defined as the distance where
underwater sound levels exceed temporary thresholds for marine species (Level B). This will be refined
based on hydroacoustic measurements in the field and in consultation with NOAA Fisheries.
6. Before any in-water work begins under the project, a qualified biologist will survey the area for any special-
status species, such as sea turtles. If any special-status species or marine mammals are observed within
the exclusion zone, project activities will not commence until the species has left the area. During work, if
a special-status species or any marine mammal is observed in the exclusion zone, the qualified biologist
will have Stop/Start Work Authority. Work will be halted until the species has left the project area.
7. Underwater noise will be measured with a hydrophone during pile-driving to verify sound levels and adjust
the size of the exclusion zone and safety zone, as necessary.
8. The on-site qualified biologist shall be designated to monitor construction activities within or adjacent to
waters of the United States and/or state (including the exclusion zone) to ensure compliance with the
permit and Certification requirements. The biologist shall be given the authority to stop all work on site if a
violation occurs or has the potential to occur and start when violations are remediated. Records and field
notes of the biologist’s activities shall be kept on site and made available to review.
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Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to biological resources within the previous environmental documents. Therefore, the biological
resources impacts, and the proposed modifications do not meet the standards for a subsequent or supplemental
EIR as provided pursuant to CEQA Guidelines, Sections 15162.
5.4 Cultural Resources
Previous Analysis
Analysis of cultural impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.4, pages 4.4-14 through 4.4-27. See also CEQA Findings, pages 14 and 15. The previous
environmental documents concluded that cultural resource impacts were less than significant with mitigation
implemented in previously undisturbed areas near known archaeological and paleontological resources sites.
The FEIR utilized a records search and literature review to determine that 30 cultural resources sites lie within
the on-site and off-site areas of the desalination plant. Two cultural sites were found to be located within the
on-site desalination plant area, neither of which were determined to be historic resources. The FEIR concluded
that impacts to historical resources were less than significant.
The FEIR concluded that the two cultural resources, CA-SDI 6751 and CA-SDI-16885, found on the desalination
plant site would be potentially impacted by construction. CA- SDI-16885 has been partially inspected and
determined to not be significant, while the significance eastern portion of CA-SDI-16885 is unknown. The
significance of CA-SI- 6751 is also unknown. The FEIR determined that while the potential for impacts is considered
low, construction activities may reveal that significant impacts could occur. Therefore, the FEIR provided mitigation
measures in the form of demolition and construction monitoring to ensure that impacts remain at a less than
significant level.
The Supplemental EIR, included outreach to local Tribes that may have tribal cultural resources that could be
affected by the improvements in and around the lagoon including the fish-friendly pump station and intake
modifications. No additional tribal cultural resources were identified as part of this process. However, it was
determined that Poseidon would provide the requesting tribes the opportunity to monitor soil stockpiles during
construction.
The FEIR determined that the site is not a known formal or informal cemetery. Due to the disturbed nature of the
site from previous excavation and fill activities the FEIR did not conclude that it is highly unlikely that human remains
are present within the development area of the CDP. However, in the unlikely event that human remains are
discovered during construction the FEIR did include mitigation measures for cultural monitoring during construction,
including procedures for actions should any human remains be discovered during construction activities. The FEIR
determined that cultural mitigation measures provided would ensure that impacts remain at a less than significant
level.
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Analysis of the Proposed Modifications
Cultural resources could be affected by ground disturbing activities that could damage or destroy surface or
subsurface resources. The proposed modifications would include dredging, excavation, and pile driving. Onshore
work would occur in previously disturbed areas or areas with existing structures. Offshore work areas would occur
in the Lagoon for placement of the proposed DFS and deck structure. However, the lagoon has been operated for
access to seawater for cooling of the EPS and HSWRI intake for decades. This has included maintenance of the
lagoon area where construction would occur by dredging lagoon bottom sediments to maintain seawater flow for
the EPS intake. As a result, the areas where offshore construction of the proposed modifications would occur are
also previously disturbed and it is unlikely that any cultural resources would exist where the DFS and deck structure
would be placed.
Mitigation in the form of cultural monitoring that was identified in the previously certified FEIR would be required
during all phases ground disturbing construction activities for the modifications. In general, the potential for
unknown cultural resources to occur within the proposed modifications site has not changed since the time of the
analysis conducted in the previously certified FEIR.
Additionally, the proposed modifications would affect a similar area that was evaluated in the Supplemental EIR for
potential tribal cultural resources. After outreach to local Tribes, no tribal cultural resources were identified in the
Supplemental EIR. However, similar to the Supplemental EIR, Poseidon would provide the requesting tribes the
opportunity to monitor soil stockpiles during construction. Therefore, the proposed modifications, which occur in a
similar area to those analyzed in the Supplemental EIR would also not result in the disturbance of tribal cultural
resources.
Therefore, no new impacts to cultural resources would result from the proposed modifications, and no cultural resources
mitigation beyond that identified in the FEIR and other previous environmental documents would be required. As a result,
implementation of proposed modifications at this location would not impact cultural. Any work conducted at this site
would also be subject to the mitigation in Section 4.4.4 of the FEIR, as applicable. Implementation of these mitigation
measures would ensure that impacts remain less than significant. Therefore, the proposed modifications would not result
in new significant impacts or increase the severity of impacts identified in the previous environmental documents, and
therefore would not change the conclusion in the previous environmental documents.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to cultural resources within the previous environmental documents. Additionally, there are no
substantial changes to the circumstances under which the project will be undertaken, and no new information of
substantial importance regarding cultural resources which was not known and could not have been known when
the previous environmental documents were approved has since been identified. Therefore, the cultural resource
impacts and the proposed modifications do not meet the standards for a subsequent or supplemental EIR as
provided pursuant to CEQA Guidelines, Sections 15162.
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5.5 Energy
Previous Analysis
Analysis of energy impacts were not considered in the FEIR or the First through Fifth Addenda. Energy impacts were
considered in the Sixth Addendum and the Supplemental EIR. Energy was officially added to Appendix G in
December 2018 with the 2019 CEQA Guideline Update.
The Supplemental EIR analyzed the increase in energy required to operate intake facilities, including a fish-friendly
pump station, and determined that it would not result in the wasteful, inefficient, or unnecessary use of energy
during operations.
Analysis of the Proposed Modifications
Implementation of the modified project would result in energy use for construction and operation, including use of
electricity, natural gas, and petroleum-based fuels. The proposed project’s impact on energy resources is discussed
separately below for construction and operation. Energy consumption (electricity, natural gas, and petroleum
consumption) was estimated using CalEEMod data from the air quality and greenhouse gas (GHG) emissions
assessment. For further detail on the assumptions and results of the energy analysis, please refer to the Appendix
B.
Construction
Electricity
Electricity consumed during project construction would vary throughout the construction period based on the
construction activities being performed. Various construction activities would require electricity, including the
conveyance of water that would be used for dust control (supply and conveyance) and electricity to power any
necessary lighting during construction, electronic equipment, or other construction activities necessitating electrical
power. Such electricity demand would be temporary, nominal, and would cease upon the completion of
construction. SDG&E is the electricity provider to the project site. Overall, construction activities associated with the
proposed project would require limited electricity consumption that would not be expected to have an adverse
impact on available SDG&E electricity supplies and infrastructure. Therefore, the use of electricity during project
construction would not be wasteful, inefficient, or unnecessary.
Natural Gas
Construction activities typically do not consume natural gas. Accordingly, there would be minimal to no natural gas
demand generated by project construction; therefore, the construction-related natural gas use would not be
wasteful, inefficient, or unnecessary.
Petroleum-Based Fuels
Petroleum-based fuel usage represents most energy consumed during construction. Petroleum fuels would be used
to power off-road construction vehicles and equipment on the project site, construction worker travel to and from
the project site, delivery and haul truck trips (e.g., hauling of material to disposal facilities), and marine vessels.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
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Fuel consumption from construction equipment and vehicles was estimated by converting the total carbon dioxide
(CO2) emissions from each construction phase to gallons using the conversion factors for CO2 to gallons of gasoline
or diesel. All off-road equipment, hauling and vendor trucks, and marine vessels are assumed to be diesel, while
worker vehicles are assumed to be gasoline. The conversion factor for gasoline is 8.78 kilograms per metric ton
CO2 per gallon, and the conversion factor for diesel is 10.21 kilograms per metric ton CO2 per gallon (The Climate
Registry 2021). The estimated diesel and gasoline fuel usage from construction equipment for the proposed
modifications are shown in Table 10.
Table 10. Estimated Construction Fuel Use
Construction
Year
Fuel Use (gallons)
Off-Road
Equipment (Diesel)
On-Road
Trucks (Diesel)
On-Road
Workers
(Gasoline)
Marine Vessels
(Diesel)
Project Modifications
2022 15,245 3,117 1,403 39,077
2023 87,914 4,758 5,005 6,103
2024 21,241 1,631 2,111 -
Total 124,400 9,506 8,519 45,181
Notes: Conversion factors from The Climate Registry (2021).
See Appendix B for complete results.
As shown in Table 10, construction of the project is anticipated to consume 8,519 gallons of gasoline and 179,087
gallons of diesel. The proposed project would be required to comply with the CARB’s Airborne Toxics Control
Measure, which restricts heavy-duty diesel vehicle idling time to 5 minutes. Furthermore, the proposed project
would be subject to CARB’s In-Use Off-Road Diesel Vehicle Regulation that requires the vehicle fleet to reduce
emissions by retiring, replacing, repowering older engines, or installing Verified Diesel Emissions Control Strategies.
Therefore, the construction-related petroleum consumption would not be wasteful, inefficient, or unnecessary.
Operational
Electricity
The proposed modifications would require electricity for multiple purposes at DFS motor, large organism exclusion
device overhead debris removal monorail, mobile crane, and spray wash pumps. Electricity consumption associated
with project operation is presented in Appendix B. The proposed project would consume approximately 233
megawatt-hours (MWh) per year during operation. For context, in 2020, California used approximately 280 billion
kilowatt-hours of electricity. Locally, in 2020, total electricity demand in San Diego County was approximately 19
billion kilowatt-hours (CEC 2022). Operational electricity use would not be wasteful, inefficient, or unnecessary.
Natural Gas
Operation of the proposed modifications would not require the use of natural gas. Therefore, operational-related
natural gas use would not be wasteful, inefficient, or unnecessary.
Petroleum
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During operations, the majority of fuel consumption resulting from the project would involve the use of maintenance
vehicles and maintenance work boats. Maintenance vehicles would include one pick-up truck traveling 20 miles
per day and one hydraulic forklift. Similar to the construction worker and truck trips, fuel consumption from these
maintenance vehicles is estimated by converting the total CO2 emissions from operation of the project to gallons
using the conversion factors for CO2 to gallons of gasoline or diesel. It is assumed that the pick-up truck would run
on gasoline, while the forklift is assumed to run on diesel. In the first year of assumed operations (2023), the
proposed project would consume approximately 261 gallons of gasoline and 10,880 gallons of diesel.
Summary
The electricity used for construction of the proposed modifications would be temporary and operational electricity
consumption would have a negligible contribution to the proposed modification’s overall energy consumption. The
proposed modifications are not anticipated to require natural gas during construction or operation. While the project
would see an increase in petroleum use during construction and operation, vehicles would use less petroleum due
to advances in fuel economy and potential reduction in vehicle miles traveled (VMT) over time. Therefore, potential
impacts associated with construction and operation would be less than significant.
Conclusion
None of the proposed modifications involve new significant impacts related to energy. Additionally, there are no
substantial changes to the circumstances under which the project will be undertaken, and no new information of
substantial importance regarding energy which was not known and could not have been known when the previous
environmental documents were approved has since been identified. Therefore, the energy impacts and the
proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant to
CEQA Guidelines, Sections 15162.
5.6 Geology and Soils
Previous Analysis
Analysis of geology/soils impacts and EIR-identified mitigation measures of the approved project are contained in
the FEIR, Section 4.5, pages 4.5-10 through 4.5-17. See also CEQA Findings, pages 15 and 16.
The previous environmental documents found that long-term impacts due to unstable soil types and seismic-related
geologic hazards would be less than significant with the identified mitigation measures incorporated. The previous
environmental documents also found that during construction activities, erosion could be accelerated, which could
undermine slopes, cause siltation of surface waters, and expose and damage underground facilities. This impact was
found to be less than significant with implementation of identified mitigation measures. Additionally, the previous
environmental documents found that impacts to mineral resources would be less than significant.
Analysis of the Proposed Modifications
A Geotechnical Design Report (Appendix C) was prepared by HDR for the proposed modifications, which considered
faulting and seismicity, liquefaction, and slope stability.
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Based on a review of existing data, surface conditions near existing shoreline at the modification area
predominantly consist of fill in the upper 15-20 feet below ground surface (bgs). The fill generally consists of silty
to clayey sand with some gravel and occasional cobbles. Borings were performed at the southern end of the lagoon
near the location of the proposed modification. In these locations, the mudline was encountered at depths of about
10 to 19 feet below sea level. From the mudline downward, approximately the upper 5 feet of soil consisted of a
medium dense clayey sand. Beneath this layer, the Santiago Formation was encountered. It is noted that the depths
to the Santiago Formation vary greatly in the project area, due to historical incision of the bedrock from stream flow
action. Based on a review of existing data, the depth to the Santiago formation generally forms a trench whose
nadir is located a few hundred feet north of the southern limit of the lagoon (Appendix C).
Like most of Southern California, the modification area is considered to be seismically active. A review of available
in-house literature indicates that there are no known active or potentially active faults that have been mapped at
the site, and the site is not located within a State of California Earthquake Fault Zone (EFZ) (formerly known as an
Alquist-Priolo Special Studies Zone). To reduce the effects of ground shaking produced by regional seismic events,
seismic design would be performed in accordance with the applicable building codes (Appendix C).
Liquefaction is the loss of soil strength or stiffness due to a buildup of pore-water pressure during ground shaking.
Liquefaction is associated primarily with loose (low density), saturated, fine- to medium-grained, cohesionless soils.
Effects of liquefaction can include sand boils, settlement, bearing capacity failures, and lateral spreading.
Seismically induced settlement consists of dry dynamic settlement (above groundwater) and liquefaction-induced
settlement (below groundwater). This settlement occurs primarily within loose to moderately dense sandy soil due
to reduction in volume during and shortly after an earthquake event. Near the proposed modification site, Santiago
Formation bedrock was encountered at shallow depth and liquefiable soil was not noted during the field
investigation. Ninyo & Moore (2016) noted liquefiable soils at some land-side locations. However, their nearest CPT
(designated as T-13) does not appear to indicate loose sands, and encounters refusal (presumably Santiago
Formation) at a depth of about 20 feet bgs. Therefore, liquefaction is not anticipated to be a major design
consideration for the proposed modification (Appendix C).
Lateral spreading is a type of landslide motion generally characterized by progressive cracking and ground motion
near a slope face. Lateral spreading is generally associated with liquefiable soils which allow the slope face and
surrounding area to flow during or shortly after earthquake ground motions. As described above, based on the
available data liquefaction is not anticipated to be a major consideration and the depth to bedrock near the
proposed modifications is relatively shallow. Therefore, lateral spreading is not anticipated to be a major design
consideration (Appendix C).
Deep, saturated layers of silts and clays which are prone to settlement issues are generally not prevalent near the
proposed modification. The modification would involve the construction on pile foundations which would derive
support from deeper relatively incompressible layers. Therefore, based on the proposed improvements and the lack
of compressible soils present, static settlement is not anticipated to be a design issue.
The proposed modifications would not result in impacts to geology and soils beyond what was originally evaluated
in the previous environmental documents and impacts would be less than significant.
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Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to geology and soils within the previous environmental documents. Additionally, there are no
substantial changes to the circumstances under which the project will be undertaken, and no new information of
substantial importance regarding geology and soils which was not known and could not have been known when the
previous environmental documents were approved has since been identified. Therefore, the geology and soils
impacts and the proposed modifications do not meet the standards for a subsequent or supplemental EIR as
provided pursuant to CEQA Guidelines, Sections 15162.
5.7 Greenhouse Gas Emissions
Previous Analysis
The Supplemental EIR evaluated GHG impacts from intake modifications including a screened intake, fish-friendly
pump system, and associated facilities. The Supplemental EIR found that these impacts would be less than
significant with mitigation.
Analysis of the Proposed Modifications
GHG are those that that absorb infrared radiation (i.e., trap heat) in the Earth’s atmosphere. As defined in California
Health and Safety Code Section 38505(g) for purposes of administering many of the state’s primary GHG emissions
reduction programs, GHGs include CO2, methane (CH4), nitrous oxide (N2O), hydrofluorocarbons, perfluorocarbons,
sulfur hexafluoride, and nitrogen trifluoride (see also CEQA Guidelines Section 15364.5). The primary GHGs that
would be emitted by project-related construction and operations include CO2, CH4, and N2O. The effect each GHG
has on climate change is measured as a combination of the mass of its emissions and the potential of a gas or
aerosol to trap heat in the atmosphere, known as its global warming potential (GWP), which varies among GHGs.
GHG emissions are typically measured in terms of metric tons (MT) of CO2 equivalent (CO2e), as presented herein.3
Construction and operation of the proposed modifications would also generate GHG emissions from operation of
construction equipment, marine vessels, motor vehicles, and for electrical generation for operations and
maintenance activities. Construction and operational details are described in Section 5.2, Air Quality.
The estimated construction GHG emissions were amortized over the estimated life of the proposed modifications
and added to the operational and maintenance GHG emissions that would result from the proposed modifications.
Table 11, Estimated Annual GHG Emissions, shows the combined amortized construction GHG emissions and
annual operational GHG emissions.
3 The CO2e for a gas is derived by multiplying the mass of the gas by the associated GWP, such that MT of CO2e = (MT of a GHG) ×
(GWP of the GHG). CalEEMod assumes that the GWP for CH4 is 25, which means that emissions of 1 MT of CH4 are equivalent to
emissions of 25 MT of CO2, and the GWP for N2O is 298, based on the Intergovernmental Panel on Climate Change’s Fourth
Assessment Report (IPCC 2007).
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Table 11. Estimated Annual GHG Emissions
Year MT CO2e Emissions
Project Modifications
Construction in 2022 602.38
Construction in 2023 1,059.54
Construction in 2024 254.53
Total 1,916.44
Amortized Construction Emissions 63.88
Annual Operational Emissions 171.21
Total Annual Emissions 235.09
Total Annual Emissions with Mitigation (Carbon Offsets) 0
Source: See Appendix B for complete results.
MT CO2e = metric tons carbon dioxide equivalent.
The Supplemental EIR determined that the previously approved project would result in 87 MTCO2eof amortized
construction emissions and 13,156 MTCO2e of annual operational emissions. The proposed modifications would
result in less construction and operational GHG emissions than what was previously estimated for the project
considered in the Supplemental EIR. Therefore, the proposed modifications would result in a less than significant
impact associated with GHG emissions.
Conclusion
The proposed modifications are consistent with the GHG Plan requirement demonstrating a “net zero” impact on
GHG emissions from indirect sources (electrical energy consumption). The approved project as revised would not
increase the severity of identified GHG emissions impacts, nor would it result in any new significant effects related
to GHG impacts that were not previously identified in the previous environmental documents. Additionally, in light
of the wide range of global warming activity prior to the certification of the FEIR in June 2006, there are no
substantial changes to the circumstances under which the proposed project will be undertaken, and no new
information of substantial importance which was not known and could not have been known when the previous
environmental documents were approved, has since been identified. Therefore, the impacts to GHG emissions from
the proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant
to CEQA Guidelines, Sections 15162.
5.8 Hazards and Hazardous Materials
Previous Analysis
Analysis of hazards impacts and EIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.6, pages 4.6-9 through 4.6-17. See also CEQA Findings, pages 16 and 17.
The previous environmental documents determined that construction would require grading and trenching that
could potentially disturb and release hazardous materials into the environment from subsurface contamination
discovered during construction. The previous environmental documents included measures to mitigate this
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potential for exposure to unanticipated contamination during construction and impacts were determined to be less
than significant.
Analysis of the Proposed Modifications
During construction, gasoline, diesel fuel, lubricating oil, grease, solvents, paint, and welding gases would
potentially be used at the proposed modifications site. The proposed modifications would implement FEIR
mitigation measures, which require preparation and implementation of a Stormwater Pollution Prevention Plan
(SWPPP) that would include both construction and post-construction pollution prevention and pollution control
measures. Additionally, as stated in the FEIR the proposed modifications would be subject to the requirements of
the NPDES permit for waste discharges and the City of Carlsbad’s Standard Urban Stormwater Management Plan.
Potential impacts related to hazards and hazardous materials during construction would be similar to the approved
project and would remain less than significant with the proposed modifications.
Construction of the proposed modifications would require additional, but similar, excavation activities as those
analyzed in the previous environmental documents. The proposed modifications site was not identified as having
contaminated soils that would be released into the environment upon excavation in the previously certified FEIR.
However, the FEIR stated that there was the potential for release or exposure of subsurface contamination during
construction at other parts of the CDP site and provided a mitigation measure to reduce this potential impact to
less than significant. The proposed modifications would be subject to the same or equivalent mitigation measures
identified in the FEIR, which would reduce potential impacts from the exposure of subsurface contamination during
construction. Therefore, impacts from the proposed modifications would be less than significant with the
incorporation of mitigation measures, consistent with the previously certified FEIR.
The proposed modifications would not result in new impacts or increase the severity of impacts previously
considered and identified in the previous environmental documents, and therefore impacts would remain less than
significant. With compliance with all applicable laws and implementation of the Water Authority’s Emergency
Response Plan, long-term impacts from hazards and hazardous materials would remain less than significant.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to hazards and hazardous materials within the previous environmental documents. Additionally,
there are no substantial changes to the circumstances under which the project will be undertaken, and no new
information of substantial importance regarding hazards and hazardous materials which was not known and could
not have been known when the previous environmental documents were approved has since been identified.
Therefore, the hazards and hazardous materials impacts and the proposed modifications do not meet the standards
for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162.
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5.9 Hydrology and Water Quality
Previous Analysis
Analysis of hydrology/water quality impacts and EIR-identified mitigation measures of the approved project are
contained in the FEIR, Section 4.7, pages 4.7-10 through 4.7-25. See also CEQA Findings, pages 17 through 20.
The previous environmental documents concluded that construction of the approved project could result in
significant short-term surface water quality impacts associated with exposed soils, fuels, lubricants, and solid and
liquid wastes that would be used and stored within active construction areas. The previous environmental
documents included measures to mitigate this potential requiring the approved project prepare a SWPPP and, if
appropriate, a Stormwater Management Plan (if grading or building permits are determined to be necessary) to
reduce water quality impacts to less than significant.
The previous environmental documents concluded that impacts to hydrology and water quality due to installation of the
offsite pipelines and associated infrastructure would be less than significant.
Analysis of the Proposed Modifications
The proposed modifications would not substantially change the salinity levels of the brine discharge or the BMZ
compared to the previous environmental documents.
Ground disturbing construction activities are not anticipated to encounter groundwater onsite. If groundwater is
encountered, it would be dewatered and project design features and mitigation measures outlined within the FEIR
would mitigate any potential impacts associated with groundwater. In addition, if groundwater is encountered on-
site, all applicable permits would be obtained. As such, impacts to groundwater would be less than significant. The
proposed modifications would not utilize groundwater resources; and would only draw surface water from
Lagoon. The proposed modifications would not result in a change in groundwater infiltration when compared to the
analysis found within the FEIR or change groundwater quality.
Construction of the proposed modifications would require excavation, which would expose soils and increase
erosion potential. During construction, turbidity curtains would be used to protect the Lagoon waters. Additionally,
material stockpiles, fuels, lubricants, and waste would be stored within the construction area. Under the proposed
modifications, the Construction Activity Storm Water Permit and other permits obtained from the RWQCB would
be changed due to the differences in construction activity as permitted under the FEIR. These changes are not
expected to be substantial. Additionally, operations of the CDP that would alter water quality or waste discharge
would not substantially change as a result of the proposed modifications, and discharge requirements established
for the desalination plant that have been imposed by the RWQCB to protect receiving waters would be adhered
to with the operation of the desalination plant’s modified intake and discharge facilities. Therefore, impacts
from the proposed modifications would be less than significant, consistent with the previously certified FEIR.
The project modifications would eliminate the intake laterals, and thus the modified project would not require pigging.
The proposed modifications to the intake design would result in a reduction of required maintenance to clean the intake
structure of marine growth when compared to the previously approved design. As noted above, debris maintenance
would require the use of a high-pressure wash spray that would be used to remove the debris from the screens
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and into a combined trough/pipeline that carries both water and debris to the discharge pond. At the end of
the trough/pipeline there would be a trash/debris sorting area that would allow trash to be removed before
brushing organic debris into the discharge pond. Portions of the floating debris boom/curtain would be
adjustable to allow for surface maintenance vessel entrance/exit to the area. The floating boom would collect
surface debris near the east and west ends of the boom. A workboat would be required to remove debris on
an as needed basis to collect and remove trash then dispose of organic debris in the discharge pond. In
addition, the large organism exclusion device would be installed between the floating debris boom/curtain
and the DFS structure to avoid impacts to marine species. Staff would operate the debris rake once or twice
a day (as needed) to remove debris off the large mammal exclusion device and drop debris into a collection
bin near the discharge pond. Trash would be removed from the bins and the remaining organic debris would
be dropped into the discharge pond Debris removal from the discharge pond would be conducted as needed and
cleaning operations/debris removal is designed to comply with the California Ocean Plan Water Quality Objectives.
Therefore, impacts to water quality during operations and maintenance would be less than significant.
The proposed modifications could result in short-term construction-related surface water impacts that would be
reduced to less-than-significant levels with implementation of mitigation measures outlined within the FEIR.
Through this mitigation, the previous environmental documents concluded that approved project’s impacts to
hydrology and water quality would be less than significant. The proposed modifications would also implement these
same mitigation measures, resulting in less than significant impacts to hydrology and water quality.
Conclusion
None of the proposed modifications or additions involve new significant impacts or a substantial increase in
previously identified impacts related to hydrology and water quality. Additionally, there are no substantial changes
to the circumstances under which the proposed project will be undertaken, and no new information of substantial
importance regarding hydrology and water quality which was not known and could not have been known when the
previous environmental documents were approved has since been identified. Therefore, the hydrology and water
quality impacts and the proposed modifications do not meet the standards for a subsequent or supplemental EIR
as provided pursuant to CEQA Guidelines, Sections 15162.
5.10 Land Use and Planning
Previous Analysis
Analysis of land use impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.8, pages 4.8-10 through 4.8-20. See also CEQA Findings, page 20.
The previous environmental documents concluded that land use impacts would be less than significant because
short-term construction related effects would not conflict with zoning or land use policies.
Analysis of the Proposed Modifications
The proposed modifications pertain to the intake system and would not change any aspect of the existing or
proposed use of the CDP site for seawater intake and discharge that was analyzed under the previous
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environmental documents. This proposed use would be a compatible use under the General Plan Land Use
designation of Utility, and Zoning designation of Public Utility. Therefore, there are no changes that would require
revisions of the previous environmental documents, no changes with respect to the circumstances under which the
project is undertaken, and no new information of importance with regards to conflicts with applicable land use
plans.
Construction of the proposed modifications could result in short-term effects to surrounding land uses, including
noise, visual effects, and dust. However, these short-term effects would not result in a land use conflicts and are
within the scope of the analysis contained in the previous environmental documents. Impacts would remain less
than significant with implementation of the proposed modifications.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to land use/planning within the previous environmental documents. Additionally, there are no
substantial changes to the circumstances under which the project will be undertaken, and no new information of
substantial importance regarding land use/planning which was not known and could not have been known when
the previous environmental documents were approved has since been identified. Therefore, the land use/planning
impacts and the proposed modifications do not meet the standards for a subsequent or supplemental EIR as
provided pursuant to CEQA Guidelines, Sections 15162.
5.11 Noise and Vibration
Previous Analysis
An analysis of noise impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.9, pages 4.9-5 through 4.9-14. See also CEQA Findings, pages 20 and 21.
The previous environmental documents indicated that all proposed project-related construction activities would
comply with the local jurisdictions’ noise ordinance for allowable construction hours. Due to compliance with
construction noise restrictions, it was anticipated that construction and operation of the CDP would not result in a
significant noise impact.
Analysis of the Proposed Modifications
Construction
Construction noise and vibration are temporary phenomena. Construction noise and vibration levels vary from hour
to hour and day to day, depending on the equipment in use, the operations performed, and the distance between
the source and receptor.
Equipment that would be in use during construction of the project modifications would include, in part, cranes,
manlifts, drill rigs, generator sets, welders, and air compressors. The typical maximum noise levels for various
pieces of construction equipment at a distance of 50 feet are presented in Table 12. Usually, construction
equipment operates in alternating cycles of full power and low power, producing average noise levels over time that
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are less than the listed maximum noise level. The average sound level of construction activity also depends on the
amount of time that the equipment operates and the intensity of construction activities during that time.
Table 12. Construction Equipment Noise Emission Levels
Equipment Description Acoustical Use Factor (%) Lmax at 50 feet (dBA, slow)1
Auger Drill Rig 20 85
Crane 16 85
Flat Bed Truck 40 84
Generator 50 82
Impact Pile Driver2 20 95
Pneumatic Tools 50 85
Source: DOT 2006; FTA 2018.
Notes: Lmax = maximum noise level; dBA = A-weighted decibels; N/A = not applicable.
1 All equipment fitted with a properly maintained and operational noise control device, per manufacturer specifications.
2 Impulsive/impact device.
Aggregate noise emissions from project modification construction activities, broken down by sequential phase, were
predicted from the geographic center of the construction site to the nearest existing noise-sensitive receptor, which
serves as the time-averaged location or geographic acoustic center of active construction equipment for the phase
under study. The acoustic center distance is used in a manner similar to the general assessment technique as
described in Federal Transit Administration (FTA) guidance for construction noise assessment (FTA 2018), when
the location of individual equipment for a given construction phase is uncertain over some extent of (or the entirety
of) the construction site area. Because of this uncertainty, all the equipment for a construction phase is assumed
to operate—on average—from the acoustic center. The acoustic center was calculated by taking the square root of
the product of the nearest distance from construction activity to the nearest noise-sensitive receptor (NSR) and the
furthest distance from construction activity to the NSR.
A noise prediction model emulating and using reference data from the Federal Highway Administration Roadway
Construction Noise Model (RCNM) (Federal Highway Administration 2008) was used to estimate construction noise
levels at the nearest occupied noise-sensitive land use. (Although the RCNM was funded and promulgated by the
Federal Highway Administration, it is often used for non-roadway projects, because the same types of construction
equipment used for roadway projects are often used for other types of construction.) Input variables for the
predictive modeling consist of the equipment type and number of each (e.g., two graders, a loader, a tractor), the
duty cycle for each piece of equipment (e.g., percentage of time within a specific time period, such as an hour, when
the equipment is expected to operate at full power or capacity and thus make noise at a level comparable to what
is presented in Table 9), and the distance from the noise-sensitive receiver. The predictive model also considers
how many hours that equipment may be on site and operating (or idling) within an established work shift.
Conservatively, no topographical or structural shielding was assumed in the modeling. The RCNM has default duty-
cycle values for the various pieces of equipment, which were derived from an extensive study of typical construction
activity patterns. Those default duty-cycle values were used for this noise analysis, which is detailed in Appendix D,
Noise Models, and produce the predicted results displayed in Table 13.
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Table 13. Predicted Construction Noise Levels
Construction Phase
Leq (dBA) at Nearest Noise-
Sensitive Receptor to the
South (Residential Receptor,
~1,700 feet)
Leq (dBA) at Nearest Noise-
Sensitive Receptor to the North
(~2,500 feet)
Mobilization/Temporary Access
Driveways for Aquafarm 53.8 50.7
Turbidity Curtain Construction 56.1 53.0
Temporary Access Trestle Installation 59.1 56.0
Permanent Pile Driving 59.1 56.0
Deck Structure Construction 56.1 53.0
Temporary Access Trestle Removal 56.1 53.0
Construction and Installation of Intake
Screen Structure 56.1 53.0
Install 72 Inch Line 52.7 49.6
Vault for Bulkhead for Intake and
Discharge Tunnel Isolation 46.2 43.1
Plant Shutdown 55.8 52.7
Demolition of existing tunnels 56.4 53.3
Demobilization 50.1 47.0
Notes: NSR = Noise Sensitive Receptor; dBA = A-weighted decibels
As presented in Table 13, the estimated construction noise levels at the nearest NSRs are predicted to range from
approximately 43.1 A-weighted decibels (dBA) equivalent sound level (Leq) and 59.1 dBA Leq. Accounting for the
man-made intervening structures present along the path between the project modifications site and the nearest
noise-sensitive receptor, construction noise levels would be further reduced by 5 to 8 decibel (dB) due to shielding
provided by the topography and intervening structures.
Based on the analysis, the modifications would not exceed the 85 dB disclosed in the previous environmental
documents, and average sound levels for an 8-hour workday would remain below 75 dB due at the nearest
residential property line. Therefore, construction noise impacts would be considered less than significant.
Construction activities could result in varying degrees of temporary groundborne vibration or noise, depending on
the specific construction equipment used and operations involved. Representative groundborne vibration levels for
various types of construction equipment, developed by FTA, are summarized in the Table 14.
A vibration limit of 0.20 in/sec peak particle velocity (PPV) will be used to minimize the potential for cosmetic
damage at buildings of normal conventional construction. With no known historical buildings in the vicinity of the
project modifications site, a significant impact would occur if nearby buildings were exposed to vibration levels in
excess of 0.20 in/sec PPV.
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Table 14. Representative Vibration Levels for Construction Equipment
Equipment
PPV at 25 feet
(in/sec)1,3
Approximate Lv
(VdB)
at 25 feet2
Pile Driver (Impact) Upper Range 1.518 112
Typical 0.644 105
Hoe Ram 0.089 87
Large Bulldozer 0.089 87
Caisson Drilling 0.089 87
Heavy-duty Trucks (Loaded) 0.076 86
Jackhammer 0.035 79
Small Bulldozer 0.003 58
Notes:
1. Where PPV is the peak particle velocity.
2. Where Lv is the RMS velocity expressed in vibration decibels (VdB), assuming a crest factor of 4.
3. Vibration levels can be approximated at other locations and distances using the above reference levels and the following
equation: PPVequip = PPVref (25/D)1.5 (in/sec); where “PPV ref” is the given value in the above table, “D” is the distance
for the equipment to the new receiver in feet.
Source: FTA 2018.
As shown in Table 14, the upper range of impact pile driving operations could generate peak particle velocities of
approximately 1.518 in/sec PPV, with heavier pieces of construction equipment, such as large bulldozers which
may be utilized for the project modifications have been documented to generate peak particle velocities of
approximately 0.089 in/sec PPV or less at a reference distance of 25 feet (FTA 2018).
Groundborne vibration attenuates rapidly, even over short distances. The attenuation of groundborne vibration as
it propagates from source to receptor through intervening soils and rock strata can be estimated with expressions
found in FTA and Caltrans guidance (Caltrans 2020). By way of example, the upper range of groundborne vibration
generated by impact pile driving activities would attenuate to an estimated vibration velocity of 0.05 in/sec per the
equation as follows (FTA 2018):
PPVrcvr = PPVref * (25/D)^1.5 = 0.05 = 1.518 * (25/250)^1.5;
where PPVrcvr is the predicted vibration velocity at the receiver position, PPVref is the reference value at 25 feet from
the vibration source (the pile driver), and D is the actual horizontal distance to the receiver.
The nearest permanent structure (the NRG Cabrillo Power building) is located 250 feet south of the project
modifications. The predicted 0.05 in/sec PPV at the nearest receiver approximately 250 feet away from the impact
pile driving activities during construction would not surpass the guidance limit of 0.20 in/sec PPV for preventing
damage to structures of normal conventional construction. Because the predicted vibration level at 250 feet is less
than the building damage risk threshold of 0.20 in/sec PPV, vibration from project conventional construction
activities is considered less than significant.
Operation
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Project modifications are expected to generate only a modest number of daily vehicle trips. Under the existing
conditions, and if considered represented by forecasts for the year 2020, roadway segments in the project
modification study area (traffic analysis zone number 813, per SANDAG TCIF) carry up to an estimated 18,512 daily
trips (SANDAG 2019). Thus, the project modification vehicle trips would represent a negligible incremental increase
in traffic volumes in the area.
Typically, a doubling of the energy of a noise source, such as a doubling of traffic volume, would increase noise
levels by 3 dBA. Under normal circumstances (non-laboratory settings), a 3-dBA increase in noise levels is
considered to be the smallest increase that is audible to the human ear; whereas a less than 3-dBA increase in
noise levels is considered to be a barely or non-audible increase. Given that it would result in only a modest increase
in traffic volumes on local roadways, the project modifications are not expected to result in an increase of 3 dBA or
greater on roadways in the study area. Therefore, impacts associated with project modification-generated traffic
noise would be less-than-significant.
The project modifications would consist of stationary operational noise sources adjacent to the existing EPS intake
tunnels. The components that have the potential to generate noise would include the continuously rotating WWS
panels contained within the DFS frames, the existing intake pump station, and personnel and maintenance vehicles
accessing the site. The nearest noise-sensitive receptors are currently exposed to traffic noise levels from Interstate
5, and Carlsbad Boulevard. Given the distance to the nearest noise-sensitive receptors and intervening natural and
man-made structures, the project modification operations and maintenance are not anticipated to generate a
significant increase in noise. As such, stationary operational noise associated with the project modifications would
be reduced to levels below ambient at the NSR and impacts would be less than significant.
Conclusion
None of the proposed modifications or additions involve new significant impacts or a substantial increase in
previously identified impacts related to noise and vibration. Additionally, there are no substantial changes to the
circumstances under which the project modifications will be undertaken, and no new information of substantial
importance regarding noise and vibration which was not known and could not have been known when the previous
environmental documents were approved has since been identified. Therefore, the noise and vibration impacts and
the proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant
to CEQA Guidelines, Sections 15162.
5.12 Transportation and Traffic
Previous Analysis
Analysis of traffic impacts and FEIR-identified mitigation measures of the approved project are contained in the
FEIR, Section 4.10, pages 4.10-4 through 4.10-13. See also CEQA Findings, pages 21 and 22.
The previous environmental documents concluded that the approved project would result in short-term construction
traffic impacts associated with the portions of the offsite pipeline to be located within existing roadways. Temporary
construction traffic trips include crew vehicles and deliveries of pipeline and other materials. The previous
environmental documents included mitigation measures requiring that construction not result in unacceptable
levels of service during peak hour periods on any affected roadways, and that specific traffic control measures as
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set forth within an approved traffic control plan are implemented. With implementation of mitigation measures,
traffic impacts were considered less than significant.
The previous environmental documents also concluded that long-term traffic impacts from inspection and
monitoring activities would be less than significant, due to the small percentages that these activities would add to
total daily traffic on affected roadways.
Analysis of the Proposed Modifications
Similar to the previous environmental documents, the proposed modifications would result in short-term
construction traffic increases. The proposed modifications would not result in additional workers at the CDP.
Construction related traffic would be temporary and are not expected to be substantial due to the limited size and
schedule for construction related activities. Additionally, construction activities would be confined to the intake
structure site location and southern extent of the outer Lagoon and would not utilize public roadways for
construction. Construction traffic due to the proposed modifications would be required to adhere to the approved
traffic control plan provided as mitigation within the FEIR to ensure minimal disruption to the level of service of
nearby roadways. Therefore, impacts from the proposed modifications would be less than significant with the
incorporation of mitigation, consistent with the previous environmental documents.
After construction, vehicle trips associated with operation of the proposed modifications would be similar to those
previously analyzed under the previous environmental documents. Furthermore, the proposed modifications would
not result in an increase in permanent staffing at the CDP that would create additional operational vehicle trips. As
such, the proposed modifications would not result in an increase in traffic on local roadways during operations and
maintenance compared to that analyzed in the previous environmental documents. Therefore, long-term impacts
to transportation and traffic would be similar to the approved project and impacts would remain less than
significant.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to transportation and traffic. Additionally, there are no substantial changes to the circumstances
under which the project will be undertaken, and no new information of substantial importance regarding
transportation and traffic which was not known and could not have been known when the previous environmental
documents were approved has since been identified. Therefore, the transportation and traffic impacts and the
proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant to
CEQA Guidelines, Sections 15162.
5.13 Public Utilities and Services Systems
Previous Analysis
Analysis of public utilities and service impacts and FEIR-identified mitigation measures of the approved project are
contained in the FEIR, Section 4.11, pages 4.11-6 through 4.11-22. See also CEQA Findings, pages 23 through 25.
The analysis of public services and utilities in the previous environmental documents concluded that the CDP and
associated infrastructure would not result in significant impacts to fire protection services, schools, wastewater
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treatment facilities, landfills, stormwater drainage facilities, or electric power services. The Supplemental EIR
analyzed the increase in energy required to operate intake facilities, including a fish-friendly pump station, and
determined that it would not result in the wasteful, inefficient, or unnecessary use of energy during operations.
Analysis of the Proposed Modifications
The proposed modifications would not result in residential, commercial, or industrial growth, and therefore, similar
to the approved project, would not require additional services or utilities. The proposed modifications are similar to
the facilities analyzed for operation in the Supplemental EIR and Sixth Addendum, including continual operation of
a fish-friendly pump station and energy used to operate the active/rotating screens. Therefore, the proposed
modifications would not result in any new significant impacts or increase the severity of impacts identified in the
previous environmental documents and would not change the conclusion that no significant impacts to public
utilities and services would occur.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in previously identified
impacts related to public utilities and services. Additionally, there are no substantial changes to the circumstances
under which the project will be undertaken, and no new information of substantial importance regarding public
utilities and services which was not known and could not have been known when the previous environmental
documents were approved has since been identified. Therefore, the public utilities and services impacts and the
proposed modifications do not meet the standards for a subsequent or supplemental EIR as provided pursuant to
CEQA Guidelines, Sections 15162.
5.14 Cumulative Impacts
Previous Analysis
Analysis of cumulative impacts and FEIR-identified mitigation measures of the approved project are contained in
the FEIR, Section 5.0, pages 5-1 through 5-13. See also CEQA Findings, pages 25 through 27.
Analysis of the Proposed Modifications
In the context of potential cumulative impacts, the proposed modifications represent a portion of the overall CDP
at a location already identified and approved for intake structure development. Furthermore, part of the approved
intake/discharge system, the fish-friendly pump station and an electrical building, has already been completed. As
such, the potential for the proposed modifications to result in cumulative considerable impacts would not
substantially differ from what was analyzed under the Sixth Addendum. Nevertheless, consistent with prior
addenda, a brief discussion of the proposed modification’s potential cumulative impacts relative to each issue area
is provided below.
Aesthetics
The proposed DFS and deck structure are at a height and scale that is consistent, if not smaller, than surrounding
structures. The majority of the structure would not be visible, as it would be located underwater. The proposed
modifications are designed with the same visual character as the existing aesthetic on the EPS site and of the CDP.
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. As such, the incremental effect of the proposed modifications on any potential significant cumulative impact would
not be cumulatively considerable.
Air Quality
The proposed modifications contribution to temporary regional or localized cumulative air quality impacts is not
considered to be significant because construction of the proposed modifications occurs over a relatively short time
period and occupies a relatively small area. This is primarily due to the short-term nature of cumulative effects
within the vicinity of the proposed modifications. Any additional cumulative development would not change these
conclusions because the scope of the cumulative development is relatively small within the context of the air basin,
and because as noted in the previous environmental documents construction-related emissions would be short-
term in nature. There would not be a substantial increase in new operational air pollutant emissions not already
considered in the previous environmental documents. Furthermore, the Findings of Fact and Statement of
Overriding Considerations for the Supplemental EIR determined that indirect criteria pollutant emissions from
electrical generation to operate the approved project would result in a cumulative impact. The proposed project’s
indirect operational emissions would be similar to those analyzed in the Supplemental EIR and would not
substantially change this previously identified cumulative impact.
Biological Resources
It is reasonable to assume that each cumulative project would comply with applicable Clean Water Act,
Endangered Species Act, Coastal Act, and other regulatory requirements designed to protect the marine biological
environment, which would minimize impacts to marine biological resources. No other cumulative projects are
anticipated to be under construction at the same time as construction of the proposed modifications. Therefore,
during construction, a cumulative impact to marine biological resources would not occur, and the proposed
modifications would not cumulatively contribute to a significant cumulative impact.
During operation of the proposed modifications, the only cumulative project that would reasonably have the
potential to substantially affect ocean water quality would be periodic maintenance dredging activities of Agua
Hedionda Lagoon – Outer Basin. No other cumulative project would result in lagoon water intake, brine discharge
to the Pacific Ocean, or other direct effects to the lagoon or Ocean. The periodic dredging involves the removal of
sediment build up from the lagoon’s outer basin, maintaining adequate depth of the lagoon to the intake tunnel
for waters to flow. Material dredged is placed on adjacent beaches and provides sand nourishment for the beach.
The dredging is a continual periodic maintenance activity that would continue with operation of the CDP with
proposed modifications and would not result in significant impacts to biological resources. Therefore, during
operation, a significant cumulative impact would not occur, and the proposed modifications would not
cumulatively contribute to a significant cumulative impact.
The proposed modifications would not result in substantial changes to the CDP such that additional cumulative
effects would occur beyond what was analyzed in the previous CEQA documents. Therefore, the CDP with
incorporation of the proposed modifications would not result in a cumulatively considerable effect on biological
resources and cumulative impacts would be less than significant.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 62 MAY 2022
Cultural Resources
The proposed modifications would implement the mitigation measures required for the approved project which
provides for avoidance, documentation, and/or recovery of important cultural resources, and as a result, all impacts
related to cultural resources are reduced to less-than-significant levels. The potential for unknown cultural
resources to occur within the proposed modifications site has not changed since the time of the analysis conducted
in the previous environmental documents. As such, the proposed modifications would not have a cumulatively
considerable contribution to a cultural resource impact. Similar mitigation measures would also be required for any
additional cumulative development, and therefore the level of potential cumulative impact would not change.
Energy
The electricity used for construction of the proposed modifications would be temporary and operational electricity
consumption would have a negligible contribution to the proposed modification’s overall energy consumption. The
proposed modifications are not anticipated to require natural gas during construction or operation. While the project
would see an increase in petroleum use during construction and operation, vehicles would use less petroleum due
to advances in fuel economy and potential reduction in VMT over time.
Cumulative projects would be required to comply with the state’s Title 24 energy performance standards and the
City’s General Plan energy conservation policies and actions. With implementation of the state and City energy code
and policies, cumulative impacts would be less than significant. Furthermore, because the proposed modifications
energy use would be rolled into the CDP’s Energy Minimization and GHG Reduction Plan, which commits to efficient
and non-wasteful use of energy, the proposed CDP modifications would not result in a cumulatively considerable
contribution.
Geology and Soils
The proposed modifications would require construction on pile foundations which would derive support from deeper
relatively incompressible layers. The proposed modifications would implement the approved project mitigation to
control and address erosion, seismic, and soils hazards such that these hazards are not exacerbated by project
development. Similar standard measures and construction practices would be required of cumulative projects,
which would reduce potential cumulative impacts to less-than-significant levels. Therefore, the proposed
modifications would not have a cumulatively considerable contribution to a geology and soils impact.
Greenhouse Gas Emissions
Global climate change is by definition a cumulative impact; a project participates in this potential impact through
its incremental contribution combined with the cumulative increase of all other sources of GHGs. Thus, GHG
impacts are recognized as exclusively cumulative impacts; there are no non-cumulative GHG emission impacts
from a climate change perspective (CAPCOA 2008). As such, cumulative impacts from GHG emissions are
discussed above in Section 5.7. As described therein, the CDP with incorporation of the proposed modifications
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 63 MAY 2022
would not have a cumulatively considerable contribution of GHG emissions and would not result in a cumulative
impact.
Hazards and Hazardous Materials
When compared to the approved project, the proposed modifications would not result in any new or substantially
more severe impacts to hazards. The proposed modifications, as well as other cumulative projects, would be subject
to existing regulatory controls and/or project-specific hazardous materials mitigation measures that would result in
minimization of hazards. Therefore, the proposed modifications would not contribute to cumulative considerable
increases in hazards or hazardous materials.
Hydrology and Water Quality
The proposed modifications would not substantially change the salinity levels of the brine discharge or the BMZ
compared to the previous environmental documents. Construction of the proposed modifications, as well as other
cumulative projects, would be subject to applicable regulations for construction pollution prevention and control.
Other cumulative projects would not contribute to project specific operational water quality issues, such as screen
cleaning and debris removal. Debris removal from the discharge pond would be conducted as needed and cleaning
operations/debris removal is designed to comply with the California Ocean Plan Water Quality Objectives. Therefore,
the proposed modifications would not result in a cumulatively considerable impact.
Land Use and Planning
The proposed modifications would not contribute to significant impacts resulting from cumulative projects that may
have the effect of dividing an established community or conflicting with land use or environmental policies. The
proposed modifications would not involve or contribute to any land use designation changes within the CDP site or
surrounding area. Furthermore, any additional cumulative projects would be subject to the existing regulations,
plans, and land use planning standards.
Noise and Vibration
The project modifications and cumulative projects would produce noise from the use of heavy equipment during
construction and the proposed refinements may be constructed at the same time as these cumulative projects. High
groundborne noise levels and other miscellaneous noise levels can be created by the operation of heavy-duty
construction equipment. Construction of the proposed modifications and nearby cumulative projects would generate
noise and would temporarily increase noise levels at nearby sensitive land uses. However, noise impacts resulting from
construction depend on the noise generated by various pieces of construction equipment, the timing and duration of
noise-generating activities, and the distance between construction noise sources and noise-sensitive receptors.
Noise generation from construction of the proposed modifications would be temporary, intermittent, and would be
less than the thresholds identified above. Construction of cumulative projects would be subject to applicable noise
regulations. Therefore, the project modifications, in combination with other cumulative projects would not result in
a cumulative impact from construction noise.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 64 MAY 2022
Transportation and Traffic
Project construction would temporarily generate construction traffic that would be subject to the approved traffic
control plan provided as mitigation within the FEIR to ensure minimal disruption of nearby roadways. Other
cumulative projects may have construction phase timing that overlap with construction of the proposed
modifications. These cumulative projects would also likely be subject to similar traffic control within affected public
roadways. Construction traffic associated with the proposed modifications would be similar to the approved project
analyzed in previous environmental documents. The proposed modifications would not result in a substantial
change to trips associated with operation of the CDP. As such, the proposed modifications would not contribute to
a traffic impact.
Public Utilities and Services Systems
The proposed modifications would not result in direct development or indirect inducement of residential,
commercial, or industrial growth, and therefore, similar to the approved project, would not require or result in the
need for additional services or utilities. Therefore, the proposed modifications would not result in a cumulatively
considerable impact.
Conclusion
None of the proposed modifications involve new significant cumulative impacts or a substantial increase in
previously identified cumulative impacts. There are no substantial changes to the circumstances under which the
project will be undertaken and no new information of substantial importance relative to cumulative impacts which
were not known and could not have been known when the previous environmental documents were approved, that
has since been identified. Therefore, the effects of additional cumulative development regarding cumulative
impacts do not meet the standards for a subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections
15162.
6 Determination
Impacts associated with the proposed modifications would not result in a new significant impact or substantial
increase in the severity of identified impacts in the previous environmental documents. There are no substantial
changes to the circumstances under which the project will be undertaken, and no new information of substantial
importance which was not known and could not have been known when the previous environmental documents
were approved, and that have since been identified. Therefore, the proposed modifications do not meet the
standards for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Section 15162 et. seq..
As such, this Seventh Addendum to the FEIR satisfies CEQA requirements for the proposed modifications described
herein.
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT / SEVENTH ADDENDUM
7662 65 MAY 2022
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Desalination Facility Intakes, Brine Discharges, and Other Non-Substantive Changes. April 24, 2015.
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Fish and Wildlife Service, Carlsbad, California. September 2006.
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alexandrinus nivosus). In 2 volumes. Sacramento, California. xiv + 751 pages. Accessed March 2022.
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population-of-the-western-snowy-plover?msclkid=da1839adb63411ec94b253e6c94b94d1
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Wildlife Service, Ventura Fish and Wildlife Office, Ventura, California. September 15. Accessed March
2022. https://ecos.fws.gov/docs/tess/species_nonpublish/2327.pdf
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WRA Environmental Consultants (WRA). 2009. SAN DIEGO REGIONAL LAGOON OVERVIEW PHASE 1 PLANNING
STUDY. I-5 North Coast Corridor Project San Diego County, California Prepared by WRA with Aecom.
Prepared for Caltrans, District 11 and San Diego Association of Governments. December 2009.
Zeiner, D.C., W.F. Laudenslayer, K.E. Mayer, and M. White, eds. 1990. California’s Wildlife: Volume II - Birds.
California Department of Fish and Game. Sacramento, California.
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Project Components
Modified Intake Boundary
FIGURE 1
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0 10050Feet
Modified Intake Boundary
FIGURE 2
Existing Fish Friendly
Pump Structure
Existing Electrical Building
72" Feeder Connection
Existing Marine
Research Building
Existing Boat Ramp
Debris Sorting
and Disposal Facility
New Boat Ramp
(Option 1)
Temporary Fish Farm
Access Ramp
New Boat Ramp
(Option 2)
Relocated Marine Research
Portable Container
Floating Boom
Floating Boom AnchorsFloating Boom Anchors
Electrical Building
Demolition/Abandonment
of 72" Feeder Connection
Demolition/Abandonment of
Intake Tunnels, Discharge
Tunnel and Forebay
Fine Screening Facility Including
Screening Equipment and Deck Access
Discharge
Pond
Baffle WaWalls (Below)
Baffle Walls (Below)
Project Structures
Connection Between Intake and Debris Sorting Facility
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Project Structures
FIGURE 6
Floating Boom AnchorsFloating Boom Anchors
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Debris Sorting and
Disposal Facility
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Floating Boom
New Boat Ramp
(Option 2)
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Existing Electric Building
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Existing Fish Friendly
Pump Structure
Fine Screening Facility Including
Screening Equipment and Deck Access
Discharge
Pond
Baffle Walls (Below)Baffle Walls (Below)Baffle Walls (Below)
Connection Between Intake
and Debris Sorting Facility
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Proposed Lagoon Impact
Benthic Impact
Riprap Impact
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Appendix A
Order R9-2019-0003 - Revisions to Design of New
Intake Structure for the Carlsbad Desalination Plant
Poseidon Resources (Channelside) LP San Diego County Water Authority
December 22, 2021
David Gibson
Executive Officer
California Regional Water Quality Control Board, San Diego Region
2375 Northside Drive, Suite 100
San Diego, CA 92108-2700
Subject: Order R9-2019-0003 - Revisions to Design of New Intake Structure for the
Carlsbad Desalination Plant
Dear Mr. Gibson:
San Diego Regional Water Quality Control Board (San Diego Water Board) Order No. R9-2019-0003 as amended by Order R9-2020-0004 (NPDES No. CA0109223) (hereafter the Order) establishes requirements for the discharge of reverse osmosis concentrate and pretreatment backwash flows from the Carlsbad Desalination Project (CDP) into the
Pacific Ocean and implements the Water Code section 13142.5(b) determination (Water
Code Determination) for stand-alone operations of the CDP in accordance with the Water
Quality Control Plan for Ocean Waters of California, California Ocean Plan (Ocean Plan).
In March 2021, Poseidon Resources (Channelside) LP (Poseidon) and the San Diego County Water Authority (Water Authority) initiated discussions with staff from the San Diego Water Board and the State Water Resources Control Board (collectively, Water
Board Staff) regarding feasibility concerns associated with the new intake structure
described in the Order (Alternative 21 Intake Design) and proposed modifications to the design of the new intake structure to address these concerns (Modified Intake Design1). Poseidon, the Water Authority, and Water Board Staff exchanged correspondence on this matter in the Spring of 2021, and reconvened as a group on September 29, 2021, to discuss
further refinements to the proposed modifications to the new intake structure design to
address the Water Board Staff’s comments. At the conclusion of the September 29 meeting, Water Board Staff recommended Poseidon apply for an amendment to the Order to modify the description of the design of the new intake structure in line with the Modified Intake Design discussed with Water Board Staff. This application to amend the Order is in
response to the guidance received from the Water Board Staff.
1 The Modified Intake Design refers to the proposed intake design that Poseidon and Water Board Staff
previously referred to as the Alternative 22 Intake Design during meetings earlier in 2021.
Carlsbad Desalination Plant New Intake Structure Design
Page 2
December 22, 2021
Poseidon Resources (Channelside) LP San Diego County Water Authority
This application to modify the design of the new intake structure is being submitted
electronically in Portable Document Format (PDF) in accordance with the San Diego
Water Board policies that encourage paperless submittal. Enclosed with this application is Appendix KKK which provides a description of the design of the modified intake structure and potential marine life impacts of the Modified Intake Design.
Alternative 21 Intake Design Feasibility Concerns. The feasibility concerns associated
with the Alternative 21 Intake Design became clear after the adoption of the Order. Poseidon completed construction of the new dilution water intake pump station in June 2020, which marked the transition from co-located operation with the Encina Power Station (EPS) to stand-alone operation for the CDP. Along with this transition, the CDP stopped receiving chlorinated seawater from the EPS cooling water pumps. The elimination of
chlorine dosing upstream of the CDP intake led to a sudden and unforeseen significant increase in the buildup of marine growth in the existing CDP intake pipeline. A key feature of the Alternative 21 Intake Design is that the intake screens are in Agua Hedionda Lagoon nine hundred feet north of the existing intake. The screened seawater
would be transported to shore in four large diameter pipelines. The inclusion of these pipelines in the intake design would significantly increase the intake area exposed to marine growth. The plant downtime required to clean this expanded intake area and remove the accumulated marine growth makes the Alternative 21 Intake Design infeasible.
The CDP operated in conjunction with the EPS for four years. During this time, less than one inch of marine growth was observed in the CDP intake pipeline. After the CDP began operating independent of the EPS cooling water pumps and seawater chlorination was discontinued, there was a rapid increase in marine growth in the CDP intake pipeline. Within ten months following the transition to stand-alone operations, the marine growth
on the lining of the pipeline supplying seawater to the CDP intake pump station had increased to the point where water production was constrained. Upon inspection, it was determined that in the first ten months of stand-alone operation, the thickness of the marine growth on the lining of the 72-inch diameter CDP intake
pipeline increased from less than one inch to over six inches in some locations. Divers were deployed to remove the marine growth. After 5 days of cleaning (requiring the CDP to be off-line), the dive crew removed approximately 1,600 cubic feet of accumulated marine growth from the first 200 feet of the 280 foot-long intake pipeline (see Appendix KKK, Figure 1). However, residual turbidity in the intake prevented the CDP from
resuming operations for another two days, thereby extending the maintenance outage to a full week.
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Based on this experience, Poseidon estimates that the intake pipelines associated with the
Alternative 21 Intake Design2 would need to be cleaned approximately every three to six
months to keep the marine growth from constraining water production. An estimated 30,000 cubic feet of marine growth would need to be removed from the pipelines annually and disposed. The CDP would not be able to operate while the pipeline cleaning is underway and water production would not resume until the residual debris is removed and
the turbidity in the intake is in compliance with the CDP operating permits.3 The expected
downtime for pipeline cleaning, removal of the accumulated marine growth, and stabilization of the intake water quality would halt water production and delivery an estimated two months each year.
The CDP is a critical component of San Diego County’s water infrastructure. The Water
Authority is counting on this locally controlled, drought-proof source of water from the Pacific Ocean to meet ten percent of the water demand in its service area. Except for scheduled outages of up to 350 hours per year for maintenance, repair, and replacement of equipment, the Water Authority relies on the CDP to be available for full production of up
to 54 million gallons per day (MGD). The duration of the maintenance outage required for
the Alternative 21 Intake Design alone would be four times longer than the total annual allowance for scheduled maintenance of the entire CDP under the project contracts, thereby preventing Poseidon from meeting its water delivery and debt financing covenants.4
While Poseidon did not fully appreciate the speed that marine growth would form within the intake pipelines prior to March 2021, the Order acknowledged that there may be challenges associated with the Alternative 21 Intake Design. During the development of
the Order, Poseidon and the San Diego Water Board discussed how the cleaning of the intake laterals creates challenges associated with debris management and meeting the terms of the Water Purchase Agreement addressing allowable plant downtime for maintenance.5 The San Diego Water Board acknowledged that detailed information was not yet available to determine the frequency of pipeline cleanings, volumes of flush water that would be
generated, the characteristics and volumes of debris that would be produced and the method
2 The Alternative 21 Intake Design includes four intake pipelines approximately 72-inch in diameter,
which extend 900 feet offshore, for a total of 3,600 linear feet of additional intake piping.
3 The Drinking Water Permit issued to the CDP by the State Water Resources Control Board prohibits
plant production if the intake turbidity is greater than 24 NTU and the Order prohibit discharges to the
Pacific Ocean that cause aesthetically undesirable discoloration of the ocean surface.
4 See May 25, 2021 letter to the San Diego Water Board for further details regarding Poseidon and the
Water Authority’s investigation into the operational reliability issues associated with Alternative 21 Intake
Design.
5 Order at H.2-16.
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of debris disposal for the Alternative 21 Intake Design.6 The San Diego Water Board noted
that these issues would need to be further investigated by Poseidon and the results
incorporated into the final design of the intake structure.7 Since the adoption of the Order, Poseidon and the Water Authority have thoroughly investigated the operational reliability issues associated with the Alternative 21 Intake
Design, analyzed alternatives to overcome these issues, and incorporated the results of this
investigation in the modified design of the new intake structure described below. Alternatives considered to overcome the challenges associated with the Alternative 21 Intake Design included the addition of a chlorine feed system8 to the Alternative 21 Intake Design to control marine growth as well as further consideration of five of the design
alternatives previously proposed by Poseidon and considered by the San Diego Water
Board in the 2019 Water Code Determination. The results of the alternatives analysis are presented in Table 1. The conclusion of this investigation is that the Modified Intake Design offers the best available design and technology feasible to minimize the intake and mortality of marine life.
Table 1
Results of Intake Design Alternatives Analysis
Design
Alternative
Intake Design
Description
Intake Screen
Location
Feasible Feasibility Concerns
21 (with chlorination) Wedgewire Screen with Hypochlorite Feed System
Offshore in Lagoon No
Extension of a hypochlorite feed system 900 feet into Aqua Hedionda Lagoon presents a risk of a chlorine spill in a sensitive estuarine environment that could adversely impact native marine organisms and adjacent aquaculture operations.
Proposed Modified Intake Alternative
Traveling Screens Lagoon Shoreline at EPS Intake
Yes None.
11, 12, 13, 14 Traveling Screens Lagoon Shoreline at Discharge Pond
No These intake designs were previously considered by the Regional Board as part of the 2019 Order. However, this intake screen location is incompatible with the configuration of the newly-constructed dilution water intake pumps.
6 Order at H.2-17.
7 Id.
8 Chlorine dosing (both continued chlorine addition and shock dosing) was evaluated as a potential chemical control for biofouling in the pipelines but was eliminated from further consideration due to risk associated with a spill of chlorine in the Lagoon which could affect both ambient organisms and those raised at the adjacent shellfish aquaculture facility.
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Proposed Modifications to the New Intake Structure. The Modified Intake Design
contemplates moving the new intake structure closer to the shore, eliminating the intake
pipelines, and using dual flow traveling screens that provide for debris removal and screen maintenance from the shore (see Appendix KKK for a discussion of the use of dual flow traveling screens in lieu of wedgewire screens). The Modified Intake Design is anticipated to include a mammal and turtle exclusion device and a floating debris boom upstream of
the dual flow traveling screens. This intake design is similar to other traveling screen intake
designs that the San Diego Water Board previously found to be compliant with the Ocean Plan’s criteria for 0.5 ft/sec intake velocity when applied at the onset of the intake.9 These modifications are necessary to address operational reliability challenges associated with the Alternative 21 Intake Design. Other than these changes, the Modified Intake Design
fully complies with the Intake Specifications described in section IV.C of the Order (Table
2).
Table 2
Intake Specifications (Section IV.C of the Order)
Proposed Change
The intake of seawater from Agua Hedionda Lagoon shall comply with these specifications following completion of the new intake structure in accordance with the time schedule described in section VI.C.7 of this Order and Attachment H of the Order:
1. The new intake structure shall be completely constructed and operable in accordance with the requirements of this Order; Revise description of the new intake structure in Attachment H of the Order to reflect Modified Intake Design.
2. The intake of seawater must not exceed 330 MGD with the existing intake pumps and 299 MGD with the new intake pumps;
No change.
3. Surface water intakes must be screened at the onset of the intake of seawater. Screens must be functional while the Facility is withdrawing seawater;
No change.
4. To reduce entrainment, all surface water intakes must be screened with a 1.0 mm (0.04 in.) or smaller slot size screen when the Facility is withdrawing seawater;
No change.
5. To minimize impingement, the through-screen velocity at the onset of the surface water intake must not exceed 0.15 meters per second (0.5 feet per second) at all times;
No change.
6. The intake of seawater shall be reduced to the minimum volume necessary to maintain Facility operations; No change.
9 Order at H.2-5.
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7. To the maximum extent practicable, in-plant recycling of waste streams shall be maximized before intaking additional seawater;
No change.
8. The Discharger shall cease intake of seawater except when intake of seawater is necessary to maintain Facility operations or to comply with this Order;
No change.
9. Heat treatment of the intake system is prohibited; and No change.
10. Pump operations for intake of seawater with the new intake pumps shall minimize abrupt changes in flow velocity. No change.
Modified Intake Design. The modified intake structure would be located in Agua
Hedionda Lagoon approximately 30 feet north of the existing EPS intake and is anticipated to include a floating debris boom, mammal and turtle exclusion device, and partially submerged travelling screens. After passing through the intake screens, the screened seawater would flow into the existing EPS intake to the existing CDP intake and fish-
friendly brine dilution pump station. Under all operating conditions, the quantity and
quality of the CDP intake and discharge are unchanged from that described in the Order:
• The maximum daily intake flow is 299 MGD;
• The maximum daily combined discharge flow is 67 MGD;
• The maximum salinity in the discharge pond after mixing with the dilution water from the flow augmentation system is 42 parts per thousand (ppt); and
• The maximum salinity in the Pacific Ocean is less than or equal to 2 ppt over natural background salinity measured at the edge of the brine mixing zone 200 meters (656
feet) away from the point of discharge.
The intake structure would have a maximum intake capacity of approximately 299 MGD. The intake screens would have 1.0 mm slot widths and a through-screen velocity of 0.5 feet per second or less (including 15% screen occlusion) with one screen out of service as needed for maintenance, repair, or replacement.
Similar to the Alternative 21 Intake Design, a floating debris/boom curtain will be installed in front of the intake screens to block floating debris from entering the screening structure. The floating debris boom would extend below the surface of the water and would be anchored to a riser that would allow the debris boom to rise and fall freely with tidal
fluctuations. The intake structure would include baffle walls to direct the seawater through the dual flow screening system and into the existing intake tunnels with a deck above the water level for
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equipment and personnel access for maintenance and inspections. All mechanical drives
and electrical components will be above water.
The 1.0 mm screen panels rotate within a vertical steel frame. The water being screened would pass through the dual flow screens from the outside of the screen to the inside of the frame, then out through the back to the existing EPS intake. As the screen panels descend,
debris removed by the screens is washed into a trough using screened seawater. After
flushing the debris from the screens, the wash water then flows to the discharge pond where it contributes to the flow required for brine dilution without increasing the total intake flow required for CDP operations.
See Appendix KKK for a detailed description of the proposed modifications to the intake
design. Implementation of the Modified Intake Design will significantly reduce the use of divers in comparison to the Alternative 21 Intake Design. Divers would only be required for
occasional inspection of the submerged components of the Modified Intake Design. In
comparison, divers would be required for all maintenance tasks, routine or emergency, for the Alternative 21 Intake Design.
Potential Marine Life Impacts of the Modified Intake Design. Table 3 provides a summary of the criteria considered by the San Diego Water Board in the 2019 Water Code
Determination to establish the intake and mortality of all forms of marine life for the
Alternative 21 Intake Design alongside that of the proposed Modified Intake Design.
For each of the criteria considered (intake flow, intake velocity, size of the brine mixing zone, discharge concentration, screen size, and construction impacts) both intake alternatives rank the same. The proposed modifications in the design and operation of the
intake structure would not result in increased intake or mortality of marine life beyond what
was originally approved in the Order. As such, the Modified Intake Design does not constitute an “expanded facility” as that term is defined in the Ocean Plan.10 Therefore, the Modified Intake Design does not require a new Water Code determination.
10 The Ocean Plan defines “expanded facilities” as “existing facilities for which . . . the owner or operator
does either of the following in a manner that could increase intake or mortality of all forms of marine life
beyond that which was originally approved in any NPDES permit or Water Code section 13142.5,
subdivision (b) . . . determination: 1) increases the amount of seawater used either exclusively by the
facility or used by the facility in conjunction with other facilities or uses, or 2) changes the design or
operation of the facility.” (Ocean Plan, section III.M.1.b.(2).) As demonstrated in Appendix KKK, the
Modified Intake Design would not increase the amount of seawater used or change the design or operation
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See Appendix KKK for a detailed evaluation of the potential marine life impacts of the
Modified Intake Design.11
Table 3
Comparison of 2019 Water Code Determination Criteria
Alternative 21 Intake Design (as
approved in the Order) Modified Intake Design
Intake Flow Rate
(MGD) 299 No change
Brine Mixing Zone
(Acres) 18.5 No change
Brine Mixing Zone
Salinity
The maximum salinity in the discharge pond is 42 ppt; and the maximum salinity at the edge of the brine mixing zone is 2 ppt over natural background salinity.
No change
Screen
Technology 1.0 mm cylindrical screens 1.0 mm travelling screens
Through-Screen
Velocity <0.5 fps1 No change
Permanent
Construction
Impacts
0.2 acre No change
of the CDP in a manner that increases the intake or mortality of marine life beyond that which was
approved in the Order.
11 In addition, pursuant to Section VI.C.2.a of the Order, Poseidon is in the process of preparing a multiport
diffuser analysis that it intends to submit to the San Diego Water Board prior to the March 18, 2022 deadline. This analysis will provide additional information regarding intake and mortality to all forms of marine life for purposes of comparing a theoretical multiport diffuser in the Pacific Ocean and flow augmentation. While the preliminary data remains under technical review, preliminary results indicate that intake and mortality to all forms of marine life associated with an intake in the outer lagoon will be less than that assumed in the Order and less than that of a theoretical multiport diffuser in the Pacific Ocean.
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Method of
conveyance of
screened water to
shore
4 intake laterals 1 common intake forebay
Location of intake
screens ~900’ offshore ~30’ offshore
Cleaning regime
for screened water
conveyance
system
Manual cleaning of ~3,600 linear
feet of intake laterals multiple
times a year
No cleaning required due to size of
forebay
Would the design
or operation
change result in
increased impacts
to the marine
environment?
No No
Does the design or
operation change
constitute a facility
expansion within
the meaning of the
Ocean Plan?
No No
Based on the two
above findings,
does the design or
operation change
require a new
Water Code
Determination?
No No
Schedule Considerations. The Order includes a compliance schedule (Compliance Schedule)
with seven tasks to be completed to achieve compliance with the Ocean Plan, Water Code Determination, and the Order. Poseidon is required to complete the tasks by the date specified, culminating with achieving full compliance no later than December 11, 2023. Table 4 contains a
copy of the Compliance Schedule along with of status of completion of each of the seven tasks.
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Table 4
Compliance Schedule for Design and Construction of New Intake Structure
Task Compliance Date Status
1. Submit to the San Diego Water Board a Construction Work Plan outlining in detail the steps and schedule with specific milestones to construct the new intake structure.
September 30, 2019 Complete
2. Complete construction and begin operation of the new dilution water intake pumps. June 30, 2020 Complete
3. Completion of 30% design of the new intake structure in conformance with the Water Code section 13142.5(b) Determination in Attachment H of this Order and select contractor for construction of new intake structure.
June 30, 2022
Pending
4. Secure necessary permits to construct the
new intake system. This may include but is not limited to: California Coastal Commission Coastal Development Permit, and Army Corps of Engineers CWA 404 Permit, and San Diego Water Board 401 Water Quality Certification. Additional permits or approvals may be necessary that are not listed here.
December 31, 2022
Pending
5. Begin construction of the new intake structure. January 15, 2023 Pending
6. Complete construction and begin operation of the new intake structure. September 1, 2023 Pending
7. Achieve full compliance with the Ocean Plan, Water Code section 13142.5 (b) Determination for the Facility and Intake Specifications in section IV.C of this Order.
December 11, 2023 Pending
Included below is a discussion of the status of completion of the Compliance Schedule
tasks and expected timeline to achieve full compliance.
• Compliance Schedule Task 1. Compliance Schedule Task 1 requires Poseidon to submit to the San Diego Water Board a Construction Work Plan outlining in detail the steps and schedule with specific milestones to construct the new intake
structure by September 30, 2019. Poseidon submitted the Construction Work Plan for the Alternative 21 Intake Design to the San Diego Water Board on September 26, 2019. Poseidon will submit an updated Construction Work Plan reflecting the Modified Intake Design within 60 days of the San Diego Water Board’s adoption of the amendment to the Order.
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• Compliance Schedule Task 2. Compliance Schedule Task 2 requires Poseidon to complete construction and begin operations under Interim Stand-Alone Operations using new dilution water intake pumps by June 30, 2020. Poseidon completed construction of the dilution water intake pumps and began Interim
Stand-Alone Operations on June 20, 2020. The San Diego Water Board Staff
inspected the Interim Stand-Alone Operations using new dilution water intake pumps on November 3, 2020 and confirmed that the new dilution water intake pump station was compliant with the Order.12 The proposed modifications to the new intake structure do not result in any changes to the design or operation of the dilution water intake pump station.
• Compliance Schedule Task 3. Task 3 of the Compliance Schedule requires Poseidon to complete the 30% design of the new intake structure and select the construction contractor by June 30, 2022. Poseidon expects to complete the 30%
design of the Modified Intake Design and select a construction contractor in parallel with the San Diego Water Board’s consideration of this request to modify the design and operation of the new intake structure. While less than ideal, this “at risk” approach to complete the 30% design and select the contractor for construction of the modified intake structure is necessary to ensure timely compliance with other
elements of the Compliance Schedule. For example, Task 6 of the Compliance Schedule specifies September 1, 2023 as the date for Poseidon to complete construction and begin operation of the new intake structure. To achieve this outcome, the purchase order for the intake screens must be issued early in the second quarter of 2022, which is earlier than the screen procurement timeline
contemplated when the Order was adopted 2019. Prospective intake screen vendors have advised Poseidon that supply chain disruption stemming from the COVID-19 pandemic has significantly increased the timeframe to supply the specialty dual flow screens. Manufacturers are now stating that the time required to deliver the dual flow screens to the site is at least 12 months after placement of the order, and
similar delays have been communicated regarding wedgewire screens as well. Prior to issuing the purchase order for the screens, Poseidon must advance the design of intake system to a sufficient level to finalize dimensional and support requirements for the dual flow screens. Thus, to stay on track with the Compliance Schedule, Poseidon respectfully requests that the San Diego Water Board adopt the amended
Order by the end of the first quarter 2022 to enable Poseidon to place the order for
the dual flow screens.
12 State Water Resources Control Board NPDES Compliance Evaluation dated December 2, 2020.
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• Compliance Schedule Task 4. Task 4 of the Compliance Schedule requires
Poseidon to secure necessary permits to construct the Modified Intake Design by December 31, 2022. Table 5 provides a list of the key permits, permitting authorities, and status of the permitting of the Modified Intake Design. The Water Authority is the lead agency for the California Environmental Quality Act
(CEQA) review of the Modified Intake Design. The Water Authority is currently
evaluating the potential environmental effects resulting from the construction and operation of the Modified Intake Design and expects to complete the CEQA review and required documentation in early 2022. Applications for the remaining permits listed in Table 5 will be submitted to the responsible permitting authorities following adoption of the amended Order. This will ensure that the project
described in the applications is aligned with that approved by the San Diego Water Board. Poseidon will initiate discussions with the other permitting authorities and finalize the applications for the other permits in anticipation of San Diego Water Board adoption of an amended Order authorizing construction and operation of the Modified Intake Design by the end of the first quarter 2022.
Table 5
Permits Required to Construct the New Intake Structure
Permit Permitting
Authority
Status
CEQA Compliance Water Authority In Progress Amend provisions of the Order governing the design and operation of the new intake structure
San Diego Water Board Application Submitted
Precise Development Permit Amendment City of Carlsbad Prepare Application and Consult with Agency Staff Q1 2022, Submit Application after Adoption of Amended Order
Coastal Development Permit Amendment California Coastal Commission
Prepare Application and Consult with Agency Staff Q1 2022, Submit Application after Adoption of Amended Order Clean Water Act Section 404 Dredge and Fill Permit Army Corps of Engineers Prepare Application and Consult with Agency Staff Q1 2022, Submit Application after Adoption of Amended Order
Clean Water Act Section 401 Water Quality Certification San Diego Water Board Prepare Application and Consult with Agency Staff Q1 2022, Submit Application after Adoption of Amended Order Endangered Species Act and Marine Mammal Protection Act Incidental Take Permit or Waiver
National Marine Fisheries Service
Prepare Application and Consult with Agency Staff Q1 2022, Submit Application after Adoption of Amended Order
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• Compliance Schedule Task 5. Task 5 of the Compliance Schedule requires Poseidon to begin construction of the new intake structure by January 15, 2023. The construction timeframe for the Modified Intake Design is estimated to be longer than the timeframe for Alternative 21. Alternative 21 allowed for a
substantial part of the construction to be prefabricated and then placed into its final
position in the lagoon using floating equipment. The Modified Intake Design, on the other hand, requires that supports for the dual flow screens and the above water decking be constructed over the water in the lagoon, which will avoid the need for an extended shut down of the CDP. Based on recommendations from Poseidon’s contractors and engineers, construction should start by September of 2022.
Poseidon’s ability to start construction within the designated timeframe is dependent on timely completion of Tasks 3 and 4. As noted above, timely completion of Tasks 3 and 4 is contingent on adoption of the amended Order with sufficient time for Poseidon to place the order for the dual flow screens, as described in Task 3.
• Compliance Schedule Task 6. Task 6 of the Compliance Schedule requires Poseidon to complete construction and begin operation of the new intake structure by September 1, 2023. Poseidon’s ability to complete this task by September 1,
2023 is dependent on timely completion of Tasks 3 through 5.
• Compliance Schedule Task 7. Task 7 of the Compliance Schedule requires Poseidon to achieve full compliance with the Ocean Plan, Water Code section 13142.5 (b) Determination for the Facility and Intake Specifications in section
IV.C of Order No. R9-2019-0003 by December 11, 2023. Poseidon’s ability to complete this task by December 11, 2023 is dependent on timely completion of Tasks 3 through 6. In closing, the plant downtime required to clean the expanded intake area and remove the
accumulated marine growth renders the Alternative 21 Intake Design infeasible. The feasibility concerns associated with the Alternative 21 Intake Design became clear after the adoption of the Order. Poseidon and the Water Authority appreciate the San Diego Water Board’s consideration of this request to amend the provisions of the Order governing
the design and operation of the new intake structure to address these concerns. The
Modified Intake Design uses the best available design and technology feasible to minimize the intake and mortality of marine life and would significantly reduce the risk of managing marine growth and debris to ensure the design and operation of the new intake provides for the ongoing viability of a critically important water supply for the San Diego region.
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Poseidon and the Water Authority respectfully request an opportunity to meet with Water
Board Staff in January 2022 to discuss the process and timeline for staff review and
approval of the Modified Intake Design and expected timeline for San Diego Water Board consideration of the amended Order. Thank you for your consideration of this request. You can reach me at (760) 655-3993
(email schawla@poseidonwater.com).
Sincerely,
Sachin Chawla Kelley Gage President Director of Water Resources
Poseidon Channelside. San Diego County Water
Authority
Cc:
Sachin Chawla, Poseidon, schawla@poseidonwater.com
Michelle Peters, Poseidon, mpowelson@poseidonwater.com
Josie McKinley, Poseidon, jmckinley@poseidonwater.com Jeremy Crutchfield, San Diego County Water Authority, JCrutchfield@sdcwa.org Tim Hogan, TWB Environmental Research and Consulting, thogan@twb-erc.com Fisayo Osibodu, San Diego Water Board, Olufisayo.Osibodu@waterboards.ca.gov
Brandi Outwin-Beals, San Diego Water Board, Brandi.Outwin-
Beals@waterboards.ca.gov Keith Yaeger, San Diego Water Board, Keith.Yaeger@waterboards.ca.gov David Barker, San Diego Water Board, David.Barker@watercoards.ca.gov Daniel Ellis, State Water Board, Daniel.Ellis@waterboards.ca.gov
Leslie Hart, State Water Board, Leslie.Hart@waterboards.ca.gov
Laura McLellan, State Water Board, Laura.McLellan@waterboards.ca.gov Vincent Vu, State Water Board, Vincent.Vu@waterboards.ca.gov
Attachment:
Appendix KKK
Carlsbad Desalination Plant
Modifications to Design of New Intake Structure
Order R9-2019-0003
Prepared for Poseidon Resources (Channelside) LP
December 21, 2021
2
1 Introduction
Order R9-2019-0003 (Order) was adopted by the San Diego Regional Water Quality Control
Board (Water Board) on May 8, 2019. The Order established discharge requirements for the
Carlsbad Desalination Plant (CDP) and also implemented the Water Code section 13142.5(b)
determination (Water Code Determination) for the facility. The Water Code Determination
implements the requirements set forth in the Desalination Amendment to the Water Quality
Control Plan for Ocean Waters of California (Ocean Plan Amendment or OPA).
In the Order, the Water Board determined that Intake Design Alternative 21 (Alt 21) provides the
best available technology feasible to minimize the intake and mortality of all forms of marine
life1. The Order also notes that multiple other Intake Design Alternatives (# 9-14) that utilize 1.0-
mm traveling water screens designed for a through-screen velocity of less than 0.5 ft/sec at the
shoreline of the Agua Hedionda Lagoon (Lagoon) complied with the OPA’s maximum through-
screen velocity requirement when applied at the onset of the intake.2
Alt 21 includes four 900-ft long, large-diameter pipelines (laterals) that would be constructed
with provisions for pigging accumulated biofouling from the laterals. In assessing future
biofouling risk associated with the 900-ft long laterals, the existing 72-in diameter pipe currently
used to draw feedwater to the CDP is a good proxy. After completion of the new dilution pump
station (Phase 2 of the intake modifications) in June 2020, temporary co-located operations with
the Encina Power Station (EPS) ceased. This transition marked the beginning of stand-alone
operation of the CDP with feedwater being drawn directly from the Lagoon without having first
passed through the EPS where it was being chlorinated to control biofouling within the power
plant’s cooling water circulating system.
Using the existing 72-in feedwater pipe as a reference, new operational experience, gained after
the Order was adopted, indicates that biofouling within the intake laterals makes Alt 21
infeasible. Up to approximately six inches of growth had accumulated on the internal surface of
the 72-in pipe within approximately ten months (Figure 1). Based on this operational experience,
the Alt 21 intake laterals may need to be pigged every three to six months in order to avoid
limitations in flow capacity (i.e., water production).
The expected downtime for pipeline cleaning, removal of the accumulated marine growth, and
stabilization of the intake water quality would halt water production and delivery an estimated
two months each year – four times longer than the total annual allowance for scheduled
maintenance. Given the importance of the CDP water supply to San Diego County, Poseidon
undertook an analysis of modifications to the Alt 21 intake design to address the feasibility and
1 Order at H.2-3. 2 Order at H.2-5 to H.2-6.
3
operational reliability concerns of the Alt 21 intake system. This report (Appendix KKK to the
Report of Waste Discharge) provides a description of the design features and potential marine
life impacts of a modification to the Alt 21 intake system (the Modified Intake Design) that is
feasible for the CDP.
Figure 1. Biofouling marine growth (mostly gooseneck barnacles) removed from the existing 72-in feedwater
pipe in April 2021. Approximately 38 bins (one shown in right image) were filled from cleaning approximately
200 feet of pipe.
As discussed in this report, implementation of the Modified Intake Design would not result in an
increase in the intake and mortality of marine life beyond that approved in the Order. Table 1
below compares Alt 21 and the Modified Intake Design and provides a summary of the criteria
that affect the magnitude of intake and mortality of marine life.
The Modified Intake Design fully complies with the OPA, meeting all of the requirements as
described in the Order3:
• The Modified Intake Design surface water intake is screened (and at the onset of the
intake per the Water Board)
• The Modified Intake Design specifies 1.0-mm dual-flow traveling water screens
(DFTWS) to address entrainment
• The Modified Intake Design specifies a through-screen velocity of 0.5 ft/sec to address
impingement
In summary, operational experience collected after the adoption of the Order revealed a
feasibility concern associated with managing biofouling in the Alt 21 laterals. The resulting
downtime required to remove and dispose of this biofouling debris makes Alt 21 infeasible.
Implementation of the Modified Intake Design eliminates this feasibility concern from the intake
design and will preserve reliable operation of the CDP.
3 Order at Section IV.C.
4
Table 1. Comparison of marine life mortality between Intake Design Alternative 21 (as approved in the Order)
and the Modified Intake Design.
Marine Life
Mortality
Component
Alternative 21 (as approved in the
Order)
Modified Intake Design
Construction-related
Permanent
habitat loss
0.2 acre 0.2 acre
Temporary
habitat loss
• Trenching for lateral installation
• Eelgrass from 2021 survey
impacted
• No laterals required
• Minimal trenching for concrete
foundations
• Eelgrass from 2021 survey not
impacted
Operation and Maintenance-related
Impingement Through-screen velocity ≤ 0.5 ft/sec
(including 15% screen occlusion) with
one screen out of service as needed for
maintenance, repair, or replacement
No change
Entrapment • Velocity upstream of 1-mm screens
is ≤ 0.5 ft/sec
No change
Entrainment Commensurate with flow rate of 299
million gallons per day (MGD)
No change in flow rate; additional
analysis to be provided in MDA4
Maintenance -
Screens
• Floating equipment (e.g., vessels)
required for all maintenance
activities
• Screen maintenance generally
accomplished from shore
Maintenance -
Water
Conveyance
• Pigging of 3,600 ft of large-
diameter piping every 3-6 months
• Removal and offsite disposal of up
to 30,000 ft3 of marine debris from
pigging
• Chemical control via chlorine ruled
out due to risk of spill
• Laterals eliminated
• Avoids extended maintenance
outages for removal of marine
debris
Maintenance -
Sedimentation
• Spot suction dredging likely
required offshore
• Spot suction dredging likely
required near southern end of
Lagoon
4 Poseidon is preparing a multiport diffuser analysis (MDA) that it will submit to the San Diego Water Board as required by Section VI.C.2.a of the Order. Although the purpose of the MDA is to provide additional information regarding potential marine life impacts for purposes of comparing a multiport diffuser and flow augmentation, it will also include information regarding the intake and mortality of marine life associated with an intake in the outer lagoon. Although the data remains under technical review, preliminary results indicate that impacts to marine life will be less than those assumed in the Order.
5
2 Project Description
2.1 General
The Modified Intake Design differs from Alt 21 in that the 1-mm screens are located closer to
shore to eliminate the 900-ft long laterals which pose a significant operation and maintenance
risk due to fouling. Figure 2Error! Reference source not found. provides plan views of Alt 21
(with passive and active wedgewire screens [WWS]) compared to the Modified intake Design.
Figure 3Error! Reference source not found. provides a more detailed view of the Modified
Intake Design. The Modified Intake Design screening structure would be located just north of
the existing EPS intake along the Lagoon shoreline (Figure 4Error! Reference source not
found. and Figure 5Error! Reference source not found.).
The new screening structure would be constructed on the southern shoreline of the Lagoon to
house 1-mm DFTWS. Considering the shoreline intake location at the southern end of the
Lagoon, the intake technology will be capable of removing debris which is likely to accumulate
there. Previous operational experience at the EPS indicates that having the ability to remove
debris is critical for maintaining reliable intake flow. Without a means to collect and remove
debris with WWS, operators would have to rely on the natural hydrodynamics within the Lagoon
and tidal flushing to move marine debris out of the system. At this location, natural
hydrodynamics would be insufficient to flush debris away from the intake. Reliable management
of debris becomes increasingly important during storm events when high debris loads of kelp
are more likely to occur. Without reliable debris management equipment (e.g., DFTWS), intake
blockage can limit intake flow capacity and therefore drinking water production capacity.
The DFTWS of the new screening structure would screen both the seawater reverse osmosis
(SWRO) feedwater drawn through the existing Intake Pump Station (IPS) and brine dilution flow
drawn through the recently constructed Dilution Pump Station (DPS). The intake structure would
have a maximum intake capacity of approximately 299 MGD. The intake screens would have
1.0-mm mesh and a through-screen velocity of 0.5 feet per second or less (including 15%
screen occlusion) with one screen out of service as needed for maintenance, repair, or
replacement.
The new screening structure would be approximately 158 feet long and would include a large
organism exclusion device and 11 DFTWS (10 duty screens and one stand-by) with 1-mm
mesh. The intake screening area would be bounded by baffle walls in order to segregate
screened from unscreened water. The screening structure deck will be constructed of grating. A
bridge supported by concrete piles is included downstream of the DFTWS to allow crane access
for installation/removal/maintenance of the DFTWS.
6
Figure 2. Site plans for Alt 21 with passive WWS (left), Alt 21 with active WWS (center), and Modified Intake Design (right).
7
Figure 3. Modified Intake Design site plan. The footprint of the installation is delineated in blue.
8
Figure 4. Modified Intake Design plan view.
Figure 5. Modified Intake Design section view.
9
2.2 Floating Boom
A floating boom (similar to that proposed for Alt 21) would be deployed to deflect large floating
debris that would otherwise pose an operational risk to the 1-mm DFTWS. The floating boom
would include an impervious/solid skirt submerged to a depth of approximately three feet. The
floating boom would be anchored in a manner to allow it to rise and fall with the tide.
2.3 Large Organism Exclusion Device
The Endangered Species Act (ESA) and Marine Mammal Protection Act (MMPA) prohibit “take”
of protected marine mammals. “Take” includes harassment, hunting, capturing, collecting, or
killing of marine mammals in U.S. waters. Given the effort to locate the 1-mm screens at the
onset of the intake, the resource agencies may be concerned about the potential for “take” as
defined above.
The intake structure would include a large organism exclusion device downstream of the floating
debris boom and upstream of the DFTWS. This device is anticipated to be required by the
regulatory agencies for preventing any involvement of large marine organisms (e.g., marine
mammals, turtles) with the rotating screening equipment.
2.4 Dual-Flow Traveling Water Screens
The Modified Intake Design specifies DFTWS in lieu of WWS. This change in intake technology
is proposed because the Alt 21 intake laterals can no longer be operated reliably due to
biofouling concerns. To alleviate this operational reliability issue, the Modified Intake Design
proposes to move the new intake structure closer to the shore, thereby eliminating the intake
laterals. At this intake location, the intake technology used must have the capacity to collect and
remove debris since operational experience at the EPS has shown that debris can become
concentrated in this location. Whereas WWS (on their own) lack the capability to collect and
remove free-floating debris that accumulates at this location, DFTWS do have debris removal
capability. Since the DFTWS would be located at the onset of the intake, would include 1.0-mm
mesh, and would have a through-screen velocity of 0.5 ft/sec or less, the Modified Intake Design
complies with the OPA. Furthermore, since intake velocities at all locations upstream of the 1-
mm DFTWS would also be 0.5 ft/sec or less, there would be no entrapment.
DFTWS are oriented perpendicular to the approaching flow and both the ascending and
descending sides of the screen provide screening area (Figure 6Error! Reference source not
found.). The DFTWS are designed such that the screening mesh is always on the upstream
side of the screen. The DFTWS therefore eliminate the potential for carryover of debris by
keeping all screening area on the upstream side. Keeping all screening are on the upstream
side also maximizes the screening area available to pass flow. Dual-flow screens are also
10
referred to as double-entry, single-exit screens. Error! Reference source not found. provides
an illustration of a representative DFTWS.
The DFTWS are approximately 40 feet tall, 10 feet wide, and are comprised of multiple
individual screening panels (referred to as baskets). The baskets are attached to guided chains
which rotate by way of a head sprocket located above deck level. The head sprocket is driven
by a motor and gearbox. All mechanical and electrical components would be above water and
accessible from the deck level. The DFTWS would be capable of continuous rotation for
managing periods of high debris loading (e.g., storms). Above deck level, a spraywash system
would rinse debris from the screen baskets into a debris trough/pipeline. The debris
trough/pipeline would act as a sluice to transport collected debris to the discharge pond.
Figure 6. Representative dual-flow traveling water screen. From left to right: view from upstream, view from
downstream (images courtesy Inmartek LTD), and plan view of intake flow pattern (modified from EPRI 2021).
11
3 Marine Life Mortality Assessment
Potential marine life mortality associated with the Modified Intake Design can be generally
separated into construction-related and operation and maintenance-related effects. Each is
described in the following sections with reference to the analysis provided in the Water Code
(section 13142.5(b)) Determination (Appendix H.2) of the Order.
3.1 Construction-Related Effects
Construction-related effects include both the permanent loss of benthic habitat and temporary
effects limited to the construction window (or shortly thereafter).
3.1.1 Permanent Habitat Loss
The footprint of the Modified Intake Design that would result in the permanent loss of benthic
habitat is limited to an estimated 0.2 acres (Error! Reference source not found.), which is
equivalent to the estimated 0.2 acres for Alt 215. This footprint corresponds to the area
encompassed by the large organism exclusion device and all of the area bounded by the baffle
walls (i.e., DFTWS, and area between the DFTWS and the Lagoon shoreline).
3.1.2 Temporary Habitat Loss
Temporary construction impacts would be minimal for the Modified Intake Design and would
include:
• Dredging/excavation of the Lagoon floor for screen structure foundation installation
• Installation of piles for screens, baffle walls, and deck
• Installation of floor slab for screen support
• Installation of screen and deck structures
• Installation of DFTWS
• Installation of debris boom/curtain, and large organism exclusion device
• Connection of the new onshore intake pipeline from the intake tunnel to the existing
intake pump station (Described in Addendum 6)
• Sealing the intake and discharge tunnels (Described in Addendum 6)
Construction is expected to last approximately 16 months. To mitigate for any temporary
turbidity concern related to construction, the contractor will use a sediment/silt curtain (or
similar).
5 Per Appendix EEE and Order at H.2-17.
12
Based on the most recent eelgrass survey, construction of the Modified Intake Design will avoid
eelgrass. By comparison, Alt 21 could potentially displace eelgrass during the installation of the
four large-diameter laterals. Figure 7 illustrates and compares the potential impacts to eelgrass
from the Modified Intake Design and Alt 21.
Figure 7. Comparison between potential construction impacts associated with the Modified Intake Design
(left) and Alt 21 (right). Location of eelgrass in Agua Hedionda Lagoon based on 2021 survey. Locations of
eelgrass (as surveyed in 2021) are shown as small dots within larger circles (5-m boundary around all
vegetated eelgrass as identified in Merkel 2021).
3.2 Operation and Maintenance-Related Effects
3.2.1 Impingement
Impingement refers to the pinning of larger organisms against the screen mesh by the flow of
the withdrawn water. Intake velocity is commonly accepted to be the strongest predictor of
13
impingement. The OPA6 identifies a through-screen velocity of 0.5 ft/sec as the means to
minimize impingement.
As described above, the DFTWS are designed to operate at less than 0.5 ft/.sec under worst
case scenario: 15% occlusion of all screens, one screen out of service. All calculations are
based on the available bathymetric data, conceptual intake structure design, and vendor-
provided screen porosity data. As Water Board staff noted in their April 8, 2021 letter concerning
the Modified Intake Design, San Diego Water Board staff concur with Poseidon that a 0.5 feet
per second velocity is compliant with the Ocean Plan and eliminates impingement7.
3.2.2 Entrapment
Entrapment refers to the capture of marine life within the intake system somewhere upstream of
the 1-mm screens without provision of a means to escape8. Entrapment may present a concern
at intakes that include a tunnel or pipe to connect the withdrawal point to the fine screening
point. For example, the configuration of the intake in Alternatives 1, 2, and 15-20 included reuse
of the existing EPS tunnels. At the design intake flow rate of 299 MGD, the estimated velocity in
the tunnel was approximately 2.6 ft/sec, which (in the absence of another means of egress such
as a fish return system) may pose an entrapment risk for some fishes that would otherwise want
to escape. This concern is reflected in the Order at page H.2-10, which noted that certain
onshore traveling screen design alternatives (i.e., those that include use of the existing tunnels)
present risks of entrapment to marine life.
The Modified Intake Design has been designed to eliminate this potential entrapment risk. The
Order at Table H.2-4 acknowledges that Lagoon Traveling Screens at the Shoreline designed
for a through-screen velocity of less than 0.5 ft/sec do not present entrapment impacts.
As noted during the September 29, 2021 presentation to Water Board staff, bar racks were
initially considered, but in light of feedback from staff, have been removed from the Modified
Intake Design. A floating boom (Figure 3 and Figure 4) has been included instead of a bar rack
to intercept large floating debris (e.g., kelp).
In addition, it is anticipated that regulatory agencies will require a large organism exclusion
device to prevent any involvement of large marine organisms (e.g., marine mammals, turtles)
with the rotating screening equipment. Therefore, the Modified Intake Design includes a large
6 See chapter III.M.2.d(1)(c)iv.
7 April 8, 2021 letter to Michelle Peters; subject: New Proposed Intake Design Alternative for the Carlsbad Desalination Plant (Alternative 22).
8 As noted in the Order, the Ocean Plan does not define entrapment. However, the U.S. Environmental Protection Agency defines entrapment for cooling water intakes at power plants in 40 CFR section 125.92 as: “the condition where impingeable fish and shellfish lack the means to escape the cooling water intake.” (Order, p. H.2-9.)
14
organism exclusion device. Spacing of the bars comprising the large organism exclusion device
would be determined in consultation with regulatory agencies during detailed design9. Thus,
considering the typical spacing required by the regulatory agencies to protect these organisms
and the very low intake velocities upstream of the 1-mm DFTWS (less than 0.5 ft/sec), the large
organism exclusion device would not present an entrapment risk. Fish swimming near the intake
structure would be doing so volitionally and would be able to easily avoid the very low intake
velocities upstream of the 1-mm DFTWS.
3.2.3 Entrainment
Entrainment refers to the passage of early life stages of marine organisms (essentially passive
life stages that cannot mount a directional response to flow) through the 1-mm screens.
Entrainment is volumetric and therefore generally commensurate with flow rate. This
relationship is described in the Order: All of the surface water intake design alternatives
considered in this analysis include 1.0 mm intake screens in accordance with the Ocean Plan
chapter III.M.2.d.(1)(c)ii requirements. The only difference among the design alternatives that
could affect the amount of marine life that are entrained is the volume of intake water required
by each Design Alternative.10 Here, the volume of intake water would not change with the
Modified Intake Design.
In addition, pursuant to Section VI.C.2.a of the Order, Poseidon is in the process of preparing
the MDA Final Report that it intends to submit to the San Diego Water Board prior to the March
18, 2022 deadline. This analysis will provide additional information regarding intake and
mortality to all forms of marine life for purposes of comparing a theoretical multiport diffuser in
the Pacific Ocean and flow augmentation. While the preliminary data remain under technical
review, preliminary results indicate that intake and mortality to all forms of marine life associated
with an intake in the Lagoon will be less than that assumed in the Order and less than that of a
theoretical multiport diffuser in the Pacific Ocean.
3.2.4 Maintenance
3.2.4.1 Screens
Given the shoreline location of the Modified Intake Design screening structure, most planned
(i.e., routine) and unplanned (i.e., emergency) screen maintenance can most likely be
accomplished from shore. Routine maintenance that can be accomplished from shore would
include tasks such as screen removal, screen basket replacement, chain replacement, gear box
inspection. In addition, the use of divers would be significantly reduced in comparison to Alt 21.
9 See, e.g., Statewide Water Quality Control Policy on the Use of Estuarine Waters for Power Plant Cooling section 2.C.(1), page 7. 10 Order at H.2-9.
15
Divers may only be required for occasional inspection of submerged components that are not
accessible from the deck level (e.g., DFTWS support frame and boot section).
By contrast, Alt 21 would rely solely on the use of floating equipment and divers for all
maintenance tasks, whether routine or emergency. In addition to quarterly pigging of the
pipeline laterals mentioned above, since the Alt 21 WWS technology has not been used widely
in seawater, the expectation is that the array of screens would require routine inspection and
maintenance to ensure reliable operation. The Modified Intake Design’s DFTWS will be
inspected mostly above the water. In addition, DFTWS have operational history in seawater
applications, and based on that experience, Poseidon anticipates that the inspection effort will
be less than that associated with WWS.
3.2.4.2 Water Conveyance
The principal benefit of the Modified Intake Design is the elimination of the four large-diameter,
900-ft long laterals and the associated need to manage the cleaning of the marine growth that is
expected to accumulate in them. As noted above, operational experience gained from cleaning
required on the existing 72-in diameter intake pipe indicates that regular (every three to six
months) pigging of Alt 21 laterals would be required to avoid negatively impacting the intake
capacity (and subsequently the drinking water production capacity).
The annual volume of biofouling that would need to removed is estimated to be up to 30,000
cubic feet; representing a substantial amount of biological material that would have to be
disposed of (presumably transported to a landfill). Pigging will also negatively impact feedwater
turbidity – a parameter with both operational and regulatory thresholds.11 Water production
would be halted while the pipeline cleaning is underway and would not resume until the residual
debris is removed and the turbidity in the intake is in compliance with the CDP operating
permits. The expected downtime for pipeline cleaning, removal of the accumulated marine
growth, and stabilization of the intake water quality would halt water production and delivery an
estimated two months each year.
Poseidon evaluated chlorine dosing (both continued chlorine addition and shock dosing) as a
potential chemical control for biofouling in the pipelines but eliminated it from further
consideration due to risk associated with a spill of chlorine in the Lagoon which could affect both
ambient organisms and those raised at the adjacent shellfish aquaculture facility. Additionally,
chlorine dosing lines would have to be routed along the external surfaces of the laterals in order
11 The Drinking Water Permit issued to the CDP by the State Water Resources Control Board prohibits plant production if the intake turbidity is greater than 24 NTU and the Order prohibits discharges to the Pacific Ocean that cause aesthetically undesirable discoloration of the ocean surface.
16
to preserve the potential to pig. A pig could not be operated if chlorine piping is mounted to the
internal surface of the lateral.
The Order12 also prohibits heat treatment. Since the EPS has been decommissioned, there is
no longer a heated effluent that could provide such treatment for fouling.
The Modified Intake Design would not have any of the above noted impacts associated with the
water conveyance method since the elimination of the laterals also eliminates the associated
biofouling removal and turbidity issues.
3.2.4.3 Sedimentation
Water Board staff noted in Appendix H.2 to the Order that routine ”[d]redging may no longer be
needed in the 800 linear feet between the WWS and the south shoreline where the current
intake is located”.13 It is noted that sedimentation primarily occurs at the entrance to the Lagoon
from the Pacific Ocean; the southern half of the Lagoon rarely requires maintenance dredging.
For example, Poseidon understands that the area south of the Alt 21 location has not been
dredged for approximately 15 years. Therefore, dredging is not expected to be routinely
required for the Modified Intake Design either.
The Order acknowledged that, for Alt 21, spot suction dredging may be required around the
screens to remove accumulated debris and occasionally to keep the mouth of the lagoon open
for water flow.14 With respect to suction dredging at the screens, Poseidon anticipates that such
dredging may be required to minimize the risk of the ingestion of sand/sediment by the WWS in
Alt 21. Suction dredging would be conducted from a vessel stationed over the WWS array.
Similarly, the Modified Intake Design may also require spot suction dredging.
4 Conclusions
Implementation of the Modified Intake Design would not result in an increase in the intake and
mortality of marine life beyond that approved in the Order.
The Modified Intake Design fully complies with the OPA and satisfies all of the requirements
described in the Order15. Importantly, implementation of the Modified Intake Design eliminates
the feasibility concerns from Alt 21’s intake design and will preserve reliable operation of the
CDP.
12 Order at Section IV.C.9. 13 Order at H.2-11.
14 Order at H.2-11. 15 Order at Section IV.C.
17
5 References
Electric Power Research Institute (EPRI). 2021. Best Management Practices Manual for
Preventing Cooling Water Intake Blockages. EPRI, Palo Alto, CA: 2021. 3002019660.
Merkel and Associates (Merkel). 2021. Post‐dredge eelgrass survey in support of the Agua
Hedionda. 2021 Dredging Project at Agua Hedionda Lagoon (Outer Lagoon), Carlsbad, CA.
Prepared for Poseidon Water. M&A# 20063-01, April 26, 2021.
Appendix B
Air Quality, Greenhouse Gas Emissions, and Energy
Calculations
Page 1 of 42Off-road Equipment - No Landside EquipmentOff-road Equipment - info provided by clientOff-road Equipment - Mobilization: applicant provided project-specific detail.Off-road Equipment - Permanent Pile Driving: applicant provided project-specific detail.Off-road Equipment - Construction and Installation of Intake Screen Structure: applicant provided project-specific detail.Off-road Equipment - Deck Structure Construction: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - provided by clientOff-road Equipment - Dredge Material Hauling phase included to account for dust and trips from hauling of dredged material during Turbidity Curtain Construction.0.0041.3 User Entered Comments & Non-Default DataProject Characteristics - Land Use - Applicant provided project specific detail.Construction Phase - Applicant provided project specific detail.CO2 Intensity (lb/MWhr)539.98CH4 Intensity (lb/MWhr)0.033N2O Intensity (lb/MWhr)Climate Zone13Operational Year2023Utility CompanySan Diego Gas & Electric01.2 Other Project CharacteristicsUrbanizationUrbanWind Speed (m/s)2.6Precipitation Freq (Days)40User Defined Industrial1.00User Defined Unit2.000.00Carlsbad Desalination Alternative 22San Diego County APCD Air District, Annual1.0 Project Characteristics1.1 Land UsageLand UsesSizeMetricLot Acreage Floor Surface AreaPopulationCalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
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Page 4 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentLoadFactor0.370.45tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentLoadFactor0.560.20tblOffRoadEquipmentLoadFactor0.380.45
Page 5 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00
Page 6 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00
Page 7 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0046.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.002.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0050.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.0040.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.00165.00tblTripsAndVMTHaulingTripNumber0.00275.00tblTripsAndVMTHaulingTripLength20.0025.40tblTripsAndVMTHaulingTripNumber0.0050.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00
Page 8 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied2.0 Emissions Summary2.1 Overall ConstructionUnmitigated ConstructiontblTripsAndVMTWorkerTripNumber15.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber8.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0014.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00
Page 9 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN20 CO2ePM2.5 TotalBio- CO2 NBio-CO2 Total CO2 CH4Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5ROG NOx CO SO2990.1292 990.1292 0.1760 8.3100e-003997.00650.0637 2.9400e-003254.5285Maximum 0.5595 4.5790 5.1326 0.0114 0.0715 0.2050 0.2765 0.0193 0.1979 0.2172 0.00000.0345 0.0425 0.0000 252.0603 252.06032.8700e-003 0.0298 0.0368 0.0666 8.0200e-0032024 0.1115 0.9406 1.0421990.1292 990.1292 0.1760 8.3100e-003997.00650.0275 5.2100e-003202.02892023 0.5595 4.5790 5.1326 0.0114 0.0715 0.2050 0.2765 0.0193 0.1979 0.2172 0.00000.0423 0.0490 0.0000 199.7902 199.79022.2800e-003 0.0245 0.0435 0.0679 6.6500e-0032022 0.1159 0.9581 1.0460N2O CO2eYeartons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated ConstructionROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5990.1302 990.1302 0.1760 8.3100e-003997.00760.0637 2.9400e-003254.5287Maximum 0.5595 4.5790 5.1326 0.0114 0.0715 0.2050 0.2765 0.0193 0.1979 0.2172 0.00000.0345 0.0425 0.0000 252.0606 252.06062.8700e-003 0.0298 0.0368 0.0666 8.0200e-0032024 0.1115 0.9406 1.0421990.1302 990.1302 0.1760 8.3100e-003997.00760.0275 5.2100e-003202.02912023 0.5595 4.5790 5.1326 0.0114 0.0715 0.2050 0.2765 0.0193 0.1979 0.2172 0.00000.0423 0.0490 0.0000 199.7903 199.79032.2800e-003 0.0245 0.0435 0.0679 6.6500e-0032022 0.1159 0.9581 1.0460N2O CO2eYeartons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 10 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied5 1059 Temporary Access Trestle Removal Building Construction6/27/2023 8/1/20235 268 Vault for Tunnel IsolationBuilding Construction6/26/2023 11/17/20235 727 Deck Structure Construction Building Construction4/19/2023 6/26/20237 696 Install 72 Inch LineBuilding Construction3/15/2023 6/22/20237 705 Permanent Pile DrivingBuilding Construction2/1/20234/18/20237 774 Temporary Access Trestle InstallationBuilding Construction11/23/2022 1/31/20237 143 Dredging/ExcavationDemolition11/16/2022 12/22/20225 272 Turbidity Curtain Construction Building Construction11/2/2022 11/15/2022Num Days WeekNum DaysPhase Description1 MobilizationSite Preparation9/7/20229/20/20227 14Phase NumberPhase NamePhase TypeStart Date End Date3.0 Construction DetailConstruction PhaseHighest2.02832.02838 6-15-20249-14-20240.12890.128973-15-20246-14-20240.44810.4481612-15-20233-14-20240.47770.477759-15-202312-14-20230.58070.580746-15-20239-14-20231.06201.062033-15-20236-14-20232.02832.0283212-15-20223-14-20231.76451.764519-15-202212-14-20220.71580.71580.00 0.00 0.00QuarterStart DateEnd DateMaximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter)Percent Reduction0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Page 11 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.48Temporary Access Trestle Installation Air Compressors4 10.00780.37Temporary Access Trestle Installation Aerial Lifts210.00630.31Dredging/ExcavationTractors/Loaders/Backhoes00.00970.73Dredging/ExcavationRubber Tired Dozers00.002470.40Dredging/ExcavationConcrete/Industrial Saws00.00810.37Turbidity Curtain ConstructionWelders210.00460.45Turbidity Curtain ConstructionTractors/Loaders/Backhoes00.00970.20Turbidity Curtain ConstructionGenerator Sets210.00840.74Turbidity Curtain ConstructionForklifts110.00890.48Turbidity Curtain ConstructionCranes110.002310.29Turbidity Curtain ConstructionAir Compressors410.00780.37Turbidity Curtain ConstructionAerial Lifts210.00630.31MobilizationTractors/Loaders/Backhoes00.00970.50MobilizationRubber Tired Loaders110.001680.45MobilizationForklifts110.0089Load FactorMobilizationExcavators110.00450.45Phase NameOffroad Equipment TypeAmountUsage Hours Horse PowerAcres of Grading (Site Preparation Phase): 0Acres of Grading (Grading Phase): 0Acres of Paving: 0Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural Coating – OffRoad Equipment5 10813 DemobilizationBuilding Construction7/8/20247/31/20245 1812 Demolition of Existing Tunnels Demolition2/7/20247/7/20247 4511 Plant ShutdownBuilding Construction1/3/20242/6/20245 2510 Construction and Installation of Intake Screen StructureBuilding Construction8/30/2023 10/13/2023
Page 12 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.74Deck Structure ConstructionTractors/Loaders/Backhoes00.00970.37Deck Structure ConstructionGenerator Sets210.00840.29Deck Structure ConstructionForklifts110.00890.20Deck Structure ConstructionCranes110.002310.31Deck Structure ConstructionAir Compressors410.00780.48Deck Structure ConstructionAerial Lifts210.00630.37Install 72 Inch LineWelders00.00460.45Install 72 Inch LineTractors/Loaders/Backhoes00.00970.20Install 72 Inch LineGenerator Sets00.00840.74Install 72 Inch LineForklifts00.00890.29Install 72 Inch LineExcavators110.003450.45Install 72 Inch LineCranes110.002490.45Install 72 Inch LineBore/Drill Rigs110.002310.29Permanent Pile DrivingWelders210.00460.25Permanent Pile DrivingTractors/Loaders/Backhoes00.00970.37Permanent Pile DrivingOther Construction Equipment310.001000.20Permanent Pile DrivingGenerator Sets210.00840.74Permanent Pile DrivingForklifts110.00890.45Permanent Pile DrivingCranes110.002310.29Permanent Pile DrivingBore/Drill Rigs110.004690.48Permanent Pile DrivingBore/Drill Rigs110.002210.50Permanent Pile DrivingAir Compressors410.00780.45Permanent Pile DrivingAerial Lifts210.00630.31Temporary Access Trestle Installation Welders210.00460.74Temporary Access Trestle Installation Tractors/Loaders/Backhoes00.00970.37Temporary Access Trestle Installation Generator Sets210.00840.29Temporary Access Trestle Installation Forklifts110.00890.20Temporary Access Trestle Installation Cranes110.00231Temporary Access Trestle Installation Bore/Drill Rigs110.002210.50
Page 13 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.29Plant ShutdownCranes110.002490.45Plant ShutdownAir Compressors410.00780.48Construction and Installation of Intake Screen StructureWelders210.00460.74Construction and Installation of Intake Screen StructureTractors/Loaders/Backhoes00.00970.37Construction and Installation of Intake Screen StructureGenerator Sets210.00840.29Construction and Installation of Intake Screen StructureForklifts110.00890.20Construction and Installation of Intake Screen StructureCranes110.002310.31Construction and Installation of Intake Screen StructureAir Compressors410.00780.48Construction and Installation of Intake Screen StructureAerial Lifts210.00630.37Temporary Access Trestle Removal Welders210.00460.45Temporary Access Trestle Removal Tractors/Loaders/Backhoes00.00970.20Temporary Access Trestle Removal Generator Sets210.00840.74Temporary Access Trestle Removal Forklifts110.00890.50Temporary Access Trestle Removal Cranes110.002310.29Temporary Access Trestle Removal Bore/Drill Rigs110.002210.31Temporary Access Trestle Removal Air Compressors410.00780.48Temporary Access Trestle Removal Aerial Lifts210.00630.37Vault for Tunnel IsolationWelders00.00460.45Vault for Tunnel IsolationTractors/Loaders/Backhoes00.00970.20Vault for Tunnel IsolationGenerator Sets00.00840.74Vault for Tunnel IsolationForklifts00.00890.29Vault for Tunnel IsolationExcavators00.003450.45Vault for Tunnel IsolationCranes110.002490.45Vault for Tunnel IsolationAir Compressors00.00780.48Deck Structure ConstructionWelders210.0046
Page 14 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedHHDTPermanent Pile Driving1740.00 10.004.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixTemporary Access Trestle Installation1340.00 10.004.00HHDTDredging/Excavation040.00 10.00 275.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 25.40 LD_MixHDT_MixTurbidity Curtain Construction1240.00 46.00 165.00Hauling Vehicle ClassMobilization340.00 10.00 50.0010.807.30 20.00 LD_MixHDT_Mix HHDT0.45Trips and VMTPhase Name Offroad Equipment CountWorker Trip NumberVendor Trip NumberHauling Trip NumberWorker Trip LengthVendor Trip LengthHauling Trip LengthWorker Vehicle ClassVendor Vehicle ClassDemobilizationWelders00.00460.74DemobilizationTractors/Loaders/Backhoes00.00970.37DemobilizationGenerator Sets00.00840.29DemobilizationForklifts110.00890.20DemobilizationCranes00.002310.45Demolition of Existing TunnelsTractors/Loaders/Backhoes00.00970.37Demolition of Existing TunnelsSkid Steer Loaders210.00700.20Demolition of Existing TunnelsRubber Tired Dozers00.002470.40Demolition of Existing TunnelsForklifts110.00890.29Demolition of Existing TunnelsExcavators110.003450.45Demolition of Existing TunnelsCranes110.002490.20Demolition of Existing TunnelsConcrete/Industrial Saws00.00810.73Demolition of Existing TunnelsCement and Mortar Mixers110.00200.37Plant ShutdownWelders210.00460.45Plant ShutdownTractors/Loaders/Backhoes00.00970.20Plant ShutdownGenerator Sets00.00840.74Plant ShutdownForklifts110.0089Plant ShutdownExcavators110.003450.45
Page 15 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.0400e-0030.0000 9.4877Unmitigated Construction Off-Site3.3200e-0033.3200e-003 0.0000 9.4116 9.41161.1000e-004 0.0000 3.6100e-0033.6100e-003 0.0000Total 7.4200e-0030.0640 0.07719.4116 9.4116 3.0400e-0030.0000 9.48770.0000 0.0000 0.0000Off-Road 7.4200e-0030.0640 0.0771 1.1000e-0043.6100e-0033.6100e-0033.3200e-0033.3200e-003 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.1 Mitigation Measures Construction3.2 Mobilization - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5HHDTDemobilization140.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixDemolition of Existing Tunnels640.00 10.00 20.00HHDTPlant Shutdown940.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixConstruction and Installation of Intake Screen Structure1240.00 10.002.00HHDTTemporary Access Trestle Removal1340.00 10.004.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixVault for Tunnel Isolation110.00 10.00 50.00HHDTDeck Structure Construction1240.00 14.004.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixInstall 72 Inch Line340.00 10.00 40.00
Page 16 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.0400e-0030.0000 9.4877Mitigated Construction Off-Site3.3200e-0033.3200e-003 0.0000 9.4116 9.41161.1000e-004 0.0000 3.6100e-0033.6100e-003 0.0000Total 7.4200e-0030.0640 0.07719.4116 9.4116 3.0400e-0030.0000 9.48770.0000 0.0000 0.0000Off-Road 7.4200e-0030.0640 0.0771 1.1000e-0043.6100e-0033.6100e-0033.3200e-0033.3200e-003 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.54.8616 4.8616 1.8000e-0045.1000e-0045.01936.0000e-0055.0000e-0051.8521Total 1.0700e-0038.6500e-0039.1200e-003 5.0000e-005 3.1400e-0039.0000e-0053.2400e-003 8.5000e-0049.0000e-0059.4000e-004 0.00001.0000e-0056.1000e-004 0.0000 1.8347 1.83472.0000e-005 2.2500e-0031.0000e-0052.2600e-003 6.0000e-004Worker 8.1000e-0045.9000e-0046.8700e-0031.4598 1.4598 4.0000e-0052.1000e-0041.52418.0000e-0052.5000e-0041.6431Vendor 1.5000e-0043.8500e-0031.2600e-003 1.0000e-005 4.6000e-0044.0000e-0055.1000e-004 1.3000e-0044.0000e-0051.7000e-004 0.00004.0000e-0051.6000e-004 0.0000 1.5670 1.56702.0000e-005 4.3000e-0044.0000e-0054.7000e-004 1.2000e-004Hauling 1.1000e-0044.2100e-0039.9000e-004CH4 N2O CO2eCategorytons/yrMT/yrExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO
Page 17 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedUnmitigated Construction Off-Site33.2929 33.2929 4.2900e-0030.0000 33.40014.2900e-0030.0000 33.4001Total 0.0251 0.1982 0.2244 3.9000e-0049.8200e-0039.8200e-0039.6300e-0039.6300e-003 0.00009.6300e-0039.6300e-003 0.0000 33.2929 33.29293.9000e-0049.8200e-0039.8200e-003Off-Road 0.0251 0.1982 0.2244N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.3 Turbidity Curtain Construction - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.54.8616 4.8616 1.8000e-0045.1000e-0045.01936.0000e-0055.0000e-0051.8521Total 1.0700e-0038.6500e-0039.1200e-003 5.0000e-005 3.1400e-0039.0000e-0053.2400e-003 8.5000e-0049.0000e-0059.4000e-004 0.00001.0000e-0056.1000e-004 0.0000 1.8347 1.83472.0000e-005 2.2500e-0031.0000e-0052.2600e-003 6.0000e-004Worker 8.1000e-0045.9000e-0046.8700e-0031.4598 1.4598 4.0000e-0052.1000e-0041.52418.0000e-0052.5000e-0041.6431Vendor 1.5000e-0043.8500e-0031.2600e-003 1.0000e-005 4.6000e-0044.0000e-0055.1000e-004 1.3000e-0044.0000e-0051.7000e-004 0.00004.0000e-0051.6000e-004 0.0000 1.5670 1.56702.0000e-005 4.3000e-0044.0000e-0054.7000e-004 1.2000e-004Hauling 1.1000e-0044.2100e-0039.9000e-004CH4 N2O CO2eCategorytons/yrMT/yrExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO
Page 18 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.533.2928 33.2928 4.2900e-0030.0000 33.40014.2900e-0030.0000 33.4001Total 0.0251 0.1982 0.2244 3.9000e-0049.8200e-0039.8200e-0039.6300e-0039.6300e-003 0.00009.6300e-0039.6300e-003 0.0000 33.2928 33.29283.9000e-0049.8200e-0039.8200e-003Off-Road 0.0251 0.1982 0.2244N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.515.0589 15.0589 5.7000e-0042.0600e-00315.68816.0000e-0055.0000e-0051.8521Total 1.9600e-0030.0355 0.0165 1.6000e-004 6.1800e-0033.6000e-0046.5400e-003 1.7100e-0033.5000e-0042.0600e-003 0.00001.0000e-0056.1000e-004 0.0000 1.8347 1.83472.0000e-005 2.2500e-0031.0000e-0052.2600e-003 6.0000e-004Worker 8.1000e-0045.9000e-0046.8700e-0036.7150 6.7150 2.0000e-0049.8000e-0047.01073.1000e-0041.0300e-0036.8252Vendor 7.1000e-0040.0177 5.8100e-003 7.0000e-005 2.1400e-0031.9000e-0042.3200e-003 6.2000e-0041.8000e-0048.0000e-004 0.00001.6000e-0046.5000e-004 0.0000 6.5092 6.50927.0000e-005 1.7900e-0031.6000e-0041.9600e-003 4.9000e-004Hauling 4.4000e-0040.0172 3.8500e-003N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 19 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.0000 0.0000 0.0000Unmitigated Construction Off-Site0.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.4 Dredging/Excavation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.515.0589 15.0589 5.7000e-0042.0600e-00315.68816.0000e-0055.0000e-0051.8521Total 1.9600e-0030.0355 0.0165 1.6000e-004 6.1800e-0033.6000e-0046.5400e-003 1.7100e-0033.5000e-0042.0600e-003 0.00001.0000e-0056.1000e-004 0.0000 1.8347 1.83472.0000e-005 2.2500e-0031.0000e-0052.2600e-003 6.0000e-004Worker 8.1000e-0045.9000e-0046.8700e-0036.7150 6.7150 2.0000e-0049.8000e-0047.01073.1000e-0041.0300e-0036.8252Vendor 7.1000e-0040.0177 5.8100e-003 7.0000e-005 2.1400e-0031.9000e-0042.3200e-003 6.2000e-0041.8000e-0048.0000e-004 0.00001.6000e-0046.5000e-004 0.0000 6.5092 6.50927.0000e-005 1.7900e-0031.6000e-0041.9600e-003 4.9000e-004Hauling 4.4000e-0040.0172 3.8500e-003Categorytons/yrMT/yr
Page 20 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.0000 0.0000 0.0000Mitigated Construction Off-Site0.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.514.9724 14.9724 6.1000e-0041.8800e-00315.54821.1000e-0041.0000e-0043.5719Total 2.4700e-0030.0317 0.0212 1.6000e-004 7.5900e-0033.3000e-0047.9000e-003 2.0600e-0033.0000e-0042.3500e-003 0.00002.0000e-0051.1700e-003 0.0000 3.5384 3.53844.0000e-005 4.3300e-0033.0000e-0054.3600e-003 1.1500e-003Worker 1.5600e-0031.1300e-0030.01332.8153 2.8153 9.0000e-0054.1000e-0042.93934.1000e-0041.3700e-0039.0370Vendor 3.0000e-0047.4300e-0032.4300e-003 3.0000e-005 9.0000e-0048.0000e-0059.7000e-004 2.6000e-0047.0000e-0053.3000e-004 0.00002.1000e-0048.5000e-004 0.0000 8.6187 8.61879.0000e-005 2.3600e-0032.2000e-0042.5700e-003 6.5000e-004Hauling 6.1000e-0040.0232 5.4600e-003Categorytons/yrMT/yr
Page 21 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5112.9456 112.9456 0.0185 0.0000 113.40770.0185 0.0000 113.4077Total 0.0753 0.6074 0.6750 1.3200e-0030.0291 0.02910.0285 0.0285 0.00000.0285 0.0285 0.0000 112.9456 112.94561.3200e-0030.0291 0.0291Off-Road 0.0753 0.6074 0.6750N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.5 Temporary Access Trestle Installation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.514.9724 14.9724 6.1000e-0041.8800e-00315.54821.1000e-0041.0000e-0043.5719Total 2.4700e-0030.0317 0.0212 1.6000e-004 7.5900e-0033.3000e-0047.9000e-003 2.0600e-0033.0000e-0042.3500e-003 0.00002.0000e-0051.1700e-003 0.0000 3.5384 3.53844.0000e-005 4.3300e-0033.0000e-0054.3600e-003 1.1500e-003Worker 1.5600e-0031.1300e-0030.01332.8153 2.8153 9.0000e-0054.1000e-0042.93934.1000e-0041.3700e-0039.0370Vendor 3.0000e-0047.4300e-0032.4300e-003 3.0000e-005 9.0000e-0048.0000e-0059.7000e-004 2.6000e-0047.0000e-0053.3000e-004 0.00002.1000e-0048.5000e-004 0.0000 8.6187 8.61879.0000e-005 2.3600e-0032.2000e-0042.5700e-003 6.5000e-004Hauling 6.1000e-0040.0232 5.4600e-003Categorytons/yrMT/yr
Page 22 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.0000 1.0000e-0050.07320.0000 1.0000e-005 0.0000 0.0698 0.06980.0000 2.0000e-0050.0000 2.0000e-005 1.0000e-005Hauling 0.0000 1.9000e-0044.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5112.9455 112.9455 0.0185 0.0000 113.40760.0185 0.0000 113.4076Total 0.0753 0.6074 0.6750 1.3200e-0030.0291 0.02910.0285 0.0285 0.00000.0285 0.0285 0.0000 112.9455 112.94551.3200e-0030.0291 0.0291Off-Road 0.0753 0.6074 0.6750N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.59.2474 9.2474 2.8000e-0047.5000e-0049.47821.6000e-0041.5000e-0045.1594Total 2.6800e-0030.0126 0.0227 1.0000e-004 7.5600e-0031.5000e-0047.7200e-003 2.0400e-0031.4000e-0042.1900e-003 0.00003.0000e-0051.7000e-003 0.0000 5.1111 5.11116.0000e-005 6.2500e-0034.0000e-0056.2900e-003 1.6600e-003Worker 2.2500e-0031.6300e-0030.01924.0665 4.0665 1.2000e-0045.9000e-0044.24560.0000 1.0000e-0050.0732Vendor 4.3000e-0040.0107 3.5200e-003 4.0000e-005 1.2900e-0031.1000e-0041.4100e-003 3.7000e-0041.1000e-0044.8000e-004 0.00000.0000 1.0000e-005 0.0000 0.0698 0.06980.0000 2.0000e-0050.0000 2.0000e-005 1.0000e-005Hauling 0.0000 1.9000e-0044.0000e-005
Page 23 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.1101 3.1101 9.0000e-0054.5000e-0043.24670.0000 1.0000e-0050.0557Vendor 1.8000e-0046.8800e-0032.4300e-003 3.0000e-005 1.0300e-0034.0000e-0051.0700e-003 3.0000e-0044.0000e-0053.4000e-004 0.00000.0000 1.0000e-005 0.0000 0.0532 0.05320.0000 2.0000e-0050.0000 2.0000e-005 0.0000Hauling 0.0000 1.2000e-0043.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.589.8095 89.8095 0.0144 0.0000 90.16970.0144 0.0000 90.1697Total 0.0558 0.4476 0.5338 1.0500e-0030.0203 0.02030.0198 0.0198 0.00000.0198 0.0198 0.0000 89.8095 89.80951.0500e-0030.0203 0.0203Off-Road 0.0558 0.4476 0.5338N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.5 Temporary Access Trestle Installation - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.59.2474 9.2474 2.8000e-0047.5000e-0049.47821.6000e-0041.5000e-0045.1594Total 2.6800e-0030.0126 0.0227 1.0000e-004 7.5600e-0031.5000e-0047.7200e-003 2.0400e-0031.4000e-0042.1900e-003 0.00003.0000e-0051.7000e-003 0.0000 5.1111 5.11116.0000e-005 6.2500e-0034.0000e-0056.2900e-003 1.6600e-003Worker 2.2500e-0031.6300e-0030.01924.0665 4.0665 1.2000e-0045.9000e-0044.2456Vendor 4.3000e-0040.0107 3.5200e-003 4.0000e-005 1.2900e-0031.1000e-0041.4100e-003 3.7000e-0041.1000e-0044.8000e-004 0.0000
Page 24 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.2000e-0041.1000e-0043.96993.0000e-0051.3500e-003 0.0000 3.9343 3.93434.0000e-005 4.9700e-0033.0000e-0055.0000e-003 1.3200e-003Worker 1.6800e-0031.1600e-0030.01413.1101 3.1101 9.0000e-0054.5000e-0043.24670.0000 1.0000e-0050.0557Vendor 1.8000e-0046.8800e-0032.4300e-003 3.0000e-005 1.0300e-0034.0000e-0051.0700e-003 3.0000e-0044.0000e-0053.4000e-004 0.00000.0000 1.0000e-005 0.0000 0.0532 0.05320.0000 2.0000e-0050.0000 2.0000e-005 0.0000Hauling 0.0000 1.2000e-0043.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.589.8094 89.8094 0.0144 0.0000 90.16960.0144 0.0000 90.1696Total 0.0558 0.4476 0.5338 1.0500e-0030.0203 0.02030.0198 0.0198 0.00000.0198 0.0198 0.0000 89.8094 89.80941.0500e-0030.0203 0.0203Off-Road 0.0558 0.4476 0.5338N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.57.0975 7.0975 2.1000e-0045.7000e-0047.27241.2000e-0041.1000e-0043.9699Total 1.8600e-0038.1600e-0030.0166 7.0000e-005 6.0200e-0037.0000e-0056.0900e-003 1.6200e-0037.0000e-0051.7000e-003 0.00003.0000e-0051.3500e-003 0.0000 3.9343 3.93434.0000e-005 4.9700e-0033.0000e-0055.0000e-003 1.3200e-003Worker 1.6800e-0031.1600e-0030.0141
Page 25 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied17.6173 17.6173 5.3000e-0041.4100e-00318.05102.9000e-0042.7000e-0049.8607Total 4.6100e-0030.0202 0.0412 1.9000e-004 0.0149 1.7000e-0040.0151 4.0300e-0031.6000e-0044.1800e-003 0.00006.0000e-0053.3400e-003 0.0000 9.7722 9.77221.1000e-004 0.0124 7.0000e-0050.0124 3.2800e-003Worker 4.1600e-0032.8800e-0030.03517.7250 7.7250 2.3000e-0041.1200e-0038.06441.0000e-0052.0000e-0050.1259Vendor 4.5000e-0040.0171 6.0300e-003 8.0000e-005 2.5600e-0031.0000e-0042.6600e-003 7.4000e-0041.0000e-0048.3000e-004 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5325.7431 325.7431 0.0690 0.0000 327.46800.0690 0.0000 327.4680Total 0.1826 1.5139 1.7342 3.7800e-0030.0723 0.07230.0694 0.0694 0.00000.0694 0.0694 0.0000 325.7431 325.74313.7800e-0030.0723 0.0723Off-Road 0.1826 1.5139 1.7342N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.6 Permanent Pile Driving - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.57.0975 7.0975 2.1000e-0045.7000e-0047.2724Total 1.8600e-0038.1600e-0030.0166 7.0000e-005 6.0200e-0037.0000e-0056.0900e-003 1.6200e-0037.0000e-0051.7000e-003 0.0000
Page 26 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied17.6173 17.6173 5.3000e-0041.4100e-00318.05102.9000e-0042.7000e-0049.8607Total 4.6100e-0030.0202 0.0412 1.9000e-004 0.0149 1.7000e-0040.0151 4.0300e-0031.6000e-0044.1800e-003 0.00006.0000e-0053.3400e-003 0.0000 9.7722 9.77221.1000e-004 0.0124 7.0000e-0050.0124 3.2800e-003Worker 4.1600e-0032.8800e-0030.03517.7250 7.7250 2.3000e-0041.1200e-0038.06441.0000e-0052.0000e-0050.1259Vendor 4.5000e-0040.0171 6.0300e-003 8.0000e-005 2.5600e-0031.0000e-0042.6600e-003 7.4000e-0041.0000e-0048.3000e-004 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5325.7427 325.7427 0.0690 0.0000 327.46760.0690 0.0000 327.4676Total 0.1826 1.5139 1.7342 3.7800e-0030.0723 0.07230.0694 0.0694 0.00000.0694 0.0694 0.0000 325.7427 325.74273.7800e-0030.0723 0.0723Off-Road 0.1826 1.5139 1.7342N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 27 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction On-Site17.5614 17.5614 5.5000e-0041.4900e-00318.01992.7000e-0042.5000e-0049.2204Total 4.3500e-0030.0214 0.0392 1.8000e-004 0.0143 1.7000e-0040.0145 3.8500e-0031.7000e-0044.0300e-003 0.00006.0000e-0053.1300e-003 0.0000 9.1377 9.13771.0000e-004 0.0116 6.0000e-0050.0116 3.0700e-003Worker 3.8900e-0032.6900e-0030.03287.2234 7.2234 2.2000e-0041.0500e-0037.54086.0000e-0051.9000e-0041.2587Vendor 4.2000e-0040.0160 5.6400e-003 7.0000e-005 2.3900e-0039.0000e-0052.4800e-003 6.9000e-0049.0000e-0057.8000e-004 0.00002.0000e-0051.2000e-004 0.0000 1.2003 1.20031.0000e-005 3.4000e-0042.0000e-0053.6000e-004 9.0000e-005Hauling 4.0000e-0052.7100e-0037.2000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.599.7699 99.7699 0.0323 0.0000 100.57660.0323 0.0000 100.5766Total 0.0380 0.3508 0.2739 1.1400e-0030.0133 0.01330.0122 0.0122 0.00000.0122 0.0122 0.0000 99.7699 99.76991.1400e-0030.0133 0.0133Off-Road 0.0380 0.3508 0.2739N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.7 Install 72 Inch Line - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 28 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.8 Deck Structure Construction - 2023Unmitigated Construction On-Site17.5614 17.5614 5.5000e-0041.4900e-00318.01992.7000e-0042.5000e-0049.2204Total 4.3500e-0030.0214 0.0392 1.8000e-004 0.0143 1.7000e-0040.0145 3.8500e-0031.7000e-0044.0300e-003 0.00006.0000e-0053.1300e-003 0.0000 9.1377 9.13771.0000e-004 0.0116 6.0000e-0050.0116 3.0700e-003Worker 3.8900e-0032.6900e-0030.03287.2234 7.2234 2.2000e-0041.0500e-0037.54086.0000e-0051.9000e-0041.2587Vendor 4.2000e-0040.0160 5.6400e-003 7.0000e-005 2.3900e-0039.0000e-0052.4800e-003 6.9000e-0049.0000e-0057.8000e-004 0.00002.0000e-0051.2000e-004 0.0000 1.2003 1.20031.0000e-005 3.4000e-0042.0000e-0053.6000e-004 9.0000e-005Hauling 4.0000e-0052.7100e-0037.2000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.599.7698 99.7698 0.0323 0.0000 100.57650.0323 0.0000 100.5765Total 0.0380 0.3508 0.2739 1.1400e-0030.0133 0.01330.0122 0.0122 0.00000.0122 0.0122 0.0000 99.7698 99.76981.1400e-0030.0133 0.0133Off-Road 0.0380 0.3508 0.2739N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 29 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.518.5684 18.5684 5.6000e-0041.6600e-00319.07932.6000e-0042.4000e-0048.8362Total 4.3000e-0030.0243 0.0391 2.0000e-004 0.0143 1.9000e-0040.0145 3.8800e-0031.8000e-0044.0600e-003 0.00006.0000e-0053.0000e-003 0.0000 8.7569 8.75691.0000e-004 0.0111 6.0000e-0050.0111 2.9400e-003Worker 3.7300e-0032.5800e-0030.03159.6914 9.6914 2.9000e-0041.4000e-00310.11721.0000e-0052.0000e-0050.1259Vendor 5.7000e-0040.0214 7.5600e-003 1.0000e-004 3.2100e-0031.3000e-0043.3300e-003 9.3000e-0041.2000e-0041.0500e-003 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5164.0858 164.0858 0.0205 0.0000 164.59800.0205 0.0000 164.5980Total 0.1150 0.9084 1.1004 1.9300e-0030.0423 0.04230.0415 0.0415 0.00000.0415 0.0415 0.0000 164.0858 164.08581.9300e-0030.0423 0.0423Off-Road 0.1150 0.9084 1.1004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 30 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.9 Vault for Tunnel Isolation - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.518.5684 18.5684 5.6000e-0041.6600e-00319.07932.6000e-0042.4000e-0048.8362Total 4.3000e-0030.0243 0.0391 2.0000e-004 0.0143 1.9000e-0040.0145 3.8800e-0031.8000e-0044.0600e-003 0.00006.0000e-0053.0000e-003 0.0000 8.7569 8.75691.0000e-004 0.0111 6.0000e-0050.0111 2.9400e-003Worker 3.7300e-0032.5800e-0030.03159.6914 9.6914 2.9000e-0041.4000e-00310.11721.0000e-0052.0000e-0050.1259Vendor 5.7000e-0040.0214 7.5600e-003 1.0000e-004 3.2100e-0031.3000e-0043.3300e-003 9.3000e-0041.2000e-0041.0500e-003 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5164.0856 164.0856 0.0205 0.0000 164.59780.0205 0.0000 164.5978Total 0.1150 0.9084 1.1004 1.9300e-0030.0423 0.04230.0415 0.0415 0.00000.0415 0.0415 0.0000 164.0856 164.08561.9300e-0030.0423 0.0423Off-Road 0.1150 0.9084 1.1004Categorytons/yrMT/yr
Page 31 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.0116 0.0000 36.15100.0104 0.0104 0.0000 35.8611 35.86114.1000e-0040.0113 0.0113Off-Road 0.0249 0.2699 0.1298N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.515.3659 15.3659 5.0000e-0041.8600e-00315.93191.0000e-0049.0000e-0053.3616Total 2.1000e-0030.0277 0.0211 1.6000e-004 8.1300e-0031.9000e-0048.3100e-003 2.2500e-0031.8000e-0042.4200e-003 0.00002.0000e-0051.1400e-003 0.0000 3.3314 3.33144.0000e-005 4.2100e-0032.0000e-0054.2300e-003 1.1200e-003Worker 1.4200e-0039.8000e-0040.012010.5341 10.5341 3.2000e-0041.5300e-00310.99708.0000e-0052.4000e-0041.5734Vendor 6.2000e-0040.0233 8.2200e-003 1.1000e-004 3.4900e-0031.4000e-0043.6200e-003 1.0100e-0031.3000e-0041.1400e-003 0.00003.0000e-0051.4000e-004 0.0000 1.5004 1.50041.0000e-005 4.3000e-0043.0000e-0054.6000e-004 1.2000e-004Hauling 6.0000e-0053.3900e-0039.0000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.535.8611 35.8611 0.0116 0.0000 36.15110.0116 0.0000 36.1511Total 0.0249 0.2699 0.1298 4.1000e-0040.0113 0.01130.0104 0.0104 0.00000.0104 0.0104 0.0000 35.8611 35.86114.1000e-0040.0113 0.0113Off-Road 0.0249 0.2699 0.1298
Page 32 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied75.3241 75.3241 0.0121 0.0000 75.62620.0121 0.0000 75.6262Total 0.0468 0.3754 0.4477 8.8000e-0040.0170 0.01700.0166 0.0166 0.00000.0166 0.0166 0.0000 75.3241 75.32418.8000e-0040.0170 0.0170Off-Road 0.0468 0.3754 0.4477N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.10 Temporary Access Trestle Removal - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.515.3659 15.3659 5.0000e-0041.8600e-00315.93191.0000e-0049.0000e-0053.3616Total 2.1000e-0030.0277 0.0211 1.6000e-004 8.1300e-0031.9000e-0048.3100e-003 2.2500e-0031.8000e-0042.4200e-003 0.00002.0000e-0051.1400e-003 0.0000 3.3314 3.33144.0000e-005 4.2100e-0032.0000e-0054.2300e-003 1.1200e-003Worker 1.4200e-0039.8000e-0040.012010.5341 10.5341 3.2000e-0041.5300e-00310.99708.0000e-0052.4000e-0041.5734Vendor 6.2000e-0040.0233 8.2200e-003 1.1000e-004 3.4900e-0031.4000e-0043.6200e-003 1.0100e-0031.3000e-0041.1400e-003 0.00003.0000e-0051.4000e-004 0.0000 1.5004 1.50041.0000e-005 4.3000e-0043.0000e-0054.6000e-004 1.2000e-004Hauling 6.0000e-0053.3900e-0039.0000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.535.8611 35.8611 0.0116 0.0000 36.1510Total 0.0249 0.2699 0.1298 4.1000e-0040.0113 0.01130.0104 0.0104 0.0000
Page 33 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied75.3240 75.3240 0.0121 0.0000 75.62610.0121 0.0000 75.6261Total 0.0468 0.3754 0.4477 8.8000e-0040.0170 0.01700.0166 0.0166 0.00000.0166 0.0166 0.0000 75.3240 75.32408.8000e-0040.0170 0.0170Off-Road 0.0468 0.3754 0.4477N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56.0282 6.0282 1.9000e-0044.9000e-0046.17851.0000e-0049.0000e-0053.3296Total 1.5600e-0037.0100e-0030.0140 7.0000e-005 5.0600e-0035.0000e-0055.1300e-003 1.3700e-0035.0000e-0051.4200e-003 0.00002.0000e-0051.1300e-003 0.0000 3.2997 3.29974.0000e-005 4.1700e-0032.0000e-0054.1900e-003 1.1100e-003Worker 1.4100e-0039.7000e-0040.01192.6085 2.6085 8.0000e-0053.8000e-0042.72311.0000e-0052.0000e-0050.1259Vendor 1.5000e-0045.7700e-0032.0400e-003 3.0000e-005 8.6000e-0043.0000e-0059.0000e-004 2.5000e-0043.0000e-0052.8000e-004 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 34 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedUnmitigated Construction Off-Site107.0125 107.0125 0.0134 0.0000 107.34650.0134 0.0000 107.3465Total 0.0750 0.5924 0.7177 1.2600e-0030.0276 0.02760.0271 0.0271 0.00000.0271 0.0271 0.0000 107.0125 107.01251.2600e-0030.0276 0.0276Off-Road 0.0750 0.5924 0.7177N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.11 Construction and Installation of Intake Screen Structure - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56.0282 6.0282 1.9000e-0044.9000e-0046.17851.0000e-0049.0000e-0053.3296Total 1.5600e-0037.0100e-0030.0140 7.0000e-005 5.0600e-0035.0000e-0055.1300e-003 1.3700e-0035.0000e-0051.4200e-003 0.00002.0000e-0051.1300e-003 0.0000 3.2997 3.29974.0000e-005 4.1700e-0032.0000e-0054.1900e-003 1.1100e-003Worker 1.4100e-0039.7000e-0040.01192.6085 2.6085 8.0000e-0053.8000e-0042.72311.0000e-0052.0000e-0050.1259Vendor 1.5000e-0045.7700e-0032.0400e-003 3.0000e-005 8.6000e-0043.0000e-0059.0000e-004 2.5000e-0043.0000e-0052.8000e-004 0.00000.0000 1.0000e-005 0.0000 0.1200 0.12000.0000 3.0000e-0050.0000 4.0000e-005 1.0000e-005Hauling 0.0000 2.7000e-0047.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 35 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction Off-Site107.0123 107.0123 0.0134 0.0000 107.34640.0134 0.0000 107.3464Total 0.0750 0.5924 0.7177 1.2600e-0030.0276 0.02760.0271 0.0271 0.00000.0271 0.0271 0.0000 107.0123 107.01231.2600e-0030.0276 0.0276Off-Road 0.0750 0.5924 0.7177N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.510.2857 10.2857 3.1000e-0048.2000e-00410.53871.7000e-0041.6000e-0045.7628Total 2.6900e-0030.0118 0.0241 1.1000e-004 8.7300e-0031.0000e-0048.8300e-003 2.3500e-0031.0000e-0042.4500e-003 0.00004.0000e-0051.9500e-003 0.0000 5.7110 5.71106.0000e-005 7.2200e-0034.0000e-0057.2600e-003 1.9200e-003Worker 2.4300e-0031.6800e-0030.02054.5146 4.5146 1.4000e-0046.5000e-0044.71300.0000 1.0000e-0050.0629Vendor 2.6000e-0049.9900e-0033.5200e-003 5.0000e-005 1.4900e-0036.0000e-0051.5500e-003 4.3000e-0046.0000e-0054.9000e-004 0.00000.0000 1.0000e-005 0.0000 0.0600 0.06000.0000 2.0000e-0050.0000 2.0000e-005 0.0000Hauling 0.0000 1.4000e-0044.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 36 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.556.0261 56.0261 0.0111 0.0000 56.30450.0111 0.0000 56.3045Total 0.0347 0.2531 0.2956 6.6000e-0040.0110 0.01100.0107 0.0107 0.00000.0107 0.0107 0.0000 56.0261 56.02616.6000e-0040.0110 0.0110Off-Road 0.0347 0.2531 0.2956N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.12 Plant Shutdown - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.510.2857 10.2857 3.1000e-0048.2000e-00410.53871.7000e-0041.6000e-0045.7628Total 2.6900e-0030.0118 0.0241 1.1000e-004 8.7300e-0031.0000e-0048.8300e-003 2.3500e-0031.0000e-0042.4500e-003 0.00004.0000e-0051.9500e-003 0.0000 5.7110 5.71106.0000e-005 7.2200e-0034.0000e-0057.2600e-003 1.9200e-003Worker 2.4300e-0031.6800e-0030.02054.5146 4.5146 1.4000e-0046.5000e-0044.71300.0000 1.0000e-0050.0629Vendor 2.6000e-0049.9900e-0033.5200e-003 5.0000e-005 1.4900e-0036.0000e-0051.5500e-003 4.3000e-0046.0000e-0054.9000e-004 0.00000.0000 1.0000e-005 0.0000 0.0600 0.06000.0000 2.0000e-0050.0000 2.0000e-005 0.0000Hauling 0.0000 1.4000e-0044.0000e-005N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 37 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.556.0261 56.0261 0.0111 0.0000 56.30440.0111 0.0000 56.3044Total 0.0347 0.2531 0.2956 6.6000e-0040.0110 0.01100.0107 0.0107 0.00000.0107 0.0107 0.0000 56.0261 56.02616.6000e-0040.0110 0.0110Off-Road 0.0347 0.2531 0.2956N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56.1229 6.1229 2.0000e-0045.3000e-0046.28689.0000e-0058.0000e-0053.0957Total 1.4300e-0037.7000e-0030.0129 7.0000e-005 5.0100e-0036.0000e-0055.0700e-003 1.3600e-0036.0000e-0051.4100e-003 0.00002.0000e-0051.0800e-003 0.0000 3.0689 3.06893.0000e-005 4.0100e-0032.0000e-0054.0300e-003 1.0700e-003Worker 1.2700e-0038.4000e-0040.01072.4644 2.4644 8.0000e-0053.6000e-0042.57283.0000e-0059.0000e-0050.6183Vendor 1.4000e-0045.5100e-0031.9100e-003 3.0000e-005 8.3000e-0043.0000e-0058.6000e-004 2.4000e-0043.0000e-0052.7000e-004 0.00001.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004Categorytons/yrMT/yr
Page 38 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eCategorytons/yrMT/yrExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.0510 0.0000 160.6087Unmitigated Construction Off-Site0.0229 0.0229 0.0000 159.3336 159.33361.8200e-003 0.0000 0.0249 0.0249 0.0000Total 0.0672 0.6352 0.6568159.3336 159.3336 0.0510 0.0000 160.60870.0000 0.0000 0.0000Off-Road 0.0672 0.6352 0.6568 1.8200e-0030.0249 0.02490.0229 0.0229 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.13 Demolition of Existing Tunnels - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56.1229 6.1229 2.0000e-0045.3000e-0046.28689.0000e-0058.0000e-0053.0957Total 1.4300e-0037.7000e-0030.0129 7.0000e-005 5.0100e-0036.0000e-0055.0700e-003 1.3600e-0036.0000e-0051.4100e-003 0.00002.0000e-0051.0800e-003 0.0000 3.0689 3.06893.0000e-005 4.0100e-0032.0000e-0054.0300e-003 1.0700e-003Worker 1.2700e-0038.4000e-0040.01072.4644 2.4644 8.0000e-0053.6000e-0042.57283.0000e-0059.0000e-0050.6183Vendor 1.4000e-0045.5100e-0031.9100e-003 3.0000e-005 8.3000e-0043.0000e-0058.6000e-004 2.4000e-0043.0000e-0052.7000e-004 0.00001.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004
Page 39 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eCategorytons/yrMT/yrExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.0510 0.0000 160.6085Mitigated Construction Off-Site0.0229 0.0229 0.0000 159.3334 159.33341.8200e-003 0.0000 0.0249 0.0249 0.0000Total 0.0672 0.6352 0.6568159.3334 159.3334 0.0510 0.0000 160.60850.0000 0.0000 0.0000Off-Road 0.0672 0.6352 0.6568 1.8200e-0030.0249 0.02490.0229 0.0229 0.00000.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.524.4936 24.4936 7.4000e-0041.9900e-00325.10613.7000e-0043.6000e-00413.3734Total 6.1200e-0030.0288 0.0546 2.6000e-004 0.0211 2.4000e-0040.0213 5.6900e-0032.3000e-0045.9200e-003 0.00008.0000e-0054.6900e-003 0.0000 13.2576 13.25761.4000e-004 0.0173 9.0000e-0050.0174 4.6000e-003Worker 5.4900e-0033.6300e-0030.046010.6464 10.6464 3.4000e-0041.5400e-00311.11443.0000e-0059.0000e-0050.6183Vendor 6.1000e-0040.0238 8.2600e-003 1.1000e-004 3.5900e-0031.4000e-0043.7300e-003 1.0400e-0031.4000e-0041.1700e-003 0.00001.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004
Page 40 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.0000e-0059.0000e-0050.61831.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51.5108 1.5108 4.9000e-0040.0000 1.52304.9000e-0040.0000 1.5230Total 1.0600e-0039.9400e-0030.0128 2.0000e-005 5.7000e-0045.7000e-0045.3000e-0045.3000e-004 0.00005.3000e-0045.3000e-004 0.0000 1.5108 1.51082.0000e-0055.7000e-0045.7000e-004Off-Road 1.0600e-0039.9400e-0030.0128N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.14 Demobilization - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.524.4936 24.4936 7.4000e-0041.9900e-00325.10613.7000e-0043.6000e-00413.3734Total 6.1200e-0030.0288 0.0546 2.6000e-004 0.0211 2.4000e-0040.0213 5.6900e-0032.3000e-0045.9200e-003 0.00008.0000e-0054.6900e-003 0.0000 13.2576 13.25761.4000e-004 0.0173 9.0000e-0050.0174 4.6000e-003Worker 5.4900e-0033.6300e-0030.046010.6464 10.6464 3.4000e-0041.5400e-00311.11443.0000e-0059.0000e-0050.6183Vendor 6.1000e-0040.0238 8.2600e-003 1.1000e-004 3.5900e-0031.4000e-0043.7300e-003 1.0400e-0031.4000e-0041.1700e-003 0.00001.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004
Page 41 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.7744 1.7744 6.0000e-0052.6000e-0041.85243.0000e-0059.0000e-0050.6183Vendor 1.0000e-0043.9700e-0031.3800e-003 2.0000e-005 6.0000e-0042.0000e-0056.2000e-004 1.7000e-0042.0000e-0052.0000e-004 0.00001.0000e-0056.0000e-005 0.0000 0.5896 0.58961.0000e-005 1.7000e-0041.0000e-0051.8000e-004 5.0000e-005Hauling 2.0000e-0051.3500e-0033.7000e-004N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51.5108 1.5108 4.9000e-0040.0000 1.52304.9000e-0040.0000 1.5230Total 1.0600e-0039.9400e-0030.0128 2.0000e-005 5.7000e-0045.7000e-0045.3000e-0045.3000e-004 0.00005.3000e-0045.3000e-004 0.0000 1.5108 1.51082.0000e-0055.7000e-0045.7000e-004Off-Road 1.0600e-0039.9400e-0030.0128N2O CO2eCategorytons/yrMT/yrPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.54.5736 4.5736 1.5000e-0044.1000e-0044.69966.0000e-0056.0000e-0052.2289Total 1.0300e-0035.9300e-0039.4100e-003 5.0000e-005 3.6600e-0035.0000e-0053.7000e-003 9.9000e-0044.0000e-0051.0400e-003 0.00001.0000e-0057.8000e-004 0.0000 2.2096 2.20962.0000e-005 2.8900e-0032.0000e-0052.9000e-003 7.7000e-004Worker 9.1000e-0046.1000e-0047.6600e-0031.7744 1.7744 6.0000e-0052.6000e-0041.8524Vendor 1.0000e-0043.9700e-0031.3800e-003 2.0000e-005 6.0000e-0042.0000e-0056.2000e-004 1.7000e-0042.0000e-0052.0000e-004 0.0000
Page 42 of 42CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:24 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, AnnualEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied4.5736 4.5736 1.5000e-0044.1000e-0044.69966.0000e-0056.0000e-0052.2289Total 1.0300e-0035.9300e-0039.4100e-003 5.0000e-005 3.6600e-0035.0000e-0053.7000e-003 9.9000e-0044.0000e-0051.0400e-003 0.00001.0000e-0057.8000e-004 0.0000 2.2096 2.20962.0000e-005 2.8900e-0032.0000e-0052.9000e-003 7.7000e-004Worker 9.1000e-0046.1000e-0047.6600e-003
Page 1 of 40Off-road Equipment - No Landside EquipmentOff-road Equipment - info provided by clientOff-road Equipment - Mobilization: applicant provided project-specific detail.Off-road Equipment - Permanent Pile Driving: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - Construction and Installation of Intake Screen Structure: applicant provided project-specific detail.Off-road Equipment - Deck Structure Construction: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - provided by clientOff-road Equipment - Dredge Material Hauling phase included to account for dust and trips from hauling of dredged material during Turbidity Curtain Construction.0.0041.3 User Entered Comments & Non-Default DataProject Characteristics - Land Use - Applicant provided project specific detail.Construction Phase - Applicant provided project specific detail.CO2 Intensity (lb/MWhr)539.98CH4 Intensity (lb/MWhr)0.033N2O Intensity (lb/MWhr)Climate Zone13Operational Year2023Utility CompanySan Diego Gas & Electric01.2 Other Project CharacteristicsUrbanizationUrbanWind Speed (m/s)2.6Precipitation Freq (Days)40User Defined Industrial1.00User Defined Unit2.000.00Carlsbad Desalination Alternative 22San Diego County APCD Air District, Summer1.0 Project Characteristics1.1 Land UsageLand UsesSizeMetricLot Acreage Floor Surface Area PopulationCalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Page 2 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDays200.0018.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDays200.0025.00tblConstructionPhaseNumDays20.00108.00tblConstructionPhaseNumDays200.0026.00tblConstructionPhaseNumDays200.0045.00tblConstructionPhaseNumDays200.0069.00tblConstructionPhaseNumDays200.00105.00tblConstructionPhaseNumDays200.0077.00tblConstructionPhaseNumDays200.0072.00tblConstructionPhaseNumDays20.0027.00tblConstructionPhaseNumDays200.0070.00tblConstructionPhaseNumDays2.0014.00tblConstructionPhaseNumDays200.0014.00tblAreaCoatingArea_EF_Residential_Exterior25050tblAreaCoatingArea_EF_Residential_Interior25050tblAreaCoatingArea_EF_Nonresidential_Exterior25050tblAreaCoatingArea_EF_Nonresidential_Interior25050Demolition - Area Coating - NATable NameColumn NameDefault ValueNew ValueOff-road Equipment - Temporary Access Trestle Installation: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - Turbidity Curtain Construction: applicant provided project-specific detail. Included "grader" to account for dredged material movement in CalEEMod.Off-road Equipment - provided by clientTrips and VMT - Dredging Phase - 2,200 CY of dredge. 16CY of material per truck. 137.5 one way trucks. 275 total truck trips
Page 3 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentLoadFactor0.370.45tblOffRoadEquipmentLoadFactor0.560.20tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.500.29tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.500.45tblOffRoadEquipmentLoadFactor0.420.25tblOffRoadEquipmentLoadFactor0.200.50tblOffRoadEquipmentLoadFactor0.360.45tblOffRoadEquipmentHorsePower65.0070.00tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower9.0020.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower221.00231.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower221.00469.00tblOffRoadEquipmentHorsePower172.00100.00tblOffRoadEquipmentHorsePower158.0045.00tblOffRoadEquipmentHorsePower203.00168.00tblConstructionPhaseNumDaysWeek5.007.00tblLandUseLotAcreage0.002.00tblConstructionPhaseNumDaysWeek5.007.00
Page 4 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00
Page 5 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00
Page 6 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00
Page 7 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0014.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0046.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.002.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0050.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.0040.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.00165.00tblTripsAndVMTHaulingTripNumber0.00275.00tblTripsAndVMTHaulingTripLength20.0025.40tblTripsAndVMTHaulingTripNumber0.0050.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00
Page 8 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied13,450.630313,450.63032.9947 0.0979 13,550.83841.1103 0.3241 8,243.87792023 6.0404 50.1379 54.9035 0.1400 0.8305 2.2557 3.0589 0.2241 2.1499 2.3661 0.00001.4893 1.7517 0.0000 8,158.0558 8,158.05580.0845 0.9718 1.5245 2.4963 0.26242022 4.1829 34.0295 37.4456N2O CO2eYearlb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH42.0 Emissions Summary2.1 Overall Construction (Maximum Daily Emission)Unmitigated ConstructionROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5tblTripsAndVMTWorkerTripNumber15.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber8.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00
Page 9 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedNum Days WeekNum DaysPhase Description1 MobilizationSite Preparation9/7/2022 9/20/20227 14Phase NumberPhase NamePhase TypeStart Date End Date3.0 Construction DetailConstruction Phase0.00 0.00 0.00N20 CO2ePercent Reduction0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00PM2.5 TotalBio- CO2 NBio-CO2 Total CO2 CH4Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5ROG NOx CO SO213,450.630313,450.63032.9947 0.3241 13,550.83841.0559 0.0498 5,532.4889Maximum 6.0404 50.1379 54.9035 0.1400 0.9718 2.2557 3.0589 0.2624 2.1499 2.3661 0.00000.8595 0.9700 0.0000 5,493.6474 5,493.64740.0578 0.4158 0.8884 1.2988 0.11202024 2.8899 20.8391 24.724213,450.630313,450.63032.9947 0.0979 13,550.83841.1103 0.3241 8,243.87792023 6.0404 50.1379 54.9035 0.1400 0.8305 2.2557 3.0589 0.2241 2.1499 2.3661 0.00001.4893 1.7517 0.0000 8,158.0558 8,158.05580.0845 0.9718 1.5245 2.4963 0.26242022 4.1829 34.0295 37.4456N2O CO2eYearlb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated ConstructionROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.513,450.630313,450.63032.9947 0.3241 13,550.83841.0559 0.0498 5,532.4889Maximum 6.0404 50.1379 54.9035 0.1400 0.9718 2.2557 3.0589 0.2624 2.1499 2.3661 0.00000.8595 0.9700 0.0000 5,493.6474 5,493.64740.0578 0.4158 0.8884 1.2988 0.11202024 2.8899 20.8391 24.7242
Page 10 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.20Turbidity Curtain ConstructionForklifts110.00890.48Turbidity Curtain ConstructionCranes110.002310.29Turbidity Curtain ConstructionAir Compressors410.00780.37Turbidity Curtain ConstructionAerial Lifts210.00630.31MobilizationTractors/Loaders/Backhoes00.00970.50MobilizationRubber Tired Loaders110.001680.45MobilizationForklifts110.0089Load FactorMobilizationExcavators110.00450.45Phase NameOffroad Equipment TypeAmountUsage Hours Horse PowerAcres of Grading (Site Preparation Phase): 0Acres of Grading (Grading Phase): 0Acres of Paving: 0Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural Coating – OffRoad Equipment5 10813 DemobilizationBuilding Construction7/8/2024 7/31/20245 1812 Demolition of Existing Tunnels Demolition2/7/2024 7/7/20247 4511 Plant ShutdownBuilding Construction1/3/2024 2/6/20245 2510 Construction and Installation of Intake Screen StructureBuilding Construction8/30/2023 10/13/20235 1059 Temporary Access Trestle Removal Building Construction6/27/2023 8/1/20235 268 Vault for Tunnel IsolationBuilding Construction6/26/2023 11/17/20235 727 Deck Structure Construction Building Construction4/19/2023 6/26/20237 696 Install 72 Inch LineBuilding Construction3/15/2023 6/22/20237 705 Permanent Pile DrivingBuilding Construction2/1/2023 4/18/20237 774 Temporary Access Trestle InstallationBuilding Construction11/23/2022 1/31/20237 143 Dredging/ExcavationDemolition11/16/2022 12/22/20225 272 Turbidity Curtain Construction Building Construction11/2/2022 11/15/2022
Page 11 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.37Install 72 Inch LineTractors/Loaders/Backhoes00.00970.20Install 72 Inch LineGenerator Sets00.00840.74Install 72 Inch LineForklifts00.00890.29Install 72 Inch LineExcavators110.003450.45Install 72 Inch LineCranes110.002490.45Install 72 Inch LineBore/Drill Rigs110.002310.29Permanent Pile DrivingWelders210.00460.25Permanent Pile DrivingTractors/Loaders/Backhoes00.00970.37Permanent Pile DrivingOther Construction Equipment310.001000.20Permanent Pile DrivingGenerator Sets210.00840.74Permanent Pile DrivingForklifts110.00890.45Permanent Pile DrivingCranes110.002310.29Permanent Pile DrivingBore/Drill Rigs110.004690.48Permanent Pile DrivingBore/Drill Rigs110.002210.50Permanent Pile DrivingAir Compressors410.00780.45Permanent Pile DrivingAerial Lifts210.00630.31Temporary Access Trestle Installation Welders210.00460.74Temporary Access Trestle Installation Tractors/Loaders/Backhoes00.00970.37Temporary Access Trestle Installation Generator Sets210.00840.29Temporary Access Trestle Installation Forklifts110.00890.20Temporary Access Trestle Installation Cranes110.002310.48Temporary Access Trestle Installation Bore/Drill Rigs110.002210.50Temporary Access Trestle Installation Air Compressors410.00780.37Temporary Access Trestle Installation Aerial Lifts210.00630.31Dredging/ExcavationTractors/Loaders/Backhoes00.00970.73Dredging/ExcavationRubber Tired Dozers00.002470.40Dredging/ExcavationConcrete/Industrial Saws00.00810.37Turbidity Curtain ConstructionWelders210.00460.45Turbidity Curtain ConstructionTractors/Loaders/Backhoes00.0097Turbidity Curtain ConstructionGenerator Sets210.00840.74
Page 12 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.29Construction and Installation of Intake Screen StructureForklifts110.00890.20Construction and Installation of Intake Screen StructureCranes110.002310.31Construction and Installation of Intake Screen StructureAir Compressors410.00780.48Construction and Installation of Intake Screen StructureAerial Lifts210.00630.37Temporary Access Trestle Removal Welders210.00460.45Temporary Access Trestle Removal Tractors/Loaders/Backhoes00.00970.20Temporary Access Trestle Removal Generator Sets210.00840.74Temporary Access Trestle Removal Forklifts110.00890.50Temporary Access Trestle Removal Cranes110.002310.29Temporary Access Trestle Removal Bore/Drill Rigs110.002210.31Temporary Access Trestle Removal Air Compressors410.00780.48Temporary Access Trestle Removal Aerial Lifts210.00630.37Vault for Tunnel IsolationWelders00.00460.45Vault for Tunnel IsolationTractors/Loaders/Backhoes00.00970.20Vault for Tunnel IsolationGenerator Sets00.00840.74Vault for Tunnel IsolationForklifts00.00890.29Vault for Tunnel IsolationExcavators00.003450.45Vault for Tunnel IsolationCranes110.002490.45Vault for Tunnel IsolationAir Compressors00.00780.48Deck Structure ConstructionWelders210.00460.74Deck Structure ConstructionTractors/Loaders/Backhoes00.00970.37Deck Structure ConstructionGenerator Sets210.00840.29Deck Structure ConstructionForklifts110.00890.20Deck Structure ConstructionCranes110.002310.31Deck Structure ConstructionAir Compressors410.00780.48Deck Structure ConstructionAerial Lifts210.0063Install 72 Inch LineWelders00.00460.45
Page 13 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedHauling Vehicle ClassMobilization340.00 10.00 50.0010.807.30 20.00 LD_MixHDT_Mix HHDT0.45Trips and VMTPhase Name Offroad Equipment CountWorker Trip NumberVendor Trip NumberHauling Trip NumberWorker Trip LengthVendor Trip LengthHauling Trip LengthWorker Vehicle ClassVendor Vehicle ClassDemobilizationWelders00.00460.74DemobilizationTractors/Loaders/Backhoes00.00970.37DemobilizationGenerator Sets00.00840.29DemobilizationForklifts110.00890.20DemobilizationCranes00.002310.45Demolition of Existing TunnelsTractors/Loaders/Backhoes00.00970.37Demolition of Existing TunnelsSkid Steer Loaders210.00700.20Demolition of Existing TunnelsRubber Tired Dozers00.002470.40Demolition of Existing TunnelsForklifts110.00890.29Demolition of Existing TunnelsExcavators110.003450.45Demolition of Existing TunnelsCranes110.002490.20Demolition of Existing TunnelsConcrete/Industrial Saws00.00810.73Demolition of Existing TunnelsCement and Mortar Mixers110.00200.37Plant ShutdownWelders210.00460.45Plant ShutdownTractors/Loaders/Backhoes00.00970.20Plant ShutdownGenerator Sets00.00840.74Plant ShutdownForklifts110.00890.29Plant ShutdownExcavators110.003450.45Plant ShutdownCranes110.002490.45Plant ShutdownAir Compressors410.00780.48Construction and Installation of Intake Screen StructureWelders210.00460.74Construction and Installation of Intake Screen StructureTractors/Loaders/Backhoes00.00970.37Construction and Installation of Intake Screen StructureGenerator Sets210.0084
Page 14 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.47931,494.05020.4747 0.47471,482.0669 1,482.06690.0153 0.0000 0.5160 0.5160 0.0000Total 1.0599 9.1454 11.01681,482.0669 1,482.0669 0.47931,494.05020.0000Off-Road 1.0599 9.1454 11.0168 0.01530.5160 0.51600.4747 0.47470.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.1 Mitigation Measures Construction3.2 Mobilization - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5HHDTDemobilization140.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixDemolition of Existing Tunnels640.00 10.00 20.00HHDTPlant Shutdown940.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixConstruction and Installation of Intake Screen Structure1240.00 10.00 2.00HHDTTemporary Access Trestle Removal1340.00 10.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixVault for Tunnel Isolation110.00 10.00 50.00HHDTDeck Structure Construction1240.00 14.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixInstall 72 Inch Line340.00 10.00 40.00HHDTPermanent Pile Driving1740.00 10.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixTemporary Access Trestle Installation1340.00 10.00 4.00HHDTDredging/Excavation040.00 10.00 275.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 25.40 LD_MixHDT_MixTurbidity Curtain Construction1240.00 46.00 165.00
Page 15 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.47931,494.05020.4747 0.4747 0.0000 1,482.0669 1,482.06690.0153 0.0000 0.5160 0.5160 0.0000Total 1.0599 9.1454 11.01681,482.0669 1,482.0669 0.47931,494.05020.0000Off-Road 1.0599 9.1454 11.0168 0.01530.5160 0.51600.4747 0.4747 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5779.6300 779.6300 0.0276 0.0804 804.28438.7600e-0037.8600e-003305.6456Total 0.1550 1.1878 1.3546 7.3700e-0030.4588 0.0132 0.4720 0.1238 0.0126 0.13641.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.94140.0119 0.0392 258.6973Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.02505.3500e-0030.0225246.7213 246.72132.2400e-0030.0625 5.5900e-0030.0681 0.0171Hauling 0.0160 0.5800 0.1410CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx COUnmitigated Construction Off-Site
Page 16 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedUnmitigated Construction Off-Site5,242.7272 5,242.7272 0.67555,259.61420.67555,259.6142Total 3.5788 28.3174 32.0626 0.05601.4023 1.40231.3758 1.37581.3758 1.37585,242.7272 5,242.72720.05601.4023 1.4023Off-Road 3.5788 28.3174 32.0626N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.3 Turbidity Curtain Construction - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5779.6300 779.6300 0.0276 0.0804 804.28438.7600e-0037.8600e-003305.6456Total 0.1550 1.1878 1.3546 7.3700e-0030.4588 0.0132 0.4720 0.1238 0.0126 0.13641.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.94140.0119 0.0392 258.6973Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.02505.3500e-0030.0225246.7213 246.72132.2400e-0030.0625 5.5900e-0030.0681 0.0171Hauling 0.0160 0.5800 0.1410CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx COMitigated Construction Off-Site
Page 17 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7272 5,242.7272 0.67555,259.61420.67555,259.6142Total 3.5788 28.3174 32.0626 0.05601.4023 1.40231.3758 1.3758 0.00001.3758 1.3758 0.0000 5,242.7272 5,242.72720.05601.4023 1.4023Off-Road 3.5788 28.3174 32.0626N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.52,385.1643 2,385.1643 0.0904 0.3241 2,484.01448.7600e-0037.8600e-003305.6456Total 0.2829 4.8941 2.4012 0.0221 0.9019 0.0518 0.9537 0.2486 0.0495 0.29811.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.03571,057.1979 1,057.1979 0.0321 0.1535 1,103.73050.0495 0.1628 1,074.6382Vendor 0.1025 2.4463 0.8184 9.8100e-0030.3115 0.0266 0.3381 0.0897 0.0254 0.11510.0224 0.09411,024.8833 1,024.88339.3100e-0030.2617 0.0234 0.2851 0.0717Hauling 0.0637 2.3718 0.5471N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 18 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.00000.0000Unmitigated Construction Off-Site0.0000 0.00000.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.00000.00000.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.4 Dredging/Excavation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.52,385.1643 2,385.1643 0.0904 0.3241 2,484.01448.7600e-0037.8600e-003305.6456Total 0.2829 4.8941 2.4012 0.0221 0.9019 0.0518 0.9537 0.2486 0.0495 0.29811.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.03571,057.1979 1,057.1979 0.0321 0.1535 1,103.73050.0495 0.1628 1,074.6382Vendor 0.1025 2.4463 0.8184 9.8100e-0030.3115 0.0266 0.3381 0.0897 0.0254 0.11510.0224 0.09411,024.8833 1,024.88339.3100e-0030.2617 0.0234 0.2851 0.0717Hauling 0.0637 2.3718 0.5471Categorylb/daylb/day
Page 19 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.0338 0.1118 737.76630.0152 0.0641703.6125 703.61256.3900e-0030.1781 0.0159 0.1941 0.0488Hauling 0.0457 1.6542 0.4021CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.00000.0000Mitigated Construction Off-Site0.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.00000.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.0000 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51,236.5213 1,236.5213 0.0496 0.1530 1,283.35338.7600e-0037.8600e-003305.6456Total 0.1847 2.2620 1.6157 0.0115 0.5745 0.0236 0.5980 0.1555 0.0225 0.17801.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.94140.0338 0.1118 737.7663Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.02500.0152 0.0641703.6125 703.61256.3900e-0030.1781 0.0159 0.1941 0.0488Hauling 0.0457 1.6542 0.4021
Page 20 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied8.7600e-0037.8600e-003305.64561.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.94141.9000e-0046.3000e-0044.1392Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.02509.0000e-0053.6000e-0043.9475 3.94754.0000e-0051.0000e-0039.0000e-0051.0900e-003 2.7000e-004Hauling 2.6000e-0049.2800e-0032.2600e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,384.6782 6,384.6782 1.04486,410.79841.04486,410.7984Total 3.8589 31.1505 34.6140 0.06781.4932 1.49321.4595 1.45951.4595 1.45956,384.6782 6,384.67820.06781.4932 1.4932Off-Road 3.8589 31.1505 34.6140N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.5 Temporary Access Trestle Installation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51,236.5213 1,236.5213 0.0496 0.1530 1,283.35338.7600e-0037.8600e-003305.6456Total 0.1847 2.2620 1.6157 0.0115 0.5745 0.0236 0.5980 0.1555 0.0225 0.17801.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.9414Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.0250
Page 21 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied536.8563 536.8563 0.0159 0.0419 549.72628.7600e-0037.8600e-003305.6456Total 0.1393 0.6171 1.2159 5.1700e-0030.3973 7.7300e-0030.4051 0.1069 7.3300e-0030.11431.7100e-0030.0889303.0831 303.08313.0000e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1167 0.0760 1.0357229.8256 229.8256 6.9900e-0030.0334 239.94141.9000e-0046.3000e-0044.1392Vendor 0.0223 0.5318 0.1779 2.1300e-0030.0677 5.7800e-0030.0735 0.0195 5.5300e-0030.02509.0000e-0053.6000e-0043.9475 3.94754.0000e-0051.0000e-0039.0000e-0051.0900e-003 2.7000e-004Hauling 2.6000e-0049.2800e-0032.2600e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,384.6782 6,384.6782 1.04486,410.79841.04486,410.7984Total 3.8589 31.1505 34.6140 0.06781.4932 1.49321.4595 1.4595 0.00001.4595 1.4595 0.0000 6,384.6782 6,384.67820.06781.4932 1.4932Off-Road 3.8589 31.1505 34.6140N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5536.8563 536.8563 0.0159 0.0419 549.7262Total 0.1393 0.6171 1.2159 5.1700e-0030.3973 7.7300e-0030.4051 0.1069 7.3300e-0030.1143
Page 22 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction On-Site518.2913 518.2913 0.0148 0.0399 530.55937.9500e-0037.3200e-003295.8445Total 0.1214 0.5040 1.1165 4.9800e-0030.3973 4.4300e-0030.4018 0.1069 4.1800e-0030.11111.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.9000e-0046.0000e-0043.9626Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02206.0000e-0053.3000e-0043.7787 3.77873.0000e-0051.0000e-0036.0000e-0051.0600e-003 2.7000e-004Hauling 1.3000e-0047.4800e-0032.0500e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9674 6,386.9674 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.27921.2792 1.27926,386.9674 6,386.96740.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.5 Temporary Access Trestle Installation - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 23 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.6 Permanent Pile Driving - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5518.2913 518.2913 0.0148 0.0399 530.55937.9500e-0037.3200e-003295.8445Total 0.1214 0.5040 1.1165 4.9800e-0030.3973 4.4300e-0030.4018 0.1069 4.1800e-0030.11111.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.9000e-0046.0000e-0043.9626Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02206.0000e-0053.3000e-0043.7787 3.77873.0000e-0051.0000e-0036.0000e-0051.0600e-003 2.7000e-004Hauling 1.3000e-0047.4800e-0032.0500e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9673 6,386.9673 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.2792 0.00001.2792 1.2792 0.0000 6,386.9673 6,386.96730.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 24 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.97549,375.88631.8023 1.8023 0.0000 9,326.5015 9,326.50150.09821.8781 1.8781Off-Road 4.7425 39.3219 45.0436N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5517.9478 517.9478 0.0148 0.0399 530.19907.9500e-0037.3200e-003295.8445Total 0.1214 0.5034 1.1163 4.9800e-0030.3972 4.4300e-0030.4017 0.1069 4.1800e-0030.11111.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.7000e-0045.5000e-0043.6023Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02206.0000e-0053.0000e-0043.4352 3.43523.0000e-0059.1000e-0046.0000e-0059.7000e-004 2.5000e-004Hauling 1.2000e-0046.8000e-0031.8700e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.59,326.5015 9,326.5015 1.97549,375.88631.97549,375.8863Total 4.7425 39.3219 45.0436 0.09821.8781 1.87811.8023 1.80231.8023 1.80239,326.5015 9,326.50150.09821.8781 1.8781Off-Road 4.7425 39.3219 45.0436Categorylb/daylb/day
Page 25 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3,054.9308 3,054.9308 0.98803,079.63150.98803,079.6315Total 1.0540 9.7435 7.6092 0.03160.3681 0.36810.3387 0.33870.3387 0.33873,054.9308 3,054.93080.03160.3681 0.3681Off-Road 1.0540 9.7435 7.6092N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.7 Install 72 Inch Line - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5517.9478 517.9478 0.0148 0.0399 530.19907.9500e-0037.3200e-003295.8445Total 0.1214 0.5034 1.1163 4.9800e-0030.3972 4.4300e-0030.4017 0.1069 4.1800e-0030.11111.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.7000e-0045.5000e-0043.6023Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02206.0000e-0053.0000e-0043.4352 3.43523.0000e-0059.1000e-0046.0000e-0059.7000e-004 2.5000e-004Hauling 1.2000e-0046.8000e-0031.8700e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.59,326.5015 9,326.5015 1.97549,375.8863Total 4.7425 39.3219 45.0436 0.09821.8781 1.87811.8023 1.8023 0.0000
Page 26 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction Off-Site3,054.9308 3,054.9308 0.98803,079.63150.98803,079.6315Total 1.0540 9.7435 7.6092 0.03160.3681 0.36810.3387 0.3387 0.00000.3387 0.3387 0.0000 3,054.9308 3,054.93080.03160.3681 0.3681Off-Road 1.0540 9.7435 7.6092N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5551.2502 551.2502 0.0165 0.0452 565.12167.9500e-0037.3200e-003295.8445Total 0.1225 0.5692 1.1344 5.2800e-0030.4060 4.9900e-0030.4110 0.1093 4.7100e-0030.11401.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.8500e-0035.8400e-00338.5249Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.9000e-0043.2500e-00336.7376 36.73763.3000e-0049.7200e-0036.2000e-0040.0103 2.6600e-003Hauling 1.2600e-0030.0727 0.0200N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 27 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.20331.2033 1.20335,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.8 Deck Structure Construction - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5551.2502 551.2502 0.0165 0.0452 565.12167.9500e-0037.3200e-003295.8445Total 0.1225 0.5692 1.1344 5.2800e-0030.4060 4.9900e-0030.4110 0.1093 4.7100e-0030.11401.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.8500e-0035.8400e-00338.5249Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.9000e-0043.2500e-00336.7376 36.73763.3000e-0049.7200e-0036.2000e-0040.0103 2.6600e-003Hauling 1.2600e-0030.0727 0.0200N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 28 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.9000e-0046.1000e-0044.02006.0000e-0053.4000e-0043.8335 3.83353.0000e-0051.0100e-0036.0000e-0051.0800e-003 2.8000e-004Hauling 1.3000e-0047.5800e-0032.0800e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.2033 0.00001.2033 1.2033 0.0000 5,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5606.7648 606.7648 0.0175 0.0527 622.91767.9500e-0037.3200e-003295.8445Total 0.1262 0.6756 1.1783 5.8000e-0030.4244 5.4800e-0030.4299 0.1147 5.1800e-0030.11991.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600309.4657 309.4657 9.3800e-0030.0448 323.05311.9000e-0046.1000e-0044.0200Vendor 0.0167 0.6002 0.2163 2.8700e-0030.0948 3.6600e-0030.0985 0.0273 3.5000e-0030.03086.0000e-0053.4000e-0043.8335 3.83353.0000e-0051.0100e-0036.0000e-0051.0800e-003 2.8000e-004Hauling 1.3000e-0047.5800e-0032.0800e-003Categorylb/daylb/day
Page 29 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.9900e-0031.8300e-00373.96114.1000e-0040.022273.3664 73.36647.3000e-0040.0822 4.4000e-0040.0826 0.0218Worker 0.0273 0.0170 0.2400221.0470 221.0470 6.7000e-0030.0320 230.75221.5900e-0035.0100e-00333.0213Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.1000e-0042.7900e-00331.4894 31.48942.8000e-0048.3300e-0035.3000e-0048.8600e-003 2.2800e-003Hauling 1.0800e-0030.0623 0.0171N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5752.9545 752.9545 0.2435 759.04250.2435759.0425Total 0.4735 5.1410 2.4717 7.7800e-0030.2147 0.21470.1975 0.19750.1975 0.1975752.9545 752.95457.7800e-0030.2147 0.2147Off-Road 0.4735 5.1410 2.4717N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.9 Vault for Tunnel Isolation - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5606.7648 606.7648 0.0175 0.0527 622.91767.9500e-0037.3200e-003295.8445Total 0.1262 0.6756 1.1783 5.8000e-0030.4244 5.4800e-0030.4299 0.1147 5.1800e-0030.11991.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600309.4657 309.4657 9.3800e-0030.0448 323.0531Vendor 0.0167 0.6002 0.2163 2.8700e-0030.0948 3.6600e-0030.0985 0.0273 3.5000e-0030.0308
Page 30 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied325.9028 325.9028 0.0103 0.0389 337.73471.9900e-0031.8300e-00373.9611Total 0.0404 0.5079 0.4116 3.0600e-0030.1582 3.5800e-0030.1618 0.0436 3.4200e-0030.04704.1000e-0040.022273.3664 73.36647.3000e-0040.0822 4.4000e-0040.0826 0.0218Worker 0.0273 0.0170 0.2400221.0470 221.0470 6.7000e-0030.0320 230.75221.5900e-0035.0100e-00333.0213Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.1000e-0042.7900e-00331.4894 31.48942.8000e-0048.3300e-0035.3000e-0048.8600e-003 2.2800e-003Hauling 1.0800e-0030.0623 0.0171N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5752.9545 752.9545 0.2435 759.04250.2435759.0425Total 0.4735 5.1410 2.4717 7.7800e-0030.2147 0.21470.1975 0.1975 0.00000.1975 0.1975 0.0000 752.9545 752.95457.7800e-0030.2147 0.2147Off-Road 0.4735 5.1410 2.4717N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5325.9028 325.9028 0.0103 0.0389 337.7347Total 0.0404 0.5079 0.4116 3.0600e-0030.1582 3.5800e-0030.1618 0.0436 3.4200e-0030.0470
Page 31 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction On-Site524.6861 524.6861 0.0152 0.0410 537.26517.9500e-0037.3200e-003295.8445Total 0.1216 0.5167 1.1200 5.0400e-0030.3990 4.5400e-0030.4036 0.1074 4.2800e-0030.11171.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75225.1000e-0041.6200e-00310.6684Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02201.6000e-0049.0000e-00410.1735 10.17359.0000e-0052.6900e-0031.7000e-0042.8600e-003 7.4000e-004Hauling 3.5000e-0040.0201 5.5300e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9674 6,386.9674 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.27921.2792 1.27926,386.9674 6,386.96740.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.10 Temporary Access Trestle Removal - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 32 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2ePM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.11 Construction and Installation of Intake Screen Structure - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5524.6861 524.6861 0.0152 0.0410 537.26517.9500e-0037.3200e-003295.8445Total 0.1216 0.5167 1.1200 5.0400e-0030.3990 4.5400e-0030.4036 0.1074 4.2800e-0030.11171.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75225.1000e-0041.6200e-00310.6684Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02201.6000e-0049.0000e-00410.1735 10.17359.0000e-0052.6900e-0031.7000e-0042.8600e-003 7.4000e-004Hauling 3.5000e-0040.0201 5.5300e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9673 6,386.9673 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.2792 0.00001.2792 1.2792 0.0000 6,386.9673 6,386.96730.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 33 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.65465,259.07861.2033 1.2033 0.0000 5,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5517.4516 517.4516 0.0148 0.0398 529.67877.9500e-0037.3200e-003295.8445Total 0.1214 0.5024 1.1160 4.9800e-0030.3971 4.4200e-0030.4015 0.1069 4.1700e-0030.11101.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.5000e-0044.7000e-0043.0820Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.0000e-0052.6000e-0042.9390 2.93903.0000e-0057.8000e-0045.0000e-0058.3000e-004 2.1000e-004Hauling 1.0000e-0045.8100e-0031.6000e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.20331.2033 1.20335,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964Categorylb/daylb/day
Page 34 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied4,940.6600 4,940.6600 0.98194,965.20760.98194,965.2076Total 2.7740 20.2486 23.6486 0.05250.8832 0.88320.8546 0.85460.8546 0.85464,940.6600 4,940.66000.05250.8832 0.8832Off-Road 2.7740 20.2486 23.6486N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.12 Plant Shutdown - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5517.4516 517.4516 0.0148 0.0398 529.67877.9500e-0037.3200e-003295.8445Total 0.1214 0.5024 1.1160 4.9800e-0030.3971 4.4200e-0030.4015 0.1069 4.1700e-0030.11101.6200e-0030.0888293.4656 293.46562.9000e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1093 0.0679 0.9600221.0470 221.0470 6.7000e-0030.0320 230.75221.5000e-0044.7000e-0043.0820Vendor 0.0119 0.4287 0.1545 2.0500e-0030.0677 2.6100e-0030.0703 0.0195 2.5000e-0030.02205.0000e-0052.6000e-0042.9390 2.93903.0000e-0057.8000e-0045.0000e-0058.3000e-004 2.1000e-004Hauling 1.0000e-0045.8100e-0031.6000e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.2033 0.0000
Page 35 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction Off-Site4,940.6600 4,940.6600 0.98194,965.20760.98194,965.2076Total 2.7740 20.2486 23.6486 0.05250.8832 0.88320.8546 0.8546 0.00000.8546 0.8546 0.0000 4,940.6600 4,940.66000.05250.8832 0.8832Off-Road 2.7740 20.2486 23.6486N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5552.9875 552.9875 0.0168 0.0466 567.28147.2400e-0036.8400e-003286.0418Total 0.1159 0.5905 1.0756 5.2900e-0030.4103 5.1900e-0030.4155 0.1105 4.9000e-0030.11541.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.73532.7500e-0038.2700e-00354.5043Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02208.5000e-0044.6900e-00351.9709 51.97094.7000e-0040.0140 8.9000e-0040.0149 3.8400e-003Hauling 1.7900e-0030.1037 0.0292N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 36 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied1.04123,278.5334Unmitigated Construction Off-Site0.4248 0.42483,252.5038 3,252.50380.0337 0.0000 0.4605 0.4605 0.0000Total 1.2444 11.7628 12.16243,252.5038 3,252.5038 1.04123,278.53340.0000Off-Road 1.2444 11.7628 12.1624 0.03370.4605 0.46050.4248 0.42480.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.13 Demolition of Existing Tunnels - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5552.9875 552.9875 0.0168 0.0466 567.28147.2400e-0036.8400e-003286.0418Total 0.1159 0.5905 1.0756 5.2900e-0030.4103 5.1900e-0030.4155 0.1105 4.9000e-0030.11541.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.73532.7500e-0038.2700e-00354.5043Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02208.5000e-0044.6900e-00351.9709 51.97094.7000e-0040.0140 8.9000e-0040.0149 3.8400e-003Hauling 1.7900e-0030.1037 0.0292N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 37 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO1.04123,278.5334Mitigated Construction Off-Site0.4248 0.4248 0.0000 3,252.5038 3,252.50380.0337 0.0000 0.4605 0.4605 0.0000Total 1.2444 11.7628 12.16243,252.5038 3,252.5038 1.04123,278.53340.0000Off-Road 1.2444 11.7628 12.1624 0.03370.4605 0.46050.4248 0.4248 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5513.0469 513.0469 0.0147 0.0402 525.39387.2400e-0036.8400e-003286.0418Total 0.1146 0.5108 1.0532 4.9300e-0030.3996 4.5100e-0030.4041 0.1076 4.2500e-0030.11181.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.73536.4000e-0041.9100e-00312.6167Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02202.0000e-0041.0900e-00312.0303 12.03031.1000e-0043.2400e-0032.1000e-0043.4500e-003 8.9000e-004Hauling 4.1000e-0040.0240 6.7500e-003CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO
Page 38 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.8200e-0030.0115 75.70041.1900e-0036.5100e-00372.1818 72.18186.5000e-0040.0194 1.2400e-0030.0207 5.3300e-003Hauling 2.4900e-0030.1441 0.0405N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5185.0385 185.0385 0.0599 186.53470.0599186.5347Total 0.1178 1.1044 1.4241 1.9100e-0030.0638 0.06380.0587 0.05870.0587 0.0587185.0385 185.03851.9100e-0030.0638 0.0638Off-Road 0.1178 1.1044 1.4241N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.14 Demobilization - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5513.0469 513.0469 0.0147 0.0402 525.39387.2400e-0036.8400e-003286.0418Total 0.1146 0.5108 1.0532 4.9300e-0030.3996 4.5100e-0030.4041 0.1076 4.2500e-0030.11181.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.73536.4000e-0041.9100e-00312.6167Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02202.0000e-0041.0900e-00312.0303 12.03031.1000e-0043.2400e-0032.1000e-0043.4500e-003 8.9000e-004Hauling 4.1000e-0040.0240 6.7500e-003Categorylb/daylb/day
Page 39 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied7.2400e-0036.8400e-003286.04181.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.73533.8200e-0030.0115 75.7004Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02201.1900e-0036.5100e-00372.1818 72.18186.5000e-0040.0194 1.2400e-0030.0207 5.3300e-003Hauling 2.4900e-0030.1441 0.0405N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5185.0385 185.0385 0.0599 186.53470.0599186.5347Total 0.1178 1.1044 1.4241 1.9100e-0030.0638 0.06380.0587 0.0587 0.00000.0587 0.0587 0.0000 185.0385 185.03851.9100e-0030.0638 0.0638Off-Road 0.1178 1.1044 1.4241N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5573.1984 573.1984 0.0179 0.0498 588.47757.2400e-0036.8400e-003286.0418Total 0.1166 0.6309 1.0869 5.4700e-0030.4158 5.5400e-0030.4213 0.1120 5.2400e-0030.11721.5400e-0030.0887283.8235 283.82352.8100e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1026 0.0610 0.8956217.1931 217.1931 6.8500e-0030.0315 226.7353Vendor 0.0115 0.4258 0.1509 2.0100e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.0220
Page 40 of 40CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:26 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, SummerEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied573.1984 573.1984 0.0179 0.0498 588.4775Total 0.1166 0.6309 1.0869 5.4700e-0030.4158 5.5400e-0030.4213 0.1120 5.2400e-0030.1172
Page 1 of 39Off-road Equipment - No Landside EquipmentOff-road Equipment - info provided by clientOff-road Equipment - Mobilization: applicant provided project-specific detail.Off-road Equipment - Permanent Pile Driving: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - Construction and Installation of Intake Screen Structure: applicant provided project-specific detail.Off-road Equipment - Deck Structure Construction: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - provided by clientOff-road Equipment - Dredge Material Hauling phase included to account for dust and trips from hauling of dredged material during Turbidity Curtain Construction.0.0041.3 User Entered Comments & Non-Default DataProject Characteristics - Land Use - Applicant provided project specific detail.Construction Phase - Applicant provided project specific detail.CO2 Intensity (lb/MWhr)539.98CH4 Intensity (lb/MWhr)0.033N2O Intensity (lb/MWhr)Climate Zone13Operational Year2023Utility CompanySan Diego Gas & Electric01.2 Other Project CharacteristicsUrbanizationUrbanWind Speed (m/s)2.6Precipitation Freq (Days)40User Defined Industrial1.00User Defined Unit2.000.00Carlsbad Desalination Alternative 22San Diego County APCD Air District, Winter1.0 Project Characteristics1.1 Land UsageLand UsesSizeMetricLot Acreage Floor Surface Area PopulationCalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Page 2 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDays200.0018.00tblConstructionPhaseNumDaysWeek5.007.00tblConstructionPhaseNumDays200.0025.00tblConstructionPhaseNumDays20.00108.00tblConstructionPhaseNumDays200.0026.00tblConstructionPhaseNumDays200.0045.00tblConstructionPhaseNumDays200.0069.00tblConstructionPhaseNumDays200.00105.00tblConstructionPhaseNumDays200.0077.00tblConstructionPhaseNumDays200.0072.00tblConstructionPhaseNumDays20.0027.00tblConstructionPhaseNumDays200.0070.00tblConstructionPhaseNumDays2.0014.00tblConstructionPhaseNumDays200.0014.00tblAreaCoatingArea_EF_Residential_Exterior25050tblAreaCoatingArea_EF_Residential_Interior25050tblAreaCoatingArea_EF_Nonresidential_Exterior25050tblAreaCoatingArea_EF_Nonresidential_Interior25050Demolition - Area Coating - NATable NameColumn NameDefault ValueNew ValueOff-road Equipment - Temporary Access Trestle Installation: applicant provided project-specific detail.Off-road Equipment - provided by clientOff-road Equipment - Turbidity Curtain Construction: applicant provided project-specific detail. Included "grader" to account for dredged material movement in CalEEMod.Off-road Equipment - provided by clientTrips and VMT - Dredging Phase - 2,200 CY of dredge. 16CY of material per truck. 137.5 one way trucks. 275 total truck trips
Page 3 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentLoadFactor0.370.45tblOffRoadEquipmentLoadFactor0.560.20tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.500.29tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentLoadFactor0.500.45tblOffRoadEquipmentLoadFactor0.420.25tblOffRoadEquipmentLoadFactor0.200.50tblOffRoadEquipmentLoadFactor0.360.45tblOffRoadEquipmentHorsePower65.0070.00tblOffRoadEquipmentLoadFactor0.380.45tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower9.0020.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower158.00345.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower221.00231.00tblOffRoadEquipmentHorsePower231.00249.00tblOffRoadEquipmentHorsePower221.00469.00tblOffRoadEquipmentHorsePower172.00100.00tblOffRoadEquipmentHorsePower158.0045.00tblOffRoadEquipmentHorsePower203.00168.00tblConstructionPhaseNumDaysWeek5.007.00tblLandUseLotAcreage0.002.00tblConstructionPhaseNumDaysWeek5.007.00
Page 4 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00
Page 5 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount3.002.00tblOffRoadEquipmentOffRoadEquipmentUnitAmount1.000.00
Page 6 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours6.000.00
Page 7 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedtblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0014.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0046.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.002.00tblTripsAndVMTHaulingTripNumber0.0020.00tblTripsAndVMTHaulingTripNumber0.0050.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.0040.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.004.00tblTripsAndVMTHaulingTripNumber0.00165.00tblTripsAndVMTHaulingTripNumber0.00275.00tblTripsAndVMTHaulingTripLength20.0025.40tblTripsAndVMTHaulingTripNumber0.0050.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.0010.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours8.000.00tblOffRoadEquipmentUsageHours6.000.00tblOffRoadEquipmentUsageHours8.000.00
Page 8 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied13,419.037713,419.03772.9957 0.0993 13,519.67201.1113 0.3251 8,211.45572023 6.0581 50.1941 54.8175 0.1397 0.8305 2.2557 3.0589 0.2241 2.1499 2.3661 0.00001.4894 1.7518 0.0000 8,125.1822 8,125.18220.0841 0.9718 1.5246 2.4964 0.26242022 4.2003 34.1510 37.3553N2O CO2eYearlb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH42.0 Emissions Summary2.1 Overall Construction (Maximum Daily Emission)Unmitigated ConstructionROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5tblTripsAndVMTWorkerTripNumber15.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTWorkerTripNumber0.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTWorkerTripNumber8.0040.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00tblTripsAndVMTVendorTripNumber0.0010.00
Page 9 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedNum Days WeekNum DaysPhase Description1 MobilizationSite Preparation9/7/2022 9/20/20227 14Phase NumberPhase NamePhase TypeStart Date End Date3.0 Construction DetailConstruction Phase0.00 0.00 0.00N20 CO2ePercent Reduction0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00PM2.5 TotalBio- CO2 NBio-CO2 Total CO2 CH4Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5ROG NOx CO SO213,419.037713,419.03772.9957 0.3251 13,519.67201.0564 0.0504 5,517.4944Maximum 6.0581 50.1941 54.8175 0.1397 0.9718 2.2557 3.0589 0.2624 2.1499 2.3661 0.00000.8595 0.9700 0.0000 5,478.4518 5,478.45180.0576 0.4158 0.8885 1.2988 0.11202024 2.8984 20.8688 24.686313,419.037713,419.03772.9957 0.0993 13,519.67201.1113 0.3251 8,211.45572023 6.0581 50.1941 54.8175 0.1397 0.8305 2.2557 3.0589 0.2241 2.1499 2.3661 0.00001.4894 1.7518 0.0000 8,125.1822 8,125.18220.0841 0.9718 1.5246 2.4964 0.26242022 4.2003 34.1510 37.3553N2O CO2eYearlb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated ConstructionROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.513,419.037713,419.03772.9957 0.3251 13,519.67201.0564 0.0504 5,517.4944Maximum 6.0581 50.1941 54.8175 0.1397 0.9718 2.2557 3.0589 0.2624 2.1499 2.3661 0.00000.8595 0.9700 0.0000 5,478.4518 5,478.45180.0576 0.4158 0.8885 1.2988 0.11202024 2.8984 20.8688 24.6863
Page 10 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.20Turbidity Curtain ConstructionForklifts110.00890.48Turbidity Curtain ConstructionCranes110.002310.29Turbidity Curtain ConstructionAir Compressors410.00780.37Turbidity Curtain ConstructionAerial Lifts210.00630.31MobilizationTractors/Loaders/Backhoes00.00970.50MobilizationRubber Tired Loaders110.001680.45MobilizationForklifts110.0089Load FactorMobilizationExcavators110.00450.45Phase NameOffroad Equipment TypeAmountUsage Hours Horse PowerAcres of Grading (Site Preparation Phase): 0Acres of Grading (Grading Phase): 0Acres of Paving: 0Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural Coating – OffRoad Equipment5 10813 DemobilizationBuilding Construction7/8/2024 7/31/20245 1812 Demolition of Existing Tunnels Demolition2/7/2024 7/7/20247 4511 Plant ShutdownBuilding Construction1/3/2024 2/6/20245 2510 Construction and Installation of Intake Screen StructureBuilding Construction8/30/2023 10/13/20235 1059 Temporary Access Trestle Removal Building Construction6/27/2023 8/1/20235 268 Vault for Tunnel IsolationBuilding Construction6/26/2023 11/17/20235 727 Deck Structure Construction Building Construction4/19/2023 6/26/20237 696 Install 72 Inch LineBuilding Construction3/15/2023 6/22/20237 705 Permanent Pile DrivingBuilding Construction2/1/2023 4/18/20237 774 Temporary Access Trestle InstallationBuilding Construction11/23/2022 1/31/20237 143 Dredging/ExcavationDemolition11/16/2022 12/22/20225 272 Turbidity Curtain Construction Building Construction11/2/2022 11/15/2022
Page 11 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.37Install 72 Inch LineTractors/Loaders/Backhoes00.00970.20Install 72 Inch LineGenerator Sets00.00840.74Install 72 Inch LineForklifts00.00890.29Install 72 Inch LineExcavators110.003450.45Install 72 Inch LineCranes110.002490.45Install 72 Inch LineBore/Drill Rigs110.002310.29Permanent Pile DrivingWelders210.00460.25Permanent Pile DrivingTractors/Loaders/Backhoes00.00970.37Permanent Pile DrivingOther Construction Equipment310.001000.20Permanent Pile DrivingGenerator Sets210.00840.74Permanent Pile DrivingForklifts110.00890.45Permanent Pile DrivingCranes110.002310.29Permanent Pile DrivingBore/Drill Rigs110.004690.48Permanent Pile DrivingBore/Drill Rigs110.002210.50Permanent Pile DrivingAir Compressors410.00780.45Permanent Pile DrivingAerial Lifts210.00630.31Temporary Access Trestle Installation Welders210.00460.74Temporary Access Trestle Installation Tractors/Loaders/Backhoes00.00970.37Temporary Access Trestle Installation Generator Sets210.00840.29Temporary Access Trestle Installation Forklifts110.00890.20Temporary Access Trestle Installation Cranes110.002310.48Temporary Access Trestle Installation Bore/Drill Rigs110.002210.50Temporary Access Trestle Installation Air Compressors410.00780.37Temporary Access Trestle Installation Aerial Lifts210.00630.31Dredging/ExcavationTractors/Loaders/Backhoes00.00970.73Dredging/ExcavationRubber Tired Dozers00.002470.40Dredging/ExcavationConcrete/Industrial Saws00.00810.37Turbidity Curtain ConstructionWelders210.00460.45Turbidity Curtain ConstructionTractors/Loaders/Backhoes00.0097Turbidity Curtain ConstructionGenerator Sets210.00840.74
Page 12 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.74Construction and Installation of Intake Screen StructureGenerator Sets210.00840.29Construction and Installation of Intake Screen StructureForklifts110.00890.20Construction and Installation of Intake Screen StructureCranes110.002310.31Construction and Installation of Intake Screen StructureAir Compressors410.00780.48Construction and Installation of Intake Screen StructureAerial Lifts210.00630.37Temporary Access Trestle Removal Welders210.00460.45Temporary Access Trestle Removal Tractors/Loaders/Backhoes00.00970.20Temporary Access Trestle Removal Generator Sets210.00840.74Temporary Access Trestle Removal Forklifts110.00890.50Temporary Access Trestle Removal Cranes110.002310.29Temporary Access Trestle Removal Bore/Drill Rigs110.002210.31Temporary Access Trestle Removal Air Compressors410.00780.48Temporary Access Trestle Removal Aerial Lifts210.00630.37Vault for Tunnel IsolationWelders00.00460.45Vault for Tunnel IsolationTractors/Loaders/Backhoes00.00970.20Vault for Tunnel IsolationGenerator Sets00.00840.74Vault for Tunnel IsolationForklifts00.00890.29Vault for Tunnel IsolationExcavators00.003450.45Vault for Tunnel IsolationCranes110.002490.45Vault for Tunnel IsolationAir Compressors00.00780.48Deck Structure ConstructionWelders210.00460.74Deck Structure ConstructionTractors/Loaders/Backhoes00.00970.37Deck Structure ConstructionGenerator Sets210.00840.29Deck Structure ConstructionForklifts110.00890.20Deck Structure ConstructionCranes110.002310.31Deck Structure ConstructionAir Compressors410.00780.48Deck Structure ConstructionAerial Lifts210.0063Install 72 Inch LineWelders00.00460.45
Page 13 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedHHDT10.807.30 25.40 LD_MixHDT_MixTurbidity Curtain Construction1240.00 46.00 165.00Hauling Vehicle ClassMobilization340.00 10.00 50.0010.807.30 20.00 LD_MixHDT_Mix HHDT0.45Trips and VMTPhase Name Offroad Equipment CountWorker Trip NumberVendor Trip NumberHauling Trip NumberWorker Trip LengthVendor Trip LengthHauling Trip LengthWorker Vehicle ClassVendor Vehicle ClassDemobilizationWelders00.00460.74DemobilizationTractors/Loaders/Backhoes00.00970.37DemobilizationGenerator Sets00.00840.29DemobilizationForklifts110.00890.20DemobilizationCranes00.002310.45Demolition of Existing TunnelsTractors/Loaders/Backhoes00.00970.37Demolition of Existing TunnelsSkid Steer Loaders210.00700.20Demolition of Existing TunnelsRubber Tired Dozers00.002470.40Demolition of Existing TunnelsForklifts110.00890.29Demolition of Existing TunnelsExcavators110.003450.45Demolition of Existing TunnelsCranes110.002490.20Demolition of Existing TunnelsConcrete/Industrial Saws00.00810.73Demolition of Existing TunnelsCement and Mortar Mixers110.00200.37Plant ShutdownWelders210.00460.45Plant ShutdownTractors/Loaders/Backhoes00.00970.20Plant ShutdownGenerator Sets00.00840.74Plant ShutdownForklifts110.00890.29Plant ShutdownExcavators110.003450.45Plant ShutdownCranes110.002490.45Plant ShutdownAir Compressors410.00780.48Construction and Installation of Intake Screen StructureWelders210.0046Construction and Installation of Intake Screen StructureTractors/Loaders/Backhoes00.00970.37
Page 14 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.47931,494.05020.4747 0.47471,482.0669 1,482.06690.0153 0.0000 0.5160 0.5160 0.0000Total 1.0599 9.1454 11.01681,482.0669 1,482.0669 0.47931,494.05020.0000Off-Road 1.0599 9.1454 11.0168 0.01530.5160 0.51600.4747 0.47470.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.1 Mitigation Measures Construction3.2 Mobilization - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5HHDTDemobilization140.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixDemolition of Existing Tunnels640.00 10.00 20.00HHDTPlant Shutdown940.00 10.00 20.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixConstruction and Installation of Intake Screen Structure1240.00 10.00 2.00HHDTTemporary Access Trestle Removal1340.00 10.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixVault for Tunnel Isolation110.00 10.00 50.00HHDTDeck Structure Construction1240.00 14.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixInstall 72 Inch Line340.00 10.00 40.00HHDTPermanent Pile Driving1740.00 10.00 4.0010.807.30 20.00 LD_MixHDT_Mix HHDT10.807.30 20.00 LD_MixHDT_MixTemporary Access Trestle Installation1340.00 10.00 4.00Dredging/Excavation040.00 10.00 275.0010.807.30 20.00 LD_MixHDT_Mix HHDT
Page 15 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.47931,494.05020.4747 0.4747 0.0000 1,482.0669 1,482.06690.0153 0.0000 0.5160 0.5160 0.0000Total 1.0599 9.1454 11.01681,482.0669 1,482.0669 0.47931,494.05020.0000Off-Road 1.0599 9.1454 11.0168 0.01530.5160 0.51600.4747 0.4747 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5763.1479 763.1479 0.0281 0.0811 788.02579.3100e-0038.5100e-003289.1464Total 0.1639 1.2392 1.3085 7.2000e-0030.4588 0.0133 0.4720 0.1238 0.0126 0.13641.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820229.9436 229.9436 6.9600e-0030.0334 240.07270.0118 0.0392 258.8066Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.02515.3500e-0030.0225246.8257 246.82572.2400e-0030.0625 5.6000e-0030.0681 0.0171Hauling 0.0156 0.6018 0.1431CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx COUnmitigated Construction Off-Site
Page 16 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedUnmitigated Construction Off-Site5,242.7272 5,242.7272 0.67555,259.61420.67555,259.6142Total 3.5788 28.3174 32.0626 0.05601.4023 1.40231.3758 1.37581.3758 1.37585,242.7272 5,242.72720.05601.4023 1.4023Off-Road 3.5788 28.3174 32.0626N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.3 Turbidity Curtain Construction - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5763.1479 763.1479 0.0281 0.0811 788.02579.3100e-0038.5100e-003289.1464Total 0.1639 1.2392 1.3085 7.2000e-0030.4588 0.0133 0.4720 0.1238 0.0126 0.13641.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820229.9436 229.9436 6.9600e-0030.0334 240.07270.0118 0.0392 258.8066Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.02515.3500e-0030.0225246.8257 246.82572.2400e-0030.0625 5.6000e-0030.0681 0.0171Hauling 0.0156 0.6018 0.1431CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx COMitigated Construction Off-Site
Page 17 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7272 5,242.7272 0.67555,259.61420.67555,259.6142Total 3.5788 28.3174 32.0626 0.05601.4023 1.40231.3758 1.3758 0.00001.3758 1.3758 0.0000 5,242.7272 5,242.72720.05601.4023 1.4023Off-Road 3.5788 28.3174 32.0626N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.52,369.3468 2,369.3468 0.0907 0.3251 2,468.48019.3100e-0038.5100e-003289.1464Total 0.2902 5.0838 2.3795 0.0220 0.9019 0.0519 0.9538 0.2486 0.0496 0.29821.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.98201,057.7406 1,057.7406 0.0320 0.1537 1,104.33450.0494 0.1629 1,074.9992Vendor 0.1016 2.5386 0.8436 9.8200e-0030.3115 0.0267 0.3382 0.0897 0.0255 0.11520.0224 0.09411,025.2277 1,025.22779.3100e-0030.2617 0.0234 0.2851 0.0717Hauling 0.0624 2.4597 0.5540N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 18 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied0.0338 0.1118 738.07820.0153 0.0641703.9105 703.91056.3900e-0030.1781 0.0160 0.1941 0.0488Hauling 0.0445 1.7163 0.4082CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.00000.0000Unmitigated Construction Off-Site0.0000 0.00000.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.00000.00000.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.4 Dredging/Excavation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.52,369.3468 2,369.3468 0.0907 0.3251 2,468.48019.3100e-0038.5100e-003289.1464Total 0.2902 5.0838 2.3795 0.0220 0.9019 0.0519 0.9538 0.2486 0.0496 0.29821.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.98201,057.7406 1,057.7406 0.0320 0.1537 1,104.33450.0494 0.1629 1,074.9992Vendor 0.1016 2.5386 0.8436 9.8200e-0030.3115 0.0267 0.3382 0.0897 0.0255 0.11520.0224 0.09411,025.2277 1,025.22779.3100e-0030.2617 0.0234 0.2851 0.0717Hauling 0.0624 2.4597 0.5540
Page 19 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied229.9436 229.9436 6.9600e-0030.0334 240.07270.0338 0.1118 738.0782Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.02510.0153 0.0641703.9105 703.91056.3900e-0030.1781 0.0160 0.1941 0.0488Hauling 0.0445 1.7163 0.4082CH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO0.00000.0000Mitigated Construction Off-Site0.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.0000 0.0000Total 0.0000 0.0000 0.00000.0000 0.0000 0.0000 0.00000.0000Off-Road 0.0000 0.0000 0.0000 0.00000.0000 0.00000.0000 0.0000 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51,220.2326 1,220.2326 0.0500 0.1537 1,267.29739.3100e-0038.5100e-003289.1464Total 0.1928 2.3536 1.5736 0.0114 0.5745 0.0236 0.5981 0.1555 0.0225 0.17801.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820229.9436 229.9436 6.9600e-0030.0334 240.0727Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.0251
Page 20 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied520.2714 520.2714 0.0165 0.0426 533.36009.3100e-0038.5100e-003289.1464Total 0.1486 0.6470 1.1677 5.0000e-0030.3973 7.7500e-0030.4051 0.1069 7.3500e-0030.11431.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820229.9436 229.9436 6.9600e-0030.0334 240.07271.9000e-0046.3000e-0044.1409Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.02519.0000e-0053.6000e-0043.9492 3.94924.0000e-0051.0000e-0039.0000e-0051.0900e-003 2.7000e-004Hauling 2.5000e-0049.6300e-0032.2900e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,384.6782 6,384.6782 1.04486,410.79841.04486,410.7984Total 3.8589 31.1505 34.6140 0.06781.4932 1.49321.4595 1.45951.4595 1.45956,384.6782 6,384.67820.06781.4932 1.4932Off-Road 3.8589 31.1505 34.6140N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.5 Temporary Access Trestle Installation - 2022Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.51,220.2326 1,220.2326 0.0500 0.1537 1,267.29739.3100e-0038.5100e-003289.1464Total 0.1928 2.3536 1.5736 0.0114 0.5745 0.0236 0.5981 0.1555 0.0225 0.17801.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820
Page 21 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.5 Temporary Access Trestle Installation - 2023520.2714 520.2714 0.0165 0.0426 533.36009.3100e-0038.5100e-003289.1464Total 0.1486 0.6470 1.1677 5.0000e-0030.3973 7.7500e-0030.4051 0.1069 7.3500e-0030.11431.7100e-0030.0889286.3786 286.37862.8300e-0030.3286 1.8600e-0030.3305 0.0872Worker 0.1263 0.0855 0.9820229.9436 229.9436 6.9600e-0030.0334 240.07271.9000e-0046.3000e-0044.1409Vendor 0.0221 0.5519 0.1834 2.1300e-0030.0677 5.8000e-0030.0735 0.0195 5.5500e-0030.02519.0000e-0053.6000e-0043.9492 3.94924.0000e-0051.0000e-0039.0000e-0051.0900e-003 2.7000e-004Hauling 2.5000e-0049.6300e-0032.2900e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,384.6782 6,384.6782 1.04486,410.79841.04486,410.7984Total 3.8589 31.1505 34.6140 0.06781.4932 1.49321.4595 1.4595 0.00001.4595 1.4595 0.0000 6,384.6782 6,384.67820.06781.4932 1.4932Off-Road 3.8589 31.1505 34.6140N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 22 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction On-Site502.4792 502.4792 0.0153 0.0406 514.95958.4700e-0037.9100e-003279.9051Total 0.1303 0.5308 1.0734 4.8200e-0030.3973 4.4400e-0030.4018 0.1069 4.1900e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.9000e-0046.0000e-0043.9664Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02206.0000e-0053.3000e-0043.7824 3.78243.0000e-0051.0000e-0036.0000e-0051.0600e-003 2.7000e-004Hauling 1.2000e-0047.7800e-0032.0800e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9674 6,386.9674 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.27921.2792 1.27926,386.9674 6,386.96740.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 23 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.6 Permanent Pile Driving - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5502.4792 502.4792 0.0153 0.0406 514.95958.4700e-0037.9100e-003279.9051Total 0.1303 0.5308 1.0734 4.8200e-0030.3973 4.4400e-0030.4018 0.1069 4.1900e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.9000e-0046.0000e-0043.9664Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02206.0000e-0053.3000e-0043.7824 3.78243.0000e-0051.0000e-0036.0000e-0051.0600e-003 2.7000e-004Hauling 1.2000e-0047.7800e-0032.0800e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9673 6,386.9673 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.2792 0.00001.2792 1.2792 0.0000 6,386.9673 6,386.96730.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 24 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied9,326.5015 9,326.5015 1.97549,375.88631.97549,375.8863Total 4.7425 39.3219 45.0436 0.09821.8781 1.87811.8023 1.8023 0.00001.8023 1.8023 0.0000 9,326.5015 9,326.50150.09821.8781 1.8781Off-Road 4.7425 39.3219 45.0436N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5502.1353 502.1353 0.0153 0.0405 514.59898.4700e-0037.9100e-003279.9051Total 0.1303 0.5301 1.0732 4.8200e-0030.3972 4.4400e-0030.4017 0.1069 4.1900e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.7000e-0045.5000e-0043.6058Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02206.0000e-0053.0000e-0043.4386 3.43863.0000e-0059.1000e-0046.0000e-0059.7000e-004 2.5000e-004Hauling 1.1000e-0047.0700e-0031.8900e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.59,326.5015 9,326.5015 1.97549,375.88631.97549,375.8863Total 4.7425 39.3219 45.0436 0.09821.8781 1.87811.8023 1.80231.8023 1.80239,326.5015 9,326.50150.09821.8781 1.8781Off-Road 4.7425 39.3219 45.0436
Page 25 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3,054.9308 3,054.9308 0.98803,079.63150.98803,079.6315Total 1.0540 9.7435 7.6092 0.03160.3681 0.36810.3387 0.33870.3387 0.33873,054.9308 3,054.93080.03160.3681 0.3681Off-Road 1.0540 9.7435 7.6092N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.7 Install 72 Inch Line - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5502.1353 502.1353 0.0153 0.0405 514.59898.4700e-0037.9100e-003279.9051Total 0.1303 0.5301 1.0732 4.8200e-0030.3972 4.4400e-0030.4017 0.1069 4.1900e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.7000e-0045.5000e-0043.6058Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02206.0000e-0053.0000e-0043.4386 3.43863.0000e-0059.1000e-0046.0000e-0059.7000e-004 2.5000e-004Hauling 1.1000e-0047.0700e-0031.8900e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 26 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction Off-Site3,054.9308 3,054.9308 0.98803,079.63150.98803,079.6315Total 1.0540 9.7435 7.6092 0.03160.3681 0.36810.3387 0.3387 0.00000.3387 0.3387 0.0000 3,054.9308 3,054.93080.03160.3681 0.3681Off-Road 1.0540 9.7435 7.6092N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5535.4701 535.4701 0.0170 0.0458 549.55548.4700e-0037.9100e-003279.9051Total 0.1313 0.5987 1.0916 5.1200e-0030.4060 5.0000e-0030.4110 0.1093 4.7200e-0030.11401.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.8500e-0035.8500e-00338.5623Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.9000e-0043.2500e-00336.7733 36.77333.3000e-0049.7200e-0036.2000e-0040.0103 2.6600e-003Hauling 1.1800e-0030.0756 0.0202N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 27 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.20331.2033 1.20335,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.8 Deck Structure Construction - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5535.4701 535.4701 0.0170 0.0458 549.55548.4700e-0037.9100e-003279.9051Total 0.1313 0.5987 1.0916 5.1200e-0030.4060 5.0000e-0030.4110 0.1093 4.7200e-0030.11401.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.8500e-0035.8500e-00338.5623Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.9000e-0043.2500e-00336.7733 36.77333.3000e-0049.7200e-0036.2000e-0040.0103 2.6600e-003Hauling 1.1800e-0030.0756 0.0202N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 28 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied309.9057 309.9057 9.3300e-0030.0449 323.52321.9000e-0046.1000e-0044.0239Vendor 0.0163 0.6254 0.2228 2.8700e-0030.0948 3.6700e-0030.0985 0.0273 3.5100e-0030.03086.0000e-0053.4000e-0043.8372 3.83723.0000e-0051.0100e-0036.0000e-0051.0800e-003 2.8000e-004Hauling 1.2000e-0047.8900e-0032.1100e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.2033 0.00001.2033 1.2033 0.0000 5,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5591.0785 591.0785 0.0180 0.0534 607.45228.4700e-0037.9100e-003279.9051Total 0.1349 0.7096 1.1371 5.6400e-0030.4244 5.4900e-0030.4299 0.1147 5.1900e-0030.11991.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122309.9057 309.9057 9.3300e-0030.0449 323.52321.9000e-0046.1000e-0044.0239Vendor 0.0163 0.6254 0.2228 2.8700e-0030.0948 3.6700e-0030.0985 0.0273 3.5100e-0030.03086.0000e-0053.4000e-0043.8372 3.83723.0000e-0051.0100e-0036.0000e-0051.0800e-003 2.8000e-004Hauling 1.2000e-0047.8900e-0032.1100e-003
Page 29 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied322.2151 322.2151 0.0104 0.0391 334.11762.1200e-0031.9800e-00369.9763Total 0.0423 0.5306 0.4045 3.0300e-0030.1582 3.5900e-0030.1618 0.0436 3.4300e-0030.04704.1000e-0040.022269.3339 69.33396.9000e-0040.0822 4.4000e-0040.0826 0.0218Worker 0.0296 0.0191 0.2281221.3612 221.3612 6.6700e-0030.0321 231.08801.5800e-0035.0100e-00333.0534Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.1000e-0042.7900e-00331.5200 31.52002.9000e-0048.3300e-0035.3000e-0048.8600e-003 2.2800e-003Hauling 1.0100e-0030.0648 0.0173N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5752.9545 752.9545 0.2435 759.04250.2435759.0425Total 0.4735 5.1410 2.4717 7.7800e-0030.2147 0.21470.1975 0.19750.1975 0.1975752.9545 752.95457.7800e-0030.2147 0.2147Off-Road 0.4735 5.1410 2.4717N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.9 Vault for Tunnel Isolation - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5591.0785 591.0785 0.0180 0.0534 607.45228.4700e-0037.9100e-003279.9051Total 0.1349 0.7096 1.1371 5.6400e-0030.4244 5.4900e-0030.4299 0.1147 5.1900e-0030.11991.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122
Page 30 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied3.10 Temporary Access Trestle Removal - 2023322.2151 322.2151 0.0104 0.0391 334.11762.1200e-0031.9800e-00369.9763Total 0.0423 0.5306 0.4045 3.0300e-0030.1582 3.5900e-0030.1618 0.0436 3.4300e-0030.04704.1000e-0040.022269.3339 69.33396.9000e-0040.0822 4.4000e-0040.0826 0.0218Worker 0.0296 0.0191 0.2281221.3612 221.3612 6.6700e-0030.0321 231.08801.5800e-0035.0100e-00333.0534Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.1000e-0042.7900e-00331.5200 31.52002.9000e-0048.3300e-0035.3000e-0048.8600e-003 2.2800e-003Hauling 1.0100e-0030.0648 0.0173N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5752.9545 752.9545 0.2435 759.04250.2435759.0425Total 0.4735 5.1410 2.4717 7.7800e-0030.2147 0.21470.1975 0.1975 0.00000.1975 0.1975 0.0000 752.9545 752.95457.7800e-0030.2147 0.2147Off-Road 0.4735 5.1410 2.4717N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 31 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction On-Site508.8802 508.8802 0.0157 0.0416 521.67198.4700e-0037.9100e-003279.9051Total 0.1305 0.5440 1.0769 4.8800e-0030.3990 4.5500e-0030.4036 0.1074 4.2900e-0030.11171.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08805.1000e-0041.6200e-00310.6788Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02201.6000e-0049.0000e-00410.1834 10.18349.0000e-0052.6900e-0031.7000e-0042.8600e-003 7.4000e-004Hauling 3.3000e-0040.0209 5.6000e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9674 6,386.9674 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.27921.2792 1.27926,386.9674 6,386.96740.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 32 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.11 Construction and Installation of Intake Screen Structure - 2023Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5508.8802 508.8802 0.0157 0.0416 521.67198.4700e-0037.9100e-003279.9051Total 0.1305 0.5440 1.0769 4.8800e-0030.3990 4.5500e-0030.4036 0.1074 4.2900e-0030.11171.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08805.1000e-0041.6200e-00310.6788Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02201.6000e-0049.0000e-00410.1834 10.18349.0000e-0052.6900e-0031.7000e-0042.8600e-003 7.4000e-004Hauling 3.3000e-0040.0209 5.6000e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.56,386.9673 6,386.9673 1.02476,412.58451.02476,412.5845Total 3.6015 28.8785 34.4375 0.06781.3095 1.30951.2792 1.2792 0.00001.2792 1.2792 0.0000 6,386.9673 6,386.96730.06781.3095 1.3095Off-Road 3.6015 28.8785 34.4375N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 33 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied5,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.2033 0.00001.2033 1.2033 0.0000 5,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5501.6387 501.6387 0.0153 0.0405 514.07818.4700e-0037.9100e-003279.9051Total 0.1302 0.5291 1.0730 4.8200e-0030.3971 4.4300e-0030.4015 0.1069 4.1800e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.5000e-0044.7000e-0043.0850Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.0000e-0052.6000e-0042.9419 2.94193.0000e-0057.8000e-0045.0000e-0058.3000e-004 2.1000e-004Hauling 9.0000e-0056.0500e-0031.6200e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.55,242.7133 5,242.7133 0.65465,259.07860.65465,259.0786Total 3.3326 26.3290 31.8964 0.05601.2270 1.22701.2033 1.20331.2033 1.20335,242.7133 5,242.71330.05601.2270 1.2270Off-Road 3.3326 26.3290 31.8964
Page 34 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied4,940.6600 4,940.6600 0.98194,965.20760.98194,965.2076Total 2.7740 20.2486 23.6486 0.05250.8832 0.88320.8546 0.85460.8546 0.85464,940.6600 4,940.66000.05250.8832 0.8832Off-Road 2.7740 20.2486 23.6486N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.12 Plant Shutdown - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5501.6387 501.6387 0.0153 0.0405 514.07818.4700e-0037.9100e-003279.9051Total 0.1302 0.5291 1.0730 4.8200e-0030.3971 4.4300e-0030.4015 0.1069 4.1800e-0030.11111.6200e-0030.0888277.3356 277.33562.7400e-0030.3286 1.7600e-0030.3304 0.0872Worker 0.1185 0.0763 0.9122221.3612 221.3612 6.6700e-0030.0321 231.08801.5000e-0044.7000e-0043.0850Vendor 0.0116 0.4467 0.1592 2.0500e-0030.0677 2.6200e-0030.0704 0.0195 2.5100e-0030.02205.0000e-0052.6000e-0042.9419 2.94193.0000e-0057.8000e-0045.0000e-0058.3000e-004 2.1000e-004Hauling 9.0000e-0056.0500e-0031.6200e-003N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 35 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedMitigated Construction Off-Site4,940.6600 4,940.6600 0.98194,965.20760.98194,965.2076Total 2.7740 20.2486 23.6486 0.05250.8832 0.88320.8546 0.8546 0.00000.8546 0.8546 0.0000 4,940.6600 4,940.66000.05250.8832 0.8832Off-Road 2.7740 20.2486 23.6486N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5537.7919 537.7919 0.0173 0.0472 552.28697.7300e-0037.3900e-003270.6550Total 0.1244 0.6203 1.0377 5.1300e-0030.4103 5.2200e-0030.4155 0.1105 4.9200e-0030.11541.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527217.5107 217.5107 6.8200e-0030.0315 227.07382.7400e-0038.2800e-00354.5581Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02208.6000e-0044.6900e-00352.0223 52.02234.7000e-0040.0140 9.0000e-0040.0149 3.8400e-003Hauling 1.6800e-0030.1079 0.0295N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 36 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO1.04123,278.5334Unmitigated Construction Off-Site0.4248 0.42483,252.5038 3,252.50380.0337 0.0000 0.4605 0.4605 0.0000Total 1.2444 11.7628 12.16243,252.5038 3,252.5038 1.04123,278.53340.0000Off-Road 1.2444 11.7628 12.1624 0.03370.4605 0.46050.4248 0.42480.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.13 Demolition of Existing Tunnels - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5537.7919 537.7919 0.0173 0.0472 552.28697.7300e-0037.3900e-003270.6550Total 0.1244 0.6203 1.0377 5.1300e-0030.4103 5.2200e-0030.4155 0.1105 4.9200e-0030.11541.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527217.5107 217.5107 6.8200e-0030.0315 227.07382.7400e-0038.2800e-00354.5581Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02208.6000e-0044.6900e-00352.0223 52.02234.7000e-0040.0140 9.0000e-0040.0149 3.8400e-003Hauling 1.6800e-0030.1079 0.0295N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4ROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5
Page 37 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not AppliedCH4 N2O CO2eCategorylb/daylb/dayExhaust PM2.5PM2.5 Total Bio- CO2 NBio- CO2 Total CO2SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5ROG NOx CO1.04123,278.5334Mitigated Construction Off-Site0.4248 0.4248 0.0000 3,252.5038 3,252.50380.0337 0.0000 0.4605 0.4605 0.0000Total 1.2444 11.7628 12.16243,252.5038 3,252.5038 1.04123,278.53340.0000Off-Road 1.2444 11.7628 12.1624 0.03370.4605 0.46050.4248 0.4248 0.00000.0000 0.00000.00000.0000 0.0000 0.0000 0.0000Fugitive DustN2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5497.8118 497.8118 0.0152 0.0408 510.35807.7300e-0037.3900e-003270.6550Total 0.1231 0.5373 1.0150 4.7700e-0030.3996 4.5300e-0030.4041 0.1076 4.2600e-0030.11181.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527217.5107 217.5107 6.8200e-0030.0315 227.07386.3000e-0041.9200e-00312.6292Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02202.0000e-0041.0900e-00312.0422 12.04221.1000e-0043.2400e-0032.1000e-0043.4500e-003 8.9000e-004Hauling 3.9000e-0040.0250 6.8300e-003Categorylb/daylb/day
Page 38 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied217.5107 217.5107 6.8200e-0030.0315 227.07383.8100e-0030.0115 75.7751Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02201.1900e-0036.5200e-00372.2532 72.25326.5000e-0040.0194 1.2400e-0030.0207 5.3300e-003Hauling 2.3400e-0030.1499 0.0410N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Unmitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5185.0385 185.0385 0.0599 186.53470.0599186.5347Total 0.1178 1.1044 1.4241 1.9100e-0030.0638 0.06380.0587 0.05870.0587 0.0587185.0385 185.03851.9100e-0030.0638 0.0638Off-Road 0.1178 1.1044 1.4241N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH43.14 Demobilization - 2024Unmitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5497.8118 497.8118 0.0152 0.0408 510.35807.7300e-0037.3900e-003270.6550Total 0.1231 0.5373 1.0150 4.7700e-0030.3996 4.5300e-0030.4041 0.1076 4.2600e-0030.11181.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527217.5107 217.5107 6.8200e-0030.0315 227.07386.3000e-0041.9200e-00312.6292Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02202.0000e-0041.0900e-00312.0422 12.04221.1000e-0043.2400e-0032.1000e-0043.4500e-003 8.9000e-004Hauling 3.9000e-0040.0250 6.8300e-003
Page 39 of 39CalEEMod Version: CalEEMod.2020.4.0Date: 5/3/2022 8:36 PMCarlsbad Desalination Alternative 22 - San Diego County APCD Air District, WinterEMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied558.0228 558.0228 0.0184 0.0504 573.50397.7300e-0037.3900e-003270.6550Total 0.1251 0.6623 1.0492 5.3100e-0030.4158 5.5600e-0030.4213 0.1120 5.2500e-0030.11721.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527217.5107 217.5107 6.8200e-0030.0315 227.07383.8100e-0030.0115 75.7751Vendor 0.0112 0.4437 0.1555 2.0100e-0030.0677 2.6400e-0030.0704 0.0195 2.5200e-0030.02201.1900e-0036.5200e-00372.2532 72.25326.5000e-0040.0194 1.2400e-0030.0207 5.3300e-003Hauling 2.3400e-0030.1499 0.0410N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction Off-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5185.0385 185.0385 0.0599 186.53470.0599186.5347Total 0.1178 1.1044 1.4241 1.9100e-0030.0638 0.06380.0587 0.0587 0.00000.0587 0.0587 0.0000 185.0385 185.03851.9100e-0030.0638 0.0638Off-Road 0.1178 1.1044 1.4241N2O CO2eCategorylb/daylb/dayPM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4Mitigated Construction On-SiteROG NOx CO SO2 Fugitive PM10Exhaust PM10PM10 Total Fugitive PM2.5Exhaust PM2.5558.0228 558.0228 0.0184 0.0504 573.50397.7300e-0037.3900e-003270.6550Total 0.1251 0.6623 1.0492 5.3100e-0030.4158 5.5600e-0030.4213 0.1120 5.2500e-0030.11721.5400e-0030.0887268.2589 268.25892.6500e-0030.3286 1.6800e-0030.3303 0.0872Worker 0.1116 0.0686 0.8527
Carlsbad Desalination Alternative 22- Operations
San Diego County, Annual
Project Characteristics -
Land Use - Applicant provided project-specific detail.
Construction Phase - Operations only run.
Off-road Equipment - Operations only run.
Trips and VMT - Operations only run.
On-road Fugitive Dust - Operations only run.
Demolition - Operations only run.
Grading - Operations only run.
Architectural Coating - Operations only run.
Vehicle Trips - Per the applicant, there would be one O&M worker trip per day, 10 miles in length.
Vehicle Emission Factors - CalEEMod default assumptions.
Vehicle Emission Factors - CalEEMod default assumptions.
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
General Light Industry 1.00 1000sqft 0.02 1,000.00 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
13
Wind Speed (m/s)Precipitation Freq (Days)2.6 40
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company San Diego Gas & Electric
2023Operational Year
CO2 Intensity
(lb/MWhr)
539.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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Vehicle Emission Factors - CalEEMod default assumptions.
Road Dust - CalEEMod default assumptions.
Woodstoves - CalEEMod default assumptions.
Consumer Products - CalEEMod default assumptions.
Area Coating - CalEEMod default assumptions.
Landscape Equipment - CalEEMod default assumptions.
Energy Use - Per the applicant, the project would result in 233 MWh/year.
Water And Wastewater - No water use required for the proposed intake system.
Solid Waste - No new operational solid waste generation associated with the new intake system.
Land Use Change - No land use changes with implementation of the proposed project.
Operational Off-Road Equipment - Per the applicant, a crane may be needed sparingly (every 3-4 years). A forklift is needed everday for regular O&M activities.
Fleet Mix - Per the applicant, the daily O&M trip would be a pick up truck (LDT1).
Stationary Sources - Emergency Generators and Fire Pumps - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers - No additional stationary sources required for the proposed project.
Stationary Sources - Emergency Generators and Fire Pumps EF - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers EF - No additional stationary sources required for the proposed project.
Table Name Column Name Default Value New Value
tblConstructionPhase NumDays 1.00 0.00
tblEnergyUse LightingElect 2.83 0.00
tblEnergyUse NT24E 4.27 0.00
tblEnergyUse NT24NG 7.25 0.00
tblEnergyUse T24E 1.08 233.00
tblEnergyUse T24NG 4.27 0.00
tblFleetMix HHD 6.1840e-003 0.00
tblFleetMix LDA 0.55 0.00
tblFleetMix LDT1 0.06 1.00
tblFleetMix LDT2 0.18 0.00
tblFleetMix LHD1 0.02 0.00
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tblFleetMix LHD2 6.2140e-003 0.00
tblFleetMix MCY 0.03 0.00
tblFleetMix MDV 0.12 0.00
tblFleetMix MH 5.1640e-003 0.00
tblFleetMix MHD 8.4930e-003 0.00
tblFleetMix OBUS 7.1500e-004 0.00
tblFleetMix SBUS 9.8200e-004 0.00
tblFleetMix UBUS 5.5600e-004 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 1.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 365.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblSolidWaste SolidWasteGenerationRate 1.24 0.00
tblVehicleTrips CC_TL 7.30 10.00
tblVehicleTrips CC_TTP 28.00 100.00
tblVehicleTrips CNW_TL 7.30 0.00
tblVehicleTrips CNW_TTP 13.00 0.00
tblVehicleTrips CW_TL 9.50 0.00
tblVehicleTrips CW_TTP 59.00 0.00
tblVehicleTrips DV_TP 5.00 0.00
tblVehicleTrips PB_TP 3.00 0.00
tblVehicleTrips PR_TP 92.00 100.00
tblVehicleTrips ST_TR 1.99 2.00
tblVehicleTrips SU_TR 5.00 2.00
tblVehicleTrips WD_TR 4.96 2.00
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2.0 Emissions Summary
2.1 Overall Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction
tblWater IndoorWaterUseRate 231,250.00 0.00
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ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter)
Highest
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 57.0689 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Mobile 9.2000e-
004
1.0200e-
003
0.0108 2.0000e-
005
2.7000e-
003
2.0000e-
005
2.7200e-
003
7.2000e-
004
2.0000e-
005
7.3000e-
004
0.0000 2.2879 2.2879 9.0000e-
005
8.0000e-
005
2.3135
Offroad 0.0236 0.2213 0.2623 3.5000e-
004
0.0136 0.0136 0.0125 0.0125 0.0000 30.9520 30.9520 0.0100 0.0000 31.2023
Waste 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Water 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0296 0.2223 0.2731 3.7000e-
004
2.7000e-
003
0.0137 0.0164 7.2000e-
004
0.0126 0.0133 0.0000 90.3088 90.3088 0.0136 5.0000e-
004
90.7979
Unmitigated Operational
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2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 57.0689 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Mobile 9.2000e-
004
1.0200e-
003
0.0108 2.0000e-
005
2.7000e-
003
2.0000e-
005
2.7200e-
003
7.2000e-
004
2.0000e-
005
7.3000e-
004
0.0000 2.2879 2.2879 9.0000e-
005
8.0000e-
005
2.3135
Offroad 0.0236 0.2213 0.2623 3.5000e-
004
0.0136 0.0136 0.0125 0.0125 0.0000 30.9520 30.9520 0.0100 0.0000 31.2023
Waste 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Water 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0296 0.2223 0.2731 3.7000e-
004
2.7000e-
003
0.0137 0.0164 7.2000e-
004
0.0126 0.0133 0.0000 90.3088 90.3088 0.0136 5.0000e-
004
90.7979
Mitigated Operational
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 3/11/2022 3/10/2022 5 0
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
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3.1 Mitigation Measures Construction
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Site Preparation Graders 0 8.00 187 0.41
Site Preparation Tractors/Loaders/Backhoes 0 8.00 97 0.37
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 0 0.00 0.00 0.00 10.80 7.30 20.00 LD_Mix HDT_Mix HHDT
Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural
Coating – sqft)
Acres of Grading (Site Preparation Phase): 0
Acres of Grading (Grading Phase): 0
Acres of Paving: 0
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction Off-Site
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction Off-Site
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4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 9.2000e-
004
1.0200e-
003
0.0108 2.0000e-
005
2.7000e-
003
2.0000e-
005
2.7200e-
003
7.2000e-
004
2.0000e-
005
7.3000e-
004
0.0000 2.2879 2.2879 9.0000e-
005
8.0000e-
005
2.3135
Unmitigated 9.2000e-
004
1.0200e-
003
0.0108 2.0000e-
005
2.7000e-
003
2.0000e-
005
2.7200e-
003
7.2000e-
004
2.0000e-
005
7.3000e-
004
0.0000 2.2879 2.2879 9.0000e-
005
8.0000e-
005
2.3135
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
General Light Industry 2.00 2.00 2.00 7,280 7,280
Total 2.00 2.00 2.00 7,280 7,280
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
General Light Industry 0.00 10.00 0.00 0.00 100.00 0.00 100 0 0
4.4 Fleet Mix
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
General Light Industry 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
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5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Electricity
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 57.0689 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Electricity
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 57.0689 57.0689 3.4900e-
003
4.2000e-
004
57.2821
NaturalGas
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
NaturalGas
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
5.1 Mitigation Measures Energy
Historical Energy Use: N
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5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated
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6.1 Mitigation Measures Area
6.0 Area Detail
5.3 Energy by Land Use - Electricity
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
General Light
Industry
233000 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Total 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Unmitigated
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
General Light
Industry
233000 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Total 57.0689 3.4900e-
003
4.2000e-
004
57.2821
Mitigated
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ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Unmitigated 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
1.1600e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
3.9100e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 0.0000 0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Total 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Unmitigated
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7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
1.1600e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
3.9100e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 0.0000 0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Total 5.0700e-
003
0.0000 1.0000e-
005
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 2.0000e-
005
2.0000e-
005
0.0000 0.0000 2.0000e-
005
Mitigated
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Total CO2 CH4 N2O CO2e
Category MT/yr
Mitigated 0.0000 0.0000 0.0000 0.0000
Unmitigated 0.0000 0.0000 0.0000 0.0000
7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
General Light
Industry
0 / 0 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000
Unmitigated
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7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
General Light
Industry
0 / 0 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000
Mitigated
8.1 Mitigation Measures Waste
8.0 Waste Detail
Total CO2 CH4 N2O CO2e
MT/yr
Mitigated 0.0000 0.0000 0.0000 0.0000
Unmitigated 0.0000 0.0000 0.0000 0.0000
Category/Year
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8.2 Waste by Land Use
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000
Unmitigated
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000
Mitigated
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
Cranes 1 10.00 1 231 0.29 Diesel
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11.0 Vegetation
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Equipment Type tons/yr MT/yr
Cranes 2.2000e-
004
2.3800e-
003
1.1500e-
003
0.0000 1.0000e-
004
1.0000e-
004
9.0000e-
005
9.0000e-
005
0.0000 0.3168 0.3168 1.0000e-
004
0.0000 0.3194
Forklifts 0.0234 0.2189 0.2612 3.5000e-
004
0.0135 0.0135 0.0125 0.0125 0.0000 30.6352 30.6352 9.9100e-
003
0.0000 30.8829
Total 0.0236 0.2213 0.2623 3.5000e-
004
0.0136 0.0136 0.0125 0.0125 0.0000 30.9520 30.9520 0.0100 0.0000 31.2023
UnMitigated/Mitigated
Forklifts 1 10.00 365 89 0.20 Diesel
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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Carlsbad Desalination Alternative 22- Operations
San Diego County, Winter
Project Characteristics -
Land Use - Applicant provided project-specific detail.
Construction Phase - Operations only run.
Off-road Equipment - Operations only run.
Trips and VMT - Operations only run.
On-road Fugitive Dust - Operations only run.
Demolition - Operations only run.
Grading - Operations only run.
Architectural Coating - Operations only run.
Vehicle Trips - Per the applicant, there would be one O&M worker trip per day, 10 miles in length.
Vehicle Emission Factors - CalEEMod default assumptions.
Vehicle Emission Factors - CalEEMod default assumptions.
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
General Light Industry 1.00 1000sqft 0.02 1,000.00 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
13
Wind Speed (m/s)Precipitation Freq (Days)2.6 40
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company San Diego Gas & Electric
2023Operational Year
CO2 Intensity
(lb/MWhr)
539.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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Vehicle Emission Factors - CalEEMod default assumptions.
Road Dust - CalEEMod default assumptions.
Woodstoves - CalEEMod default assumptions.
Consumer Products - CalEEMod default assumptions.
Area Coating - CalEEMod default assumptions.
Landscape Equipment - CalEEMod default assumptions.
Energy Use - Per the applicant, the project would result in 233 MWh/year.
Water And Wastewater - No water use required for the proposed intake system.
Solid Waste - No new operational solid waste generation associated with the new intake system.
Land Use Change - No land use changes with implementation of the proposed project.
Operational Off-Road Equipment - Per the applicant, a crane may be needed sparingly (every 3-4 years). A forklift is needed everday for regular O&M activities.
Fleet Mix - Per the applicant, the daily O&M trip would be a pick up truck (LDT1).
Stationary Sources - Emergency Generators and Fire Pumps - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers - No additional stationary sources required for the proposed project.
Stationary Sources - Emergency Generators and Fire Pumps EF - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers EF - No additional stationary sources required for the proposed project.
Table Name Column Name Default Value New Value
tblConstructionPhase NumDays 1.00 0.00
tblEnergyUse LightingElect 2.83 0.00
tblEnergyUse NT24E 4.27 0.00
tblEnergyUse NT24NG 7.25 0.00
tblEnergyUse T24E 1.08 233.00
tblEnergyUse T24NG 4.27 0.00
tblFleetMix HHD 6.1840e-003 0.00
tblFleetMix LDA 0.55 0.00
tblFleetMix LDT1 0.06 1.00
tblFleetMix LDT2 0.18 0.00
tblFleetMix LHD1 0.02 0.00
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tblFleetMix LHD2 6.2140e-003 0.00
tblFleetMix MCY 0.03 0.00
tblFleetMix MDV 0.12 0.00
tblFleetMix MH 5.1640e-003 0.00
tblFleetMix MHD 8.4930e-003 0.00
tblFleetMix OBUS 7.1500e-004 0.00
tblFleetMix SBUS 9.8200e-004 0.00
tblFleetMix UBUS 5.5600e-004 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 1.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 365.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblSolidWaste SolidWasteGenerationRate 1.24 0.00
tblVehicleTrips CC_TL 7.30 10.00
tblVehicleTrips CC_TTP 28.00 100.00
tblVehicleTrips CNW_TL 7.30 0.00
tblVehicleTrips CNW_TTP 13.00 0.00
tblVehicleTrips CW_TL 9.50 0.00
tblVehicleTrips CW_TTP 59.00 0.00
tblVehicleTrips DV_TP 5.00 0.00
tblVehicleTrips PB_TP 3.00 0.00
tblVehicleTrips PR_TP 92.00 100.00
tblVehicleTrips ST_TR 1.99 2.00
tblVehicleTrips SU_TR 5.00 2.00
tblVehicleTrips WD_TR 4.96 2.00
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2.0 Emissions Summary
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction
tblWater IndoorWaterUseRate 231,250.00 0.00
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ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mobile 5.1900e-
003
5.7200e-
003
0.0594 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
13.7571 13.7571 5.9000e-
004
4.8000e-
004
13.9147
Offroad 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7066
Total 0.6004 5.9747 3.7835 9.2600e-
003
0.0152 0.2734 0.2886 4.0300e-
003
0.2515 0.2556 0.0000 897.3199 897.3199 0.2864 4.8000e-
004
904.6216
Unmitigated Operational
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2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mobile 5.1900e-
003
5.7200e-
003
0.0594 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
13.7571 13.7571 5.9000e-
004
4.8000e-
004
13.9147
Offroad 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7066
Total 0.6004 5.9747 3.7835 9.2600e-
003
0.0152 0.2734 0.2886 4.0300e-
003
0.2515 0.2556 0.0000 897.3199 897.3199 0.2864 4.8000e-
004
904.6216
Mitigated Operational
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 3/11/2022 3/10/2022 5 0
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Acres of Grading (Site Preparation Phase): 0
Acres of Grading (Grading Phase): 0
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction On-Site
3.1 Mitigation Measures Construction
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Site Preparation Graders 0 8.00 187 0.41
Site Preparation Tractors/Loaders/Backhoes 0 8.00 97 0.37
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 0 0.00 0.00 0.00 10.80 7.30 20.00 LD_Mix HDT_Mix HHDT
Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural
Coating – sqft)
Acres of Paving: 0
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction On-Site
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction Off-Site
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4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 5.1900e-
003
5.7200e-
003
0.0594 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
13.7571 13.7571 5.9000e-
004
4.8000e-
004
13.9147
Unmitigated 5.1900e-
003
5.7200e-
003
0.0594 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
13.7571 13.7571 5.9000e-
004
4.8000e-
004
13.9147
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
General Light Industry 2.00 2.00 2.00 7,280 7,280
Total 2.00 2.00 2.00 7,280 7,280
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
General Light Industry 0.00 10.00 0.00 0.00 100.00 0.00 100 0 0
4.4 Fleet Mix
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
General Light Industry 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
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5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
NaturalGas
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated
5.1 Mitigation Measures Energy
Historical Energy Use: N
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6.1 Mitigation Measures Area
6.0 Area Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Unmitigated 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated
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6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
6.3500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.0214 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 1.0000e-
005
0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Total 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Unmitigated
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7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
6.3500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.0214 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 1.0000e-
005
0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Total 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Mitigated
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
Cranes 1 10.00 1 231 0.29 Diesel
Forklifts 1 10.00 365 89 0.20 Diesel
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11.0 Vegetation
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Equipment Type lb/day lb/day
Cranes 0.4393 4.7694 2.2930 7.2100e-
003
0.1992 0.1992 0.1832 0.1832 0.0000 698.5241 698.5241 0.2259 704.1720
Forklifts 0.1282 1.1996 1.4310 1.9100e-
003
0.0741 0.0741 0.0682 0.0682 0.0000 185.0385 185.0385 0.0599 186.5347
Total 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7067
UnMitigated/Mitigated
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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Carlsbad Desalination Alternative 22- Operations
San Diego County, Summer
Project Characteristics -
Land Use - Applicant provided project-specific detail.
Construction Phase - Operations only run.
Off-road Equipment - Operations only run.
Trips and VMT - Operations only run.
On-road Fugitive Dust - Operations only run.
Demolition - Operations only run.
Grading - Operations only run.
Architectural Coating - Operations only run.
Vehicle Trips - Per the applicant, there would be one O&M worker trip per day, 10 miles in length.
Vehicle Emission Factors - CalEEMod default assumptions.
Vehicle Emission Factors - CalEEMod default assumptions.
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
General Light Industry 1.00 1000sqft 0.02 1,000.00 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
13
Wind Speed (m/s)Precipitation Freq (Days)2.6 40
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company San Diego Gas & Electric
2023Operational Year
CO2 Intensity
(lb/MWhr)
539.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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Vehicle Emission Factors - CalEEMod default assumptions.
Road Dust - CalEEMod default assumptions.
Woodstoves - CalEEMod default assumptions.
Consumer Products - CalEEMod default assumptions.
Area Coating - CalEEMod default assumptions.
Landscape Equipment - CalEEMod default assumptions.
Energy Use - Per the applicant, the project would result in 233 MWh/year.
Water And Wastewater - No water use required for the proposed intake system.
Solid Waste - No new operational solid waste generation associated with the new intake system.
Land Use Change - No land use changes with implementation of the proposed project.
Operational Off-Road Equipment - Per the applicant, a crane may be needed sparingly (every 3-4 years). A forklift is needed everday for regular O&M activities.
Fleet Mix - Per the applicant, the daily O&M trip would be a pick up truck (LDT1).
Stationary Sources - Emergency Generators and Fire Pumps - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers - No additional stationary sources required for the proposed project.
Stationary Sources - Emergency Generators and Fire Pumps EF - No additional stationary sources required for the proposed project.
Stationary Sources - Process Boilers EF - No additional stationary sources required for the proposed project.
Table Name Column Name Default Value New Value
tblConstructionPhase NumDays 1.00 0.00
tblEnergyUse LightingElect 2.83 0.00
tblEnergyUse NT24E 4.27 0.00
tblEnergyUse NT24NG 7.25 0.00
tblEnergyUse T24E 1.08 233.00
tblEnergyUse T24NG 4.27 0.00
tblFleetMix HHD 6.1840e-003 0.00
tblFleetMix LDA 0.55 0.00
tblFleetMix LDT1 0.06 1.00
tblFleetMix LDT2 0.18 0.00
tblFleetMix LHD1 0.02 0.00
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tblFleetMix LHD2 6.2140e-003 0.00
tblFleetMix MCY 0.03 0.00
tblFleetMix MDV 0.12 0.00
tblFleetMix MH 5.1640e-003 0.00
tblFleetMix MHD 8.4930e-003 0.00
tblFleetMix OBUS 7.1500e-004 0.00
tblFleetMix SBUS 9.8200e-004 0.00
tblFleetMix UBUS 5.5600e-004 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 1.00
tblOperationalOffRoadEquipment OperDaysPerYear 260.00 365.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperHoursPerDay 8.00 10.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblOperationalOffRoadEquipment OperOffRoadEquipmentNumber 0.00 1.00
tblSolidWaste SolidWasteGenerationRate 1.24 0.00
tblVehicleTrips CC_TL 7.30 10.00
tblVehicleTrips CC_TTP 28.00 100.00
tblVehicleTrips CNW_TL 7.30 0.00
tblVehicleTrips CNW_TTP 13.00 0.00
tblVehicleTrips CW_TL 9.50 0.00
tblVehicleTrips CW_TTP 59.00 0.00
tblVehicleTrips DV_TP 5.00 0.00
tblVehicleTrips PB_TP 3.00 0.00
tblVehicleTrips PR_TP 92.00 100.00
tblVehicleTrips ST_TR 1.99 2.00
tblVehicleTrips SU_TR 5.00 2.00
tblVehicleTrips WD_TR 4.96 2.00
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2.0 Emissions Summary
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Maximum 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction
tblWater IndoorWaterUseRate 231,250.00 0.00
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ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mobile 5.5000e-
003
5.0800e-
003
0.0632 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
14.5219 14.5219 5.6000e-
004
4.4000e-
004
14.6674
Offroad 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7066
Total 0.6007 5.9741 3.7873 9.2600e-
003
0.0152 0.2734 0.2886 4.0300e-
003
0.2515 0.2556 0.0000 898.0847 898.0847 0.2863 4.4000e-
004
905.3743
Unmitigated Operational
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2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Energy 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mobile 5.5000e-
003
5.0800e-
003
0.0632 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
14.5219 14.5219 5.6000e-
004
4.4000e-
004
14.6674
Offroad 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7066
Total 0.6007 5.9741 3.7873 9.2600e-
003
0.0152 0.2734 0.2886 4.0300e-
003
0.2515 0.2556 0.0000 898.0847 898.0847 0.2863 4.4000e-
004
905.3743
Mitigated Operational
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 3/11/2022 3/10/2022 5 0
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Acres of Grading (Site Preparation Phase): 0
Acres of Grading (Grading Phase): 0
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3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction On-Site
3.1 Mitigation Measures Construction
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Site Preparation Graders 0 8.00 187 0.41
Site Preparation Tractors/Loaders/Backhoes 0 8.00 97 0.37
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 0 0.00 0.00 0.00 10.80 7.30 20.00 LD_Mix HDT_Mix HHDT
Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural
Coating – sqft)
Acres of Paving: 0
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 7 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 8 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 9 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 5.5000e-
003
5.0800e-
003
0.0632 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
14.5219 14.5219 5.6000e-
004
4.4000e-
004
14.6674
Unmitigated 5.5000e-
003
5.0800e-
003
0.0632 1.4000e-
004
0.0152 1.0000e-
004
0.0153 4.0300e-
003
9.0000e-
005
4.1200e-
003
14.5219 14.5219 5.6000e-
004
4.4000e-
004
14.6674
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
General Light Industry 2.00 2.00 2.00 7,280 7,280
Total 2.00 2.00 2.00 7,280 7,280
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
General Light Industry 0.00 10.00 0.00 0.00 100.00 0.00 100 0 0
4.4 Fleet Mix
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
General Light Industry 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
NaturalGas
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Unmitigated
5.1 Mitigation Measures Energy
Historical Energy Use: N
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.1 Mitigation Measures Area
6.0 Area Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Unmitigated 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
General Light
Industry
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 12 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
6.3500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.0214 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 1.0000e-
005
0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Total 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 13 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
6.3500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.0214 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Landscaping 1.0000e-
005
0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Total 0.0278 0.0000 1.0000e-
004
0.0000 0.0000 0.0000 0.0000 0.0000 2.2000e-
004
2.2000e-
004
0.0000 2.3000e-
004
Mitigated
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
Cranes 1 10.00 1 231 0.29 Diesel
Forklifts 1 10.00 365 89 0.20 Diesel
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 14 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Equipment Type lb/day lb/day
Cranes 0.4393 4.7694 2.2930 7.2100e-
003
0.1992 0.1992 0.1832 0.1832 0.0000 698.5241 698.5241 0.2259 704.1720
Forklifts 0.1282 1.1996 1.4310 1.9100e-
003
0.0741 0.0741 0.0682 0.0682 0.0000 185.0385 185.0385 0.0599 186.5347
Total 0.5674 5.9690 3.7240 9.1200e-
003
0.2733 0.2733 0.2514 0.2514 0.0000 883.5626 883.5626 0.2858 890.7067
UnMitigated/Mitigated
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
CalEEMod Version: CalEEMod.2020.4.0 Date: 3/11/2022 2:55 PMPage 15 of 15
Carlsbad Desalination Alternative 22- Operations - San Diego County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
SMAQMD Harborcraft, Dredge and Barge Emission Factor Calculator - Input Data Page
INSTRUCTIONS:
3. Results may be reviewed in "MainEngineEmissRates" and "AuxEngineEmissRates" tabs, both colored yellow.
Inputs and Status A4. Project Information
Date (mm/dd/yyyy):
Project Name:
Project Location:
Contact Person:
Company Name:
Mailing Address:
Phone Number:
A1. Inventory Calendar year Email Address:
Inventory Calendar Year 2022
A2. Main Engine Inputs A3. Auxiliary Engine Inputs
Vessel Name Vessel Type No. of Engines Engine Model Year
Engine Rated Power
(hp)Vessel Number Home Port Vessel Name Auxiliary Engine Type No. of Engines Engine Model Year
Engine Rated Power
(hp)
Workboat Work Boats 1 50 Workboat Work Boats Generator 1 190
Push Knee Tugboat Tow Boats / Push Boats 2 350 Push Knee Tugboat Tow Boats / Push Boats Generator 1 79
Dredge-Crawler Crane Dredge 1 308 Dredge-Crawler Crane Dredger 1 425
Ocean-Going Tugboat Tug Boats 2 2500 Ocean-Going Tugboat Tug Boats Generator 2 86
Survey Vessel Work Boats 1 150 Survey Vessel Work Boats Generator 1 29
Inputs
9/1/2022
Carlsbad Desalination Alternative 22
Carlsbad, CA
XX
1. Enter inputs into tables A1, A2, A3, and A4 below. Required inputs must be entered to estimate emission rates, optional inputs
should be entered if available.
2. After entering inputs, review status and error messages (cell E14); make changes as necessary until this cell is green indicating
that inputs are ready.
Required Inputs Optional Inputs
Required Input
Optional InputInputs color legend
OK. Default values will be applied to blank model year
and HPStatus and error messages
XX
XX
Dudek
Sarah Halterman
Optional InputsRequired Inputs
SMAQMD Harborcraft, Dredge and Barge Emission Factor Calculator - Emission Factor Calculations
Main Engine Emission Factor Calculator
Calendar Year:2022 Number of Entries:5
Vessel Name Vessel Type Engine Type Engine Category Engine Model Year MdlYr Group Engine HP HP Category FCF HP Category Engine Load Factor BSFC (g/hp-hr) No. of engines Annual Hours Age Useful Life PM10 PM2.5 NOx ROG CO PM10 PM2.5 NOx ROG CO
Workboat Work Boats Main A1 2005 2005 50 1 1 0.45 184.16 1 1,250 17 17 0.300 0.276 5.320 1.800 3.730 0.31 0.29 0.06 0.51 0.41
Push Knee Tugboat Tow Boats / Push Boats Main A1 1996 1996 350 5 4 0.68 184.16 2 1,250 26 26 0.361 0.332 9.641 0.680 1.971 0.67 0.62 0.21 0.44 0.25
Dredge-Crawler Crane Dredge Main C1 2005 2005 308 7 4 0.45 185.97 1 1,776 17 17 0.110 0.101 4.000 0.121 0.920 0.67 0.62 0.21 0.44 0.25
Ocean-Going Tugboat Tug Boats Main A1 2001 2001 2,500 8 4 0.50 184.16 2 1,250 21 21 0.361 0.332 7.310 0.680 1.971 0.67 0.62 0.21 0.44 0.25
Survey Vessel Work Boats Main A1 2005 2005 150 3 3 0.45 184.16 1 1,250 17 17 0.220 0.202 5.102 0.680 3.730 0.44 0.40 0.14 0.28 0.16
Vessel/Engine Information Zero-Hour Emission Factors (g/hp-hr)Deterioration Factors (g/hp - hr)Activity
SMAQMD Harborcraft, Dredge and Barge Emission Factor Calculator - Emission Factor Calculations
Main Engine Emission Factor Calculator
Calendar Year:2022 Number of Entries:5
Vessel Name Vessel Type Engine Type Engine Category Engine Model Year MdlYr Group Engine HP HP Category FCF HP Category Engine Load Factor BSFC (g/hp-hr) No. of engines
Workboat Work Boats Main A1 2005 2005 50 1 1 0.45 184.16 1
Push Knee Tugboat Tow Boats / Push Boats Main A1 1996 1996 350 5 4 0.68 184.16 2
Dredge-Crawler Crane Dredge Main C1 2005 2005 308 7 4 0.45 185.97 1
Ocean-Going Tugboat Tug Boats Main A1 2001 2001 2,500 8 4 0.50 184.16 2
Survey Vessel Work Boats Main A1 2005 2005 150 3 3 0.45 184.16 1
Vessel/Engine Information
PM10 PM2.5 NOx ROG CO SO2 CO2 CH4 N2O PM10 PM2.5 NOx ROG CO SO2 CO2 CH4 N2O NOx PM ROG MY Bin
0.314 0.284 5.346 1.957 5.259 0.006 591.045 0.024 0.005 7.1 6.4 120.3 44.0 118.3 0.1 13,298.5 0.5 0.1 0.95 0.80 0.72 1999
0.482 0.429 11.059 0.705 2.464 0.006 591.045 0.024 0.005 229.6 204.4 5,263.9 335.6 1,172.7 2.6 281,337.2 11.4 2.3 0.95 0.80 0.72 1996
0.147 0.131 4.588 0.125 1.150 0.006 596.868 0.024 0.005 20.4 18.1 635.9 17.4 159.4 0.8 82,725.9 3.4 0.7 0.95 0.80 0.72 1996
0.482 0.429 8.385 0.705 2.464 0.006 591.045 0.024 0.005 1,205.7 1,073.7 20,962.9 1,762.6 6,159.4 13.8 1,477,611.4 59.9 12.0 0.95 0.80 0.72 1996
0.253 0.227 5.513 0.627 4.327 0.006 591.045 0.024 0.005 17.1 15.4 372.1 42.3 292.1 0.4 39,895.5 1.6 0.3 0.9 0.8 0.7 1997
Fuel Correction FactorEmission Rates (g/hr)Emission Rates (g/bhp-hr)
SMAQMD Harborcraft, Dredge and Barge Emission Factor Calculator - Main Engine Emission Rates
Calendar Year:2022 Number of Entries:5
Vessel
Name
Vessel
Number
Home
Port
Vessel Type Engine
Model Year
Engine
Rated
Engine Load
Factor
Number of
engines PM10 PM2. 5 NOx ROG CO SO2 CO2 CH4 N2O CO2e PM10 PM2. 5 NOx ROG CO SO2 CO2 CH4 N2O CO2e
Workboat Work Boats 2005 50 0.45 1 0.016 0.014 0.265 0.097 0.261 0.000 29.318 0.001 0.000 29.419 0.314 0.284 5.346 1.957 5.259 0.006 591.045 0.024 0.005 593.1
Push Knee Tugboat Tow Boats / Push Boats 1996 350 0.68 2 0.506 0.451 11.605 0.740 2.585 0.006 620.243 0.025 0.005 622.371 0.482 0.429 11.059 0.705 2.464 0.006 591.045 0.024 0.005 593.1
Dredge-Crawler Crane Dredge 2005 308 0.45 1 0.045 0.040 1.402 0.038 0.351 0.002 182.379 0.007 0.001 183.005 0.147 0.131 4.588 0.125 1.150 0.006 596.868 0.024 0.005 598.9
Ocean-Going Tugboat Tug Boats 2001 2500 0.50 2 2.658 2.367 46.215 3.886 13.579 0.030 3257.578 0.132 0.026 3268.757 0.482 0.429 8.385 0.705 2.464 0.006 591.045 0.024 0.005 593.1
Survey Vessel Work Boats 2005 150 0.45 1 0.038 0.034 0.820 0.093 0.644 0.001 87.955 0.004 0.001 88.256 0.253 0.227 5.513 0.627 4.327 0.006 591.045 0.024 0.005 593.1
Vessel/Engine Information Emission Rates for a Single Engine (g/bhp-hr)Emission Rates (lb/hr; estimates for each row are totals over the number of engines listed in column J for that row)
SMAQMD Harborcraft, Dredge and Barge Emission Factor Calculator - Auxiliary Engine Emission Rates
Calendar Year:2022 Number of Entries:5
Vessel
Name
Vessel
Number
Home
Port
Vessel Type Auxiliary Engine Type Engine
Model Year
Engine
Rated
Engine Load
Factor
Number of
Engines PM10 PM2. 5 NOx ROG CO SO2 CO2 CH4 N2O CO2e PM10 PM2. 5 NOx ROG CO SO2 CO2 CH4 N2O CO2e
Workboat Work Boats Work Boats Generator 1999 190 0.43 1 0.066 0.059 1.590 0.134 0.581 0.001 106.458 0.004 0.001 106.823 0.37 0.33 8.83 0.75 3.23 0.006 591.04 0.02 0.00 593.1
Push Knee Tugboat Tow Boats / Push Boats Tow Boats / Push Boats G enerator 1997 79 0.43 1 0.045 0.040 0.695 0.081 0.312 0.000 44.264 0.002 0.000 44.416 0.60 0.54 9.28 1.09 4.17 0.006 591.04 0.02 0.00 593.1
Dredge-Crawler Crane Dredge Dredger 2006 425 0.51 1 0.070 0.063 2.193 0.060 0.550 0.003 285.215 0.012 0.002 286.193 0.15 0.13 4.59 0.13 1.15 0.006 596.87 0.02 0.00 598.9
Ocean-Going Tugboat Tug Boats Tug Boats Generator 1999 86 0.31 2 0.078 0.070 1.112 0.128 0.490 0.001 69.478 0.003 0.001 69.716 0.67 0.60 9.46 1.09 4.17 0.006 591.04 0.02 0.00 593.1
Survey Vessel Work Boats Work Boats Generator 1999 29 0.43 1 0.018 0.017 0.191 0.064 0.200 0.000 16.249 0.001 0.000 16.305 0.67 0.60 6.93 2.33 7.26 0.006 591.04 0.02 0.00 593.1
Vessel/Engine Information Emission Rates for a Single Engine (g/bhp-hr)Emission Rates (lb/hr; estimates for each row are totals over the number of engines listed in column K for that row)
Appendix C
Geotechnical Design Report
June 2021 | i
Preliminary Geotechnical
Design Report
Carlsbad Desalination Plant Intake Phase 2
Poseidon Water
Carlsbad, California
June 2021
ii | June 2021
June 10, 2021 Poseidon Water 5780 Fleet Street, Suite 140
Carlsbad, CA 92008
Attn: Mr. Patrick Crain
Project Manager
Subject: Carlsbad Desalination Plant Intake Phase 2
Preliminary Geotechnical Design Report
This preliminary geotechnical design report presents geotechnical recommendations to support
the preliminary design of the project.
If you have any questions regarding this report, please do not hesitate to contact the undersigned.
We appreciate this opportunity to be of service.
Respectfully submitted,
HDR ENGINEERING, INC.
Matt Dennerline, PE, GE 2955 Senior Engineer - Geotechnical
Jim Starick, PE, 77738
Project Manager - Geotechnical Reviewed by Gary R. Goldman, PE, GE 2587 Senior Project Manager - Geotechnical
June 2021 | iii
Contents
1 Introduction .......................................................................................................................................... 1
1.1 Project Description .................................................................................................................... 1
1.2 Purpose and Scope ................................................................................................................... 1
2 Geotechnical Field and Laboratory Investigations .............................................................................. 3
2.1 Previous Explorations ................................................................................................................ 3
2.2 Subsurface Exploration ............................................................................................................. 3
2.3 Geotechnical Laboratory Testing .............................................................................................. 4
3 Geotechnical Findings ......................................................................................................................... 5
3.1 Existing Surface Conditions ...................................................................................................... 5
3.2 Geologic Setting ........................................................................................................................ 5
3.3 Site Geology .............................................................................................................................. 5
3.4 Groundwater .............................................................................................................................. 6
3.5 Subsurface Conditions .............................................................................................................. 6
3.6 Engineering Properties of Subsurface Materials ....................................................................... 7
3.6.1 Shear Strength ............................................................................................................. 7 3.6.2 In-situ Moisture Content and Density ........................................................................... 8 3.6.3 Corrosion Potential ....................................................................................................... 8
3.7 Scour, Erosion, and Sedimentation Potential............................................................................ 9
3.8 Faulting and Seismicity ............................................................................................................. 9
3.8.1 Faults ............................................................................................................................ 9 3.8.2 Fault Rupture .............................................................................................................. 10 3.8.3 Seismic Ground Shaking ............................................................................................ 10 3.8.4 Liquefaction and Seismically Induced Settlement ...................................................... 11 3.8.5 Lateral Spreading ....................................................................................................... 12 3.8.6 Seiches and Tsunami ................................................................................................. 12 3.8.7 Earthquake-induced Flooding .................................................................................... 12
3.9 Flooding ................................................................................................................................... 12
3.10 Slope Stability .......................................................................................................................... 13
3.11 Static Settlement ..................................................................................................................... 13
4 Geotechnical Recommendations ...................................................................................................... 14
4.1 Foundations ............................................................................................................................. 14
4.1.1 Foundation Types ....................................................................................................... 14 4.1.2 Spread Footings at Alternative 21B ........................................................................... 14 4.1.3 Piles at Alternative 22................................................................................................. 15
4.2 Retaining Structures and Sheet Piling .................................................................................... 16
5 Construction Considerations ............................................................................................................. 18
5.1 Earthwork and Dredging .......................................................................................................... 18
5.2 Pile Construction ..................................................................................................................... 19
5.3 Cement Type and Corrosion Measures .................................................................................. 20
6 Limitations ......................................................................................................................................... 21
7 References ........................................................................................................................................ 22
iv | June 2021
Tables
Table 3-1. Generalized Soil Design Parameters – Alternative 21B Screen Structure Location ................... 6
Table 3-2. Generalized Soil Design Parameters – Alternative 21B Screen Structure Location ................... 7
Table 3-3. Summary of Corrosion Test Results ............................................................................................ 9
Table 3-4. Principal Active Faults ............................................................................................................... 10
Table 3-5. Seismic Design Parameters ...................................................................................................... 11
Table 4-1. Summary of Lateral Pile Capacities ........................................................................................... 16
Table 4-2. Lateral Load Reduction Factors ................................................................................................. 16
Table 4-3. Lateral Earth Pressures –Walls Under 5-Foot-Height with Engineered Fill .............................. 17
Appendices
Appendix A. Figures
Appendix B. Existing Geotechnical Data by Others
Appendix C. Geotechnical Boring Logs – Current Investigation
Appendix D. Geophysical Investigation
Appendix E. Laboratory Test Results – Current Investigation
June 2021 | 1
1 Introduction
1.1 Project Description
The Poseidon Intake Modifications (Project) are proposed at the Claude “Bud” Lewis
Carlsbad Seawater Desalination Plant (CDP) in Carlsbad, California. The goal of the
Project is to provide a 299 million gallon per day water source to the existing CDP.
Considerations for the proposed improvements will include debris removal, fish screens,
and equipment access. We understand that the new intake structure is required as the
previous water source from the nearby power plant has been decommissioned and will be
demolished. Two alternatives are being considered during this phase of the Project:
• Alternative 21B: A series of wedge wire screens installed on the floor of the
lagoon connected to 4 intake laterals leading to the existing intake. The screen
area will be excavated 5 feet below grade and backfilled with gravel, where
Screens and piping arrangement will be set atop 12-inch thick concrete pads.
• Alternative 22: A new pile supported intake structure will be installed directly north
of the existing intake and will contain a series of bar screens and dual flow fish
screens; there will be a drivable bridge deck for maintenance staff. The bridge is
anticipated to be supported on pile foundations
The approximate Project location is shown on Figure 1 in Appendix A. Conceptual design
drawings are provided on Figures 2 and 3 in Appendix A.
1.2 Purpose and Scope
The purpose of this investigation was to review existing geotechnical data and evaluate
data from our subsurface exploration and laboratory testing, present results of
geotechnical analyses, and provide preliminary geotechnical recommendations of Phase 2
intake concepts. The primary goal of this task order will be to identify design requirements
for Alternatives 21 and 22 structures that would be installed on the Lagoon floor.
The scope of work for the geotechnical design of this Project includes the following tasks:
• Literature Review: Review of various documents pertinent to the Project from
previous work at the CDP. A list of references used in preparation of this report is
presented in Section 7. Relevant existing geotechnical data are included in
Appendix B. Locations of previous explorations are shown on Figures 4 through 6 in
Appendix A.
• Field Exploration and Laboratory Testing: The subsurface exploration program
included drilling, logging, and sampling borings, as well as performing a geophysical
investigation, as described in Section 2.1. Laboratory testing was performed on
selected soil samples collected from the field exploration to evaluate the engineering
properties of the subsurface soils. The approximate location of borings is presented
on Figures 4 through 6 in Appendix A. Boring logs and laboratory test results from the
current investigation are included in Appendix C and Appendix D, respectively.
2 | June 2021
• Seismic Analysis: Regional seismicity and encountered subsurface conditions were
used to perform a ground motion analysis of the Project for use in structural analysis
and design. Seismic hazards were identified and are presented in Section 3.8.
• Geotechnical Design and Analysis: Geotechnical analysis was performed using the
collected data to develop preliminary recommendations for design and construction of
the proposed Project. Preliminary design and construction recommendations are
provided in Sections 4 and 5, respectively.
• Report Preparation: Relevant geotechnical data were compiled in this report along
with our findings, and preliminary recommendations for foundation type selection, and
construction recommendations for proposed structure, including seismic design
parameters for the proposed Project.
June 2021 | 3
2 Geotechnical Field and Laboratory
Investigations
2.1 Previous Explorations
Previous geotechnical investigations have been performed at the site by Ninyo & Moore
(2013 and 2016), Geologic Associates (2008), and Apex/Group Delta (1994).
Investigations included hydrogeologic testing including well pump testing, as well as
geotechnical investigations for land-side improvements. However, none of the previous
investigations took place within the lagoon itself. Selected historical boring logs and
laboratory data are included in Appendix B. Locations of those investigations are
presented on Figures 3 through 6 in Appendix A.
In addition to the geotechnical investigations, we understand that a dredging project was
recently performed which also include bathymetric soundings. The most recent available
bathymetric map is presented on Figure 7 in Appendix A.
2.2 Subsurface Exploration
HDR’s field exploration consisted of advancing three 8-inch-diameter, hollow stem auger
borings to the depth of practical refusal, with final depths ranging from about 46 to 76 feet
below mudline. Each boring was required to be completed in one shift due to the drill rig
being located on a barge with spuds driven into the lagoon floor, which could not be left
overnight and borings could not be re-aligned to progress at a later date. Borings were
designated as A-21-001 through A-21-003.
In addition, a geophysical investigation was performed by our subcontractor, Atlas Inc.,
including two refraction microtremor (ReMi) profiles (RL-1 and RL-2). The ReMi technique
used recorded surface waves contained in background noise to develop a one-
dimensional shear-wave velocity sounding of the study area down to a depth of
approximately 100 feet below ground surface (bgs).
The boring and geophysical profile locations were recorded using handheld GPS
coordinates. The approximate location of the current explorations are shown on Figures 4
through 6 in Appendix A.
Standard penetration tests (SPT) were performed within the borings using a 140-pound
automatic hammer falling freely for 30 inches. The samplers were driven for a total
penetration of 18 inches, or to refusal, and the blow counts per 6 inches of penetration
were recorded. Drive samples were collected from the borings using a modified California
split-barrel ring sampler. The field sampling procedures were conducted in accordance
with ASTM Standard Specifications D 1586 and D 3550 for SPT and split-barrel sampling
of soil, respectively.
The test borings were logged in the field by a member of HDR technical staff. Each soil
sample collected was reviewed and described in accordance with the Unified Soil
Classification System (ASTM D2487). All samples were sealed and packaged for
transportation to a subconsultant’s laboratory. Geotechnical logs of the borings are
4 | June 2021
included in Appendix C. A summary of geophysical investigation is provided in
Appendix D.
2.3 Geotechnical Laboratory Testing
Laboratory tests were performed on selected soil samples to evaluate the geotechnical
engineering properties of subsurface materials. The following laboratory tests were
performed:
• In-situ moisture content and density
• Atterberg limits
• Grain-size distribution
• Direct Shear
• Corrosivity (soluble sulfate contents, chloride, pH, and resistivity).
All laboratory tests were performed in general accordance with ASTM procedures,
except corrosivity tests, which were performed in accordance with Caltrans
procedures. Results of the laboratory tests are summarized in Table E-1 and
presented in Appendix E.
June 2021 | 5
3 Geotechnical Findings
3.1 Existing Surface Conditions
The proposed improvements pertaining to this Project predominantly take place within the
lagoon itself as shown on Figures 2 and 3 in Appendix A. Near the existing intake structure,
the lagoon is bordered with riprap-protected embankments and paved roadways and
parking lots. Several pipe structures and pump houses as well as minor dock and wharf
structures also exist in the Project area. During our field investigation it was noted that
several large underground concrete vault or pipe structures exist, especially those
connecting to the ‘pond’ water area on the west of the proposed improvements. Surfaces
were generally paved and land-side surface elevations in the immediate area of our field
investigations ranged from about +5 feet to +15 feet North American Vertical Datum of
1988 (NAVD88).
Within the lagoon, depths to mudline ranged from about -10 to -19 feet NAVD88 at our
boring locations. A clam-farming operation is in existence in the lagoon and we understand
that it will remain after improvements are constructed. Based on our discussions with the
project team, we understand that a recent dredging project was undertaken and completed
in 2021. Based on our review of the before and after bathymetry, minor or no dredging
occurred at the locations of interest for this Project.
3.2 Geologic Setting
The Project area is in the Peninsular Ranges Geomorphic Province. Agua Hedionda
Lagoon is the mouth of a river cut valley, typical of the several estuaries that indent the
southern California coast. The valley was cut into sedimentary rocks that deeply bury the
older metamorphosed volcanic rocks (the Santiago Peak Volcanics of Jurassic Age) which
crop out approximately two miles east of the head of the lagoon. The volcanics and
associated intrusive igneous rocks of the Southern California Batholith underlie most of
the drainage basin of Agua Hedionda Creek (CDFG, 1976).
3.3 Site Geology
Geologic units encountered during the previous and current explorations, as well as
mapped by CGS (2012) within the Project’s footprint included artificial fill (af), alluvium
(Qol), and Santiago Formation bedrock (Tss). Generalized descriptions of these units are
provided below. Detailed subsurface conditions are provided on the geotechnical boring
logs in Appendix C. A geologic map is presented on Figure 8 in Appendix A. A subsurface
cross section is presented on Figure 9 in Appendix A.
Artificial Fill (af)
Artificial fill was not encountered during HDR’s current investigation within the lagoon but
is noted during previous investigations and may be expected in areas of dry land where fill
may have been placed to raise the grade to its current location. It is generally described
as consisting of silty to clayey sand with some gravel and occasional cobbles.
6 | June 2021
Alluvium (Qol)
Old Lacustrine deposits were noted overlying the Santiago Formation. Previous
investigations noted that this soil unit contained gravel, shells, and cobbles, and ranged
from loose to medium dense. In the current investigation, these deposits generally ranged
from medium dense to dense sands with varying amounts of silt or clay and sometimes
included shells.
Santiago Formation Bedrock (Tss)
The previous explorations identified Santiago Formation bedrock at typical depths ranging
from about 10 to as deep as 182 feet below the ground surface in the Project area. It was
generally encountered as a weakly to strongly cemented clayey sandstones and silty
claystone. The current investigation encountered the formation at depths below mudline
ranging from about 7 to 28 feet, with similar constituency.
3.4 Groundwater
Groundwater in the Project Area is near sea level and influenced by tidal levels. Design
groundwater elevation at approximately +5 feet NAVD88 was considered for our
geotechnical analyses. Various tidal levels may need to be considered for different phases
of the design.
3.5 Subsurface Conditions
Alternative 21B Location: HDR’s Boring A-21-003 was performed to the north, in a deeper
portion of the lagoon near proposed Alternative 21B improvements. In this location, the
mudline was encountered at a depth of about 23 feet below sea level. From the mudline
downward, approximately the upper 28 feet of soil generally consisted of medium dense
to dense poorly graded sand with silt. Beneath this layer, the Santiago Formation was
encountered. The composition of this formation was generally sandstone with occasional
rock clasts, fine sand, and varying fines content. It was recovered as a very dense soil, or
a relatively soft rock. A generalized design soil profile is provided in Table 3-1, below.
Alternative 22 Location: Based on our review of existing data, surface conditions near
existing shoreline at the project area predominantly consist of fill in the upper 15-20 feet
Table 3-1. Generalized Soil Design Parameters – Alternative 21B Screen Structure Location
Generalized Soil Type Elevation1
(feet NAVD88)
Total Unit Weight (pcf)
Static
Friction Angle (degrees) Cohesion (psf)
Sand, Fill, Upper Sediment -18 to -45 125 32 --
Santiago Formation Below -45 130 34 100
Notes: pcf=pounds per cubic foot, psf=pounds per square foot 1 All elevations are approximate.
June 2021 | 7
below ground surface (bgs). The fill generally consists of silty to clayey sand with some
gravel and occasional cobbles. This fill is not noted in our boring logs which were drilled
within the lagoon.
HDR’s Borings A-21-001 and A-21-002 were performed at the southern end of the lagoon
near the location of the proposed Alternative 22 improvements. In these locations, the
mudline was encountered at depths of about 10 to 19 feet below sea level. From the
mudline downward, approximately the upper 5 feet of soil consisted of a medium dense
clayey sand. Beneath this layer, the Santiago Formation was encountered, with
composition similar to that described above at the Alternative 21B Location. A generalized
design soil profile is provided in Table 3-2, below. A subsurface cross section at the
approximate location of Alternative 22 improvements is provided on Figure 9 in
Appendix A.
It is noted that the depths to the Santiago Formation vary greatly in the Project area, as
described in Apex/Group Delta (1994) due to historical incision of the bedrock from stream
flow action. Based on our review of existing data, the depth to the Santiago formation
generally forms a trench whose nadir is located a few hundred feet north of the southern
limit of the lagoon.
3.6 Engineering Properties of Subsurface Materials
Engineering properties of the subsurface materials were developed based on results of
geotechnical field and laboratory tests performed during our subsurface exploration.
Results of these laboratory tests are presented in Appendix E and summarized in Table E-
1. These test results are briefly discussed below.
3.6.1 Shear Strength
Based on the direct shear test results, the cohesion intercept (c) and friction angle (φ)
representing the effective ultimate shear strength of the soils tested ranged from about 50
pounds per square foot (psf) to 100 psf and 30 to 35 degrees, respectively. It is noted that
blow count data suggests that the Santiago Formation materials are very dense, with
sampler refusal encountered in every case. However, direct shear samples tested in this
material were limited to zones where sampler recovery was good, gravel was not present,
Table 3-2. Generalized Soil Design Parameters – Alternative 21B Screen Structure Location
Generalized Soil Type Elevation1
(feet NAVD88)
Total Unit Weight (pcf)
Static
Friction Angle (degrees) Cohesion (psf)
Sand, Fill, Upper Sediment +6 to -20 120 32 --
Santiago Formation Below -20 130 34 100
Notes: pcf=pounds per cubic foot, psf=pounds per square foot 1 All elevations are approximate, and the ground surface profile varies from about elevation +6 feet at each
abutment to -20 feet in the center of the bridge span.
8 | June 2021
and is subject to sample disturbance and stress relief. Therefore, direct shear testing is
likely conservative compared to the actual shear strength in this formation.
Based on the laboratory test results, SPT blow counts, and soil types, generalized design
shear strength parameters and unit weights were developed for various soil types at the
Site. These parameters are presented in Table 3-1 and Table 3-2 and grouped based on
soil type. Specific soil strength parameters used in the pile capacity analysis are presented
in Section 4.1.3.
3.6.2 In-situ Moisture Content and Density
Selected samples were tested for in-situ moisture content and density. In-situ moisture
contents and densities ranged from about 13 to 23 percent (20 percent average) and
from 102 to 123 pcf (109 pcf average), respectively.
3.6.3 Corrosion Potential
Soil samples from previous and current investigations were subjected to analytical testing
to evaluate the potential for corrosion to concrete and ferrous metals using Caltrans
Corrosion Guidelines (2018a). Caltrans guidelines define a corrosive soil as a material in
which any of the following conditions exist: a chloride content greater than 500 parts per
million (ppm); soluble sulfate content greater than 1,500 ppm; or a pH of 5.5 or less. The
tests referenced in this report are only a screening process for indication of soil corrosivity.
A summary of corrosion test results including both historical and current data is presented
in Table 3-3. The subsurface soils at the site, including all samples tested during the
current investigation, have a very high chloride content and very low resistivity and are
therefore considered highly corrosive.
June 2021 | 9
Table 3-3. Summary of Corrosion Test Results
Source Boring Number
Sample Depth (feet) pH Minimum Resistivity (ohm-cm)1
Sulfates (ppm)2 Chlorides (ppm)3
Ninyo and Moore, 2013 B-6 3-5 9.2 660 160 320
Ninyo and Moore, 2016 GHD-1 40-45 6.9 190 580 2,640
GHD-2 1-4 6.7 1,200 920 90
GeoLogic, 2008
B-9 2-4 8.3 1,050 49
Not Tested
B-11 0-3 8.4 5,300 33
B-12 0-2 8.6 7,500 29
B-17 1-3 7.3 500 416
B-18 1-3 7.9 1,400 40
HDR, Current Investigation
A-21-001 10 7.1 96 532 3,772
A-21-001 35 8.5 81 598 5,138
A-21-002 20 8.3 115 463 3,140
A-21-003 30 7.6 84 401 6,107
Notes:
1. Text marked in bold where resistivity is considered ‘Severely corrosive’ (NACE, 1984).
2. Sulfate Class indicated per recommendations of American Concrete Institute (2019) is S0 in all cases, however concrete should be designed for Class S1 due to the presence of seawater.
3. Text marked in bold where chloride content is considered high (Caltrans 2018a).
- ohm-cm = ohm centimeters; ppm = parts per million
3.7 Scour, Erosion, and Sedimentation Potential
We understand that based on the selected alternative, flows within the lagoon may change
from their current conditions. Although outside the scope of our work, we recommend that
scour be evaluated by a hydrologist prior to final design. Severe scour is not anticipated
within the Santiago Formation, although upper sands may be more susceptible to scour.
We understand that, under current lagoon flow regimes, sedimentation of the lagoon
occurs and requires periodic dredging. The effects of sedimentation on proposed
improvements should also be considered, with the influence of proposed improvements’
flows also incorporated into design assumptions.
3.8 Faulting and Seismicity
3.8.1 Faults
Like most of Southern California, the Project area is considered to be seismically active.
Our review of available in-house literature indicates that there are no known active or
potentially active faults that have been mapped at the site, and the site is not located within
a State of California Earthquake Fault Zone (EFZ) (formerly known as an Alquist-Priolo
Special Studies Zone) (Bryant and Hart, 2007).
10 | June 2021
There are several major faults in the Project area; Table 3-4 lists seven of the faults with
the highest risk contribution near the Project and reports fault distance and magnitude.
The faults are sorted by risk contribution using data developed by the U.S. Geological
Survey (2021b). A fault map is provided on Figure 10 in Appendix A. Faulting information
is provided only for site characterization. Design ground motion methodology is described
in Section 3.8.3
Table 3-4. Principal Active Faults
Fault Name RRUP (kilometers)1 Moment Magnitude1
Rose Canyon Fault Zone (RCFZ) 6.8 6.8
Oceanside 13.2 7.0
Carlsbad 12.5 7.1
Elsinore Temecula Section 38.0 7.6
Rose Canyon 7.1 6.5
San Jacinto Anza Section 77.0 8.1
Coronado Bank 32.4 7.5
Notes:
1. Faults sorted by risk contribution utilizing a 975-year return period for Site Class C and conterminous dynamic 2014 fault data. Rrup = closest distance from the site to fault rupture plane which is calculated using USGS (2021b) methodology. Magnitude per USGS (2021b) data.
3.8.2 Fault Rupture
Based on our review of the referenced reports and geologic maps, the Project is not
traversed by any known active or potentially active faults. Therefore, the risk of surface
fault rupture for the project is considered low.
3.8.3 Seismic Ground Shaking
To reduce the effects of ground shaking produced by regional seismic events, seismic
design should be performed in accordance with the applicable building codes. The seismic
parameters were estimated using the SEA/OSHPD Hazard Tool (SEA, 2021) and in
accordance with the 2019 California Building Code (CBC) and ASCE/SEI 7-16 Standard
(ASCE, 2017).
It is noted that the reports available for review (Ninyo & Moore, 2016) utilized slightly
different site coordinates and a different site class due to the different ground conditions
on land-side improvements. Additionally, the geophysical evaluation performed for this
project indicated a soil profile with a site class of D. However, this evaluation was
performed from the shore and included upper fill soils not observed at the lagoon floor,
where the improvements are proposed and where shallow bedrock was observed. The
values provided in Table 3-5 are considered appropriate for the Alternative 22 bridge as
described in this report.
June 2021 | 11
Table 3-5. Seismic Design Parameters
Category Coefficient
Site Class C
Latitude 33.13870
Longitude -117.33808
Mapped (5% damped) spectral response acceleration parameter at short period (0.2 sec), SS 1.111
Mapped (5% damped) spectral response acceleration parameter at long period (1.0 sec), S1 0.4
Short period (0.2 sec) site coefficient, Fa 1.2
Long period (1.0 sec) site coefficient, Fv 1.5
Spectral response acceleration parameter at short period (0.2 sec), SMS 1.334
Spectral response acceleration parameter at long period (1.0 sec), SM1 0.6
Design (5% damped) spectral response acceleration parameter at short period (0.2 sec), SDS 0.889
Design (5% damped) spectral response acceleration parameter at long period (1.0 sec) SD1 0.4
Peak Ground Acceleration (PGA) (g) 0.493
Site Modified PGA (PGAM) (g) 0.591
Seismic Design Category (1) D
Notes: (1) Based on a Risk Category II. Seismic Design Category to be confirmed by structural engineer.
3.8.4 Liquefaction and Seismically Induced Settlement
Liquefaction is the loss of soil strength or stiffness due to a buildup of pore-water pressure
during ground shaking. Liquefaction is associated primarily with loose (low density),
saturated, fine- to medium-grained, cohesionless soils. Effects of liquefaction can include
sand boils, settlement, bearing capacity failures, and lateral spreading. Seismically
induced settlement consists of dry dynamic settlement (above groundwater) and
liquefaction-induced settlement (below groundwater). This settlement occurs primarily
within loose to moderately dense sandy soil due to reduction in volume during and shortly
after an earthquake event. The Project is located within an area designated as potentially
liquefiable by the County of San Diego (2021). A liquefaction susceptibility map is provided
on Figure 11 in Appendix A.
Based on our preliminary evaluations, an isolated zone of liquefiable soil may exist
beneath the proposed intake structure for Alternative 21B. However, due to the flexible
nature of the proposed improvements at that location, we do not anticipate that liquefaction
considerations should preclude feasibility of the proposed alternative.
Near the proposed improvements for Alternative 22, Santiago Formation bedrock was
encountered at shallow depth and liquefiable soil was not noted during our field
investigation. Ninyo & Moore (2016) noted liquefiable soils at some land-side locations.
12 | June 2021
However, their nearest CPT (designated as T-13) does not appear to indicate loose sands,
and encounters refusal (presumably Santiago Formation) at a depth of about 20 feet bgs.
Therefore, liquefaction is not anticipated to be a major design consideration for this
alternative.
3.8.5 Lateral Spreading
Lateral spreading is a type of landslide motion generally characterized by progressive
cracking and ground motion near a slope face. Lateral spreading is generally associated
with liquefiable soils which allow the slope face and surrounding area to flow during or
shortly after earthquake ground motions.
Ninyo & Moore (2016) described the potential for lateral spread to exist near the pump
station building. Due to the highly variable nature of the soils across the site, the potential
for lateral spread should be analyzed on a Project-element-specific basis. As described
above, based on the available data liquefaction is not anticipated to be a major
consideration and the depth to bedrock near the proposed Alternative 22 improvements is
relatively shallow. Near Alternative 21B, improvements are located farther from the shore
of the lagoon where slopes are relatively flat. Therefore, lateral spreading is not anticipated
to be a major design consideration to these Project elements.
3.8.6 Seiches and Tsunami
Seiches are large waves generated in enclosed bodies of water in response to ground
shaking. Tsunamis are waves generated in large bodies of water by fault displacement or
major ground movement. The State of California (2009) maps the project site within a
tsunami inundation area. Additionally, the proposed improvements are located within an
enclosed body of water that may be susceptible to seiche action. Therefore, the risks of
seiche and tsunami exist. A site-wide safety and operational plan should be developed for
safety and operational measures during a potential seiche or tsunami event. Although
outside the scope of this geotechnical report, the potential for seiche or tsunami should be
considered in the design of project elements that may be adversely impacted. A tsunami
inundation map is presented on Figure 12 in Appendix A.
3.8.7 Earthquake-induced Flooding
Earthquake-induced flooding is caused by dam failures or other water-retaining structure
failures as a result of seismic shaking. Our review of the California Department of Water
Resources Map (CADWR, 2021) found that the project area is not located within areas of
potential susceptibility to dam inundation. The potential for earthquake-induced flooding is
considered low.
3.9 Flooding
Our review of the San Diego GIS Map (SANDAG, 2021) found that the project area is
located within a 100 year floodplain. Therefore, the potential for flooding at the Project site
exists.
June 2021 | 13
3.10 Slope Stability
The project area is located within a relatively flat terrain. Existing and proposed slopes are
considered stable for the static and pseudo-static conditions with final slopes of
2H(horizontal): 1V(vertical) or shallower. Due to the shallow nature of existing slopes in
the vicinity of proposed improvements, and the relatively shallow depth to bedrock,
improvements are considered relatively stable. Global stability of proposed permanent
sheet pile or other retaining systems should be evaluated, however they are anticipated to
be stable if founded into the Santiago Formation bedrock. If steeper proposed slopes or
other major earthwork modifications are proposed, they should be reviewed by the
geotechnical engineer.
3.11 Static Settlement
Deep, saturated layers of silts and clays which are prone to settlement issues are generally
not prevalent near the proposed improvements. Alternative 21B proposes to support intake
structures on the lagoon floor but are relatively lightly loaded. See additional discussion on
Alternative 21B foundations in Section 4.1. Alternative 22 proposes to construct a bridge
on pile foundations which will derive support from deeper relatively incompressible layers.
Therefore, based on the proposed improvements and the lack of compressible soils
present, static settlement is not anticipated to be a design issue.
14 | June 2021
4 Geotechnical Recommendations
Based upon HDR’s evaluation of the subsurface conditions and geologic information
(obtained from previous geotechnical reports by other consultants or available online
resources), our conclusion is that the proposed Project is feasible from a geotechnical
standpoint provided that the recommendations presented in this report are properly
incorporated in the design and construction of the Project. The recommendations in this
report are considered a minimum and may be superseded by updated geotechnical
recommendations or more stringent requirements of the structural engineer and/or the
governing agencies. HDR should be notified, in a timely manner, of changes in the Project
plans that might impact recommendations in this report.
4.1 Foundations
4.1.1 Foundation Types
Alternative 21B – As described in Section 1.1, this alternative proposes to construct an
intake structure in a deeper portion of the lagoon with relatively lightweight submerged
structures supported on concrete pads. Based on our understanding of the proposed
improvements, these structures can be supported directly on a prepared lagoon floor as
described in this report.
Alternative 22 – As described in Section 1.1, this alternative proposes to construct a bridge
spanning generally east to west across the lagoon near its southern edge. This structure
can be supported on pile foundations. If allowed, driven piles likely represent the most cost
effective and rapid construction method. It should be noted that the small concrete dock
just east of the proposed bridge location is supported on steel and concrete piles which
appear to have been driven in place. Appropriate driven pile types may include HP piles
such as HP14x89 piles, or piles such as Caltrans Standard Plan Class 200 piles (Caltrans,
2018b) including 16-inch pipe piles, or precast concrete or octagonal piles. Alternatively,
drilled piles may also be constructible. We understand that the foundation type selection
will also be based on potential environmental impacts. Preliminary recommendations and
considerations for both pile alternatives are provided in this report.
4.1.2 Spread Footings at Alternative 21B
Based on our understanding of the proposed improvements for Alternative 21B, a floating
perimeter screen is proposed with submerged screen structures supported on concrete
pads. We understand that the improvements are connected to flexible HDPE intake piping
and minor settlements or dislocations are not anticipated to be problematic. However, to
mitigate the potential for large settlements or rotation of the structures, the upper loose
mud/soils should be dredged and replaced with gravel as described in Section 5.
Once the lagoon floor has been prepared, we recommend an allowable bearing pressure
of 2,000 psf. For short term loading (seismic, impact, etc), an allowable bearing capacity
of 3,000 psf may be used. An allowable coefficient of friction of 0.4 may be used between
the precast concrete panels and the prepared rock. Although loads are unlikely to
June 2021 | 15
approach these allowable pressures and static settlement is anticipated to be negligible,
some settling of the rock layer may occur. This settlement is likely in the range of 2 inches
or less but will be highly dependent on contractor methods. Additionally, some level of
settlement should be anticipated from a design seismic event, in the range of
approximately 3 inches.
4.1.3 Piles at Alternative 22
Based on discussion with the design team and our review of the preliminary Project
drawings, 18-inch diameter cast-in-drilled-hole (CIDH) piles are under consideration at this
location. In addition, we recommend that driven piles be considered as discussed in
Section 4.1.1. Preliminary capacities for these two pile types are provided in this report
based on the soil design profile provided in Table 3-2, with the ground surface beginning
at elevation -15 feet NAVD88.
Axial Capacity – Axial capacities for 18-inch diameter CIDH piles were estimated using
SHAFT software (Ensoft, 2017). Pile capacity was estimated using skin friction only, with
end bearing neglected due to the difficulty for good cleanout in underwater drilling
conditions. Axial capacities for driven piles were estimated using APILE (Ensoft, 2019a).
Driven piles will derive significant capacity from end bearing in the Santiago formation.
Scour was not considered in the design since scour protection in the area of the piles is
planned.
Based on discussions with the design team, we estimate that unfactored axial pile loads
are in the range of 150-200 kips. A factor of safety of 2 is recommended by the CBC (2019)
for piles. Based on these considerations, estimated pile lengths are approximately 65 feet
(tip elevation of about -80 feet NAVD88) for 18-inch CIDH piles or approximately 30 feet
(tip elevation of about -45 feet NAVD88) for Class 200 driven piles. These lengths will be
dependent on final loading conditions, pile spacing, and other factors and should be
confirmed prior to final design. A preliminary pile capacity chart for CIDH piles is provided
on Figure 13 in Appendix A.
Lateral Capacity – Lateral capacities for both 18-inch CIDH and 14-inch square driven
concrete piles were estimated using LPILE (Ensoft, 2019b). Other pile types (see Section
Section 4.1.1) may also be used but have not been analyzed at this preliminary stage. A
critical pile length (beyond which, additional lateral capacity is not gained) of approximately
20 feet was estimated. Lateral capacities of piles based on deflections of 0.25, 0.5, and
1.0 inch for pinned-head connections are presented in Table 4-1. The estimated lateral
capacities presented in Table 4-1 are for a single pile, and do not incorporate a reduction
for pile group action. Depending on final pile layout and loading direction, a reduction may
be necessary and pile head connections may require re-evaluation. Pile groups with
center-to-center spacing of less than 8 diameters should use the P-multiplier values listed
in Table 4-2.
16 | June 2021
Table 4-1. Summary of Lateral Pile Capacities
Category
Pile Head Deflection
0.25 inch 0.5 inch 1.0 inch
18-inch CIDH 14-inch Driven 18-inch CIDH 14-inch Driven 18-inch CIDH 14-inch Driven
Pile Head Shear(1) (kips) 12 10 15 17 21 27
Flexural Depth(2) (feet bgs) 9 9 9 9 9 10
Maximum Moment (kip-inch) 620 580 850 1,000 1,200 1,740
Depth to Max. Moment(3) (feet) 6 6 6 6 6 7
Notes: 1 Lateral capacities are estimated for a single pile as described in this section. 2 First point of zero deflection. 3 Depth measured below estimated finished ground surface of -15 feet elevation NAVD88.
Table 4-2. Lateral Load Reduction Factors
Center-to-Center Pile Spacing in the Direction of Loading
P-Multipliers
Row 1 Row 2 Row 3+
2.0 B 0.60 0.35 0.25
3.0 B 0.75 0.55 0.40
5.0 B 1.0 0.85 0.70
7.0 B 1.0 1.0 0.90
Source: Caltrans Amendments to AASHTO LRFD Bridge Design Specifications- Eighth Edition (2019).
Notes:
P-multipliers are ratio of load resistance of piles in group to a single pile B = diameter or width of the pile
4.2 Retaining Structures and Sheet Piling
We understand that sheet piles may be utilized for erosion control or for segregation of
water but are not planned for soil retention. Where these sheet piles may experience
loading such as from differential hydraulic head, potential impact, etc, they should be
evaluated prior to final design. Driving of these piles may be difficult within the Santiago
Formation, if required. See additional discussion in Section 5. Viable alternatives to
traditional sheet piling systems may include secant pile construction or king piles.
For minor retaining structures under 5 feet in height, located outside of the lagoon area
(above water), retaining engineered fill, and supported on a minimum of 2 feet of
engineered fill, the following recommendations apply. Table 4-3 provides a set of
equivalent fluid pressure (EFP) values for the preliminary design of earth-retaining
structures at the project site with the specifications described above. The EFP concept is
commonly used in the estimation of the design lateral earth pressures applied to a retaining
wall or shoring system. EFP is expressed as the unit weight of a fluid (in pcf), which would
June 2021 | 17
generate a hydrostatic pressure equal to the anticipated lateral earth pressure at a given
depth. This horizontal pressure is applied to a vertical plane extending up from the heel of
the wall base, and the weight of soil above the wall heel is included as part of the wall
weight. A soil unit weight of 120 pcf may be used for calculating the weight of the soil over
a structure.
Table 4-3. Lateral Earth Pressures –Walls Under 5-Foot-Height with Engineered Fill
Condition Equivalent Fluid Pressure (pcf)
Level Backfill
Active 34
At-Rest 53
Passive 400 (to maximum 4,000 psf)
The above values do not contain a factor of safety, so the structural engineer should apply
the applicable factors of safety and/or load factors during design. The design values
indicated above are based upon drained conditions. Proper drainage should be provided
behind the walls to prevent buildup of hydrostatic pressure there. If taller retaining walls
are proposed on the Project, they should be evaluated by the geotechnical engineer before
final design.
18 | June 2021
5 Construction Considerations
5.1 Earthwork and Dredging
Above-Waterline Earthwork – Import soils should meet environmental standards, be
granular in nature (with percent passing No. 200 sieve less than 35 percent), free of
organic material, free of rock greater than 3 inches in maximum size, have very low
expansion potential (with an expansion index less than 21 per ASTM D4829 and plasticity
index less than 15), and have a low corrosion impact (classified as non-corrosive per
guidelines by Caltrans [2018a], NACE [1984], and ACI [2019], as applicable; see Section
3.6.3.).
Exposed subgrade soil surfaces, including all excavation bottoms, should be observed by
a representative of the geotechnical engineer prior to placement of fill. Competent
excavation bottoms should be scarified to a minimum depth of 8 inches, moisture-
conditioned to approximately two percent above the optimum-moisture content, then
compacted to a minimum of 95 percent relative compaction (per ASTM D1557) for
structural areas. For non-structural areas, fill should be compacted to at least 90 percent
relative compaction (per ASTM D1557).
Alternative 21B – Based on our review of existing preliminary drawings for Alternative 21B,
the concrete pads supporting the intake screens are proposed to be placed directly on the
lagoon floor. We recommend that a dredging program take place to level the proposed
placement area and remove soft upper sediments that may have accumulated in the upper
several feet. A leveling course consisting of gravel or rock should be placed to provide
even, level support to the proposed precast panels. This leveling course may be omitted if
it can be established that the lagoon floor can be dredged to a satisfactory condition with
regard to the tolerances of the precast structure. A submittal of proposed materials and
methods should be made by the contractor for the approval of the geotechnical and
structural engineers prior to acquiring materials and construction.
Alternative 22 – Based on our review of existing preliminary drawings for Alternative 22, a
gravel or tremie concrete pad is proposed within the lagoon beneath the bridge with a top
height of about -15 feet NAVD88 and a thickness of about 5 feet. We understand that this
will serve as a leveling pad and for erosion control in the area. On either side of the leveling
pad area, a sheet pile is indicated on the preliminary drawings. However, due to shallow
depth to bedrock in this location, the sheet piling may not be required depending on its
intended purpose. It may be practical to extend or widen the rock/concrete pad laterally,
and vertically to the Santiago Formation bedrock, which may eliminate the need for sheet
piling for this use. We understand that in the past, driving of sheet piles in the area has
been met with difficulty in the Santiago Formation and required predrilling. Where sheet
piling is needed, difficult driving should be anticipated within the Santiago Formation.
Prior to construction of Alternative 22, a dredging and surveying program should be
performed to ensure that bottom excavation has been performed to at least elevation -20
feet NAVD88. It may be practical to end the dredging at a shallower depth if Santiago
Formation is encountered sooner and is not practical to dredge. The contractor should
ensure that the gravel or concrete pad is placed as level as practical. A submittal of
June 2021 | 19
proposed materials and methods should be made by the contractor for the approval of the
geotechnical engineer prior to acquiring materials and construction.
5.2 Pile Construction
We understand that the pile foundations for Alternative 22 may be constructed using either
driven or CIDH methods. Although specific pile construction techniques should be selected
by the contractor in conjunction with the design team, it is critical that certain elements of
pile construction be maintained for the recommendations in this report to remain
applicable. The contractor’s final pile design details and pile installation plan should be
reviewed and approved by the design team including representatives of the geotechnical
engineer.
Sheet Piles – We understand that in the past, driving of sheet piles in the area has been
met with difficulty in the Santiago Formation and required predrilling. Where sheet piling is
needed, difficult driving and/or predrilling should be anticipated within the Santiago
Formation. Viable alternatives to traditional sheet piling systems may include secant pile
construction or king piles.
Driven Piles – Driven piles are a commonly used pile type at wharf and shoreline
construction, and have apparently been constructed at the site (see Section 4.1.1). The
effects of pile driving on adjacent structures should be considered, especially where
existing structures are particularly susceptible to settlement or disturbance. Environmental
impacts of noise and vibration and potential mitigations should also be evaluated.
Pile driving equipment and hammer/cushion details should be selected carefully by the
contractor with consideration of anticipated driving depths, pile types, and subsurface
conditions. Pile driving refusal may be encountered within the Santiago Formation. In order
to achieve minimum pile penetration for lateral pile stability, it may be necessary to predrill
prior to driving piles. The need for these methods are highly dependent on contractor
operations and final pile details.
Corrosion should be considered when evaluating steel pile thickness and sacrificial
thickness should be included, unless other corrosion protection precludes sacrificial steel
loss. A typical estimated corrosion rate for a corrosive soil environment is 0.006 inch per
year on all steel surfaces in the ‘splash zone’ and 0.004 inch per year on steel surfaces in
the ‘immersed zone’ (Caltrans, 2018a).
An indicator pile program should be performed in which at least four piles, spread across
the proposed bridge footprint, are instrumented using Pile Dynamic Analyzer (PDA)
equipment and the capacity should be estimated using a Wave Equation Analysis Program
(WEAP). A recommended hammer energy/blowcount versus capacity relationship should
be developed for estimating capacities in remaining non-instrumented piles. Typically, the
indicator piles should be ordered 5 to 10 feet longer than the estimated pile tips to account
for uncertainty and to establish capacity relationships. This program will also assist in
determining whether/what types of relief drilling or predrilling are required for installation.
It is recommended that pile driving operations be observed and documented by a
representative of the geotechnical engineer to allow for further evaluation of the subsurface
conditions and the pile capacity. The installation of piles should be in accordance with
20 | June 2021
Geotechnical Engineering Circular (GEC) No. 12 FHWA NHI-16-009 Design and
Construction of Driven Pile Foundations (Hannigan et al. 2016).
Drilled Piles – The equipment used for drilled piles should be selected carefully by the
contractor in consideration of its capability to advance the drilled hole and remove soil
cuttings. The contractor should be prepared, with appropriate equipment, to encounter
possible gravel and cobble layers as well as hard Santiago Formation materials. Drilling
operations are recommended to be observed and evaluated by a representative of the
geotechnical engineer to allow further evaluation of the actual subsurface conditions.
Pile construction will occur through the lagoon and into the lagoon floor below
groundwater. Drilling using casing may be necessary to facilitate the construction of the
drilled piles especially in upper soil materials. The installation/removal of temporary casing
or the use of slurry for borehole stability should be in accordance with the Caltrans
Standard Specifications (Caltrans, 2018c) to reduce the potential for adversely affecting
the frictional resistance of the soils and thereby reduce the load capacity of the piles.
Environmental impacts of slurry and drilling spoils in the lagoon, and potential mitigation,
should also be evaluated.
To maintain a relatively clean hole and achieve high quality CIDH pile construction, it is
recommended that the entire construction operation, including drilling of the CIDH pile
borehole, lowering of the reinforcing cage, and concrete placement, be carried out
consecutively in the same day. Piles within 5 diameters of a freshly poured pile may only
be drilled a minimum of 24 hours after placement of concrete. It is recommended that a
tremie pipe with pumped concrete be used to avoid concrete segregation during CIDH pile
construction.
5.3 Cement Type and Corrosion Measures
A discussion of soil corrosion results is included in Section 3.6.3. The tests included in this
report are only a screening process for indication of soil corrosivity. In general, project
elements should be designed for a severe corrosive environment including salt/seawater
exposure toward ferrous metals and concrete structures. As described in Section 3.6.3,
soils have a very high chloride content and very low resistivities. Type V cement is
recommended for the Project, and appropriate strength and mix requirements should be
selected based on individual structures’ design life and structural requirements. For
sensitive buried metallic elements, a corrosion engineer should be consulted.
Corrosion should be considered when evaluating steel pile thickness and sacrificial
thickness should be included, unless other corrosion protection precludes sacrificial steel
loss. A typical estimated corrosion rate for a corrosive soil environment is 0.006 inch per
year on all exposed steel surfaces in the ‘splash zone’ and 0.004 inch per year on steel
surfaces in the ‘immersed zone’ (Caltrans, 2018a). For steel exposed on multiple surfaces,
for example sheet piling, these numbers apply independently to each exposure face.
June 2021 | 21
6 Limitations
This geotechnical report has been prepared for the use of HDR and Poseidon Channelside
for the proposed Carlsbad Desalination Plant Intake Phase 2 Project. The report may not
be used by others without the written consent of our client and our firm. The conclusions
and recommendations presented in this report have been based upon the generally
accepted principles and practices of geotechnical engineering utilized by other competent
engineers at this time and place. No other warranty is either expressed or implied.
Additionally, the conclusions and recommendations presented in this report have been
based upon subsurface information collected by other consultants and the subsurface
conditions encountered at discrete and widely spaced locations and at specific intervals
below the ground surface. The reported soil and groundwater conditions were interpreted
at the exploration locations only. This information was used as the basis of analyses and
recommendations provided in this report. Conditions may vary between the exploration
locations. If conditions encountered during construction differ from those described in this
report, HDR’s recommendations may be subject to modification and such variances should
be brought to our attention to evaluate the impact upon the recommendations presented
in this report.
22 | June 2021
7 References
American Concrete Institute (ACI). 2019. Building Code Requirements for Structural Concrete (ACI
318-19).
Apex Geotechnology, Inc. in association with Group Delta Consultants, Inc., 1994, Hydrogeologic Investigation, SDG&E Encina Power Plant, Carlsbad California.
American Society of Civil Engineers (ASCE), 2017, Minimum Design Loads for Buildings and Other Structures (ASCE/SEI Standard 7-16), Reston, Virginia.
Bryant, W.A., and Hart, E.W. 2007. Interim Revision: Fault Rupture Hazard Zones in California, Alquist-Priolo Earthquake Fault Zoning Act with Index to Earthquake Fault Zones Maps: California Geological Survey, Special Publications 42.
California Building Standards Commission, 2019, California Building Code, Title 24, Part 2, Volumes 1 and 2.
California Building Code, 2019, Section 1810.3.3.1.7.
California Department of Fish and Game (CDFG), 1976, The Natural Resources of Agua Hedionda
Lagoon.
California Department of Transportation (Caltrans), 2018a, Corrosion Guidelines, Version 3.0, March.
Caltrans, 2018b, Standard Plans.
Caltrans, 2018c, Standard Specifications.
California Department of Water Resources, 2021, Division of Safety of Dams, California Dam Breach Inundation Maps, https://fmds.water.ca.gov/maps/damim/ website, accessed April 19.
California Geological Survey (CGS). 2012. Special Report 217: Geologic Compilation of Quaternary Surficial Deposits in Southern California (2012 Revision).
Ensoft, 2017, SHAFT, Version 2017.8.10.
Ensoft, 2019a, APILE, Version 2019.9.3.
Ensoft, 2019b, LPILE, Version 2019.11.02.
FHWA, 2016, Design and Construction of Driven Pile Foundations, Publication No. FHWA-NHI-16-
009, July.
GeoLogic Associates, 2008, Geotechnical/Environmental Report, Proposed Carlsbad Desalination
Project, Reconfigured Site, Encina Generating Station, Carlsbad, California, dated September 22.
Hannigan, Patrick J., Rausche, Frank, Likins, G. E., Robinson, B. R., Becker, M. L., 2016, Design and Construction of Driven Pile Foundations, FHWA-NHI-16-009, Geotechnical Engineering Circular (GEC) No. 12-Vol. 1. U.S. Dept. of Transportation, Federal Highway Administration, September 2016.
National Association of Corrosion Engineers (NACE). 1984. Corrosion Basics, An Introduction.
Ninyo & Moore, 2013, Geotechnical Evaluation, Carlsbad Seawater Desalination Plant (Intake Pump Station Site), 4600 Carlsbad Boulevard, Carlsbad, California, dated August 20.
Ninyo & Moore, 2016, Geotechnical Evaluation, New Intake/Discharge Structure, Carlsbad Seawater Desalination Plant, 4600 Carlsbad Boulevard, Carlsbad, California, dated November 30.
SANDAG, 2021, San GIS Parcel Lookup Tool, https://sdgis.sandag.org/ website, accessed April 19.
State of California, 2009, Tsunami Inundation Map for Emergency Planning, Oceanside
Quadrangle/San Luis Rey Quadrangle, San Diego County; produced by California Emergency Management Agency, California Geological Survey, and University of Southern California – Tsunami Research Center; dated June1, mapped at 1:24,000 scale.
June 2021 | 23
Structural Engineers Association of California (SEAOC) and OSHPD, 2021, Seismic Design Maps, https://seismicmaps.org/ website, accessed April 15.
United States Geological Survey (USGS), 2021a, Quaternary Fault and Fold Database for the
United States, accessed November 10, 2020, from USGS web site: http//earthquake.usgs.gov/hazards/qfaults/
USGS, 2021b. Unified Hazard Tool, < https://earthquake.usgs.gov/hazards/interactive/>
Appendix A. Figures
Figure 1
0 1 2
Miles ±
VICINITY MAP
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICES
POSEIDON - AGUA HEDIONDA LAGOON
Figure 2
Figure 3
Figure 4
0 50 100
Feet ±
BORING LOCATION MAP (1 of 3)CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Esri,HERE,Garmin,
Legend
HDR Current Field Investigation Boring
P Apex and Group Delta Boring (1994)
!Apex and Group Delta Well (1994)
Alternative 21B Location
Figure 5
0 25 50
Feet ±
BORING LOCATION MAP (2 of 3)CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Esri,HERE,Garmin,
Legend
HDR Current Field Investigation Boring
P Apex and Group Delta Boring (1994)
?Ninyo & Moore Boring (2013, 2016)
"Ninyo & Moore Cone Penetration Test (2016)
Alternative 22 Conceptual Layout
Figure 6
0 25 50
Feet ±
BORING LOCATION MAP (3 of 3)CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Esri,HERE,Garmin,
Legend
!(Geologic Associates Boring (2008)
?Ninyo & Moore Boring (2013, 2016)
"Ninyo & Moore Cone Penetration Test (2016)
Alternative 22 Conceptual Layout
±
GEOLOGY MAP
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Reference: CGS, 2012.
Qol Old Lacustrine, Playa, and Estuarine (Paralic) Deposits—Slightly
to moderately consolidated, moderately dissectedfine-grained sand, silt, mud, and clay from lake, playa, andestuarine deposits of various types.
Figure 8
0 300 600
Feet
Coarse-grained Terirary age formations of sedimentary origin; Santiago formation, sandstone, conglomerate, and claystone.
Holocene marine beach deposits typically consisting of poorly-gradedsands and gravel size particles.
20�
�Ill ....NM-GHD-3
A-21-001 A-21-002
NM-T-13 ■ _,,,---ReMi Line 1 ReMi Line 2
PLAN VIEW ,., .,-"'¢" �0 �---� u� --¢" C: _Q C) o-z me �o o N>�
AX-B-2
0 50 100
Horizontal Scale (feet)
CW)�� .... �=a �=�------------f-----r--B ...:. � � --6-�;g--7 rJ !it�! ---r-� = ��'; -'� ---r-
-20a ;; -g .... � 1l, <;> ii � . 1 _ � � � r SC �-ril -------1 ..;, � � � gj � :E wen-�Approximate a; � 6i . j------------1 z � £'a:: c5i J z ('.) a:Gro )nd Line
� / SM • •• • 10 10 :_ ---------i��ll �'---' --55{}-ifit. : :�11 --------_____ :_2 ___ \ ________ ----------_:________ -�--------7 ----->--537 ---
/ . . .,---rt---;=; . :. :,,
O f-----� �f.i� 1J • ; !-21 \ \_ Groµndwater ij ! � = ;; / 667 SM .�,i-4-8------+-----------, O00 6 674 • : : rn (Approximate) N w � a � • :; -10 ¥----------------------, ---------------------------10
899
-20�\ &i·,-o
I�-� 913 i'-:. ,...§� SNST • z� £.L::: N W .2., •50/211 L''.I • c:i:ene -.;, I ':• 21C!) a. � • :r: 999 .L1,•: ,, C .,. 5016" fu co I-+-----+---J ·
� ' '--tt--+-+-+--• �-,: •
---t----------j -204-1 °"° , ;� i:62
�
I -p ''-•
I -30 r ------------r -------------· ��� -------------------���� � 50/�'---------------� �:::::_ -------5-� :� - --_-:_ -r ------·------:1! � -:: -----------------------30·.�. 5013" � ... : �0/5" 10 ,--( 1,252 -�: z 0
_J w
� � I .,...,. d: 3a
-40 >--------+--------+---+--1,-26_1 ___ _____, ______ -+-----1� .50/5" f t0/1' " ___f:
SC-��--1 -0------+----------< -40
l:i' 5ot2"� 50/4" 20 e---!h"+-+-+--+-+-1 SM ··
-50
;:,.,• •''I: 22 r,+ • "
=-=-· I 20 ;-..;. 50/4'' � 50/6" 1,272
-50
�� � SM I. 19.. � � . -60 f-------f-------H--------1---------l-t,;·•:t"-J-50/6"� -014' "L-=:-;�,�-------+---------1 -60 1.247 t ::;-I 11 f=ili 50/3" � � 510/6" 14 � 1,569 -10 ...------------f-- - - - - - - - - - - - --- - - - - - - - - - - - - - - - - - - - - - --f-- - - - - - - - - - - - - - - - - - - - --i ·ro15"-------------------------------sNsr � :.: ·so,3-;;----------------------10
� 5014" �� 100/5' ... � � .:.. -80 f-------+------+-+--------1-------+------+-----�..i-014�-----+----------,f----------+-------+--------t -80�I 1,583 !;"i" :::;,,i 50/6"
-900-----------su-----------100 __________ 1so __________ 200 __________ 2so----------3}0 ----------350 ___________ 400 ___________ 45o ___________ soo ___________ s5090
DISTANCE ALONG PROFILE (feet)
20
0
0 50
Horizontal Scale (feet)
Map Legend
() HDR Current Field Investigation Boring
0 Apex and Group Delta Boring (1994)
••....Ninyo and Moore Boring (2013, 2016)
■Ninyo and Moore Cone Penetration Test (2016)
Note: See Geotechnical Report for Boring Details
Boring Legend
C? C ::c <;> :E z Symbol -SM 28 -N60 -See Note 2 Group
�
Material Change
Notes: 1.Abbreviation for soil group is basedon AS TM D2487-11, Unified SoilClassification System2.N60 blow counts corrected for hammerenergy and sampler type. ModifiedCalifornia sampler N-values correctedusing 0.6 factor.5;l. Water level reading at the time of drilling REF = Refusal {Blow counts greater than 50/6 inches) GS Elev = Ground surface elevevation
Material Graphics
� Silty, Clayey SAND ■Asphalt� Sandy Lean CLAY
100
IIW SandySILTl:i1 Aggregate Base� Sandstone
ml ClayeySILT � Clayey SAND f::•fill Poorly-Graded SAND with SILT[fl SiltySAND
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICES POSEIDON -AQUA HEDIONDA LAGOON
DATE: MAY 2021
CROSS SECTION A-A' EXHIBIT 9
0 2.5 5
Miles ±
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
REGIONAL FAULT MAP
Reference: USGS, 2020, ARCGIS Online Database
! ! !Historic (< 150 years), inferred location
Historic (< 150 years), moderately constrained location
Historic (< 150 years), well constrained location
! ! !Late Quaternary (< 130,000 years), inferred location
Late Quaternary (< 130,000 years), moderately contrained location
Late Quaternary (< 130,000 years), well constrained location
! ! !Latest Quaternary (<15,000 years), inferred location
Latest Quaternary (<15,000 years), moderately constrained location
Latest Quaternary (<15,000 years), well constrained location
! ! !Undifferentiated Quaternary (< 1.6 million years), inferred location
Undifferentiated Quaternary (< 1.6 million years), moderately constrained location
Undifferentiated Quaternary (< 1.6 million years), well constrained location
Figure 10
±
LIQUEFACTION SUSCEPTIBILITY MAP
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Reference: County of San Diego, 2021
Liquefaction Susceptibility
Figure 11
0 500 1,000
Feet
±
TSUNAMI INUNDATION MAP
CDP INTAKE PHASE 2 GEOTECHNICAL SERVICESPOSEIDON - AGUA HEDIONDA LAGOON
Reference: State of California, 2009.
Tsunami Inundation Area
Figure 12
0 500 1,000
Feet
Notes:
1.For service loading, a Factor of Safety (FoS) of 2.0 should be applied.
2.For seismic loading, a FoS of 1.0 may be used.
3.Design groundwater elevation of +5 feet NAVD88 feet used in analyses.
4.Pile self-weight not considered and may be added to uplift capacity presented above.
PROJECT NO : DESIGNED BY:
CHECKED BY: DATE: Figure 134/23/2021
Preliminary General Design Case
CDP Intake Phase 2 - Poseidon
Agua Hedionda Lagoon, California
ULTIMATE PILE CAPACITY
MD
10295144
JMS
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 100 200 300 400 500
Pile Tip Elevation (feet NAVD88)Ultimate Axial Capacity (kips)
ULTIMATE PILE CAPACITY
18-inch CIDH Pile
Compression
Uplift
Approximate Cutoff Elevation ‐15 feet
Appendix B. Existing
Geotechnical Data by Others
0
5
10
15
20
24
15
12
6.7
15.3
116.3
109.2
GM
SC
SP-SM
SM
ASPHALT CONCRETE:Approximately 3.5 inches thick.
AGGREGATE BASE:Gray, damp, dense, silty GRAVEL with sand; approximately 3 inches thick.
FILL:Brown, moist, medium dense, clayey SAND; scattered gravel.
Light brown, moist, medium dense, poorly graded SAND with silt; scattered gravel.
Reddish brown to brown, wet, loose, silty SAND; scattered gravel and concrete chunks;
roots.
Saturated.
BORING LOG
CARLSBAD SEAWATER DESALINATION PLANT(INTAKE PUMP STATION SITE), CARLSBAD, CALIFORNIA
PROJECT NO.
107383002
DATE
7/13
FIGURE
A-8DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 1/29/13 BORING NO.NMB-7
GROUND ELEVATION 17' (MSL)SHEET 1 OF
METHOD OF DRILLING 10" Hollow-Stem Auger (Baja Exploration) (CME 75)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY BTM/NMM LOGGED BY BTM REVIEWED BY GTF
5
20
25
30
35
40
15
19
20
27
SP-SM
SM
ALLUVIUM:Brownish gray, saturated, medium dense, poorly graded SAND with silt; scattered gravel;shell fragments; micaceous.
Cobbles.
Brownish gray to reddish gray, saturated, medium dense, silty SAND; interlayered withgray clay.
No clay; scattered gravel.
SANTIAGO FORMATION:Light gray, saturated, weakly cemented, silty fine-grained SANDSTONE interbeddedwith gray, saturated, moderately indurated, silty CLAYSTONE.
BORING LOG
CARLSBAD SEAWATER DESALINATION PLANT(INTAKE PUMP STATION SITE), CARLSBAD, CALIFORNIA
PROJECT NO.
107383002
DATE
7/13
FIGURE
A-9DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 1/29/13 BORING NO.NMB-7
GROUND ELEVATION 17' (MSL)SHEET 2 OF
METHOD OF DRILLING 10" Hollow-Stem Auger (Baja Exploration) (CME 75)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY BTM/NMM LOGGED BY BTM REVIEWED BY GTF
5
40
45
50
55
60
50/3"
52
50/6"
50/4"
SANTIAGO FORMATION: (Continued)Brown, saturated, weakly cemented, silty fine-grained SANDSTONE.
Gray.
Brownish gray.
BORING LOG
CARLSBAD SEAWATER DESALINATION PLANT(INTAKE PUMP STATION SITE), CARLSBAD, CALIFORNIA
PROJECT NO.
107383002
DATE
7/13
FIGURE
A-10DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 1/29/13 BORING NO.NMB-7
GROUND ELEVATION 17' (MSL)SHEET 3 OF
METHOD OF DRILLING 10" Hollow-Stem Auger (Baja Exploration) (CME 75)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY BTM/NMM LOGGED BY BTM REVIEWED BY GTF
5
60
65
70
75
80
50/6"
50/4"
50/2"
50/6"
SANTIAGO FORMATION: (Continued)Brownish gray, saturated, weakly cemented, silty fine-grained SANDSTONE.
Brown.
BORING LOG
CARLSBAD SEAWATER DESALINATION PLANT(INTAKE PUMP STATION SITE), CARLSBAD, CALIFORNIA
PROJECT NO.
107383002
DATE
7/13
FIGURE
A-11DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 1/29/13 BORING NO.NMB-7
GROUND ELEVATION 17' (MSL)SHEET 4 OF
METHOD OF DRILLING 10" Hollow-Stem Auger (Baja Exploration) (CME 75)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY BTM/NMM LOGGED BY BTM REVIEWED BY GTF
5
80
85
90
95
100
50/3"
50/4"
50/3"
SANTIAGO FORMATION: (Continued)Grayish brown, saturated, weakly cemented, silty fine-grained SANDSTONE.
Total Depth = 90.3 feet.Groundwater encountered at approximately 16 feet during drilling.Well set shortly after drilling on 1/30/13.
Note: Groundwater may rise to a level higher than that measured in the borehole due toseasonal variations in precipitation and several other factors as discussed in the report.
BORING LOG
CARLSBAD SEAWATER DESALINATION PLANT(INTAKE PUMP STATION SITE), CARLSBAD, CALIFORNIA
PROJECT NO.
107383002
DATE
7/13
FIGURE
A-12DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 1/29/13 BORING NO.NMB-7
GROUND ELEVATION 17' (MSL)SHEET 5 OF
METHOD OF DRILLING 10" Hollow-Stem Auger (Baja Exploration) (CME 75)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY BTM/NMM LOGGED BY BTM REVIEWED BY GTF
5
0
10
20
30
40
14
60
53
50/5"
60
50/4"
50/3"
50/5"
10.4
4.3
15.4
18.9
18.0 107.8
SP FILL:Brown, moist, medium dense, fine to medium SAND; trace silt.Light olive brown; scattered fragments of Santiago Formation.
Reddish brown.
Brown and reddish brown (mottled).
Brown and grayish brown (mottled); scattered gravel; trace clay.
No recovery.
SANTIAGO FORMATION:Gray, moderately cemented, clayey fine-grained SANDSTONE.
Light gray, moderately cemented, silty fine-grained SANDSTONE; scattered manganese
deposits; some fine laminations visible.
Gray; strongly cemented; trace clay.
Brownish gray, moist, strongly cemented, clayey silty fine-grained sandstone; slightlymicaceous; scattered iron-oxide lined root casts.
Light gray; weakly to moderately cemented; silty fine-grained sandstone; massive.
Water added to borehole.
Gray; strongly cemented; fine- to medium-grained; trace clay.
Light gray; moderately cemented.
BORING LOG
NEW INTAKE/DISCHARGE STRUCTURECARLSBAD SEAWATER DESALINATION PLANT, CARLSBAD, CALIFORNIA
PROJECT NO.
107393003
DATE
11/16
FIGURE
A-1DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 9/02/16 BORING NO.GHD-1
GROUND ELEVATION 19' (MSL)SHEET 1 OF
METHOD OF DRILLING 6" Diameter Hollow Stem Auger (Diedrich D50) (Pac Drill)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY CAT LOGGED BY CAT REVIEWED BY GTF
2
40
50
60
70
80
50/4"
50/5"
50/5"
50/5"
12.9
24.6
SANTIAGO FORMATION: (Continued)Grayish brown, moist, moderately cemented SANDSTONE; scattered strongly cemented/
concretionary layers.Clayey.
Trace clay.
Wet.
Light grayish brown; weakly to moderately cemented; no clay.
Light brown.
Light gray.Total Depth = 60.5 feet.Groundwater encountered during drilling at approximately 49 feet during drilling.Backfilled shortly after drilling on 9/02/16.
Note: Groundwater may rise to a level higher than that measured in borehole due toseasonal variations in precipitation and several other factors as discussed in the report.
The ground elevation shown above is an estimation only. It is based on our interpretationsof published maps and other documents reviewed for the purposes of this evaluation. It isnot sufficiently accurate for preparing construction bids and design documents.
BORING LOG
NEW INTAKE/DISCHARGE STRUCTURECARLSBAD SEAWATER DESALINATION PLANT, CARLSBAD, CALIFORNIA
PROJECT NO.
107393003
DATE
11/16
FIGURE
A-2DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 9/02/16 BORING NO.GHD-1
GROUND ELEVATION 19' (MSL)SHEET 2 OF
METHOD OF DRILLING 6" Diameter Hollow Stem Auger (Diedrich D50) (Pac Drill)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY CAT LOGGED BY CAT REVIEWED BY GTF
2
0
10
20
30
40
11
27
15
12
2.9 110.6
GW
SM
ASPHALT CONCRETE:Approximately 6 inches thick.
BASE:Gray, moist, medium dense, silty sandy GRAVEL; approximately 4 inches thick.
FILL:Dark yellowish brown, moist, loose to medium dense, silty fine SAND with gravel up to 2inches in diameter; cohesionless/hydraulic fill light brown.
Light grayish brown; loose.
Gravel and cobble layer from approximately 7 to 11 feet; rounded clasts approximately 1to 4 inches in diameter.
Loose gravel with no matrix caving into borehole around auger.
No recovery; on gravel/cobbles.
No recovery; on gravel/cobbles.
No recovery; on gravel/cobbles.
Total Depth = 18 feet.Groundwater not encountered during drilling.Backfilled shortly after drilling on 9/02/16.
Note: Groundwater, though not encountered at the time of drilling, may rise to a higherlevel due to seasonal variations in precipitation and several other factors as discussed inthe report.
The ground elevation shown above is an estimation only. It is based on our interpretationsof published maps and other documents reviewed for the purposes of this evaluation. It isnot sufficiently accurate for preparing construction bids and design documents.
BORING LOG
NEW INTAKE/DISCHARGE STRUCTURECARLSBAD SEAWATER DESALINATION PLANT, CARLSBAD, CALIFORNIA
PROJECT NO.
107393003
DATE
11/16
FIGURE
A-3DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 9/02/16 BORING NO.GHD-2
GROUND ELEVATION 11' (MSL)SHEET 1 OF
METHOD OF DRILLING 6" Diameter Hollow Stem Auger (Diedrich D50) (Pac Drill)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY CAT LOGGED BY CAT REVIEWED BY GTF
1
0
10
20
30
40
18
13
6
21.8
10.7
100.7
118.1
GW
SM
SC
SM
ASPHALT CONCRETE:Approximately 2 inches thick.
BASE:Yellowish brown, moist, medium dense, fine to coarse sandy GRAVEL; approximately 6inches thick.
FILL:Light olive, moist, medium dense, silty SAND; scattered gravel up to approximately 2inches thick.Light olive and brown (mottled), moist, medium dense, clayey fine to medium SAND;few fine gravel.
ALLUVIUM:Gray, moist, medium dense, silty fine SAND.
Light brown; wet.
Dark yellowish brown; scattered small lenses of olive gray.
Brown; cohesionless.
Total Depth = 16.5 feet.Groundwater seepage encountered during drilling at approximately 10 feet duringdrilling; no groundwater measured in boring after drilling.Backfilled with approximately 5 cubic feet of bentonite grout and patched with concreteshortly after drilling on 9/02/16.
Note: Groundwater may rise to a level higher than that measured in borehole due toseasonal variations in precipitation and several other factors as discussed in the report.
The ground elevation shown above is an estimation only. It is based on our interpretationsof published maps and other documents reviewed for the purposes of this evaluation. It isnot sufficiently accurate for preparing construction bids and design documents.
BORING LOG
NEW INTAKE/DISCHARGE STRUCTURECARLSBAD SEAWATER DESALINATION PLANT, CARLSBAD, CALIFORNIA
PROJECT NO.
107393003
DATE
11/16
FIGURE
A-4DEPTH (feet)BulkSAMPLESDrivenBLOWS/FOOTMOISTURE (%)DRY DENSITY (PCF)SYMBOLCLASSIFICATIONU.S.C.S.DESCRIPTION/INTERPRETATION
DATE DRILLED 9/02/16 BORING NO.GHD-3
GROUND ELEVATION 10' (MSL)SHEET 1 OF
METHOD OF DRILLING 6" Diameter Hollow Stem Auger (Diedrich D50) (Pac Drill)
DRIVE WEIGHT 140 lbs. (Auto-Trip Hammer)DROP 30"
SAMPLED BY CAT LOGGED BY CAT REVIEWED BY GTF
1
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal Plant OperatorDG-RCFilenameSDF(248).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-01Date and Time11/1/2016 8:25:21 AMMaximum Depth6.89 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(249).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-01ADate and Time11/1/2016 8:41:48 AMMaximum Depth7.87 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(251).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-02Date and Time11/1/2016 9:06:34 AMMaximum Depth22.15 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(252).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-03Date and Time11/1/2016 10:00:59 AMMaximum Depth21.98 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(253).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-04Date and Time11/1/2016 10:24:29 AMMaximum Depth25.26 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(254).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-05Date and Time11/1/2016 10:58:49 AMMaximum Depth21.98 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(255).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-06Date and Time11/1/2016 11:18:31 AMMaximum Depth25.43 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(256).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-07Date and Time11/1/2016 11:46:57 AMMaximum Depth14.27 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(257).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-08Date and Time11/1/2016 12:15:07 PMMaximum Depth41.34 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredPSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(258).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-09Date and Time11/1/2016 1:03:02 PMMaximum Depth14.93 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(259).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-10Date and Time11/1/2016 1:22:08 PMMaximum Depth15.09 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(260).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-11Date and Time11/1/2016 1:39:59 PMMaximum Depth20.51 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(261).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-12Date and Time11/1/2016 2:02:52 PMMaximum Depth24.93 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Ninyo & Moore GeotechnicalProjectPoseidon/Carlsbad Desal PlantOperatorDG-RCFilenameSDF(262).cptJob Number107393003Cone NumberDDG1350GPSHole NumberT-13Date and Time11/1/2016 2:23:52 PMMaximum Depth20.51 ftEST GW Depth During Test20.00 ftNet Area Ratio .8Cone Size 10cm squaredSoil Behavior Referance*Soil behavior type and SPT based on data from UBC-1983 0 5 10 15 20 25 30 35 40 45 0 500 TIPTSF 0 10 FRICTIONTSF 0 10 Fs/Qt% 0 350 SPT N0121 - sensitive fine grained 2 - organic material 3 - clay 4 - silty clay to clay 5 - clayey silt to silty clay 6 - sandy silt to clayey silt 7 - silty sand to sandy silt 8 - sand to silty sand 9 - sand 10 - gravelly sand to sand 11 - very stiff fine grained (*)12 - sand to clayey sand (*) CPT DATADEPTH(ft)SOILBEHAVIORTYPE
Coarse Fine Coarse Medium SILT CLAY
3" 2"¾"½" ⅜"4 8 3050
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 422
107393003 11/16 B-1NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD SEAWATER DESALINATION PLANT
CARLSBAD, CALIFORNIA
Fine
Sample
Location
100
D10
16 200
GRAVEL SAND FINES
Symbol Plasticity
Index
Plastic
Limit
Liquid
Limit
1½" 1"
Depth
(ft)D30 Cu
GHD-1 5.0-6.5 -- -- -- 0.13
USCS
0.22
D60
SP0.38 3.0 1.0 2
Passing
No. 200
(%)
Cc
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00010.0010.010.1110100PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS
U.S. STANDARD SIEVE NUMBERS HYDROMETER
GRADATION TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_SIEVE GHD-1 @ 5.0-6.5.xls
Coarse Fine Coarse Medium SILT CLAY
3" 2"3/4"4 10 30 50 200
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 422
Fine
Sample Location CcCu
1001-1/2" 1"
Depth(ft)
-- -- --
D60Liquid Limit
3/8"
GRAVEL SAND FINES
Symbol PlasticityIndexPlasticLimit D30D10
16
PassingNo. 200
(%)
-- 20 SM
Equivalent USCS
GHD-1 20.0-21.5 37 26 11 --
107393003 11/16 CARLSBAD, CALIFORNIA
NEW INTAKE/DISCHARGE STRUCTURE B-2CARLSBAD SEAWATER DESALINATION PLANT
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00010.0010.010.1110100PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS
U.S. STANDARD SIEVE NUMBERS HYDROMETER
GRADATION TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_SIEVE+HYDRO GHD-1 @ 20.0-21.5.xls
Coarse Fine Coarse Medium SILT CLAY
3" 2"¾"½" ⅜"4 8 3050
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 422
USCS
--
D60
SM-- -- -- 26
Passing
No. 200
(%)
CcCu
GHD-3 15.0-16.5 -- -- -- --
GRAVEL SAND FINES
Symbol Plasticity
Index
Plastic
Limit
Liquid
Limit
1½" 1"
Depth
(ft)D30
Fine
Sample
Location
100
D10
16 200
107393003 11/16 B-3NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD SEAWATER DESALINATION PLANT
CARLSBAD, CALIFORNIA
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.00010.0010.010.1110100PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS
U.S. STANDARD SIEVE NUMBERS HYDROMETER
GRADATION TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_SIEVE GHD-3 @ 15.0-16.5.xls
LOCATION
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 4318
107393003 11/16 B-4
USCS
USCS
(Entire Sample)(Fraction Finer ThanLIMIT, PL INDEX, PI
LIQUID PLASTIC PLASTICITY
LIMIT, LL
No. 40 Sieve)
SYMBOL
20.0-21.0 1137
(FT)
DEPTH
26GHD-1
CLASSIFICATION
SM
ML
NEW INTAKE/DISCHARGE STRUCTURE
Equivalent
CARLSBAD SEAWATER DESALINATION PLANT
CARLSBAD, CALIFORNIA
CH or OH
CL or OL MH or OH
ML or OLCL - ML
0
10
20
30
40
50
60
0 102030405060708090100PLASTICITY INDEX, PI LIQUID LIMIT, LL
ATTERBERG LIMITS TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_ATTERBERG Page 1.xls
X
Description Symbol
Sample
Location
490
Depth
(ft)
Shear
Strength
25.0-25.9Silty SANDSTONE GHD-1 Peak
Cohesion, c
(psf)Friction Angle,
(degrees)Soil Type
Formation32
37
100
Formation
Ultimate25.0-25.9GHD-1
B-5
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 3080
Silty SANDSTONE
107393003 11/16
CARLSBAD SEAWATER DESALINATION PLANT
NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD, CALIFORNIA
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
0 1000 2000 3000 4000 5000 6000 7000 8000 9000SHEAR STRESS (PSF)NORMAL STRESS (PSF)
DIRECT SHEAR TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_DIRECT SHEAR GHD-1 @ 25.0-25.9.xls
X
Description Symbol
Sample
Location
140
Depth
(ft)
Shear
Strength
5.0-6.5Silty SAND GHD-3 Peak
Cohesion, c
(psf)Friction Angle,
(degrees)Soil Type
SM35
35
50
SM
Ultimate5.0-6.5GHD-3
B-6
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 3080
Silty SAND
107393003 11/16
CARLSBAD SEAWATER DESALINATION PLANT
NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD, CALIFORNIA
0
1000
2000
3000
4000
5000
0 1000 2000 3000 4000 5000SHEAR STRESS (PSF)NORMAL STRESS (PSF)
DIRECT SHEAR TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_DIRECT SHEAR GHD-3 @ 5.0-6.5.xls
X
Description Symbol
Sample
Location
80
Depth
(ft)
Shear
Strength
15.0-16.5Silty SAND GHD-3 Peak
Cohesion, c
(psf)Friction Angle,
(degrees)Soil Type
SM23
26
80
SM
Ultimate15.0-16.5GHD-3
B-7
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 3080
Silty SAND
107393003 11/16
CARLSBAD SEAWATER DESALINATION PLANT
NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD, CALIFORNIA
0
1000
2000
3000
4000
5000
6000
7000
0 1000 2000 3000 4000 5000 6000 7000SHEAR STRESS (PSF)NORMAL STRESS (PSF)
DIRECT SHEAR TEST RESULTS
PROJECT NO.DATE
FIGURE
107393003_DIRECT SHEAR GHD-3 @ 15.0-16.5.xls
1 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 643
2 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 417
3 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 422
920 0.092
580 0.058
11/16 B-8NEW INTAKE/DISCHARGE STRUCTURE
CARLSBAD SEAWATER DESALINATION PLANT
CARLSBAD, CALIFORNIA
GHD-1 40.0-45.0 6.9
6.7
CHLORIDE
CONTENT 3
(ppm)pH 1SAMPLE DEPTH (FT)SAMPLE LOCATION (Ohm-cm)
RESISTIVITY 1 SULFATE CONTENT 2
(%)(ppm)
GHD-2 1.0-4.0 1,200
2,640
90
190
107393003
CORROSIVITY TEST RESULTS
PROJECT NO. DATE
FIGURE
107393003_CORROSIVITY Page 1.xls
New Intake/Discharge Structure November 30, 2016 Carlsbad Seawater Desalination Plant, Carlsbad, California Project No. 107393003
107393003 R.doc
APPENDIX D
PREVIOUS SITE LABORATORY TESTING
(GEOLOGIC ASSOCIATES, 2008)
Carlsbad Seawater Desalination Plant (Intake Pump Station Site) August 20, 2013 4600 Carlsbad Boulevard, Carlsbad, California Project No. 107383002
107383002 R Intake Pump Station rev.doc
APPENDIX C
NINYO & MOORE LABORATORY TESTING
Classification
Soils were visually and texturally classified in accordance with the Unified Soil Classification System (USCS) in general accordance with ASTM D 2488. Soil classifications are indicated on the logs of the exploratory borings in Appendix A.
In-Place Moisture and Density Tests The moisture content and dry density of relatively undisturbed samples obtained from the ex-
ploratory borings were evaluated in general accordance with ASTM D 2937. The test results are presented on the logs of the exploratory borings in Appendix A.
Gradation Analysis Gradation analysis tests were performed on selected representative soil samples in general accor-
dance with ASTM D 422. The grain-size distribution curves are shown on Figures C-1 through C-10.
These test results were utilized in evaluating the soil classifications in accordance with USCS.
Expansion Index Tests The expansion index of a selected material was evaluated in general accordance with ASTM D 4829. The specimen was molded under a specified compactive energy at approximately
50 percent saturation. The prepared 1-inch thick by 4-inch diameter specimen was loaded with a
surcharge of 144 psf and was inundated with tap water. Readings of volumetric swell were made for a period of 24 hours. The results are presented on Figure C-11.
Soil Corrosivity Tests Soil pH, and resistivity tests were performed on a representative sample in general accordance with
CT 643. The soluble sulfate and chloride content of the selected sample was evaluated in general
accordance with CT 417 and CT 422, respectively. The test results are presented on Figure C-12.
R-Value The resistance value, or R-value, for site soils was evaluated in general accordance with Califor-nia Test (CT) 301. A samples was prepared and evaluated for exudation pressure and expansion
pressure. The equilibrium R-value is reported as the lesser or more conservative of the two calcu-
lated results. The test results are shown on Figure C-13.
Appendix C. Geotechnical
Boring Logs – Current
Investigation
Figure
Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2
Carlsbad, CA
Boring Legend
BLOWS/FOOT*
* NUMBER OF BLOWS OF 140 LB HAMMER FALLING 30 INCHES TO DRIVE A 2 INCH O.D. (1-3/8 INCH I.D.) SPLIT-BARRELSAMPLER THE LAST 12 INCHES OF AN 18-INCH DRIVE (ASTM-1586 STANDARD PENETRATION TEST).
BOULDERS
UNC. COMP.
STRENGTH (TSF)
COBBLES
GRAVEL
RELATIVE DENSITYFINE-GRAINED SOILS>50% PASSESNO. 200 SIEVECONSISTENCY
SAND
MEDIUM
PENETRATION RESISTANCE
FINE
VERY LOOSE
LOOSE
MEDIUM DENSE
DENSE
VERY DENSE
STABILIZED WATER LEVEL
MEASUREMENT(WITH DATE)
INITIAL WATER LEVEL
MEASUREMENT(WITH DATE)COARSE-GRAINED SOILS>50% RETAINED ONNO. 200 SIEVEPEAT
ORGANIC
ORGANIC
GW
GP
GM
GC
SW
SP
SM
SC
CL
ML
OL
CH
MH
OH
PT
CLEAN GRAVELS
<5% FINES
PRIMARILY ORGANIC MATTER, DARK IN COLOR, AND ORGANIC ODOR
SOIL GROUP NAMES & LEGEND
OTHER SYMBOLS
WELL-GRADED GRAVEL
POORLY-GRADED GRAVEL
SILTY GRAVEL
CLAYEY GRAVEL
WELL-GRADED SAND
POORLY-GRADED SAND
SILTY SAND
CLAYEY SAND
LEAN CLAY
SILT
ORGANIC CLAY OR SILT
FAT CLAY
ELASTIC SILT
ORGANIC CLAY OR SILT
COMPONENTPERCENTAGE
FINE
SILTS ANDCLAYS
CRITERIA FOR ASSIGNING SOIL GROUP NAMES GROUPSYMBOL
SANDS
>50% OF COARSEFRACTION PASSESNO 4. SIEVE
UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D-2487)
1040200
WELL
Concrete Grout/Fill
Bentonite/Grout Seal
Sand Pack + Solid Pipe
Sand Pack + Slotted Pipe
GRAIN SIZES
MATERIALS
Asphalt
Aggregate Base
Boulders & Cobbles
Fill
Topsoil
MATERIALTYPES
HIGHLY ORGANIC SOILS
INCREASING VISUALMOISTURE CONTENT
COARSECOARSE
CLEAN SANDS
<5% FINES
GRAVELS WITH FINES
>12% FINES
INORGANIC
BLOWS/FOOT (N60)
SILTS AND CLAYS
LIQUID LIMIT<50
SILTS AND CLAYS
LIQUID LIMIT>50
INORGANIC
SANDS AND FINES
>12% FINES
Cu 4 AND 1 Cc 3
Cu < 4 AND/OR 1 > Cc > 3
FINES CLASSIFY AS ML OR MH
FINES CLASSIFY AS CL OR CH
Cu 6 AND 1 Cc 3
Cu < 6 AND/OR 1 > Cc > 3
FINES CLASSIFY AS ML OR MH
FINES CLASSIFY AS CL OR CH
PI>7 AND PLOTS>"A" LINE
PI>4 AND PLOTS<"A" LINE
LL (oven dried)/LL (not dried)<0.75
PI PLOTS >"A" LINE
PI PLOTS <"A" LINE
LL (oven dried)/LL (not dried)<0.75
SILT & CLAY
U.S.STANDARDSIEVE 12"3"3/4"
GRAVELS
>50% OF COARSEFRACTION RETAINEDON NO 4. SIEVE
SAND & GRAVEL
4
0 - 4
5 - 10
11 - 30
31 - 50
OVER 50
0 - 1
2 - 4
5 - 8
9 - 15
16 - 30
OVER 30
NOTES
VERY SOFT
SOFT
MEDIUM STIFF
STIFF
VERY STIFF
HARD
0 - 1/4
1/4 - 1/2
1/2 - 1
1 - 2
2 - 4
OVER 4
WETMOISTDRY
MOSTLY
SOMELITTLE
FEW
TRACE
>50%
30 - 50%15 - 29%
5 - 14%
<5%
bgs
c
CD
CN
CR
CU
DS
EI
HY
MD
N60
PI
PR
RV
SA
SE
TC
TR
UC
UU
BELOW GROUND SURFACE
COHESION
CONSOLIDATED DRAINED TRIAXIAL
CONSOLIDATION
CORROSIVITY
CONSOLIDATED UNDRAINED TRIAXIAL
DIRECT SHEAR
EXPANSION INDEX
HYDROMETER
MAX DENSITY (COMPACTION)
BLOW COUNT, Corrected for Hammer Energy Only
PLASTICITY INDEX
PERMEABILITY
R-VALUE
SIEVE ANALYSIS
SAND EQUIVALENT
CYCLIC TRIAXIAL
TIME RATE OF CONSOLIDATION
UNCONFINED COMPRESSION
UNCONSOLIDATED UNDRAINED TRIAXIAL
SAMPLERS
SPT (2" OD)
Modified California (3" OD)
California (2.5" OD)
Bulk
Shelby Tube
HQ Core
Sonic Core
0 10 20 30 40 50 60 70 80 90 100 110 120
0
10
20
30
40
50
60
70
80
PLASTICITY INDEX (%)7
4
PLASTICITY CHART
LIQUID LIMIT (%)LEGEND 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/22/21MH & OH"U" LINE
PI = 0.9(
L
L
-
8)
PI = 0
.
7
3
(
L
L
-
2
0
)"A" LIN
E
ML & OL
CH & OH
CL-ML
CL & OL
20
28
24.5 feet measured tomudline from barge deck at07:45
24.2 feet to mudline at 08:55
24.1 feet to mudline at 09:45
24.1 feet to mudline at 10:55
4250/4"
3350/3"
3550/5"
50/2"
5.0
19.0
21.1
Clayey SAND (SC); wet; Estimated soil type, notsampled due to drilling method and boreholeestablishment.
SANDSTONE; Santiago Formation, recovered asSilty Sand (SM), very dense, olive gray, wet, fineSAND
few orange rock fragments
BIT DIAMETER:8"
DATE: START 4/3/21 END 4/3/21
DATE:
DRILL METHOD:HSA
LOGGED BY:MG
TIME:
DEPTH:-24.5 ft
BOREHOLE DEPTH (ft):45.5
LATITUDE:33.13888 ELEVATION (ft):-19
CHECKED BY (DATE):
STATION & OFFSET:NA, NA
DEPTH:
X
GROUNDWATER DATA:
NOT ENCOUNTERED
DRILLING COMPANY:Pacific Drilling
HAMMER EFFICIENCY:89.6%
EFFICIENCY MEASURED GW NOT MEASURED
TIME:
DATE:
DRILL RIG:Diedrich D50
CASING TIP DEPTH:NA
HAMMER TYPE:Automatic
LONGITUDE:-117.33814
% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-001
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
0
5
10
15
20
25
-20
-25
-30
-35
-40
-45
22
24.4 feet to mudline at 12:00
24.9 feet to mudline at 13:25
25.1 feet to mudline at 15:10
50/5"
50/4"
1650/6"
50/3"
109
107
19.9
21.8 larger rock fragments up to 3 inches in diameter
Boring terminated at 45.5 feet below mudline% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-001
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
30
35
40
45
-50
-55
-60
34 18.2 feet measured tomudline from barge deck at06:55
17.2 feet to mudline at 08:15
16.6 feet to mudline at 09:15
6 9 6
3350/2"
2250/6"
50/5"
2850/3"
2550/5"
109
106
123
22.5
19.0
21.4
12.6
Clayey SAND (SC); medium dense; gray tobrownish gray; wet; medium to fine SAND; fewcoarse GRAVEL, few seashells
SANDSTONE; Santiago Formation, recovered asSilty Sand (SM), very dense, gray, wet, fineSAND
medium to fine SAND
fine SAND, increased fines
few rock fragments
BIT DIAMETER:8"
DATE: START 4/5/21 END 4/5/21
DATE:
DRILL METHOD:HSA
LOGGED BY:MG
TIME:
DEPTH:-15.0 ft
BOREHOLE DEPTH (ft):75.5
LATITUDE:33.13887 ELEVATION (ft):-10
CHECKED BY (DATE):
STATION & OFFSET:NA, NA
DEPTH:
X
GROUNDWATER DATA:
NOT ENCOUNTERED
DRILLING COMPANY:Pacific Drilling
HAMMER EFFICIENCY:89.6%
EFFICIENCY MEASURED GW NOT MEASURED
TIME:
DATE:
DRILL RIG:Diedrich D50
CASING TIP DEPTH:NA
HAMMER TYPE:Automatic
LONGITUDE:-117.33788
% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-002
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
0
5
10
15
20
25
-15
-20
-25
-30
-35
46
14
15.7 feet to mudline at 10:10
15.1 feet to mudline at 11:10
14.6 feet to mudline at 12:20
14.5 feet to mudline at 13:25
50/1"
50/4"
50/5"
50/6"
3750/4"
50/6"
113
115
16.4
14.6
decreased fines% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-002
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
30
35
40
45
50
55
-40
-45
-50
-55
-60
-65
17
14.8 feet to mudline at 14:15
15.2 feet to mudline at 15:20
16 feet to mudline at 16:10
50/5"
50/4"
50/4"
50/6"105 22.2
medium to fine SAND
Boring terminated at 75.5 feet below mudline% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-002
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
60
65
70
75
-70
-75
-80
-85
7
25.7 feet measured tomudline from barge deck at13:45
no sample recovery
26 feet to mudline at 14:53
21022
4 4 4
92127
101720
102 23.7
Silty, clayey SAND (SC-SM); Estimated soil type,not sampled due to drilling method and boreholeestablishment.
Poorly-graded SAND with SILT (SP-SM);medium dense; gray; wet; medium to fine SAND;few fines
dense; fine SAND
trace shells in sampler
BIT DIAMETER:8"
DATE: START 4/2/21 END 4/2/21
DATE:
DRILL METHOD:HSA
LOGGED BY:MG
TIME:
DEPTH:-26.0 ft
BOREHOLE DEPTH (ft):45.5
LATITUDE:33.14055 ELEVATION (ft):-18
CHECKED BY (DATE):
STATION & OFFSET:NA, NA
DEPTH:
X
GROUNDWATER DATA:
NOT ENCOUNTERED
DRILLING COMPANY:Pacific Drilling
HAMMER EFFICIENCY:89.6%
EFFICIENCY MEASURED GW NOT MEASURED
TIME:
DATE:
DRILL RIG:Diedrich D50
CASING TIP DEPTH:NA
HAMMER TYPE:Automatic
LONGITUDE:-117.33855
% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-003
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
0
5
10
15
20
25
-20
-25
-30
-35
-40
-45
31
17
slow drilling, 26.1 feet tomudline at 15:45
26 feet to mudline at 16:45
50/6"
4050/3"
50/4"
50/6"
103
110
25.0
20.1
17.7
SANDSTONE; Santiago Formation, recovered as
Silty Sand (SM), very dense, olive gray, wet, fineSAND
decreased fines
Boring terminated at 45.5 feet below mudline% FINESDEPTH (ft)ELEVATION (ft)Boring Log
REMARKS
SAMPLERSAMPLE NO./CORE RUNFIELD BLOWS/6 inPOCKET PEN (ksf)DRY DENSITY (pcf)MOISTURECONTENT (%)OTHER TESTSMATERIALGRAPHICBoring
A-21-003
DESCRIPTION
HDR BORING LOG IRVINE 2021-08 POSEIDON AGUA HEDIONDA LAGOON.GPJ FOLSOM 3-30-11.GDT 4/29/21Date
APR 2021
Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Carlsbad, CA
30
35
40
45
-50
-55
-60
Appendix D. Geophysical
Investigation
Page | 1
6280 Riverdale Street San Diego, CA 92120 (877) 215-4321 | oneatlas.com
April 20, 2021 Atlas No. 121139SWG Report No. 1 MR. GARY GOLDMAN, PE, GE HDR, INC. 350 SOUTH GRAND AVENUE, SUITE 29 LOS ANGELES, CALIFORNIA 90071 Subject: Geophysical Evaluation Carlsbad Boulevard Poseidon ReMi Study Carlsbad, California
Dear Mr. Goldman:
In accordance with your authorization, Atlas Technical Consultants has performed a geophysical
evaluation pertaining to the Carlsbad Boulevard Poseidon ReMi Study project located at
4600 Carlsbad Boulevard in Carlsbad, California (Figure 1). The purpose of our study was to
develop two one-dimensional (1-D) shear-wave velocity profiles to be used for design and
construction at the project site. Our services were conducted on April 9th, 2021. This report
presents the survey methodology, equipment used, analysis, and findings from our study.
Our scope of services for the project included the performance of two refraction microtremor
(ReMi) profiles (RL-1 and RL-2) at designated areas of the project site (Figure 2). The ReMi
technique uses recorded surface waves (specifically Rayleigh waves) that are contained in
background noise to develop a 1-D shear-wave velocity sounding of the study area down to a
depth, in this case, of approximately 100 feet below ground surface (bgs). The depth of exploration
is dependent on the length of the line and the frequency content of the background noise. The
results of the ReMi method are displayed as a 1-D profile which represents the average condition
across the length of the line. The ReMi method does not require an increase of material velocity
with depth; therefore, low velocity zones (velocity inversions) are detectable with the ReMi
method.
Our ReMi evaluation included the use of a 24-channel Geometrics Geode seismograph and 24,
4.5-Hz vertical component geophones. The geophones were spaced 10 feet apart for a total line
length of 230 feet for RL-1 and RL-2. A total of 15 records, 32 seconds in duration for each line,
were recorded and then downloaded to a field computer. The data was later processed using
Surface Plus 9.1 - Advanced Surface Wave Processing Software (Geogiga Technology Corp.,
2020), which uses the refraction microtremor method (Louie, 2001), and other surface wave
analysis methods. The program generates phase-velocity dispersion curves for each record and
provides an interactive dispersion modeling tool where the users determine the best fitting model.
Atlas No. 121139SWG Report No. 1 Page | 2
The result is a 1-D shear-wave velocity model of the site with roughly 85 to 95 percent accuracy.
Figure 2 depicts the general line location and site conditions in the study area.
Table 1 and Figures 3a and 3b present the results from our evaluation. Based on our analysis of
the collected data, the average characteristic site shear-wave velocity down to a depth of 100 feet
below ground surface is 988 feet per second at location RL-1 and 1062 feet per second at location
RL-2 (IBC, 2018). This value corresponds to IBC seismic Site Class `D`. It should be noted the
ReMi results represent the average condition across the length of the line.
Table 1 – ReMi Results
Line No. Depth (feet) Shear Wave Velocity (feet/second)
RL-1 (N-S)
0 – 10.6 550.5
10.6 – 20.31 674.2
20.31 – 31.48 899
31.48 – 44.91 946.4
44.91 – 61.66 1261.2
61.66 – 81.76 1247.4
81.76 – 106.41 1583.6
106.41 – 133.68 1602.7
133.68 – 150 2174.5
RL-2 (NE-SW)
0 – 10.28 537.6
10.28 – 19.51 667.3
19.51 – 27.61 913
27.61 – 33.15 999.7
33.15 – 62.39 1252
62.39 – 71.63 1272
71.63 – 89.03 1569
89.03 – 131.8 2144
131.8 – 150 2213
The field evaluation and geophysical analyses presented in this report have been conducted in
general accordance with current practice and the standard of care exercised by consultants
performing similar tasks in the project area. No warranty, express or implied, is made regarding
the conclusions and opinions presented in this report. There is no evaluation detailed enough to
reveal every subsurface condition. Variations may exist and conditions not observed or described
in this report may be present. Uncertainties relative to subsurface conditions can be reduced
through additional subsurface exploration. Additional subsurface evaluating will be performed
upon request.
Atlas No. 121139SWG Report No. 1 Page | 3
This document is intended to be used only in its entirety. No portions of the document, by itself,
is designed to completely represent any aspect of the project described herein. Atlas should be
contacted if the reader requires additional information or has questions regarding the content,
interpretations presented, or completeness of this document. This report is intended exclusively
for use by the client. Any use of or reuse of the findings, conclusions, and/or recommendations of
this report by parties other than the client is undertaken at said parties’ sole risk.
We appreciate the opportunity to be of service on this project. Should you have questions related
to this report, please contact the undersigned at your convenience.
Respectfully submitted, Atlas Technical Consultants, LLC
Evan C. Anderson Patrick F. Lehrmann, P.G., P.Gp.
Senior Staff Geophysicist Principal Geologist/Geophysicist
ECA:pfl:ds
Attachments: Figure 1 – Site Location Map Figure 2 – Seismic Line Location Map Figure 3a – ReMi Results, RL-1 Figure 3b – ReMi Results, RL-2
Distribution: Mr. Gary Goldman at gary.goldman@HDRinc.com
Figure 2SEISMIC LINE LOCATIONMAPCarlsbad Boulevard Poseidon ReMi StudyCarlsbad, CaliforniaProject No.: 121139SWGDate: 04/21approximate scale in feet751500225300C ar lsb ad B o u le v ar dRL-2View to the southwestR L -1 RL-2RL-1View to the northReMi LineLEGENDRL-2
Appendix E. Laboratory Test
Results – Current
Investigation
TABLE E-1SUMMARY OF SOIL LABORATORY DATA Project: Carlsbad Seawater Desalination Plant (CDP) Intake Phase 2Project No.: 10295144PeakGravel (%)Sand (%)Fines (%) Max. Dry Density (pcf)OptimumMoisture Content (%) LL PL PI' (deg)c' (psf)' (deg)c' (psf)Undrained Shear Strength (ksf)Swell (+) or Collapse (-) (%)Swell or Collapse Pressure (ksf)pHResistivity (-cm)Sulfate (ppm)Chloride (ppm)A-21-00110.0 SM -31 19.0 0 80 207.1 96 532 3772A-21-001 15.0 SM -36 21.1 2 70 28 NP NP NPA-21-001 30.0 SM -51 20.3 109A-21-001 35.0 SM -568.5 81 598 5138A-21-001 40.0 SM -61 21.8 107 0 78 22A-21-0020.0 SC -14 22.5 1 65 34 29 18 11A-21-002 5.0 SM -19 20.5 109 42 250 34 100A-21-002 15.0 SM -29 21.4 106 41 200 35 50A-21-002 20.0 SM -348.3 115 463 3140A-21-002 25.0 SM -39 12.6 123A-21-002 30.0 SM -44 3 51 46A-21-002 40.0 SM -54 0 86 14A-21-002 45.0 ML -59 16.4 113A-21-002 55.0 ML -69 14.6 115 38 200 33 50A-21-002 65.0 SM -79 0 83 17A-21-002 75.0 SM -89 22.2 105A-21-00315.0 SP-SM -38 1 92 7A-21-003 20.0 SM -43 23.7 102 36 150 32 100A-21-003 30.0 SM -53 25.0 1037.6 84 401 6107A-21-003 35.0 SM -58 20.1 0 69 31 NP NP NPA-21-003 40.0 SM -63 17.7 110A-21-003 45.0 SM -68 0 83 17The laboratory tests were performed in general accordance with the following standards: Corrosivity Tests - DOT CA 532/643 - pH, DOT CA 417 - soluble sulfates, DOT CA 422 - chlorides, DOT CA 643 - minimum resistivity Unconsolidated Undrained Triaxial Test - ASTM Test Method D2850Direct Shear Test - ASTM Test Method D3080Atterberg Limits Test - ASTM Test Method D4318Dry Density Test - ASTM Test Method D2937Moisture Content Test - ASTM Test Method D2216No. 200 Wash Test - ASTM Test Method D1140Compaction Test - ASTM Test Method D1557Resistance R-Value and Expansion Pressure - Cal Test 301 Grain Size Analysis and Hydrometer - ASTM Test Method D422 One-Dimensional Consolidation Test - ASTM Test Method D2435Dry Density (pcf)Gradation Compaction Atterberg LimitsDirect Shear Strength UltimateSoil Type(USCS)Sample Depth (ft)Boring No.Sample Elev. (ft)Moisture Content (%)UU Triaxial ConsolidationR- ValueCorrosion AnalysesExpansion IndexSand Equivalent
GRAIN SIZE DISTRIBUTION CURVE
ASTM D 6913
Client Name: HDR Tested by: SM Date: 04/15/21
Project Name: Poseidon - CDP Intake Computed by: NR Date: 04/19/21
Project No.: 10295144 Checked by: AP Date: 04/21/21
Gravel Sand Silt & Clay
A-21-001 1 10 0 80 20 SM
A-21-001 2 15 2 70 28 SM
A-21-001 7 40 0 78 22 SM
Symbol Boring No. Sample
No.
Sample
Depth
(feet)
Percent Soil Type
U.S.C.S
Atterberg Limits
LL:PL:PI
N/A
N/P
N/A
0
10
20
30
40
50
60
70
80
90
100
0.0010.010.1110100PERCENT PASSING BY WEIGHTPARTICLE SIZE (mm)
HYDROMETERSIEVE NUMBERSIEVE OPENING
SAND SILT OR CLAYGRAVEL
COARSE FINE COARSE MEDIUM FINE
GRAIN SIZE DISTRIBUTION CURVE
ASTM D 6913
Client Name: HDR Tested by: JT Date: 04/14/21
Project Name: Poseidon - CDP Intake Computed by: NR Date: 04/19/21
Project No.: 10295144 Checked by: AP Date: 04/21/21
Gravel Sand Silt & Clay
A-21-002 0 0 1 65 34 SC
A-21-002 6 30 3 51 46 SM
A-21-002 8 40 0 86 14 SM
Symbol Boring No. Sample
No.
Sample
Depth
(feet)
Percent Soil Type
U.S.C.S
Atterberg Limits
LL:PL:PI
29:18:11
N/A
N/A
0
10
20
30
40
50
60
70
80
90
100
0.0010.010.1110100PERCENT PASSING BY WEIGHTPARTICLE SIZE (mm)
HYDROMETERSIEVE NUMBERSIEVE OPENING
SAND SILT OR CLAYGRAVEL
COARSE FINE COARSE MEDIUM FINE
GRAIN SIZE DISTRIBUTION CURVE
ASTM D 6913
Client Name: HDR Tested by: JT Date: 04/14/21
Project Name: Poseidon - CDP Intake Computed by: NR Date: 04/19/21
Project No.: 10295144 Checked by: AP Date: 04/21/21
Gravel Sand Silt & Clay
A-21-002 13 65 0 83 17 SM
Soil Type
U.S.C.S
Atterberg Limits
LL:PL:PI
N/A
Symbol Boring No. Sample
No.
Sample
Depth
(feet)
Percent
0
10
20
30
40
50
60
70
80
90
100
0.0010.010.1110100PERCENT PASSING BY WEIGHTPARTICLE SIZE (mm)
HYDROMETERSIEVE NUMBERSIEVE OPENING
SAND SILT OR CLAYGRAVEL
COARSE FINE COARSE MEDIUM FINE
GRAIN SIZE DISTRIBUTION CURVE
ASTM D 6913
Client Name: HDR Tested by: SM Date: 04/15/21
Project Name: Poseidon - CDP Intake Computed by: NR Date: 04/19/21
Project No.: 10295144 Checked by: AP Date: 04/21/21
Gravel Sand Silt & Clay
A-21-003 2 15 1 92 7 SP-SM
A-21-003 6 35 0 69 31 SM
A-21-003 8 45 0 83 17 SM
Symbol Boring No. Sample
No.
Sample
Depth
(feet)
Percent Soil Type
U.S.C.S
Atterberg Limits
LL:PL:PI
N/A
N/P
N/A
0
10
20
30
40
50
60
70
80
90
100
0.0010.010.1110100PERCENT PASSING BY WEIGHTPARTICLE SIZE (mm)
HYDROMETERSIEVE NUMBERSIEVE OPENING
SAND SILT OR CLAYGRAVEL
COARSE FINE COARSE MEDIUM FINE
Client Name:HDR Tested By: DK Date: 04/13/21
Project Name:Poseidon - CDP Intake Computed By: NR Date: 04/19/21
Project No.:10295144 Checked By: AP Date: 04/21/21
PROCEDURE USED
Wet Preparation
X Dry Preparation
X Procedure A
Multipoint Test
Procedure B
One-point Test
Symbol Boring
Number
Sample
Number
Depth
(feet)LL PL PI
Plasticity
Chart
Symbol
A-21-001 2 15 NP NP NP
* NP denotes "non-plastic"
ATTERBERG LIMITS
ASTM D 4318
CL-ML
CL
ML or OL
CH or OH
MH or OH
0
10
20
30
40
50
60
0 102030405060708090100PLASTICITY INDEX (PI)LIQUID LIMIT (LL)
30
35
40
45
50
10 100Moisture Content (%)Number of Blows
25
Client Name:HDR Tested By: DK Date: 04/13/21
Project Name:Poseidon - CDP Intake Computed By: NR Date: 04/19/21
Project No.:10295144 Checked By: AP Date: 04/21/21
PROCEDURE USED
Wet Preparation
X Dry Preparation
X Procedure A
Multipoint Test
Procedure B
One-point Test
Symbol Boring
Number
Sample
Number
Depth
(feet)LL PL PI
Plasticity
Chart
Symbol
♦A-21-002 0 0 29 18 11 CL
ATTERBERG LIMITS
ASTM D 4318
CL-ML
CL
ML or OL
CH or OH
MH or OH
0
10
20
30
40
50
60
0 102030405060708090100PLASTICITY INDEX (PI)LIQUID LIMIT (LL)
20
25
30
35
40
10 100Moisture Content (%)Number of Blows
25
Client Name:HDR Tested By: DK Date: 04/13/21
Project Name:Poseidon - CDP Intake Computed By: NR Date: 04/19/21
Project No.:10295144 Checked By: AP Date: 04/21/21
PROCEDURE USED
Wet Preparation
X Dry Preparation
X Procedure A
Multipoint Test
Procedure B
One-point Test
Symbol Boring
Number
Sample
Number
Depth
(feet)LL PL PI
Plasticity
Chart
Symbol
A-21-003 6 35 NP NP NP
* NP denotes "non-plastic"
ATTERBERG LIMITS
ASTM D 4318
CL-ML
CL
ML or OL
CH or OH
MH or OH
0
10
20
30
40
50
60
0 102030405060708090100PLASTICITY INDEX (PI)LIQUID LIMIT (LL)
20
25
30
35
40
10 100Moisture Content (%)Number of Blows
25
Client:HDR Tested By:ST Date:04/16/21
Project Name:Poseidon ‐ CDP Intake Computed By:NR Date:04/19/21
Project No.:10295144 Checked by:AP Date:04/21/21
Boring No.:A‐21‐001
Sample No.:5 Depth (ft):30
Sample Type:Mod. Cal.
Soil Description:Silty Sand
Test Condition:Inundated Shear Type:Regular
Wet
Unit Weight
(pcf)
Dry
Unit Weight
(pcf)
Initial
Moisture
Content (%)
Final
Moisture
Content (%)
Initial Degree
Saturation
(%)
Final Degree
Saturation
(%)
Normal
Stress
(ksf)
Peak
Shear
Stress (ksf)
Ultimate
Shear
Stress (ksf)
2 1.524 1.308
6 4.098 3.564100
DIRECT SHEAR TEST RESULTS
ASTM D 3080
130.5 108.9 19.9 20.3 98
0
1
2
3
4
5
6
0 0.1 0.2 0.3Shear Stress (ksf)Shear Deformation (Inches)
2 ksf 6 ksf
0
1
2
3
4
5
6
7
01234567891011121314Shear Stress (ksf)Normal Stress (ksf)
Peak Ultimate
Normal Stress:
Client:HDR Tested By:LS Date:04/15/21
Project Name:Poseidon ‐ CDP Intake Computed By:NR Date:04/19/21
Project No.:10295144 Checked by:AP Date:04/21/21
Boring No.:A‐21‐002
Sample No.:1 Depth (ft):5
Sample Type:Mod. Cal.
Soil Description:Silty Sand
Test Condition:Inundated Shear Type:Regular
Wet
Unit Weight
(pcf)
Dry
Unit Weight
(pcf)
Initial
Moisture
Content (%)
Final
Moisture
Content (%)
Initial Degree
Saturation
(%)
Final Degree
Saturation
(%)
Normal
Stress
(ksf)
Peak
Shear
Stress (ksf)
Ultimate
Shear
Stress (ksf)
0.5 0.690 0.444
1 1.212 0.804
2 2.052 1.476
100
DIRECT SHEAR TEST RESULTS
ASTM D 3080
129.4 108.7 19.0 20.5 93
0
1
2
3
0 0.1 0.2 0.3Shear Stress (ksf)Shear Deformation (Inches)
0.5 ksf 1 ksf 2 ksf
0
1
2
3
4
012345678Shear Stress (ksf)Normal Stress (ksf)
Peak: C=250 psf; ɸ=42°
Ultimate: C=100 psf; ɸ=34°
Normal Stress:
Client:HDR Tested By:LS Date:04/15/21
Project Name:Poseidon ‐ CDP Intake Computed By:NR Date:04/19/21
Project No.:10295144 Checked by:AP Date:04/21/21
Boring No.:A‐21‐002
Sample No.:3 Depth (ft):15
Sample Type:Mod. Cal.
Soil Description:Silty Sand
Test Condition:Inundated Shear Type:Regular
Wet
Unit Weight
(pcf)
Dry
Unit Weight
(pcf)
Initial
Moisture
Content (%)
Final
Moisture
Content (%)
Initial Degree
Saturation
(%)
Final Degree
Saturation
(%)
Normal
Stress
(ksf)
Peak
Shear
Stress (ksf)
Ultimate
Shear
Stress (ksf)
1 1.103 0.756
2 2.028 1.427
4 3.744 2.953
99
DIRECT SHEAR TEST RESULTS
ASTM D 3080
127.2 104.8 21.4 22.4 95
0
1
2
3
4
5
0 0.1 0.2 0.3Shear Stress (ksf)Shear Deformation (Inches)
1 ksf 2 ksf 4 ksf
0
1
2
3
4
5
6
0123456789101112Shear Stress (ksf)Normal Stress (ksf)
Peak: C=200 psf; ɸ=41°
Ultimate: C=50 psf; ɸ=35°
Normal Stress:
Client:HDR Tested By:LS Date:04/14/21
Project Name:Poseidon ‐ CDP Intake Computed By:NR Date:04/19/21
Project No.:10295144 Checked by:AP Date:04/21/21
Boring No.:A‐21‐002
Sample No.:11 Depth (ft):55
Sample Type:Mod. Cal.
Soil Description:Silty Sand
Test Condition:Inundated Shear Type:Regular
Wet
Unit Weight
(pcf)
Dry
Unit Weight
(pcf)
Initial
Moisture
Content (%)
Final
Moisture
Content (%)
Initial Degree
Saturation
(%)
Final Degree
Saturation
(%)
Normal
Stress
(ksf)
Peak
Shear
Stress (ksf)
Ultimate
Shear
Stress (ksf)
4 3.397 2.696
8 6.507 5.287
10 8.184 6.648
85 99
DIRECT SHEAR TEST RESULTS
ASTM D 3080
132.1 115.3 14.6 16.9
0
2
4
6
8
10
0 0.1 0.2 0.3Shear Stress (ksf)Shear Deformation (Inches)
4 ksf 8 ksf 10 ksf
0
2
4
6
8
10
02468101214161820Shear Stress (ksf)Normal Stress (ksf)
Peak: C=200 psf; ɸ=38°
Ultimate: C=50 psf; ɸ=33°
Normal Stress:
Client:HDR Tested By:LS Date:04/15/21
Project Name:Poseidon ‐ CDP Intake Computed By:NR Date:04/19/21
Project No.:10295144 Checked by:AP Date:04/21/21
Boring No.:A‐21‐003
Sample No.:3 Depth (ft):20
Sample Type:Mod. Cal.
Soil Description:Silty Sand
Test Condition:Inundated Shear Type:Regular
Wet
Unit Weight
(pcf)
Dry
Unit Weight
(pcf)
Initial
Moisture
Content (%)
Final
Moisture
Content (%)
Initial Degree
Saturation
(%)
Final Degree
Saturation
(%)
Normal
Stress
(ksf)
Peak
Shear
Stress (ksf)
Ultimate
Shear
Stress (ksf)
1 0.912 0.720
2 1.728 1.356
4 3.108 2.628
100
DIRECT SHEAR TEST RESULTS
ASTM D 3080
125.6 101.6 23.7 24.4 97
0
1
2
3
4
0 0.1 0.2 0.3Shear Stress (ksf)Shear Deformation (Inches)
1 ksf 2 ksf 4 ksf
0
1
2
3
4
012345678Shear Stress (ksf)Normal Stress (ksf)
Peak: C=150 psf; ɸ=36°
Ultimate: C=100 psf; ɸ=32°
Normal Stress:
CORROSION TEST RESULTS
Client Name: HDR AP Job No.: 21-0418
Project Name: Poseidon - CDP Intake Date:04/14/21
Project No.: 10295144
Boring Sample Depth Soil pH Sulfate Content Chloride Content
No. No. (feet) Description (ppm)(ppm)
A-21-001 1 10 Silty Sand 7.1 532 3772
A-21-001 6 35 Silty Sand 8.5 598 5138
NOTES: Resistivity Test and pH: California Test Method 643
Sulfate Content : California Test Method 417
Chloride Content : California Test Method 422
ND = Not Detectable
NA = Not Sufficient Sample
NR = Not Requested
Minimum
Resistivity
(ohm-cm)
96
81
CORROSION TEST RESULTS
Client Name: HDR AP Job No.: 21-0418
Project Name: Poseidon - CDP Intake Date:04/14/21
Project No.: 10295144
Boring Sample Depth Soil pH Sulfate Content Chloride Content
No. No. (feet) Description (ppm)(ppm)
A-21-002 4 20 Silty Sand 8.3 463 3140
NOTES: Resistivity Test and pH: California Test Method 643
Sulfate Content : California Test Method 417
Chloride Content : California Test Method 422
ND = Not Detectable
NA = Not Sufficient Sample
NR = Not Requested
115
Minimum
Resistivity
(ohm-cm)
CORROSION TEST RESULTS
Client Name: HDR AP Job No.: 21-0418
Project Name: Poseidon - CDP Intake Date:04/14/21
Project No.: 10295144
Boring Sample Depth Soil pH Sulfate Content Chloride Content
No. No. (feet) Description (ppm)(ppm)
A-21-003 5 30 Silty Sand 7.6 401 6107
NOTES: Resistivity Test and pH: California Test Method 643
Sulfate Content : California Test Method 417
Chloride Content : California Test Method 422
ND = Not Detectable
NA = Not Sufficient Sample
NR = Not Requested
84
Minimum
Resistivity
(ohm-cm)
Appendix D
Noise Models
Hydroacoustics Working Group/NMFS Hydroacoustics Tools Calculations
Project Title
Pile information (size, type,
number, pile strikes, etc.)
Peak SEL RMS Effective Quiet
Measured single strike level (dB)198 170 180 150
Distance (m) 22 22 22
Estimated number of strikes 1600
Cumulative SEL at measured distance
202
Behavior
Peak RMS
dB Fish ≥ 2 g Fish < 2 g dB
Transmission loss constant (15 if
unknown)206 187 183 150
15 6 221 409 2200
Notes (source for estimates, etc.)
Cumulative SEL dB**
** This calculation assumes that single strike SELs < 150 dB do not accumulate to cause injury (Effective
Reference: Hydroacoustic Effects of Pile Driving on Fish, Caltrans 2020.
Richmond-San Rafael Bridge - 14 inch steel pipe, Diesel Impact (Delmag D19-42)
Carlsbad Alternative 22
14 inch precast concrete piles.
40 temporary piles for temporary timber trestle/work
structure, 95 permanent piles.
Acoustic Metric
Distance (m) to threshold
Onset of Physical Injury
E.1: IMPACT PILE DRIVING (STATIONARY SOURCE: Impulsive, Intermittent)
VERSION 2.2: 2020
KEY
Action Proponent Provided Information
NMFS Provided Information (Technical Guidance)
Resultant Isopleth
STEP 1: GENERAL PROJECT INFORMATION
PROJECT TITLE Carlsbad Alternative 22
PROJECT/SOURCE INFORMATION
Hydroacoustic Effects of Pile
Driving on Fish
Caltrans 2020
Richmond-San Rafael Bridge -
14 inch steel pipe, Diesel Impact (Delmag D19-42)
Please include any assumptions
PROJECT CONTACT
STEP 2: WEIGHTING FACTOR ADJUSTMENT
Specify if relying on source-
specific WFA, alternative
weighting/dB adjustment, or if using default value
Weighting Factor Adjustment (kHz)¥2
¥ Broadband: 95% frequency contour percentile (kHz); For appropriate default WFA: See
INTRODUCTION tab † If a user relies on alternative weighting/dB adjustment rather than relying upon the WFA (source-specific
or default), they may override the Adjustment (dB) (row 73), and enter the new value directly.
However, they must provide additional support and documentation supporting this modification.
STEP 3: SOURCE-SPECIFIC INFORMATION
NOTE: METHOD E.1-1 is PREFERRED method when SEL-based source levels are available (because pulse duration is not required). Only use method E.1-2 if SEL-based source levels are not available.
E.1-1: METHOD TO CALCULATE PK AND SELcum (SINGLE STRIKE EQUIVALENT) PREFERRED METHOD (pulse duration not needed)
Unweighted SELcum (at measured distance) = SELss
+ 10 Log (# strikes)209.8
SELcum PK
Single Strike SELss (LE,p, single strike) specified
at "x" meters (Cell B32)170
Lp,0-pk specified at
"x" meters (Cell
G29)
198
Number of strikes per pile 1600 Distance of Lp,0-pk measurement
(meters)⁺
22
Number of piles per day 6 Lp,0-pk Source level 218.1
Transmission loss coefficient 15
Distance of single strike SELss (LE,p, single
strike) measurement (meters)22
RESULTANT ISOPLETHS**Impulsive sounds have dual metric thresholds (SELcum & PK). Metric producing largest isopleth should be used.
Hearing Group Low-Frequency
Cetaceans
Mid-Frequency
Cetaceans
High-Frequency
Cetaceans
Phocid
Pinnipeds
Otariid
Pinnipeds
SELcum Threshold 183 185 155 185 203
PTS Isopleth to threshold
(meters)1,349.0 48.0 1,606.9 721.9 52.6
“NA”: PK source level is < to the threshold for PK Threshold 219 230 202 218 232
that marine mammal hearing group. PTS PK Isopleth to threshold
(meters)NA NA 11.9 1.0 NA
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Gradall 1 0.4
2500 Front End Loader 1 0.4
50 Excavator 1 0.4
100
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Gradall 81.0
Front End Loader 76.0
Excavator 81.0
84.7
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
66.6
65.6
64.7
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
72.6
70.7
69.1
67.8
84.7 85
78.6
75.1
(Leq dBA)50 feet1
53.8 85
50.7 80
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Mobilization/Temporary Access Driveways
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Generator 82.0
Compressor (air) 82.0
87.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
70.0
Reference Emission
Noise Levels (Lmax) at Combined Predicted Noise Level
80.9
77.4
74.9
73.0
71.4
Leq dBA at 50 feet2
85
85
82
(Leq dBA)
56.1
68.9
67.9
67.0
53.0
87.0
Predicted Combined Noise Level (Leq dBA at 50 feet)
50 feet1
80
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Turbity Curtain Construction
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Impact Pile Driver 1 0.2
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Impact Pile Driver 88.0
Generator 82.0
Compressor (air) 82.0
90.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
Combined Predicted Noise Level Noise Levels (Lmax) at
Reference Emission
(Leq dBA)50 feet1
59.1 85
56.0 95
90.0 82
84.0 80
80.5
Predicted Combined Noise Level (Leq dBA at 50 feet)
78.0
76.0
74.4
73.1
71.9
70.9
70.0
Leq dBA at 50 feet2
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Temporary Access Trestle Installation
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Impact Pile Driver 1 0.2
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Impact Pile Driver 88.0
Generator 82.0
Compressor (air) 82.0
90.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
Combined Predicted Noise Level Noise Levels (Lmax) at
Reference Emission
(Leq dBA)50 feet1
59.1 85
56.0 95
90.0 82
84.0 80
80.5
Predicted Combined Noise Level (Leq dBA at 50 feet)
78.0
76.0
74.4
73.1
71.9
70.9
70.0
Leq dBA at 50 feet2
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Permanent Pile Driving
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Generator 82.0
Compressor (air) 82.0
87.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
Combined Predicted Noise Level Noise Levels (Lmax) at
Reference Emission
(Leq dBA)50 feet1
56.1 85
53.0 85
87.0 82
80.9 80
77.4
Predicted Combined Noise Level (Leq dBA at 50 feet)
74.9
73.0
71.4
70.0
68.9
67.9
67.0
Leq dBA at 50 feet2
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Deck Structure Construction
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Generator 82.0
Compressor (air) 82.0
87.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
68.9
67.9
67.0
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
74.9
73.0
71.4
70.0
87.0 82
80.9 80
77.4
(Leq dBA)50 feet1
56.1 85
53.0 85
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Temporary Access Trestle Removal
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Generator 2 0.5
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Generator 82.0
Compressor (air) 82.0
87.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
Combined Predicted Noise Level Noise Levels (Lmax) at
Reference Emission
(Leq dBA)50 feet1
56.1 85
53.0 85
87.0 82
80.9 80
77.4
Predicted Combined Noise Level (Leq dBA at 50 feet)
74.9
73.0
71.4
70.0
68.9
67.9
67.0
Leq dBA at 50 feet2
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Construction and Installation of Intake Screen Structure
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Drill Rig Truck 1 0.2
50 Excavator 1 0.4
100
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Drill Rig Truck 77.0
Excavator 81.0
83.6
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
65.5
64.5
63.6
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
71.5
69.6
68.0
66.7
83.6 85
77.5
74.0
(Leq dBA)50 feet1
52.7 85
49.6 84
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Construction and Installation of Intake Screen Structure
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500
50
100
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
77.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
59.0
58.0
57.0
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
65.0
63.1
61.5
60.1
77.0
71.0
67.5
(Leq dBA)50 feet1
46.2 85
43.1
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Vault for Bulkhead for Intake and Discharge Tunnel Isolation
Reference Emission
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Excavator 1 0.4
100 Compressor (air) 4 0.4
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Excavator 81.0
Compressor (air) 82.0
86.7
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
68.6
67.6
66.7
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
74.6
72.7
71.1
69.8
86.7 85
80.6 80
77.1
(Leq dBA)50 feet1
55.8 85
52.7 85
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Plant Shutdown
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Crane 1 0.16
2500 Gradall 1 0.4
50 Excavator 1 0.4
100 Tractor 2 0.4
150 Concrete Batch Plant 1 0.15
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Crane 77.0
Gradall 81.0
Excavator 81.0
Tractor 83.0
Concrete Batch Plant 74.8
87.3
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
69.2
68.2
67.3
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
75.2
73.3
71.7
70.4
87.3 85
81.3 84
77.7 83
(Leq dBA)50 feet1
56.4 85
53.3 85
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Demolition of Existing tunnels
Distance to Nearest Equipment Usage
Location Receiver in feet Assumptions Qty.Factor1
Nearest Sensitive Receptor 1750 Gradall 1 0.4
2500
50
100
150
200
250
300 Ground Type Hard
350 Source Height 5
400 Receiver Height 8
450 Ground Factor 0.00
500
Predicted Noise Level
2
Gradall 81.0
81.0
Sources:
1 - Obtained from the FHWA Roadway Construction Noise Model, January 2006.
2 - Based on the following from the Federal Transit Noise and Vibration Impact Assessment, 2006.
Leq(equip) = E.L.+10*log (U.F.) - 20*log (D/50) - 10*G*log (D/50)
Where: E.L. = Emission Level;
U.F.= Usage Factor;
G = Constant that accounts for topography and ground effects; and
D = Distance from source to receiver.
*Project specific threshold
63.0
61.9
61.0
Leq dBA at 50 feet2
Predicted Combined Noise Level (Leq dBA at 50 feet)
69.0
67.0
65.5
64.1
81.0
75.0
71.5
(Leq dBA)50 feet1
50.1 85
47.0
Reference Emission
Combined Predicted Noise Level Noise Levels (Lmax) at
Appendix D
Project-Generated Construction Source Noise Prediction Model
Carlsbad Desalination Intake - Construction and Installation of Intake Screen Structure
MEMORANDUM
To: Michelle Peters and Peter MacLaggan, Poseidon Water
From: Caitlin Munson, Dudek
Subject: Focused Analysis for Alternative 22 and City of Carlsbad Fire Station Project
Date: September 20, 2022
1 Introduction and Background
Poseidon is seeking approvals for certain modifications to the Carlsbad Desalination Plant (CDP) intake and
discharge system (Project), including from the City of Carlsbad (the City). The Project will allow the CDP to operate
in permanent stand-alone operating mode, independent of the previously co-located Encina Power Station (EPS).
The Project is described in the San Diego County Water Authority’s (Water Authority) Seventh Addendum to the
Precise Development Plan and Desalination Plant Project (Seventh Addendum) (dated May 2022). Separately, the
City has proposed to locate, construct, and operate a temporary Fire Station (Temporary Fire Station 7 or Fire
Station) at the NRG warehouse (400 feet southeast of the proposed CDP intake modifications). This memorandum
considers impacts to Temporary Fire Station 7 and cumulative impacts associated with Temporary Fire Station 7
and the Project.
2 Project Descriptions
2.1 Description of the Fire Station Project
The City is relocating its Temporary Fire Station 2 to a new Temporary Fire Station 7 location at the NRG warehouse,
south of the CDP. The Fire Station would be located at 4600 Carlsbad Boulevard. The Fire Station would include
four main components: a yard/laydown area, one sprung1 structure (garage facility), and two trailers. The NRG
Administration Building site would serve as a yard area to lay down fire hoses. The sprung structure is an existing
structure located at Temporary Fire Station 2, which would be expanded from approximately 1,600 square feet to
3,200 square feet and would serve as storage space for an ambulance, lifeguard rescue watercraft, and other
equipment. The sprung structure would be transported and installed at the new Fire Station site. Trailer 1 is
approximately 1,800 square feet and would serve as residential and office space. Trailer 1 would be relocated from
Temporary Fire Station 2 and installed at the new site. Trailer 2 is approximately 1,400 square feet and would
include office space and sleeping quarters for Fire Station employees. Trailer 2 is a new structure that would be
procured for the new Fire Station.
1 Sprung is a brand name for a modular building made of fabric tautly stretched over a frame.
EXHIBIT 5
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 2 SEPTEMBER 2022
2.1.1 Construction Phasing and Schedule
Construction of the Fire Station would occur from September 2022 to January 2023. Staging will occur on the NRG
Administration Building pad, located north of the NRG warehouse. Construction would involve the following phases:
• Demolition of existing NRG warehouse (already completed)
• Installation and expansion of modular (Sprung) structure
• Relocation and installation of Trailer 1 (1 day)
• Pad finish work
• Site Utilities
• Install Trailer 2
2.1.2 Operation and Maintenance
Operation of the new Fire Station would begin in January 2023. Access to and from the Fire Station site would occur
along Carlsbad Boulevard, via the driveway located south of the Lagoon. The new Fire Station will be used as offices
and sleeping quarters for up to seven fire department personnel.
2.2 Desalination Plant Project Proposed Modifications
Overview
In general, the proposed intake design modification would include installation of a partially submerged intake
system in the Lagoon (including new Dual Flow Screens (DFS) structure, new deck structure, and a floating boom).
A debris return area, which would include a debris bin, and debris pipeline, would be constructed between the
discharge pond and intake system. In addition, modifications include the installation of a prefabricated electrical
building, the demolition of the marine research shed and relocation and replacement with a portable container and
the replacement and relocation of the boat ramp. The modifications would involve the abandonment-in-
place/demolition of the existing EPS intake screens and channels and the 72-inch feeder line, the discharge
channel, and construction of a new 72-inch intake pipeline (feeder) and vault.
The partially submerged intake system would be located in the Lagoon directly north of the existing EPS intake that
would direct seawater to the existing EPS intake tunnels (see Figure 1, Proposed Modified Intake Design Site Plan).
The source water of approximately 299 MGD would pass through the partially submerged intake screening system
and then to the existing intake pump station which would continue to deliver the process feedwater (up to 127
MGD) to the CDP for processing through the pre-treatment and reverse osmosis (RO) membrane desalination
system. Approximately half the water volume processed by the CDP would leave the CDP as potable drinking water,
and the other half would be concentrated seawater with approximately twice the original intake water salinity.
The remaining water passing through the intake screens would be transferred to the discharge tunnel by fish-
friendly pumps to reduce the salinity of the brine discharge from the CDP before being discharged into the Pacific
Ocean.
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 3 SEPTEMBER 2022
Dual Flow Screens Intake Structure
The DFS would have 1-millimeter (mm) slot widths and a through-slot velocity of 0.5 feet per second or less
(including 15% screen inclusion) for compliance with the Desalination Amendment (SWRCB 2015).
The DFS structure would house the screens, baffle walls, and the large organism exclusion device (i.e. mammals
and turtles and would be added only if required by a regulating entity but is included in this addendum). The DFS
structure is approximately 160 feet by 32 feet and extends approximately 25 feet above water (mean sea level)
and 15 feet below the water (mean sea level) for a total height of approximately 40 feet tall. The DFS structure
would be anchored with approximately 46 piles and approximately 1 pile in between each DFS for flow distribution
for approximately 10 piles, totaling approximately 56 piles (approximately 14 – 24 square inches each). Within the
structure, a total of 11 DFS units (10 duty, 1 standby) would be installed. Located above water, a grated access
way would be installed between the DFS which allows for access to equipment for ongoing daily and long-term
maintenance and inspections. All mechanical and electrical components would remain above water.
The screen panels are propelled on a chain link fitted with a water soluble/food grade lubricated roller. As the
screen panels descend, a high-pressure wash spray will be used to remove the debris from the screens and into a
combined trough/pipeline that carries both water and debris to the discharge pond. At the end of the
trough/pipeline there will be a trash/debris sorting area that will allow trash to be removed before brushing organic
debris into the discharge pond.
In addition, the DFS structure requires a means to direct flow from the Lagoon, through the screening system and
into the existing intake tunnels. To accommodate this requirement, baffle wall panels and wing walls would span
between screens and along the east and west side of the DFS structure. The baffle walls and wing walls would be
oriented towards the Lagoon to direct flow into the DFS and from the DFS structure to the existing intake tunnels.
Floating Boom
A floating debris boom/curtain would be installed in front of the intake screens to block floating debris from
entering the proposed DFS structure. The floating debris boom/curtain would extend from the surface of the
Lagoon to approximately 3 to 5 feet below the surface of the water and would be anchored to the Lagoon floor. The
anchor would include a riser connection system that allows the floating debris boom/curtain to rise and fall freely
with tidal fluctuations. The floating boom will collect surface debris near the east and west ends of the boom. A
workboat would be required to remove debris on an as needed basis to collect and remove trash then dispose of
organic debris in the discharge pond.
In addition, a large organism exclusion device may be installed between the floating debris boom/curtain and the
DFS structure to avoid impacts to marine species. Staff will operate the debris rake once or twice a day (as needed)
to remove debris off the large mammal exclusion device and drop debris into a collection bin near the discharge
pond. Trash will be removed from the bins and the remaining organic debris will be dropped into the discharge
pond.
Deck
An above water deck located south of the DFS structure, spanning from the east side to the west side of the Lagoon,
would be constructed to serve as vehicle and pedestrian access for the intake system maintenance. The deck
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 4 SEPTEMBER 2022
includes the installation of approximately 58 piles (14 – 24 square inches each) and would be approximately 200
feet long and 30 feet wide. This deck structure may have a flexible connection to the DFS structure such that each
moves independently, which would be evaluated during final design.
Electrical Building
A prefabricated electrical building would be located near the existing electrical building and would be approximately
500 square feet and at an elevation of approximately 14 feet above grade. This structure would house electrical
needs to power the new screens.
Boat Ramp
The existing boat ramp, which is located in the footprint of the deck, would be demolished. A new boat ramp would
be installed north of the intake and floating boom. The boat ramp would include an 8 foot by 8 foot square platform,
a 3 foot by 10 foot ramp to dock platform, and a 3 foot by 20 foot concrete stairs and platform.
Marine Research Portable Container
The existing marine research shed is located south of the discharge pond. This existing shed would be removed
and replaced with a portable container. The portable container would be located northwest of the existing shed and
south of the discharge pond.
Temporary Fish Farm Access and Parking Lot
The existing access to the aquafarm facility will be restricted during construction. Two temporary access ramps will
be installed to provide aquafarm vehicle access during construction from Carlsbad Boulevard. The access ramps
will transition from concrete to gravel. Once construction is completed, the curb, gutter, and sidewalk will be
returned to match existing conditions. A parking lot would be constructed for visitors to the Fish Farm.
Intake Channel and Discharge Channel and Feeder Line Demolition/Abandonment in Place
The former cooling water system for the EPS consisted of two, below-ground concrete intake channels (inside
dimensions of each channel 8 feet high by 11 feet wide) and one below-ground concrete discharge channel (inside
dimensions 8 feet high by 15 feet wide). The wall thickness of the reinforced concrete channels is approximately 3
feet. After the intake modifications are constructed, the screens (including auxiliary equipment) will be removed
and approximately 300-foot lengths of the intake and discharge channels south of the lease line will be abandoned-
in-place/demolished.
In addition, adjacent to the discharge channel, an intake concrete vault was constructed in 2013-2015. The 10
foot by 11 foot concrete vault (approximately 30 feet deep) connects the discharge channel to the desalination
plant’s Intake Pump Station via a 72-inch reinforced fiberglass plastic (FRP) pipeline, approximately 300 feet long.
The 72-inch intake pipeline and the vault will be abandoned-in-place/demolished.
2.2.1 Construction Phasing and Schedule
Construction of the Project is anticipated to begin in Q4 2022 and last approximately one year. The following general
construction subphases are anticipated:
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 5 SEPTEMBER 2022
1. Mobilization/Temporary Access Driveways for Aquafarm
a. Removal and relocation of a portable container for the marine research shed
b. Replacement and relocation of the boat ramp
c. Placement of electrical building
d. Construction of temporary access driveway
2. Turbidity curtain install, dredging/excavation of approximately 2,200 cubic yards of the Lagoon floor for
screen structure foundation installation, and backfill
3. Temporary trestle installation
a. Pile driving
b. Work platform structure installation
c. Final removal
4. Pile driving (for screen, baffle walls, and deck)
a. Screens
b. Baffle walls
c. Deck
5. Intake screen structure construction
a. Floor slab for screen support
b. Screen structures
c. Baffle walls
d. DFS
e. Floating debris boom/curtain
f. Large organism exclusion device
6. Deck structure construction
7. Install 72-inch line
a. Shoring
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 6 SEPTEMBER 2022
b. Sheet piles
c. Steel sheets
d. Excavation
e. Soil stockpile
8. Construct vault for bulkhead and discharge isolation
a. Existing mechanical equipment including traveling screens, spray wash pumps etc. will be removed
and recycled as scrap steel.
b. Existing steel stop logs will be removed and recycled as scrap steel.
c. Existing electrical equipment, conduits, wiring, electrical panels and lights will be removed. Usable
material will be recycled as scrap.
d. Any existing concrete (curbs, concrete columns for the former gantry crane) will be demolished to
existing grade.
9. Plant Shutdown:
a. Connection of the new onshore intake pipeline from the intake tunnel to the existing intake pump
station
b. Sealing the intake and discharge tunnels
10. Commissioning and testing
11. Demolition/Abandonment of existing tunnels and 72-inch feeder line
12. Demobilization
2.2.2 Operation and Maintenance
Maintenance activities for the DFS may include the following:
1. Checking of overall operation, oil leaks/levels, spray wash system operation and pressure, debris
trough/pipeline, tension of chains, etc.
2. Routine and long-term inspections of drive gearbox, spray nozzles, chains/sprockets, screen mesh, frame
condition, roller track, guides, controls/alarms, etc.
3. Applying grease, changing oil, tightening chains, and water soluble/food grade adding lubricants as
needed.
Typically, a DFS itself would last for a 30-year cycle with proper maintenance. However, the DFS chain may
have to be replaced every 2-3 years and can be performed with the assistance of divers in the water. In
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 7 SEPTEMBER 2022
addition, if the guides need repair or replacement, the DFS would be removed and the work would be
performed onshore.
As noted above, debris maintenance would require the use of a high-pressure wash spray that would be used
to remove the debris from the screens and into a combined trough/pipeline that carries both water and debris
to the discharge pond. At the end of the trough/pipeline there would be a trash/debris sorting area that would
allow trash to be removed before brushing organic debris into the discharge pond. Portions of the floating
debris boom/curtain would be adjustable to allow for surface maintenance vessel entrance/exit to the area.
As noted above, the floating boom would collect surface debris near the east and west ends of the boom. A
workboat would be required to remove debris on an as needed basis to collect and remove trash then dispose
of organic debris in the discharge pond. In addition, a large organism exclusion device may be installed
between the floating debris boom/curtain and the DFS structure to avoid impacts to marine species. Staff
would operate the debris rake once or twice a day (as needed) to remove debris off the large mammal
exclusion device and drop debris into a collection bin near the discharge pond. Trash would be removed from
the bins and the remaining organic debris would be dropped into the discharge pond.
Minimal operational staff at the CDP is expected to be required for the operation of the proposed
modifications. The proposed modifications would include exterior nighttime security lighting in compliance with
City ordinances with respect to shielding, light pollution reduction, glare, and sky glow.
3 Focused Environmental Analysis
The following analysis considers the proposed modifications’ noise, vibration, and traffic impacts to the Fire Station,
because these environmental topics consider impacts to sensitive receptors and operations of the Fire Station
(Sections 3.1 and 3.2). The proposed modifications are not anticipated to result in impacts to other environmental
topics associated with the Fire Station (e.g., aesthetics) or are not applicable to the Fire Station (e.g., biological
resources). For select environmental topics, this analysis considers the cumulative impact of the proposed
modifications with the Fire Station (Section 3.3). Environmental topics where no cumulative impacts are anticipated
were not included in the analysis (e.g., recreation, pop/housing, etc.).
3.1 Noise and Vibration
Construction
Construction noise and vibration are temporary phenomena. Construction noise and vibration levels vary from hour
to hour and day to day, depending on the equipment in use, the operations performed, and the distance between
the source and receptor.
Equipment that would be in use during construction of the project modifications would include, in part, cranes,
manlifts, drill rigs, generator sets, welders, and air compressors. The typical maximum noise levels for various
pieces of construction equipment at a distance of 50 feet are presented in Table 1. Usually, construction equipment
operates in alternating cycles of full power and low power, producing average noise levels over time that are less
than the listed maximum noise level. The average sound level of construction activity also depends on the amount
of time that the equipment operates and the intensity of construction activities during that time.
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 8 SEPTEMBER 2022
Table 1. Construction Equipment Noise Emission Levels
Equipment Description Acoustical Use Factor (%) Lmax at 50 feet (dBA, slow)1
Auger Drill Rig 20 85
Crane 16 85
Flat Bed Truck 40 84
Generator 50 82
Impact Pile Driver2 20 95
Pneumatic Tools 50 85
Source: DOT 2006; FTA 2018. Notes: Lmax = maximum noise level; dBA = A-weighted decibels; N/A = not applicable.
1 All equipment fitted with a properly maintained and operational noise control device, per manufacturer specifications.
2 Impulsive/impact device.
Aggregate noise emissions from project modification construction activities, broken down by sequential phase, were
predicted from the geographic center of the construction site to the nearest existing noise-sensitive receptor (i.e.,
Fire Station), which serves as the time-averaged location or geographic acoustic center of active construction
equipment for the phase under study. The acoustic center distance is used in a manner similar to the general
assessment technique as described in Federal Transit Administration (FTA) guidance for construction noise
assessment (FTA 2018), when the location of individual equipment for a given construction phase is uncertain over
some extent of (or the entirety of) the construction site area. Because of this uncertainty, all the equipment for a
construction phase is assumed to operate—on average—from the acoustic center. The acoustic center was
calculated by taking the square root of the product of the nearest distance from construction activity to the nearest
noise-sensitive receptor (NSR) and the furthest distance from construction activity to the NSR.
A noise prediction model emulating and using reference data from the Federal Highway Administration Roadway
Construction Noise Model (RCNM) (Federal Highway Administration 2008) was used to estimate construction noise
levels at the nearest occupied noise-sensitive land use. (Although the RCNM was funded and promulgated by the
Federal Highway Administration, it is often used for non-roadway projects, because the same types of construction
equipment used for roadway projects are often used for other types of construction.) Input variables for the
predictive modeling consist of the equipment type and number of each (e.g., two graders, a loader, a tractor), the
duty cycle for each piece of equipment (e.g., percentage of time within a specific time period, such as an hour, when
the equipment is expected to operate at full power or capacity and thus make noise at a level comparable to what
is presented in Table 1), and the distance from the noise-sensitive receiver. The predictive model also considers
how many hours that equipment may be on site and operating (or idling) within an established work shift.
Conservatively, no topographical or structural shielding was assumed in the modeling. The RCNM has default duty-
cycle values for the various pieces of equipment, which were derived from an extensive study of typical construction
activity patterns. Those default duty-cycle values were used for this noise analysis and produce the predicted results
at the Fire Station are displayed in Table 2.
Table 2. Predicted Construction Noise Levels
Construction Phase
Leq (dBA) at Fire
Station (~400 feet)
Leq (dBA) at Fire
Station (~ 150
feet)1
Mobilization/Temporary Access Driveways for Aquafarm 66.6 -
Turbidity Curtain Construction 68.9 -
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7662 9 SEPTEMBER 2022
Temporary Access Trestle Installation 71.9 -
Permanent Pile Driving 71.9 -
Deck Structure Construction 68.9 -
Temporary Access Trestle Removal 68.9 -
Construction and Installation of Intake Screen Structure 68.9 -
Install 72 Inch Line - 74.0
Vault for Bulkhead for Intake and Discharge Tunnel Isolation - 67.5
Plant Shutdown 68.6 -
Demolition of existing tunnels - 77.7
Demobilization 63.0 -
Notes: NSR = Noise Sensitive Receptor; dBA = A-weighted decibels
1 Construction activities occurring at this distance include vault for bulkhead for intake and discharge tunnel isolation, the
installation of the 72-inch line, and demolition of existing tunnels. All other construction activities would occur approximately
400 feet away from the proposed Fire Station.
As presented in Table 2, the estimated construction noise levels at the Fire Station are predicted to range from
approximately 63.0 A-weighted decibels (dBA) equivalent sound level (Leq) and 77.7 dBA Leq. Accounting for the
man-made intervening structures present along the path between the project modifications site and the nearest
noise-sensitive receptor, construction noise levels would be further reduced by 5 to 8 decibels (dB) due to shielding
provided by the topography and intervening structures.
The City of Carlsbad Municipal Code regulates construction noise by limiting the hours of operation. Construction
activities are allowed to occur Monday through Friday between the hours of 7 a.m. to sunset; and on Saturdays
from 8 a.m. to sunset, excluding legal holidays. The City does not have quantitative noise level limits (i.e., based on
sound levels) for general nuisance noise such as that associated with stationary equipment located on private
property. Construction activities would be limited to the hours specified in the Municipal Code.
As described in the City of Carlsbad Noise Guidelines Manual, if construction activities are to occur near a noise
sensitive land use, the construction contractor must provide appropriate noise attenuation devices (such as
mufflers) on all construction vehicles or equipment located within 1,000 feet of noise sensitive land uses (City of
Carlsbad 2013). Construction equipment would be equipped with noise attenuation devices and would limit hours
of construction as specified in the Municipal Code; therefore, construction noise impacts at the Fire Station would
be considered less than significant.
Construction activities could result in varying degrees of temporary groundborne vibration or noise, depending on
the specific construction equipment used and operations involved. Representative groundborne vibration levels for
various types of construction equipment, developed by FTA, are summarized in the Table 3.
A vibration limit of 0.1 in/sec PPV will be used to minimize the potential for annoyance at the proposed Fire Station.
Table 3. Representative Vibration Levels for Construction Equipment
Equipment PPV at 25 feet (in/sec)1,3 PPV at 400 feet (in/sec)1,3
Pile Driver (Impact) Upper Range 1.518 0.024 in/sec
Typical 0.644 0.010 in/sec
Hoe Ram 0.089 0.001 in/sec
Large Bulldozer 0.089 0.001 in/sec
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7662 10 SEPTEMBER 2022
Caisson Drilling 0.089 0.001 in/sec
Heavy-duty Trucks (Loaded) 0.076 0.001 in/sec
Jackhammer 0.035 0.001 in/sec
Small Bulldozer 0.003 <0.001 in/sec
Notes:
1. Where PPV is the peak particle velocity.
2. Where Lv is the RMS velocity expressed in vibration decibels (VdB), assuming a crest factor of 4.
3. Vibration levels can be approximated at other locations and distances using the above reference levels
and the following equation: PPVequip = PPVref (25/D)1.5 (in/sec); where “PPV ref” is the given value in
the above table, “D” is the distance for the equipment to the new receiver in feet.
Source: FTA 2018.
As shown in Table 3, the upper range of impact pile driving operations could generate peak particle velocities of
approximately 1.518 in/sec PPV, while heavier pieces of construction equipment, such as large bulldozers which
may be utilized for the project modifications, have been documented to generate peak particle velocities of
approximately 0.089 in/sec PPV or less at a reference distance of 25 feet (FTA 2018).
Groundborne vibration attenuates rapidly, even over short distances. The attenuation of groundborne vibration as
it propagates from source to receptor through intervening soils and rock strata can be estimated with expressions
found in FTA and Caltrans guidance (Caltrans 2020). By way of example, the upper range of groundborne vibration
generated by impact pile driving activities would attenuate to an estimated vibration velocity of 0.05 in/sec per the
equation as follows (FTA 2018):
PPVrcvr = PPVref * (25/D)^1.5 = 0.05 = 1.518 * (25/400)^1.5;
where PPVrcvr is the predicted vibration velocity at the receiver position, PPVref is the reference value at 25 feet from
the vibration source (the pile driver), and D is the actual horizontal distance to the receiver.
The proposed Fire Station would be located 400 feet southwest of the project modifications because the Fire
Station would be occupied, the Caltrans threshold of annoyance (0.1 in/sec PPV) will be considered. This is the
level in which vibratory activities begin to annoy people (Caltrans 2020). As shown above, the upper range of
groundborne vibration generated by impact pile driving activities would attenuate to an estimated vibration velocity
of 0.02 in/sec at the proposed Fire Station (FTA 2018).
The predicted 0.02 in/sec PPV at the Fire Station approximately 400 feet away from the impact pile driving activities
during construction would not surpass the threshold of annoyance of 0.10 in/sec PPV. Because the predicted
vibration level at 400 feet is less than the threshold of annoyance, vibration from project construction activities is
considered less than significant.
Construction of the fish farm parking lot was assessed in the Seventh Addendum, in the temporary access driveway
construction phase, because the construction of the parking lot would involve the use of the same equipment.
Therefore, no new impacts would occur as part of this project component.
Operation
Project modifications are expected to generate only a modest number of O&M vehicle trips (e.g., less than 10 daily
vehicle trips). Under the existing conditions, roadway segments in the project modification study area (traffic
analysis zone number 813, per SANDAG TCIF) carry up to an estimated 18,512 daily trips (SANDAG 2019). Thus,
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7662 11 SEPTEMBER 2022
vehicle trips associated with the project modifications would represent a negligible incremental increase in traffic
volumes in the area.
Typically, a doubling of the energy of a noise source, such as a doubling of traffic volume, would increase noise
levels by 3 dBA. Under normal circumstances (non-laboratory settings), a 3-dBA increase in noise levels is
considered to be the smallest increase that is audible to the human ear; whereas a less than 3-dBA increase in
noise levels is considered to be a barely or non-audible increase. Given that it would result in only a modest increase
in traffic volumes on local roadways, the project modifications are not expected to result in an increase of 3 dBA or
greater on roadways in the study area. Therefore, impacts at the Fire Station associated with project modification-
generated traffic noise would be less-than-significant.
The project modifications would generate noise from personnel and maintenance vehicles accessing the site.
Maintenance vehicles would include one pick-up truck and one hydraulic forklift. Because the proposed
modifications would not result in an increase in permanent staffing at the CDP that would create additional
operational vehicle trips, would not be a significant increase in personnel and maintenance vehicle trips within the
project site; and thus, would not substantially change the existing noise conditions on the site. These vehicle trips
would generally be limited to the hours of operation and thus would not operate at night. Noise impacts at the Fire
Station associated within onsite vehicles would be less than significant.
The project modifications would consist of stationary operational noise sources adjacent to the existing EPS intake
tunnels. The components that have the potential to generate noise would include the continuously rotating 1-mm
screen panels contained within the DFS frames, spray wash pumps to clean the screen panels as needed, and the
existing intake pump station. These components may need to operate 24 hours a day, depending on source water
conditions. Because the pump station is currently in operation, and there are no proposed changes to its operation,
this stationary source is already considered part of the existing noise environment. However, the operation of the
continuously rotating screen panels and spray wash pumps could contribute additional noise. The screen panels
would be located underwater in the Lagoon and thus the rotation of the panels would not be heard at the Fire
Station. The motor used to operate the screen panels is electrical and would require 5.0 HP. The motor used to
operate the spray wash pumps is 150 HP. As a point of comparison, the intake pump is rated at 750 HP. Therefore,
the screen panel motor and spray wash pump are not anticipated to be heard over the existing intake pump and
would not be heard from the Fire Station.
The fish farm temporary parking lot could generate noise associated with visitor vehicles driving into the parking
lot. However, the parking lot is located more than 900 feet from the proposed Fire Station and would not be heard
above traffic noise from Carlsbad Boulevard. Therefore, no new impacts would occur as part of this project
component.
The Fire Station would be exposed to traffic noise levels from Interstate 5, and Carlsbad Boulevard. Given this
consideration, and intervening structures that would buffer stationary sources and operational noises from the Fire
Station, the project modification operations and maintenance are not anticipated to expose the Fire Station to
significant sources of noise. As such, impacts would be less than significant.
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7662 12 SEPTEMBER 2022
3.2 Traffic
Construction
The proposed modifications would result in short-term construction traffic increases. Construction related traffic
would be temporary and is not expected to be substantial due to the limited size and schedule for construction
related activities. Additionally, construction activities would be confined to the intake structure site location and
southern extent of the outer Lagoon and would not utilize public roadways for construction. Construction traffic due
to the proposed modifications would be required to adhere to the approved traffic control plan provided as
mitigation within the FEIR to ensure minimal disruption to the level of service of nearby roadways. Construction of
the fish farm parking lot was captured in the Seventh Addendum, in the temporary access driveway construction
phase, because the construction of the parking lot would involve the use of the construction vehicles.
Construction vehicles would enter the site and could have the potential to disrupt Fire Station operations.
Construction vehicles for the proposed modifications would use the same entrance and exit as the Fire Station;
however, there will be multiple routes within the project site to allow the Fire Station to have an alternative route
on the property, if needed, to access the site's entrance and exit. Construction of the fish farm temporary parking
lot would require a different entrance and exit than the Fire Station. Therefore, no impact to the Fire Station would
occur as part of the proposed modifications.
Operation
After construction, vehicle trips associated with operation of the proposed modifications would be similar to those
previously analyzed under the previous environmental documents. Furthermore, proposed modifications would not
result in an increase in permanent staffing at the CDP that would create additional operational vehicle trips. As
such, the proposed modifications would not result in an increase in traffic on local roadways during operations and
maintenance compared to that analyzed in the previous environmental documents. Therefore, long-term impacts
to transportation and traffic would be similar to the approved project and impacts would remain less than
significant.
The project modifications would include operation of one pick-up truck and one hydraulic forklift. These
maintenance vehicles would operate immediately south of the intake structure and thus would be located away
from the Fire Station. Vehicles associated with the operation of the proposed modifications would use the same
entrance and exit as the Fire Station; however, there will multiple routes within the project site to allow the Fire
Station to have an alternative route on the property, if needed, to access the site's entrance and exit. As part of the
City’s relocation of the Fire Station, local traffic lights would also be modified to allow Fire Station vehicles to quickly
access local roads. Impacts to the Fire Station would be less than significant.
The fish farm parking lot could generate traffic associated with visitor vehicles driving into the parking lot. However,
the fish farm temporary parking lot would require a different entrance and exit driveway than the Fire Station.
Operation of the fish farm temporary parking lot would only generate a few trips per day and thus would represent
a negligible incremental increase in traffic volumes in the area. Therefore, no impacts to the Fire Station would
occur.
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SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 13 SEPTEMBER 2022
3.3 Cumulative Impacts
A brief discussion of the proposed modification’s and the proposed Fire Station’s potential cumulative impacts
relative to each environmental topic is provided below. The City considered the Fire Station’s potential
environmental impacts when it approved a conditional use permit (CUP) for the project on December 20, 2021.
The City concluded that the Fire Station was consistent with the City’s land use regulations and would not result in
any new environmental impacts upon implementation of the CUP conditions. The City further determined that the
Project belongs to a class of projects that the State Secretary for Natural Resources has found do not have a
significant impact on the environment, and that the development was therefore categorically exempt from the
requirement for the preparation of environmental documents (City of Carlsbad 2021). Similarly, the California
Coastal Commission (Commission) issued, with conditions, a coastal development permit for the Fire Station on
May 11, 2022. The Commission determined that the Project was consistent with the City’s LCP and Chapter 3
policies of the Coastal Act and would not result in any adverse environmental impacts upon implementation of the
required mitigation measures, including conditions addressed in the permit (California Coastal Commission 2022).
This analysis relies on the environmental impacts analyses contained in the City’s CUP determination and the staff
report recommendations adopted by the Commission when it approved the Fire Station’s coastal development
permit application as well as information provided by City staff.
Aesthetics
The proposed DFS and deck structure are at a height and scale that is consistent, if not smaller, than surrounding
structures. The majority of the structure would not be visible, as it would be located underwater. The proposed
modifications are designed with the same visual character as the existing aesthetic on the EPS site and of the CDP.
Further, Poseidon would comply with mitigation measures in the CDP’s Final EIR related to building design and
shielding. Likewise, the proposed Fire Station would be a consistent height and scale as other NRG structures
located in that portion of the project site and will not impact public views. As such, the incremental effect of the
proposed modifications and the Fire Station on any potential significant cumulative impact would not be
cumulatively considerable.
Air Quality
The proposed modifications and the Fire Station’s contribution to temporary regional or localized cumulative air
quality impacts is not considered to be significant because construction of the proposed modifications and the Fire
Station would occur over a relatively short time period and occupy a relatively small area. This is primarily due to
the short-term nature of cumulative effects within the vicinity of the proposed modifications. Any additional
cumulative development would not change these conclusions because the scope of the cumulative development
is relatively small within the context of the air basin, and construction-related emissions would be short-term in
nature. The construction of the Fire Station would only occur for up to four months, and thus would be negligible in
a cumulative context.
Because of their long-term nature, emissions from CDP operations for pollutants for which the San Diego Air Basin
is not in attainment with state and federal standards are considered cumulatively significant. The Final EIR and
SEIR for the CDP concluded that the CDP’s operations would contribute indirectly to a significant cumulative impact
to air quality from the use of electricity, the generation of which causes emissions of pollutants. As discussed in
the Seventh Addendum, there would not be a substantial increase in new operational air pollutant emissions not
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 14 SEPTEMBER 2022
already considered in the previous environmental documents associated with the proposed modifications. The
operation of the Fire Station also would not result in substantial new criteria air pollutant emissions, because the
project involves the relocation of an existing Fire Station, and emissions associated with employee vehicles and
Fire Station equipment are not expected to substantially increase as result of that relocation. Therefore, the
combined operation of the CDP as modified by the proposed modifications and Fire Station would not substantially
change the previously-identified cumulative impact as discussed in the Seventh Addendum.
Biological Resources
Terrestrial resources relevant to the Fire Station footprint consist of developed land. Breeding habitat for bird
species is not available within the Fire Station footprint and neither the proposed modifications nor the Fire Station
will have an adverse impact to any natural slopes or sensitive terrestrial biological habitats. No cumulative impacts
to terrestrial resources would occur.
The proposed modifications and Fire Station would be required to comply with applicable Clean Water Act,
Endangered Species Act, Coastal Act, and other regulatory requirements designed to protect the marine biological
environment, which would minimize impacts to marine biological resources. Although the proposed Fire Station
would be under construction at the same time as the project, the Fire Station would not involve marine construction
and will be located approximately 400 feet from the Lagoon waters. Special Condition 2 of the Fire Station’s coastal
development permit requires submittal of final plans to confirm the proposed work area. Thus, as the Commission
determined as part of its permit review, the Fire Station will not result in adverse impacts to water quality. Therefore,
during construction, a cumulative impact to marine biological resources would not occur, and the proposed
modifications and Fire Station would not cumulatively contribute to a significant cumulative impact.
The operation of the Fire Station would not occur close enough to the Lagoon to be considered a cumulative project
in regards to ocean water quality or noise impacts to marine species. Therefore, during operation, a significant
cumulative impact would not occur, and the operation of the CDP as modified by the proposed modifications and
the Fire Station would not cumulatively contribute to a significant cumulative impact.
Cultural Resources
Construction of the CDP has largely been completed. Construction of the proposed modifications would implement
the mitigation measures required for the approved CDP, as well as Special Condition 8 from the Coastal
Development Permit for the intake modifications (approved on September 8, 2022), which each provide for
avoidance, documentation, and/or recovery of important cultural resources, and as a result, all impacts related to
cultural resources with respect to the CDP are reduced to less-than-significant levels. The Fire Station would require
limited ground disturbance through the use of modular and sprung structures on an existing concrete pad. The
only disturbance associated with the Fire Station would be minor trenching to connect to existing underground
utilities in an already-developed area. However, this area has been previously disturbed and only limited trenching
would occur in this area. Therefore the level of potential cumulative impact would not change. As such, the CDP,
as modified by the proposed modifications, and the Fire Station would not have a cumulatively considerable
contribution to a cultural resource impact.
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7662 15 SEPTEMBER 2022
Energy
The electricity used for construction of the proposed modifications and Fire Station would be temporary and
operational electricity consumption would have a negligible contribution to the proposed modification’s and Fire
Station’s overall energy consumption. The construction of the proposed modifications and Fire Station is not
anticipated to require natural gas during construction or operation. While the proposed modifications and Fire
Station would see an increase in petroleum use during construction and operation, vehicles would use less
petroleum due to advances in fuel economy and potential reduction in VMT over time.
The operation of the Fire Station would not result in substantial new energy consumption, because the project
involves the relocation of an existing Fire Station, and energy demand associated with employee vehicles, Fire
Station equipment, and building energy is not expected to increase substantially as a result of that relocation.
During operations, the CDP as modified by the proposed modifications and the Fire Station would be required to
comply with the state’s Title 24 energy performance standards and the City’s General Plan energy conservation
policies and actions, and the CDP would also be required to comply with the CDP’s Energy Minimization and GHG
Reduction Plan. With implementation of the state and City energy code and policies, cumulative impacts would be
less than significant.
Geology and Soils
The proposed modifications would require construction on pile foundations which would derive support from deeper
relatively incompressible layers. The proposed modifications would implement the approved CDP mitigation to
control and address erosion, seismic, and soils hazards such that these hazards are not exacerbated by project
development. Construction of the Fire Station would require compliance with applicable building codes and geologic
hazard regulations standards and thus similar construction practices and erosion control measures, where
applicable, would be implemented. Additionally, the disturbance at the Fire Station site will be limited through the
use of modular and sprung structures on an existing concrete pad. Therefore, its development will not result in
erosion. Cumulative impacts associated with the proposed modifications and the Fire Station would be less than
significant. Therefore, the construction of the proposed modifications and the Fire Station, as well as the operation
of the CDP as modified by the proposed modifications and the Fire Station, would not have a cumulative impact.
Greenhouse Gas Emissions
Global climate change is by definition a cumulative impact; a project participates in this potential impact through
its incremental contribution combined with the cumulative increase of all other sources of GHGs. Thus, GHG impacts
are recognized as exclusively cumulative impacts; there are no non-cumulative GHG emission impacts from a
climate change perspective (CAPCOA 2008). As described in the Seventh Addendum, the proposed modifications
would not have a cumulatively considerable contribution of GHG emissions during construction. Similarly,
construction of the Fire Station would be short term, occurring for up to four months, and thus would not result in
substantial GHG emissions. Therefore, the project modifications and the Fire Station would not result in a
cumulative impact.
As described in the Seventh Addendum, the CDP with incorporation of the proposed modifications would not have
a cumulatively considerable contribution of GHG emissions and would not result in a cumulative impact. As
described in the Seventh Addendum, the CDP’s GHG Plan requires Poseidon to demonstrate that the CDP has a
“net zero” impact on GHG emissions from indirect sources (electrical energy consumption). The operation of the
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7662 16 SEPTEMBER 2022
Fire Station would not result in substantial new GHG emissions, because the project involves the relocation of an
existing Fire Station, and GHG emissions associated with employee vehicles, Fire Station equipment, and building
energy are not expected to increase substantially as a result of that relocation. Therefore, the CDP, as modified by
the proposed modifications, and the Fire Station would not result in a cumulative impact.
Hazards and Hazardous Materials
The Final EIR for the CDP concluded that with adherence to applicable local, state, and federal regulations related
to hazardous materials use and disposal, short-term construction impacts of the CDP were less than significant.
The Seventh Addendum concluded that the proposed modifications would not result in any new or substantially
more severe impacts to hazards. Construction of the Fire Station could require relatively small amounts of
commonly used hazardous substances, such as gasoline, diesel fuel, lubricating oil, grease, and solvents. These
materials would be transported and handled in accordance with all federal, state, and local laws regulating the
management and use of hazardous materials. Consequently, use of these materials for their intended purpose
would not pose a significant risk to the public or environment. Once construction is complete, construction-related
hazardous materials would no longer remain on-site. In sum, the proposed modifications and the proposed Fire
Station would be subject to existing regulatory controls that would result in minimization of hazards. Therefore,
construction of the proposed modifications and the Fire Station would not contribute to cumulative considerable
increases in hazards or hazardous materials.
Operation of the CDP would require the use of cleaning chemicals and chemicals for water treatment. The CDP
would comply with all applicable laws and regulations to minimize the potential for a release of hazardous materials
and will conduct emergency response planning to address public health concerns regarding hazardous materials
storage. The chemicals will be delivered to the project site by truck, and will be stored in tanks that meet applicable
regulatory requirements. The tanks will be constructed of appropriate, non-reactive materials, compatible with the
recommendations of the supplier of the hazardous material. The operation of the Fire Station could use potentially
hazardous materials (e.g. fire suppressants). The hazardous materials used during operation of the Fire Station
would be used on site, transported to and from the site, and ultimately disposed of offsite. There is the potential
for a hazardous materials incident to occur, if hazardous substances are handled improperly or unsafely such that
the substance is released or the public is exposed to the substance. Handling of potentially hazardous materials
associated with the Fire Station are regulated by the Occupational Safety and Health Administration (OSHA) and
the California Occupational Safety and Health Administration (CalOSHA). Materials associated with Fire Station
operations would be stored on site per regulatory and industry procedures and transported off site by qualified
vendors, in accordance with applicable regulations. Compliance with applicable regulations involving hazardous
materials and potentially hazardous materials during operation of the Fire Station would ensure that such materials
are transported, used, and disposed in a manner that minimizes potential effects to the environment. Therefore,
operation of the CDP as modified by the proposed modifications and the Fire Station would not contribute to
cumulative considerable increases in hazards or hazardous materials.
Hydrology and Water Quality
Construction of the proposed modifications and the Fire Station have the potential to affect water quality due to
the presence of hazardous materials, oils, lubricants, and other materials that may be released and affect local
water quality. During construction, the Fire Station would control for stormwater pollution and erosion in a similar
way as the proposed modifications through implementation of construction BMPs (such as sediment screening,
filtration, and proper handling and storage of construction materials). It is reasonable to assume that the Fire
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7662 17 SEPTEMBER 2022
Station would comply with applicable construction stormwater and waste discharge requirements that would
minimize impacts to water quality. In addition, construction of the Fire Station would involve minimal ground
disturbance (for trenching for utilities only) and thus no change to the existing drainage pattern would occur.
Therefore, during construction, a cumulative impact to water quality and hydrology would not occur.
During operation, the Fire Station would not contribute to CDP-related operational water quality concerns, such as
screen cleaning and debris removal, which will be conducted in accordance with applicable regulatory
requirements. The Fire Station also would not have the potential to affect ocean water quality because it will not
have ocean discharges. Although operation of the Fire Station may contribute to pollutants in stormwater runoff
from new land uses, these pollutants would be typical of urban development, and it would be too speculative to
pinpoint the pollutant source once the stormwater runoff reaches the ocean. Therefore, the CDP as modified by the
proposed modifications and Fire Station would not result in a cumulatively considerable impact.
Land Use and Planning
The General Plan and zoning designations for the proposed modification and Fire Station site are as follows:
a. General Plan:
i. APN 210-010-49 (power plant property and a small portion of the lagoon): Visitor Commercial/Open
Space (VC/OS)
ii. APN 210-010-45 (lagoon): Open Space (OS)
b. Zoning:
i. APN 210-010-49: Public Utilities (P-U)
ii. APN 210-010-45: Open Space (OS)
The Local Coastal Program land use and zoning designations for the property are as follows:
a. Land Use: Public Utilities (U) and Open Space (OS)
b. Zoning: Public Utilities (P-U) and Open Space (OS)
The CDP, as modified by the proposed modifications, and the Fire Station would not contribute to significant
cumulative land use impacts of dividing an established community or conflicting with land use or environmental
policies. The CDP and the Fire Station are both located entirely within the boundaries of an existing utility site. The
proposed modifications and Fire Station would not involve or contribute to any land use designation changes within
the CDP site or surrounding area. Furthermore, the proposed modifications and the proposed Fire Station, would
be subject to the City’s existing regulations, plans, and land use planning standards. Therefore, the CDP as modified
by the proposed modifications and the Fire Station would not result in cumulative land use impacts.
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7662 18 SEPTEMBER 2022
Noise and Vibration
The project modifications and Fire Station would produce noise from the use of heavy equipment during
construction. An overlap of construction schedules could occur from October 2022 to January 2023. High
groundborne noise levels and other miscellaneous noise levels can be created by the operation of heavy-duty
construction equipment. Construction of the proposed modifications and the Fire Station would generate noise and
would temporarily increase noise levels at nearby sensitive land uses. However, noise impacts resulting from
construction depend on the noise generated by various pieces of construction equipment, the timing and duration
of noise-generating activities, and the distance between construction noise sources and noise-sensitive receptors.
Noise generation from construction of the proposed modifications and Fire Station would be temporary, and
intermittent. As described above, in Section 3.1, the City Municipal Code regulates construction noise by limiting
the hours of operation. Construction activities are allowed to occur Monday through Friday between the hours of 7
a.m. to sunset; and on Saturdays from 8 a.m. to sunset, excluding legal holidays. The City does not have quantitative
noise level limits (i.e., based on sound levels) for general nuisance noise such as that associated with stationary
equipment located on private property. Construction activities for the proposed modifications and the Fire Station
would be limited to the hours specified in the Municipal Code. Therefore, the project modifications and Fire Station
would not result in a cumulative impact from construction noise.
As demonstrated above, the construction of the proposed modifications would not result in a significant vibration
impact. Construction of the Fire Station would be of lower intensity and would require less equipment than the
construction of the proposed modifications; therefore, construction of the Fire Station is not expected to result in
vibration levels that would exceed the vibration levels of the proposed modifications. The closest sensitive receptor
to the proposed modifications and the Fire Station is 1,200 feet away (residential receptor located south of both
projects). Therefore, vibration associated with construction of both the proposed modifications and Fire Station are
not anticipated to be cumulatively considerable.
Operation of the CDP, as modified by the proposed modifications, would not result in any new significant sources
of noise when compared to the existing noise environment. The Fire Station would include operation of a handful
of employee vehicles and Fire Station equipment, which would be a negligible source of noise when considering the
industrial nature of the site. Additionally, the closest sensitive receptor to the proposed modifications and the Fire
Station is 1,200 feet away (residential receptor located south of both projects). A few additional vehicular trips
would not be audible from this distance. Further, as reflected in the City’s Fire Station approvals, the surrounding
area already experiences a regular flow of vehicles traveling on Carlsbad Boulevard and already experiences a noise
level of 60-70+ CNEL, and the Fire Station would not intensity the existing conditions. Thus, the operation of both
projects would not result in a cumulatively considerable noise impact.
Transportation and Traffic
Proposed modification construction would temporarily generate construction traffic that would be subject to the
approved traffic control plan provided as mitigation within the FEIR to ensure minimal disruption of nearby
roadways. The Fire Station would involve construction phase timing that could overlap with construction of the
proposed modifications. Pile driving associated with the proposed modifications could overlap with the Fire Station
construction. Pile driving would result in 40 daily worker trips, 10 daily vendor trips, and 3 haul trucks. The Fire
Station would likely involve less worker, vendor, and haul truck trips, as compared to the proposed modifications,
because the Fire Station is smaller scale, less intense, and involves installation of modular buildings to the project
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 19 SEPTEMBER 2022
site. Therefore, combined these two projects are expected to generate less than 100 maximum daily trips. The
construction traffic associated with both projects would represent a negligible incremental increase in traffic
volumes in the area and would not result in a cumulative impact.
Similarly, for operation, the Final EIR for the CDP concluded that operation of the CDP would not substantially impact
the surrounding circulation network and would not have significant traffic impacts. As discussed in the Seventh
Addendum, the proposed modifications would not result in a substantial change to trips associated with operation
of the CDP. Fire Station vehicle trips (associated with 7 staff members) would represent a negligible incremental
increase in traffic volumes in the area. The street system serving the Fire Station is designated by General Plan as
a “Coastal Street,” and is constructed with the capacity to support a variety of vehicles including emergency
vehicles. Therefore, operation of the CDP, as modified by the proposed modifications, and the Fire Station would
not result in a significant cumulative impact.
Public Services
The need for new or altered fire station and police station facilities, schools and parks is usually associated with
substantial population growth, such that existing facilities cannot meet the increased demand for these services.
The Final EIR for the CDP concluded that the CDP would not result in the need for additional public facilities or
services and would not contribute to considerable increases in demand for public services. As discussed in the
Seventh Addendum, the addition of the proposed modifications does not change that conclusion. The Fire Station
would require seven employees. This increase in employees would not result in significant population growth or
demand for additional public services. In addition, the Fire Station is required to comply with all federal, state, and
local ordinances, including the Zone 3 Local Facilities Management Plan, which regulates the Citywide buildout of
fire stations. Therefore, the CDP, as modified by the proposed modifications, and the Fire Station would not result
in a cumulatively considerable impact.
Utilities and Service Systems
The Final EIR concluded that the CDP would not result in increased wastewater production that would necessitate
additional wastewater treatment capacity. The CDP is now built and operating. The Seventh Addendum concluded
that the addition of the proposed modifications would not require additional services or utilities. The Fire Station
operation would result in an increase in approximately 7 employees to the former NRG site. This would only
minimally increase the water demand and wastewater generation and would not require any necessary
improvements to existing infrastructure serving the project site (other than interconnection to the existing systems).
The proposed modifications and Fire Station would not result in the need for additional water or wastewater
conveyance infrastructure. The addition of 7 new employees would not result in a significant increase in solid waste
generation and therefore would not exceed the capacity of local infrastructure. In addition, pursuant to the Fire
Station’s CUP conditions, the Fire Station must comply with all federal, state, and local ordinances, including the
City’s Zone 3 Local Facilities Management Plan, which regulates Citywide buildout of wastewater treatment, sewer
collection, and water distribution system. Cumulative impacts associated with the CDP, as modified by the
proposed modifications, and Fire Station would be less than significant.
Conclusion
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 20 SEPTEMBER 2022
The relocation of the Fire Station to the former NRG warehouse site and the potential overlapping construction of
the project modifications plus the Fire Station do not result in any new or more severe cumulative impacts than
previously disclosed for the CDP.
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 21 SEPTEMBER 2022
3 References
14 CCR (California Code of Regulations) 15000–15387 and Appendices A–L. Guidelines for Implementation of
the California Environmental Quality Act, as amended.
California Coastal Commission. 2022. Staff Report W8e (Application No. 6-22-0071).
https://documents.coastal.ca.gov/reports/2022/5/W8e/w8e-5-2022-report.pdf
Caltrans. 2020. Transportation and Construction Vibration Guidance Manual. Division of Environmental Analysis,
Environmental Engineering, Hazardous Waste, Air, Noise, Paleontology Office. Sacramento, California.
April 2020.
City of Carlsbad. 2006. Precise Development Plan and Desalination Plant Final Environmental Impact Report
(FEIR) (State Clearinghouse No. 200404181). Certified June 13, 2006.
https://www.carlsbaddesal.com/eir.html.
City of Carlsbad. 2013. Noise Guidelines Manual. July 2013.
https://www.carlsbadca.gov/home/showpublisheddocument/238/637425974092370000
City of Carlsbad. 2021. CUP 2021-0018 (PUB 2021-0013) – Temporary Fire Station No 7.
https://records.carlsbadca.gov/WebLink/DocView.aspx?id=6287361&dbid=0&repo=CityofCarlsbad&sea
rchid=f6d66335-1145-4050-bcb0-d2a0d93c8f41&cr=1
DOT (U.S. Department of Transportation). 2006. FHWA Roadway Construction Noise Model: User’s Guide. Final
Report. FHWA-HEP-06-015. DOT-VNTSC-FHWA-06-02. Cambridge, Massachusetts: DOT, Research and
Innovative Technology Administration. August 2006.
FHWA. 2008. Roadway Construction Noise Model (RCNM), Software Version 1.1. U.S. Department of Transportation,
Research and Innovative Technology Administration, John A. Volpe National Transportation Systems Center,
Environmental Measurement and Modeling Division. Washington, D.C. December 8, 2008.
FTA (Federal Transit Administration). 2018. Transit Noise and Vibration Impact Assessment Manual. FTA Report
No. 123. September.
Poseidon. 2020. Poseidon Operations Report provided to the San Diego County Water Authority (SDCWA).
Submitted May 2020.
Poseidon & SDCWA. 2022. Modified Intake Design response letter prepared for the Regional Water Quality
Control Board. Prepared by Poseidon and SDCWA. Submitted March 2, 2022.
SDCWA. 2016. Supplement to the Precise Development Plan and Desalination Plant FEIR (State Clearinghouse
No. 2015091060). Adopted August 25, 2016.
San Diego Regional Water Quality Control Board. 2020. Order No. R9-2019-0003 as amended by Order R9-2020-
0004 (NPDES No. CA0109223).
https://www.waterboards.ca.gov/rwqcb9/board_decisions/adopted_orders/2019/R9-2019-0003.pdf.
MEMORANDUM
SUBJECT: FOCUSED ANALYSIS FOR ALTERNATIVE 22 AND CITY OF CARLSBAD FIRE STATION PROJECT
7662 22 SEPTEMBER 2022
SWRCB. 2015. Amendment to the Water Quality Control Plan for Ocean Waters of California Addressing
Desalination Facility Intakes, Brine Discharges, and Other Non-Substantive Changes. April 24, 2015.
https://www.waterboards.ca.gov/water_issues/programs/ocean/desalination/docs/amendment/15042
4_finaldraftamendment.pdf.
SWRCB. 2019. Water Quality Control Plan for Ocean Waters of California, California Ocean Plan. Revised 2019.
https://www.waterboards.ca.gov/water_issues/programs/ocean/docs/oceanplan2019.pdf.
WRA Environmental Consultants (WRA). 2009. SAN DIEGO REGIONAL LAGOON OVERVIEW PHASE 1 PLANNING
STUDY. I-5 North Coast Corridor Project San Diego County, California Prepared by WRA with Aecom.
Prepared for Caltrans, District 11 and San Diego Association of Governments. December 2009.
SOURCE: Poseidon Channelside 2022Z:\Projects\j766201\MAPDOC\MAPS\Addendum6FIGURE 1
Proposed Modified Intake Design Site Plan
Focused Analysis for Alternative 22 and City of Carlsbad Fire Station Project
1
PROPOSED TEMPORARY FISH
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NOT FOR CONSTRUCTION
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GENERAL INFORMATION:
OWNER NAME:
Cabrillo Power I LLC
OWNER ADDRESS:
4590 Carlsbad Blvd., Carlsbad, CA 92008
OWNER PHONE NUMBER: 760-268-4010
DEVELOPER NAME:
Poseidon Resources (Channelside) LP
DEVELOPER ADDRESS:
4590 Carlsbad Blvd., Carlsbad, CA 92008
DEVELOPER PHONE NUMBER:
760-655-3900
ENGINEER NAME:
Curtis Gauthier (DM) / Steve Friedman (PM)
ENGINEER ADDRESS:
"1t.,. •• HDR lrivine, 3230 El Camino Real, Suite
200, Irvine, CA 92602-1377
ENGINEER PHONE NUMBER:
714-730-2321 / 714-368-5634
PREPARED DATE: 07/01/22
PROJECT NAME:
Carlsbad Desalination Plant's Intake and
Discharge Modifications
D
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CUP 2022-0010
SUP 2022-006
PROPOSED 72-INCH
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ACCESSOR PARCEL NO(S):
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210-010-49
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PHASE 2 CONSTRUCTION W/ GRADING PERMIT
FOR FIRE DEPARTMENT PARKING /
/
EXISTING 72-INCH FEEDER (TO BE ( / /
/
ABANDONED UP TO PROPOSED
( (
PHASE 1 INCLUDES LAGOON DREDGING AND PILE BINSTALLATIONS ONLY-NO GRADING PERMIT
1.TEMPORARY ACCESS RAMP ONCARLSBAD BLVD.CONNECTION VAULT) \ . . I . EXISTING FOREBAY (TO BE \I DEMOLISHED/ABANDONED)
EXCAVATION -32 CY
BACKFILL -63 CY
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SLURRY FILL -2,830 CY
4.SITE UTILITIES (PIPE/ELEC):
EXCAVATION -2,200 CY
BACKFILL -2,100 CY
5.ELECTRICAL BUILDING:
BACKFILL --650 CY
6.BULKHEAD/TIE-IN VAULTS, 72"-FEEDER,
DEBRIS SORTING STATION:EXCAVATION --3,900 CY
BACKFILL -3,200 CY
TOTAL DISTURBED AREA (LAND): 43,560 SOFT (1.0 ACRE)
TOTAL NEW AND/OR REPLACED
IMPERVIOUS SURFACE AREA:
38,766 SOFT (0.89 ACRE)
(9 POSEIDON CHANNELSIDE CIVIL OVERALL SITE PLANNICINITY MAP
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SEE 01S34
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SCALE:1/8"=1'
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Confirmed by Second Amended and
Restat:d Ground Lease and
Ease merit Agreement, Apr 07, 2010
confirmed by second Amended and
Restat2d Ground Lease and
Ease merit Agreement, Apr 07, 2010
confirmed by Eleventh Amenclment
to second Amended and Restated
Ground Lease and Easement
Agreement, Feb 19, 2018
Confirmed by Eleventh Amendment
to Second Amended and Restated
Ground Lease and Easement
Agreement, Feb 19, 2018
Cabrillo Power I, LLC approval in
concept, Lease Amendment under
review with executio11 expected in
Sep 2022)
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Pump Station (Channel,ide) LP
Cormection Eas.emient Area Cabrillo Power I, LLC Poseidon R�s.ournes
(Channel,ide) LP
Seawater Intake Outfall Poseidon R�s.ournes
Easement Area Cabrillo Power I, LLC (Channel�ide) LP
Lagoon Intake Eas.ement Area Cabrillo Power I, LLC Poseidon R�s.ources
(Channel,ide) LP
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19+50 20+00
CARLSBAD BOULEVARD CURB PROFILE
PROFILE
HORIZ SCALE: 1"=20' VERT SCALE: 1"=4'
20+50 21+00
--------------------SOUTH DRIVEWAY
STA 18+90.35 = STA 30+00.00 -18+00-
EXISTING ROW
EXISTING BACK OF WALK f--------SHO :___----1-----r;
EXIST,ING POWER POLE PROTECT IN PLACE
EXISTING GATE
TO CARLSBAD DESALINATION PLANT
PROPERTY LINE
- -
ISSUE DATE
-19+00-
-
DESCRIPTION
_ 20+0(l_
-1-
�=-PARALLEL PARKING ---,,..._ AREA (SHOWN FOR _ ILLUSTRATIVE PURPOSES ONLY) -r
ACCESS ROAD
LAGOON
PLAN
SCALE: 1 "=20'
PROJECT MANAGER S. FRIEDMAN
DESIGNED BY
CHECKED BY
DRAWN BY
PROJECT NUMBER 10341720
'-'-11 I I
5 6
CARL -BAD BLVD
7 8
CONSTRUCTION NOTES
1.INSTALL SIDEWALK PER SDRSD G-7
2.PROPOSED 4" AC OVER 4" CLASS II BASE (SEEGENERAL NOTES 4 & 5)
•:
3.SAWCUT AND REMOVE EXIST A.G. PAVEMENT ANDBASE. JOIN EXISTING PAVEMENT TO NEWPAVEMENT PER DETAIL 1
30+00
_ 21+0Q_
I
50'ROW
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ACCESS ROAD LAGOON
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I I I I I I I I I
30+50 31+00
SOUTH DRIVEWAY CENTERLINE PROFILE
PROFILE
HORIZ SCALE: 1 "=20' VERT SCALE: 1 "=4'
NOTE
10�
I 4• I 8'
GREEN PAINT
UP OF GUTTER
6" DASHED WHITE LINE
1.GREEN PAINT SHALL HAVE CHROMATICTY COORDINATES PER FHWA INTERIM APPROVAL1A-14. GREEN PAINT SHALL BE EF SERIES WB GRN FAST DRY 1952F 1/2, PRODUCT CODE183, PRODUCT COLOR GREEN (34-108) BY ENNIS-FLINT OR APPROVED EQUAL. PAINT SHALLMEET FEDERAL SPEC. TT-P-1952F TYPE I AND II.
,' 2 " DASHED GREEN BIKE LANE DETAIL
\. � SCALE: NTS
MIN 2' WIDE MILL AND OVERLAY TO JOIN EXISTING
SAWCUT LINE
4.REMOVE EXISTING CURB AND GUTTER ANDSIDEWALK TO NEAREST JOINT. INSTALLTEMPORARY DRIVEWAY PER SDRSD G-14D
5.SANDBLAST EXIST PAINT AND PAINT NEW TOUPDATED TRAFFIC PATTERN
6.INSTALL PROPOSED CHAIN LINK FENCE AND GATESPER SDRSD M-5 AND M-6. JOIN EXIST FENCE
7.PROPOSED 4" CLASS II BASE OVER COMPACTEDNATIVE SOIL (SEE GENERAL NOTE 1)
8.REMOVE INTERFERING PORTIONS OF EXISTBARBED WIRE FENCE TIE-IN EXIST FENCE TO NEWGATE
9. INSTALL FULL DEPTH AC PAVEMENT (8" MINIMUM)
10.INSTALL 50 LF OF DASHED GREEN BIKE LANE INFRONT OF RAMPS PER DETAIL 2, THIS SHEET.
GENERAL NOTES
1.MAINTAIN ACCESS TO EXISTING FISH FARMDURING CONSTRUCTION ACTIVITIES WITHTEMPORARY DRIVEWAYS. AT THE CONCLUSION OFPROJECT CONSTRUCTION ACTIVITIES, RESTOREAREA TO PRE-CONSTRUCTION CONDITIONS.
2.CONTRACTOR SHALL PROPERLY DOCUMENTEXISTING CONDITIONS, PRIOR TO ANYCONSTRUCTION, TO ENSURE ACCURATERESTORATION TO PRE-CONSTRUCTIONCONDITIONS AT THE CONCLUSION OF THEPROJECT CONSTRUCTION ACTIVITIES.
3.INSTALL CONSTRUCTION BMPS PER EROSIONCONTROL SHEET.
4.CONTRACTOR SHALL LOCATE EXISTINGIRRIGATION SYSTEM AND RELOCATE INTERFERINGPORTIONS AS NEEDED TO MAINTAIN IRRIGATIONSERVICE TO SLOPE AREAS.
5.PRIOR TO PLACEMENT OF FILL AND PAVEMENTSECTION, LOOSE AND DRY SOILS SHOULD BEREMOVED TO COMPETENT BOTTOM. WHERE THEGROUND SURFACE SLOPES STEEPER THAN 5:1(HORIZONTAL:VERTICAL), THE GROUND SHOULDBE STEPPED OR BENCHED.
--------------------FINISHED GRADE LANE STRIPING
�; - a::"'w"--: >0 0
EXISTING PAVEMENT SECTION PROTECT IN PLACE RECOMPACT TO 90% RELATIVE COMPACTION
NEW PAVEMENT SECTION
0
PROPERTY BOUNDARY
P-U ZONE
OS ZONE
SCALE: 1 "=20'
20 40 60 , j " TYPICAL JOINT DETAIL TO EXISTING PAVEMENT SCALE: 1 "=4'
1 '-,_ SCALE: NTS ......_____,
(9, POSEIDON CHANNELSIDE
a Poseidon Water company
CARLSBAD DESALINATION PLANT PHASE 2 INTAKE MODIFICATIONS PRELIMINARY DESIGN
0
0
CIVIL
4 8 12
FISH FARM TEMPORARY DRIVEWAY (SOUTH) PLAN AND PROFILE
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-. - • SCALE: 1"=5'
SECURITY FENCE . rns,1,oG�el --/ ' r EXISTING
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'2 �. DEBRIS SORTING STATION PROFILE
-
DATE
-. -, 1 SCALE: 1" = 5' HORIZ. 1" = 5' VERT.
-
DESCRIPTION
PROJECT MANAGER S FRIEDMAN
DESIGNED BY
CHECKED BY
DRAWN BY
PROJECT NUMBER 10341720
I
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------------
PROPOSED '�
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RETAINING
WALL
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BAR SCREEN
6
3
POST AND CHAIN
',.1 , •
MICROPILES
14'
-------"
SECTION VIEW
SCALE: 1" = 5'
{Qi POSEIDON CHANNELSIDE
a Poseidon Water company
CARLSBAD DESALINATION PLANT PHASE 2 INTAKE MODIFICATIONS PRELIMINARY DESIGN
7
----------.----' ' ' ,' . ,. '--'--�-
RAILINGS
'•«,
DRAIN GROOVES
INLET TROUGH
PLATES
8
CONSTRUCTION NOTES @
1.NOT USED
2.INSTALL TRASH RAKE MONORAIL
3.INSTALL OVERHEAD CLEARANCE WARNING SIGN
4.INSTALL 16" PVC OUTLET LINE
5.INSTALL SECURITY FENCE
6.INSTALL CAST-IRON TROUGH PLATE ACROSSROADWAY SECTION
7.INSTALL BAR SCREENS
8.INSTALL DRAIN GROOVES
9.INSTALL REMOVABLE PLATE STOPPERS
10.NOT USED
11.INSTALL OVERFLOW NOTCH
CIVIL DEBRIS SORTING STATION PLAN AND SECTIONS
0 1" - -2" FILENAME 01 C01.dwg ---
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DESIGNED BY CHECKED BY DRAWN BY {Qi POSEIDON CHANNELSIDE
PROJECT NUMBER 10341720
a Poseidon Water company
CARLSBAD DESALINATION PLANT PHASE 2 INTAKE MODIFICATIONS PRELIMINARY DESIGN
I I I
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PROPOSED RETAINING WALL TO MAINTAIN ACCESS TO EASTERN DOCK. RETAINING WALL TO MATCH APPEARANCE OF EXISTING ELECTRICAL BUILDING RETAINING WALL; DESIGN CURRENTLY UNDER DEVELOPMENT
-------
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0
CIVIL
8
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SCALE: 1"=10'
10 20 30
EAST AND WEST RAMP GRADING PLAN
0 1"- -2" FILENAME 03C01.dwg ---SCALE AS NOTED SHEET
03C01
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Photo Shoot from the east berm of the discharge pond located on NRG property.
Visual Simulation: Southern View from Agua Hedionda Lagoon TrailSeventh Addendum to the Precise Development Plan and Desalination Plant Project Final Environmental Impact ReportFIGURE 5AZ:\Projects\j766201\MAPDOC\MAPS\Addendum6
Visual Simulation: Southern View from Carlsbad BoulevardSeventh Addendum to the Precise Development Plan and Desalination Plant Project Final Environmental Impact ReportFIGURE 5BZ:\Projects\j766201\MAPDOC\MAPS\Addendum6
Visual Simulation: Southern View from Agua Hedionda LagoonSeventh Addendum to the Precise Development Plan and Desalination Plant Project Final Environmental Impact ReportFIGURE 5CZ:\Projects\j766201\MAPDOC\MAPS\Addendum6