HomeMy WebLinkAboutEIR 03-05; PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT; 6TH ADDENDUM TO THE PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT; 2019-02-01
SIXTH ADDENDUM
PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT
FINAL ENVIRONMENTAL IMPACT REPORT (EIR 03-05)
CITY OF CARLSBAD, CALIFORNIA
State Clearinghouse Nos. 2004041081/2015091060
EIR Certified June 13, 2006
SEIR Certified August 25, 2016
Prepared for:
San Diego County Water Authority
4677 Overland Avenue
San Diego, California 92123
Prepared by:
Dudek
605 Third Street
Encinitas, California 92024
February 2019
Precise Development Plan and Desalination Plant Proposed Project
Sixth CEQA Addendum i February 2019
TABLE OF CONTENTS
Section Page No.
1.0 INTRODUCTION/PROJECT BACKGROUND ................................................................ 1
2.0 CEQA REQUIREMENTS ................................................................................................... 2
3.0 PROJECT LOCATION AND REGIONAL SETTING ...................................................... 4
4.0 DESCRIPTION OF APPROVED PROJECT ..................................................................... 5
5.0 DESCRIPTION OF PROPOSED MODIFICATIONS TO THE APPROVED PROJECT .. 5
6.0 REQUIRED ACTIONS ..................................................................................................... 14
7.0 IDENTIFICATION AND ANALYSIS OF ENVIRONMENTAL EFFECTS .................. 15
8.0 CUMULATIVE IMPACTS ............................................................................................... 44
9.0 GROWTH-INDUCING IMPACTS................................................................................... 49
10.0 CONCLUSION .................................................................................................................. 49
11.0 REFERENCES .................................................................................................................. 50
Appendix
A Air Quality and Greenhouse Gases
Figures
1 Project Location .................................................................................................................51
2 Proposed Modifications Location ......................................................................................52
3 New Active WWS Intake Site Plan ...................................................................................53
4 New Passive WWS Intake Site Plan ..................................................................................54
5 Alternative New Fish-friendly Pumping Station ...............................................................55
6 Poseidon Fish Beach Easement .........................................................................................56
Tables
1 CDP Process Water Use with Various Recovery Rates .......................................................8
2 Estimated Maximum Daily Construction Emissions (pounds per day) .............................21
3 Estimated Maximum Daily Operational Emissions (pounds per day)...............................22
4 Estimated Annual GHG Emissions (total metric tons) ......................................................23
5 Construction Equipment Noise Emission Levels ..............................................................38
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1.0 INTRODUCTION/PROJECT 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 has previously been analyzed under CEQA in the
Carlsbad Precise Development Plan and Desalination Plant Final Environmental Impact Report
(FEIR) for the CDP, which was certified by the City of Carlsbad (City) on June 13, 2006 (City of
Carlsbad, 2006). The FEIR analyzed a 50 million gallon per day (MGD) seawater desalination
plant and off-site 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 (SCH #2015091060) to evaluate
changes to the CPD intake and discharge system that would facilitate permanent stand-alone
operation of the CDP and the potential to increase the maximum daily production of the CDP from
54 MGD to 60 MGD in the future due to technological water processing improvements. 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.
Since certification of the Supplemental EIR, the project proponent in collaboration with the
SWRCB and San Diego Regional Water Quality Control Board (RWQCB) during the project’s
subsequent permitting with RWQCB identified design modifications to the CDP intake and
discharge system that will further reduce biological impacts identified in the Supplemental EIR.
The proposed modifications are required by the SWRCB and RWQCB to further reduce the
environmental impacts of the approved project on marine life, in compliance with the Desalination
Amendment. It is these proposed modifications that are the subject of this Sixth Addendum that
the RWQCB, as a Responsible Agency, will further evaluate pursuant to CEQA Guidelines
§15096 (f) and (g). The modifications include relocating (from on shore to submerged in the Agua
Hedionda Lagoon) and altering the intake screening system; changes to the intake and discharge
tunnels, the discharge pond and channel and auxiliary facilities; relocating the fish friendly intake
pumping structure, and implementing a pilot intake program (pilot project) to test the design
modifications effectiveness (proposed modifications) prior to finalizing the design and
construction of the full scale intake facilities.
This Sixth Addendum includes a discussion of the CEQA Requirements for an addendum (Section
2.0), details regarding the project location (Section 3.0), a description of the previously approved
project (Section 4.0), a description of the proposed modifications to the previously approved project
(Section 4.0), a description and purpose for each of these modifications (Section 5.0), the Water
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Authority actions required to approve these proposed modifications (Section 6.0), and an analysis of
the potential impacts of the proposed modifications (Sections 7.0 through Section 10.0).
2.0 CEQA REQUIREMENTS
As specified in CEQA Guidelines Section 15096, Responsible Agencies are required to comply
with CEQA when taking their respective discretionary actions regarding a project, and CEQA
provides that they may rely on a CEQA document prepared by the Lead Agency to meet this
requirement. However, they must independently consider the CEQA document, and not just rely
on the Lead Agency’s findings: “A Responsible Agency complies with CEQA by considering the
EIR or negative declaration prepared by the Lead Agency and by reaching its own conclusions
on whether and how to approve the project involved.” [State CEQA Guidelines §15096(a)] and
“Prior to reaching a decision on the project, the responsible agency must consider the
environmental effects of the project as shown in the EIR or negative declaration.” [State CEQA
Guidelines §15096(f)].
CEQA also provides for the Responsible Agency’s adoption of alternatives or mitigation
measures: “A responsible agency has responsibility for mitigating or avoiding only the direct or
indirect environmental effects of those parts of the project which it decides to carry out, finance,
or approve.” [State CEQA Guidelines §15096(g)(1)] and “When an EIR has been prepared for a
project, the Responsible Agency shall not approve the project as proposed if the agency finds any
feasible alternative or feasible mitigation measures within its powers that would substantially
lessen or avoid any significant effect the project would have on the environment.” [State CEQA
Guidelines §15096(g)(2)].
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 Lead 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:
(a) When an EIR has been certified … 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:
1. Substantial changes are proposed in the project which will require major revisions of the
previous EIR…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 previous EIR … due to the
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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 previous EIR was
certified as complete…shows any of the following:
(A) The project will have one or more significant effects not discussed in the previous EIR;
(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.
Alternatively, where some changes or additions are necessary to the previously certified EIR, but
none of the changes or additions meet the standards as provided for a subsequent EIR pursuant
to CEQA Guidelines, Section 15162, then the lead or responsible agency is directed to prepare
an addendum to the FEIR. (CEQA Guidelines, Section 15164). Further, the addendum should
include a “brief explanation of the decision not to prepare a subsequent EIR pursuant to Section
15162,” and that “explanation must be supported by substantial evidence.” (CEQA Guidelines,
Section 15164(e)). The addendum need not be circulated for public review, but may simply be
attached to the FEIR (CEQA Guidelines, Section 15164(c)).
This Sixth 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. The CEQA Guidelines allow the preparation of an addendum to
an EIR under the following circumstances (14 CCR 15000 et seq.):
1. Only minor technical changes or additions are necessary to make the EIR under
consideration adequate;
2. The changes and additions to the EIR do not raise important new issues about significant
effects on the environment;
3. None of the conditions described in Section 15162, CEQA Guidelines, calling for the
preparation of a subsequent EIR have occurred.
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3.0 PROJECT LOCATION AND REGIONAL SETTING
The proposed Project modifications including the pilot project are located in the City of Carlsbad
in the northern portion of San Diego County, California (Figure 1, Project Location). Other
components of the approved project, including pipelines located in the City of Carlsbad, the City
of Vista, and the City of San Marcos. The project site is located on the Encina Power Station
(EPS) site and within the Agua Hedionda 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 Agua Hedionda Lagoon.
Land uses surrounding the project site area 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; Interstate 5 (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. As noted above, the NCTD railroad tracks bisect the Precise
Development Plan (PDP) area. Also to the north, adjacent to the outer lagoon is the Hubbs-Sea World
Research Institute and fish hatchery (HSWRI). 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.
Agua Hedionda 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. For geographic reference
the lagoon is subdivided into the outer lagoon which is west of the NCTD railroad tracks, the
middle lagoon which is bound by the NCTD railroad tracks on the west and I-5 on the east, and
the inner lagoon which is east of I-5. 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 agricultural fields occupy a portion of the slopes along
the southern shoreline. The middle and inner 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 lagoon, where the intake facilities would be located, also 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.
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 Boulevard. The neighborhood west of Carlsbad Boulevard is referred
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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.
4.0 DESCRIPTION OF APPROVED PROJECT
The “approved project” consists of the various actions described and analyzed in multiple,
previously-approved documents: the FEIR, First through Fifth Addenda, and the Supplemental
EIR. The approved project includes construction and permanent stand-alone operation of the
CDP with the potential for producing a maximum daily of 60 MGD of product water, water
conveyance infrastructure, and other ancillary facilities required for operation of the CDP and
distribution of the product water.
The approved on-site facilities include the CDP, pump station, modifications to the existing
EPS intake structure, a new intake/discharge system that has not yet been constructed, and
other facilities such as electrical buildings and conveyance pipelines needed for operation of
the CDP. The approved project also includes off-site improvements such as pump stations,
flow control facilities, conveyance pipelines, minor changes to the Twin Oaks Valley Water
Treatment Plant, pipeline relining, and accessory facilities required to operate these facilities.
The intake/discharge system that was approved in the Supplemental EIR has yet to be
constructed and includes a new screening/fish-friendly pumping structure, a fish return
system, and auxiliary facilities. Proposed modifications to this system are the subject of this
sixth addendum and are described in Section 5.0 below.
5.0 DESCRIPTION OF PROPOSED MODIFICATIONS TO THE
APPROVED PROJECT
Since December 14, 2015, the CDP has been operating and permitted to produce up to 56,000 acre
feet per year (AFY) equivalent to 50 MGD average flow of desalinated water while operating in
conjunction with the EPS by using the power plant’s cooling water discharge as its feedwater. As
analyzed in the Supplemental EIR, the rated capacity of the approved project could also be increased
from a maximum daily of 54 MGD to a maximum daily of 60 MGD due to membrane technology
advances since original project approvals. The Supplemental EIR also included a new screening/fish-
friendly pumping structure, a fish return system, and auxiliary facilities that were approved, but not
constructed as of the time of this analysis. The retirement of the EPS at the end of 2018 results in the
need to retrofit the Desalination Plant for a transition to permanent stand-alone operation and for
compliance with the Desalination Amendment.
After certification of the Supplemental EIR by the Water Authority, additional alternatives were
developed to optimize design and placement of the intake improvements with respect to their
ability to further reduce impacts on marine life. The proposed modifications are required by the
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SWRCB and RWQCB to reduce the environmental impacts of the approved project on marine
life, in compliance with the Desalination Amendment. The RWQCB as a Responsible Agency, in
coordination with the project proponent (Poseidon Resources (Channelside) LP), evaluated over
20 different intake and discharge alternatives for the approved project to further minimize
environmental impacts and comply with the Desalination Amendment. Alternative 21 was selected
for further evaluation by the RWQCB, and pursuant to CEQA Guidelines §15096 (f) and (g), the
proposed modifications resulting from the implementation of these design changes are analyzed
in this Sixth Addendum. These design modifications are necessary to comply with the
Desalination Amendment requirement to use the best available site, design, and technology to
minimize the intake and mortality of all forms of marine life and to obtain a National Pollutant
Discharge Elimination System (NPDES) permit.
Pilot Project
Currently the existing data on narrow-slot wedge wire screens (WWS) does not include
adequate operational data to assess the performance and reliability in an estuarine/marine
environment similar to Agua Hedionda Lagoon. Therefore, the purpose of the pilot project
component is to confirm the design, operation, and maintenance requirements for WWS as the
intake technology for the permanent stand-alone operation of the CDP in the lagoon. The pilot
project will provide data on the capabilities of each WWS technology to manage free-floating
debris and biofouling in the lagoon.
The pilot project would be located near the existing intake for the approved project or alternatively
across the lagoon in conjunction with the HSWRI. Operating for approximately 2 years, the pilot
project will be designed as a simultaneous, side-by-side evaluation of two WWS intake types with
two different cleaning methods for a combination of three different types of WWS types being
evaluated. After one year, one of the WWS will be replaced with the untested WWS for evaluation.
The 1-mm slot width WWS that will be studied are: 1) passive stainless steel WWS (horizontal
orientation) with an airburst cleaning system 2) active (rotating) stainless steel WWS (vertical
orientation) equipped with an airburst cleaning system and 3) passive copper nickel WWS
(horizontal orientation) without a cleaning system.
The pilot system will intake up to 1.73 MGD of seawater with a through screen velocity of 0.5 feet
per second or less, consistent with the requirements in the Desalination Amendment. If connected
to the HSWRI intake system, HSWRI will use the feedwater for their needs and then as permitted
will discharge up to 2.16 MGD of seawater back into Agua Hedionda Lagoon. Two intake type
screens would be connected by new high density polyethylene (HDPE) pipeline of approximately
12-inches in diameter and 1,500 feet in length extending from the existing HSWRI lagoon intake
pumping system. In addition, valves will be installed on the two new pipelines and on HWRSI
existing intake to allow for operational flexibility. The existing HSWRI pump station would be used
to operate the two WWS screens and may be modified to increase operational flexibility of the
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pilot project. The compressor and receivers for the airburst cleaning systems would be located
onshore with air piping delivering compressed air to the WWS intake offshore. A generator may
also be required to power the compressor. The generator may be gasoline or diesel powered, or
may be powered by electricity from the grid. If the pilot project is established without a connection
to the HSWRI, the pilot facility would discharge using one of two alternatives methods: 1) into the
discharge pond; and 2) directly to the lagoon. Construction of the pilot project may take up to 6
months and would include the following phases:
HDPE piping would be outfitted with concrete ballasts and laid on the lagoon floor with the
assistance of barges, cranes, and divers.
Divers would attach the WWS assemblies to the HDPE piping under water.
Pump station and piping modifications would take place on land at HSWRI.
The pilot project would be operated over a two year period to ensure that the WWS performance
is evaluated under both seasonal and inter-annual variations in lagoon conditions comparing
scaled-down versions of both passive and active screen options for the new intake system. The
passive screen would be airburst based on the vendor-recommended frequency (once/day) and
the active screen would be rotated based on the vendor-recommended frequency (rotated for two
minutes twice a day in each direction).
Intake/Discharge Design Modifications
In general, the proposed modifications for the approved permanent standalone intake/discharge
system would include 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 improvements to the existing EPS intake and discharge tunnels, discharge
pond and channel (see Figure 2, Proposed Modifications Location).
Submerged WWSs in the Agua Hedionda Lagoon will be located approximately 900 feet from the
existing EPS intake tunnel and connected to new pipelines that would direct seawater to the
existing EPS intake tunnels (see Figure 3, New Active WWS Intake Site Plan, and Figure 4, New
Passive WWS Intake Site Plan). The CDP process and dilution water of 299 MGD would pass
through the submerged intake screening system and the existing intake pump station would
continue to deliver the process feedwater (up to 127 MGD) to the CDP for processing through the
pre-treatment and reverse osmosis 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, etc., 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
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operator adjusts the flows between the RO brine discharge and backwash waste streams to
optimize the efficiency and effectiveness of plant operations as seen in the following Table 1:
Table 1
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
1 RO Brine Discharge rate is derived as follows: Product Water / Recovery Rate = Intake Seawater Required then, Intake Seawater Required
– Product Water = RO Brine Discharge (eg. 60 MGD/0.48 = 125 MGD, then 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 the 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 SEIR:
The maximum daily average intake flow is 299 MGD;
The maximum combined discharge flow (RO brine and backwash) is 67 MGD;
The salinity of the combined discharge is between 64 to 67 ppt;
The maximum salinity in the discharge pond after mixing with the dilution water from the
flow augmentation system is 42 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 design of different components of the proposed modifications is described below in
additional detail.
WWSs
The WWS intake system would have a maximum intake capacity of approximately 299 MGD, with
1- mm slot widths and a through-slot velocity that would be designed for 0.5 feet per second or
less for compliance with the Desalination Amendment. The individual WWS unit could be
procured with either active or passive cleaning capabilities that would be determined based on
the results of the pilot project. Active screens provide mechanical cleaning while passive screens
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contain no mechanical components. Both types of screens would be designed to meet the
Desalination Amendment requirements and constructed similarly.
If the active WWS intake system is installed it would consist of a total of 16 rotating WWS units
and 4 pipelines, also referred to as intake laterals. Four of the sixteen, 108-inch diameter by 10-
feet tall WWS units would be mounted vertically on risers to a single header which is connected
to a single pipeline. A total of four separate pipelines (with 4 WWSs connected to each individual
pipeline and header) are generally oriented north to south.
Similarly, if the passive WWS intake system is installed it would consist of a total of 16 static WWS
units and 4 pipelines. Four of the sixteen, 78-inch diameter by 20-feet long WWS units would be
mounted horizontally on risers to a single header which is connected to a single pipeline. A total
of four separate pipelines (with 4 WWSs connected to each individual pipeline and header) are
generally oriented north to south.
The screens will either be fabricated from super-duplex stainless steel or copper nickel. Passive
screens would be cleaned regularly by divers to control biofouling on the screens. Active rotating
screens (powered by a motor) are equipped with a brushing mechanism and would most likely
require less cleaning of biofouling on the screens.
An airburst system (if required) would be used to attempt to dislodge debris that may collect
on screens. The airburst system would consist of two receiver tanks (5,000 to 10,000 gallons)
that are approximately 12 feet high and located north of the discharge pond, two air
compressors located within a new structure (approximately 16 feet wide, 24 feet long, and 12
feet high) near the new pump station, and conveyance piping. If active screens are utilized
based on the results of the pilot project, the proposed modifications may not require the use
of an airburst system for debris cleaning.
In addition to the airburst system, a floating debris/boom curtain around the intake screens to
block floating debris from entering the screening area. The floating debris boom would extend
from the surface of the lagoon to approximately 3 to 5 feet below the surface of the water and
would be anchored with concrete blocks. The floating debris boom would be a solid barrier to
avoid any marine life impacts and would also serve as stand-off zone to prevent unauthorized
access to the screened area, while allowing maintenance vessels to access the area through an
adjustable entrance/exit. Public access to the outer lagoon area, beyond the shoreline is currently
prohibited. As such, the portion of the lagoon outside of the screened intake area that was
previously open to the public will remain open.
Intake Laterals
The intake system will be comprised of four 88-inch diameter intake lateral that are each
approximately 900 feet long, extending out into the lagoon from the existing intake location. Installation
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of the HDPE lateral would involve trenching of the lagoon floor and the assembled pipe would be
floated into place. The intake system would be ballasted with concrete collars (that would also serve
to anchor the pipe to the lagoon floor), and finally the pipe would be flooded with seawater to submerge
the pipe on the lagoon floor. Overtime, the trenched area will naturally backfill.
The offshore end of each lateral would include a 100 foot long, 88-inch diameter super duplex
stainless steel header. Each header will include riser connections for the four WWS units (as
described above). The trash racks at the existing intake forebay would be removed and the
four laterals would be connected into the existing intake structure such that the intake would
only be able to withdraw water from the laterals. Each of the laterals would be equipped with
an access port on the upstream end to accommodate cleaning and maintenance (see lateral
maintenance discussion).
Fish-Friendly Pumping Structure
The Fish-friendly Pumping Structure as evaluated in the Supplemental EIR would be relocated to
an existing vault adjacent the intake and discharge tunnels or if during the design phase the vault
is found to be unsuited for the Fish-friendly Pumping Structure, the structure will be located
adjacent to the EPS discharge tunnel approximately 100 feet south of the existing EPS lagoon
inlet (see Figure 5, Alternative New Fish-friendly Pumping Station). The existing vault area must
be further evaluated for structural capabilities for relocating the pumping station. A total of three
axial flow submersible pumps would be installed with two in service and one serving as a backup.
The submersible pumps will be placed within the pump station vault. The discharge piping from
the submersible pumps would be located above grade for a short distance then turning downward
into the below grade discharge tunnel leading to the discharge pond. The pumps would be similar
to those described in the Supplemental EIR to reduce the potential mortality of marine life passing
through the system.
Interconnection Pipelines and Existing EPS Tunnel, Discharge Pond and
Channel Modifications
The CDP’s intake and discharge connection points to existing EPS intake and discharge tunnels
would be relocated to accommodate stand-alone operations with the proposed modifications.
After relocating the connecting points, the EPS intake and discharge tunnels would be sealed off
just south of the relocated CDP intake pump station connection point. To enhance turbulence for
a more rapid ocean mixing, 5 ton quarry stone (or similar methodology to enhance mixing) may
be placed on the EPS discharge channel bottom at the landward side between Carlsbad
Boulevard bridge and the mean high tide line (Jenkins, 2018).
In addition, a barrier, (i.e., sheetpile wall, stacked concrete blocks, or similar) would be
constructed in the pond to enhance mixing and to function as a collection area for debris
originating from WWS intake system maintenance.
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Construction Schedule
The EPS decommissioning occurred on December 11,,2018. The transition to CDP stand-alone
operation involves: 1) continued use of the EPS screens and pumps while constructing the Fish-
friendly pumping station (Interim Improvements) and the pilot project; 2) operation of the EPS
screens in conjunction with the fish-friendly dilution pumps, while the WWS intake system is
constructed and the interconnection pipelines and EPS tunnels are modified (Permanent
Improvements); and 3) operation of the permanent standalone intake and discharge modification
for the Desalination Plant.
As a result, construction of the proposed modifications would occur in two separate phases with the
first phase focused on construction of the fish-friendly pump station and pilot project and the second
phase would install the new WWS intake system. The first phase of construction for the fish-friendly
pump station and pilot project is estimated to begin in the mid-2019 and last for approximately 6
months. The second phase of construction for the new WWS intake system is anticipated to start at
the beginning of 2023 and last approximately one year. The following general construction sub-
phases would be required for construction of the proposed modifications:
Construction - Phase 1 (Interim Improvements): Fish-friendly pump station and the pilot project
Fish-friendly pump station:
o Mobilization
o Site Preparation
o Demolition of portions of the existing forebay and intake vault area and creation of
intake area to accommodate new pump station.
o Installation of the new pump station adjacent to the existing pump station area,
including electrical facility to power the pump station.
o Connection of the new brine line from the intake area to the pump station area.
o Sealing of the discharge tunnel.
Installation of a temporary physical barrier (i.e., concrete blocks or similar) in the discharge
pond for enhanced mixing.
Pilot project:
o Option 1 - Modifications to the existing HSWRI pump station, as necessary, and installation
of the WWS intake system pilot project offshore of the HSWRI pump station.
o Option 2 – Connection of the WWS intake system pilot project to a new pump station
on the existing CDP site and installation of the WWS intake system pilot project
offshore of the EPS Intake.
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Construction - Phase 2 (Permanent Improvements): WWS Intake System, Intake and Discharge
Tunnel, Discharge Pond and Channel Modifications
Mobilization.
Trenching of the lagoon floor for lateral and screen foundation installation.
Installation of a physical barrier in the discharge pond for enhanced mixing and debris
maintenance purposes during pigging operations.
Installation
Concurrent work:
o Air burst system (if determined through the pilot project as beneficial).
o Lateral and screen installation without connection to intake structure.
o Floating debris boom/curtain.
Connection of the new intake line from the intake tunnel to the existing intake pump station.
Sealing the intake and discharge tunnels.
Plant Shutdown:
o Modify intake structure to receive intake laterals.
o Connect laterals to intake structure.
Commissioning and testing.
Demobilization.
Intake/Discharge System Maintenance
Passive vs. Active WWS Maintenance
If passive screens are installed they would be cleaned in place by divers that would be
based on a floating barge. When the barge is not in use, it will be tied to the existing EPS
inlet structure. If the active rotating screens (motorized) are installed they would be equipped
with a brushing mechanism that would require less biofouling cleaning (specific cleaning
requirements would be determined by the pilot project results) by divers that would be based
on a floating barge. Visual inspections would occur periodically using a submersible camera
and/or divers to determine cleaning requirements. An entire pipeline would be isolated to
clean all screens along a pipeline at one time. The screen exterior and interior would be
cleaned as follows:
Exterior - Divers would use a combination of manual cleaning with brushes and hydro-
blasting using pressurized water spray nozzles on the external surfaces of the screens.
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Sixth CEQA Addendum 13 February 2019
The seawater used for hydro-blasting would pass through one of the adjacent screens
prior to use. Biofouling debris removed from the exterior of the screens would remain in
the lagoon. Accumulated silts and marine sediments near the screens would be removed
periodically via pumping from a maintenance barge. The material would be discharged to
a tank mounted on the barge that would filter the material from the water using siltation
curtains before returning the water to the lagoon or the material would be pumped to the
discharge pond and would pass through siltation curtains before exiting into the ocean.
Alternatively, material would be pumped to Fishing Beach where sediment would settle
out and water would be returned to the lagoon (similar to the current practice for lagoon
dredging). In this scenario accumulated sediment would be spread out on Fishing Beach
within an existing easement granted to Poseidon for this purpose or hauled off-site for
disposal (see Figure 6).
Interior - Both manual cleaning and hydro-blasting would be used in the internal surfaces
of the screens. Divers would enter the screen via hatches (likely at one of the endcaps).
Any biofouling debris that has released from within the screen would be removed using a
trash pump. The trash pump would discharge to a tank mounted on the barge that would
filter the biofouling debris from the water using siltation curtains before returning the debris
water to the lagoon or the material would be pumped to the discharge pond and may pass
through siltation curtains before exiting into the ocean. Solids collected would then be
dewatered and hauled off site for disposal.
Alternatively, active or passive WWS would be removed and refurbished at an off-site
location. Spare WWS would be mounted in place of the WWS removed from cleaning. If
WWS were removed, the lateral would remain out of service until all replacement WWS
were installed and ready for operation.
Screen cleaning would occur as frequently as necessary to ensure the screening system is able
to meet the CDP’s intake requirements. Under typical passive screen operating conditions, it is
estimated that the screens would be cleaned once a month (12 cleanings annually) and likely less
frequently if the active screens are installed. During challenging conditions such as winter storm
events or algal blooms, more frequent cleaning may be required to manage free-floating debris
that may collect on or near the WWSs.
An airburst system may be used to attempt to dislodge debris that may collect on screens. The airburst
system would consist of two receiver tanks (5,000 to 10,000 gallons) that are approximately 12 feet
high and surrounded by security fencing, two air compressors located within a new structure
(approximately 16 feet wide, 24 feet long, and 12 feet high), and conveyance piping. Manual cleaning
of the screens by divers would be conducted as needed during the monthly screen cleaning events
to remove floating debris that may accumulate on the screens. If active screens are utilized (to be
determined after the pilot project), the airburst system may not be needed.
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A floating debris boom/curtain around the intake screens would block floating debris from entering
the screening area. The floating debris boom extends from the surface three to 5 feet down into
the water. The debris boom would be a solid barrier rather than a mesh to avoid marine life
impacts. The debris boom would act as a stand-off zone to prevent the public from entering the
screened area where airbursting may occur and where screens could be damaged by anchors.
Portions of the floating debris boom would be adjustable to allow for surface maintenance vessel
entrance/exit to the protected area. The boom would also have to be maintained by manually
removing floating debris that may accumulate.
Intake Lateral Maintenance
Maintenance of the intake laterals could involve physical removal of biofouling debris by pipe
pigging. Pigging would be conducted quarterly and will require a shutdown of 1 or 2 days (per lateral)
for each pigging event (i.e., a total of 16 pigging events per year). Pigging operations would ensure
that the debris removed from the lateral’s internal surfaces can be efficiently collected. The pig
would be launched from a barge and the pressure to drive the pigging process would come from
the fish-friendly pump station, or a barge-mounted pump taking suction from an intake lateral (so
that pumped flow has been screened through the wedgewire screens).
Debris removed by pigging and additional flushing water would be directed to the discharge pond.
Existing stop logs in the existing tunnels will be used to divert the flow and debris into the existing
discharge tunnel and ultimately into the pond. The management of the pigging debris will be
accomplished through two separate means: 1) hydraulic sorting (settling) of solids based on particle
size and velocities in the discharge pond and 2) physical barrier and if needed, a temporary silt
curtain (or similar). Debris removal from the discharge pond will be conducted as needed if debris
accumulates during maintenance and cleaning activities. Debris removal operations would be
designed to comply with the California Ocean Plan Water Quality Objectives.
6.0 REQUIRED ACTIONS
To process the proposed modifications, the Water Authority will:
1. As the lead agency under CEQA, consider the Sixth Addendum along with the SEIR,
FEIR and prior addenda; and
2. Approve 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 Sixth Addendum, and subsequent permits.
As noted in the SEIR, additional approvals may be required as follows:
U.S. Army Corps of Engineers: 404 Permit (Nationwide Permit)
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Sixth CEQA Addendum 15 February 2019
California Coastal Commission: Coastal Development Permit Amendment
California Department of Fish and Wildlife: Streambed Alteration Agreement
RWQCB – Renewal of NPDES CA0109233 and 401 Water Quality Certification
City of Carlsbad
o Amendment to the Precise Development Permit
o Amendment to the Special Use Permit
o Conditional Use Permit
7.0 IDENTIFICATION AND ANALYSIS OF ENVIRONMENTAL EFFECTS
The following environmental issue areas that were included in the previous environmental
documents are analyzed:
Aesthetics
Air Quality/Greenhouse Gas Emissions
Biological Resources
Cultural/Tribal Resources
Geology and Soils
Hazards and Hazardous Materials
Hydrology and Water Quality
Land Use and Planning
Noise and Vibration
Transportation and Traffic
Public Utilities and Service Systems
Cumulative Impacts
The analysis also discusses whether the proposed modifications described in Section 5.0 would
trigger significance criteria identified in the CEQA Guidelines, Section 15162, in each of these
areas. For each environmental issue area, a comparative analysis of the impacts presented in
the previous environmental documents is provided. 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.
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Sixth CEQA Addendum 16 February 2019
This section evaluates the potential environmental effects of the proposed modifications. Each
portion of the analysis begins with a summary of the previously analyzed environmental effects
of the approved project (from the previous environmental documents).
The potential environmental effects of the proposed modifications are then evaluated and
compared to the effects that were previously analyzed for the approved project. 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 substantial increase in the severity of significant impacts that were identified
in the previous environmental documents.
As stated in Section 1.0, activities associated with the proposed modifications are subject to the
requirements and mitigation measures identified in the previous environmental documents.
Where such requirements apply and are relevant, they are noted in the discussion below.
The previous environmental documents are on file at the Water Authority’s office, 4677 Overland
Avenue, San Diego, California, 92123.
The following presents the environmental analysis of impacts associated with the proposed
modifications. In instances where the impacts resulting from several proposed modification
components would be similar, their corresponding analyses have been grouped together. In instances
where impacts differ by proposed modification component, they are discussed separately.
Aesthetics
Previous Analysis
Analysis of aesthetic impacts and EIR-identified mitigation measures of the approved project are
contained in the FEIR, Section 4.1, pages 4.1-3 through 4.1-12. See also the CEQA Findings for
the FEIR, pages 10 and 11. These sections identify the components of the proposed modifications
that may produce visual impacts or affect visual character upon implementation.
The previous environmental documents 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 on-site
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.
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Sixth CEQA Addendum 17 February 2019
Off-site 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. 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 (City of Carlsbad, 2014). There are no officially designated or eligible State scenic
highways or identified scenic resources in proximity to the proposed modifications or desalination
plant site (Caltrans, 2013).
The proposed modifications would include relocation of the fish-friendly pump station that would
be enclosed within the pump station vault. The submersible pumps will be placed within the
discharge vault. The discharge piping from the submersible pumps will be located above grade
for a short distance then turning downward into the below grade discharge tunnel leading to the
discharge pond. The proposed modifications would also include submerged intake laterals and
WWSs within the Agua Hedionda Lagoon, but these intake laterals would not be visible within the
lagoon. Although the proposed modifications would include the addition of a floating debris boom
in the lagoon at the location of the WWS intake, 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
debris boom would not be highly visible and would not substantially change the visual character
of the lagoon. Similarly, the pilot project would only include submerged pipes and WWSs within
the lagoon and internal modifications to existing HSWRI pump facilities to operate the pilot project.
The proposed modifications are designed with the same visual character as the existing aesthetic
on the EPS site and of the CDP.
Construction of the proposed modifications may cause short-term, temporary aesthetic impacts,
including equipment storage, materials, soil stockpiling and debris exposed to public views.
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, occasionally trips by divers would occur for
screen maintenance. This would involve the presence of divers and marine vessels in the
lagoon but would occur intermittently and for short durations. Sediment removed during the
cleaning of the intake laterals by pigging would end up in the discharge pond with the new
physical barrier, and if needed, temporary silt curtains (or similar) would be placed in the
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Sixth CEQA Addendum 18 February 2019
discharge pond to trap and settle out sediment within the discharge pond and zone of initial
dilution in accordance with Ocean Plan requirements. Therefore, impacts to water quality
during operations and maintenance would be less than significant.
Additionally, air bursting may result in the formation of bubbling at the water surface near the
WWS intake during maintenance activities. However, the disturbance of the surface water in the
lagoon would be confined to the WWS intake area and would only occur intermittently and over a
short duration. As such, the operation and maintenance of the proposed modifications would not
substantially or permanently alter the existing visual character of the lagoon.
The construction and operation of a similar pump station was evaluated in both the FEIR and
Supplemental EIR and were determined to have less than significant impacts with incorporation
of mitigation measures for screening and lighting. Similarly, the proposed fish-friendly pump
system would comply with the landscape plan and other mitigation measures for screening and
reduced lighting. The intake laterals and WWSs would be located underwater within the lagoon
and would not be visible by the public.
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.
Mitigation measures to control nighttime exterior lighting fixture were also 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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There are no changes with respect to circumstances under which the proposed project would be
undertaken, and there is no new information of substantial importance that has become available
relative to visual or aesthetic resources. No substantial changes in the aesthetic or visual
environment have occurred that were not accounted for through certification of the previous
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Sixth CEQA Addendum 19 February 2019
environmental documents and no substantial new sensitive receptors or scenic resources have
been identified within the vicinity of the proposed modifications.
Conclusion
Based on the above, no new significant aesthetic impacts or a substantial increase in previously
identified aesthetic impacts would occur as a result of the proposed modifications. All mitigation
measures previously adopted for the approved project will apply to the proposed modifications
described herein, as applicable. Therefore, the impacts to aesthetic resources and the proposed
modifications do not meet the standards for a subsequent or supplemental EIR as provided
pursuant to CEQA Guidelines, Section 15162.
Air Quality and Greenhouse Gas Emissions
Previous Analysis
Analysis of air quality impacts and EIR-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. These sections outline how the proposed project may impact existing and
future air quality conditions.
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 on-site 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 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.
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Sixth CEQA Addendum 20 February 2019
The Supplemental EIR also 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.
Analysis of the Proposed Modifications
Air Quality
The Supplemental EIR analyzed on-site modifications to the existing seawater intake,
including installation of new screening/fish-friendly pumping structure and auxiliary facilities
which are similar to those of the proposed modifications. However, the proposed modifications
would also include the construction of intake laterals, WWSs, and a pilot project of two small-
scale laterals and WWSs.
Construction of these facilities would result in temporary increases in criteria pollutant emissions
associated with soil disturbance, dust emissions, and combustion pollutants from on-site
construction equipment and marine vessels, as well as from personal vehicles, vendor/delivery
trucks, and trucks hauling soil and aggregate material. Construction emissions for the all of the
proposed modifications were modeled using the California Emissions Estimator Model
(CalEEMod) Version 2016.3.2 (see Appendix A).
Construction of the pilot project, intake pipelines and WWSs, and fish-friendly pump station
and associated facility improvements would be accomplished in two primary construction
phases: 1) construction of the fish-friendly pump system and pilot project; and 2) construction
of the WWS intake system.
The pilot project would be constructed over a 6-month period starting in mid-2019 (concurrent
with the first phase of construction for the fish-friendly pump station). This would involve the HDPE
piping to be assembled and laid on the lagoon floor via concrete ballasts using a barge, crane,
and divers. The divers would also attach the WWS assemblies to the pipelines and onshore
modifications to the pump station at HSWRI would occur to allow operation of the pilot project.
The construction of a Fish-friendly pump station and auxiliary facilities would also start
construction in mid-2019 (concurrent with construction of the pilot project), lasting approximately
6 months. Improvements during the first construction phase would be made to the mechanical,
electrical, and concrete aspects of the forebay, intake vault, and pump station.
The second phase of construction, installation of the WWS intake component and auxiliary
facilities, would start at the beginning of 2023 and last approximately one year. This would include
installation of the intake laterals, the WWS arrays, airburst system if needed, floating debris boom,
pond barrier and tie-in of these systems to the EPS intake and discharge tunnels.
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Table 2, Estimated Maximum Daily Construction Criteria Pollutant Emissions, shows the construction
criteria pollutant emissions for each year associated with the proposed modifications.
Table 2
Estimated Maximum Daily Construction Emissions (pounds per day)
Year VOC NOx CO SOx PM10 PM2.5
2019 9.85 92.68 41.76 0.12 5.83 4.35
2023 14.10 124.84 55.68 0.19 7.35 5.70
Maximum Daily Emissions 14.10 124.84 55.68 0.19 7.35 5.70
Emission Threshold 75 250 550 250 100 55
Threshold Exceeded? No No No No No No
Source: See Appendix A for complete results.
Note: 2019 emission represent the construction of the fish-friendly pump station and pilot project and 2023 emissions represent construction of
the new WWS intake system for the CDP.
As shown above, construction of the proposed modifications would not exceed San Diego County
Air Pollution Control District (SDAPCD) thresholds for criteria pollutant emissions and would result
in a less than significant impact. Furthermore, these emissions are less than those analyzed in
the Supplemental EIR for improvements to the existing CDP intake system and would therefore
not exceed any air quality impacts already analyzed for the approved project in the previous
environmental documents.
The pilot project would be operated for two years prior to construction of the full-scale intake
system for the CDP. Operation of the new intake system for the CDP would include energy for
the pump station and maintenance for intake and WWS cleaning. Operation of the pilot project
(pump station and motorized active screens) and the new WWS intake system for the CDP (pump
station and motorized active screens, if selected based on the results of the pilot project) would
use electricity provided by SDG&E through the electrical grid. As a result, operation of the pump
stations and motorized active screens for both the pilot project and the new WWS intake system
for the CDP would not result in the direct emission of criteria air pollutants.
However, both the passive and active screens would require cleaning and maintenance by divers that
would result in criteria pollutant emissions from the operation of marine vessels. The operation of the
pilot project would not overlap with the operation of the new WWS intake system for the CDP. As a
result, the maximum daily emissions from maintenance of the WWS intakes for both the pilot project
and the new WWS intake system for the CDP would involve a maximum of one cleaning/maintenance
trip per day. Table 3, Estimated Annual Operational Criteria Pollutant Emissions, shows the criteria
pollutant emissions estimated to occur during these types of maintenance activities for both the pilot
project (2019) and the new WWS intake system for the CDP (2023).
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Table 3
Estimated Maximum Daily Operational Emissions (pounds per day)
Year VOC NOx CO SOx PM10 PM2.5
2019 0.91 7.79 2.55 0.01 0.35 0.35
2023 0.95 7.97 2.62 0.01 0.38 0.37
Maximum Daily Emissions 0.95 7.97 2.62 0.01 0.38 0.37
Emission Threshold 75 250 550 250 100 55
Threshold Exceeded? No No No No No No
Source: See Appendix A for complete results.
Note: 2019 emission represent the construction of the fish-friendly pump station and pilot project and 2023 emissions represent construction of
the new WWS intake system for the CDP.
As shown above, operation and maintenance of the proposed modifications would not
exceed SDPACD thresholds for criteria pollutant emissions and would result in a less than
significant impact.
As previously stated, the Supplemental EIR Findings of Fact and Statement of Overriding
Considerations identified the potential indirect criteria pollutant emissions from electrical
generation used to operate the CDP as a cumulatively significant impact. The proposed
modifications would not substantially change the operational and maintenance criteria pollutant
emissions previously analyzed in the Supplemental EIR and would not result in a new significant
impact. Additionally, operation and maintenance activities for the proposed modifications would
not exceed SDAPCD thresholds and many of these activities were already analyzed in the
Supplemental EIR. Therefore, the proposed modifications would not make this previously
identified cumulative impact from indirect criteria pollutant emissions from electrical generation
substantially more severe.
Greenhouse Gas Emissions
Construction and operation of the proposed modifications would also generate greenhouse gas
(GHG) emissions from operation of construction equipment, marine vessels, motor vehicles, and
for electrical generation for operations and maintenance activities. Under the worst-case scenario
for annual GHG emissions, the proposed modifications would operate active screens that would
require electricity to power the motor used to rotate the screens. Additionally, periodic manual
cleaning by divers would also be required that would result in GHG emissions from marine vessel
use. 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 4, Estimated Annual GHG Emissions, shows the
combined amortized construction GHG emissions and annual operational GHG emissions.
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Table 4
Estimated Annual GHG Emissions (total metric tons)
Construction Year MT CO2e Emissions
Construction in 2019 365.55
Construction in 2023 843.92
Total Construction Emissions 1209.47
Amortized Construction Emissions 24.19
Annual Operational Emissions 1 17.99
Total Annual Emissions 42.18
Source: See Appendix A for complete results.
CO2e = carbon dioxide equivalent.
1 Based on worst-case GHG emissions scenario of active/rotating screens using electricity and manual cleaning by divers 6 times per year.
As shown above, operation and maintenance of the proposed modifications would not exceed
SDPACD screening threshold of 900 metric tons of carbon dioxide equivalent (MT CO2E) for GHG
emissions. Additionally, as described in the Supplemental EIR the Special Conditions of the Coastal
Development Permit by the California Coastal Commission require implementation of Energy
Minimization and Greenhouse Gas Reduction Plan (GHG Plan), which would assess, reduce, and
mitigate GHG emissions, and which establishes a protocol for identifying, securing, monitoring, and
updating measures to eliminate the CDP’s net carbon footprint. As a result, the GHG emissions for
the CDP and the proposed modifications would be reduced to “net zero” through implementation of
the GHG Plan. Furthermore, these emissions include operation and maintenance activities that were
already analyzed in the Supplemental EIR (e.g., operation of new fish-friendly pumps and increasing
the annual average product water produced by the CDP) and therefore overstate the actual additive
emissions that would occur as a result of the proposed modifications.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
The type and extent of construction activities and the operational characteristics associated
with the proposed modifications would not be substantially different from what was evaluated
in the previous environmental documents for the approved project. All energy use required to
deliver product water would be incurred by pumps at the CDP, and this energy use was
previously analyzed in the FEIR for the CDP. The proposed modifications would not exceed
the SDAPCD screening threshold for Air Quality criteria pollutants or GHG emissions and
would not substantially increase operational GHG emissions from what was analyzed in the
previous environmental documents. The GHG emissions from construction activities
associated with the proposed modifications would not exceed those identified in the FEIR,
and 25,000 tons of carbon offsets as mitigation for construction-related emissions from the
construction of the CDP will be purchased, which far exceeds the offsets that would actually
be needed for construction-related impacts, even with the addition of the proposed
modifications (see Appendix A). Additionally, the GHG Plan was approved by the CCC in
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August 2008. With implementation of the GHG Plan, the proposed project will demonstrate a
“net zero” impact on GHG emissions from indirect sources (electrical energy consumption).
Therefore, there are no changes with respect to circumstances under which the proposed project
would be undertaken, and there is no new information of substantial importance that has become
available relative to air quality or GHG emissions. No substantial changes in the pollutant
emissions or GHG emissions have occurred that were not accounted for through certification of
the previous environmental documents and no substantial new sensitive receptors or scenic
resources have been identified within the vicinity of the proposed modifications.
Conclusion
The proposed modifications would not substantially change the operational and maintenance
criteria pollutant emissions previously analyzed in the Supplemental EIR and would not result in
a new significant impact. Additionally, 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 air quality impacts, nor would it result in any new significant effects related to air
emissions 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 air quality and 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.
Biological Resources
Previous Analysis
Analysis of biological resources impacts and EIR-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
significant unmitigable impacts to marine environment biological resources would occur as a
result of the approved project. The proposed modifications would not affect any terrestrial
biological resources.
The FEIR analyzed the CDP’s potential effects on the marine environment related to effects of
chemical additives, impingement, entrainment, and salinity. In the FEIR it was determined that
the CDP would either not require the EPS to increase the quantity or velocity of water withdrawn,
or if the CDP was operated in the “stand-alone” condition, would not withdraw seawater with a
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Sixth CEQA Addendum 25 February 2019
through-screen velocity greater than 0.5 feet per second. Therefore, the FEIR concluded that the
CDP would not result in significant impacts related to impingement of marine life. With regards to
entrainment, the FEIR concluded that the small proportion of marine organisms lost to
entrainment as a result of the desalination plant operated either in the co-located or stand-alone
scenarios, would not have a substantial effect on the species’ ability to sustain their populations
because of their widespread distribution and high reproductive potential. The most frequently
entrained species are very abundant in the area of EPS intake, Agua Hedionda Lagoon, and the
Southern California Bight; and therefore, the actual ecological effects due to any additional
entrainment from the desalination plant were determined to be less than significant. However,
despite these findings in the FEIR, the RWQCB and the California Coastal Commission required
mitigation (Marine Life Mitigation Plan [MLMP]) under the standards that those agencies applied
in issuing permits to operate the CDP to fully mitigate mortality of marine life. The mitigation
consists of creation of 66.4 acres of estuarine habitat to fully offset all impacts associated with
impingement and entrainment of all forms of marine life. The FEIR also concluded that chemical
additives would be neutralized prior to discharge and that impacts from these chemical additives
on marine life would be less than significant. Additionally, the FEIR concluded that under typical
conditions, the discharge from the desalination plant would not exceed a salinity level of 36.2
parts per thousand (ppt) within the Zone of Initial Dilution (ZID), which is below the significance
criteria of 38.4 ppt. To ensure that impacts remain at a less than significant level, a mitigation
measure was included in the FEIR for purposes of requiring monitoring of the combined
operations of the desalination plant and the EPS to ensure that salinity levels remain within the
parameters that have been analyzed.
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 lower, fish-
friendly pumps, a fish return system, and an increase in average annual product water from the
CDP. The Supplemental EIR concluded that overall there would be 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 MLMP would mitigate
for the impingement and entrainment losses analyzed in the Supplemental EIR. 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.
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Analysis of the Proposed Modifications
Impingement is the pinning of larger organisms against the screen mesh by the flow of the
withdrawn water and is typically a result of high intake water velocities. The proposed
modifications are required by the SWRCB for compliance with the Desalination Amendment to
reduce impacts to marine life. The proposed modifications 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.
As a result, no impingement is anticipated to result from the proposed modifications, the same as
analyzed in the Supplemental EIR.
Entrainment is the passage of smaller organisms through the screening slots. The amount of
entrainment mortality for any species from intake operation is dependent on the number of
marine organisms entrained and the subsequent mortality of those organisms as they pass
through the process equipment. For the purposes of this analysis the mortality of marine
organisms entrained in the CDP and proposed modifications is assumed to be 100%, the
same as analyzed in the previous environmental documents. Based on intake-related
entrainment through the feedwater system, the flow augmentation system, with a combined
maximum of 299 MGD would be 65.97 acres using the methodology set forth in Appendix E
of the Staff Report for the Desalination Amendment after accounting for a 1% credit for 1 mm
screening technology.
To further reduce impacts to marine life pursuant to the Desalination Amendment, the SWRCB
requires that the proposed modifications include 1-mm WWS arrays on the intake pipes. This is
compliant with the Desalination Amendment and similar to the screen size analyzed in the
Supplemental EIR. Additionally, the same amount of intake seawater would be used with
implementation of the proposed modifications as previously analyzed in the Supplemental EIR.
The proposed modifications would be subject to the Desalination Amendment requirement to
mitigate for any impacts to marine life, including those from entrainment. Therefore, with
implementation of the proposed modifications there would not be an increase in the entrainment
impacts from those analyzed in the previous environmental documents.
The BMZ for the CDP would generally be a 200-meter (656 foot) radius semi-circle from the
terminus of the discharge channel in the Pacific Ocean. Outside of the BMZ, salinity would not
exceed 2 ppt over ambient background salinity, in compliance with the Desalination Amendment.
The benthic area encompassed by the BMZ would be approximately 18.51 acres. Potential
salinity impacts would be the same as those analyzed in the Supplemental EIR because the
seawater intake, brine discharge, and dilution water flow rates would remain the same.
Additionally, there is no naturally occurring hard substrate, giant kelp, or surfgrass habitat exists
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within the area of the BMZ; however, there is approximately 0.31 acres of man-made jetties that
could be considered a non-natural hard substrate environment. The BMZ would extend over
sandy, soft-bottom habitat, which is generally less productive in terms of biological diversity and
density of organisms, thereby reducing the potential for impacts to marine life and special-status
species in the BMZ. Any impacts to marine life would be mitigated through the existing mitigation
measures included in the Supplemental EIR.
Construction of the proposed modifications would result in permanent disturbance of benthic
habitat within the Agua Hedionda Lagoon. Similarly, the Supplemental EIR analyzed potential
benthic impacts from the fish return system, which would not be implemented with the proposed
modifications. The lagoon was originally a natural, seasonal estuary that was often closed off from
the Pacific Ocean. The lagoon was opened to the Pacific Ocean to provide cooling water for the
EPS and the outer portion of the lagoon and connection to the Pacific Ocean are dredged
approximately every two years for maintenance purposes. Temporary disturbance of benthic
habitat would also occur 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 proposed
modifications would be mitigated through compliance with the Desalination Amendment
requirements for mitigating impacts to marine life.
The RWQCB and California Coastal Commission requirements for mitigation that would be
implemented by the MLMP would compensate for the level of productivity that is anticipated to be
lost as a result of the proposed modifications. Furthermore, the Desalination Amendment requires
mitigation for marine life mortality that would be fulfilled through the MLMP. Therefore, any
impacts to marine life would be fully mitigated and impacts would be less than significant.
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 mitigation,
impacts to biological resources would be similar to those discussed in the previous environmental
documents and would remain less than significant.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in biological resource conditions within the area of the
proposed modifications since the time of certification of the previous environmental documents.
Additionally, no new information of substantial importance regarding biological resources has
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Sixth CEQA Addendum 28 February 2019
become available. Therefore, no changes in circumstances and no new information of
substantial importance relative to biological resources have been identified.
Conclusion
The proposed modifications were designed based on feedback from the RWQCB staff during
permitting the CDP for stand-alone operation to further minimize biological impacts from the CDP
operations in compliance with the Desalination Amendment. None of the proposed modifications
or additions involve new significant impacts or a substantial increase in previously identified
impacts related to biological resources. 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 biological resources which was not known and could not have
been known when the previous environmental documents were approved. 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.
Cultural Resources
Previous Analysis
Analysis of cultural impacts and EIR-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 investigated 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.
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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, intake modifications and fish return feature. However, no tribal cultural resources
were identified as part of this process.
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.
Analysis of the Proposed Modifications
The proposed modifications would include the excavation and grading activities necessary to
improve the existing concrete intake area and pump station vault. Onshore work would occur in
previously disturbed areas or areas with existing structures. Offshore work areas would occur in
the outer Agua Hedionda Lagoon for improving the existing intake inlet/forebay area and
placement of the intake laterals, WWS arrays, debris curtain anchors and pilot project on the
bottom of the lagoon. 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 exist on the surface of the lagoon bottom, where the intake pipes and WWS intake
system 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. Portions of the modifications that would be
constructed within the lagoon are within areas that have been subject to extensive dredging as part
of the construction and regular maintenance of the lagoon, and therefore would not contain significant
cultural resources. After outreach to local Tribes, no tribal cultural resources were identified in the
Supplemental EIR. 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.
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Therefore, no new potential 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 have an effect on cultural or paleontological resources. 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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in cultural, resource conditions within the area of the
proposed modifications since the time of certification of the previous environmental documents.
Additionally, no new information of substantial importance regarding cultural resources has
become available. Therefore, no changes in circumstances and no new information of
substantial importance relative to cultural resources have been identified.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in
previously identified impacts related to cultural resources. 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 cultural resources which was not known and could
not have been known when the previous environmental documents were certified/ approved has
since been identified. Therefore, the impacts to cultural resources as a result of the proposed
modifications do not meet the standards for a subsequent or supplemental EIR as provided
pursuant to CEQA Guidelines, Sections 15162.
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
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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
The FEIR determined that the overall subsurface profile (including formational deposits of the
Santiago Formation) and overlying thickness of non-saturated soils indicated that the potential
for large-scale liquefaction to occur at the desalination plant site is very low. In addition, the
proposed modifications would adhere to current building code standards that are intended to
reduce potential for structural damage resulting from liquefaction.
The proposed modifications would include some excavation for the improvements to the
existing intake area. The soil characteristics on the site have not altered since the FEIR and soil
characteristics in the localized area beneath the proposed modifications are expected to be the
same as those identified throughout the EPS and CDP site. Any soils material removed as part
of the proposed modifications would be required to follow the same landfill disposal mitigation
measures and regulations as identified in the previously approved environmental documents.
Therefore, impacts from the proposed modifications would be less than significant, consistent
with the previously certified FEIR. Any potential geologic impacts of the proposed modifications
would be mitigated to a less-than-significant level with incorporation of the previously identified
mitigation in the FEIR.
The onshore footprint for the proposed modifications is within an existing built-up areas, or on
a site adjacent to light industrial and commercial facilities. These areas are not suitable for
mineral extraction. Therefore, 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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in geological, seismic, soils, or mineral resource
conditions within the area of the proposed modifications since the time of certification of the
previous environmental documents. Additionally, no new information of substantial importance
regarding known geological hazards, conditions, or resources has become available. Therefore,
no changes in circumstances and no new information of substantial importance relative to
geology and soil resources have been identified.
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Conclusion
None of the proposed modifications or additions involve new significant impacts or a substantial
increase in previously identified impacts related to geology, seismic, soils, or mineral resources
within the previous environmental documents. 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 geological resources which was not known and could not
have been known when the previous environmental documents were approved has since been
identified. Therefore, the geology/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.
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 potentially discovered during construction. The previous environmental
documents included measures to mitigate this 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 will 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
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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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in hazards or hazardous materials conditions within
the area of the proposed modifications since the time of certification of the previous
environmental documents. Additionally, no new information of substantial importance regarding
hazards or hazardous materials has become available. Therefore, no changes in circumstances
and no new information of substantial importance relative to hazards or hazardous materials
have been identified.
Conclusion
None of the proposed modifications or additions involve new significant impacts or a substantial
increase in previously identified impacts related to hazards and hazardous materials. 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 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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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 avoid or mitigate
potential effects by 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 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; specifically, the
Supplemental EIR. See the discussion of potential salinity effects of the proposed modifications
under Biological Resources.
Ground disturbing construction activities are not anticipated to encounter groundwater on site. 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 Agua Hedionda 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 demolition, excavation, grading, which
would expose soils and increase erosion potential. 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
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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 will 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.
During operations cleaning of the WWS via an air burst may occur to release any trapped debris.
Cleaning of the intake laterals via pigging could temporarily release this debris and sediment into the
lagoon. However, this debris would consist of naturally occurring biofouling and sediment, identical to
existing constituents in the lagoon and ocean water. A floating debris boom would also be installed
as part of the project to capture any debris that may affect water quality in the area. As a result, debris
removed by pigging and additional flushing water would be directed to the discharge pond and
managed by hydraulic sorting (settling) of solids based on particle size and velocities in the discharge
pond and by the physical barrier and if needed, a temporary silt curtain (or similar). 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.
Changes With Respect to the Circumstances under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in hydrology or water quality conditions within the area of
the proposed modifications since the time of certification of the previous environmental documents.
Additionally, no new information of substantial importance regarding hydrology or water quality has
become available. Therefore, no changes in circumstances and no new information of substantial
importance relative to hydrology or water quality have been identified.
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
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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.
Land Use/Planning
Previous Analysis
Analysis of land use impacts and EIR-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 with mitigation, because short-term construction related effects would not conflict with
zoning or land use policies.
Analysis of the Proposed Modifications
The proposed modifications would modify the intake and discharge facilities, but would not
change any aspect of the existing or proposed use of the desalination plant site for seawater
intake and discharge that was analyzed under the previous environmental documents. This
proposed use would be 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 traffic delays, 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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in land use policies or requirements within the area of
the proposed modifications since the time of certification of the previous environmental
documents. Additionally, no new information of substantial importance regarding land use has
become available. Therefore, no changes in circumstances and no new information of
substantial importance relative to land use have been identified.
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Conclusion
None of the proposed modifications or additions 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 proposed 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.
Noise and Vibration
Previous Analysis
An analysis of noise impacts and EIR-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 FEIR analysis 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 based. It was estimated in the FEIR that maximum noise
levels would range up to approximately 85 decibels (dB), while the average sound level for an 8-
hour work day was expected to range up to approximately 75 dB.
Analysis of the Proposed Modifications
Construction of the proposed modifications would result in a temporary increase of noise levels
in the vicinity of the CDP site. Construction equipment anticipated for development of the
proposed modifications includes standard equipment that would be employed for any routine
construction project of this scale including tractors/backhoes, trenchers, paving equipment,
loaders, graders, cranes, off-highway trucks, and other pieces of heavy construction equipment.
The use of construction equipment with substantially higher noise and vibration generation
characteristics (such as rock drills, blasting equipment, etc.) is not anticipated for development of
the proposed modifications. However, limited pile driving could occur within the existing discharge
pond area to create a barrier during construction.
Construction noise is difficult to quantify because of the many variables involved, including the
size of equipment used, percentage of time, and number of pieces of equipment that will actually
operate on the site. However, maximum construction noise levels at 50 feet would typically range
from approximately 75 to 85 dB for the type of equipment anticipated to be used for construction
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of the proposed project. The range of maximum noise levels associated with various pieces of
construction equipment is depicted in Table 5.
Table 5
Construction Equipment Noise Emission Levels
Equipment Typical Sound Level (dB) 50 Feet from Source
Air compressor 81
Backhoe 80
Compactor 82
Concrete mixer 85
Concrete pump 82
Concrete vibrator 76
Crane, derrick 88
Crane, mobile 83
Dozer 85
Generator 81
Grader 85
Impact wrench 85
Jackhammer 88
Loader 85
Paver 89
Pile-driver (impact) 101
Pile-driver (sonic) 96
Pneumatic tool 85
Pump 76
Rail saw 90
Rock drill 98
Roller 74
Saw 76
Scraper 89
Truck 88
Source: FTA 2006.
The closest residences to the areas where heavy construction equipment would be used (i.e.,
near the existing CDP and EPS intake areas) would be located approximately 400 feet or more
from the closest construction area for the proposed modifications. Based on a conservative
scenario with the loudest possible piece of construction equipment (i.e., impact pile driver)
operating consistently and assuming standard noise attenuation of 6 dB for every doubling of
distance (FTA, 2006), the predicted maximum construction noise levels at the nearest sensitive
receptor would be 83 dB. This 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. This noise level could intermittently occur for a
few days when construction equipment is operating immediately adjacent to the residential
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Sixth CEQA Addendum 39 February 2019
properties. All construction activity will be limited to the City of Carlsbad’s permitted hours of
construction. Therefore, the proposed modifications would result in less than significant impacts,
consistent with the previously certified FEIR.
Ground-borne vibration is typically attenuated over short distances. Excavation, pile driving, and
heavy grading during the potential widening of the intake area may result in a small amount of
localized ground-borne vibration and/or noise associated with heavy equipment use. However,
construction would not necessitate the use of blasting; therefore, any ground-borne vibration
and/or ground-borne noise would be minimal and highly localized. The site is separated from
residences by intervening topography, which would ensure that minor levels of vibration and/or
ground-borne noise from construction would dissipate before reaching residents. The heavier
pieces of construction equipment, including pile drivers, associated with construction of the
proposed modifications would result in a peak particle velocity substantially below 0.1
inches/second at the nearest residential property line, which is the point at which continuous
vibration can cause annoyance and the exposure of people to excessive ground-borne vibration
(FTA, 2006). Furthermore, pile driving is only expected to occur within the discharge pond area,
where vibrations would be further attenuated by the water. Construction is not anticipated to result
in continuous vibration, nor is it expected to exceed the magnitude listed above.
All construction activity will be limited to the permitted hours of construction. As such, the
construction activities would not exceed relevant noise standards. Noise levels at sensitive
receptors are not expected to exceed the levels analyzed in the previous environmental
documents due to the intermittent nature of construction activities on a day-to-day basis.
Additionally, construction would not expose residents to excessive ground-borne vibration.
Therefore, the proposed modifications would not result in new significant impacts or increase the
severity of impacts identified in the previous environmental documents, and would not change the
conclusion that no significant noise impacts would occur.
The noise level increase from the operation of the proposed pumps and the potential for use of
motor operated wedgewire screens is expected to be minimal at the nearest sensitive receptor
and would not represent a substantial permanent increase in the existing ambient noise level.
Furthermore, the pumps would be enclosed in the below grade pump station vault providing
additional noise attenuation from operation of the proposed modifications. Additionally, the
pumps would be located over 450 feet from the closest sensitive noise receptor and there is
intervening topography blocking the line of sight from these receptors, which would substantially
reduce noise at these receptors. Because the intake is located within an enclosed lagoon, there
is no potential for noise associated with operations to have a substantial impact on fishes or
marine mammals.
Noise from similarly pumping and motorized wedgewire screen operations were analyzed in the
Supplemental EIR (see Appendix S-A to the Supplemental EIR) and were found to not be
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Sixth CEQA Addendum 40 February 2019
significant. If rotating WWSs are installed as part of the new intake system, underwater noise would
be generated by the motors used to operate the rotating screens. However, the screens would
only be operated intermittently and for short periods of time throughout a typical day of operation
and the noise generated from the rotating screens would be at low sound levels. The low sound
level and infrequent nature of the noise that could be generated by the rotating screens would not
exceed any relevant thresholds for marine mammals, including the Fisheries Hydroacoustic
Working Group (FHWG) interim threshold criteria for harm to fishes or the National Marine
Fisheries Service (NMFS) Level B harassment thresholds for low, mid, and high frequency
cetaceans. As a result, operation of the intake system using rotating WWSs would not result in a
significant noise impact to marine life. As such, operational noise from the pumps analyzed in this
addendum would be less than significant.
During maintenance of the proposed modifications, if an air burst system is used it could generate
noise from running the compressors. However, if an air burst system is used for maintenance and
cleaning of the WWS intake system, it would only be operated intermittently and for short periods
of time. Furthermore, the air compressors would be located within a new structure (approximately
16 feet wide, 24 feet long, and 12 feet high) near the new pump station that would attenuate noise
during operation of the air compressors. The air compressors would also be located over 400 feet
from the nearest sensitive noise receptors, with intervening topography between the receptors
and the air compressors that would further attenuate this maintenance-related noise. Additionally,
because the intake is located within an enclosed lagoon, there is no potential for noise associated
with these maintenance activities to have a substantial impact on fishes or marine mammals. As
a result, noise impacts during maintenance would be less than significant.
Additionally, the proposed modifications would not increase the number of daily workers for operation
of the CDP that could increase ambient noise levels resulting from vehicle trips to and from the site.
Therefore, the proposed modifications would result in less than significant impacts, consistent with
the previously environmental documents. Once construction is complete, the proposed modifications
are not anticipated to result in additional operational noise that was not previously analyzed in the
previous environmental documents. Therefore, noise and vibration effects would be similar to the
approved project and impacts would remain less than significant.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in noise or vibration policies or requirements within the
area of the proposed modifications since the time of certification of the previous environmental
documents. Additionally, no new information of substantial importance regarding noise or vibration
has become available. Therefore, no changes in circumstances and no new information of
substantial importance relative to noise or vibration have been identified.
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Sixth CEQA Addendum 41 February 2019
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 proposed project 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.
Transportation and Traffic
Previous Analysis
Analysis of traffic impacts and EIR-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 off-site 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 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 could result in
short-term construction traffic increases. The proposed modifications would not result in
additional workers at the CDP and 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 EPS site location and
lagoon, and would not utilize public roadways for construction, as with the off-site water
delivery pipelines. 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
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Sixth CEQA Addendum 42 February 2019
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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in transportation and traffic conditions within the area of
the proposed modifications since the time of certification of the previous environmental documents.
Additionally, no new information of substantial importance regarding transportation and traffic has
become available. Therefore, no changes in circumstances and no new information of substantial
importance relative to transportation and traffic have been identified.
Conclusion
None of the proposed modifications or additions 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 proposed 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.
Public Utilities and Service Systems
Previous Analysis
Analysis of public utilities and service impacts and EIR-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 water treatment plant and associated infrastructure would not result in significant impacts
to fire protection services, schools, wastewater treatment facilities, landfills, stormwater drainage
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Sixth CEQA Addendum 43 February 2019
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,
including continual operation of a fish-friendly pump station and energy used to operate the
active/rotating screens. Therefore, the proposed modifications would not use a substantially
different amount of energy than what was analyzed in the Supplemental EIR for the pump station
and active/rotating screens. All energy use required to deliver product water to the components
of the proposed modifications would be incurred by pumps at the CDP and part of the proposed
modifications, and this energy use was previously analyzed in the previous environmental
documents. 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.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There have been no substantial changes in public utilities and services, or to the requirements
of agencies that provide such services within the area of the proposed modifications since the
time of certification of the previous environmental documents. Additionally, no new information
of substantial importance regarding public utilities and services has become available.
Therefore, no changes in circumstances and no new information of substantial importance
relative to public utilities and services have been identified.
Conclusion
None of the proposed modifications or additions 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 proposed 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.
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Sixth CEQA Addendum 44 February 2019
8.0 CUMULATIVE IMPACTS
Previous Analysis
Analysis of cumulative impacts and EIR-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
The type and extent of construction activities and the operational characteristics associated with
the proposed modifications would not be substantially different from what was evaluated in the
previous environmental documents for the approved project. Therefore, no changes relative to
the analysis or conclusions regarding cumulative impacts would occur with the proposed
modifications, and the findings of the previous environmental documents remain the same for the
revised proposed project.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
Since approval of the previous environmental documents, additional cumulative development
may have been proposed and/or constructed. The amount of land development projects that have
been proposed and/or developed in the intervening time since the preparation of the previous
environmental documents is not considered to be substantial. The following provides a cumulative
analysis of the proposed modifications.
Aesthetics
The proposed modifications would be of a similar scale and architecture of the surrounding
industrial area and would mostly occur within existing developed areas, underground, or
submerged in the lagoon out of sight. The floating debris boom would be located on the water
surface within the lagoon but would not extend more than a few feet above the water surface and
would be located to a small portion of the lagoon area occupied by the new WWS intake. As such,
the incremental effect of the proposed modifications on any potential significant cumulative impact
would not be cumulatively considerable.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative aesthetic
impacts which was 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 aesthetic impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
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Sixth CEQA Addendum 45 February 2019
Air Quality and Greenhouse Gas Emissions
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.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative air quality
impacts which was 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 air quality impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Biological Resources
The proposed modifications do not involve new significant impacts or a substantial increase in
previously identified impacts since the new intake system is designed to further minimize marine
life mortality and impacts. This includes minimizing impacts from salinity levels and the BMZ,
entrapment and impingement through intake configuration and low intake velocities, and
entrainment by using 1-mm WWS intake arrays and a fish-friendly pumping system. This
conclusion would not be changed with additional cumulative development due to the limited
scope of proposed modifications and the fact that the incremental effect of the proposed
modifications on any potential significant cumulative impact in the context of the Pacific Ocean
would not be cumulatively considerable.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative biological
impacts which was 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 biological impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
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Sixth CEQA Addendum 46 February 2019
Cultural Resources
The proposed modifications will require relatively minor grading and excavation at an already
disturbed site. The mitigation measures required for the approved project 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. As such, the proposed
modifications would not have a cumulatively considerable contribution to a cumulative cultural
resource impact. Similar mitigation measures would also be required for any additional cumulative
development, and therefore the level of cumulative impact would not change.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative cultural resource
impacts which was 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 cultural resource impacts do not meet the standards
for a subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Geology and Soils
The proposed modifications will require relatively minor site preparation and excavation of soils.
The approved project mitigation to control and address erosion and seismic and soils hazards, in
conjunction with similar standard measures required of cumulative development, would reduce
cumulative impacts to less-than-significant levels. This includes following existing regulations and
mitigation measures from the previously approved environmental documents for the proper
disposal of soil material from construction and maintenance. Therefore, the proposed
modifications would not have a cumulatively considerable contribution to a cumulative impact
related to geology and soils.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative geology/soils
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 geology and soils impacts do not meet the
standards for a subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Hazards and Hazardous Materials
The proposed modifications, as well as other cumulative development, would be subject to
existing regulatory controls that would result in minimization of hazards, and therefore the
previous environmental documents concluded that the proposed project would not contribute to
cumulative considerable increases in hazards or hazardous materials. Any additional cumulative
development would have similar regulatory controls.
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Sixth CEQA Addendum 47 February 2019
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative hazard
impacts which was 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 hazards impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Hydrology and Water Quality
The proposed modifications would not contribute to cumulatively considerable impacts because
construction would be temporary and subject to existing regulatory controls. Impacts of any
additional cumulative development would be similar, and would be subject to similar regulatory
control measures. Operational effects of increased salinity levels for the proposed modification
would be limited to the BMZ, which was analyzed in the previous environmental documents and
found to be less than significant. The release of floating debris during maintenance and cleaning
of the new WWS intake system would be collected and disposed of using floating debris booms,
silt screens, and settling in the existing discharge pond in compliance with California Ocean Plan
Water Quality Objectives.
There are no substantial changes to the circumstances under which the approved project will
be undertaken and no new information of substantial importance relative to cumulative
hydrology/water quality impacts which was 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
hydrology/water quality impacts do not meet the standards for a subsequent or supplemental
EIR pursuant to CEQA Guidelines, Sections 15162.
Land Use and Planning
The proposed modifications would not contribute to significant impacts resulting from cumulative
development that may have the effect of dividing an established community or conflicting with
land use or environmental policies. The proposed modifications would not involve any land use
designation changes and therefore would not be cumulatively considerable. Furthermore, any
additional cumulative development would be subject to the existing regulations, plans, and land
use planning standards that would limit potential cumulative impacts.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative land use
impacts which was 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 land use impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
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Sixth CEQA Addendum 48 February 2019
Noise and Vibration
The proposed modifications will not result in cumulatively considerable construction noise and
vibration because existing construction noise regulations and the relatively short time frame for
construction would prevent such an occurrence. Construction of the proposed modifications would
result in noise levels below those analyzed in the previous environmental documents and would
have a less than significant impact. Further, any additional cumulative development would be
subject to the existing noise regulations that would limit potential cumulative impacts. Operational
noise would be similar to what was analyzed in the previous environmental documents and found
to be less than significant.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative noise and
vibration impacts which was 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 noise and vibration impacts do not meet the
standards for a subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Transportation and Traffic
Similar to noise impacts, traffic impacts from the proposed modifications are primarily associated
with construction. Since the time frame for construction is relatively short and traffic control plans
to minimize traffic impacts are required, it is not anticipated that a substantial increase in current
traffic levels resulting from cumulative development will occur prior to completion of construction
for the proposed modifications. Any additional cumulative development would not change these
conclusions because the construction travel routes are not anticipated to substantially conflict with
construction traffic for the proposed modifications and such development would be subject to
existing regulations requiring traffic control plans that would limit potential cumulative impacts.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative traffic impacts
which was 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 traffic impacts do not meet the standards for a
subsequent or supplemental EIR pursuant to CEQA Guidelines, Sections 15162.
Public Utilities and Service Systems
The cumulative impacts analysis for energy and wastewater were considered to be less than
significant because the proposed modifications would not increase the need for public utilities or
services above what was previously analyzed. Energy use by a similar intake system, including
a fish-friendly pump station and rotating screen intake was analyzed in the Supplemental EIR and
Precise Development Plan and Desalination Plant Proposed Project
Sixth CEQA Addendum 49 February 2019
found to be less than significant. Similarly, the proposed modifications would not substantially
alter the energy use of the approved project compared to what was analyzed in the previous
environmental documents. The additional cumulative development would not change the analysis
or conclusions of the previous environmental documents because they would not result in
substantial additional demand on such systems.
There are no substantial changes to the circumstances under which the approved project will be
undertaken and no new information of substantial importance relative to cumulative
utilities/services 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 utilities/services impacts do
not meet the standards for a subsequent or supplemental EIR pursuant to CEQA Guidelines,
Sections 15162.
9.0 GROWTH-INDUCING IMPACTS
Previous Analysis
Analysis of growth-inducing impacts of the approved project are contained in the FEIR, Section
9.0, pages 9-1 through 9-7. See also CEQA Findings, pages 54 and 55.
Analysis of the Proposed Modifications
The proposed modifications would not increase the capacity of the CDP that wasn’t already analyzed
in the previous environmental documents. Therefore, the proposed modifications would not result any
additional residential, commercial, or industrial growth from what was evaluated in the previous
environmental documents. Therefore, no changes relative to the analysis or conclusions related to
growth inducement would occur with the proposed modifications.
Changes With Respect to the Circumstances Under Which the Proposed Project is
Undertaken/New Information
There are no substantial changes under which the approved project will be undertaken, because
there are no substantial changes in growth potential or growth planning that would affect the
analysis contained in the previous environmental documents. No new information of substantial
importance relative to growth inducement has become available since the certification of the
previous environmental documents.
10.0 CONCLUSION
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 approved
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Sixth CEQA Addendum 50 February 2019
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 Sixth Addendum to the FEIR satisfies CEQA requirements
for the proposed modifications described herein.
11.0 REFERENCES
Caltrans (California Department of Transportation). 2004. Transportation Related Earthborne
Vibrations. January 23, 2004.
City of Carlsbad. 2006. Carlsbad Precise Development Plan and Desalination Plant Final
Environmental Impact Report. Certified June 13, 2006.
City of Carlsbad. 2009. CEQA Addendum for the Precise Development Plan and Desalination
Plant proposed project Final EIR. August 2009.
FTA (Federal Transit Administration). 2006. Transit Noise and Vibration Impact Assessment.
Jenkins, Scott A. 2018. Proposed Modifications to the Discharge Channel at the Carlsbad
Desalination Project. October 5, 2018.
Poseidon. 2017. Renewal of NPDES CA0109223: Carlsbad Desalination Project. Appendices AA
through ZZ, inclusive.
Water Authority (San Diego County Water Authority). 2010. Final Environmental Impact
Report/Environmental Impact Statement (EIR/EIS) for the San Diego County Water
Authority Subregional Natural Community Conservation Plan/Habitat Conservation Plan.
State Clearinghouse No. 2003121012. October 2010.
Water Authority. 2012. Second CEQA Addendum for the Precise Development Plan and
Desalination Plant proposed project Final EIR. November 2012.
Water Authority. 2013. Third CEQA Addendum for the Precise Development Plan and
Desalination Plant proposed project Final EIR. September 2013.
5
Project Location
Carlsbad Desalination Plant 6th Addendum
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Modified Intake Boundary/Discharge Boundary
FIGURE 1
ChulaVista
SolanaBeach
Encinitas
San Diego
Carlsbad
Oceanside
El Cajon
Santee
Poway
San Marcos
EscondidoVista
Imperial Beach
DelMar
Coronado
Riverside
County
Mexico
San Diego
County
52
94
125
241
9854
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56
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5
Project Site
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LVD
Proposed Modifications Location
Carlsbad Desalination Plant 6th Addendum
SOURCE: SANGIS 2017
0 400200Feet
FIGURE 2
EPS Ocean Outfall/
Channel Mixing Area
EPS Barrier Pond
WWS Arrays and
Floating Debris Boom
Existing SWRO Pump
Fish-friendly
Pumping Structure
Electrical Building
New Active WWS Intake Site PlanCarlsbad Desalination Plant 6th AddendumFIGURE 3SOURCE: Poseidon Channelside 2017Z:\Projects\j766201\MAPDOC\MAPS\Addendum6
New Passive WWS Intake Site Plan
Carlsbad Desalination Plant 6th Addendum
FIGURE 4SOURCE: Poseidon Channelside 2017Z:\Projects\j766201\MAPDOC\MAPS\Addendum6AREA
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Alternative New Fish-friendly Pumping Station
Carlsbad Desalination Plant 6th Addendum
SOURCE: SANGIS 2017
0 10050Feet
Modified Intake Boundary/Discharge Boundary
Alternative New Fish-friendly Pumping Station
FIGURE 5
Posiedon Fishing Beach Easement
Carlsbad Desalination Plant 6th Addendum
FIGURE 6SOURCE: Poseidon Channelside 2017Z:\Projects\j766201\MAPDOC\MAPS\Addendum6
APPENDIX A
Air Quality and Greenhouse Gases
Construction Emissions
Demonstration Project Marine Vessels AssumptionsVessel 1 ‐ Demonstration Project Vessel 2 ‐ Demonstration ProjectName Tug Boat Name Crew BoatVessel Type Tug Boats Vessel Type Crew and SupplyMain Engine Power (hp) 1000 Main Engine Power (hp) 500Engine Power Range (Low) 751 Engine Power Range (Low) 251Engine Power Range (High) 1900 Engine Power Range (High) 500Main Engine Power (kW) 745.7 Main Engine Power (kW) 372.85Number of Main Engines 1 Number of Main Engines 1Auxiliary Engine Power (hp) 100 Auxiliary Engine Power (hp) 100Auxiliary Engine Power (kW) 74.57 Auxiliary Engine Power (kW) 74.57Number of Auxiliary Engines1 Number of Auxiliary Engines1Main Engine Load Factor0.5 Main Engine Load Factor0.45Auxiliary Engine Load Factor0.31 Auxiliary Engine Load Factor0.43Main Engine Model Year2000 Main Engine Model Year2000Model Year Range (Low) 2000 Model Year Range (Low) 2000Model Year Range (High) 2003 Model Year Range (High) 2003Main Engine Age 19 Main Engine Age 19Main Engine Useful Life21 Main Engine Useful Life22Auxiliary Engine Model Year2000 Auxiliary Engine Model Year2000Auxiliary Engine Age19 Auxiliary Engine Age19Auxiliary Engine Useful Life23 Auxiliary Engine Useful Life22Brake Specific Fuel Consumption (g/hp‐h)184 Brake Specific Fuel Consumption (g/hp‐h)184Operational Time (hours/day) 4 Operational Time (hours/day) 4Work Days (days) 20 Work Days (days) 20Operational Year2019 Operational Year2019Emissions Factorsg/kW‐h g/kW‐h g/kW‐h g/hp‐h g/kW‐h g/kW‐h g/hp‐hVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main 0.68 7.31 1.97 0.00276 0.36 0.3528 545.6Auxiliary0.81 7.31 2.78 0.00276 0.32 0.3136 545.6Crew Boat Main 0.68 7.31 1.97 0.00276 0.36 0.3528 545.6Auxiliary0.81 7.31 2.78 0.00276 0.32 0.3136 545.6Engine Load FactorTug Boat Crew BoatMain0.50 0.45Auxiliary0.31 0.43Engine Useful LifeTug Boat Crew BoatMain21 22Auxiliary23 22Engine Fuel Correction FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main1 0.93 1 1 0.72 0.72 1Auxiliary1 0.93 1 1 0.72 0.72 1Crew Boat Main1 0.93 1 1 0.72 0.72 1Auxiliary1 0.93 1 1 0.72 0.72 1
Engine Deterioration FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main0.44 0.21 0.25 1 0.67 0.67 1Auxiliary0.28 0.14 0.16 1 0.44 0.44 1Crew Boat Main0.44 0.21 0.25 1 0.67 0.67 1Auxiliary0.28 0.14 0.16 1 0.44 0.44 1Time to and from Port of San DiegoTug Boat Crew BoatDistance (nautical miles) a37.2 37.2Speed (knots) b12 12Time (hours)3.1 3.1Max. Daily Number of Trips to or from Port11Total Number of Trips to or from Port22a. Distance based on route from Port of San Diego to Agua Hedionda Lagoon.b. Conservatively assumed that the Santa Barbara Channel Vessel Speed Speed Reduction Trial would apply as slowest speedLagoon Intake Marine Vessels AssumptionsVessel 1 ‐ Lagoon Intake Vessel 2 ‐ Lagoon IntakeName Tug Boat Name Crew BoatVessel Type Tug Boats Vessel Type Crew and SupplyMain Engine Power (hp) 1000 Main Engine Power (hp) 500Engine Power Range (Low) 751 Engine Power Range (Low) 500Engine Power Range (High) 1900 Engine Power Range (High) 251Main Engine Power (kW) 745.7 Main Engine Power (kW) 372.85Number of Main Engines 1 Number of Main Engines 1Auxiliary Engine Power (hp) 100 Auxiliary Engine Power (hp) 100Auxiliary Engine Power (kW) 74.57 Auxiliary Engine Power (kW) 74.57Number of Auxiliary Engines1 Number of Auxiliary Engines1Main Engine Load Factor0.5 Main Engine Load Factor0.45Auxiliary Engine Load Factor0.31 Auxiliary Engine Load Factor0.43Main Engine Model Year2000 Main Engine Model Year2000Model Year Range (Low) 0 Model Year Range (Low) 0Model Year Range (High) 1971 Model Year Range (High) 1971Main Engine Age 22 Main Engine Age 22Main Engine Useful Life21 Main Engine Useful Life22Auxiliary Engine Model Year2000 Auxiliary Engine Model Year2000Auxiliary Engine Age22 Auxiliary Engine Age22Auxiliary Engine Useful Life23 Auxiliary Engine Useful Life22Brake Specific Fuel Consumption (g/hp‐h)184 Brake Specific Fuel Consumption (g/hp‐h)184Operational Time (hours/day) 8 Operational Time (hours/day) 8Work Days (days) 20 Work Days (days) 20Operational Year2022 Operational Year2022Emissions Factorsg/kW‐h g/kW‐h g/kW‐h g/hp‐h g/kW‐h g/kW‐h g/hp‐hVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main 0.68 7.31 1.97 0.00276 0.36 0.3528 545.6Auxiliary0.81 7.31 2.78 0.00276 0.32 0.3136 545.6Crew Boat Main 0.68 7.31 1.97 0.00276 0.36 0.3528 545.6Auxiliary0.81 7.31 2.78 0.00276 0.32 0.3136 545.6
Engine Load FactorTug Boat Crew BoatMain0.50 0.45Auxiliary0.31 0.43Engine Useful LifeTug Boat Crew BoatMain21 22Auxiliary23 22Engine Fuel Correction FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main1011001Auxiliary1 0.93 1 1 0.72 0.72 1Crew Boat Main1011001Auxiliary1011001Engine Deterioration FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2Tug Boat Main0.44 0.21 0.25 1 0.67 0.67 1Auxiliary0.28 0.14 0.16 1 0.44 0.44 1Crew Boat Main0.44 0.21 0.25 1 0.67 0.67 1Auxiliary0.28 0.14 0.16 1 0.44 0.44 1Time to and from Port of San DiegoTug Boat Crew BoatDistance (nautical miles) a37.2 37.2Speed (knots) b12 12Time (hours)3.1 3.1Max. Daily Number of Trips to or from Port11Total Number of Trips to or from Port22a. Distance based on route from Port of San Diego to Agua Hedionda Lagoon.b. Conservatively assumed that the Santa Barbara Channel Vessel Speed Speed Reduction Trial would apply as slowest speedSOURCE: CARB 2007a. Appendix B, Emissions Estimation Methodology for Commercial Harbor Craft Operating in California
Demonstration Project
Maximum Daily Emissions From Construction
pounds/day MT/day
ROG NOx CO SOx PM10 PM2.5 CO2
Vessel Emissions 5.00 42.18 13.02 0.04 2.13 2.09 64.32
Onshore Emissions 4.85 50.50 28.74 0.08 3.70 2.26 3.43
Total 9.85 92.68 41.76 0.12 5.83 4.35 67.75
Total Annual Emissions From Construction
tons/year MT/year
ROG NOx CO SOx PM10 PM2.5 CO2
Vessel Emissions 0.09 0.75 0.23 0.00 0.04 0.04 114.17
Onshore Emissions 0.21 1.82 1.33 0.01 0.11 0.09 251.38
Total 0.30 2.57 1.56 0.01 0.15 0.13 365.55
Lagoon Intake
Maximum Daily Emissions From Construction
pounds/day MT/day
ROG NOx CO SOx PM10 PM2.5 CO2
Vessel Emissions 10.44 86.41 26.77 0.08 4.50 4.41 6.91
Onshore Emissions 3.66 38.43 28.91 0.11 2.85 1.29 4.91
Total 14.10 124.84 55.68 0.19 7.35 5.70 11.82
Total Annual Emissions From Construction
tons/year MT/year
ROG NOx CO SOx PM10 PM2.5 CO2
Vessel Emissions 0.14 1.20 0.37 0.00 0.06 0.06 191.76
Onshore Emissions 0.37 3.06 2.76 0.01 0.16 0.13 652.16
Total 0.51 4.26 3.13 0.01 0.22 0.19 843.92
CalEEMod Version: CalEEMod.2016.3.2
Page 1 of 1 Date: 9/20/2018 12:23 PM
Carlsbad Desal Intake Alternative 21b - San Diego County, Winter
Carlsbad Desal Intake Alternative 21b
San Diego County, Winter
1.0 Project Characteristics
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
User Defined Industrial 1.00 User Defined Unit 2.00 300.00 0
1.2 Other Project Characteristics
Urbanization Urban Wind Speed (m/s)2.6 Precipitation Freq (Days)40
Climate Zone 13 Operational Year 2023
Utility Company San Diego Gas & Electric
CO2 Intensity
(lb/MWhr)
720.49 CH4 Intensity
(lb/MWhr)
0.029 N2O Intensity
(lb/MWhr)
0.006
1.3 User Entered Comments & Non-Default Data
Project Characteristics -
Land Use - user defined inputs
Construction Phase - project schedule; demonstration project in phase 1 interim
Off-road Equipment -
Off-road Equipment - site prep equipment
Off-road Equipment - demolition equipment
Off-road Equipment - site work equipment
Off-road Equipment - concrete work equipment
Off-road Equipment - mechanical work equipment
Off-road Equipment - electrical work equipment
Off-road Equipment - mobilization equipment
Off-road Equipment - site prep equipment
Off-road Equipment - demolition equipment
Off-road Equipment - site work equipment
Off-road Equipment - concrete equipment
Off-road Equipment - dredging equipment - includes land based and barge based equipment
Off-road Equipment - demolition equipment
Off-road Equipment - site work equipment
Off-road Equipment - concrete equipment
Off-road Equipment - mechanical equipment
Off-road Equipment - electrical equipment
Grading -
Demolition -
Trips and VMT - haul trips based on 16 cubic yards per haul
Construction Off-road Equipment Mitigation - no mitigation assumed
Table Name Column Name Default Value New Value
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 1.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 6.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 3.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 12.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 12.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 6.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 11.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 4.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 1.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 18.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 10.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 3.00
tblConstEquipMitigation NumberOfEquipmentMitigated 0.00 21.00
tblConstructionPhase NumDays 2.00 5.00
tblConstructionPhase NumDays 2.00 5.00
tblConstructionPhase NumDays 20.00 10.00
tblConstructionPhase NumDays 200.00 40.00
tblConstructionPhase NumDays 200.00 20.00
tblConstructionPhase NumDays 200.00 20.00
tblConstructionPhase NumDays 200.00 20.00
tblConstructionPhase NumDays 2.00 5.00
tblConstructionPhase NumDays 2.00 5.00
tblConstructionPhase NumDays 20.00 10.00
tblConstructionPhase NumDays 200.00 75.00
tblConstructionPhase NumDays 200.00 25.00
tblConstructionPhase NumDays 4.00 10.00
tblConstructionPhase NumDays 20.00 10.00
tblConstructionPhase NumDays 200.00 60.00
tblConstructionPhase NumDays 200.00 20.00
tblConstructionPhase NumDays 200.00 20.00
tblConstructionPhase NumDays 200.00 20.00
tblGrading MaterialExported 0.00 5,000.00
tblLandUse LandUseSquareFeet 0.00 300.00
tblLandUse LotAcreage 0.00 2.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment HorsePower 402.00 300.00
tblOffRoadEquipment LoadFactor 0.38 0.38
tblOffRoadEquipment LoadFactor 0.38 0.38
tblOffRoadEquipment LoadFactor 0.38 0.38
tblOffRoadEquipment OffRoadEquipmentType Tractors/Loaders/Backhoes
tblOffRoadEquipment OffRoadEquipmentType Pumps
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Cranes
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Cement and Mortar Mixers
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Cranes
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Cement and Mortar Mixers
tblOffRoadEquipment OffRoadEquipmentType Pumps
tblOffRoadEquipment OffRoadEquipmentType Forklifts
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Tractors/Loaders/Backhoes
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Tractors/Loaders/Backhoes
tblOffRoadEquipment OffRoadEquipmentType Cement and Mortar Mixers
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Forklifts
tblOffRoadEquipment OffRoadEquipmentType Excavators
tblOffRoadEquipment OffRoadEquipmentType Tractors/Loaders/Backhoes
tblOffRoadEquipment OffRoadEquipmentType Bore/Drill Rigs
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentType Off-Highway Trucks
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 4.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 4.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 4.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 4.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 3.00 2.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment OffRoadEquipmentUnitAmount 0.00 1.00
tblOffRoadEquipment PhaseName Lagoon Intake - dredge
tblOffRoadEquipment PhaseName Phase 1 Interim - concrete
tblOffRoadEquipment PhaseName Phase 1 Interim - demolition
tblOffRoadEquipment PhaseName Phase 2 - demolition
tblOffRoadEquipment PhaseName Phase 1 Interim - demolition
tblOffRoadEquipment PhaseName Phase 2 - demolition
tblOffRoadEquipment PhaseName Phase 2 - site work
tblOffRoadEquipment PhaseName Phase 2 - concrete
tblOffRoadEquipment PhaseName Lagoon Intake - site work
tblOffRoadEquipment PhaseName Phase 1 Interim - demolition
tblOffRoadEquipment PhaseName Phase 2 - concrete
tblOffRoadEquipment PhaseName Phase 1 Interim - site work
tblOffRoadEquipment PhaseName Lagoon Intake - dredge
tblOffRoadEquipment PhaseName Lagoon Intake - concrete
tblOffRoadEquipment PhaseName Lagoon Intake - concrete
tblOffRoadEquipment PhaseName Phase 1 Interim - site work
tblOffRoadEquipment PhaseName Phase 1 Interim - site work
tblOffRoadEquipment PhaseName Phase 1 Interim - concrete
tblOffRoadEquipment PhaseName Lagoon Intake - site work
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 6.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblOffRoadEquipment UsageHours 7.00 8.00
tblTripsAndVMT HaulingTripNumber 0.00 18.00
tblTripsAndVMT HaulingTripNumber 0.00 76.00
tblTripsAndVMT HaulingTripNumber 0.00 626.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 10.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 10.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 10.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT VendorTripNumber 0.00 5.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 25.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 0.00 15.00
tblTripsAndVMT WorkerTripNumber 15.00 25.00
tblTripsAndVMT WorkerTripNumber 3.00 10.00
tblTripsAndVMT WorkerTripNumber 13.00 25.00
tblTripsAndVMT WorkerTripNumber 5.00 10.00
tblTripsAndVMT WorkerTripNumber 3.00 10.00
Exhaust
PM10
PM10
Total
tblTripsAndVMT WorkerTripNumber 5.00 15.00
2.0 Emissions Summary
2.1 Overall Construction (Maximum Daily Emission)
NBio-
CO2
Total CO2
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
CH4 N2O CO2e
Year lb/day lb/day
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2
2019 4.8477 50.5030 28.7426 0.0754 1.5560 2.1483 3.7043 0.2659 1.9951 2.2611 0.0000 7,500.876
2
7,500.8762 2.0483 0.0000 7,552.083
5
2022 3.6549 38.4299 28.9109 0.1048 1.9336 1.2961 2.8451 0.4319 1.2342 1.2984 0.0000 10,777.61
57
10,777.615
7
2.2137 0.0000 10,832.95
70
Maximum 4.8477 50.5030 28.9109 0.1048 2.2137 0.0000 10,832.95
70
1.9336 2.1483 3.7043 0.4319 1.9951 2.2611
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 10,777.61
57
10,777.615
7
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction
ROG NOx CO Total CO2 CH4 N2O CO2e
Year lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
2019 4.8477 50.5030 28.7426 0.0754 1.5560 2.1483 3.7043 0.2659 1.9951 2.2611 0.0000 7,500.876
2
7,500.8762 2.0483 0.0000 7,552.083
5
2022 3.6549 38.4299 28.9109 0.1048 1.9336 1.2961 2.8451 0.4319 1.2342 1.2984 0.0000 10,777.61
57
10,777.615
7
2.2137 0.0000 10,832.95
70
Maximum 4.8477 50.5030 28.9109 0.1048 1.9336 2.1483 3.7043 0.4319 1.9951 2.2611 0.0000 10,777.61
57
10,777.615
7
2.2137 0.0000 10,832.95
70
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
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Phase 1 Interim - mobilization Site Preparation 6/3/2019 6/7/2019 55
2 Phase 1 Interim - site prep Site Preparation 6/10/2019 6/14/2019 5 5
3 Phase 1 Interim - demolition Demolition 6/17/2019 6/28/2019 5 10
4 Phase 1 Interim - site work Building Construction 7/1/2019 8/23/2019 5 40
5 Phase 1 Interim - concrete Building Construction 8/26/2019 9/20/2019 5 20
6 Phase 1 Interim - mechanical Building Construction 9/23/2019 10/18/2019 5 20
7 Phase 1 Interim - electrical Building Construction 10/21/2019 11/15/2019 5 20
8 Phase 2 - mobilization Site Preparation 1/3/2022 1/7/2022 5 5
9 Phase 2 - site prep Site Preparation 1/10/2022 1/14/2022 5 5
10 Phase 2 - demolition Demolition 1/17/2022 1/28/2022 5 10
11 Phase 2 - site work Building Construction 1/31/2022 5/13/2022 5 75
12 Phase 2 - concrete Building Construction 5/16/2022 6/17/2022 5 25
13 Lagoon Intake - dredge Grading 6/20/2022 7/1/2022 5 10
14 Lagoon Intake - demolition Demolition 7/4/2022 7/15/2022 5 10
15 Lagoon Intake - site work Building Construction 7/18/2022 10/7/2022 5 60
16 Lagoon Intake - concrete Building Construction 10/10/2022 11/4/2022 5 20
17 Lagoon Intake - mechanical Building Construction 11/7/2022 12/2/2022 5 20
18 Lagoon Intake - electrical Building Construction 12/5/2022 12/30/2022 5 20
Acres of Grading (Site Preparation Phase): 0
Acres of Grading (Grading Phase): 0
Acres of Paving: 0
Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Phase 2 - demolition Concrete/Industrial Saws 1 8.00 81 0.73
Lagoon Intake - demolition Concrete/Industrial Saws 1 8.00 81 0.73
Phase 1 Interim - demolition Concrete/Industrial Saws 1 8.00 81 0.73
Phase 2 - site work Cranes 1 8.00 231 0.29
Phase 2 - concrete Cranes 1 8.00 231 0.29
Lagoon Intake - site work Cranes 1 8.00 231 0.29
Lagoon Intake - concrete Cranes 1 8.00 231 0.29
Lagoon Intake - mechanical Cranes 1 8.00 231 0.29
Lagoon Intake - electrical Cranes 1 8.00 231 0.29
Phase 1 Interim - site work Cranes 1 8.00 231 0.29
Phase 1 Interim - concrete Cranes 1 8.00 231 0.29
Phase 1 Interim - mechanical Cranes 1 8.00 231 0.29
Phase 1 Interim - electrical Cranes 1 8.00 231 0.29
Phase 2 - site work Forklifts 1 8.00 89 0.20
Phase 2 - concrete Forklifts 1 8.00 89 0.20
Lagoon Intake - site work Forklifts 1 8.00 89 0.20
Lagoon Intake - concrete Forklifts 1 8.00 89 0.20
Lagoon Intake - mechanical Forklifts 1 8.00 89 0.20
Lagoon Intake - electrical Forklifts 1 8.00 89 0.20
Phase 1 Interim - concrete Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - mechanical Pumps 2 8.00 84 0.74
Phase 1 Interim - mechanical Forklifts 2 8.00 89 0.20
Phase 2 - site prep Excavators 1 8.00 158 0.38
Phase 2 - site work Generator Sets 1 8.00 84 0.74
Lagoon Intake - dredge Cranes 1 8.00 231 0.29
Lagoon Intake - site work Generator Sets 1 8.00 84 0.74
Lagoon Intake - mechanical Off-Highway Trucks 1 8.00 300 0.38
Lagoon Intake - mechanical Generator Sets 1 8.00 84 0.74
Lagoon Intake - electrical Generator Sets 1 8.00 84 0.74
Phase 1 Interim - concrete Cement and Mortar Mixers 2 8.00 9 0.56
Phase 1 Interim - demolition Off-Highway Trucks 4 8.00 300 0.38
Phase 2 - demolition Excavators 1 8.00 158 0.38
Phase 1 Interim - electrical Generator Sets 1 8.00 84 0.74
Phase 1 Interim - site prep Excavators 1 8.00 158 0.38
Lagoon Intake - demolition Excavators 1 8.00 158 0.38
Phase 1 Interim - demolition Cranes 1 8.00 231 0.29
Phase 2 - demolition Off-Highway Trucks 4 8.00 300 0.38
Phase 2 - site work Off-Highway Trucks 4 8.00 300 0.38
Phase 2 - concrete Cement and Mortar Mixers 2 8.00 9 0.56
Lagoon Intake - site work Pumps 2 8.00 84 0.74
Phase 1 Interim - site work Forklifts 1 8.00 89 0.20
Phase 1 Interim - demolition Excavators 1 8.00 158 0.38
Lagoon Intake - demolition Off-Highway Trucks 2 8.00 300 0.38
Phase 1 Interim - demolition Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 2 - concrete Off-Highway Trucks 2 8.00 300 0.38
Phase 2 - site work Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 2 - concrete Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - site work Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - concrete Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - mechanical Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - electrical Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - site work Off-Highway Trucks 3 8.00 300 0.38
Lagoon Intake - dredge Off-Highway Trucks 4 8.00 300 0.38
Phase 1 Interim - mechanical Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - electrical Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 2 - demolition Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - demolition Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - site work Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - mobilization Tractors/Loaders/Backhoes 1 7.00 97 0.37
Lagoon Intake - dredge Tractors/Loaders/Backhoes 1 8.00 97 0.37
Lagoon Intake - concrete Cement and Mortar Mixers 2 8.00 9 0.56
Phase 2 - mobilization Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 2 - site prep Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 2 - site work Welders 2 8.00 46 0.45
Lagoon Intake - concrete Off-Highway Trucks 2 8.00 300 0.38
Lagoon Intake - site work Welders 1 8.00 46 0.45
Phase 1 Interim - electrical Forklifts 2 7.00 89 0.20
Lagoon Intake - mechanical Welders 1 8.00 46 0.45
Lagoon Intake - electrical Welders 1 8.00 46 0.45
Phase 1 Interim - concrete Forklifts 1 8.00 89 0.20
Phase 2 - concrete Generator Sets 1 8.00 84 0.74
Phase 1 Interim - mechanical Welders 2 8.00 46 0.45
Phase 1 Interim - electrical Welders 2 8.00 46 0.45
Phase 1 Interim - site work Excavators 1 8.00 158 0.38
Phase 1 Interim - site prep Tractors/Loaders/Backhoes 1 8.00 97 0.37
Phase 1 Interim - site work Bore/Drill Rigs 1 2.00 221 0.50
Lagoon Intake - concrete Generator Sets 1 8.00 84 0.74
Phase 1 Interim - site work Generator Sets 1 8.00 84 0.74
Phase 1 Interim - concrete Generator Sets 1 8.00 84 0.74
Phase 1 Interim - mechanical Generator Sets 1 8.00 84 0.74
Lagoon Intake - dredge Graders 1 8.00 187 0.41
Phase 1 Interim - concrete Off-Highway Trucks 2 8.00 300 0.38
Lagoon Intake - site work Off-Highway Trucks 4 8.00 300 0.38
Phase 2 - demolition Rubber Tired Dozers 1 8.00 247 0.40
Lagoon Intake - demolition Rubber Tired Dozers 1 8.00 247 0.40
Phase 1 Interim - demolition Rubber Tired Dozers 1 8.00 247 0.40
Phase 2 - concrete Welders 3 8.00 46 0.45
Lagoon Intake - concrete Welders 3 8.00 46 0.45
Phase 1 Interim - site work Welders 3 8.00 46 0.45
Phase 1 Interim - concrete Welders 3 8.00 46 0.45
Hauling
Vehicle
Class
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
10.80
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle
Class
Phase 2 - concrete 10 15.00 10.00 0.00
Phase 2 - site work 7 15.00 5.00 0.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Lagoon Intake -
concrete
10 15.00 10.00 0.00
Lagoon Intake - site
work
7 25.00 5.00 0.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Lagoon Intake -
electrical
5 15.00 5.00 0.00
Lagoon Intake -
mechanical
6 15.00 5.00 0.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Phase 1 Interim -
concrete
9 15.00 10.00 0.00
Phase 1 Interim - site
work
9 15.00 5.00 0.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Phase 1 Interim -
electrical
7 15.00 5.00 0.00
Phase 1 Interim -
mechanical
9 15.00 5.00 0.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Lagoon Intake -
demolition
6 25.00 0.00 0.00
Phase 2 - demolition 6 15.00 0.00 18.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Phase 1 Interim -
mobilization
1 10.00 5.00 0.00
Phase 1 Interim -
demolition
6 15.00 0.00 76.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Phase 1 Interim - site
prep
2 10.00 5.00 0.00
Lagoon Intake -
dredge
5 25.00 5.00 626.00
HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80
10.80 7.30 20.00 LD_Mix HDT_Mix
Phase 2 - site prep 2 15.00 5.00 0.00
Phase 2 - mobilization 1 10.00 5.00 0.00
20.00 LD_Mix HDT_Mix HHDT
7.30 20.00 LD_Mix HDT_Mix HHDT
10.80 7.30
3.1 Mitigation Measures Construction
3.2 Phase 1 Interim - mobilization - 2019
Unmitigated Construction On-Site
NOx CO SO2 Fugitive PM10 Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2ROG NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Exhaust PM10 PM10 Total
Off-Road 0.2037 2.0452 2.0148 2.7200e-
003
0.1365 0.1365 0.1256 0.1256 269.0991 269.0991 0.0851 271.2276
Total 0.2037 2.0452 2.0148 2.7200e-
003
0.0851 271.22760.1365 0.1365 0.1256 0.1256
SO2 Fugitive
PM10
Exhaust
PM10
269.0991 269.0991
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0444 0.0308 0.2924 8.2000e-
004
0.0822 5.9000e-
004
0.0827 0.0218 5.4000e-
004
0.0223 81.6914 81.6914 2.6400e-
003
81.7573
Total 0.0684 0.6512 0.4698 2.1700e-
003
0.0148 226.31130.1160 4.9800e-
003
0.1210 0.0315 4.7400e-
003
0.0363
SO2 Fugitive
PM10
Exhaust
PM10
225.9415 225.9415
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 0.2037 2.0452 2.0148 2.7200e-
003
0.1365 0.1365 0.1256 0.1256 0.0000 269.0991 269.0991 0.0851 271.2276
Total 0.2037 2.0452 2.0148 2.7200e-
003
0.0851 271.22760.1365 0.1365 0.1256 0.1256
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 269.0991 269.0991
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0444 0.0308 0.2924 8.2000e-
004
0.0822 5.9000e-
004
0.0827 0.0218 5.4000e-
004
0.0223 81.6914 81.6914 2.6400e-
003
81.7573
Total 0.0684 0.6512 0.4698 2.1700e-
003
0.0148 226.31130.1160 4.9800e-
003
0.1210 0.0315 4.7400e-
003
0.0363 225.9415 225.9415
3.3 Phase 1 Interim - site prep - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 0.4935 5.0192 5.5659 8.2700e-
003
0.2854 0.2854 0.2626 0.2626 818.6674 818.6674 0.2590 825.1429
Total 0.4935 5.0192 5.5659 8.2700e-
003
0.2590 825.14290.2854 0.2854 0.2626 0.2626
SO2 Fugitive
PM10
Exhaust
PM10
818.6674 818.6674
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0444 0.0308 0.2924 8.2000e-
004
0.0822 5.9000e-
004
0.0827 0.0218 5.4000e-
004
0.0223 81.6914 81.6914 2.6400e-
003
81.7573
Total 0.0684 0.6512 0.4698 2.1700e-
003
0.0148 226.31130.1160 4.9800e-
003
0.1210 0.0315 4.7400e-
003
0.0363
SO2 Fugitive
PM10
Exhaust
PM10
225.9415 225.9415
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 0.4935 5.0192 5.5659 8.2700e-
003
0.2854 0.2854 0.2626 0.2626 0.0000 818.6674 818.6674 0.2590 825.1429
Total 0.4935 5.0192 5.5659 8.2700e-
003
0.2590 825.14290.2854 0.2854 0.2626 0.2626
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 818.6674 818.6674
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0444 0.0308 0.2924 8.2000e-
004
0.0822 5.9000e-
004
0.0827 0.0218 5.4000e-
004
0.0223 81.6914 81.6914 2.6400e-
003
81.7573
Total 0.0684 0.6512 0.4698 2.1700e-
003
0.0148 226.31130.1160 4.9800e-
003
0.1210 0.0315 4.7400e-
003
0.0363 225.9415 225.9415
3.4 Phase 1 Interim - demolition - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Fugitive Dust 1.3000 0.0000 1.3000 0.1969 0.0000 0.1969 0.0000 0.0000
Off-Road 4.7133 48.1506 27.7759 0.0683 2.1386 2.1386 1.9859 1.9859 6,731.648
4
6,731.6484 1.9840 6,781.249
0
Total 4.7133 48.1506 27.7759 0.0683 1.9840 6,781.249
0
1.3000 2.1386 3.4386 0.1969 1.9859 2.1827
SO2 Fugitive
PM10
Exhaust
PM10
6,731.648
4
6,731.6484
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.0678 2.3062 0.5281 5.9300e-
003
0.1328 8.8200e-
003
0.1416 0.0364 8.4300e-
003
0.0448 646.6907 646.6907 0.0603 648.1986
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
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.1344 2.3524 0.9667 7.1600e-
003
0.0643 770.83450.2560 9.7000e-
003
0.2657 0.0691 9.2400e-
003
0.0783
SO2 Fugitive
PM10
Exhaust
PM10
769.2278 769.2278
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Fugitive Dust 1.3000 0.0000 1.3000 0.1969 0.0000 0.1969 0.0000 0.0000
Off-Road 4.7133 48.1506 27.7759 0.0683 2.1386 2.1386 1.9859 1.9859 0.0000 6,731.648
4
6,731.6484 1.9840 6,781.249
0
Total 4.7133 48.1506 27.7759 0.0683 1.9840 6,781.249
0
1.3000 2.1386 3.4386 0.1969 1.9859 2.1827
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 6,731.648
4
6,731.6484
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.0678 2.3062 0.5281 5.9300e-
003
0.1328 8.8200e-
003
0.1416 0.0364 8.4300e-
003
0.0448 646.6907 646.6907 0.0603 648.1986
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
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.1344 2.3524 0.9667 7.1600e-
003
0.0643 770.83450.2560 9.7000e-
003
0.2657 0.0691 9.2400e-
003
0.0783 769.2278 769.2278
3.5 Phase 1 Interim - site work - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 4.4242 38.2047 27.7072 0.0619 1.7899 1.7899 1.6887 1.6887 5,960.877
1
5,960.8771 1.6354 6,001.762
7
Total 4.4242 38.2047 27.7072 0.0619 1.6354 6,001.762
7
1.7899 1.7899 1.6887 1.6887
SO2 Fugitive
PM10
Exhaust
PM10
5,960.877
1
5,960.8771
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474
SO2 Fugitive
PM10
Exhaust
PM10
266.7872 266.7872
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 4.4242 38.2047 27.7072 0.0619 1.7899 1.7899 1.6887 1.6887 0.0000 5,960.877
1
5,960.8771 1.6354 6,001.762
6
Total 4.4242 38.2047 27.7072 0.0619 1.6354 6,001.762
6
1.7899 1.7899 1.6887 1.6887
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 5,960.877
1
5,960.8771
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474 266.7872 266.7872
3.6 Phase 1 Interim - concrete - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 3.6787 29.9441 21.5464 0.0459 1.4671 1.4671 1.3941 1.3941 4,338.170
5
4,338.1705 1.1005 4,365.684
0
Total 3.6787 29.9441 21.5464 0.0459 1.1005 4,365.684
0
1.4671 1.4671 1.3941 1.3941
SO2 Fugitive
PM10
Exhaust
PM10
4,338.170
5
4,338.1705
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0480 1.2409 0.3549 2.6900e-
003
0.0677 8.7800e-
003
0.0765 0.0195 8.4000e-
003
0.0279 288.5003 288.5003 0.0243 289.1081
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.1146 1.2870 0.7935 3.9200e-
003
0.0283 411.74400.1909 9.6600e-
003
0.2006 0.0522 9.2100e-
003
0.0614
SO2 Fugitive
PM10
Exhaust
PM10
411.0373 411.0373
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 3.6787 29.9441 21.5464 0.0459 1.4671 1.4671 1.3941 1.3941 0.0000 4,338.170
5
4,338.1705 1.1005 4,365.684
0
Total 3.6787 29.9441 21.5464 0.0459 1.1005 4,365.684
0
1.4671 1.4671 1.3941 1.3941
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 4,338.170
5
4,338.1705
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0480 1.2409 0.3549 2.6900e-
003
0.0677 8.7800e-
003
0.0765 0.0195 8.4000e-
003
0.0279 288.5003 288.5003 0.0243 289.1081
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.1146 1.2870 0.7935 3.9200e-
003
0.0283 411.74400.1909 9.6600e-
003
0.2006 0.0522 9.2100e-
003
0.0614 411.0373 411.0373
3.7 Phase 1 Interim - mechanical - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 3.2117 25.8950 21.8839 0.0368 1.5330 1.5330 1.4824 1.4824 3,465.452
4
3,465.4524 0.5659 3,479.600
8
Total 3.2117 25.8950 21.8839 0.0368 0.5659 3,479.600
8
1.5330 1.5330 1.4824 1.4824
SO2 Fugitive
PM10
Exhaust
PM10
3,465.452
4
3,465.4524
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474
SO2 Fugitive
PM10
Exhaust
PM10
266.7872 266.7872
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 3.2117 25.8950 21.8839 0.0368 1.5330 1.5330 1.4824 1.4824 0.0000 3,465.452
4
3,465.4524 0.5659 3,479.600
8
Total 3.2117 25.8950 21.8839 0.0368 0.5659 3,479.600
8
1.5330 1.5330 1.4824 1.4824
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 3,465.452
4
3,465.4524
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474 266.7872 266.7872
3.8 Phase 1 Interim - electrical - 2019
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 2.2311 17.8703 14.0230 0.0232 1.0295 1.0295 0.9811 0.9811 2,181.553
2
2,181.5532 0.4706 2,193.319
3
Total 2.2311 17.8703 14.0230 0.0232 0.4706 2,193.319
3
1.0295 1.0295 0.9811 0.9811
SO2 Fugitive
PM10
Exhaust
PM10
2,181.553
2
2,181.5532
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474
SO2 Fugitive
PM10
Exhaust
PM10
266.7872 266.7872
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 2.2311 17.8703 14.0230 0.0232 1.0295 1.0295 0.9811 0.9811 0.0000 2,181.553
2
2,181.5532 0.4706 2,193.319
3
Total 2.2311 17.8703 14.0230 0.0232 0.4706 2,193.319
3
1.0295 1.0295 0.9811 0.9811
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 2,181.553
2
2,181.5532
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0240 0.6204 0.1775 1.3500e-
003
0.0339 4.3900e-
003
0.0382 9.7400e-
003
4.2000e-
003
0.0139 144.2501 144.2501 0.0122 144.5540
Worker 0.0666 0.0462 0.4386 1.2300e-
003
0.1232 8.8000e-
004
0.1241 0.0327 8.1000e-
004
0.0335 122.5371 122.5371 3.9500e-
003
122.6359
Total 0.0906 0.6666 0.6160 2.5800e-
003
0.0161 267.18990.1571 5.2700e-
003
0.1623 0.0424 5.0100e-
003
0.0474 266.7872 266.7872
3.9 Phase 2 - mobilization - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 0.1647 1.6756 2.2379 3.1100e-
003
0.0901 0.0901 0.0829 0.0829 301.2390 301.2390 0.0974 303.6746
Total 0.1647 1.6756 2.2379 3.1100e-
003
0.0974 303.67460.0901 0.0901 0.0829 0.0829
SO2 Fugitive
PM10
Exhaust
PM10
301.2390 301.2390
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0372 0.0230 0.2314 7.4000e-
004
0.0822 5.6000e-
004
0.0827 0.0218 5.1000e-
004
0.0223 73.6526 73.6526 2.0100e-
003
73.7028
Total 0.0520 0.5025 0.3681 2.0400e-
003
0.0127 214.52170.1160 1.5200e-
003
0.1175 0.0315 1.4300e-
003
0.0330
SO2 Fugitive
PM10
Exhaust
PM10
214.2039 214.2039
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 0.1647 1.6756 2.2379 3.1100e-
003
0.0901 0.0901 0.0829 0.0829 0.0000 301.2390 301.2390 0.0974 303.6746
Total 0.1647 1.6756 2.2379 3.1100e-
003
0.0974 303.67460.0901 0.0901 0.0829 0.0829
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 301.2390 301.2390
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0372 0.0230 0.2314 7.4000e-
004
0.0822 5.6000e-
004
0.0827 0.0218 5.1000e-
004
0.0223 73.6526 73.6526 2.0100e-
003
73.7028
Total 0.0520 0.5025 0.3681 2.0400e-
003
0.0127 214.52170.1160 1.5200e-
003
0.1175 0.0315 1.4300e-
003
0.0330 214.2039 214.2039
3.10 Phase 2 - site prep - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 0.3671 3.4526 5.4931 8.2800e-
003
0.1760 0.1760 0.1620 0.1620 801.2542 801.2542 0.2591 807.7328
Total 0.3671 3.4526 5.4931 8.2800e-
003
0.2591 807.73280.1760 0.1760 0.1620 0.1620
SO2 Fugitive
PM10
Exhaust
PM10
801.2542 801.2542
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441
SO2 Fugitive
PM10
Exhaust
PM10
251.0302 251.0302
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 0.3671 3.4526 5.4931 8.2800e-
003
0.1760 0.1760 0.1620 0.1620 0.0000 801.2542 801.2542 0.2591 807.7328
Total 0.3671 3.4526 5.4931 8.2800e-
003
0.2591 807.73280.1760 0.1760 0.1620 0.1620
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 801.2542 801.2542
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441 251.0302 251.0302
3.11 Phase 2 - demolition - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Fugitive Dust 0.3250 0.0000 0.3250 0.0492 0.0000 0.0492 0.0000 0.0000
Off-Road 3.1393 27.0287 22.7658 0.0625 1.1793 1.1793 1.0969 1.0969 6,038.820
8
6,038.8208 1.7937 6,083.663
9
Total 3.1393 27.0287 22.7658 0.0625 1.7937 6,083.663
9
0.3250 1.1793 1.5043 0.0492 1.0969 1.1462
SO2 Fugitive
PM10
Exhaust
PM10
6,038.820
8
6,038.8208
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.0129 0.4254 0.1189 1.3400e-
003
0.0315 1.2200e-
003
0.0327 8.6200e-
003
1.1700e-
003
9.7900e-
003
147.6149 147.6149 0.0137 147.9582
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
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0687 0.4599 0.4660 2.4500e-
003
0.0168 258.51250.1547 2.0500e-
003
0.1567 0.0413 1.9400e-
003
0.0432
SO2 Fugitive
PM10
Exhaust
PM10
258.0937 258.0937
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Fugitive Dust 0.3250 0.0000 0.3250 0.0492 0.0000 0.0492 0.0000 0.0000
Off-Road 3.1393 27.0287 22.7658 0.0625 1.1793 1.1793 1.0969 1.0969 0.0000 6,038.820
8
6,038.8208 1.7937 6,083.663
9
Total 3.1393 27.0287 22.7658 0.0625 1.7937 6,083.663
9
0.3250 1.1793 1.5043 0.0492 1.0969 1.1462
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 6,038.820
8
6,038.8208
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.0129 0.4254 0.1189 1.3400e-
003
0.0315 1.2200e-
003
0.0327 8.6200e-
003
1.1700e-
003
9.7900e-
003
147.6149 147.6149 0.0137 147.9582
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
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0687 0.4599 0.4660 2.4500e-
003
0.0168 258.51250.1547 2.0500e-
003
0.1567 0.0413 1.9400e-
003
0.0432 258.0937 258.0937
3.12 Phase 2 - site work - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 3.1121 24.7501 22.3777 0.0615 1.0441 1.0441 0.9826 0.9826 5,863.956
7
5,863.9567 1.6401 5,904.958
4
Total 3.1121 24.7501 22.3777 0.0615 1.6401 5,904.958
4
1.0441 1.0441 0.9826 0.9826
SO2 Fugitive
PM10
Exhaust
PM10
5,863.956
7
5,863.9567
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441
SO2 Fugitive
PM10
Exhaust
PM10
251.0302 251.0302
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 3.1121 24.7501 22.3777 0.0615 1.0441 1.0441 0.9826 0.9826 0.0000 5,863.956
7
5,863.9567 1.6401 5,904.958
4
Total 3.1121 24.7501 22.3777 0.0615 1.6401 5,904.958
4
1.0441 1.0441 0.9826 0.9826
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 5,863.956
7
5,863.9567
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441 251.0302 251.0302
3.13 Phase 2 - concrete - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 2.7177 20.9587 19.6774 0.0458 0.9188 0.9188 0.8746 0.8746 4,263.533
8
4,263.5338 1.0580 4,289.983
7
Total 2.7177 20.9587 19.6774 0.0458 1.0580 4,289.983
7
0.9188 0.9188 0.8746 0.8746
SO2 Fugitive
PM10
Exhaust
PM10
4,263.533
8
4,263.5338
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0297 0.9591 0.2736 2.6100e-
003
0.0677 1.9200e-
003
0.0696 0.0195 1.8300e-
003
0.0213 281.1026 281.1026 0.0214 281.6377
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0854 0.9936 0.6206 3.7200e-
003
0.0244 392.19200.1909 2.7500e-
003
0.1937 0.0522 2.6000e-
003
0.0548
SO2 Fugitive
PM10
Exhaust
PM10
391.5815 391.5815
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 2.7177 20.9587 19.6774 0.0458 0.9188 0.9188 0.8746 0.8746 0.0000 4,263.533
8
4,263.5338 1.0580 4,289.983
7
Total 2.7177 20.9587 19.6774 0.0458 1.0580 4,289.983
7
0.9188 0.9188 0.8746 0.8746
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 4,263.533
8
4,263.5338
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0297 0.9591 0.2736 2.6100e-
003
0.0677 1.9200e-
003
0.0696 0.0195 1.8300e-
003
0.0213 281.1026 281.1026 0.0214 281.6377
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0854 0.9936 0.6206 3.7200e-
003
0.0244 392.19200.1909 2.7500e-
003
0.1937 0.0522 2.6000e-
003
0.0548 391.5815 391.5815
3.14 Lagoon Intake - dredge - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Fugitive Dust 0.6005 0.0000 0.6005 0.0679 0.0000 0.0679 0.0000 0.0000
Off-Road 2.5300 23.0987 15.8781 0.0550 0.8667 0.8667 0.7974 0.7974 5,319.214
8
5,319.2148 1.7203 5,362.223
3
Total 2.5300 23.0987 15.8781 0.0550 1.7203 5,362.223
3
0.6005 0.8667 1.4673 0.0679 0.7974 0.8653
SO2 Fugitive
PM10
Exhaust
PM10
5,319.214
8
5,319.2148
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.4485 14.7941 4.1363 0.0467 1.0939 0.0424 1.1363 0.2998 0.0406 0.3404 5,133.718
3
5,133.7183 0.4776 5,145.657
7
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.5563 15.3311 4.8515 0.0498 0.4933 5,470.733
7
1.3331 0.0448 1.3778 0.3640 0.0428 0.4068
SO2 Fugitive
PM10
Exhaust
PM10
5,458.401
0
5,458.4010
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Fugitive Dust 0.6005 0.0000 0.6005 0.0679 0.0000 0.0679 0.0000 0.0000
Off-Road 2.5300 23.0987 15.8781 0.0550 0.8667 0.8667 0.7974 0.7974 0.0000 5,319.214
8
5,319.2148 1.7203 5,362.223
3
Total 2.5300 23.0987 15.8781 0.0550 1.7203 5,362.223
3
0.6005 0.8667 1.4673 0.0679 0.7974 0.8653
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 5,319.214
8
5,319.2148
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Hauling 0.4485 14.7941 4.1363 0.0467 1.0939 0.0424 1.1363 0.2998 0.0406 0.3404 5,133.718
3
5,133.7183 0.4776 5,145.657
7
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.5563 15.3311 4.8515 0.0498 0.4933 5,470.733
7
1.3331 0.0448 1.3778 0.3640 0.0428 0.4068 5,458.401
0
5,458.4010
3.15 Lagoon Intake - demolition - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 2.3556 21.0769 17.7941 0.0429 0.9629 0.9629 0.8979 0.8979 4,141.932
2
4,141.9322 1.1802 4,171.438
1
Total 2.3556 21.0769 17.7941 0.0429 1.1802 4,171.438
1
0.0000 0.9629 0.9629 0.0000 0.8979 0.8979
SO2 Fugitive
PM10
Exhaust
PM10
4,141.932
2
4,141.9322
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
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
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.0929 0.0575 0.5784 1.8500e-
003
5.0300e-
003
184.25710.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558
SO2 Fugitive
PM10
Exhaust
PM10
184.1314 184.1314
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Fugitive Dust 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 2.3556 21.0769 17.7941 0.0429 0.9629 0.9629 0.8979 0.8979 0.0000 4,141.932
2
4,141.9322 1.1802 4,171.438
1
Total 2.3556 21.0769 17.7941 0.0429 1.1802 4,171.438
1
0.0000 0.9629 0.9629 0.0000 0.8979 0.8979
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 4,141.932
2
4,141.9322
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
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
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.0929 0.0575 0.5784 1.8500e-
003
5.0300e-
003
184.25710.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314
3.16 Lagoon Intake - site work - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 3.5471 29.2847 28.1957 0.0723 1.2937 1.2937 1.2320 1.2320 6,921.637
4
6,921.6374 1.6850 6,963.762
5
Total 3.5471 29.2847 28.1957 0.0723 1.6850 6,963.762
5
1.2937 1.2937 1.2320 1.2320
SO2 Fugitive
PM10
Exhaust
PM10
6,921.637
4
6,921.6374
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.1078 0.5370 0.7152 3.1500e-
003
0.0157 325.07590.2392 2.3500e-
003
0.2416 0.0642 2.2000e-
003
0.0664
SO2 Fugitive
PM10
Exhaust
PM10
324.6827 324.6827
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 3.5471 29.2847 28.1957 0.0723 1.2937 1.2937 1.2320 1.2320 0.0000 6,921.637
4
6,921.6374 1.6850 6,963.762
5
Total 3.5471 29.2847 28.1957 0.0723 1.6850 6,963.762
5
1.2937 1.2937 1.2320 1.2320
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 6,921.637
4
6,921.6374
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0929 0.0575 0.5784 1.8500e-
003
0.2054 1.3900e-
003
0.2068 0.0545 1.2800e-
003
0.0558 184.1314 184.1314 5.0300e-
003
184.2571
Total 0.1078 0.5370 0.7152 3.1500e-
003
0.0157 325.07590.2392 2.3500e-
003
0.2416 0.0642 2.2000e-
003
0.0664 324.6827 324.6827
3.17 Lagoon Intake - concrete - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 2.7177 20.9587 19.6774 0.0458 0.9188 0.9188 0.8746 0.8746 4,263.533
8
4,263.5338 1.0580 4,289.983
7
Total 2.7177 20.9587 19.6774 0.0458 1.0580 4,289.983
7
0.9188 0.9188 0.8746 0.8746
SO2 Fugitive
PM10
Exhaust
PM10
4,263.533
8
4,263.5338
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0297 0.9591 0.2736 2.6100e-
003
0.0677 1.9200e-
003
0.0696 0.0195 1.8300e-
003
0.0213 281.1026 281.1026 0.0214 281.6377
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0854 0.9936 0.6206 3.7200e-
003
0.0244 392.19200.1909 2.7500e-
003
0.1937 0.0522 2.6000e-
003
0.0548
SO2 Fugitive
PM10
Exhaust
PM10
391.5815 391.5815
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 2.7177 20.9587 19.6774 0.0458 0.9188 0.9188 0.8746 0.8746 0.0000 4,263.533
8
4,263.5338 1.0580 4,289.983
7
Total 2.7177 20.9587 19.6774 0.0458 1.0580 4,289.983
7
0.9188 0.9188 0.8746 0.8746
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 4,263.533
8
4,263.5338
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0297 0.9591 0.2736 2.6100e-
003
0.0677 1.9200e-
003
0.0696 0.0195 1.8300e-
003
0.0213 281.1026 281.1026 0.0214 281.6377
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0854 0.9936 0.6206 3.7200e-
003
0.0244 392.19200.1909 2.7500e-
003
0.1937 0.0522 2.6000e-
003
0.0548 391.5815 391.5815
3.18 Lagoon Intake - mechanical - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 1.6543 14.3163 13.1748 0.0295 0.6540 0.6540 0.6185 0.6185 2,797.851
4
2,797.8514 0.6907 2,815.119
0
Total 1.6543 14.3163 13.1748 0.0295 0.6907 2,815.119
0
0.6540 0.6540 0.6185 0.6185
SO2 Fugitive
PM10
Exhaust
PM10
2,797.851
4
2,797.8514
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441
SO2 Fugitive
PM10
Exhaust
PM10
251.0302 251.0302
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 1.6543 14.3163 13.1748 0.0295 0.6540 0.6540 0.6185 0.6185 0.0000 2,797.851
4
2,797.8514 0.6907 2,815.119
0
Total 1.6543 14.3163 13.1748 0.0295 0.6907 2,815.119
0
0.6540 0.6540 0.6185 0.6185
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 2,797.851
4
2,797.8514
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441 251.0302 251.0302
3.19 Lagoon Intake - electrical - 2022
Unmitigated Construction On-Site
SO2 Fugitive PM10 Exhaust PM10 PM2.5 Total Bio- CO2 NBio- CO2ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10 Total Fugitive PM2.5 Exhaust PM2.5
Off-Road 1.2580 11.3060 10.6558 0.0195 0.5445 0.5445 0.5178 0.5178 1,838.612
4
1,838.6124 0.3805 1,848.124
1
Total 1.2580 11.3060 10.6558 0.0195 0.3805 1,848.124
1
0.5445 0.5445 0.5178 0.5178
SO2 Fugitive
PM10
Exhaust
PM10
1,838.612
4
1,838.6124
PM2.5
Total
Bio- CO2 NBio-
CO2
Unmitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.0137 251.37310.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441
SO2 Fugitive
PM10
Exhaust
PM10
251.0302 251.0302
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction On-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
Off-Road 1.2580 11.3060 10.6558 0.0195 0.5445 0.5445 0.5178 0.5178 0.0000 1,838.612
4
1,838.6124 0.3805 1,848.124
1
Total 1.2580 11.3060 10.6558 0.0195 0.3805 1,848.124
1
0.5445 0.5445 0.5178 0.5178
SO2 Fugitive
PM10
Exhaust
PM10
0.0000 1,838.612
4
1,838.6124
PM2.5
Total
Bio- CO2 NBio-
CO2
Mitigated Construction Off-Site
ROG NOx CO Total CO2 CH4 N2O CO2e
Category lb/day lb/day
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
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
Vendor 0.0148 0.4795 0.1368 1.3000e-
003
0.0339 9.6000e-
004
0.0348 9.7400e-
003
9.2000e-
004
0.0107 140.5513 140.5513 0.0107 140.8189
Worker 0.0558 0.0345 0.3470 1.1100e-
003
0.1232 8.3000e-
004
0.1241 0.0327 7.7000e-
004
0.0335 110.4788 110.4788 3.0200e-
003
110.5543
Total 0.0706 0.5140 0.4838 2.4100e-
003
0.1571 1.7900e-
003
0.1589 0.0424 1.6900e-
003
0.0441 251.0302 251.0302 0.0137 251.3731
Operational/Maintenance Emissions
Vessel 1Name Crew BoatVessel Type Crew and SupplyMain Engine Power (hp) 250Engine Power Range (Low) 176Engine Power Range (High) 250Main Engine Power (kW) 186.425Number of Main Engines 1Auxiliary Engine Power (hp) 100Auxiliary Engine Power (kW) 74.57Number of Auxiliary Engines 1Main Engine Load Factor 0.45Auxiliary Engine Load Factor 0.43Main Engine Model Year2000Model Year Range (Low) 2000Model Year Range (High) 2003Main Engine Age 23Main Engine Useful Life 22Auxiliary Engine Model Year 2000Auxiliary Engine Age 23Auxiliary Engine Useful Life 22Brake Specific Fuel Consumption (g/hp‐h) 184Operational Time (hours/day) 4Work Days (days) 1Operational Year 2023Emissions Factorsg/kW‐h g/kW‐h g/kW‐h g/hp‐h g/kW‐h g/kW‐h g/hp‐hVessel Engines ROGNOxCOSOxPM10PM2.5CO2#REF! Main 0.68 7.31 1.97 #REF! 0.36 0.3528 545.6Auxiliary 0.81 7.31 2.78 #REF! 0.32 0.3136 545.6Crew Boat Main 0.68 7.31 1.97 #REF! 0.36 0.3528 545.6Auxiliary 0.81 7.31 2.78 #REF! 0.32 0.3136 545.6Engine Load Factor#REF! Crew BoatMain0.50 0.45Auxiliary0.31 0.43Engine Useful Life#REF! Crew BoatMain21 22Auxiliary23 22
Engine Fuel Correction FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2#REF! Main1 0.93 1 1 0.72 0.72 1Auxiliary1 0.93 1 1 0.72 0.72 1Crew Boat Main1 0.93 1 1 0.72 0.72 1Auxiliary1 0.93 1 1 0.72 0.72 1Engine Deterioration FactorVessel Engines ROGNOxCOSOxPM10PM2.5CO2#REF! Main#REF! #REF! #REF! 1 #REF! #REF! 1Auxiliary#REF! #REF! #REF! 1 #REF! #REF! 1Crew Boat Main0.28 0.14 0.16 1 0.44 0.44 1Auxiliary0.28 0.14 0.16 1 0.44 0.44 1Time to and from Port of San Diego#REF! Crew BoatDistance (nautical miles) a37.2 37.2Speed (knots) b12 12Time (hours)3.1 3.1Max. Daily Number of Trips to or from Port00Total Number of Trips to or from Port00a. Distance based on route from Port of San Diego to Agua Hedionda Lagoon.b. Conservatively assumed that the Santa Barbara Channel Vessel Speed Speed Reduction Trial would apply as slowest speed.
Maximum Daily Emissions From Construction Activitiespounds/day MT/dayVessel Engines ROG NOx CO SOx PM10 PM2.5 CO2Crew Boat Main 0.62 5.64 1.66 0.01 0.26 0.26 0.46Auxiliary 0.28 2.15 0.89 0.00 0.09 0.09 0.13Total 0.91 7.79 2.55 0.01 0.35 0.35 0.59*assumes crew boat with 250 hp main engine, 100 hp auxiliary engine (both from 2000) operating in 2023 for 4 hours per day
Maximum Daily Emissions From Construction Activitiespounds/day MT/dayVessel Engines ROG NOx CO SOx PM10 PM2.5 CO2Crew Boat Main 0.65 5.77 1.70 0.01 0.28 0.27 0.50Auxiliary 0.30 2.20 0.92 0.00 0.10 0.09 0.14Total 0.95 7.97 2.62 0.01 0.38 0.37 0.65*assumes crew boat with 250 hp main engine, 100 hp auxiliary engine (both from 2000) operating in 2023 for 4 hours per day
Passive Screens Maintenance/Cleaning Marine Vessel GHG EmissionsMT/yearVessel Engines CO2Crew Boat Main 6.03Auxiliary 1.72Total 7.74*assumes crew boat with 250 hp main engine, 100 hp auxiliary engine (both from 2000) operating in 2023 for 4 hours per day and 12 days a yearActive Screens Maintenance/Cleaning Marine Vessel GHG EmissionsMT/yearVessel Engines CO2Crew Boat Main 3.01Auxiliary 0.86Total 3.87*assumes crew boat with 250 hp main engine, 100 hp auxiliary engine (both from 2000) operating in 2023 for 4 hours per day and 6 days a yearIndirect GHG Emissions from Rotating Screen Electricity Use (Power Plant Emissions)Operations Annual Electrical Use: 70,080 hp‐hr/year0.746 kWh/hp‐hr52,280 kWh (kilowatt hours)/year52 MWh (megawatt hours)/yearCO2 AnnualEmission Factor* Project GHGs Equivalent CO2 EquivalentIndirect GHG gases lb/MWh Electricity MWh metric tons Factor Emissions (metric tons)Carbon Dioxide (CO2) 592.74 52 14.06 1 14.06Nitrous Oxide (N2O) 0.006 52 0.0001 298 0.04Methane (CH4) 0.029 52 0.0007 25 0.02Total Indirect GHG Emissions from Rotating Screen Operations Electricity Use= 14.12* Emission factors for CO2, CH4, and N2O are from the CalEEMod software version 2016.3.1 for SDG&E.CO2 adjusted based on 33% RPS by 2020Total Active/Rotating Screen Annual Operational GHG Emissions:17.99 MT CO2E/yearAnnual