HomeMy WebLinkAbout2018-03-07; Planning Commission; ; SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5
The City of Carlsbad Planning Division
A REPORT TO THE PLANNING COMMISSION
Item No.
Application complete date: January 25, 2018
P.C. AGENDA OF: March 7, 2018 Project Planner: Pam Drew
Project Engineer: Jason Geldert & Lindsay Leahy
SUBJECT: SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION
FLOW CONTROL FACILITY 5 – Request for approval of a Site Development Plan,
Conditional Use Permit and Special Use Permit to construct: (1) a flow control facility
(FCF); (2) pressure reducing valve and vault (PRVV); (3) 1,615 linear feet of 14-inch
diameter cement mortar lined and coated steel pipe; (4) 525 linear feet of 16-inch
polyvinyl chloride (PVC) pipe; and (6) associated fixtures located at 5950 El Camino Real
and within the public rights-of-way on Faraday Avenue, Orion Street and El Camino Real
within Local Facilities Management Zone 5. The City Planner has determined that the
Fifth Addendum to the previously certified FEIR (03-05) is adequate pursuant to Section
15164(a) of the state CEQA Guidelines and a subsequent or supplemental EIR is not
required.
I. RECOMMENDATION
That the Planning Commission ADOPT Planning Commission Resolution No. 7290 APPROVING Site
Development Plan SDP 2017-0010, Conditional Use Permit CUP 2017-0012 and Special Use Permit SUP
2017-0007 and based on the findings and subject to the conditions contained therein.
II. PROJECT DESCRIPTION AND BACKGROUND
In 2006, the City of Carlsbad approved an amendment to the Precise Development Plan (PDP) granting
Poseidon Resources (Channelside) LLC (Poseidon) land use approvals to construct and operate an
approximately 50 million gallons a day (56,000 acre-feet per year) desalination plant and other
appurtenant and ancillary water and support facilities to produce potable water. The Carlsbad
Desalination Plant (Plant) is located on the Encina Power Station site, adjacent to the existing power plant,
located immediately south of the Agua Hedionda Lagoon.
Through an agreement with the San Diego County Water Authority (SDCWA), Carlsbad Municipal Water
District (CMWD) retained its rights to 2,500 acre-feet of drought-proof water per year to be received
directly from the desalination pipeline, providing approximately 16% of the Carlsbad Municipal Water
Districts water needs. CMWD’s 2012 Water Master Plan recommended the construction of the
Desalination Flow Control Facility 5 (FCF) to access this water directly rather than through SDCWA’s
system.
To allow for a secure connection to the desalination pipeline, CMWD will construct a turnout, FCF, and
pressure reducing valve and vault (PRVV) that will have a direct connection to the Carlsbad desalination
conveyance pipeline as it passes through CMWD’s service area on Faraday Avenue, just west of the Orion
Street intersection, on its way to the SDCWA’s Twin Oaks Valley Water Treatment Plant in San Marcos and
regional distribution system.
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The FCF and PRVV will be located at 5950 El Camino Real, the location of the CMWD Maintenance and
Operation facility. The FCF will be an above ground structure, consisting of split faced cement block and
stone coated steel shingle roof. The dimensions of the structure are 38 feet 6 inches long x 18 feet 9
inches wide x 15 feet 4 inches high. The PRVV will be a below ground structure accessible from the CMWD
property and housing the pressure reducing valve (PRV) and other fixtures. A 14-inch cement mortar lined
and coated steel pipe will extend from the desalination pipeline to the FCF, while a 16-inch PVC pipeline
will connect the PRV to CMWD’s water system at the intersection of El Camino Real and Orion Street.
The FCF structure would require the construction of a retaining wall, which would be between two and
eight feet high. Vehicular access to the FCF would be provided via two proposed driveway aprons on
Orion Street. The FCF would have a six-foot wrought iron perimeter fence with a gate at each driveway
apron.
Construction for the pipeline, FCF, PRVV and tie-ins is anticipated to take one year. Work on Faraday
Avenue and El Camino Real will be coordinated with the city Traffic Division and will be completed during
non-rush hour with approved traffic control in place. Partial lane closure on Orion Street will occur during
a portion of construction, however traffic and access to the Palomar Transfer Center and adjacent
businesses will be maintained during business hours in both directions throughout construction.
III. ANALYSIS
The proposed project is subject to the following regulations:
A. Planned Industrial (PI) General Plan Land Use designation;
B. Industrial Zone (M), Qualified Development Overlay Zone (Q) (Chapters 21.32 and 21.06 of the
Carlsbad Municipal Code (CMC));
C. Conditional Use Permit regulations (Chapter 21.42 of the CMC);
D. Special Use Permit - Scenic Preservation Overlay Zone regulations (Chapter 21.40 of the CMC and
the El Camino Real Corridor Development Standards);
E. McClellan-Palomar Airport Land Use Compatibility Plan; and
F. Growth Management – Local Facilities Management Plan Zone 5
The recommendation for approval of this project was developed by analyzing the project's consistency
with the applicable regulations and policies. The project's compliance with each of the above regulations
is discussed in detail in the sections below.
A. General Plan Land Use Designation – Planned Industrial (PI)
The Land Use and Community Design Element requires that public facilities be provided in the city
adequate for the projected population. The project complies with these provisions by providing a direct
connection to the SDCWA’s desalination pipeline. The project also complies with General Plan
sustainability goal 9-G.4 as outlined in Table 1 below:
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TABLE 1 – GENERAL PLAN COMPLIANCE
ELEMENT STANDARD PROJECT COMPLIANCE?
Sustainability Reduce the city’s
reliance on imported
water (Goal 9-G.4).
The direct connection will provide CMWD
more local control of the drought-resistant
desalination water. CMWD will purchase
2,500 acre-feet per year of treated, drought
resistant, water from the Carlsbad
Desalination Plant. The 2,500 acre-feet of
desalinated water represents approximately
16 percent of the potable water purchased
by CMWD in the 2017 calendar year.
Yes
B. Zoning – Industrial (M), Qualified Development Overlay Zone (Q)
The project has zoning designations of Industrial (M), with the Qualified Development Overlay (Q). The Q
zone requires approval of a SDP or amendment to an approved SDP for new development. The intent of
the overlay is to supplement the underlying zoning by providing additional regulations for development
within designated areas to ensure that projects will be compatible with surrounding development. As
designed, no special considerations or conditions other than compliance with city codes and regulations
are necessary to ensure that the project will be compatible with the existing development on adjacent
properties.
The Mobility Element of the General Plan designates the streets as Arterial (El Camino Real),
Employment/Transit Connector (Faraday Avenue) and Industrial (Orion Street), which permit public utility
facilities. The M-Q zone has no setback or building placement requirements/restrictions. Below grade
structures include the PRVV, pipeline and associated fixtures. As stated above, the only above grade
structure is the FCF, which would be 15 feet 4 inches above grade. As indicated in Table 2 below, the
proposed project meets the required findings for approval of a SDP.
TABLE 2 – SITE DEVELOPMENT PERMIT FINDINGS AND RESPONSES
FINDING RESPONSE
That the requested use is properly related to
the site, surroundings and environmental
settings, is consistent with the various
elements and objectives of the General Plan,
will not be detrimental to existing uses or to
uses specifically permitted in the area in which
the proposed use is to be located, and will not
adversely impact the site, surroundings or
traffic circulation.
The FCF, which is the only above grade structure, will be
located on an undeveloped, but disturbed, area between
Orion Street and the CMWD storage yard within the CMWD
facility. The general area is developed with commercial and
industrial land uses. The proposed landscaping and existing
mature trees will help screen and soften the one-story, 700
square-foot structure and retaining wall. One maintenance
vehicle trip per day is expected and will not impact the
traffic circulation.
Furthermore, the project will allow CMWD to receive 2,500
acre-feet of desalinated water per year which represents
approximately 16 percent of the potable, drought-resistant
water purchased by CMWD in the 2017 calendar year,
which is consistent with the city’s Sustainability Element.
Therefore, the utility accessories are consistent with all
applicable requirements of the General Plan and CMC.
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That the site for the intended use is adequate
in size and shape to accommodate the use.
The six-acre site is adequate in size and shape to
accommodate the proposed one-story, 700 square foot
utility structure, PRVV, piping and fixtures. The proposed
use complies with the required development and design
standards of the zoning requirements. No variances to
standards are proposed.
That all yards, setbacks, walls, fences,
landscaping, and other features necessary to
adjust the requested use to existing or
permitted future uses in the neighborhood will
be provided and maintained.
The FCF will provide on-site parking for the maintenance
vehicle, and the proposed walls, fences and landscaping will
be maintained. The proposed architectural treatment,
scale, and screening landscape will ensure the proposed
FCF structure is compatible with existing and potential
future development in the surrounding area.
That the street systems serving the proposed
development or use is adequate to properly
handle all traffic generated by the proposed
use.
The completion of the FCF would not result in an increase in
staffing that would create additional operational vehicle
trips other than one maintenance truck per day. As such,
the proposed project would not result in an increase in
traffic on local roadways during operations and
maintenance activities and; therefore, there will be no
impact on the existing street system.
C. Conditional Use Permit Regulations
The proposed project is a use which is allowed in all zones subject to the approval of a CUP. Staff
recommends that the required findings for approval of the CUP can be made as discussed in Table 3,
below.
TABLE 3 – CONDITIONAL USE PERMIT FINDINGS AND RESPONSES
FINDING RESPONSE
That the requested use is necessary or desirable
for the development of the community, and is in
harmony with the various elements and
objectives of the general plan, including, if
applicable, the certified local coastal program,
specific plan or master plan.
The project will provide CMWD with 2,500 acre-feet of
drought-resistant desalinated water which represents
approximately 16 percent of the potable water purchased
by CMWD in the 2017 calendar year, which is consistent
with the city’s Sustainability Element. The utility
accessories are consistent with all applicable
requirements of the General Plan and CMC.
That the site for the intended use is adequate in
size and shape to accommodate the use.
The six-acre site is adequate in size and shape to
accommodate the proposed one-story, 700 square foot
FCF, PRVV, piping and fixtures. The proposed use
complies with the required development and design
standards of the zoning requirements. No variances to
standards are proposed.
That the site for the proposed conditional use is
adequate in size and shape to accommodate the
yards, setbacks, walls, fences, parking, loading
facilities, buffer areas, landscaping and other
development features prescribed in this code and
required by the City Planner, Planning
As stated above, the six-acre site is adequate in size and
shape to accommodate the proposed one-story, 700
square foot, utility structure, PRVV, piping and fixtures.
There is adequate room for on-site parking for the
maintenance vehicle, retaining wall, perimeter fence and
landscaping.
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Commission or City Council, in order to integrate
the use with other uses in the neighborhood.
Furthermore, the proposed architectural treatment, small
scale, and screening landscape will ensure the proposed
FCF structure is compatible, and blends in, with
surrounding uses.
That the street system serving the proposed use
is adequate to properly handle all traffic
generated by the proposed use.
The completion of the FCF and PRVV would result in one
additional maintenance vehicle trip per day to the CMWD
facility. As such, the proposed project will not impact the
existing street system.
D. Special Use Permit - Scenic Preservation Overlay Zone regulations (Chapter 21.40 of the CMC and
the El Camino Real Corridor Development Standards)
A SUP is required for development within the El Camino Real Scenic Corridor Overlay Zone, where this
project is located. The purpose of the overlay is to preserve the scenic qualities and maintain and enhance
the appearance of the El Camino Real roadway through design concepts and development standards. This
section of El Camino Real is defined as Area 4, located from College Avenue to Cassia Road (2.1 miles).
The El Camino Real Corridor Development Standards identifies this area or segment as dominated with
research facilities, business parks and McClellan-Palomar Airport.
Many of the standards discussed in the regulations pertain to such details as signage, setbacks from
roadway, and roof equipment, which do not apply to the proposed project. The project would incorporate
other design features such as earth tone colors and landscaping to blend in with the surrounding area.
Overall, the project would not conflict with the El Camino Real Corridor Development Standards. The
proposed above-ground FCF faces Orion Street and would not be readily visible from El Camino Real.
Table 4 below explains how the project is consistent with the intent and applicable standards and Table 5
explains how the proposed project meets the required findings for approval of a SUP.
TABLE 4 – EL CAMINO REAL CORRIDOR STANDARDS COMPLIANCE
STANDARD REQUIRED/ALLOWED PROVIDED
Design Theme Campus type The one-story, 700 square foot building
will appear to the public as an
accessory building to the existing
CMWD campus.
Sidewalks As determined by staff There is an existing sidewalk along the
west side of Orion Street from El
Camino Real to Faraday Avenue.
Signs Free standard monument, not to
exceed five feet above street
grade.
None proposed
Max. Building Height 35 feet from pad grade 15 feet 4 inches from pad grade
Max. Grading Change 15 feet from existing grade 8 feet from grade (retaining wall)
Min. Setback from El Camino Real 30 feet minimum 430 feet landscaped setback
Roof Equipment No roof equipment can be visible
from adjacent streets.
None proposed
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TABLE 5 – SCENIC PRESERVATION OVERLAY FINDINGS AND RESPONSES
FINDING RESPONSE
The project is consistent with the purposes of
this Chapter and all other applicable
requirements on this code.
As stated above, the above grade structure (FCF) will be
430 feet east of ECR and will not impact the scenic qualities
and appearance of the roadway. The existing and proposed
vegetation will also shield the structure from the roadway.
The project is consistent with the general plan,
local coastal program, and applicable master or
specific plans.
The project will provide CMWD with 2,500 acre-feet of
drought-resistant desalinated water which represents
approximately 16 percent of the potable water purchased
by CMWD in the 2017 calendar year, which is consistent
with the city’s Sustainability Element. The utility
accessories are consistent with all applicable requirements
of the General Plan and Carlsbad Municipal Code (CMC).
The project will not adversely affect the scenic,
historical or cultural qualities of the property.
The FCF will be located at the CMWD’s Maintenance and
Operation facility, within an industrial area. The FCF will be
one-story and will not affect any scenic qualities in the area.
The project is conditioned to implement Cultural & Tribal
Resources mitigation measures, which require
archaeological and Native American monitors on site during
any ground disturbing activities. This will reduce any
historical or cultural impacts to less than significance.
E. McClellan-Palomar Airport Land Use Compatibility Plan
The project is consistent with the adopted McClellan-Palomar Airport Land Use Compatibility Plan
(ALUCP), as amended December 1, 2011. The proposed above-ground FCF structure is located less than
a quarter mile northeast of the airport. The site is partially within the Airport Influence Review Area 1 and
the 60-65 CNEL noise contour for McClellan-Palomar Airport. Public utilities is deemed a compatible use
within the 60-65 CNEL contour in the ALUCP. The ALUCP identifies that this type of use may be carried
out without interference from aircraft noise. The proposed FCF structure is located within the ALUCP
Safety Zone 3. Utilities and public works yards (where the FCF would be located) are compatible uses in
Safety Zone 3. Furthermore, the FCF would be visited by persons for occasional maintenance purposes
only, and would otherwise be unoccupied on any regular basis.
The FCF is also within the Airport Overflight Notification Area. However, recordation of an overflight
notification is only required for new residential uses, and therefore does not apply to this project. Finally,
the FCF’s maximum height does not exceed the threshold for any notification to the Federal Aviation
Administration (FAA). Per the FAA’s Part 77, Subpart C, height standards shown in Exhibit III-3 of the
ALUCP, the project’s proposed height would need to exceed 481 feet above mean sea level (MSL) before
notification to the FAA would be required. The project proposes a height of no more than 300 feet above
MSL so FAA notification is not required.
F. Growth Management (Chapter 21.90 of the CMC) and Local Facilities Management Zone 5
The project is located within Local Facilities Management Zone 5. The Zone 5 plan implements the
Citywide Facilities and Improvements Plan and was adopted to ensure that growth occurs in concert with
public facilities and service systems. The project will provide a direct connection to the SDCWA’s
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desalination pipeline and provide CMWD with a local source of drought-resistant water for approximately
16 percent of its potable water demand.
Furthermore, one maintenance vehicle would visit the facility once per day for project operations and will
not result in noticeable traffic increase and will not result in any substantial deterioration of the public
roadway system, nor generate a need for other governmental services, such as emergency services.
IV. ENVIRONMENTAL REVIEW
The City of Carlsbad prepared and certified the Carlsbad Precise Development Plan (PDP 00-02) and
Desalination Plant Final Environmental Impact Report (FEIR 03-05) for the Carlsbad Desalination Project
(Approved Project) on June 13, 2006 (Carlsbad 2006; SCH No. 2004041081). The FEIR analyzed all
components of the Approved Project, including a 50 million gallon per day (mgd) seawater desalination
plant and offsite water conveyance facilities located within the cities of Carlsbad, Oceanside, and Vista.
The city has determined that minor changes to the previously approved facilities are necessary. Pursuant
to Section 15381 of the California Environmental Quality Act (CEQA), the City of Carlsbad is the lead agency
for evaluating the potential environmental effects of the proposed changes.
As described in CEQA Guidelines Section 15164(a), “the lead agency…shall prepare an addendum to a
previously certified EIR if some changes or additions are necessary but none of the conditions described
in Section 15162 calling for the preparation of a subsequent EIR or negative declaration have occurred.”
As demonstrated in the attached addendum (Attachment 3), staff has reviewed the project changes, and
the Fifth Addendum prepared by Helix Environmental Planning, and found that none of the requirements
in CEQA Guidelines sections 15162 for a subsequent EIR have been triggered. Therefore, the revised
project is within the scope of the certified FEIR (03-05) and use of an addendum to document the project
changes is appropriate. CEQA Guidelines Section 15164 also notes an addendum need not be circulated
for public review but may simply be attached to the FEIR.
ATTACHMENTS:
1. Planning Commission Resolution No. 7290
2. Location Map
3. Fifth Addendum to FEIR 03-05
4. Colored Rendering
5. Reduced Exhibits
6. Exhibits “A” – “L” dated March 7, 2018
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Desalination Flow Control Facility 5
SDP 2017-0010/CUP 2017-0012/SUP 2017-0007
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ATTACHMENT 2
FIFTH ADDENDUM TO THE PRECISE DEVELOPMENT PLAN AND DESALINATION PLANT PROJECT FINAL ENVIRONMENTAL IMPACT REPORT (EIR 03-05) CITY OF CARLSBAD, CALIFORNIA
State Clearinghouse No. 2004041081
EIR Certified June 13, 2006
Prepared for:
City of Carlsbad
1635 Faraday Avenue
Carlsbad, California 92008-7314
Prepared by:
HELIX Environmental Planning
7578 El Cajon Boulevard
La Mesa, California 91942
January 2018
ATTACHMENT 3
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TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION/PROJECT BACKGROUND ........................................................................................ 1
2.0 PURPOSE OF THE ADDENDUM ........................................................................................................ 2
3.0 PROJECT LOCATION ......................................................................................................................... 3
4.0 DESCRIPTION OF APPROVED PROJECT ............................................................................................ 4
5.0 DESCRIPTION OF THE PROPOSED MODIFICATIONS TO THE APPROVED PROJECT .......................... 4
6.0 CITY PERMITS REQUIRED ................................................................................................................. 5
7.0 IDENTIFICATION OF ENVIRONMENTAL EFFECTS ............................................................................. 5
8.0 ENVIRONMENTAL ANALYSIS ............................................................................................................ 6
9.0 CUMULATIVE IMPACTS .................................................................................................................. 23
10.0 GROWTH INDUCING IMPACTS ....................................................................................................... 27
11.0 CONCLUSION .................................................................................................................................. 28
12.0 REFERENCES ................................................................................................................................... 29
ii
ACRONYMS AND ABBREVIATIONS
AB Assembly Bill
CAP Climate Action Plan
CARB California Air Resources Board
CCC California Coastal Commission
CCR California Code of Regulations
CEQA California Environmental Quality Act
CMWD Carlsbad Municipal Water District
CMU Concrete Masonry Unit
dB decibel
EIR Environmental Impact Report
FCF Flow Control Facility
FEIR Final Environmental Impact Report
GHG greenhouse gas
GHG Reduction Plan Energy Minimization and Greenhouse Gas Reduction Plan
mgd million gallons per day
PDP Precise Development Plan
PRVV Pressure Reducing Valve & Vault
ROW right-of-way
SCH State Clearinghouse
SDCWA San Diego County Water Authority
SWMP Stormwater Management Plan
SWPPP Stormwater Pollution Prevention Plan
Precise Development Plan and 1 January 2018
Desalination Plant Project - Fifth Addendum
1.0 INTRODUCTION/PROJECT BACKGROUND
The City of Carlsbad prepared and certified the Carlsbad Precise Development Plan (PDP 00-02) and
Desalination Plant Final Environmental Impact Report (FEIR 03-05) for the Carlsbad Desalination Project
(Approved Project) on June 13, 2006 (Carlsbad 2006; SCH No. 2004041081). The Carlsbad Desalination
Plant is located on the Encina Power Station site, adjacent to the existing power plant, located
immediately south of the Agua Hedionda Lagoon, within the City of Carlsbad, in northern San Diego
County. The FEIR analyzed all components of the Approved Project, including a 50 million gallon per day
(mgd) seawater desalination plant and offsite water conveyance facilities located within the cities of
Carlsbad, Oceanside, and Vista. The FEIR also evaluated long-term, off-site, underground flow control
vaults and an above ground pump station located in the City of Oceanside Corporation Yard.
The Approved Project was subsequently modified, and these minor changes were addressed in the First
Addendum to the FEIR that was approved by the City of Carlsbad on September 15, 2009 (Carlsbad
2009). The First Addendum documented changes to the footprint of the desalination plant and off-site
water conveyance facilities. Long term, offsite, underground flow control vaults were discussed in the
First Addendum and identified in general locations near the proposed project.
The FEIR documented that agencies other than the City of Carlsbad would use the FEIR when making a
decision on aspects of the Approved Project that require their approval. Additionally, Section 3.4.2 of
the FEIR described that the product water created at the seawater desalination plant would be
transmitted to local and/or regional storage and distribution systems. The delivery area for the product
water was expected to include a number of local water agencies, municipalities, and the San Diego
County Water Authority (Water Authority; SDCWA) and its member agencies. Although multiple
alternative pipeline alignments were analyzed in the FEIR, the analysis did not include potential impacts
associated with modifying the Water Authority’s facilities that would convey product water to the Water
Authority distribution facilities (Carlsbad 2006). As such, the Water Authority prepared and approved a
Second Addendum for the Carlsbad Desalination Project on November 29, 2012 (SDCWA 2012). The
Second Addendum documented minor changes to the footprint associated with the Twin Oaks Valley
Water Treatment Plant modifications, Pipeline 3 relining, City of San Marcos aqueduct connection point
modifications, Pipeline 4 modifications, and the Macario Canyon pipeline alignment modification and
pumping well. The Second Addendum analyzed changes to the flow control vault layout at the City of
San Marcos connection point site located at the northwest corner of Cherokee Street and Pawnee
Street. These flow control vaults included a “split-level” vault and a chemical injection facility to treat
water routed to the south rather than north. The “split-level” vault at the City of San Marcos connection
point site included an above ground structure with an area of approximately 825 square feet and a
height of approximately 15 feet. The chemical injection facility was not considered a part of normal
operations, would only be required in rare circumstances, and was described as two 5,000-gallon tanker
trucks temporarily parked within secondary containment structures at the City of San Marcos
connection point site.
The Third Addendum was approved by the Water Authority on September 26, 2013 for minor changes
to the Macario Canyon pipeline alignment. The goal of the changes analyzed in the Third Addendum was
to enhance pipeline operational efficiency and reliability as well as reduce the impacts to sensitive
habitat within Macario Canyon. The Third Addendum evaluated underground trenchless pipe installation
crossing Macario Canyon. The Third Addendum also addressed inclusion of ancillary facilities rising 2 to
4 feet above ground on Faraday Avenue in the City of Carlsbad.
Precise Development Plan and 2 January 2018
Desalination Plant Project - Fifth Addendum
The Fourth Addendum was approved by the Water Authority on July 9, 2014 for minor changes to the
previously approved off-site facilities at the City of San Marcos connection point site. Specifically, these
included the construction of two above ground buildings at the City of San Marcos connection point site
to house the previously approved “split level” flow control vaults and the relocation of previously
approved underground interconnect vaults for Water Authority Pipelines 3 and 4. This was performed to
allow for greater operational flexibility and efficiency in receiving and delivering the product water from
the Carlsbad Desalination Project and to facilitate maintenance of the flow control vault components.
On April 12, 2016, the Carlsbad Municipal Water District (CMWD) adopted Resolution No. 1547, which
authorized the execution of a Uniform Contract between the Water Authority and CMWD to purchase
treated water from the Carlsbad Desalination Plant and promote local supply reliability. To enhance
deliveries to the CMWD from the Carlsbad Desalination Project, the City of Carlsbad is proposing minor
modifications to the Approved Project as previously analyzed in the FEIR, First, Second, Third, and
Fourth Addenda. CMWD is planning to construct the Desalination Flow Control Facility 5 (FCF) to directly
accept desalinated water from the Carlsbad Desalination Project to enhance supply reliability and
diversify the water portfolio. The proposed modifications also include a below grade pressure reducing
valve and vault (PRVV) and associated pipelines.
The City of Carlsbad has determined that minor changes to the previously approved facilities are
necessary. Pursuant to Section 15381 of the California Environmental Quality Act (CEQA), the City of
Carlsbad is the lead agency for the preparation of this Fifth Addendum to the FEIR. The purpose of this
Fifth Addendum is to evaluate the potential environmental effects of the proposed modifications
(including the FCF, PRVV and associated pipelines), and to determine if these modifications would result
in any new significant impacts or any substantial increase in the severity of impacts addressed under the
certified FEIR, as amended by the First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum. A description and purpose for each of these modifications is further discussed in Section 4.0.
2.0 PURPOSE OF THE ADDENDUM
As outlined in CEQA Guidelines Section 15164(a), an addendum to a previously certified EIR may be
prepared if only minor technical changes or additions are necessary or none of the conditions described
in Section 15162 calling for the preparation of a subsequent EIR have occurred. The CMWD has
determined that an Addendum to the certified FEIR is the appropriate level of environmental review
under CEQA for the proposed modifications.
Under CEQA, an Addendum to a previously certified EIR may be prepared by either a lead or responsible
agency if the conditions described above are satisfied. As a result, once an EIR has been certified, a
subsequent or supplemental EIR may only be prepared if one of the following conditions has been met
(State CEQA Guidelines Section 15162(a)):
(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 involvement of
new significant environmental effects or a substantial increase in the severity of previously
identified significant effects; or
Precise Development Plan and 3 January 2018
Desalination Plant Project - Fifth Addendum
(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 of the previous EIR was adopted,
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 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.
This Addendum has been prepared by the City of Carlsbad because the construction and operation of
the proposed modifications are consistent with the overall project evaluated in the Approved Project
FEIR and does not require major revisions to the Approved Project FEIR due to new significant impacts
or substantial increases in the severity of previously identified significant impacts. The anticipated
environmental impacts of the proposed modifications, as explained in detail in the following analysis,
have been analyzed and mitigated accordingly in the Approved Project FEIR, and there have been no
new circumstances since that time that would result in new or more severe significant environmental
impacts. As evaluated in the supporting analysis of this Addendum, applicable mitigation measures that
were previously identified in the Approved Project FEIR would continue to ensure that impacts are
reduced to less than significant levels.
Per CEQA Guidelines Section 15164(c), an Addendum need not be circulated for public review, but can
be included in or attached to the approved EIR. Prior to its consideration of the proposed modifications,
the City of Carlsbad will review and consider this Addendum together with the Approved Project FEIR
when making a decision regarding the proposed modifications.
3.0 PROJECT LOCATION
The proposed modifications are located in the central-eastern portion of the City of Carlsbad, northeast
of McClellan-Palomar Airport (see Figure 1, Regional Location and Figure 2, Project Vicinity). The FCF and
PRVV sites would be located on an undeveloped area between Orion Road and the CMWD storage yard
within the CMWD facility at 5950 El Camino Real. The associated pipelines would traverse approximately
2,140 feet within Orion Road between Faraday Avenue and El Camino Real.
The general area is developed with commercial and industrial land uses. Specific surrounding land uses
to the proposed facilities include CMWD offices, parking lot, storage lot, and FedEx shipping center to
the west, open space, and a solid waste transfer station to the east. McClellan-Palomar Airport is
located to the southwest across El Camino Real.
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Desalination Plant Project - Fifth Addendum
4.0 DESCRIPTION OF APPROVED PROJECT
In 2006, the City of Carlsbad approved an amendment to the Precise Development Plan (PDP) granting
Poseidon Resources (Channelside) LLC (Poseidon) land use approvals to construct and operate an
approximately 50 mgd desalination plant and other appurtenant and ancillary water and support
facilities to produce potable water. The Carlsbad Desalination Plant is located on the Encina Power
Station site, adjacent to the existing power plant, located immediately south of the Agua Hedionda
Lagoon, within the City of Carlsbad, in northern San Diego County. As certified in 2006, the FEIR included
an analysis of long-term, off-site, underground flow control vaults and an above ground pump station
located in the City of Oceanside Corporation Yard.
The footprint of the desalination plant and off-site water conveyance facilities were subsequently
modified and addressed in the First Addendum to the FEIR that was approved by the City of Carlsbad in
2009. Long term, offsite, underground flow control vaults were discussed, and identified in general
locations near the proposed project, in the First Addendum.
Minor changes to the footprint associated with the Twin Oaks Valley Water Treatment Plant
modifications, Pipeline 3 relining, San Marcos connection point modifications, Pipeline 4 modifications,
and the Macario Canyon pipeline alignment modification and pumping well were analyzed in the Second
Addendum that was approved by the Water Authority in 2012. The Second Addendum analyzed changes
to the flow control vault layout at the San Marcos connection point site, including a “split-level” vault
(including an above ground structure with an area of approximately 825 square feet and a height of
approximately 15 feet) and a chemical injection facility to treat water routed to the south rather
than north.
In a Third Addendum, which was approved by the Water Authority in 2013, minor changes to the
Macario Canyon pipeline alignment were analyzed including underground trenchless pipe installation.
The Third Addendum also addressed inclusion of ancillary facilities rising two to four feet above ground
on Faraday Avenue in the City of Carlsbad.
The Fourth Addendum was approved by the Water Authority in 2014. New changes were approved for
previously approved off-site facilities at the San Marcos connection point involving the construction of
two above ground buildings to house the previously approved “split level” flow control vaults and the
relocation of previously approved underground interconnect vaults.
5.0 DESCRIPTION OF THE PROPOSED MODIFICATIONS TO THE APPROVED PROJECT
The CMWD Board adopted Resolution No. 1547 which authorized the execution of a Uniform Contract
between the Water Authority and CMWD to purchase treated water from the Carlsbad Desalination
Plant to promote local supply reliability. The agreement allows the transfer of 2,500 acre-feet per year
from the Water Authority’s Carlsbad Desalination Conveyance Pipeline. To accommodate the increase in
treated water, CMWD is planning to construct the Desalination FCF 5, PRVV, and associated pipelines to
directly accept desalinated water from the Carlsbad Desalination Plant, as shown in Figure 3, Proposed
Modifications. The FCF would be located within an enclosure on the CMWD-owned lot west of Orion
Road.
The FCF and PRVV would be located directly north of the CMWD driveway, adjacent to Orion Road. The
FCF enclosure would be a one story roofed structure constructed with light-brown split-faced concrete
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Desalination Plant Project - Fifth Addendum
masonry unit (CMU) blocks. The FCF would have an area of approximately 18 feet by 38 feet. The PRVV
would be below grade and approximately 10 feet by 15 feet. The FCF structure would have an entry
doorway and overhead roll-up door for machinery access and would be surrounded by a paved interior
yard. An approximately 2- to 8-foot CMU retaining wall would be located west of the FCF. Vehicular
access to the structure would be provided via two gated driveways along Orion Road leading to the
interior yard. The FCF and interior yard would be enclosed by a 6-foot wrought iron fence. Refer to
Figure 4, Site Plan.
A pipeline segment would lead north out of the FCF and turn east towards Orion Road, traveling within
the Orion Road right-of-way (ROW), ultimately connecting with the desalination pipeline within Faraday
Avenue. This segment would measure 1,615 feet in length and require 14-inch cement mortar lined and
coated steel pipe. A second pipeline would connect the FCF and PRVV, and then travel south from the
PRVV, across the CMWD lot driveway, ultimately connecting to the CMWD distribution system within
the El Camino Real ROW. The approximately 525-foot pipeline segment would travel within the Orion
Road ROW via an approximately 16-inch PVC pipeline. The pipeline within Orion Road, between Faraday
Drive and El Camino Real, was included and analyzed in the Desalination Project EIR as an alternate
potential pipeline route. Furthermore, the Second Addendum to the EIR included, and analyzed, various
nearby locations for the FCF.
6.0 CITY PERMITS REQUIRED
To process the proposed modifications, the following permits are required:
1. Site Development Permit (SDP 2017-0010)
2. Special Use Permit (SUP 2017-0007)
3. Conditional Use Permit (CUP 2017-0012)
To support these permits, this Fifth Addendum to Project’s certified Environmental Impact Report has
been prepared (EIR 03-05(B)).
7.0 IDENTIFICATION OF ENVIRONMENTAL EFFECTS
Documents containing the environmental analysis supporting the City of Carlsbad’s action in approving
the Approved Project include the FEIR, First Addendum, Second Addendum, Third Addendum, Fourth
Addendum, Mitigation Monitoring and Reporting Program, CEQA Findings, and additional responses
provided for comments submitted after publication of the FEIR.
This Fifth Addendum analyzes the 11 environmental issue areas that were included in the FEIR and First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum, in addition to Greenhouse Gas
Emissions and Tribal Cultural Resources, and discusses whether the proposed modifications described in
Section 5 would trigger significance criteria identified in the CEQA Guidelines, Section 15162 and 15163,
in each of these areas.
• Aesthetics
• Air Quality/Greenhouse Gas Emissions
• Biological Resources
• Cultural Resources/Tribal Cultural Resources
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Desalination Plant Project - Fifth Addendum
• Geology/Soils
• Hazards and Hazardous Materials
• Hydrology/Water Quality
• Land Use/Planning
• Noise and Vibration
• Transportation and Traffic
• Public Services and Utilities
For each environmental issue area, this Fifth Addendum provides a comparative analysis of the impacts
presented in the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum.
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.
8.0 ENVIRONMENTAL ANALYSIS
The following environmental analysis supports the City of Carlsbad’s determination that approval and
implementation of the proposed modifications would not result in new significant environmental
impacts or a substantial increase in the severity of previously disclosed impacts covered under the
Approved Project EIR, First Addendum, Second Addendum, Third Addendum, Fourth Addendum,
Mitigation Monitoring and Reporting Program, CEQA Findings, and additional responses provided for
comments submitted after publication of the FEIR. This environmental analysis is subject to all
applicable mitigation measures outlined in the Approved Project EIR, First Addendum, Second
Addendum, Third Addendum, Fourth Addendum, and Mitigation Monitoring and Reporting Program.
Where such requirements apply and are relevant, they are noted in the discussion below.
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 CEQA Findings, pages 11 and 12.
These sections identify the components of the proposed modifications that may produce visual impacts
or affect visual character upon implementation.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
because aesthetic impacts from construction activities would be short-term and within limited areas,
construction-related impacts to visual resources would be considered less than significant.
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Desalination Plant Project - Fifth Addendum
Long-term, off-site pipelines were determined to not have long-term aesthetic impacts as they were to
be placed underground and would not be exposed to public view. An off-site flow control building was
analyzed for aesthetic impacts in the Fourth Addendum. As the building was designed with a similar
scale and architecture of the surrounding industrial area, impacts were determined to be less than
significant.
Analysis of the Proposed Modifications
Similar to previously analyzed components, aesthetic impacts from construction activities would be
short-term and within limited areas; therefore, construction-related impacts to visual resources would
be considered less than significant
As with previously analyzed pipelines, pipelines for the proposed modifications would not have
long-term aesthetic impacts as they were to be placed underground and would not be exposed to
public view.
The FCF site is located within an existing CMWD facility. The area where the FCF is proposed is currently
undeveloped and contains ornamental landscaping. The surrounding area is characterized by large
industrial buildings, such as a FedEx shipping center and waste management facility, and general
commercial buildings. No sensitive visual receptors or scenic vistas are identified in the area. An open
space area exists across Orion Road to the east.
The design of the proposed FCF is consistent with the development in the vicinity of the site. In addition,
the surrounding structures in the area have much greater bulk and scale than the proposed
modifications, as the floor area of the one-story FCF structure would be approximately 20 feet by
35 feet, and the area of the below grade PRVV would be approximately 10 feet by 15 feet. Construction
of the FCF and PRVV would require the removal of ornamental landscaping, including two trees, within
the CMWD facility. The FCF would not interfere with public views of the open space area to the east.
Therefore, the proposed modifications would not interfere with a scenic vista and would have a less
than significant impact on scenic resources and visual character and quality.
The lighting for the FCF would be for security and would be directed downward to reduce glare and
avoid adverse effects on surrounding areas. The proposed modifications would adhere to mitigation
measure 4.1-5 from the FEIR, thereby ensuring that exterior lighting would be minimized for safety and
operation purposes. Therefore, lighting impacts from the proposed modifications would be less than
significant.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
No substantial changes in the aesthetic or visual environment have occurred since certification of the
FEIR, approval of the First Addendum, Second Addendum, Third Addendum, and Fourth Addendum, 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
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Desalination Plant Project - Fifth Addendum
measures previously adopted for the Approved Project will apply to the proposed modifications
described herein, as applicable. Additionally, there are no substantial changes to the circumstances
under which the Approved Project will be undertaken, and no new information of substantial
importance regarding aesthetics and visual character which was not known and could not have been
known when the FEIR was certified, and the First Addendum, Second Addendum, Third Addendum, and
Fourth Addendum were approved has since been identified. Therefore, the impacts to aesthetic
resources associated with the proposed modifications do not meet the standards for a subsequent or
supplemental EIR as provided pursuant to CEQA Guidelines, Section 15162 and 15163.
Air Quality / Greenhouse Gas Emissions
Previous Analysis
Analysis of air quality impacts determined that no significant impacts to air quality would occur;
therefore, no mitigation measures are required. The potential impacts were analyzed in the Approved
Project and are contained in the FEIR, Section 4.2, pages 4.2-10 through 4.2-21. See also CEQA Findings,
page 12.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
impacts to air quality as a result of construction and operation of the Approved Project, including from
criteria pollutant emissions, would be less than significant.
Emission calculations were based on two crews placing base material, four crews laying the pipeline in
the trench, and three crews backfilling the trench at any given time. Each of these documents concluded
that air quality impacts associated with implementation of the Approved Project would not result in any
significant impacts. The FEIR had originally assumed that seven segments of 1,000 feet of pipeline would
be constructed simultaneously. However, the Second Addendum acknowledged that under the updated
construction schedule there would be no more than two segments of 1,000 feet of pipeline constructed
simultaneously. As a result, the disclosed construction emissions calculated in the FEIR associated with
the off-site pipelines are substantially overestimated.
Analysis of the Proposed Modifications
Construction of the proposed modifications, including the FCF, PRVV, and pipelines, would result in
temporary increases in criteria pollutant emissions associated with soil disturbance, dust emissions, and
combustion pollutants from on-site construction equipment, as well as from personal vehicles,
vendor/delivery trucks, and off-site trucks hauling soil and aggregate material. However, as described
above, the construction emissions calculated in the FEIR are substantially overestimated, and the
contribution from the proposed modifications would not increase the analyzed maximum daily
construction emissions that would result in exceedance of the San Diego Air Pollution Control District
(SDAPCD) significance thresholds.
The proposed modifications do not include any change to the operational characteristics of the
desalination plant and would therefore not increase operational criteria pollutant emissions from what
was previously analyzed in the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum. Therefore, similar to the findings of the FEIR, First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum, criteria air pollution emissions from the proposed modifications
would be temporary and would not be expected to have a permanent significant impact on ambient air
quality.
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Desalination Plant Project - Fifth Addendum
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
As discussed in the First Addendum to the FEIR, Assembly Bill 32 (AB 32) requires the California Air
Resources Board (CARB), the state agency charged with regulating statewide air quality, to adopt rules
and regulations that would achieve greenhouse gas (GHG) emissions equivalent to statewide levels in
1990 by 2020. GHG emissions were addressed in the First Addendum and through the California Coastal
Commission’s (CCC’s) conditional approval of the Project’s Energy Minimization and Greenhouse Gas
Reduction Plan (GHG Reduction Plan), dated May 23, 2008. The GHG Reduction Plan provides for the
assessment, reduction, and mitigation of GHG emissions, and establishes a protocol for identifying,
securing, monitoring, and updating measures to eliminate the Project’s net carbon footprint. The
operational protocol for the GHG Reduction Plan and the consistency with the California Coastal
Commission’s “Greenhouse Gas Emissions Template” are described in further detail in the First
Addendum.
In September 2015, Carlsbad adopted a Climate Action Plan (CAP) that outlines actions that the City will
undertake to achieve its proportional share of state GHG emissions reductions. The purpose of the CAP
Consistency Checklist is to, in conjunction with the CAP, provide a streamlined review process for
proposed new development projects that are subject to discretionary review pursuant to CEQA. The
FEIR for the Approved Project was certified prior to the implementation of requirements to analyze GHG
emissions under CEQA and prior to adoption of the CAP. Nevertheless, the proposed modifications
would be consistent with the city’s CAP Consistency Checklist, as it would be consistent with the City of
Carlsbad General Plan and would emit fewer than 900 metric tons of carbon dioxide equivalents. and
additional review would not be required.
All energy use required to deliver product water would be incurred by pumps at the Carlsbad
Desalination Plant, and this energy use was previously analyzed in the FEIR for the Carlsbad Desalination
Plant Project. The proposed modifications do not propose any change to the operational characteristics
of the desalination plant and would not lead to a substantial increase of operational GHG emissions
from what was previously analyzed in the FEIR, First Addendum, Second Addendum, Third Addendum,
and Fourth Addendum. GHG emissions from construction activities associated with the proposed
modifications would not exceed those identified in the FEIR. Furthermore, Poseidon developed the GHG
Reduction Plan, described above which includes the purchase of 25,000 tons of carbon offsets for
construction-related emissions from the construction of the desalination plant. The offsets required by
the CCC would exceed the offsets needed for construction-related impacts, even with the addition of
the modifications from the First Addendum, Second Addendum, Third Addendum, Fourth Addendum,
and the proposed modifications.
The proposed modifications would not result in an increase in overall construction or operational GHG
emissions from what was previously analyzed. The CCC accepted the Approved Project’s GHG Plan in
August 2008. With implementation of the GHG Reduction Plan, the Approved Project will demonstrate
net carbon neutrality over the 30-year life of the Approved Project from indirect sources (electrical
energy consumption).
Conclusion
The proposed modifications are consistent with the GHG Reduction Plan requirement demonstrating a
“net zero” impact on GHG emissions from indirect sources (electrical energy consumption). The
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Desalination Plant Project - Fifth Addendum
proposed modifications would not increase the severity of previously identified air quality impacts, nor
would it result in any new significant effects related to air emissions that were not previously identified
in the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum. 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 Approved Project would be
undertaken, and no new information of substantial importance which was not known and could not
have been known when the FEIR was certified and the First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum were approved, has since been identified. Therefore, the impacts to
air quality and GHG emissions associated with the proposed modifications do not meet the standards
for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162
and 15163.
Biological Resources
Previous Analysis
Analysis of biological resource 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.
Implementation of the Approved Project was determined to result in the direct loss of the vegetation
community acreages intersecting the proposed 40-foot construction corridor associated with open
trench construction techniques, which would include off-site pipelines. These impacts were determined
to be temporary and potentially significant. The biological resources analysis in the FEIR included the
“Palomar Airport” pipeline route, which included a pipeline traveling near the proposed modifications
(within El Camino Real, between Orion Road to Palomar Airport Road), and figures within both the FEIR
and the First Addendum depict an additional alignment on Orion Drive from Faraday Avenue to El
Camino Real. Vegetation types near that pipeline alignment were labeled as “Developed” in the area.
Any impacts to affected vegetation communities would require implementation of mitigation measures
4.3-1 and 4.3-2, which would provide mitigation for affected vegetation types based on the ratios listed
in Table 4.3-9 of the FEIR. In addition, as part of mitigation measure 4.3-1, restoration of uplands was
included in an Uplands Mitigation and Monitoring Plan. Although the proposed modifications would
require construction in the vicinity of open space, all construction would take place within the Orion
Road ROW or CMWD property, outside of sensitive habitat areas. Ornamental shrubbery and trees
within CMWD property would be removed to accommodate the FCF. Landscaping is proposed around
the proposed FCF and would blend in with the existing vegetation. According to the FEIR analysis, during
construction of the Approved Project, edge effects may include dust from soil disruption which could
affect plant vitality, or construction related soil erosion and runoff. Therefore, impacts associated with
dust were determined to be potentially significant; these impacts would be mitigated to less than
significant through implementation of mitigation measure 4.3-3. Long-term indirect impacts on
vegetation communities were determined to not increase as a result of the Approved Project, because
the impacts were temporary and the resources were to be revegetated to their pre-construction
conditions. In addition, the FEIR determined that California least terns and other birds that utilize the
area for foraging would not be expected to be impacted by implementation of the Approved Project.
Because of the temporary nature of the Approved Project’s impacts and absence of above ground
features that could preclude linkages or movements, the previous analyses determined that no indirect
impacts would occur to habitat linkages or wildlife movement corridors.
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Analysis of the Proposed Modifications
The proposed modifications would be located within existing ROW and on a previously developed
parcel. Construction of the FCF, PRVV, and associated pipelines would not traverse any sensitive habitats
or open space. Open space is located east of Orion Road; however, pipeline construction would be
located within the roadway ROW. Potential impacts to biological resources could be associated with the
temporary and permanent removal of vegetation, and indirect adverse effects from construction related
noise and fugitive dust.
The FCF structure would be constructed on a graded development pad. The site is characterized by
primarily ornamental vegetation. Two ornamental trees would be removed to facilitate construction.
Safety and security lighting at the FCF would be directed downward so that it does not illuminate
adjacent areas. Staff inspections of these facilities would be intermittent, and due to the existing high
activity around the existing CMWD facility, long term biological impacts are typically considered to be
limited with no substantial secondary effects.
A site visit was conducted by a biologist from HELIX Environmental Planning on November 9, 2017. This
observation indicated the presence of southern willow scrub riparian habitat at the northern edge of the
CMWD storage facility, and southwest of Orion Road. However, the proposed pipeline would be located
over 50 feet from the edge of this habitat, and no impacts are anticipated. Due to lack of sensitive
habitat within the area of proposed modifications, no direct biological impacts would occur. Indirect
impacts from construction and operation of the proposed modifications may include noise, fugitive dust,
erosion, and sedimentation. However, the proposed modifications would be located within a previously
developed parcel and existing ROW and would not impact sensitive species or habitats.
The FEIR addressed a broad scope of impacts on sensitive biological resources to provide for flexibility in
final design and alignment of the conveyance pipelines. As a result, mitigation measures outlined within
the FEIR would be applicable to the proposed modifications. With mitigation, impacts to biological
resources would be similar to those discussed in the FEIR and would remain less than significant.
There have been no substantial changes in biological resource conditions within the area of the
proposed modifications since the time of certification of the FEIR, and approval of the First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum. Additionally, no new information of
substantial importance regarding biological resources has become available. Therefore, no changes in
circumstances and no new information of substantial importance relative to biological resources have
been identified.
Conclusion
None of the proposed modifications 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 Approved 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 FEIR was certified, and the First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum were approved has since been identified. Therefore, the biological
resources impacts associated with the proposed modifications do not meet the standards for a
subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162 and 15163.
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Cultural Resources / Tribal Cultural Resources
Previous Analysis
Analysis of cultural resource 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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum
concluded that cultural resources impacts would be potentially significant from the potential to
encounter cultural resources during construction. These impacts would be mitigated to less than
significant with implementation of the mitigation measures described in Section 4.4.4 of the FEIR.
In addition, for the offsite elements, the previous analyses identified that grading and earthwork
impacts to Cretaceous and Tertiary Age deposits could disturb potentially occurring fossils and the
information in the fossils could be lost. Therefore, paleontological resources were identified as
potentially significant, and mitigation in the form of construction monitoring, as described in
Section 4.4.4 of the FEIR, would be implemented to reduce impacts to less than significant.
Analysis of the Proposed Modifications
Similar to the Approved Project, cultural and paleontological resources could be affected by ground
disturbing activities that could damage or destroy surface or subsurface resources. The proposed
modifications would include excavation and grading activities necessary to install the FCF, PRVV, and
associated pipelines.
A Cultural Resources Study was prepared by HELIX Environmental Planning in 2017 (Attachment A) to
analyze the cultural resource sensitivity of the proposed modifications. The records search for the
inventory found one previously recorded site in the area for the proposed modifications (SD-5118).
Although the proposed modifications would occur entirely within existing ROW or in areas that have
been previously graded or disturbed; the FCF and PRVV locations would be located in an area that may
intersect the location of this known cultural resource, which is mapped within and immediately west of
Orion Street (HELIX 2017). The site is described as a large rock outcrop used as a milling site. An initial
site visit on November 7, 2017 by a HELIX archaeologist to the mapped location of the resource did not
reveal evidence of milling, though the cultural resources may be discovered upon construction of the
proposed modifications. A second visit including a Native American monitor was conducted on
January 3, 2018 to specifically search for evidence of SD-5118 within the proposed FCF site. This visit did
not discover the milling site, cultural artifacts, or evidence of cultural resources.
Tribal outreach was conducted for the proposed modifications as part of the Cultural Resources Study.
Five responses from local tribes were received, with one deferring to other tribes, and four stating that
the site is within a traditional use area or may have cultural significance.
Although no evidence of cultural resources was discovered during two visits to the areas where the
proposed modifications would be constructed, impacts to cultural resources may still result from
construction activity, and adherence to the cultural resources mitigation identified in the FEIR would be
required. Mitigation measures 4.4-1 and 4.4-2 would be implemented to ensure identified impacts to
cultural resources would be less than significant. Therefore, the proposed modifications would not
result in new significant impacts or increase the severity of impacts identified in the FEIR and, therefore,
would not change the FEIR conclusion.
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Similar to the Approved Project, the proposed modifications would implement the required protocols
under Public Resources Code (PRC) Section 5097.97 and California State Health and Safety Code
Section 7050.5 if human remains are encountered; therefore, impacts to human remains would be less
than significant.
Substantial Changes with Respect to the Circumstances Under Which the Project is Undertaken/New
Information of Substantial Importance
There have been no substantial changes in cultural or paleontological resource conditions within the
area of the proposed modifications since the time of certification of the FEIR, and approval of the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. Additionally, no new
information of substantial importance regarding cultural or paleontological resources has become
available. Therefore, no changes in circumstances and no new information of substantial importance
relative to cultural or paleontological 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 Approved Project would be undertaken, and no new information
of substantial importance regarding cultural resources which was not known and could not have been
known when the FEIR was certified and the First Addendum, Second Addendum, Third Addendum, and
Fourth Addendum were approved has since been identified. Therefore, the impacts to cultural and tribal
cultural resources associated with the proposed modifications do not meet the standards for a
subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162 and 15163.
Geology and Soils
Previous Analysis
Analysis of geology and 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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum found that
potentially significant construction-related impacts may occur from encountering unstable soil and rock
conditions and exposure of oversize rock material during grading. This would be mitigated to less than
significant with the identified mitigation measures incorporated.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum also found that
during construction activities, erosion could be accelerated, which could undermine slopes, cause
siltation of surface waters, and expose and damage underground facilities. This impact was found to be
less than significant with implementation of identified mitigation measures, including mitigation
measures 4.7-1 and 4.7-2, which require preparation a Stormwater Pollution Prevention Plan (SWPPP)
and a Stormwater Management Plan (SWMP). Additionally, the FEIR, First Addendum, Second
Addendum, Third Addendum, and Fourth Addendum found that impacts to mineral resources would be
less than significant.
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Analysis of the Proposed Modifications
The proposed modifications would result in similar potentially significant impact due to encountering
unstable soil and rock conditions and exposure of oversize rock material during grading. These geologic
impacts of the proposed modifications would be mitigated to a less-than-significant level with the
implementation of mitigation measure 4.5-2, which requires that a preconstruction geotechnical
investigation be prepared to address geotechnical considerations. All recommendations of the
geotechnical investigation would be implemented.
The erosion potential for the proposed modifications would be potentially significant, similar to the
Approved Project. Impacts would be mitigated to less than significant with the implementation of
mitigation measures 4.7-1 and 4.7-2, which requires preparation of an SWPPP and a SWMP,
respectively.
The area for the proposed modifications is 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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
There have been no substantial changes to geology, soils, or mineral resource conditions within the area
of the proposed modifications since the time of certification of the FEIR, and approval of the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. Additionally, no new
information of substantial importance regarding known geology, soils, or mineral resource conditions
has become available. Therefore, no changes in circumstances and no new information of substantial
importance relative to geology and soil resources 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 geology, soils, or mineral resources within the FEIR,
First Addendum, Second Addendum, Third Addendum, or Fourth Addendum. Additionally, there are no
substantial changes to the circumstances under which the Approved Project would be undertaken, and
no new information of substantial importance regarding geology and soils which was not known and
could not have been known when the FEIR was certified, and the First Addendum, Second Addendum,
Third Addendum, and Fourth Addendum were approved has since been identified. Therefore, potential
geology and soils impacts associated with the proposed modifications do not meet the standards for a
subsequent or supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162 and 15163.
Hazards and Hazardous Materials
Previous Analysis
Analysis of hazards and hazardous materials 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.
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The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum identified
40 sites in proximity to construction areas for the off-site pipelines. These include a site on the north
side of Faraday Avenue and two sites associated with the Palomar Landfill at the airport (Site Nos. 2, 3,
and 4 from Table 4.6-1 of the FEIR). The analyses determined that the Approved Project’s off-site
construction would require grading and trenching that could potentially disturb and release hazardous
materials into the environment from subsurface contamination discovered during construction. The
FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum included mitigation
measures 4.6-1, 4.6-3, and 4.6-7, as described in Section 4.6.4 of the FEIR, to mitigate this potential for
exposure to unanticipated contamination during construction.
The previous analyses determined that operation of the off-site pipeline areas would convey potable
water through the pipelines, and therefore would not pose a hazardous risk to the public or the
environment. These impacts were determined to be less than significant.
Some of the Approved Project pipelines were to be located within the Palomar-McClellan Airport
Influence Area. The previous analyses determined that construction activities for the segments of the
alternative pipeline alignments located at and near Palomar-McClellan Airport would need to be
coordinated with airport operations to avoid presenting a potential hazard to airport and aircraft
operations. This would be accomplished through mitigation measure 4.8-1 in Section 4.8, Land Use/
Planning, which would ensure the necessary coordination will occur.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum determined that
in order to reduce the potentially significant impacts from construction traffic conflicts with the Carlsbad
Emergency Plan, a traffic control plan would be developed as part of the project, as described in
mitigation measure 4.10-2 of Section 4.10, Transportation and Traffic. With incorporation of the traffic
control plan, the Approved Project was determined to not significantly impair implementation of or
physically interfere with an adopted emergency response plan or emergency evacuation plan.
Analysis of the Proposed Modifications
The proposed modifications would be located near three hazardous waste sites identified in Table 4.6-1
of the FEIR, including a site on the north side of Faraday Avenue and two sites associated with the
Palomar Landfill at the airport (Site No. 2, 3, and 4). The alignments of the modifications would not
intersect with these sites. However, grading and trenching for the proposed modifications could
potentially disturb and release hazardous materials into the environment from subsurface
contamination. Therefore, the proposed modifications would implement mitigation measure 4.6-1,
described in Section 4.6.4 of the FEIR, to mitigate the potential for contamination to less than
significant.
Operation of the pipelines would involve transportation of potable water and would not pose a
hazardous risk to the public or the environments. Furthermore, operation of the FCF and PRVV is not
expected to require the use of hazardous materials.
The proposed modifications would be located within the Palomar-McClellan Airport Influence Area
(McClellan-Palomar Airport Land Use Compatibility Plan (ALUCP), as Amended December 1, 2011).
Construction activities for the proposed modifications would need to be coordinated with airport
operations to avoid presenting a potential hazard to airport and aircraft operations. This would be
accomplished through implementation of mitigation measure 4.8-1 in Section 4.8, Land Use/Planning,
which would ensure the necessary coordination will occur.
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Construction of the proposed modifications could result in potentially significant impacts from
construction traffic conflicts that would impair implementation of or physically interfere with an
adopted emergency response plan or emergency evacuation plan, such as the Carlsbad Emergency Plan.
A traffic control plan would be developed as part of mitigation measure 4.10-2, as described in
Section 4.10.4 of the FEIR. With incorporation of the traffic control plan, the project would not
significantly impair implementation of or physically interfere with an adopted emergency response plan
or emergency evacuation plan.
Mitigation measures 4.6-2 through 4.6-7 of the FEIR would not be applicable to operation of the
proposed modifications, as those measures are related to operation of the desalination plant.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
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 FEIR, and approval of the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. 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 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 Approved 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 FEIR was certified, and the First Addendum, Second
Addendum, Third Addendum, and Fourth Addendum were approved has since been identified.
Therefore, the hazards and hazardous materials impacts associated with the proposed modifications do
not meet the standards for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines,
Sections 15162 and 15163.
Hydrology/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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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. With implementation of mitigation measures 4.7-1 and 4.7-2,
which includes preparation of a SWPPP and a SWMP, the short-term surface water quality impacts were
determined to be less than significant.
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The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
long-term impacts to hydrology and water quality due to operation of the off-site pipelines and
associated (below-ground) infrastructure would be less than significant, as the pipelines would not
result in an increase in impervious surfaces or long-term pollutant discharges.
Above-ground facilities were determined to increase impervious surfaces, which could cause a
potentially significant impact to hydrology from increased runoff. This would be mitigated through
implementation of a SWMP under mitigation measure 4.7-2.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
some off-site pipelines would be located within 100-year flood zones. During construction, placement of
construction materials was determined to have the potential to temporary impede or redirect flows,
which would result in a potentially significant impact. These impacts would be reduced to less than
significant through implementation of mitigation measure 4.7-3, which for projects within flood zones
would restrict construction to the dry season (May 1 to September 30).
Analysis of the Proposed Modifications
Construction of the proposed modifications 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. With implementation of mitigation measures 4.7-1 and
4.7-2, which includes preparation of a SWPPP and a SWMP, the short-term surface water quality
impacts were determined to be less than significant.
Operation of the pipelines would result in less than significant impacts to hydrology and water quality,
as the pipelines and PRVV would not result in an increase in impervious surfaces or long-term pollutant
discharges as they would be installed below ground.
The FCF would increase impervious surfaces as it would be developed in an earthen area of the CMWD
property that is currently unused, which increase erosion and runoff. Potential increases of hydrology
impacts would be mitigated through implementation of a SWMP under mitigation measure 4.7-2.
The proposed modifications would not be located within a 100-year flood zone (FEMA 2012). Therefore,
the project would not impede or redirect flood flows.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
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 FEIR, and approval of the First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum. 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 involve new significant impacts or a substantial increase in
previously identified impacts related to hydrology and water quality. Additionally, there are no
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substantial changes to the circumstances under which the Approved 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 FEIR was certified, and the First Addendum, Second
Addendum, Third Addendum, and Fourth Addendum were approved has since been identified.
Therefore, the hydrology and water quality impacts associated with the proposed modifications do not
meet the standards for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines,
Sections 15162 and 15163.
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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
construction activities within the Airport Influence Area of the McClellan-Palomar Airport, particularly
the Runway Protection Zone, could result in temporary, potentially significant land use conflicts with the
ALUCP. These activities would include off-site pipelines. These impacts would be mitigated through
mitigation measure 4.8-1, which would ensure coordination and approval with the McClellan-Palomar
Airport Operations Manager before constructing with the Airport Influence Area.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum determined that
short-term construction related effects and operation would not conflict with other zoning or land use
policies, and impacts would be less than significant.
Analysis of the Proposed Modifications
The proposed modifications would be within the Airport Influence Area of the McClellan-Palomar
Airport, and could result in temporary, potentially significant land use conflicts with the ALUCP. These
impacts would be mitigated through mitigation measure 4.8-1, which would ensure coordination and
approval with the McClellan-Palomar Airport Operations Manager before constructing within the Airport
Influence Area.
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 FEIR, First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. The FCF would be located
within an existing parcel used by the CMWD and in an industrial area and would be consistent with
surrounding land uses. The pipelines would be located within this property and within road ROW. Other
than potential conflicts with the ALUCP, construction and operation of the FCF and pipelines would not
conflict with other zoning or land use policies.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
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 FEIR, and approval of the First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum. Additionally, no new information of
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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.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in
previously identified impacts related to land use/planning. Additionally, there are no substantial changes
to the circumstances under which the Approved 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 FEIR was certified, and the First Addendum, Second Addendum, Third Addendum, and
Fourth Addendum were approved has since been identified. Therefore, the land use/planning impacts
associated with the proposed modifications do not meet the standards for a subsequent or
supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162 and 15163.
Noise and Vibration
Previous Analysis
An analysis of noise impacts determined no significant impacts related to noise issues were identified;
therefore, no mitigation measures are required. Potential impacts were analyzed in the Approved
Project and 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 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 excavation and installation of the pipelines using open trench
installation methods would not result in a significant noise impact. 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. In addition, construction
noise from the use of heavy trucks to deliver materials would generate a noise level of approximately
59 dB Community Noise Level Equivalent (CNEL) at a distance of 50 feet from the road.
Analysis of the Proposed Modifications
Construction of the proposed modifications, including the PRVV, FCF and pipelines, would result in a
temporary increase of noise levels in the vicinity of the construction work. However, the land uses that
surround the location of the proposed modifications are primarily industrial and commercial, which are
not considered noise-sensitive.
Construction of the FCF and PRVV could involve the operation of heavy construction equipment for
grading, construction of the facility structure, and paving. Construction of the pipelines would use heavy
construction equipment for open-cut trenching. Construction noise can vary based on the size of
equipment used, percentage of time, and number of pieces of equipment that would operate on the
site. Based on a conservative construction scenario with multiple construction activities occurring
simultaneously, the predicted maximum construction noise levels would not exceed the approximate
average sound level of 75 dB for an 8-hour work day, as disclosed in the FEIR, First Addendum, Second
Addendum Third Addendum, and Fourth Addendum. In addition, the proposed modifications would not
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be constructed near noise-sensitive land uses. Therefore, impacts from construction noise would be less
than significant.
The FCF (above grade) and PRVV (below grade) would generate operational noise from mechanical
equipment. These pieces of equipment would be located inside an enclosure that would attenuate noise
generated from the equipment, and noise to the surrounding area would be expected to be minor. In
addition, the FCF and PRVV are not located near a noise-sensitive land use. At this distance, noise from
the FCF and PRVV would not be noticeable. Once operational, the proposed pipelines would be passive
and would not result in permanent increases in the ambient noise environment. Therefore, operational
noise impacts from the proposed modifications would be less than significant.
Ground-borne vibration is typically attenuated over short distances. In addition, construction would not
occur near vibration-sensitive land uses, and construction activities known to generate substantial
vibration, such as pile driving and blasting, would not occur for the proposed modifications. Therefore,
impacts from vibration would be less than significant.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
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 FEIR, and approval of the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. 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.
Conclusion
None of the proposed modifications 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 Approved 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 FEIR was certified, and the First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum were approved has since been identified. Therefore, the noise and
vibration impacts from the proposed modifications do not meet the standards for a subsequent or
supplemental EIR as provided pursuant to CEQA Guidelines, Sections 15162 and 15163.
Transportation/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 4.10-14. See also CEQA Findings, pages 21 and 22.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that
the off-site pipeline construction within roadway ROW by the Approved Project could require temporary
lane closures for trenching, construction staging and equipment maneuvering that could result in
potentially significant impacts to traffic congestion and traffic safety. The FEIR, First Addendum, Second
Addendum, Third Addendum, and Fourth Addendum included mitigation measure 4.10-1, which
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requires that transport of soil and materials to and from the proposed site will not result in
unacceptable levels of service during peak hour periods on any affected roadways, and mitigation
measure 4.10-2, which requires that specific traffic control measures as set forth within an approved
traffic control plan are implemented. With implementation of these mitigation measures, traffic impacts
were considered less than significant.
The FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum, the
proposed modifications could result in potentially significant short-term construction traffic impacts to
traffic congestion and traffic safety from the construction of the pipeline within Orion Road, Faraday
Avenue, and El Camino Real. These impacts would be mitigated to less than significant through
implementation of mitigation measure 4.10-1, which requires that transport of soil and materials to and
from the proposed site will not result in unacceptable levels of service during peak hour periods on any
affected roadways, and mitigation measure 4.10-2, which requires that specific traffic control measures
as set forth within an approved traffic control plan are implemented.
After construction, vehicle trips associated with inspection of the facilities would be similar to those
previously analyzed under the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum, and would not be considered new traffic trips. Furthermore, the completion of the FCF,
PRVV, and associated pipelines would not result in an increase in staffing 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 under the FEIR, First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum. Therefore, long-term impacts
to transportation and traffic would be similar to the Approved Project and would be less than significant.
Substantial Changes with Respect to the Circumstances Under Which the Proposed Modifications are
Undertaken/New Information of Substantial Importance
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 FEIR, and approval of the First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum. 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 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 Approved 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 FEIR was certified, and the First Addendum, Second Addendum,
Third Addendum, and Fourth Addendum were approved has since been identified. Therefore, the
transportation and traffic impacts associated with the proposed modifications do not meet the
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standards for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines,
Sections 15162 and 15163.
Public Utilities and Service Systems
Previous Analysis
Analysis of public utilities and service system impacts and EIR-identified mitigation measure 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 utilities and service systems in the FEIR, First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum concluded that the water treatment plant and associated
infrastructure would not result in significant impacts to fire and police services, parks, water, schools,
landfills, stormwater drainage facilities, or electric power services. Potentially significant impacts were
identified to wastewater treatment facilities; however, these impacts were directly related to waste
discharge from the desalination facility.
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 would not result in an increase in the maximum energy use that was
contemplated in the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum. All energy use required to deliver product water to the components of the proposed
modifications would be incurred by pumps at the Carlsbad Desalination Plant, and this energy use was
previously analyzed in the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum. Therefore, the proposed modifications would not result in new significant public utilities
and service systems impacts or increase the severity of impacts identified in the FEIR, First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum, and would not change the conclusion that
no significant impacts to public utilities and services would occur.
Substantial Changes with Respect to the Circumstances Under Which the Project is Undertaken/ New
Information of Substantial Importance
There have been no substantial changes in public utilities and service systems, or to the requirements of
agencies that provide such services within the area of the proposed modifications since the time of
certification of the FEIR, and approval of the First Addendum, Second Addendum, Third Addendum, and
Fourth Addendum. Additionally, no new information of substantial importance regarding public utilities
and service systems has become available. Therefore, no changes in circumstances and no new
information of substantial importance relative to public utilities and service systems have been
identified.
Conclusion
None of the proposed modifications involve new significant impacts or a substantial increase in
previously identified impacts related to public utilities and service systems. Additionally, there are no
substantial changes to the circumstances under which the Approved Project would be undertaken, and
no new information of substantial importance regarding public utilities and service systems which was
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not known and could not have been known when the FEIR was certified, and the First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum were approved has since been identified.
Therefore, the public utilities and service systems impacts from the proposed modifications do not meet
the standards for a subsequent or supplemental EIR as provided pursuant to CEQA Guidelines,
Sections 15162 and 15163.
9.0 CUMULATIVE IMPACTS
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 FEIR, First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 FEIR, First Addendum, Second Addendum,
Third Addendum, and Fourth Addendum remain the same for the proposed modifications.
Substantial Changes with Respect to the Circumstances Under Which the Project is Undertaken/New
Information of Substantial Importance
Since certification of the FEIR and approval of the First Addendum, Second Addendum, Third Addendum,
and Fourth Addendum, additional cumulative development may have been proposed and/or
constructed. The analysis contained in the First Addendum, Second Addendum, Third Addendum, and
Fourth Addendum occurred following the effects of a severe economic downturn, curtailing many
development activities within the Project area. The minor amount of land development projects that
have been proposed and/or developed in the intervening time since the preparation of the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum is not considered to be
substantial. The following provides a cumulative analysis of the proposed modifications.
Aesthetics
The proposed modifications have been designed to have minimal visual impacts as most of the project is
below grade. Furthermore, the proposed FCF will be one story in height and constructed from light-
brown split-faced CMU blocks to be compatible with the natural surroundings. Existing landscaping
surrounding the facility that would remain would further screen the building from view. 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 FEIR was certified and First Addendum,
Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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Air Quality / 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 within the context of the air
basin. 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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth
Addendum construction-related emissions would be short-term in nature. There would be no new
operational air pollutant emissions not already considered in the FEIR, First Addendum, Second
Addendum, Third Addendum, or Fourth Addendum. Furthermore, the proposed modifications are
consistent with the GHG Reduction Plan requirement to have a “net zero” impact on GHG emissions
from indirect sources (electrical energy consumption).
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 FEIR was certified and the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
Biological Resources
The proposed modifications do not involve new significant impacts or a substantial increase in
previously identified impacts due to the location of the pipeline within existing ROW and the highly
disturbed nature of the FCF and PRVV site. 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 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 FEIR was certified and the First
Addendum, Second Addendum Third Addendum, and Fourth Addendum 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 and 15163.
Cultural Resources / Tribal Cultural Resources
The proposed modifications will require relatively minor grading and excavation within existing ROW
and 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 or tribal resources are reduced to less-than-significant levels. As such, the proposed
modifications would not have a cumulatively considerable contribution to a cumulative cultural or tribal
resource impact. Similar mitigation measures would also be required for any additional cumulative
development and, therefore, the level of cumulative impact would not change.
Precise Development Plan and 25 January 2018
Desalination Plant Project - Fifth Addendum
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 FEIR was certified and the First
Addendum, Second Addendum, Third Addendum 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 and 15163.
Geology and Soils
The proposed modifications will require site preparation and excavation of soils for pipeline installation.
The mitigation included in the FEIR 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. Therefore, the proposed modifications would not
have a cumulatively considerable contribution to a cumulative impact related to geology and soils.
Additionally, any additional cumulative development would have similar levels of impact on geology and
soils and would be subject to similar requirements and mitigation measures.
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 FEIR was certified and the
First Addendum, Second Addendum, Third Addendum, and Fourth Addendum were approved, that has
since been identified. Therefore, the effects of additional cumulative development regarding cumulative
geology/soils impacts do not meet the standards for a subsequent or supplemental EIR pursuant to
CEQA Guidelines, Sections 15162 and 15163.
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 FEIR, First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum concluded that the Approved
Project would not contribute to cumulative considerable increases in hazards or hazardous materials.
Any additional cumulative development would have similar regulatory controls.
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 FEIR was certified and the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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.
Precise Development Plan and 26 January 2018
Desalination Plant Project - Fifth Addendum
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 FEIR was certified and
the First Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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. Therefore, the incremental effect of the proposed modifications on any
potential significant cumulative impact 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 FEIR was certified and the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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, and
it is not anticipated that ambient noise levels would increase substantially beyond current levels as a
result of project operations. Further, any additional cumulative development would be subject to the
existing noise regulations 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 noise and
vibration impacts which was not known and could not have been known when the FEIR was certified
and the First Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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
Precise Development Plan and 27 January 2018
Desalination Plant Project - Fifth Addendum
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 FEIR was certified and the First
Addendum, Second Addendum, Third Addendum, and Fourth Addendum 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 and 15163.
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. The additional cumulative development would not change the analysis or
conclusions of the FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum
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 FEIR was certified and the
First Addendum, Second Addendum, Third Addendum, and Fourth Addendum were approved, that has
since been identified. Therefore, the effects of additional cumulative development regarding cumulative
public utilities/service systems impacts do not meet the standards for a subsequent or supplemental EIR
pursuant to CEQA Guidelines, Sections 15162 and 15163.
10.0 GROWTH INDUCING IMPACTS
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 consist of a pipeline, FCF, and PRVV to transfer desalinated water from the
Approved Project to CMWD facilities. Analysis of growth-inducing impacts from the availability of water
from the Approved Project was analyzed in the FEIR. The proposed modifications are designed to
facilitate the movement of water. Therefore, the proposed modifications would not result in any
additional residential, commercial, or industrial growth from what was previously evaluated in the FEIR,
First Addendum, Second Addendum, Third Addendum, and Fourth Addendum. Therefore, no changes
relative to the analysis or conclusions related to growth inducement would occur with the proposed
modifications.
Substantial Changes with Respect to the Circumstances Under Which the Project is Undertaken/New
Information of Substantial Importance
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 FEIR, First Addendum, Second Addendum, Third Addendum, and Fourth Addendum. No
Precise Development Plan and 28 January 2018
Desalination Plant Project - Fifth Addendum
new information of substantial importance relative to growth inducement has become available since
the certification of the FEIR and the approval of the First Addendum, Second Addendum, Third
Addendum, and Fourth Addendum.
11.0 CONCLUSION
Impacts associated with the proposed modifications would not result in a new significant impact or
substantial increase in the severity of previously identified impacts per the Carlsbad Desalination Plant
2006 FEIR, the 2009 First Addendum, the 2012 Second Addendum, the 2013 Third Addendum, or the
2014 Fourth Addendum. There are no substantial changes to the circumstances under which the
Approved Project will be undertaken, and no new information of substantial importance which was not
known and could not have been known when the FEIR was certified and the First Addendum, Second
Addendum, Third Addendum, and Fourth Addendum 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, Sections 15162 and 15163. As such, this
Fifth Addendum to the FEIR satisfies CEQA requirements for the proposed modifications described
herein.
Precise Development Plan and 29 January 2018
Desalination Plant Project - Fifth Addendum
12.0 REFERENCES
City of Carlsbad. Precise Development Plan and Desalination Plant Final Environmental Impact Report.
Certified June 13, 2006.
City of Carlsbad. First CEQA Addendum for the Precise Development Plan and Desalination Plant Project
Final EIR. September 15, 2009.
City of Carlsbad. General Plan, Climate Action Plan, and Environmental Impact Report. September 2015.
Federal Emergency Management Agency (FEMA). Flood Insurance Rate Map, San Diego County,
California and Incorporated Areas, Panel 769 of 2375. Map Number 06073C0769G. Map Revised
May 16, 2012.
HELIX Environmental Planning, Inc. (HELIX). Desalination Flow Control Facility 5 Cultural Resources
Study. November 27, 2017.
San Diego Regional Airport Authority. McClellan-Palomar Airport Land Use Compatibility Plan. Amended
December 1, 2011.
San Diego County Water Authority (SDCWA). Second CEQA Addendum for the Precise Development Plan
and Desalination Plant Project Final EIR. November 29, 2012.
SDCWA. Third CEQA Addendum for the Precise Development Plan and Desalination Plant Project Final
EIR. September 26, 2013.
SDCWA. Fourth CEQA Addendum for the Precise Development Plan and Desalination Plant Project Final
EIR. July 9, 2014.
Precise Development Plan and 30 January 2018
Desalination Plant Project - Fifth Addendum
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EXISTING 18"BUTTERFLY VALVEREMOVE BLIND FLANGEAND CONNECT TOBUTTERFLY VALVE18"X14" REDUCER30" DIAMETERMANWAY4" BUTTERFLY VALVE30" DIAMETER MANWAYDESALINATION TURNOUTSTRUCTURE SECTIONDESALINATION TURNOUT STRUCTURE PLANCONCEPTUALDESALINATION TURNOUTSTRUCTURECONNECTION125DESALINATION FLOWCONTROL FACILITY 5
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