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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. 2 SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 2 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: SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 3 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. SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 4 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. SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 5 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 SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 6 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 SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 (PUB2017-0033) – DESALINATION FLOW CONTROL FACILITY 5 March 7, 2018 Page 7 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 OR I O N S T OR I O N S T FFAARRAADDAAYY AAVV EL C A M I N O R E A L EL C A M I N O R E A L Desalination Flow Control Facility 5 SDP 2017-0010/CUP 2017-0012/SUP 2017-0007 SITE MAP JPALOMARAIRPORTRD E L CAMREALLA COST A AV C ARLSBA DBLC A R LSB A DVILLAGEDR ELCAMINOREAL MELR O SED RAVIARAPY RA NCHO S A NTAFERDCOLL EGEBLSITE 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 i 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. Precise Development Plan and 4 January 2018 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 Precise Development Plan and 5 January 2018 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 Precise Development Plan and 6 January 2018 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. Precise Development Plan and 7 January 2018 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 Precise Development Plan and 8 January 2018 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. Precise Development Plan and 9 January 2018 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 Precise Development Plan and 10 January 2018 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. Precise Development Plan and 11 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 12 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 13 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 14 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 15 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 16 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 17 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 18 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 19 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 20 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 21 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 22 January 2018 Desalination Plant Project - Fifth Addendum 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 Precise Development Plan and 23 January 2018 Desalination Plant Project - Fifth Addendum 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. Precise Development Plan and 24 January 2018 Desalination Plant Project - Fifth Addendum 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 THIS PAGE INTENTIONALLY LEFT BLANK STREET FRONTAGE ELEVATION1313CUPCUP 2017-0012ATTACHMENT 4 5038112 122 123 124 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 DESALINATION FLOW CONTROL FACILITY 5 PLAN18’-0"37’-9" DESALINATION FLOWCONTROL FACILITY5 ABOVE GRADEPLANFROMDESALINATIONTURNOUTSTRUCTURE2"AIR/VACUUMVALVE2"AIR/VACUUMVALVE126DESALINATION FLOWCONTROL FACILITY 5 FROMDESALINATIONTURNOUTSTRUCTURE2"AIR/VACUUMVALVEDESALINATION FLOWCONTROL FACILITY5 SECTION DESALINATION FLOWCONTROL FACILITY5 ABOVE GRADESECTION2"AIR/VACUUMVALVE127DESALINATION FLOWCONTROL FACILITY 5 10’-0"14'-0"FROMDESALINATIONTURNOUTSTRUCTURE12" DIAMETERPIPETO CONNECTION ONEL CAMINO REALBLIND FLANGEBELOW GRADEPRESSURE REDUCINGVALVE VAULT PLANBELOW GRADEPRESSURE REDUCING VALVE VAULT - PLAN128DESALINATION FLOWCONTROL FACILITY 5 129LIGHT BROWN FINISH 1210LIGHT BROWN FINISH 1211