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4 Environmental Analysis <br /> 4.10 Hydrology/Water Quality <br /> Groundwater Sustainability Plan was developed for multiple Groundwater Sustainability Agencies <br /> (GSA) (GEI Consultants 2021). <br /> 4.10.2.3 Local <br /> As noted earlier, the part of the Project site that will contain the proposed facility is located in San <br /> Joaquin County. However, most of the gen-tie line corridor and a small portion along the western <br /> edge of the Project site are in Alameda County. Therefore, regulations relating to hydrology and <br /> water quality from both counties are presented here. <br /> San Joaquin County <br /> Water supply and quality issues are covered in the San Joaquin County General Plan under the <br /> Public Facilities and Services Element (also known as Infrastructure and Services [IS]) and the <br /> Natural and Cultural Resources (NCR) Element. Applicable goals and their associated policies <br /> are provided below (San Joaquin County 2016): <br /> Goal IS-4: To ensure reliable supplies of water for unincorporated areas to meet the needs <br /> of existing and future residents and businesses, while promoting water conservation and the <br /> use of sustainable water supply sources. <br /> IS-4.1— Water Agency Support: The County shall support efforts of local water agencies, <br /> special district, and water conservation districts to ensure that adequate high-quality water <br /> supplies are available to support existing and future residents and businesses. (1GC) <br /> IS-4.3— Water Supply Availability: The County shall consider the availability of a long- <br /> term, reliable potable water supply as a primary factor in the planning of areas for new <br /> growth and development. (RDR/PSP) <br /> IS-4.5 — Drought Response: The County shall encourage all local water agencies to <br /> develop and maintain drought contingency and emergency services plans, emergency <br /> inter-ties, mutual aid agreements, and related measures to ensure adequate water service <br /> during drought or other emergency water shortages. (PSP/IGC) <br /> IS-4.8 — Water Conservation Measures: The County shall require existing and new <br /> development to incorporate all feasible water conservation measures to reduce the need <br /> for water system improvements. (RDR) <br /> IS-4.9— Groundwater Management: The County shall continue to support cooperative, <br /> regional groundwater management planning by local water agencies, water users, and <br /> other affected parties to ensure a sustainable, adequate, safe, and economically viable <br /> groundwater supply for existing and future uses within the County. (IGC) <br /> IS-4.12— Water Supply Planning: The County shall encourage local water agencies to <br /> develop plans for responding to droughts and the effects of global climate change, <br /> including contingency plans, water resource sharing to improve overall water supply <br /> reliability, and the allocation of water supply to priority users. (PSP/IGC) <br /> IS-4.18 — Graywater and Rainwater Systems: The County shall encourage <br /> homeowners, businesses, and developers to install graywater systems and rainwater <br /> harvest systems, consistent with local and State guidelines, regulations, and standards, <br /> in order to reduce consumption of potable water. (RDR/PSP) <br /> Griffith Energy Storage Project 4.10-8 Tetra Tech/SCH 2022120675 <br /> Draft Environmental Impact Report August 2023 <br />