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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update CEQA Findings of Fact and Statement of Overriding Considerations 44 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/FOF/21480022 Pleasanton Housing Element FOF.docx improve water quality. Source controls would also include storm drain messages and signage and beneficial landscape irrigation practices. The General Plan includes policies and actions intended to protect water quality in and around the City, including Water Element Program 3.4 and Program 10.2 and Public Safety Element Program 6.2 and 6.3. The Municipal Code contains rules and regulations to protect water quality during operation. Section 9.14.080 (Reduction of pollutants in stormwater) also identifies operational BMPs to reduce pollutants entering the storm sewer system. Groundwater supply Wells 5, 6, and 8 showed detection of contaminants above the Response Level for PFAS and the groundwater supply wells and were taken out of service in November 2022. This is an existing condition and, because residential uses are not uses associated with the production of PFAS, development consistent with the Housing Element Update would not exacerbate this existing condition and would not result in the further degradation of groundwater quality (Draft Program EIR, Page 3.9-26–29). Potential Effect Impact HYD-2: Development consistent with the Housing Element Update, rezonings, and General and Specific Plan Amendments would not substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin. (Draft Program EIR, Page 3.9-29). Findings: Less than significant impact. Facts in Support of Findings: Zone 7 is responsible for supplying water as a wholesaler to Pleasanton. Zone 7 provides water to the region by storing water from the South Bay Aqueduct and from local runoff in the Del Valle Reservoir, which it used to replenish groundwater supplies through release into the Arroyo del Valle and the Arroyo Mocho. The sources of water include the South Bay Aqueduct, surface runoff from the Del Valle Reservoir, and local groundwater. Groundwater supply Wells 5, 6, and 8 showed detection of contaminants above the Response Level for PFAS and the groundwater supply wells and were taken out of service in November 2022. This is an existing condition and would not be exacerbated by development consistent with the Housing Element Update because residential uses are not uses associated with the production of PFAS. Therefore, development consistent with the Housing Element Update would not result in the further degradation of groundwater quality. However, the reduction in available groundwater would impact water supply availability. General Plan Water Element Program 1.4, Program 3.11, and Program 4.10 encourage collaboration with Zone 7 to recharge aquifers and protect groundwater quality resources. Program 1.5 directs development to utilize water reclamation and recycling techniques to conserve water while protecting groundwater quality. However, Program 3.1 prevents the use of water reclamation techniques that negatively impact groundwater resources. Program 1.6 and Program 3.8 require development to evaluate the use of stormwater runoff or treated wastewater for groundwater recharge. Further, Program 3.6 prohibits the use septic systems and other waste disposal facilities that could pollute groundwater. Program 6.1 promotes the use of nonresidential landscaping where