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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update CEQA Findings of Fact and Statement of Overriding Considerations 48 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/FOF/21480022 Pleasanton Housing Element FOF.docx Facts in Support of Findings: There are no large, confined water bodies within the city. Therefore, development consistent with the Housing Element Update would not result in substantial inundation by seiche during a seismic event. Inundation by Flooding: Several potential sites for rezoning are within the 100-year flood hazard zone, and a small portion of Site 22 (Merritt) is located within the 500-year flood hazard zone. Thus, all future development consistent with the Housing Element Update would be required to comply with the General Plan policies and programs and Municipal Code requirements described in Impact HYD-3. Mandatory federal, State, and local regulations govern the storage and use of hazardous materials to ensure appropriate containment to prevent spills. In addition, the General Plan, Public Safety Element, includes Goal 5, which intends to minimize the risk to lives and property due to potential exposure to hazardous materials. Goal 5 includes Policy 16, which regulates the transportation, delivery, use, and storage of hazardous materials within the city limits and Policy 17, which ensures that hazardous materials are not released as a result of construction activities and that any existing hazardous materials and potential contamination are remediated prior to development. All future development consistent with the Housing Element Update would be required to comply with the applicable regulations. Inundation by Tsunami: No portion of the city is located on a shoreline, and thus any future development consistent with the Housing Element Update would not be subject to tsunami. Overall: Future development would be subject to the General Plan policies and programs and the Municipal Code. Federal and State agencies are responsible for maintaining flood protection features in the city. Additionally, all future development would be evaluated on a project-by-project basis for impacts related to risk of pollutant release associated with flooding and inundation. Further, consistent with General Plan Public Safety Element Policy 15, all future development in the 100-year flood hazard zone would contain mitigation measures that meet the FIA criteria, and, consistent with Program 9.1, all future development would be required to pay its fair share of flood control improvements costs (Draft Program EIR, Page 3.9-34–35). Potential Effect Impact HYD-5: Development consistent with the Housing Element Update, rezonings, and General and Specific Plan Amendments would not conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan. (Draft Program EIR, Page 3.9-36). Findings: Less than significant impact. Facts in Support of Findings: As discussed under Impact HYD-1, construction and operation of any future development consistent with the Housing Element Update would be required to comply with the General Plan policies and programs, the Municipal Code, and the mandatory NPDES permit requirements. Therefore, during construction and operation, future development consistent with the Housing Element Update would not violate any water quality standards or otherwise substantially degrade surface or groundwater quality, in compliance with the Basin Plan. The General Plan contains several policies and programs that would facilitate groundwater recharge by encouraging