Planning Commission Agenda Packet 09092026

City of Pleasanton—Additional Housing Sites Rezonings Project CEQA Guidelines Section 15164 Addendum Addendum 99 Proposed Project Analysis and Conclusion Future development on the proposed sites would be of the same general type, scale, and intensity as development contemplated and evaluated in the Prior FEIR and, therefore, would be subject to the same regulatory framework and similarly required to comply with applicable General Plan and Municipal Code regulations that would maximize groundwater infiltration and ensure sufficient groundwater supplies. Furthermore, future development would not be likely to increase the area of impervious surfaces, as the proposed sites are currently hardscaped. The proposed project would not expand the scope of development evaluated, introduce new development types, or increase development intensity beyond what was previously analyzed. The addition of new housing and commercial space would result in an increase in connections to the municipal water supply, which could potentially increase demand on groundwater supplies as provided by Zone 7. Zone 7 is responsible for supplying water as a wholesaler to the City by storing water from the South Bay Aqueduct and from local sources, including the Del Valle Reservoir, which is used to replenish groundwater supplies through release into the Arroyo del Valle and the Arroyo Mocho. Because the proposed project is within the scope of what was analyzed in the certified Housing Element Update FEIR, potential impacts to groundwater demand have already been considered, and future development would be required to comply with applicable federal, State, and local regulations with regard to water demand and supply. Therefore, the proposed project would not result in significant impacts related to groundwater supplies or recharge. Impacts would be less than significant, and the proposed project would not result in a new or more severe adverse impact that was not previously identified and disclosed in the Prior FEIR. No further analysis is required. d) Risk of Pollutant Release Due to Inundation Would the project: In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation? Summary of Prior FEIR Impacts related to flooding risks are discussed above. Although the Prior FEIR did not evaluate potential impacts related to tsunami or seiche zones, the Prior FEIR concluded that with implementation of General Plan policies and actions, the impacts due to dam failure would be less than significant.