Planning Commission Agenda Packet 09092026

City of Pleasanton—Additional Housing Sites Rezonings Project CEQA Guidelines Section 15164 Addendum Addendum 75 a) Earthquakes Would the project: Directly or indirectly cause potential substantial adverse effects, including the risk of loss, injury or death involving: (i)Rupture of a known earthquake fault, as delineated on the most recent Alquist- Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault; (ii) Strong Seismic Ground Shaking; (iii) Seismic-related ground failure, including liquefaction; or (iv) Landslides. i) Surface Fault Rupture Summary of Prior FEIR The Prior FEIR found that implementation of the General Plan would not expose people or structures to rupture of a known earthquake fault, strong seismic ground shaking, seismic-related ground failure, or landslides at a program level. The Prior FEIR explained that the General Plan is a policy-level document, and future development would be subject to site-specific review, including compliance with applicable seismic safety regulations and engineering standards. These standards include requirements from State law and local policies contained in the General Plan’s Public Safety Element, which govern building design, site suitability, and hazard avoidance. The analysis reflected that while the region is seismically active, the risks associated with seismic hazards would be addressed through regulatory compliance and geotechnical evaluation at the project level. As such, the General Plan itself does not directly result in increased exposure to seismic hazards, nor does it substantially exacerbate existing risks. The Prior FEIR concluded that impacts would be less than significant. Proposed Project Analysis and Conclusion The proposed sites are not underlain by Alquist-Priolo Earthquake Fault Zones; therefore, there is not a risk of ground rupture at the proposed sites. Furthermore, future development would be constructed in accordance with the seismic design parameters established by the most recent requirements of the CBC. As such, impacts related to seismic rupture of a known earthquake fault were adequately addressed in the Prior FEIR. Therefore, there would be no impact, 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.