Planning Commission meeting agenda packet 7-9-25

City of Pleasanton—Vineyard Avenue Residential Project Consistency Checklist 15183 Consistency Checklist 84 would be less than significant. Furthermore, according to the Geotechnical Investigation Report, the site is not located in an earthquake fault zone as designated by the State of California. Based on the above, impacts related to seismic rupture of a known earthquake fault or strong seismic ground shaking were adequately addressed in the Housing Element Update FEIR, and the proposed project would not result in any effects that would require further CEQA review for this topic. iii) Seismic-related Ground Failure, Including Liquefaction Summary of Housing Element Update FEIR As indicated in the Housing Element Update FEIR, several sites are within areas susceptible to very low and moderate liquefaction during an earthquake (refer to Draft EIR Exhibit 3.6-5). The Housing Element Update FEIR also indicated that liquefaction-induced lateral spreading could occur in low lying areas within the City. As such, development consistent with the Housing Element Update could potentially be exposed to the effects of landslides, slope instability, liquefaction, subsidence, and lateral spreading from local and regional earthquakes. The Housing Element Update FEIR concluded that compliance with California Building Standards Code, applicable Municipal Code requirements, as well as goals, policies, and programs included as part of the General Plan, and the Vineyard Avenue Corridor Specific Plan (as applicable) would protect residents, structures, and infrastructure from the effects of surface fault rupture and strong seismic ground shaking, including the secondary effects of earthquake shaking such as, but not limited to, liquefaction. Therefore, it was concluded that impacts related to seismic-related ground failure, such as liquefaction, ground settlement, lurching, lateral spreading, and ground cracking would be less than significant at the programmatic level. Proposed Project Analysis and Conclusion Liquefaction is a phenomenon in which granular material is transformed from a solid state to a liquefied state as a consequence of increased pore-water pressure and reduced effective stress. Increased pore-water pressure is induced by the tendency of granular materials to densify when subjected to cyclic shear stresses associated with earthquakes. According to the Geotechnical Investigation Report prepared for the proposed project, Lots 25 through 27 are located within a Liquefaction Zone of Required Investigation. Therefore, the Geotechnical Investigation Report concluded