Planning Commission meeting agenda packet 7-9-25

City of Pleasanton—Vineyard Avenue Residential Project Consistency Checklist 15183 Consistency Checklist 82 borings up to a depth of eight feet below ground surface (bgs). According to the Geotechnical Investigation Report, materials encountered in the borings were predominantly dark brown, moist, stiff sandy clay with trace subangular gravel to an approximate depth of four to five feet. Below four to five feet bgs, the material generally remained sandy clay but the material became very stiff and dark to medium brown in color. In addition, the project site is relatively flat with a gradual slope. The peak elevation of 428 feet occurs near the intersection of Manoir Lane and Old Vineyard Avenue. The low point occurs near the intersection of Thiessen Street and Vineyard Avenue with an elevation of 392 feet. Grades from the east and west fall towards the center of the site creating a valley. Finally, the Geotechnical Investigation Report notes the presence of some undocumented fill along the northern project site boundary, likely the result of grading activities along Vineyard Avenue. Groundwater was not encountered in any of the exploratory borings and is estimated at depths of 25 to 30 feet bgs. The Geotechnical Investigation Report did not note the presence of either septic tanks or paleontological resources on-site. 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 and ii) Surface Fault Rupture and Strong Seismic Ground Shaking Summary of Housing Element Update FEIR The Housing Element Update FEIR indicated that the Calaveras Fault and its associated Alquist-Priolo Earthquake Fault Zone intersects the city limits along its western boundary. Because portions of Site 22 (Merritt) are underlain by this Alquist-Priolo Earthquake Fault Zone and Site 2 (Stoneridge Shopping Center, Mall) is just to the east of the fault zone, there is a risk of ground rupture at these sites. Various other sites are within 1 mile of the Pleasanton and Verona Faults and their respective Alquist-Priolo Earthquake Zones. Refer to Draft EIR Exhibit 3.6-2. The Housing Element Update FEIR concluded that compliance with California Building Standards Code (CBSC), applicable Municipal Code requirements, as well as goals, policies, and programs included as part of the General Plan,