14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Environmental Checklist Initial Study/Consistency Checklist 96 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx Environmental Issues Prior 1998 HVSP FEIR Determination CEQA Section 15183(b) Criteria Effect Peculiar to Project or Site? New Significant Effect? New Significant Off-site, Cumulative Impact? New Information, More Severe Adverse Impact? e) Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater? None No No No No f) Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature? None No No No No a) Earthquake Hazards 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) Fault Rupture The 1998 HVSP FEIR determined that the project site is located in the seismically active San Francisco Bay Region and within the San Andreas Fault System. According to the 1998 HVSP FEIR, the Verona Fault trends southeast-northwest through the eastern portion of the project site. The Verona Fault is approximately 5 miles long and is considered capable of generating a magnitude 6.3 earthquake.22 Structures and constructed slopes placed across the fault could be damaged by fault displacement. According to the 1998 HVSP FEIR, the potential impacts associated with fault rupture can be mitigated through preparation, review, and approval of a geologic report, consistent with MM H7. The 1998 HVSP FEIR concluded that impacts related to the potential for damage resulting from fault rupture was less than significant with implementation of the required mitigation. The project site is located within a State of California Earthquake Fault Hazard Zone for the Verona Fault, which crosses the site adjacent to the 25 percent slope limit. Several other faults, including the Calaveras Fa ult and Las Positas Fault , are located approximately 2 miles southwest and 4 miles east of the project site, respectively. The Greenville Fault is located approximately 10 miles to the east. The Hayward Fault is located approximately 7 miles to the southwest. The San Andreas Fault is located approximately 27 miles to the southwest. The project site is located in an area of high seismicity, as is all of the San Francisco Bay Area. However, all development associated with the 22 Wesnousky, S.G., 1986, Earthquakes, Quaternary Faults, and Seismic Hazards in California, Journal of Geophysical Research, Vol. 91, No. Bl2, pp. 12,587-12,631.