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City of Pleasanton–10x Genomics Project Environmental Checklist and
<br />Initial Study/Mitigated Negative Declaration Environmental Evaluation
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<br />FirstCarbon Solutions 69
<br />Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480024/ISMND/wp/21480024 10x Genomics Project Full Screencheck ISMND.docx
<br />Services, Inc., and the results of the Paleontological Records Search provided by Kenneth L. Finger,
<br />PhD., conducted on December 16, 2020, at the California Museum of Paleontology database. These
<br />documents are included as Appendix E of this report.
<br />Would the project:
<br />a) Directly or indirectly cause potential substantial adverse effects, including the risk of loss, injury
<br />or death involving:
<br />i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo
<br />Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other
<br />substantial evidence of a known fault? Refer to Division of Mines and Geology Special
<br />Publication 42.
<br />Less than significant impact. The project site is located in a regional area of high seismicity.
<br />According to the Geotechnical Investigation, the major active faults in the area are the Hayward,
<br />Calaveras, Mount Diablo, San Andreas, and Green Valley Faults .38 The site is not within an
<br />Earthquake Fault Zone, as defined by the Alquist-Priolo Earthquake Fault Zoning Act, and no known
<br />active or potentially active faults exist on the project site. The nearest Alquist-Priolo mapped fault
<br />zone is the Calaveras Fault, located 0.37 mile west of the project site,39 which has a 25 percent
<br />probability of a magnitude 6.7 or greater earthquake within 30 years. The next nearest fault is the
<br />Mount Diablo Fault, located 5.59 miles northeast of the project site, which has a 4 percent
<br />probability of a magnitude 6.7 or greater earthquake within 30 years.
<br />In addition to the active faults, the potentially-active Pleasanton fault terminates approximately 2.6
<br />kilometers northeast of the site.40 In any seismically active area, the remote possibility exists for
<br />future faulting in areas where no faults previously existed; however, b ased on available evidence, the
<br />Geotechnical Investigation concluded the risk of surface faulting and consequent secondary ground
<br />failure at the site is considered low.41 Therefore, the proposed project would not cause substantial
<br />adverse effects associated with fault rupture. Impacts associated with fault rupture would be less
<br />than significant.
<br />ii) Strong seismic ground shaking?
<br />Less than significant impact with mitigation incorporated. The region in which the project site is
<br />located is considered seismically active. Small earthquakes occur within the region every year, and
<br />large earthquakes have occurred and are expected to occur in the future; therefore, during a major
<br />earthquake, strong seismic ground shaking is expected to occur at the project site.
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<br />38 Forrest, T.M., Gildea, P., Flessas, M.G. 2020. Geotechnical Investigation, 10x Genomics Building 1, 1701 Springdale Avenue,
<br />Pleasanton California. December 3.
<br />39 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025, Chapter 5, Public Safety Element, Figure 5-5, Alquist-Priolo
<br />Earthquake Fault Zone. Website: https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899. Accessed
<br />February 2, 2021.
<br />40 Forrest, T.M., Gildea, P., Flessas, M.G. 2020. Geotechnical Investigation, 10x Genomics Building 1, 1701 Springdale Avenue,
<br />Pleasanton California. December 3.
<br />41 Ibid.
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