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Section 4.0 – Environmental Setting and Discussion of Impacts <br /> <br /> <br />City of Redwood City 42 Initial Study/Mitigated Negative Declaration <br />Sandpiper Elementary School Facilities Expansion November 2016 <br />GEOLOGY AND SOILS <br /> Potentially <br />Significant <br />Impact <br />Less Than <br />Significant <br />With <br />Mitigation <br />Incorporated <br />Less Than <br />Significant <br />Impact <br />No Impact Beneficial <br />Impact <br />Information <br />Source(s) <br />Would the project: <br />c) Seismic-related ground failure, <br />including liquefaction? <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1,8,9 <br /> <br />d) Landslides? 1,8,9 <br />2) Result in substantial soil erosion or <br />the loss of topsoil? <br /> <br /> <br /> 1,8 <br />3) Be located on a geologic unit or <br />soil that is unstable, or that would <br />become unstable as a result of the <br />project, and potentially result in <br />on- or off-site landslide, lateral <br />spreading, subsidence, liquefaction <br />or collapse? <br /> <br /> <br /> 1,8 <br />4) Be located on expansive soil, as <br />defined in Table 18-1-B of the <br />Uniform Building Code (1994), <br />creating substantial risks to life or <br />property? <br /> 1,8 <br />5) Have soils incapable of adequately <br />supporting the use of septic tanks or <br />alternative wastewater disposal <br />systems where sewers are not <br />available for the disposal of <br />wastewater? <br /> 1 <br /> <br />4.6.3 Geologic and Soil Impacts <br /> <br />As previously discussed at the beginning of Section 4.0, on December 17, 2015, the California <br />Supreme Court issued an opinion in “CBIA vs. BAAQMD” holding that CEQA is primarily <br />concerned with the impacts of a project on the environment and generally does not require agencies <br />to analyze the impact of existing conditions on a project’s future users or residents unless the project <br />risks exacerbating those environmental hazards or risks that already exist. Nevertheless, the City <br />has policies and regulations that address existing conditions affecting a proposed project, which are <br />also discussed below. <br /> <br />4.6.3.1 Seismicity and Seismic-Related Hazards Impacts (Checklist Question 1 a – d) <br /> <br />The project site is not within an Alquist-Priolo Earthquake Fault Zone, and there are no known faults <br />crossing the project site. For these reasons, the likelihood of fault rupture on the site is low. The <br />project site is located in a seismically active region and strong ground shaking would likely occur at <br />the project site during the life of the project. The potential for liquefaction, liquefaction induced <br />differential settlement, and lateral spreading is low. The project shall be designed and constructed in <br />7.A. - Page 73