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City of Pleasanton—Hidden Canyon Residences and Preserve Project CEQA Findings of Fact and Statement of Overriding Considerations FirstCarbon Solutions 41 Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480016/FOF/21480016 Pleasanton Hidden Canyon Residences and Preserve Project FOF.docx The Lead Agency finds that MM HAZ-1 is feasible, is adopted, and will further reduce impacts related to the removal and disposal of hazardous materials during construction. Accordingly, the Lead Agency finds that, pursuant to Public Resources Code Section 21081(a)(1) and CEQA Guidelines Section 15091(a)(1), changes or alterations have been required in, or incorporated into, the proposed project that mitigate or avoid the potentially significant impacts as identified in the EIR. Therefore, impacts associated with the removal and disposal of hazardous materials during construction would be less than significant with mitigation incorporated. 1.6.14 - Impact WILD-4: Flooding and Landslide Hazards Due to Post-Fire Instability/Drainage Changes Impact WILD-4: The proposed project would not expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes. Findings: Less than significant impact with mitigation incorporated. (Draft EIR, p. 3.16-15). Changes or alterations have been required in, or incorporated into, the project which avoid or substantially lessen the significant environmental effects as identified in the EIR. (CEQA Guidelines § 15091(a)(1)). Mitigation Measures Implement MM GEO-1. Facts in Support of Findings: Although the project site is located within a High Fire Hazard Severity Zone, it is located outside of a 500-year flood zone, as delineated by the General Plan. However, according to the Geotechnical Review, the northern portion of the project site has a high susceptibility to landslides and the downhill creep of colluvial soils has potential slope instability. Additionally, the northeastern and southwestern slopes of the project site are located within a designated Landslide Zone of Required Investigation by the California Geological Survey (CGS). Therefore, the proposed project would have a potentially significant impact with respect to post-fire slope instability and drainage changes. (Draft EIR, pp. 3.16-14 to 3.16-15). Although the proposed project would comply with City regulations including the City Grading and Drainage Plan, Erosion Control Measures, and Best Management Practices (BMPs), out of an abundance of caution the proposed project would also implement MM GEO-1. (Draft EIR, p. 3.16- 15). Implementation of recommendations proposed as part of the design-level geotechnical investigation required under MM GEO-1 would extend to impacts related to post-fire slope instability and drainage changes, which would be further minimized through compliance with (Draft EIR, p. 3.16-15). Therefore, implementation of MM GEO-1 would ensure that impacts of the proposed project related to post-fire slope instability or drainage changes remain less than significant. The Lead Agency finds that MM GEO-1 is feasible, is adopted, and will further reduce impacts related to post-fire slope instability or drainage changes. Accordingly, the Lead Agency finds that, pursuant to Public Resources Code Section 21081(a)(1) and CEQA Guidelines Section 15091(a)(1), changes or alterations have been required in, or incorporated into, the proposed project that mitigate or avoid