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Rationale for Finding: The detailed geotechnical investigation will provide measures to <br /> minimize settlement risks. Monitoring settlement of deep fills will further limit these <br /> impacts. <br /> <br /> EXPANSIVE SOIL <br /> <br /> IMPACT 9E: Changes in volume of expansive soils caused from changes in soil moisture content <br /> could cream ground movement that can damage structure foundations and other improvements. <br /> FEll page 9-16. <br /> <br /> Miti~,ation Measures 9-1.9-18 through 9-20: Expansive soils shall be evaluated as part of <br /> a detailed geotechnical evaluation, with measures developed to reduce the risk of damage <br /> to improvements fwm expansive soils. Evaluate expansion potential and provide proper <br /> design of foundation and pavement sections. Provide pwper surface drainage to control <br /> moisture level in soil. FEIR pages 9-17, 9-18. <br /> <br /> 'nEiv. ah!g: Changes or alterations have been required in, or incorporated into the pwject <br /> that avoid or substantially lessen the significant effect identified in the Final EIR. <br /> <br /> Rationale for Finding: The geotechnical evaluation will identify expansive soils, and <br /> ensure that special techniques are used on these soils to reduce the risk of damage. <br /> <br /> SEISMIC HAZARDS <br /> <br />IMPACT 9F: The PIning Area will likely experience moderately strong to very strong ground <br />motion during the life of the proposed development. Damage to structures and improvements, <br />as well as injury to people, may occur due to strong ground shaking during a major seismic event. <br />FEIR page 9-18. <br /> <br /> Mitigation Measures 9-1.9-21 and 9-22: Seismic hazards shall be analyzed as part of a <br /> detailed geotechnical evaluation. Direct and indirect effects of ground shaking shall be <br /> assessed. Design and construct structures to maintain integrity during a major seismic <br /> event. F!~TR page 9-18. <br /> <br /> Finding: Changes or alterations have been required in, or incorporated into the project <br /> that avoid or substantially lessen the significant effect identified in the Final EIR. <br /> <br /> R~onale for Finding: The seismic hazards analysis will provide satisfactory information <br /> for geotechnical standards to minimize risks due to seismic activity. <br /> <br />SITE DRAINAGE/INCREASED RUNOFF <br /> <br />IMPACT 9G: The development will result in additional runoff, which could contribute to <br />downstream flooding near Kottinger Park and in the Arroyo del Valle. FEIR page 9-19. <br /> <br /> 15 <br /> <br /> <br />