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Legend. Applicant = project applicant, City = City of Redwood City <br />Page 53 May 18, 2004 WP9.016451MMCHT 645 <br />MUMTORING <br />VERIFICATION <br />IDENTIFIED IMPACT <br />RELATED MITIGATION MEASURE <br />Impl. <br />Type of Impl. <br />Monitoring and <br />Timing <br />Signature <br />Date <br />(CONDITION OF APPROVAL) <br />Entity <br />Action <br />Verification Entity <br />Requirements <br />design. If adequate recycling provisions are <br />of this measure would reduce the impact to <br />not ultimately included, the project could <br />a less- than - significant level. <br />conflict with state - mandated waste stream <br />reduction requirements, representing a <br />potentially significant impact. <br />SOILS AND GEOLOGY <br />Impact 11 -1: Geotechnical Hazards <br />Mitigation l l -1: As recommended by the <br />Applicant <br />Prepare and <br />City <br />Investigations <br />Associated with Project Grading. The <br />applicant - commissioned Treadwell & Rollo <br />implement detailed, <br />prior to grading <br />interaction of existing geotechnical conditions <br />preliminary geotechnical investigation, <br />design -level <br />permit issuance; <br />on the project site with the proposed grading, <br />require the applicant to retain a registered <br />geotechnical <br />implementation <br />dredging, and surface modifications- -and their <br />engineering geologist or geotechnical <br />investigations. <br />throughout <br />combined effect on surface settlement, <br />engineer to prepare detailed, design -level <br />construction <br />seismic hazards, and soil erosion - -have the <br />geotechnical investigations to guide the <br />phases <br />potential to result in significant adverse <br />design of all project grading, dredging, and <br />effects. The applicant's preliminary <br />stabilization activities. The detailed, design - <br />geotechnical investigation ( Treadwell & Rollo, <br />level geotechnical investigations shall be <br />June 21, 2001) made an initial assessment of <br />performed for each of the structures <br />these conditions, but a design -level <br />proposed for the project site. Subsurface <br />geotechnical investigation would be needed to <br />conditions shall be explored and laboratory <br />adequately address all grading, dredging, and <br />tests conducted on selected soil samples to <br />stabilization activities on the site. Without <br />establish strength parameters for foundation <br />such a study - -and without the associated <br />design and perimeter slope stability, and for <br />supervision of an engineering geologist or <br />corrosivity potential of the fill and Bay mud <br />geotechnical engineer during project grading, <br />on foundation elements and buried utilities. <br />dredging, and construction - -the safety and <br />Specific recommendations shall be <br />long -term stability of project improvements <br />developed for foundation support for each <br />could not be assured. These possible <br />building, slab -on -grade floors, pavements, <br />geotechnical hazards represent a potentially <br />bulkheads, and slope inclinations for <br />significant impact. <br />permanent slopes. The detailed, design - <br />level geotechnical investigations shall <br />include subsurface investigation to further <br />identify the thickness and the consolidation <br />characteristics of the Bay mud underlying <br />the project site. Recommendations from the <br />investigation shall be incorporated into <br />project grading, dredging, and construction <br />plans to the satisfaction of the City <br />Engineer. <br />The detailed, design -level investigations, <br />relevant recommendations, and all <br />associated project grading, dredging, filling, <br />Legend. Applicant = project applicant, City = City of Redwood City <br />Page 53 May 18, 2004 WP9.016451MMCHT 645 <br />