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Legend. Applicant = project applicant, City = City of Redwood City <br />Page 59 May 18, 2004 WP9.016451MMCHT645 <br />MOiiiTORING <br />VERIFIt,NTION <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 />at the bottom of the over - excavation, <br />and backfilling with suitable granular <br />material. <br />• Do not use excavated Bay mud as fill <br />beneath structures or pavement. When <br />placing substantial fill directly on top of <br />Bay mud, such as in the proposed <br />reduced and reconfigured marinas, the <br />fill might need to be placed in thin, <br />uniformly thick lifts to prevent "mud <br />waves" from forming. Mud waves can <br />damage structural elements already <br />installed, particularly piles and <br />underground utilities. <br />• The project civil engineer shall certify <br />that all relevant provisions of the <br />detailed, design -level geotechnical <br />investigations have been incorporated <br />into the grading, dredging, and <br />construction plans. <br />• All earthwork and site preparation shall <br />be performed under the direct <br />supervision of a certified engineering <br />geologist or geotechnical engineer. <br />Implementation of these measures would <br />reduce this impact to a less -than- <br />significant level. <br />Impact 11 -5: Corrosive Soils. The soil on <br />Mitigation 11 -5: Require that the detailed, <br />Applicant <br />Prepare and <br />City <br />Investigations <br />the project site is classified as "severely <br />design -level geotechnical investigations <br />implement detailed, <br />prior to grading <br />corrosive" to iron, steel, metal, and concrete. <br />recommended under Mitigations 11 -1 and <br />design -level <br />permit issuance; <br />This condition could result in long -term <br />11 -2 include an evaluation of corrosive soils <br />geotechnical <br />implementation <br />damage to building foundations and <br />within the limits of all foundation and utility <br />investigations. <br />throughout <br />underground utility systems, a possibility that <br />construction. Wherever corrosive soils are <br />construction <br />represents a potentially significant impact. <br />found in sufficient concentrations, <br />phases <br />recommendations shall be made to protect <br />iron, steel, metal, and concrete from long- <br />term deterioration caused by contact with <br />corrosive on -site soils. In general, these <br />recommendations are expected to include, <br />Legend. Applicant = project applicant, City = City of Redwood City <br />Page 59 May 18, 2004 WP9.016451MMCHT645 <br />