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Report of Closure Activities 4 <br /> Barbara Drake 26485 North Thornton Road Thornton Califomia Ani 16 1998 <br /> Office of Drinking Water, 1990) Approval from the PHS/EHD to Incorporate the stockpiled soil as part <br /> of the excavation backfill was secured by Fluor Daniel GTI In a telephone conversation with Mr Steve <br /> Sasson of the PHS/EHD in December 1997, after PHS/EHD had reviewed the laboratory analytical <br /> results for the stockpile soil samples <br /> Copies of laboratory analyses reports and chain-of-custody manifests for the soil samples collected <br /> September 19, 1997 are included in Appendix B <br /> 32 Excavation Backfill Compaction Testing <br /> On February 27, 1998, compaction and testing of the excavation backfill was performed by W A Craig <br /> The backfilled areas achieved a compaction rate of 91-98%,varying by location across the former <br /> excavation area A copy of the excavation backfill compaction report Is presented In Appendix C <br /> 40 REFERENCES <br /> California Department of Health Services,Office of Drinking Water(1990) Summary Maximum <br /> Contaminant Levels(MCLs) and Aaron Levels(Als) October 18, 1990 <br /> Fluor Daniel GTI, Inc, 1997 Work Plan for Well Destruchon Soil Stockpile Sampling and Excavabon <br /> Backfill September 3, 1997 <br /> 20700512 CLO FLUOR DANIEL GTI <br /> �a <br />