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FOOTHELIL <br /> IEi�lI= 0) ENGINEERJNG <br /> 12793 PADDY CREEK LANE LOD1, CA 95240 <br /> JUL <br /> 2 2PH. (209) 368-9381 FAX (209) 367-1163 2004 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> July 21, 2004 <br /> Mr. Michael Infurna <br /> San Joaquin County Public health Service <br /> Environmental Health Department <br /> 304 E. Weber Third Floor <br /> Stockton, CA 95202 Site Code#1038 <br /> Global ID#70607700605 <br /> Subject: Michael D. & Sharon Olivarez Property at 300 S. California St. Stockton, Ca. <br /> Cone Penetration Test#7 Work Plan <br /> i <br /> I <br /> Dear Mr. Infurna: <br /> As per your request, please find below a work plan for installing cone penetration test to further <br /> define the westerly limits of the gasoline plume. <br /> i <br /> WORD.PLAN FOR CPT#7 FOR THE WESTERLY DEFINITION OF THE GASOLINE <br /> PLUME <br /> Site History <br /> Five fuel USTs and one used motor oil tank were removed by Jim. Thorpe Oil in November 1992 <br /> under a permit from the PHS/EIID. Soil samples taken from under the USTs and the dispensing <br /> equipment indicated the presence of hydrocarbons. Spoil from the excavation was found to contain <br /> hydrocarbon contamination. <br /> The Clearwater Group submitted a work plan to install three soil borings with monitoring wells <br /> constructed in the same boring. The work described in the Clearwater Work Plan was completed <br /> in March of 1995. <br /> The excavation for the removal of the USTs was backfilled by Jim Thorpe Oil in April 1996. The <br /> excavation spoil was used for backfill material. <br /> Foothill Engineering was requested by the owner to sample the three monitoring wells that were <br /> installed by Clearwater at various times and the analysis of those samples is attached. Monitoring <br /> wells'MW-1 and MW-2 continue to contain high levels of gasoline contamination.MW-3 has much <br /> lower levels of gasoline contamination (see a recap sheet attached). <br /> On August 23, 1999, the PFIS/EHD approved a work plan submitted by Foothill Engineering to <br /> 1 <br /> i <br />