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4� <br /> ENGIOTEEIN <br /> NRG <br /> 12793 PADDY CREEK LANE LODI. CA 95240 <br /> PH. (209) 368-9381 FAX (209) 367-1 16 <br /> Mr. Michael Infurna March 25, 2002 APR 0 2 2002 <br /> San Joaquin County Public'Health Service ENVIRONMENT HEALTH <br /> Environmental Health Division PERMMSERVICES <br /> 304 E. Weber Third Floor <br /> Stockton, CA 95202 <br /> Site Code #1038 <br /> Global ID #T0607700605 <br /> Subject: Michael D. & Sharon Olivarez Property at 300 S. California St. Stockton, Ca. <br /> Monitoring Well Sampling Report <br /> Dear Mr. Infurna: <br /> Please find below the report covering first quarter monitoring activities on the above stated property. <br /> '. FIRST QUARTER 2002 MONITORING WELL SAMPLING REPORT <br /> Site History <br /> Five fuel USTs and one used motor oil tank were removed by Jim Thorpe Oil inNovember 1992 under <br /> a permit from the PHS/EHD. Soil samples taken from under the USTs and the dispensing equipment <br /> indicated the presence of hydrocarbons. Spoil from the excavation was found to contain hydrocarbon <br /> contamination. <br /> Clearwater Group submitted a Work Plan to install three soil borings with monitoring wells constructed <br /> in the same boring. The work described in the Clearwater Work Plan was completed 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 ofthose samples is attached. Monitoring wells <br /> MW-1 and MW-2 continue to contain high levels of gasoline contamination. MW-3 has much lower <br /> levels of gasoline contamination (see a recap sheet attached). <br /> On August 23, 1999,the PHS/EHD approved a Work Plan submitted by Foothill Engineering to install <br /> replacement wells for MW#1,MW#2,and MW#3.These replacement wells were installed to correct <br /> the over screen conditions of the existing monitoring wells.Also, included in this Work Plan was the <br /> installation of three CPTs. To date CPT#l, CPT42 and CPT#3 have been installed. Soil and <br /> ,. groundwater samples extracted during the installation of CPTs indicate gasoline contamination to a <br /> depth of eighty-five feet (see a recap attached). <br /> 1 <br />