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I <br /> FOOTHILL <br /> 10ENGINEERING <br /> .fir Z 12793 PADDY CREEK LANE LODI. CA 95240 <br /> PH. (209) 368-9381 FAX (209) 367-1163 <br /> Mr. Michael Infurna July 30, 2001 <br /> San Joaquin County Public Health Service, Envir. Health Div. <br /> 304 E. Weber Third Floor <br /> Stockton, CA 95202 <br /> Site Code #1038 <br /> Subject: Michael D. & Sharon Olivarez Property at 300 S. California St. Stockton, Ca. <br /> Monitoring Well Sampling Report <br /> Dear Mr. lnfurna: <br /> Please find below the report covering second quarter monitoring activities on the above stated property. <br /> SECOND QUARTER 2001 MONITORING WELL SAMPLING REPORT <br /> Site History <br /> Five fuel USTs and one used motor oil tank were removed by Jim Thorpe Oil in November 1992 under <br /> a permit from the PHS/EHD. Soil samples taken from under the USTs and the dispensing equipment <br /> indicated the presence ofhydrocarbons.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.,vue re <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#1, CPT#2 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 /> On May 2 and 3,2000 the soil borings for both MW#5 and MW#6 were made as described in the Work <br /> Plan of 311712000. Monitoring wells were installed in both of these soil bores. The Work Plan:b� c <br /> 1 <br />