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ft , ME <br /> ., <br /> FEB ° 2° <br /> HENCTH FOOTHILL <br /> y ENV�R�� N V1C� ENGINEERING <br /> 12793 PADDY CREEK LANE LODE, CA 95240 <br /> PH. (209) 368-9381 FAX<209) 367-1163 <br /> u <br /> February 6, 2004 <br /> Mr. Michael Infuma <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#T0607700605 <br /> Subject: Michael D. & Sharon Olivarez Property at 300 S. California St. Stockton, Ca. . <br /> Fourth Quarter Site Monitoring Event <br /> Dear Mr. Infurna: <br /> Please find below the report covering fourth quarter site monitoring activities on the above stated <br /> property. <br /> FOURTH QUARTER 2003 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 <br /> t under a permit from the PHS/EHD. Soil samples taken from under the USTs and the dispensing j <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 /> I <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 ofgasoline contamination.MW-3 has much <br /> lower 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 <br /> install replacement wells for MW#1,MW#2, and MW#3. These replacement wells were installed <br /> to correct the over screen conditions of the existing monitoring wells. Also, included in this work <br /> plan was the installation of three CPTs.To date CPT#1,CPT#2 and CPT#3 have been installed. Soil <br /> and groundwater samples extracted during the installation of CPTs indicate gasoline contamination <br /> t� to a depth of eighty-five feet (see a recap attached). <br /> l <br />