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FOOTHILL <br /> / EWOTNEER NO <br /> 12793 PADDY CREEK LANE LODI. CA 95240 <br /> , 2 7 PH. (209) 368-9381 FAX (209) 367-1163 <br /> Mr. Michael Infurna January 26, 2001 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O. Box 388 <br /> Stockton, CA 95201 <br /> Site Code #1038 <br /> Subject: Michael D. & Sharon Olivarez, 300 S. California St. Stockton, Ca. <br /> Monitoring Well Information and Results of Water Sample Analytical Testing <br /> Dear Mr. Infurna: <br /> QUARTERLY MONITORING WELL SAMPLING REPORT <br /> Please find below the procedure and results of quarterly monitoring well groundwater samples. <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/EHD. Soil samples taken from under the USTs and the dispensing <br /> equipment indicated the presence of hydrocarbons. Spoil from the excavation was found to.cgptain <br /> hydrocarbon contamination. <br /> 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. ,449nitoring <br /> wells MW-I 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 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#l, CPT#2 and CPT#3 have been installed. <br /> Soil and groundwater samples extracted during the installation of CPTs indicate gasoline <br /> contamination to a depth of eighty-five feet(see a recap attached). <br /> 4 <br /> On May 2 and 3, 2000 the soil borings for both MW#5 and MW#6 were made as described in the <br /> 1 <br /> I <br />