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t <br /> s <br /> r <br /> 14 <br /> FOOTHILL <br /> ENGINEERING <br /> 8442 PH:(916RIDGE <br /> 7229 5184 YFAX{996)729-0593 5843 <br /> January 24, 2007 <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 /> Ground Wate <br /> Dear Mr. Infurna: <br /> Please find below the Ground Water Remediation Action Plan for the above stated property. <br /> GROUND NATER REMEDIATICIN ACTION PLAN <br /> I <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 P1-IS1EHD. Sail 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 /> jThe 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 /> i <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 PHS/EI-ID approved a work plan submitted by Foothill Engineering to <br /> install replacement wells for MW#I, MW#2, and MW#3. These replacement wells were installed <br />