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I <br />' PROPOSAL FOR <br /> SITE CLEANUP CONFIRMATION <br /> THE SOUTHLAND CORPORATION <br /> I 7-ELEVEN PROPERTY NO. 20680 <br /> 9110 THORNTON ROAD <br /> STOCKTON, CALIFORNIA <br /> MAY 5, 1992 <br /> I1.0 INTRODUCTION <br /> Groundwater Technology, Inc submits this proposal to the San Joaquin County Public Health <br /> Services (SJPH) on behalf of The Southland Corporation (Southland) to propose a scope of work for <br /> confirmation of site cleanup for the Southland property located at 9110 Thornton Road in Stockton, <br /> California (Figure 1) The proposed scope of work presents a phased approach wherein data will be <br /> collected and reviewed to confirm the remediation of the source area soils <br /> Because site soil and groundwater data indicate that subsurface remediation efforts have <br /> Isuccessfully met the site cleanup objectives for soil and groundwater, this proposed scope of work <br /> is to confirm that site cleanup is complete If site cleanup is confirmed, then a request for site <br /> closure will be submitted <br /> I This proposal contains a Site Background section which summarizes historic groundwater and soil <br /> data The Scope of Work is then presented, followed by a detailed description of the individual work <br /> steps to confirm site cleanup, recommendations to initiate reductions in site activities, and the <br /> proposed project schedule <br /> 2.0 SITE BACKGROUND <br /> I21 Site Assessment and Remediation Activities Summary <br /> IA precision tank system test conducted on March 28, 1986 detected a failure of the unleaded <br />. gasoline tank system On April 2, 1986, the unleaded tank and dispensing system was shut down <br /> Groundwater Technology was contracted by Southland in April 1986 to investigate the subsurface of <br /> GROUNDWATER <br /> ___ _TECHNOLOGY, INC <br />