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1 <br /> were removed At the time of removal, the USTs appeared to be in good condition <br /> Monitoring well MW-3 was removed during the tank excavation and was subsequently <br /> replaced with MW-3A. Demolition of the station was undertaken in 1993 Soil <br /> closure was granted by San Joaquin County in a letter dated July 18, 1994, attached <br /> ' as Appendix C In a letter dated December 28, 1994, San Joaquin County expressed <br /> concerns regarding possible residual contamination at the site and requested additional <br /> ' site characterization <br /> ' 3 0 ADDITIONAL SITE CHARACTERIZATION <br /> ' Before commencing field activities, Mittelhauser prepared a workplan and a site Health <br /> ' and Safety Plan After San Joaquin County approved the workplan, Mittelhauser <br /> obtained drilling permits from the County The workplan addressed the specific <br /> concerns of the Technical Review Committee of the SJCPHS/EHD as stated in their <br /> letter dated December 28, 1994 <br /> A site Health and Safety Plan was prepared to establish the required level of <br /> protection and safety procedures to be used at the site This plan was prepared in <br /> accordance with Mittelhauser Corporate Health and Safety procedures <br /> 1 <br /> 3 1 FIELD ACTIVITIES <br /> As shown on Figure 2, four soil borings (ACS-1 through 4) and one water boring (WB- <br /> 1) were drilled for this investigation WB-1 was drilled inside the former UST pit, <br /> adjacent to the former location of well MW-3 The soil boring ACS-1 was drilled close <br /> to the location of former sample point SW-7 to evaluate the level of waste oil <br /> constituents Boring ACS-2 was drilled near the location of former sample point PL-7 <br /> to determine the vertical extent of potential residual gasoline constituents at that <br /> location. <br /> 2168R010 wplFebrwry 1896 2 /"ittelhauser <br /> C O R 1 11 0. A 7 1 O N <br /> 1 <br />