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r <br /> 1.0 INTRODUCTION <br /> r <br /> Ramage Environmental has prepared this Work Plan, Environmental Site investigation at the <br /> request of Mr Bachitar Singh, property owner for the Jahant Food and Fuel site and Mr Harlin <br /> Knoll of the San Joaquin County Public Health Services Environmental Health Division <br /> (PHS/EHD) The cost to develop and distribute this work plan has been pre-approved by the <br /> Underground Storage Tank Cleanup Fund (USTCF), under Claim #13115 <br /> 1.1 Site Description <br /> The subject property is located at 24323 North Highway 99 in the town of Acampo in northern <br />' San Joaquin County, California (Figure 1) The property is situated immediately west of Highway <br /> 99 and immediately north of the Jahant Road exit ramp It is an active gasoline and diesel fuel <br /> Lservice station and mini-market (Figure 2) <br /> 1.2 Previous Work <br /> On January 22, 1998, under PHS/EHD observation, L&M Construction removed three <br /> underground storage tanks (UST) at the site The removed USTs included two 10,000-gallon <br /> and one 6,000-gallon unleaded gasoline steel tanks According to the PHS/EHD inspection <br /> notes, each of the USTs was in poor condition, but without noticeable holes The UST <br /> excavation was extended to the north to include the southern dispensers on both dispenser <br /> islands The northern ends of both islands did not include dispensers A total of eight soil <br /> samples were collected from the excavation (Figure 3) Two soil samples were collected from <br /> beneath each of the three USTs and one soil sample was collected from each of the former <br /> dispensers All eight of the soil samples were analyzed for Total Petroleum Hydrocarbons <br /> (TPH)-as-gasoline and benzene, toluene, ethylbenzene, xylenes (BTEX) by Modified EPA <br /> Method 802018015, for the oxygenate additive compounds methyl tertiary butyl ether(MTBE), di- <br /> isopropyl ether(DIPE), ethyl tertiary butyl ether (ETRE), tertiary amyl methyl ether(TAME) and <br /> tertiary butanol (TBA) by EPA Method 8260, and for total lead by EPA Method 6010 <br /> Results of the soil sampling from under the former USTs and dispenser islands indicated that <br /> significant concentrations of gasoline hydrocarbons were detected beneath the north end of the <br /> former middle UST and in shallow subsurface sod in the vicinity of the west dispenser island <br /> The soil sample results are summarized in Table 1 The soil sample collected from 14 feet bgs <br /> under the north end of the middle former UST (Tank 2) contained 7,000 milligrams per kilogram <br /> (mg/kg) of TPH-as-gasoline, 3 5 mg/kg of benzene, 90 mg/kg of ethylbenzene 590 mg/kg of <br /> 4 <br /> r <br />