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1.0 INTRODUCTION On behalf of Mr. Bachitar Singh, property owner for the Jahant Food and Fuel site, Ramage Environmental has prepared this Work Plan, Monitoring Well Installations for submittal to the San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) and the Central Valley Regional Water Quality Control Board (RWQCB). On January 27, 2000, PHSIEHD approved the recommendation to prepare and submit this work plan. 1.1 Site Description The subject property is located at 24323 North Highway 99 in the town of Acampo in northern San Joaquin County, California (Figure 1). The property is situated immediately west of Highway 99 and immediately north of the Jahant Road exit ramp. It is an active gasoline and diesel fuel service station and mini-market(Figure 2). An operating domestic well is located approximately 100 feet northwest of the former USTs (Figure 2). 1.2 Previous Work On January 22, 1998, under PHSIEHD observation, L&M Construction removed three underground storage tanks (UST) at the site. The removed USTs included two 10,000-gallon and one 6,000-gallon unleaded gasoline steel tanks. According to the PHS/EHD inspection notes, each of the USTs was in poor condition, but without noticeable holes. The UST excavation was extended to the north to include the southern dispensers on both dispenser islands. The northern ends of both islands did not include dispensers. A total of eight soil samples were collected from the excavation (Figure 3). Two soil samples were collected from beneath each of the three USTs and one soil sample was collected from each of the former dispensers. All eight of the soil samples were analyzed for Total Petroleum Hydrocarbons (TPH)-as-gasoline and benzene, toluene, ethylbenzene, xylenes (BTEX) by Modified EPA Method 8020/8015, for the oxygenate additive compounds methyl tertiary butyl ether(MTBE), di- isopropyl ether(RIPE), ethyl tertiary butyl ether{ETRE), tertiary amyl methyl ether(TAME) and tertiary butanol (TBA) by EPA Method 8260, and for total lead by EPA Method 6010. Results of the soil sampling from under the former USTs,and dispenser islands indicated that significant concentrations of gasoline hydrocarbons were detected beneath the north end of the former middle UST and in shallow subsurface soil in the vicinity of the west dispenser island. The soil sample results are summarized in Table 1. The soil sample collected from 14 feet below ground surface (bgs) under the north end of the middle former UST (Tank 2) contained 4