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00 <br /> Problem Assessment Report December 5, 1989 <br /> USA Petroleum Station No. 65, Lotti, California AGS 87050-3 <br /> 1 <br /> F. <br /> P-3). The tanks are labeled T-1 through T-3. Information prov;ded by USA indicates <br /> tanks T-1 through T-3 are used to store regular leaded, regular unleaded, and super- <br /> unleaded gasoline, respectively. The underground gasoline storage tanks have passed <br /> i <br /> precision pressure tests conducted in February 1987, February 1988, and March 1989. <br /> There are no known septic tanks or leach fields on the property. <br /> j <br /> I <br /> Previous Work Conducted by Pacific Environmental Grou <br /> 1 <br /> Pacific Environmental Group (PEG) of Santa Clara, California, conducted a preliminary 3 <br /> environmental investigation in March 1987{Pacific Environmental GrouV,Nfarch 16, 1987). . <br /> The study was commissioned by Shell Oil Company which was considering the acquisition 3 <br /> of the site. Four.8-inch-diameter exploratory borings were drilled on Mai 6 5, 1987. Two g <br /> borings were drilled.and converted into 3-inch-diameter ground-water monitoring wells (S- <br /> 1 and S-2). Two additional boringswere drilled to 20 feet below grade (S-A and S-$). <br /> Plate-3 shows the locations of these soil borings and groundwater wells. A cagy of the <br /> _ <br /> March 16, 1987, report with the lo <br /> gs..of borings are included in Appendix A. <br /> Analyses were performed by IT Corporation analytical laboratory in Cerritos, California, <br /> (Hazardous Waste Testing Laboratory No. 112). Soil samples were analyzed for total <br /> hydrocarbons (THC) using Environmental Protection Agency. (EPA; Method 413.2. <br /> Ground-water samples were analyzed for benzene,toluene,ethylbenzene, and total xylene <br /> 4 <br /> -� <br /> IFL - <br /> - <br />