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fr <br /> Proposed Work Plan November 4 , 1988 <br /> U.S.A. Petroleum Starion No. 65, Lodi, California AGS 87050-3 <br /> i <br /> S-B) were drilled to a depth of 20. 0 feet, and two boreholes <br /> where drilled to a depth of 50. 5 feet. Ground-water monitoring <br /> wells S-1 and S-2 (2-inch inside diameter) were installed to a <br /> depth of approximately 49 feet in the two deeper boreholes. The <br /> locations of the PEG boreholes and monitoring wells are shown on <br /> the Generalized Site Plan. The results of analyses of soil and <br /> water from borings S-A, S-B, and S-2 are shown in Table 1. <br /> Concentrations of benzene, toluene, and total xylene isomers in <br /> water samples were greater than the maximum acceptable <br /> concentrations for drinking water recommended by the California <br /> Department of Health Services. <br /> The 'results of initial site work indicated a need for further <br /> assessment of hydrocarbon contamination. At the request of <br /> U.S .A. Petroleum, Applied GeoSystems installed three ground-water <br /> monitoring wells at the site on August 11 and 12 , 1987, to <br /> further delineate the extent of ground--water contamination <br /> initially detected. Monitoring wells MW-1 and MW-2 were <br /> installed in the upgradient direction to the northwest and <br /> northeast of the underground tanks. Monitoring well MW-3 was <br /> installed to the south of the tanks in the downgradient <br /> direction. <br />�r <br /> 3 <br /> A,ov/ied GeoSystems <br />