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i <br /> Clayton <br /> ..... f'.51F111 uF\Lll <br /> Cfl%WWI A%IS <br /> Table 1 <br /> N Gasoline and BTEX Concentrations in Soil Samples Collected <br /> on March 28, 1990 <br /> EpA Method MW_`1 MW 3 MW 3 <br /> Toluene 0.010 0.040 0.050 <br /> Eth ]benzene < 0.005 0.035 0.330 <br /> Xylenes < 0.005 0.460 0.730 <br /> E2'A.Metho <br /> u 8015:dor <br /> Total Petroleum < 0.300 60 68 <br /> Hydrocarbons as <br /> Gasoline <br /> All concentrations are in mg/kg (milligrams per kilogram, or parts per million) <br /> Analysis of soil samples from boreholes for wells MW-1 and MW-2 did not show <br /> detectable levels of gasoline or BTEX, except for a very low concentration of <br /> toluene in MW-1 at S feet (10 ppb). The source of the toluene is unclear. <br /> Toluene was not detected deeper in the boring nor wa: it detected in the <br /> _. groundwater. <br /> Concentrations of gasoline, toluene, ethylbenzene,and xylene in soil samples from <br /> the borehole for well MW-3, next to the old gasoline tank, exceeded LUFT <br /> guidelines. The shallow groundwater and the relatively permeable soils underlying <br /> the site increase the potential for contamination of groundwater. <br /> Table 2 <br /> N Hydrocarbon Oil and Grease Concentrations in Soil Samples Collected <br /> on March 28, 1990 <br /> SPA.Merlaod 41#� MW 1 M4�� ; M'W 2 <br /> (5 0'). : < 110 MVY 2 <br /> Hydrocarbon Oil 20 20 70 ..C 10 <br /> and Grease <br /> EPA Method 4181 MW 3 ` MW 3 RI��QCB <br /> Hydrocarbon Oil and 250 70 --100 <br /> Grease <br /> -4. <br />