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' Ground water elevations at the site were calculated to be between 26.75 feet and 26.85 feet <br /> • below mean sea level;the groundwater gradient was calculated to be approximately 0.0005 <br /> ' ft/ft directed towards the northeast. <br /> • TPH g and TPH ss were detected in ground water monitoring well samples collected at <br /> concentrations of 180 and 99 µg/l, respectively, in the sample from well MW-5 and at 140 <br /> ' and 82 µg/1, respectively, in the sample from well MW-6. <br /> • TPH-d was detected in ground water monitoring well samples collected at concentrations of <br /> 110 µg/1 in the sample from well MW-5 and at 100 µg/1 in the sample from well MW-6. <br /> • Xylene was detected in the water sample collected from well MW-6 at 1.0 µg11. <br /> • Ethanol was detected in the water sample collected from well MW-6 at 6,400µg/1 and in the <br /> sample from well MW-7 at 1,700 µg/l. (Note: this concentration of ethanol may be derived <br /> from the well construction material - coated bentonite pellets.) <br /> • No other petroleum hydrocarbon constituents or fuel oxygenated compounds were detected <br /> during the laboratory analysis. <br /> Ground water well casing, depth to ground water and elevation data are summarized in Table 1. <br /> Analytical results of the ground water monitoring well samples collected are depicted in Table 2. <br /> lie <br /> • <br /> ' Advanced GeoEnvironmental,Inc. <br />