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collected in the vadose zone (above 7 feet bgs) or at depths greater than 20 <br /> t feet bgs at these locations <br />' The soil samples collected downgradient of the former UST location <br /> (HB-17) contained TPH-g and BTEX compounds from the ground water <br /> t table (approximately 7 feet bgs) to a depth of approximately 21 feet bgs <br /> Trace concentrations of xylenes was the only compound present in samples <br /> collected at a depth greater than 21 feet bgs. at this location No <br /> compounds were detected in the sample collected in the vadose zone <br /> t2 1 1 2 Ground Water <br /> As shown in Table 3, TPH-g, toluene, ethylbenzene, and xylenes were <br />' detected in the shallow ground water sample from HB-17 collected at 10 <br /> to 15 feet bgs The concentrations of these compounds detected in the <br /> ground water sample collected at 30 to 33 feet bgs were orders of <br /> magnitude less than detected at 10 to 15 feet bgs <br />' 2.1.2 UST-2 <br /> In accordance with the Workplan, ERM installed one soul boring (HB-20) <br /> downgradient of the former location of UST-2 (Figure 3) This sampling <br /> location was selected to better define the lateral and vertical extent of <br /> TPH-g and BTEX impacts downgradient of UST-2 The results of the soil <br />' and ground water samples are presented in Tables 2 and 4, respectively <br /> Copies of the laboratory analytical results are presented in Appendix A <br /> t2121 Soil <br />' As shown in Table 2, HB-20 contained concentrations of TPH-g, <br /> ethylbenzene, and xylenes from the ground water table (approximately 7 <br /> feet bgs) to a depth of approximately 22 5 feet bgs For the samples <br />' collected below 22 5 feet bgs, trace concentrations of xylenes were the only <br /> compounds detected The vadose zone sample collected at HB-20 <br /> contained no detectable concentrations of TPH-g or BTEX compounds <br />' 2122 <br /> Ground Water <br />' As shown in Table 4, TPH-g, ethylbenzene, and xylenes were detected in <br /> the ground water sample collected at 10 to 15 feet bgs The concentrations <br />' of these compounds detected in the ground water sample collected at 30 <br /> to 33 feet bgs were orders of magnitude less than detected at 10 to 15 feet <br /> 01 bgs <br /> 1 <br />