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' Site Background Information West Clay Properties <br /> Page 6 of 6 <br /> 1 <br /> CPT02/137-141 BTEX constituents were detected at concentrations as high as 180 µg/l <br />' benzene(CPT01/93 5-97 5), 2,300 µg11 toluene(CPT02/137-141), 1,200 µg/1 ethylbenzene <br /> (CPT02/137-141) and 6,600 µg/l total xylenes (CPT02/137-141) <br />' HU-5 TPH-g and TPH-d were detected in the ground water sample CPT03/176-180 <br /> collected from HU-5 at concentrations of 5,400 µg/1 and 3,000 µg/l, respectively BTEX <br /> constituents were detected at concentrations of 23 µg/l (benzene), 330 µgh (toluene), 200 <br />' µg/1 (ethylbenzene) and 1,180 µg/1 (total xylenes) <br />' Former UST Cluster <br /> Analytes of concern were not detected in ground water samples collected from the soil borings <br />' advanced near the former UST cluster area <br />' IMPLICATIONS FROM VERTICAL ASSESSMENT <br /> Grab groundwater samples collected from soil borings advanced near the former UST No 3 location <br /> contained detectable concentrations of TPH-g, TPH-d and BTEX constituents at depths as great as <br /> 10 180 feet bsg Due to refusal, additional samples could not be collected from greater depths In <br /> addition, detectible concentrations of target analytes were reported by the laboratory in grab ground <br /> water samples collected from soil borings advanced down-gradient of the former UST No 3 location <br /> at depths ranging from 74 to 78 feet bsg and 178 to 182 feet bsg Neither the vertical nor the deep <br /> lateral extent of petroleum hydrocarbon-impacted ground water has been defined around the former <br />' UST No 3 location <br /> Target analytes were not detected above laboratory reporting limits in grab ground water samples <br />' collected from the former UST cluster area to depths as great as 182 feet bsg In addition, target <br /> analytes were not detected above laboratory reporting limits in grab ground water samples collected <br /> from boring CHB-01, located down-gradient from the former UST cluster location The vertical <br /> extent of impacted ground water appears to be defined at the UST cluster location,the lateral extent <br /> is not defined to the north and southwest <br /> 1 <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />