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Site Background Information West Clay Properties <br /> . Page 6 of 6 <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 gg/l toluene(CPT02/137-141), 1,200 µg/1 ethylbenic ,t_ <br /> (CPT02/137-141) and 6,600 µg/1 total xylenes (CPU 02/1.37-141) <br /> HU-5 TPH-g and TPH-d were detected in the ground water sample CPT03/170'-180 <br />' <br /> collected from HU-5 at concentrations of 5,400 ug/1 and 3,000 gg/l, Iespectively BTEX <br /> constituents were detected at concentrations of 23 µg/l (benzene), 330 µg/1 (toluene), 200 <br /> µ.g/1 (ethylbenzene) and 1,180 gg/l (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 ground water 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 /> lie 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-gradicnt 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 groundwater 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 groundwater 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 /> i <br /> Advanced GeoEnviron mental,Inc <br /> i <br />