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Color Spot, Inc. SGD5 <br /> March 19, 1991 (M88168F) <br /> soil or to reach ground water. When ground water is shallow enough to be reached <br /> using available equipment (i.e. , less than 50 feet) , it may be appropriate to <br /> drill the boreholes so they are suitable for well installations." Because a <br /> "depth of contaminated soil" was not encountered in any of the four drill holes, <br /> coupled with the fact that ground water exists at the site at well beyond a depth <br /> of 50 feet, it was (and is) our conclusion that ground water assessment is not <br /> necessary at this site. <br /> Laboratory analytical results of the soil samples collected indicated <br /> that contamination concentrations in excess of DWS do not exist within the <br /> vicinity of the former UST. Benzene and toluene concentrations were not <br /> detected. <br /> Additionally, SGD was able to collect a ground water sample from <br /> within the hollow stem auger at one of the drill holes at a depth of approxi- <br /> mately 92 feet below the ground surface. This ground water sample was collected <br /> from inside the hollow stem auger because the drill rig had reached its <br /> mechanical limit and the construction of a proper ground water monitoring well <br /> was not possible. Laboratory analytical results indicated that the ground water <br /> sample did not contain detectable concentrations of hydrocarbon contamination. <br /> . F� <br />