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Richard Zimmerman MA <br />23 June 1986 2 WEISSASSOCIATEs <br />TABLE 1. Analytic Results <br />Compound Soil Sample S1 Ground Water Sample W <br />THC <br />450 ppm <br />28 ppm <br />Benzene <br />2.4 ppm <br />1.6 ppm <br />Toluene <br />4.0 ppm <br />2.6 ppm <br />Xylenes <br />14 ppm <br />3.1 ppm <br />PCBs <br /><4.0 ppm <br />0.0004 ppm <br />EDB <br /><0.01 ppm <br /><0.5 ppm <br />TCE <br />Not analyzed <br />0.094 ppm <br />The action levels for the tested compounds are: <br />Benzene 0.0007 ppm <br />Toluene 0.1 ppm <br />Xylenes 0.62 ppm <br />PCBs 50 ppm soil (TTLC), 5 ppm water (STLC) <br />EDB 0.00005 ppm <br />TCE 0.005 ppm <br />BTX, EDB and TCE concentrations in the waste oil tank excavation exceed <br />these action levels. Based on these concentrations the regulatory agencies <br />may require further investigation to better define the extent and degree of <br />contamination and assess appropriate remedial actions. If additional work is <br />required WA believes the following work would achieve these goals: <br />o Remove the two additional underground tanks on site; <br />o Sample the soil and ground water in these excavations; <br />o Analyze the samples for THCs, BTX, EDB, PCBs; <br />o Report analytic results to regulatory agencies and <br />o Address further investigations on a site -wide basis instead of a <br />tank -specific basis. <br />