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EDB was detected in one sample (MW-14 at 0 55 ppb), no lead was detected during the <br /> June 1994 sampling The analytical results are summarized in Table 3 The laboratory report <br /> and chain-of-custody are included in Appendix B <br /> 1,2-Dichloroethane was detected in MW-13, MW-14 and EW-1 at concentrations of 5 6 ppb, <br /> 8 5 ppb and 5 8 ppb, respectively No other volatile halocarbons were detected in any of the <br /> water samples The analytical results are summarized in Table 3 The laboratory results and <br /> chain-of-custody are included in Appendix B <br /> 43 Fecal Coliform - <br /> The fecal coliform samples were analyzed using multiple tube coliform test (three dilutions <br /> of 5 tubes, method 908C) The results for MW-14 were ND, the results for EW-1 were 6 <br /> MPN (Most Probable Number) The laboratory results and chain-of-custody are included <br /> in Appendix B <br /> I4.4 Drum Sampling Results <br /> No petroleum hydrocarbons were detected in the composite water sample from drums D-1 <br /> through D-5 (purge water from MW-14 and EW-1) TPH as gasoline was detected in the <br /> composite soil sample from drums B-1, VW-6 and VW-7 at 3 1 ppm No BTE&X were <br /> liedetected <br /> 5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> 5.1 Groundwater Depth and Flow Direction <br /> Groundwater elevation has decreased (dropped) about 15 feet throughout the site since <br /> March 1993 (see Table 1) During the previous monitoring a 0 75 foot increase was noted <br /> throughout the site Groundwater elevation fluctuations at the site are in accordance with <br /> seasonal variations of groundwater depth in the region The groundwater flow direction <br /> continues to be to the south-southwest <br /> 5.2 Petroleum Hydrocarbon Impacted Groundwater <br /> Samples from MW-11, MW-12 and EW-1 showed a decrease of hydrocarbons Samples from <br /> MW-7, MW-10 and MW-14 showed slight increases in petroleum hydrocarbons The sample <br /> from MW-6 showed a more significant increase in TPH (80 ppb in March 1994 to 990 ppb <br /> in June 1994) MW-13 continues to be non-detect for TPH and BTE&X Tables 2 and 3 <br /> present historical information on groundwater contamination at the Geweke Site <br /> I Figure 5 is an iso-concentration snap of TPH as gasoline at the site TPH as gasoline <br /> concentrations from March 1994 are included on the map As indicated by Figure 5, the <br /> Genbg.-+I Aud 1 Scrvce. ,o <br /> 1 3316 514101DM 4M4 10 <br />