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somehow be related to the problems encountered during the drilling and completion of this well (see section 3 1) Figure 5 was drawn using the data from February 16, but ignoring the data from MW-5 The gradient averages approximately 0 003 ft/ft directed S 10° W This gradient its more shallow than the previous measurement of 0 05 ft/ft directed westward in November 1992 4.3 Field and Laboratory Evidence of Contamination Volatile organic vapors were measured at levels in excess of 10,000 ppm during drilling However, very slight hydrocarbon odors were noted only in two soil samples (MWS at 25 feet and MW6 at 60 feet) The high vapor readings were due to considerable background interference from gasoline station operations, including the dispensing of gasoline and propane, and are not representative of actual soil conditions Many readings were not Irecorded, due to the obvious background interference Fourteen soil samples were analyzed for TPH as gasoline and BTE&X No contamination was detected in any of the samples analyzed The laboratory report and chain-of-custody for the soil samples are )Included in Appendix B TPH as gasoline was detected in the water sample from MW-2 at 85 ppb Benzene and toluene were detected in samples from MW-2 and MW-6 Toluene was detected in MW-2 and MW-5 The analytical results are summarized on Table 3 The laboratory report and chain-of-custody for the water samples are included in Appendix C TABLE 3 - ANALYTICAL RESULTS OF WATER SAMPLES (A91L) Sample TPH as Etliyl- ID Gasoline Benzene Toluene benzene Xylene MW-1/1-26-94 ND ND ND ND ND ' MW-2/1-26-94 85 24 099 ND 11 MW-3/1-26-94 ND ND ND ND ND MW-4/1-26-94 ND ND ND ND ND MW-5/1-26-94 ND ND 077 ND ND I MW-6/1-26-94 ND 27 ND ND 18 119/1= parts per billion(ppb) ND = None Detected 1 GeOIO&41I qyyi SCNxu.,t0.0 �2 Ipcte Eord bacon ORA 91,1665