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22 June 1998 <br /> AGE-NC Protect No 95-0173 <br /> IPage 3 of 5 <br /> water monitoring event is depicted in Figure 3 <br /> I3 2 DISSOLVED OXYGEN MEASUREMENTS <br /> During the April 1998 ground water monitoring event, dissolved oxygen measurements were <br /> recorded immediately following purging the monitoring wells Dissolved oxygen measurements <br /> ranged from 0 34 mg/l (AW-2B)to 1 98 mg/l (MW-7) Results of dissolved oxygen in ground water <br /> samples are sunvnarized In Table No 2 <br /> 3 3 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> Utilizing EPA method 8015M, TPH-g was detected in ground water samples collected from wells <br /> MW-1 through MW-4, MW-6, MW-8, MW-9, VW-1 and AW-IB at concentrations ranging as high <br /> as 260,000 parts per billion (ppb, reported as micrograms per liter), TPH-d was detected In samples <br /> collected from MW-1 through MW-9, VW-1 and AWAB at concentrations ranging as high as <br /> . 25,000,however the laboratory reported that the chromatograms for the samples did not have typical <br /> diesel characteristics <br /> Utilizing EPA method 8020, BTE&X compounds were detected In samples collected from wells <br /> MW-I through MW-4, MW-6, MW-8, MW-9, VW-1, AW-1 and AW-2 at concentrations ranging <br /> up to 71,000 ppb (toluene, VW-1) Benzene concentrations were detected In gzound water samples <br /> I collected from wells MWA through MW-4, MW-6, MW-9, VW-1, AW-1 and AW-2 at <br /> concentrations ranging as high as 23,000 ppb (MW-3) MTBE was detected in well AW-2 at a <br /> concentration of 2 6 ppb however analysis of the sample by EPA Method 8260 did confirm the <br /> presence of MTBE in the sample <br /> Utilizing EPA method 8260, MTBE, TAME, DIPE, ETBE and TBA were not detected in the <br /> laboratory analysis of any ground water samples The analytical results for ground water samples <br /> are summarized in Table 3 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on the results of ground water monitoring and sampling activities performed in April 1998, <br /> AGE concludes <br /> Ground water flow direction at the site (the area containing wells MW-1 through MW-9, <br /> Advanced Geo£nironmental,Inc <br />