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' 06 May 2002 <br /> AGE-NC Project No 95-0111 <br />' Page 3 of 4 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' TPH-g and BTEX compounds were not detected at or above laboratory reporting limits in the ground <br /> water samples TPH-d was detected in the ground water samples collected from wells MW-1,MW-4 <br />' and MW-5 at concentrations of 1,100 µg/1, 1,200 µg/1 and 410 µg/l, respectively <br />' MTBE was detected by EPA Method 8020 in the sample collected from MW-1 at a concentration <br /> of 63 µg11 Utilizing EPA method 8260,MTBE was confirmed in the same ground water sample at <br /> a concentration of 78µg/l and detected in the samples collected from wells MW-7 and MW-8 at <br />' concentrations of 12 µg/1 and 4 7 µg/l, respectively No other fuel additives were detected at or <br /> above laboratory reporting limits in the ground water samples analyzed <br /> Analytical results of the ground water samples are summarized in Tables 2 and 3 The laboratory <br /> report(MAI Laboratory I D Nos 0203416-001 through 0203416-008),quality assurance and quality <br /> control report and cham-of-custody forms are included in Appendix B <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> lie Based on the findings from this investigation, AGE concludes <br /> • The northerly ground water flow direction inferred from data collected during this <br /> monitoring event is consistent with ground water flow directions determined during past <br /> monitoring events at the site <br /> • TPH-d was detected in the ground water samples collected from wells`MW-1, MW-4 and <br /> MW-5 at concentrations of 1,100 µg/1, 1,200 µg/l and 410 gg/l, respectively TPH-g and <br /> BTEX compounds were not detected at or above laboratory reporting limits in the ground <br /> water samples <br />' • MTBE was detected by EPA Method 8260 in the samples collected from MW-1,MW-7 and <br /> MW-8 at concentrations of 78 gg/l, 1 2 µg/1 and 4 7 µg/l, respectively No other fuel <br /> additives,including 1,2-DCA and EDB were detected at or above laboratory reporting limits <br /> in the ground water samples analyzed A map illustrating the approximate extent of TPH-d- <br /> and MTBE-impacted ground water is depicted on Figure 4 <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of this investigation, AGE recommends the site be considered for closure <br /> Advanced GeoEnvvonmental Inc <br /> I <br />