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' 14 March 2005 • AGE-NC Project No 03-1070 ' Page 3 of 4 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g was detected in ground water samples collected from the wells at a maximum concentration ' of 36,000 micrograms per liter(µg/1)in well MW-2 One or more BTEX compounds were detected in ground water samples collected from wells MW-1 through MW-4 at maximum concentrations of 5,900 pg/1 benzene, 350 pg/I ethylbenzene and 1,510 pg/l total xylenes in well MW-3, and 1,400 pg/l toluene in well MW-2 h Three fuel additives were detected in the analyzed samples MTBE was detected in ground water ' samples collected from wells MW-1 through MW-3 at a maximum concentration of 18,000 µg11 (MW-2), 1,2-DCA was detected in ground water samples MW-2 and MW-3 at concentrations of 12 µg/1 and 62 µg11, respectively, and TAME was detected in ground water samples MW-2 and ' MW-3 at concentrations of 34 µg/1 and 28 µg11 No other analytes were detected at or above laboratory detection limits in the ground water samples analyzed The analytical results of the ground water samples collected on 17 November 2004 are summarized in Table 2 A plane view map depicting the lateral extent of petroleum hydrocarbon contamination is illustrated on Figure 4 The laboratory report(CTEL ProjectNo CT214-0411132), ' quality assurance/quality control (QA/QC) reports and chairs of custody form are included in Appendix C Confirmation pages of the submitted laboratory electronic digital format(EDF) files and depth to water measurements are included in Appendix D I ' 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes ' • The ground water elevations ranged from 20 85 to 2101 feet below MSL Net ground water flow was inferred to be flowing toward the south, away from the former UST area at an average gradient of 0 002 ft/ft • TPH-g and BTEX compounds were detected in ground water samples collected from wells . MW-1 through MW-4 The BTEX compounds benzene and toluene are present at ' concentrations that exceed the DHS' Maximum Contaminant Level (MCL) for these compounds in drinking water ' • The fuel additives MTBE, 1,2-DCA and TAME were detected, MTBE in wells MW-1 through MW-3, 1,2-DCA in wells MW-2 and MW-3, and TAME in wells MW-1 through MW-4 MTBE and 1,2-DCA are present at concentrations that exceed the DHS' MCL for ' these compounds in drinking water • Petroleum hydrocarbon-impact to groundwater is not defined in any direction However,the ' Advanced GeoEnvironmental,Inc