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r <br />' 24 November 2004 <br /> • AGE-NC Project No 03-1070 <br /> Page 3 of 4 <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected In ground water samples collected from the wells at a maximum concentration <br />' of 21,000 micrograms per liter (µg/1) In well MW-3 BTEX compounds were detected in ground <br /> water samples collected from wells MW-1 through MW-4 at maximum concentrations of 4,900µg/l <br /> benzene(MW-3), 1,200 µg/1 toluene(MW-2), 370 µg/1 ethylbenzene (MW-3) and 1,290 µg/1 total <br /> xylenes (MW-2), respectively <br /> MTBE was detected In ground water samples collected from wells MW-1 through MW-3 at a <br /> maximum concentration of 14,000 µg/1 in sample MW-2 1,2-DCA was detected In ground water <br /> sample collected from well MW-3 at a concentration of 13 µg/1 TAME was detected in ground <br /> water samples collected from wells MW-2 and MW-3 at a maximum concentration of 85 µg/1 in well <br />' MW-2 <br /> No other analytes were detected at or above laboratory detection limits In the ground water samples <br />' analyzed The analytical results of the ground water samples collected on 28 June 2004 are <br /> summarized In Table 2 A plane view map depicting the lateral extent of petroleum hydrocarbon <br /> • contaminatlon Is illustrated on Figure 4 The laboratory report(CTEL Project No CT214-0406255), <br />' quality assurance/quality control (QA/QC) reports and chain of custody form are included in <br /> Appendix C <br /> r � <br /> 4.0. SUMMARY AND CONCLUSIONS <br />' Based on the data collected from the site, AGE concludes <br />' The ground water elevations ranged from 18 41 feet to 18 70 feet below MSL Ground water <br /> flow was Inferred to be flowing toward the southeast, away from the former UST area at an <br /> average gradient of 0 005 ft/ft <br />' • TPH-g and BTEX compounds were detected In ground water samples collected from wells <br /> MW-1 through MW-4 at maximum concentrations of 21,000 µg/1 TPH-g, 4,900 µg/1 <br />' benzene, 1,200 gg/l toluene, 370 µg/1 ethylbenzene and 1,290 µg/1 xylenes <br /> • MTBE was detected in ground water samples collected from wells MW-1 through MW-3 <br /> at a maximum concentration of 14,000 µg/1 <br /> r • 1,2-DCA was detected In the ground water sample collected from well MW-3 at a <br /> concentration of 13 µg11 TAME was detected In the ground water samples collected from <br />' wells MW-2 and MW-3 at a maximum concentration of 85 µg11 In well MW-2 <br /> . • Petroleum hydrocarbon impact to ground water Is not defined in any direction <br /> Advanced GeoEnvironmental,Inc <br />