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' 08 July 2004 AGE-NC Project No. 97-0343 ' Page 3 of 4 ' 3.2. ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g and TPH-d were detected in the ground water sample collected from well MW-1 at ' concentrations of 1,900 micrograms per liter(gg/1)and 25,000 pg/l,respectively.BTEX compounds were detected in the same sample at concentrations of 24 pg/l benzene, 1,300 pg/1 toluene, 750 µg/l ethylbenzene and 4,100 pg/1 total xylenes. TPH-g, TPH-d and BTEX were not detected at or above laboratory reporting limits,with the exception of xylenes in the sample collected from well MW-3, in the ground water samples collected from wells MW-3, MW-4, MW-5, MW-7 and MW-8. ' 1,2-DCA was detected in the ground water samples collected from wells MW-3 and MW-4 at concentrations of 6.4 gg/1 and 2.5 gg/l, respectively. No other fuel additives were detected at or above laboratory reporting limits in the ground water samples collected from the site. The analytical results of the water sample collected in March 2004 is summarized on Table 2. The laboratory report (CTEL Lab Project No. CT214-0403149), QA/QC report and chain-of-custody ' form are included in Appendix C. 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE finds: • At the time of the March 2004 sampling event, depths to ground water in wells MW-1 through MW-5,MW-7 and MW-8 ranged from 53.40 feet to 54.47 feet below the well heads; ground water elevations ranged from 25.74 feet below mean sea level(MSL) in well MW-1 to 26.21 feet below MSL in well MW-7(Table 2). The average ground water elevation at the ' site this quarter was 26.00 feet below MSL. The average ground water elevation at the site increased 4.86 feet between the August 2003 and March 2004 sampling events. • Based on the elevation contours,the ground water flow direction was inferred to be flowing ' generally to the south at an average hydraulic gradient of 0.01 feet/feet. Figure 3 illustrates the contoured ground water elevations as measured on 18 March 2004. ' • TPH-g and TPH-d were detected in the ground water sample collected from well MW-1 at concentrations of 1,900gg/l and 25,000 pg/l,respectively. BTEX compounds were detected in the same sample at concentrations of 24 pg/l benzene, 1,300 gg/l. toluene, 750 gg/1 ethylbenzene and 4,100 gg/l total xylenes. TPH-g, TPH-d and BTEX were not detected at or above laboratory reporting limits, with the exception of xylenes in the sample collected from well MW-3, in the ground water samples collected from wells MW-3,MW-4, MW-5, IMW-7 and MW-8. • ' Advanced GeoEnvironmental,Inc.