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t 1 1 18 November 2005 AGE-NC Project No 03-1100 " ' Page 3 of 4 MW-7 to 22 67 feet below MSL in wells MW-1 and MW-2 (Table 1) The ground water elevation ' at the site increased an average of 1 89 feet between the February 2005 and May 2005 monitoring events , ' The ground water flow direction was inferred to be flowing towards the east/southeast in the former UST location at a calculated hydraulic gradient of 0 005 foot per foot(ft/ft) Figure 3 illustrates the ' contoured ground water elevations as measured on 12 May 2005 ' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g was detected In the ground water sample collected from well MW-2 at a concentration of ' 190,000 micrograms per liter (µg11) BTEX compounds were detected in the ground water sample collected from well MW-2 at a concentration of 3,000 µg11 (benzene), 12,000 pg/l (toluene), 3,400 pg/l (ethylbenzene), and 17,500 pg/1 (total xylenes) ' 1,2-DCA was detected In ground water samples collected from wells MW-2 and MW-3 at concentrations of 84 µg/1 and 8 6 pg/l, respectively EDB was detected 1n the ground water sample collected from well MW-2 at a concentration of 8 3 pg/1 No other constituents of concern were detected in the ground water analyses at or above laboratory detection limits Analytical results of water samples collected in May 2005 are summarized in Table 2 The laboratory report (CTEL Project No CT214-0505122), quality assurance/quality control (QA/QC) report, and chain of custody form are included in Appendix B GeoTracker - confirmation pages of the submitted ground water monitoring electronic deliverable format(EDF) files are included in Appendix C 4.0.} SUMMARY AND CONCLUSIONS Based on the findings from this investigation, AGE concludes The ground water elevation on-site ranged from 22 10 to 22 67 feet below MSL Ground Tµ water flow was inferred to be flowing inward towards the east/southeast In the former UST location under a gradient of 0 005 ft/ft y • TPH-g was detected in the ground' water sample collected from well MW,2 at a' concentration of 190,000 µg11 • 1,2-DCA was detected In ground water samples collected from wells MW-2 and MW-3 at • concentrations of 84 pg/1 and 8 6 pg/1, respectively Advanced GcoEnvironmental,Inc