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t s f ' 27 July 2005 AGE-NC Project No 01-0877 ' Page 3 of 4 ' MW-3 and,210,000 [tg/l toluene,26,000 gg/1 ethylbenzene,and 124,000 [ig/l total xylenes all from well MW-1 1,2-DCA was detected in the water samples collected'from wells MW-1 through MW-3 at a maximum concentration of 29 µg/1 (MW-2) and EDB was detected in the all water samples collected, well MW-1 had the maximum concentration of 130 µg/1 No other target analytes were ' detected at or above laboratory reporting limits in the ground water samples analyzed Concentration maps depicting the approximate distribution of dissolved TPH-g and benzene are ' presented in Figures 4 and 5, respectively The analytical results of ground water samples collected on 26 March 2005 are summarized in Table 2 The laboratory report (CTEL Protect No CT214- 0501152),quality assurance/quality control(QA/QC)report,and chain of custody forms are Included ' In Appendix C Documents confirming the upload of aboratory electronic deliverable format(EDF) files and depth to water measurements to GeoTracker are included in Appendix D ' 4.0. SUMMARY AND CONCLUSIONS The following conclusions were drawn from the results of this Investigation • During the January 2005 monitoring event,the average ground water elevation at the site was 17 40 feet below MSL The ground water table forms a shallow northeast trending plunging- ridge, with a net ground water flow toward the northeast under a gradient of approximately ' 0 004 foot/foot • High concentrations of TPH-g and BTEX compounds were detected in all water samples collected during the first quarter 2005 with a maximum concentration of TPH-g at 580,000 ' µg/1 (MW-1) and Benzene at 300,000 µg/1 (MW-3) In addition, EDB was detected in all four wells at a maximum concentration of 130 gg/l (MW-1), and 1,2-DCA was detected In the ground water samples collected from wells MW-1 through MW-3 at a maximum concentration of 29 pg/1 (MW-1) • The fuel additives MTBE, TAME, TBA, DIPE and ETBE were not detected this quarter in any of the ground water samples • The highest concentrations of contaminants were detected near the area of wells MW-1 and MW-3 These locations correspond to the location of the former UST 43,one of the possible mayor release point(s) of the UST system Advanced GeoEnvironmental,Inc