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i i01 February 2006 • AGE-NC Project No 00-0697 Page 3 of 4 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES I TPH- w - g as detected in the ground water sample collected from well MW 3 at a concentration of 3,000 micrograms per liter (µg/1) BTEX compounds were detected in the ground water sample collected from well MW-3 at the following concentrations 490 µg/1 benzene, 49 µg/l toluene, 53 µg/1 ethylbenzene, and 107 pg/l total xylenes, benzene was also detected in well MW-1 at a concentration of 19 µg/l MTBE was detected in sample MW-4 at a concentration of 5 9 �Lg/l TAME and 1,2-DCA were detected in sample MW-3 at concentrations of 17 pg/1 and 6 7 µg11, respectively 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 16 November 2005 are summarized in Table 2,the estimated extent of dissolved petroleum hydrocarbon contamination is illustrated on Figure 4 The laboratory report (CTEL Project No CT214-0511106), quality assurance/quality control (QA/QC) report, and chain of custody form are included in Appendix C Documents confirming the upload of both third and fourth quarter 2005 laboratory electronic deliverable format (EDF) files and depth to water measurements to GeoTracker are included in • Appendix D 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes • On 16 November 2005,depths to ground water ranged from 5 02 feet to 6 35 feet below the tops of the well casings Ground water elevation at the site ranged from 17 78 feet to 18 15 feet below MSL, and averaged approximately 18 02 feet below MSL, indicating a decrease in ground water elevation of approximately 0 45 feet since the last monitoring event Ein August 2005 • Ground water at the site was inferred to be flowing toward the west-northwest under a hydraulic gradient of approximately 0 007 ft/ft • TPH-g was detected in the ground water sample collected from well MW-3 at a concentration of 3,000 µg/1 BTEX compounds were detected in the ground water sample collected from well MW-3 at the following concentrations 490 µg/1 benzene, 49 pg/l toluene, 53 µg/1 ethylbenzene,and 107 pg/l total xylenes, benzene was also detected in well MW-1 at a concentration of 19µg/l MTBE was detected in sample MW-4 at a concentration of 5 9[g/l TAME and 1,2-DCA were detected in sample MW-3 at concentrations of 17 pg/1 • and 6 7 µg11, respectively Advancer!GeoEnwronmental,Inc I