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' 14 July 2005 AGE-NC Project No 00-0696 Page 3 of 4 During this monitoring event, the ground water levels in well MW-4 was at the top of the well screen The wells should yield accurate data representative of shallow ground water conditions because during the purge cycle,the depth to water was reduced to a level within the well screen,thus recharging the well with water from the screen area exposed to the surrounding sediments and water- bearing layers I Ground water at the site was inferred to be flowing in a north-northeast plunging trough under hydraulic gradients of approximately 0 004 foot/foot(ft/ft)or less Figure 3 illustrates the contoured ground water elevations as measured on 27 May 2005 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' TPH-g was detected in the ground water sample collected from well MW-3 at a concentration of 2,900 micrograms per liter (µg/1) BTEX compounds were detected in the ground water sample collected from well MW-3 at the following concentrations 70 µg/1 benzene, 140 µg/1 toluene, 150 µg/1 ethylbenzene, and 338 µg/1 total xylenes • 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 27 May 2005 are summarized in Table 2 The laboratory report (CTEL Project No CT214-0505273), quality assurance/quality control (QA/QC) report, and chain of custody form are included in Appendix D Documents confirming the upload of laboratory electronic deliverable format(EDF)files and depth to water measurements to GeoTracker are included in Appendix E 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes IOn 27 May 2005, depths to ground water ranged from 4 92 feet to 5 93 feet below the tops of the well casings Ground water elevation at the site ranged from 17 68 feet to 17 81 feet below MSL, and averaged approximately 17 73 feet below MSL, indicating a decrease in ground water elevation of approximately 0 92 feet since the last monitoring event in February 2004 • Ground water at the site was inferred to be flowing in a north-northeast plunging trough under hydraulic gradients of approximately 0 004 ft/ft or less ITPH-g was detected in the ground water sample collected from well MW-3 at a concentration of 2,900 µg/l BTEX compounds were detected in the ground water sample Advanced GeoEnvironmental,Inc