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' 31 May 2005 AGE-NC Project No 04-1239 Page 5 of 7 ' analyzed Analytical results of soil samples are summarized in Table 2 The laboratory report(CTEL Project No CT214-0504013), quality assurance and quality control (QA/QC) report, and chain of custody forms are included in Appendix F 3 3 GROUND WATER GRADIENT AND FLOW DIRECTION At the time of the April 2005 sampling event, depths to ground water ranged from 18 46 feet (MW-9) to 18 71 feet (MW-11) below the tops of the well casings Ground water elevation at the ' site ranged from 7 89 feet(MW-10)to 8 34 feet(MW-9)below mean sea level(MSL),and averaged approximately 8 13 feet below MSL(Table 1) During this monitoring event,the ground water levels in all three wells were as high as 1 54 feet above the tops of the well screens However, during the ' purge cycle, the depth to water was reduced to a level within the well screens, thus recharging the wells with water from the screen area exposed to the surrounding sediments and water-bearing layers Ground water at the site was inferredn w to be flowing toward the northeast under a hydraulic gradient � . of approximately 0 01 foot/foot(ft/ft) Figure 6 illustrates the contoured ground water elevations as measured on 11 April 2005 34 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g was detected in well MW-9 at a concentration of 62,000 micrograms per liter (µg/1) BTEX compounds were detected in well MW-9 at the following concentrations 13 µg11 benzene, 3,100 µg/1 toluene, 1,800 µg/1 ethylbenzene, and 7,900 µg11 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 11 April 2005 are summarized in Table 3 The laboratory report(CTEL Project No CT214-0504101),QA/QC report, and chain of custody form are included in Appendix G 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes • In general, silty clay, clayey silt, and sandy silt were encountered from surface grade to between 20 feet and 25 feet bsg From approximately 25 feet bsg to the total depth of the Advanced GeoEnnronmental,Inc