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' 14 March 2005 <br /> . AGE-NC Project No 02-0950 <br />' Page 3 of 4 <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g and TPH-d were detected in the water sample collected from well MW-2 at concentrations <br /> of 60,000 micrograms per liter (µg/1) and 9,800 pg/l, respectively <br /> BTEX components were detected in the water sample collected from well MW-2 at concentrations <br /> of 160 µg/1 benzene, 210 gg/l toluene, 1,400 gg/1 ethylbenzene, and 3,930 µg/1 xylenes <br /> No other analytes were detected at or above laboratory reporting limits in the ground water samples <br />' analyzed The analytical results of the ground water samples are summarized in Table 2 The <br /> laboratory report(CTEL Project No CT214-0412172), quality assurance/quality control (QA/QC) <br /> report, and chain of custody form are included in Appendix C Documents confirming the upload <br /> of laboratory electronic deliverable format (EDF) files and depth to water measurements to <br /> GeoTracker are included in Appendix D <br /> 1 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> lie Based on the data collected from the site, AGE concludes <br /> • At the time of the December 2004 sampling event, depths to ground water ranged from <br /> 20 00 feet to 20 30 feet below the tops of the well casings Ground water elevation at the site <br /> averaged approximately 12 35 feet below MSL, Indicating an increase in ground water <br /> elevation of approximately 0 57 feet between September and December 2004 Ground water <br /> was Inferred to be flowing toward the north-northeast under a hydraulic gradient of <br /> approximately 0 005 ft/ft <br />' • TPH-g and TPH-d were detected in sample MW-2, the respective concentrations slightly <br /> Increased compared with the previous quarter <br />' • BTEX compounds were detected In the water samples collected from well MW-2 The <br /> concentrations of benzene and toluene were slightly higher than the previous quarter, the <br /> concentrations ethylbenzene and total xylenes were slightly lower The concentrations of <br />' BTEX detected In MW-2 were all above each constituent's respective DHS maximum <br /> contaminant level (MCL) <br /> • Ground water contamination appears to be defined toward the northeast and west of the <br /> current up-gradient location, but not in any other direction <br />' Advanced GeoEnvtronmental,Inc <br />