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10 December 2004 <br /> • AGE-NC Project No 02-0950 <br /> Page 5 of 4 <br /> I3 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 55,000 micrograms per liter(µg/l) and 9,200 µg/l, respectively <br /> BTEX components were detected in the water sample collected from well MW-2 at concentrations <br /> of 98 gg/l benzene, 130µg/l toluene, 1,500µg11 ethylbenzene,and 4,860µg/1 xylenes 1,2-DCA was <br /> detected in MW-2 at a concentration of 5 6 µg11 <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 CT214-0409195), 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 /> 4.0, SUMMARY AND CONCLUSIONS <br /> Based on the data collected from the site, AGE concludes <br /> • TPH-g and TPH-d were detected in sample MW-2, the respective concentrations increased <br /> significantly compared with the previous quarter, TPH-d was detected for the second <br /> consecutive monitoring event <br /> • BTEX compounds were detected in the water samples collected from well MW-2 The <br /> concentrations of benzene and toluene were at lower levels than the previous quarter,but the <br /> concentrations ethylbenzene and total xylenes were higher The concentrations of BTEX <br /> detected in MW-2 were all above each constituent's respective DHS maximum contaminant <br /> I level (MCL) <br /> • Ground water contamination appears to be defined toward the northeast and west of the <br /> current upgradient location, but not in any other direction <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of the environmental activities recounted in this report, AGE recommends <br /> 10 Continuation of the quarterly monitoring program, the next monitoring event should be <br /> performed during the fourth quarter 2004, and <br /> Advanced GeoEnvironmental,Inc <br />