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' 01 February 2005 <br /> • AGE-NC Project No 98-0497 <br /> Page 3 of 4 <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> The analytical results from the September 2004 ground water monitoring event are as follows <br />' • TPH-g was detected in well MW-1 at a concentration of 7,900 micrograms per liter(µg/1) <br /> The laboratory report noted that the detected concentration was mostly in the diesel range <br /> ' • TPH-d was detected in MW-1 at a concentration of 69,000 µg/1 <br /> • BTEX compounds and MTBE were not detected in the five ground water samples analyzed <br /> Laboratory results of the water samples analyzed are summarized in Tables 2 and 3 Copies of the <br /> ' laboratory report(CTEL Project No CT214-0409196), quality assurance/duality control (QA/QC) <br /> report, and Cham-of-custody forms are provided in Appendix B Documents confirming the upload <br /> of laboratory electronic deliverable format (EDF) files and depth to water measurements to <br /> ' GeoTracker are provided in Appendix C <br /> r <br /> ' • 4.0. SUMMARY AND CONCLUSIONS <br /> The findings of the September 2004 ground water monitoring event include the following <br /> ' The average calculated ground water elevation was approximately 44 06 feet below MSL, <br /> and was within the screened interval of each monitoring well Ground water flow direction <br /> ' near the former UST location was to the northeast under a gradient of approximately <br /> 0 008 ft/ft Historically,the flow direction and gradient have been similar to those calculated <br /> for this quarter <br /> ' TPH-g and TPH-d were detected in the ground water sample collected and analyzed from <br /> monitoring well MW-1 The detected concentrations of TPH-d in samples collected from <br /> ' MW-1 have fluctuated significantly during the past ten monitoring events <br /> • No analytes of concern were detected in the ground water samples collected from wells <br /> MW-2 through MW-5 <br /> • The hydrocarbon-impacted ground water plume appears to be limited to the former UST area <br /> immediately surrounding well MW-1 The inferred areal extent of hydrocarbon-impacted <br /> ' ground water is illustrated on Figure 4 <br /> ' Advanced GeoEnvironmental,Inc <br /> t <br />