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i <br /> 10 August 2006 <br /> • AGE-NC Project No 95-0497 <br />' Page 3 of 4 <br />' 3.0. FINDINGS <br /> Ground water elevation and flow direction were Inferred from field data Hydrocarbon-impact to <br /> iground water was assessed by laboratory analysis of the ground water samples <br />' 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> At the time of the May sampling event, depths to ground water at the site ranged from 6160 feet <br />' (MW-5)to 63 01 feet(MW-4)below the tops of the well casings Ground water elevation at the site <br /> averaged approximately 37 42 feet below mean sea level (MSL), indicating an average Increase in <br /> ground water elevations of 3 67 feet since the last monitoring event in February 2006 Ground water <br /> elevation data is included in Table 1 <br /> Ground water flow direction was calculated from the ground water elevation data The ground water <br /> ' was Inferred to be flowing west-southwest at an approximate hydraulic gradient of 0 001 ft/ft <br /> Figure 3 illustrates the contoured ground water elevations as measured on 31 May 2006 <br /> i • <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> The analytical results from the May 2006 ground water monitoring event are as follows <br /> i • TPH-g was detected In well MW-I at a concentration of 11,000 micrograms per liter(�Lgll) <br /> The laboratory report noted that the detected concentration was mostly in the diesel range <br /> • TPH-d was detected in well MW-1 at a concentration of 60,000 µg/l <br /> • BTEX compounds MTBE were not detected in the five ground water samples analyzed <br /> Laboratory results of the submitted water samples are summarized in Table 2 The Inferred areal <br /> extent of hydrocarbon-impacted ground water is illustrated on Figure 4 Copies of the laboratory <br /> ' report(CTEL Project No CT214-0606005),quality assurance/quality control(QA/QC)reports,and <br /> chain of custody form are provided in Appendix E GeoTracker confirmation pages of the submitted <br /> laboratory electronic deliverable format (EDF) files are included in Appendix D <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> The findings of the May 2006 ground water monitoring event Include the following <br /> Advanced GeoEnvironmental,Inc <br />