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i <br /> 08 February 2005 <br /> . AGE-NC Project No 00-0764 <br /> Page 3 of 4 <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> Depths to ground water ranged from 32 13 to 32 45 feet below the tops of the well casings <br /> Ground water was within the screened Intervals of wells MW-1 through MW-4, which should <br /> yield samples fully representative of shallow ground water conditions, well MW-5 Is screened at <br /> approximately 32 feet below the water table and should yield water samples representative of <br /> deeper ground water conditions <br /> The elevation of ground water In each well was calculated by subtracting the ground water depth <br /> ' from the surveyed casing elevation Ground water elevations in the shallow wells ranged from <br /> 20 26 feet(MW-1) to 2125 feet(MW-2) below mean sea level (MSL) The relative ground water <br /> elevation data Is summarized in Table 1 <br /> Ground water flow direction in the area of the former USTs was Inferred to be toward the <br /> northeast at a gradient of approximately 0 033 foot/foot(ft/ft), as depicted on Figure 3 <br /> 32 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in ground water sample MW-3 at a concentration of 250 micrograms per <br /> liter(µg/1) <br /> ' IPE and 1,2-DCA were detected in sample MW-4 at concentrations of 3 9 1 and 3 S 1, <br /> D p µlb µti <br /> ' respectively <br /> No other analytes of concern were detected in the ground water samples Laboratory results of <br /> the analyzed samples are summarized in Table 2 The laboratory report (CTEL Project No <br /> CT214-0310121), quality assurance and quality control (QA/QC) report, and chain of custody <br /> forms are Included in Appendix D Current and historical documents confirming the upload of <br /> ' laboratory electronic deliverable format(EDF) files and depth to water measurements to <br /> GeoTracker are included In Appendix E <br /> I4.0. SUMMARY AND CONCLUSIONS <br /> ' Based upon the results of this quarterly monitoring event, AGE concludes <br /> • Ground water flow direction was Inferred to be toward the northeast In the former UST <br /> location, at a gradient of approximately 0 033 ft/ft <br /> i <br /> Advanced GeoEnvironmental,Inc <br /> I <br />