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f <br />' 16 June 2004 <br /> AGE-NC Project No 95-0173 <br />' Page 5 of 9 <br />' 4.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br />' 08 November 2003, the contaminant impact to ground water was quantified from the laboratory <br /> analysis <br />' From field and laboratory data collected at the SVE remediation system between 09 September and <br /> 30 December 2003, AGE determined the average TPH-g concentration, the average flow rate and <br /> calculated the approximate mass and volume of hydrocarbons removed <br /> 1 <br /> 4 1 GROUND WATER ELEVATION AND GRADIENT <br />' During the November 2003 ground water monitoring event,depths to ground water ranged between <br /> 30 78 and 33 57 feet below the tops of well casings, ground water elevations were calculated to be <br /> between 22 16 feet (MW-8) and 23 48 feet (MW-11) below mean sea level Generally, the ground <br /> water elevation at the site decreased an average 0 44 feet between the September 2003 and the <br />' December 2003 ground water monitoring events <br /> The ground water elevation data for the November 2003 ground water monitoring event is depicted <br />' in Figure 3 Ground water flow direction at the site was inferred to be onented northeast across the <br /> site, at approximate gradients of 0 004 to 0 005 ft/ft, or approximately 26 feet per mile <br /> 4 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br />' A total of eighteen ground water samples were submitted to CTEL for analysis TPH-g was detected <br /> from seven ground water samples collected from wells MW-2 through MW-4,AW-1 (A and B)and <br /> AW-2 (A and B) at concentrations as high as 31,000 micrograms per liter(µg/1) in the sample from <br /> AW-2B <br /> Various BTEX constituents were detected from 10 ground water samples collected from wells <br /> MW-2 through MW-4,MW-13 (A-C), AW-1 (A and B) and AW-2 (A and B) at concentrations as <br /> high as 17,600 µg/l (xylene, AW-2A) The maximum benzene concentration was detected from <br /> sample AW-2B at a concentration of 1,900 µg/1 <br /> 1,2-DCA was detected in water samples collected from wells AW-1 B and AW-2B at concentrations <br /> of 3 3 µg/1 and 4 8 µg11. respectively No other fuel components were detected in the samples <br /> analyzed Previous and current analytical results of ground water monitoring well samples are <br /> IAdvanced GeoEnviron mental,Inc <br />