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1 <br />' 29 March 2001 <br /> • AGE-NC Project No 97-0249 <br />' Page 3 of 6 <br />' 3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br />' 09 March 2001, the contaminant impact to ground water was assessed from the ground water <br /> laboratory data <br /> I3 1 GROUND WATER ELEVATION AND GRADIENT <br />' The depths to ground water In wells MW-1 through MW-6 vaned from 7 03 to 10 26 feet below the <br /> tops of well casings, ground water elevations were calculated to be between 0 26 feet and 0 59 feet <br /> below mean sea level Ground water elevation at the site increased an average 198 feet between the <br />' December 2000 and the March 2001 ground water monitoring events, increasing ground water <br /> elevations have been observed at the site since the August 2000 ground water monitoring event The <br /> ground water elevation data for MW-1 through MW-6 during the March 2001 ground water <br /> Imonitoring event is depicted in Figure 3 <br />' Ground water monitoring data collected at Three B's Truck Plaza wells MW-1 through MW-6 and <br /> Flag City Chevron wells MW-7, MW-12A and MW-13A indicated a ground water flow direction <br /> generally toward the east at a gradient of 0 003 ft/ft or less,or approximately 16 feet or less per mile <br /> I (Figure 3) <br /> 3 2 LABORATORY RESULTS OF MONITORING WELL GROUND WATER SAMPLES <br /> A total of six ground water samples were submitted to a DHS-certified laboratory in March 2001 <br /> TPH-g was detected in water samples collected from wells MW-1,MW-2,MW-3,MW-5 and MW-6 <br /> at concentrations ranging between 160 and 20,000 micrograms per liter (ug/1), the laboratory <br /> reported each TPH-g chromatogram as having unmodified or weakly modified gasoline patterns <br /> TPH-d was detected in water samples collected from MW-1, MW-2, MW-3 and MW-6 at <br /> concentrations ranging between 200 and 1,500 4g11, however, the laboratory reported diesel in <br /> samples collected from MW-1,MW-2,MW-3 and MW-6 as having significant lighter range gasoline <br /> compounds, the laboratory reported the sample collected from MW-1 as having unmodified or <br /> weakly modified diesel, the laboratory reported the sample collected from MW-2 as having <br /> sigraficant diesel-range compounds and the sample collected from MW-6 as having sigmficant oil <br /> range compounds <br /> I BTEX compounds were detected in water samples collected from MW-1,MW-2,MW-3,MW-5 and <br /> MW-6 at concentrations as high as 4,100µg/1 (benzene, MW-3) <br /> Advanced GeoEnvironmental,Inc <br />