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27 November 2000 <br /> AGE-NC Project No 97-0343 <br /> IPage 2 of 4 <br /> I • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Methods 5030/8015 Modified and 3550/8015 Modified, respectively, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method <br /> 60218020, and <br /> • Fuel oxygenates methyl tertiary-butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl <br /> tertiary-butyl ether(ETRE), tertiary-amyl methyl ether(TAME) and tertiary butanol (TBA) <br /> in accordance with EPA Method 8260 Modified <br /> I <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 25 October 2000, the contaminant impact to ground water was assessed from the laboratory <br /> analytical data <br /> i3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the October 2000 sampling event, depths to ground water ranged from 48 81 feet to <br /> 49 25 feet below the well heads Ground water elevations at the site ranged from 23 38 feet below <br /> mean sea level (MSL) in well MW 1 to 23 45 feet below MSL in well MW3 (Table 1) Ground water <br /> elevations at the site decreased an average of 4 88 feet since the July 2000 monitoring event During <br /> this monitoring event, the depths to ground water in the wells were approximately 13 81 to 14 25 <br /> feet below the tops of the well screens, indicating that the wells are screened properly and yield <br /> representative shallow ground water samples <br /> The ground water was uiferred to be flowing to thenort!t a hydraulic gradient of 0 0035 <br /> feet/feet Figure 3 illustrates the contoured ground wa e levaions as measured on 25 October 2000 <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in all three ground water samples at concentrations ranging from 600�tg/l in <br /> MW3 to 3,800 µg/1 in MW2 TPH-d was detected in ground water samples collected from <br /> monitoring wells MWl and MW3 at concentrations of 770 µg/1 and 130 µg/1, respectively The <br /> ground water sample collected from MW2 was not analyzed for TPH-d as the sample container <br /> broke in transit to the laboratory <br /> i <br /> I <br /> Advanced Geo Environmental,Inc <br /> I <br />