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19 February 2001 <br /> ' AGE-NC Project No 98-0465 <br /> Page 2 of 4 <br /> ' 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative After <br /> collection, the samples were properly labeled, placed in a chilled container and transported under <br /> chain-of-custody to McCampbell Analytical, Inc (MAI) for analysis The samples were analyzed <br /> ' for the following <br /> ' o Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) In <br /> accordance with EPA Methods 503018015-Modified and 3550/8015 M, respectively <br /> o Volatile aromatic compounds - benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> ' methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8020, and <br /> O Fuel oxygenates - MTBE, dl-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> ' tertiary-amyl methyl ether (TAME), and tertiary butanol (TBA) in accordance with EPA <br /> Method 8260 <br /> 3.0. FINDINGS <br /> I GS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> 18 January 2001, the contaminant impact to ground water was assessed from the laboratory <br /> analytical data <br /> t3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the January 2001 sampling event, depths to ground water ranged from 10 22 feet to <br /> 11 25 feet below the tops of the well casings Relative ground water elevations at the site ranged <br /> from 7 48 feet below mean sea level (MSL) in well MW4 to 7 61 feet below MSL in well MW2 <br /> (Table 1) During this monitoring event, the ground water level in the wells was approximately 5 22 <br /> to 6 25 feet below the tops of the well screens, indicating that the wells are screened properly and <br /> yield representative ground water samples The relative ground water elevation at the site increased <br /> an average of 1 12 feet between the October 2000 and January 2001 monitoring events <br /> ' Ground water is flowing toward the northwest at an averse adient of 0 0018 feet/feet Figure 3 <br /> g �' g <br /> illustrates the contoured ground water elevations as measured on 18 January 2001 <br /> Advanced GeoEnvironmental,Inc <br />