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I10 January 2001 AGE-NC Project No 96-0263 Page 2 of 4 water sample was transferred into three 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative After collection, the samples were properly labeled, placed in a chilled container and transported under chain-of-custody to McCampbell Analytical Inc (MM) The samples were analyzed for the following • Total petroleum hydrocarbons quantified as gasoline (TPH-g) In accordance with EPA Method 5030/8015 Modified, • Volatile aromatic hydrocarbons -benzene, toluene, ethylbenzene and total xylenes (BTEX) with methyl tertiary-butyl ether(MTBE) In accordance with EPA Method 8020, and • Oxygenated compounds - di-isopropyl ether (RIPE), ethyl tertiary-butyl ether (ETBE), methyl tertiary-butyl ether(MTBE), tertiary-amyl methyl ether(TAME) and tertiary butanol (TBA) In accordance with 8260-Modified, respectively I . 3.0. FINDINGS Ground water elevation flow direction and gradient were determined from field data collected on 08 December 2000, the contaminant impact to ground water was quantified from the laboratory analytical data I3 1 GROUND WATER GRADIENT AND FLOW DIRECTION I The elevation of ground water In each well was calculated by subtracting the depth to ground water from the surveyed well casing elevations (Table 1) For the December 2000 sampling event, depths to ground water ranged from 6 93 feet to 7 98 feet below the tops of the well casings Ground water elevations at the site ranged from 29 18 feet in well MW-8 to 29 62 In well MW1 The ground water flow direction was determined by contouring the ground water elevation data The ground water at the site was Inferred to be flowing to the north at an average gradient of 0 004 feet/feet or 21 feet per mile The ground water contours are depicted on Figure 3 I32 LABORATORY RESULTS OF GROUND WATER SAMPLES ITPH-g was detected in the water samples collected from monitoring wells MW-2, MW-4, MW-5, • MW-7'and MW-8 at concentrations ranging from 53 micrograms per liter(kig/l) in MW-8 to 21,000 ,ugll In MW-7 I Advanced GeoEnvironmental,Inc