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r e 9 ^ 05 March 2002 AGE-NC Project No 99-0592 ' Page 2 of 4 into laboratory-supplied 40-m1 EPA-approved VOA vials containing 0 5 ml 18%hydrochloric acid I as a sample preservative and into one 1-liter amber bottle without a sample preservative The sample containers were then labeled with well designation,date,time of sampling and the sampler's initials The samples were transported in a chilled container under chain-of-custody to McCampbell Analytical, Inc (MAI), a Califorrua Department of Health Services(DHS)-certified laboratory, for analysis The samples were analyzed for ' Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in accordance with EPA Method 8015 modified, ' Benzene,toluene, ethylbenzene and total xylenes(BTEX) and the oxygenated ether methyl tertiary butyl ether(MTBE) in accordance with EPA Method 8020, and • Volatile organic compounds and fuel oxygenates -MTBE,di-Isoproply ether(DIPE), ethyl ' tertiary butyl ether (ETBE), tertiarty amyl methyl ether (TAME), tertiary butanol (TBA), methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in ' accordance with EPA Method 8260 modified 3.0. FINDINGS Ground water elevation, flow direction, and gradient were determined from field data collected on ' 11 February 2002 Laboratory analysis of ground water samples was used to quantify the impact to ground water ' 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION IDepth to ground water was measured between 57 92 feet and 58 60 feet bsg in wells MW-1,MW-2, MW-3 and MW-4 on 11 February 2002 Ground water elevations at the site ranged from 30 81 feet ' below mean sea level (msl) in well MW-1 to 3160 feet below msl in well MW-4 Momtoring data from the site was combined with monitoring well data collected from the adjacent former Cherokee Truck Stop site (3535 East Cherokee Road) also collected on I 1 February 2002, to determine the ' approximate ground water flow direction Ground water elevation data are presented on Table 1 Ground water flow direction was Inferred to be toward the east-northeast at a very low gradient of approximately 0 001 ft/ft Figure 3 depicts the contours for February 2002 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES I. The ground water sample collected from MW-1 contained TPH-g and TPH-d at concentrations of 470 micrograms per liter(µg/1)and 140 µg/1,respectively Benzene,toluene and total xylenes were Advanced GeoEnvironmental,Inc I