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28 August 2000 <br /> AGE-NC Project No. 95-0100 <br />' Page 2 of 3 <br />' samples were also collected from each on-site domestic well. Water was collected from domestic <br /> well DW-1 with a '/z-inch bailer while water was collected from the spigots on wells DW-2 and <br /> DW-3. <br />' Each water sample was transferred into three 40-m1 volatile organic analysis(VOA) vials containing <br /> 0.5 ml 18% HCI as a sample preservative. The samples were then labeled and placed in a chilled <br />' container for transport under chain-of-custody to McCampbell Analytical, Inc. (MAI), a California <br /> Department of Health Services (DHS)-certified analytical laboratory. Each sample was analyzed for- <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with.EPA <br /> method 8015-modified, <br /> • Volatile aromatic compounds- benzene, toluene, ethylbenzene and total xylenes (BTE&X) <br />' with methyl tertiary-butyl ether(MTBE) in accordance with EPA method 8020, <br /> • Oxygenated fuel additives - di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), <br /> MTBE, tertiary amyl methyl ether (TAME) and tertiary butyl alcohol (TBA) in accordance <br /> EPA method 8260-modified. <br /> 3.0. FINDINGS <br />' 3.1. GROUND WATER ELEVATION/FLOW DIRECTION AND GRADIENT <br />'. Depth to ground water at the site ranged from 45.28 to 46.09 feet as measured from the tops of the <br /> well casings (Table 1). The corresponding relative ground water elevations ranged from 69.97 feet <br /> to 70.36 feet above mean sea level (msl). The ground water elevation increased approximately 0.69 <br />' feet since the previous sampling event in May. The ground water flow direction this quarter was <br /> determined to be to the northwest with a hydraulic gradient of 0.003 feet/feet (Figure 3). <br /> 3.2. GROUND WATER ANALYTICAL RESULTS <br />' Samples collected from wells DW-1, DW-2, DW-3 and MW-2 did not contain TPH-g, BTE&X, <br /> MTBE or other fuel oxygenates during this sampling event. In addition, TPH-g and BTE&X were <br /> not detected in ground water samples collected from MW-1 and MW-3. <br /> MTBE was detected in both MW-1 and MW-3 by EPA method 8020 at 220 micrograms per liter <br />' <br /> (,ug/1)and 160,ugll, respectively. MTBE was confirmed in each sample by EPA method 8260m at <br /> concentrations of 310,ug/l and 150,ug/l, respectively. No other fuel oxygenates were detected in the <br /> • sarnples. <br /> Advanced GeoEnvironmental,Inc. <br />