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I <br /> y6 19 January 2001 <br />' AGE-NC Project No 98-0497 <br /> Page 2 of 4 <br />' 2 2 GROUND WATER SAMPLE COLLECTION <br />' Prior to the collection of ground water samples, the depth to ground water was re-measured in each <br /> well to ensure that a minimum of 80% of the initial water volume had recharged Water samples <br /> were then collected from each well using a clean, disposable plastic bailer The water was transferred <br />' into one 1-liter amber bottle and three chilled 40-rill volatile organic analysis(VOA)vials containing <br /> 0 5 nil hydrochloric acid (18%) as a sample preservative After collection, the samples were labeled <br /> and placed in a chilled container for transportation under chalri-of-custody to McCampbell <br />' Analytical Laboratories(MAI), a DHS-certified analytical laboratory Each sample was analyzed for <br /> the following <br />' 0 Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br />' 0 Volatile aromatic hydrocarbons - benzene, toluene, ethyl benzene and total xylene (BTEX) <br /> and methyl tertiary butyl ether (MTBE) in accordance with EPA Method 8020, <br /> • Oxygenated fuel additives -MTBE, tertiary butyl alcohol(TBA), di-isopropyl ether (DIPE), <br /> ethyl tertiary butyl ether (ETBE), tertiary amyl methyl. ether (TAME), methanol, and <br /> ethanolm accordance with EPA Method 8260 Modified, and <br />' 0 Ethylene dibrormde and 1,2-dichloroethane in accordance with EPA Method 8260 <br />' 3.0 FINDINGS <br /> Ground water elevation and flow direction were inferred from field data, hydrocarbon-impact to <br /> ground water and soil was assessed by laboratory analysis of the ground water samples <br />' 3 1 GROUND WATER ELEVATION AND GRADIENT <br />' Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations The relative ground water elevation on 29 November 2000 was <br /> approximately 34 25 feet below msl,with the average depth ofwater at 59 19 feet below casing tops <br />' Ground water elevations were equal in the three wells located on the site, no flow direction or <br /> gradient could be inferred <br /> i• <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />