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' 13 November 2000 <br /> AGE-NC Project No 98-0465 <br /> Page 2 of 4 <br /> 1 ml 18% hydrochloric acid as a sample preservative After collection, the samples were properly <br /> labeled, placed in a chilled container and transported under chain-of-custody to McCampbell <br /> Analytical, Inc (MAI) for analysis The samples were analyzed for the following <br /> ' G 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 /> ' Volatile aromatic compounds benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8020, and <br /> ' a Fuel oxygenates MTBE, di-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 /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> 18 October 2000, the contaminant impact to ground water was assessed from the laboratory <br /> analytical data <br /> ' 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> ' At the time of the October 2000 sampling event, depths to ground water ranged from 11 35 feet to <br /> r 12 34 feet below the tops of the well casings Relative ground water elevations at the site ranged <br /> ' from 8 61 feet below mean sea level (MSL) In well MW4 to 8 70 feet above MSL In well MW2 ` <br /> (Table 1) During this monitoring event, the ground water level in the wells was approximately 6 35 <br /> to 7 45 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 decreased <br /> an average of 163 feet between the July 2000 and October 2000 monitoring events <br /> ' Ground water is flowing toward the northwest under an average gradient of 0 0013 feet/feet Figure <br /> 3 illustrates the contoured ground water elevations as measured on 18 October 2000 <br /> ' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> ' Each sample was analyzed for TPH-g, TPH-d, BTEX, and for the suite of five oxygenated fuel <br /> additives TPH-g was not detected at concentrations at or above the laboratory reporting limits in any <br /> of the ground water samples <br /> Advanced GeoEnvtronmental,Inc <br /> 1 <br />