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i <br /> 15 April 2004 <br /> AGE-NC Project No 99-0559 <br /> Page 10 of 13 <br />! In addition to TPH-g, BTEX and MTBE, effluent samples were analyzed for <br /> • TPH-d by EPA Method 8015 Modified and <br /> • pH in accordance with EPA Method 150 1 1, and <br /> The 16 June 2003 influent sample also was analyzed for the fuel additives 1,2-Dichloroethane <br /> (1,2-DCA), ethylene dibromide(EDB),tert-amyl methyl ether(TAME), di-isopropyl ether(DIPE), <br /> lethyl tert-butyl ether(ETBE) and tert-butanol (TBA) by EPA Method 8260B <br /> 4.0. FINDINGS <br /> Analytical results of influent ground water samples and ground water extraction measurements were <br /> used to evaluated the volume of impacted ground water removed and mass of hydrocarbons treated <br /> 41 GROUND WATER TREATMENT RESULTS <br /> The pump-and-treat system was operational between 15 May and 18 December 2003 Total flow <br /> (totalizer)was recorded between 15 May and 18 December 2003 utilizing the Blue-White Industries <br /> F-2000 flow meter(Table 1), during the reporting period, the flow meter exceeded the total volume <br /> recorded, indicating a volume of 100,000 gallons was recorded Based on approximately 164,246 <br /> gallons of discharged water recorded on the meter, AGE estimated that an average of 850 gallons <br /> of water were discharged per day <br /> 4 1 1 Laboratory Analysis of Ground Water Samples <br /> TPH-g and BTEX compounds and MTBE were detected in the influent samples from wells EW-1, <br /> EW-2, EW-3, EW-4 and one influent sample The following is a summary of the detected <br /> concentrations <br /> • 15 May The highest concentrations of TPH-g were detected in the samples collected from <br /> wells EW-1 and EW-2, at 190,000µg/1 The highest concentrations of BTEX compounds <br /> were detected from well EW-1, with benzene at 28,000 µg11, toluene at 45,000µg/1, ethyl <br /> benzene at 2,800 µg/l, and xylenes at 15,000 µg/1 MTBE concentrations ranged between <br /> I3,900 µg/l (EW-1) and 23,000 µg/1 (EW-4) <br /> • 09 June The highest concentrations of TPH-g and BTEX compounds were detected in the <br /> sample collected from well EW-2 at 230,000 µg/1 TPH-g, 26,000 µg/1 benzene, 37,000µg/1 <br /> toluene, 3,100 µg/1 ethyl benzene and 17,000 µg/l xylenes MTBE concentrations ranged <br /> between 8,000 µg/l (EW-3) and 70,000 µg/1 (EW-4) <br /> Advanced GeoEnvlronmental,Inc <br />