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eq n <br /> 25 January 2005 <br /> AGE-NC Project No 99-0559 <br /> Page 7of10 <br /> • pH in accordance with EPA Method 150 1 <br /> For the August 2004 sampling event,the following additional analytes were tested for in the effluent <br /> sample <br /> • Volatile and Semi-volatile compounds (VOC and SVOC) by EPA Methods 6241625 and <br /> Metals Cd, Cr, Cu, Pb,Ni and Zn in accordance with EPA Method 200 Modified <br /> 33 GROUND WATER TREATMENT RESULTS <br /> The pump-and-treat system was operational during the third and fourth quarters of 2004 Total flow <br /> (totalizer)was recorded between 24 June and 14 December 2004 utilizing the Blue-White Industries <br /> F-2000 flow meter (Table 3), during the reporting period the flow meter recorded a volume of <br /> 298,857 gallons or 1,131,173 liters of discharged water <br /> 3 4 ANALYTICAL RESULTS OF EXTRACTION WATER SAMPLES <br /> TPH-g, BTEX compounds and MTBE were detected in the influent samples from extraction wells <br /> EW-1 through EW-4 The following is a summary of the detected concentrations <br /> • 20 July Individual samples were collected from each ground water extraction well influent <br /> stream and analyzed The highest concentrations of TPH-g were detected in the sample <br /> collected from well EW-1, at 6,0000,000 µg/1 The highest concentrations of BTEX <br /> compounds were detected from well EW-1, with benzene at 18,000 µg11, toluene at <br /> 64,000gg/l,ethyl-benzene at 46,000µg/l,and xylenes at 240,000µg/1 MTBE concentrations <br /> ranged between 2,600 µg/l (EW-1) and 88,000 µg/l (EW-2) <br /> • 17 August Individual samples were collected from each ground water extraction well <br /> influent stream and analyzed The highest concentrations of TPH-g were detected in the <br /> sample collected from well EW-1, at 560,000 µg/l The highest concentrations of BTEX <br /> compounds were detected from well EW-1 with exception to xylenes, with benzene at <br /> 22,000 µg/l, toluene at 43,000pg/l, ethyl-benzene at 2,800 µg/1, and xylenes at 32,000 µg/1 <br /> (EW-4) MTBE concentrations ranged between 2,700µg/l (EW-1)and 45,000 gg/l(EW-2) <br /> • 16 September Individual samples were collected from each ground water extraction well <br /> influent stream and analyzed The highest concentrations of TPH-g were detected in the <br /> sample collected from well EW-I, at 1,600,000 µg/l The highest concentrations of BTEX <br /> compounds were detected from well EW-1, with benzene at 35,000 µg/l, toluene at <br /> Advanced Geohnvironmental,Inc <br />