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<br /> 03 April 2006
<br /> AGE-NC Project No 99-0559
<br /> Page 3 of 5
<br /> by EPA method 8260
<br /> 23 GROUND WATER TREATMENT RESULTS
<br /> The pump-and-treat system was operational during the fourth quarter 2005 Total flow(totalizer)was
<br /> recorded between 19 September 2005 and 31 December 2005 utilizing the Blue-White Industries F-
<br /> 2000 flow meter(Table 2) During the reporting period the flow meter recorded a volume of 308,420
<br /> gallons or 1,167,370 liters of discharged water
<br /> 2 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 Analytical results of pump-and-treat influent samples are summarized in
<br /> Table 1 The following is a summary of the detected concentrations
<br /> • 18 October Individual samples were collected from each ground water extraction well
<br /> influent stream and analyzed The highest concentration of TPH-g was detected in the sample
<br /> collected from well EW-2,at 180,000µg/1 The highest concentrations of BTEX compounds
<br /> detected were 33,000 µg/l benzene,38,000µg/1 toluene,5,000 µg/1 ethylbenzene and 21,000
<br /> µg/l xylenes(all from EW-2) MTBE concentrations ranged between 2,000µg/1(EW-3)and
<br /> 37,000 µg/l (EW-2)
<br /> • 28 November Individual samples were collected from ground water extraction wells EW-2,
<br /> EW-3 and EW-4 Influent streams, and the combined influent stream, and analyzed The
<br /> highest concentration of TPH-g was detected In the sample collected from well EW-4, at
<br /> 190,000 µg/l The highest concentrations of BTEX compounds detected were 48,000 µg/l
<br /> benzene (EW-4), 33,000µg/l toluene (EW-2), 7,500 µg/1 ethylbenzene (EW-4) and 27,000
<br /> µg/1 xylenes(EW-4) MTBE concentrations ranged between 2,300 µg/1(EW-3)and 62,000
<br /> µg/1 (EW-2)
<br /> • 20 December Individual samples were collected from each ground water extraction wells
<br /> EW-2, EW-3 and EW-4 Influent streams, and the combined Influent stream, and analyzed
<br /> The highest concentration of TPH-g was detected In the sample collected from well EW-2,
<br /> at 270,000 µg/1 The highest concentrations of BTEX compounds detected were 41,000 µg/1
<br /> benzene(EW-2),91,000µg/l toluene(EW-2), 10,000 gg/l ethyl-benzene(EW-2)and 61,000
<br /> µg/l xylenes (EW-2) MTBE concentrations ranged between 7,500 µg/l(EW-3) and 63,000
<br /> µg11 (EW-2) 26 May An Influent stream sample was collected and analyzed The
<br /> concentration of TPH-g was 36,000 µg/1 The concentrations of BTEX compounds detected
<br /> were 5,500 µg/1 benzene, 6,900µg11 toluene, 1,700 µg/1 ethylbenzene and 11,000 µg/l
<br /> Advanced GeoEnvironmental,Inc
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