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<br /> I15 April 2004
<br /> i AGE-NC Project No 99-0559
<br /> Page I 1 of 13
<br /> • 16 June The highest concentrations of TPH-g and BTEX compounds were detected In the
<br /> sample collected from well EW-2 at 210,000 µg/1 TPH-g, 25,000 gg/l benzene, 37,000µg/1
<br /> toluene, 3,700 µg/1 ethyl benzene and 22,000 µg/1 xylenes MTBE concentrations ranged
<br /> between 9,300 µg/l (EW-3) and 64,000 µg/1 (EW-2)
<br /> • 21 July The highest concentrations of TPH-g and BTEX compounds were detected In the
<br /> sample collected from well EW-2 at 310,000 gg/l TPH-g, 15,000 µg/1 benzene, 20,000µg/1
<br /> toluene, 1,400 gg/1 ethyl benzene and 14,000 gg/l xylenes MTBE concentrations ranged
<br /> between 2,600 µg/1 (EW-1) and 170,000 µg/1 (EW-2)
<br /> • 18 August The highest concentration of TPH-g was detected In the sample collected from
<br /> well EW-2,at 242,000 gg/l The highest BTEX compounds were detected from wells EW-1
<br /> and EW-2, at 14,000 µg/1 benzene (EW-1), 28,000gg/l toluene (EW-1), 2,600 µg/1 ethyl
<br /> benzene (EW-2) and 18,000 gg/l xylenes (EW-2) MTBE concentrations ranged between
<br /> 2,300 gg/l (EW-1) and 108,000 µg/1 (EW-2)
<br /> • 29 September The highest concentrations of TPH-g and BTEX compounds were detected
<br /> in the sample collected from well EW-1 at 420,000 µg/l TPH-g, 21,000 gg/l benzene,
<br /> 27,000µg/1 toluene, 1,700 gg/l ethyl benzene and 150,000 µg/1 xylenes MTBE
<br /> • concentrations ranged between 3,800 gg/l (EW-1) and 120,000 gg/l (EW-2)
<br /> • 27 October Well EW-1 was not sampled this month The highest concentrations of TPH-g
<br /> and BTEX compounds were detected In the sample collected from well EW-2 at
<br /> 220,000µg/l TPH-g, 16,000µg/1 benzene,26,000µg/l toluene,2,400µg/1 ethyl benzene and
<br /> 14,000 gg/l xylenes MTBE concentrations ranged between 4,900 gg/l (EW-3) and
<br /> 25,000 gg/l (EW-2)
<br /> • 17 November Well EW-1 was not sampled this month The highest concentrations of TPH-g
<br /> and BTEX compounds were detected In the sample collected from well EW-2 at
<br /> 170,000µg/1 TPH-g,24,000µg/1 benzene,52,000µg/1 toluene,5,000µg/1 ethyl benzene and
<br /> 29,000 gg/l xylenes MTBE concentrations ranged between 2,800 µg/1 (EW-3) and
<br /> 37,000 gg/l (EW-2)
<br /> • 18 December Only a composite influent sample was collected, from the manifold pipeline
<br /> leading to the holding tank TPH-g was detected at 83,000 µg/l, benzene at 9,000 gg/l,
<br /> toluene at 20,000µg/1, ethyl benzene at 3,500 µg/1 and xylenes at 19,000 µg/1 MTBE was
<br /> detected at 24,000 gg/l
<br /> None of the contaminants of concern were detected in any of the effluent ground water treatment
<br /> samples Analytical results of pump and treat water samples are summarized in Tables 1, laboratory
<br /> reports are provided In Appendix C
<br /> Advanced CeoEnvkronmental,Inc
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