|
25 January 2005
<br /> AGE-NC Project No 99-0559
<br /> Page 8 of 10
<br /> 360,000µg/l, ethyl-benzene at 200,000 pg/l, and xylenes at 1,400,000 pg/l MTBE
<br /> concentrations ranged between 720 gg/1 (EW-3) and 130,000 µg/1 (EW-2)
<br /> • 22 November 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-2, at 3,700,000 pg/1 The highest concentrations of BTEX
<br /> compounds were detected from well EW-2, with benzene at 58,000 µg/l, toluene at
<br /> 720,000pg/l, ethyl-benzene at 390,000 pg/l, and xylenes at 2,600,000 pg/l MTBE
<br /> concentrations ranged between 1,700 pg/1 (EW-3) and 140,000 pg/l (EW-2)
<br /> • 14 December 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-2, at 34,000,000 pg/l The highest concentrations ofBTEX
<br /> compounds were detected from well EW-2, with benzene at 500,000 gg/l, toluene at
<br /> 3,400,00Opg/l, ethyl-benzene at 1,900,000 pg/l, and xylenes at 2,100,000 pg/1 MTBE
<br /> concentrations ranged between 620 pg/1 (EW-3) and 370,000 pg/1 (EW-2)
<br /> TPH-g,xylene and MTBE were detected in the effluent sample collected on 19 September 2004 Due
<br /> to the minor detection of MTBE at 120 pg/l, the discharge was suspended and all 4,000 lbs of
<br /> granular activated carbon were replaced to provide for complete recovery of dissolved MTBE The
<br /> treatment system effluent sampling conducted on the 04, 14 and 27 of October were all non-detect
<br /> for MTBE and petroleum hydrocarbons
<br /> Analytical results of pump and treat water samples are summarized in Table 3 CTEL laboratory
<br /> reports (CTEL Project No CT214-0407138, 0408114, 0409109, 0411164, 0412102, 0410001,
<br /> 04100021, 0410088 and 04010179) with QA/QC reports and chain of custody forms are included
<br /> in Appendix C GeoTracker confirmation pages of the submitted laboratory electronic deliverable
<br /> format (EDF) files are included in Appendix D
<br /> 3 5 MASS-VOLUME REMOVAL CALCULATIONS I
<br /> During the third and fourth quarters of 2004,an estimated 5,238 lbs of TPH-g, 80 lbs of benzene and
<br /> 105 lbs of MTBE were extracted from ground water Since the initiation of the ground water
<br /> extraction/treatment system in May 2003, a total of 5,768 lbs of TPH-g, 140 lbs of benzene and
<br /> 262 6 lbs of MTBE have been extracted from ground water The 2004 volumetric calculations from
<br /> the ground water pump-and-treat system are presented in Appendix E
<br /> Advanced GeoLnvironmental,inc
<br />
|