Laserfiche WebLink
04 March 2005 <br /> • AGE-NC Project No 01-0877 <br /> Page 3 of 4 <br /> from well MW-3 and, 81,000 pg/l toluene, 12,000 pg/l ethylbenzene, and 64,000 µg/l total xylenes <br /> all from well MW-1 <br /> 1,2-DCA was detected in all four wells, at a maximum concentration of 130 µg/l(MW-3)and EDB <br /> was detected in the ground water samples collected from wells MW-1 through MW-3 at a maximum <br /> concentration of 140 µg/1 (MW-1) No other target analytes were detected at or above laboratory <br /> reporting limits in the ground water samples analyzed <br /> Concentration maps depicting the approximate distribution of dissolved TPH-g and benzene are <br />' presented in Figures 4 and 5,respectively The analytical results of ground water samples collected <br /> on 13 October 2004 are summarized in Table 2 The laboratory report (CTEL Project No CT214- <br /> 0410081),quality assurance/quality control(QA/QC)report,and chain of custody forms are included <br />' in Appendix C Documents confirming the upload of laboratory electronic deliverable format(EDF) <br /> files and depth to water measurements to GeoTracker are included in Appendix D <br />' 4.0. SUMMARY AND CONCLUSIONS <br />' • The following conclusions were drawn from the results of investigation <br /> • During the October 2004 monitoring event, the average ground water elevation at the site <br />' was 18 36 feet below MSL The ground water table forms a shallow northeast trending <br /> plunging-ridge, with a net ground water flow toward the northeast under a gradient of <br /> approximately 0 004 foot/foot <br /> • High concentrations of TPH-g and BTEX compounds were detected in all monitoring wells <br /> during the fourth quarter 2004, in addition, 1,2-DCA was detected in all four wells at a <br />' maximum concentration of 130 µg/l (MW-3), and EDB was detected in the ground water <br /> samples collected from wells MW-1 through MW-3 at a maximum concentration of 140µg/l <br /> (MW-1) <br /> r0 The fuel additive TAME was not detected this quarter in any of the ground water samples <br /> • The highest concentrations of contaminants were detected near the area of wells MW-1 and <br />' MW-3 These locations correspond to the location of the former UST#3,one of the possible <br /> mayor release point(s) of the UST system <br /> rAdvanced GeoEnvironmental,Inc <br />