ARCHIVED REPORTS XR0011226 - Laserfiche WebLink

Home Browse Search

05 January 2006 • AGE-NC Project No 97-0326 ' Page 4 of 5 concentrations of 11,000µg/1 TPH-g,2,400µg/1 benzene,76 µg11 toluene,82µg11 ethylbenzene,and ' 245 µg/1 xylenes (sample MW-9B) ' The fuel additives DIPS, TAME, and 1,2-DCA were detected in samples MW-8B and MW-9B at maximum concentrations of 32 µg/1 (MW-913), 22 µg/l (MW-8B), and 38 µg/l (MW-9B), respectively ' HU4-TPH-g and BTEX compounds were detected in samples MW-8C and MW-9C,the maximum concentrations were detected in sample MW-9C at 2,800 µg/1 TPH-g, 1,000 µg/1 benzene, 33 µg/1 ' toluene, 17 µg/1 ethylbenzene, and 52 µg/l xylenes The fuel additives TAME and 1,2-DCA were detected in samples MW-8C and MW-9C at maximum ' concentrations of 28 }tg/l and 15 µg/l, respectively, in sample MW-9C HU6-TPH-g and BTEX compounds were detected in samples MW-8D and MW-9D,the maximum ' concentrations were detected in sample MW-9D at 1,000 µg/l TPH-g, 150 µg11 benzene, 14 µg/l toluene, 10 µg/1 ethylbenzene, and 32 8 pg/1 xylenes • The fuel additive TAME was detected in sample MW-9D at a concentration of 6 8 µg/1,and the fuel additive 1,2-DCA was detected in samples MW-8D and MW-9D at concentrations of 2 6 µg/l and ' 4 6 µg/1, respectively No additional analytes were detected at or above the laboratory reporting limits in the samples ' analyzed Analytical results are summarized in Table 2 The laboratory report (CTEL Project No CT214-0509186),quality assurance/quality control report,and chain of custody forms are presented in Appendix C Documents confirming the upload of laboratory electronic deliverable format(EDF) ' files and depth to water measurements to GeoTracker are provided in Appendix D i ' 4.0. SUMMARY AND CONCLUSIONS The following conclusions were drawn from the results of this investigation ' The ground water elevations on 12 December 2005 ranged from 21 66 feet to 22 77 feet below MSL, the net flow direction of first-encountered ground water was inferred to be ' toward the south at a gradient of approximately 0 004 ft/ft, which is consistent with the historical flow direction at this site ' TPH-g and BTEX compounds were detected in ground water samples collected from all HUs, the highest concentrations were detected in HU 1 The fuel additive MTBE was • detected only in HU 1, and DIPE was detected in HU I and HU2 TAME and 1,2-DCA were 1 Advanced GeoEnvironmentai,Inc 1