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r <br /> 12 December 2006 <br /> • AGE-NC Project No 01-0827 <br /> rPage 11 of 14 <br />' 1,2-dichloroethane (1,2-DCA) and randomly di-isopropyl ether (DIPE), tert butanol (TBA), ethyl <br /> tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether (TAME) The following fuel additives <br /> have been detected constantly <br />' • MTBE in well VW2d at concentrations as high as 120 µg/l (31 December 2002) and <br /> currently is non-detected, while MTBE was previously steadily detected in well MW-1 and <br />' VW-5d at low concentration, these well samples are currently non detect for MTBE, <br /> • 1,2-DCA in monitoring wells MW-I and vapor well VW-1, VW-2d and VW-d5, 1,2-DCA <br />' is currently non-detected in the sample from the wells, <br /> • Occasional occurrences of DIPE, TBA, and/or TAME detection have no longer been <br /> regularly documented <br /> The lateral extent of the dissolved petroleum hydrocarbon plume is defined toward the east by well <br /> VW-3, west by well MW-5, south by well MW-3 northeast by well PZ-1, RW-I and north by well <br /> t MW-4 and boring 17 The dissolved petroleum hydrocarbon plume is currently vertically defined <br /> n e of er U release and vertically at location of the highest soil contamination by well <br /> MW-6, screened from 60 feet to 65 feet bsg <br />' 63 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of twenty-four soil samples were analyzed from the site Samples were collected in locations <br />' which previously had hydrocarbon impact <br /> TPH-g was detected in soil samples collected from boring C133 at 25 feet and 30 feet bsg at <br /> concentrations of 220 mg/kg and 43 mg/kg, respectively <br /> BTEX compounds were detected in the soil samples collected from boring CB3 at 25 feet and 30 feet <br /> bsg at maximum concentrations of 0 084 mg/kg benzene, 0 044 mg/kg toluene, 10 mg/kg <br /> ethylbenzene, and 5 6 mg/kg total xylenes in sample CB3-25 <br /> No other analytes were found at or above laboratory reporting limits Analytical results are <br /> summarized in Table 1 The laboratory reports(CTEL ProjectNo CT214-0609152),QA/QC reports, <br /> and chain of custody forms are included in Appendix G GeoTracker confirmation pages of the <br /> submitted laboratory electronic deliverable format (EDF) files are included in Appendix E <br /> I <br /> Advanced GeoEnvironmentai,Inc <br />