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I 1029 December 2004 AGE-NC Project No 95-0130 Page 4 of 10 Station was inferred to be towards the northeast at a gradient of 0 004 ft/ft or less The First and Second zone ground water elevation data collected during the September 2004 ground water monitoring event is depicted on Figures 3 and 4 2 4 2 LABORATORY RESULTS OF MONITORING WELL GROUND WATER SAMPLES On 30 September 2004, a total of fifteen ground water samples were submitted to CTEL, a DHS- certified laboratory, for the analysis referenced in Section 2 3 TPH-g was detected in thirteen water samples collected from wells MW-3, MW-5, MW-6 (B-E), MW-7 (B-D), MW-8, VW-1C, VW-2A and VW-3A at concentrations as high as 190,000 micrograms per liter (µg/1) in the sample collected from VW-2A Benzene was detected in the above monitoring well samples at a maximum concentration of 48,000 ptg/l (MW-7B) Other BTEX compounds were detected in the above monitoring well samples at concentrations as high as 44,000 µgd (toluene from VW-1C) • MTBE was detected in ground water samples collected from wells MW-3, MW-6 (B-E), MW-7 (B-C), VW-1C, VW-2A and VW-3A at concentrations as high as 4,200 µg/l (VW-3A), 1,2-DCA was detected in ground water samples collected from wells MW-6B, MW-7B, VW-1C, VW-2A at concentrations as high as 130µg/1(VW-2A),TAME was detected in ground water samples collected from wells MW-3,MW-6 (B-D), MW-7 (B-C),VW-1C, VW-2A and VW-3A at concentrations as high as 80 µg/1 (VW-1C) No other fuel components were detected in the ground water samples Previous and current analytical results of ground water monitoring well samples are summarized in Tables 3 and 4 The laboratory reports (CTEL Project No CT214-0410003) and chain of custody forms are presented in Appendix C, GeoTracker confirmation pages of the submitted laboratory electronic deliverable format(EDF) files and depth to water measurements are included in Appendix D 3.0. INTERIM SOIL VAPOR EXTRACTION REMEDIATION Between 31 August and 01 October 2004,an SVE remediation system was initiated and continuously I operated at the site, utilizing an electric catalytic oxidizer SVE system to selectively apply an induced vacuum to wells VW-1 through VW-3 SVE procedures for the site were described in the AGE-prepared Interim Remediation Work Plan, dated 21 May 2003, and approved by the SJCEHD ' by letter dated 10 June 2003 Advanced GeoEnvironmental,Inc