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' 02 June 2005 • AGE-NC Project No 95-0130 ' Page 4 of 13 ' elevation at the site increased an average of 0 81 feet between the December 2004 and the March 2005 ground water monitoring events First zone(35 to 55 feet)ground water flow direction at the Top Filling Station was inferred to be towards the southeast at an approximate gradient of ' 0 003 ft/ft, Second zone (55 to 85 feet bsg) ground water flow direction at the Top Filling Station was inferred to be towards the northeast at a gradient of 0 003 ft/ft or less The First and Second zone ground water elevation data collected during the March 2005 ground water monitoring event is ' depicted on Figures 3 and 4, respectively ' 2 4 2 LABORATORY RESULTS OF MONITORING WELL GROUND WATER SAMPLES On 04 March 2005,a total of fifteen ground water samples were submitted to CTEL,a DHS-certified Ilaboratory, for the analysis referenced in Section 2 3 TPH-g was detected in all fifteen water samples at concentrations as high as 230,000 micrograms ' per liter (µg/1) in the sample collected from VW-2A The estimated extent of First Zone (between 35 and 55 feet bsg)and Second Zone(between 55 and 80 feet bsg)dissolved TPH-g are depicted in ' Figures 5 and 7, respectively Benzene was detected in the above monitoring well samples at a maximum concentration of 87,000 ' µg/1 (MW-7B) Other BTEX compounds were detected in the above monitoring well samples at concentrations as high as 53,000 µg/1 toluene from VW-1C, 5,500 µg/1 ethylbenzene from VW-2A and 20,600 µg/l total xylenes from VW-2A ' MTBE was detected in ground water samples collected from wells MW-3, MW-6(B-D),MW-7B, VW-IC, VW-2A and VW-3A at concentrations as high as 5,400 µg/l (MW-6B) The estimated ' extent of First Zone and Second Zone dissolved MTBE are depicted in Figures 6 and 8,respectively 1,2-DCA was detected in ground water samples collected from wells MW-7B, MW-8, VW-1C, ' VW-2A and VW-3A at concentrations as high as 150µg/l(MW-7B),TAME was detected in ground water samples collected from wells MW-1, MW-2, MW-3, MW-6 (B-E), MW-7 (B-D), VW-1C, VW-2A and VW-3 A at concentrations as high as 49 µg/1 (VW-I C) ' 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 Laboratory I D 0503054)and chain of custody forms are presented in Appendix D, GeoTracker confirmation pages of the submitted laboratory electronic deliverable format(EDF)files and depth to water measurements are included in Appendix E I • ' Advanced GeoEnvironmental,Inc