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' 14 May 2001 • AGE-NC Project No 95-0130 ' Page 3 of 5 ' feet between the October 2000 and the February 2001 ground water monitoring events The ground water elevation data for MW-1 through MW-5 during the February 2001 ground water monitoring event is depicted in Figure 3 ' Ground water flow direction in the area bound by wells MW-1, MW-3 and MW-5 was inferred to be toward the north at a gradient of 0 01 ft/ft or less, or approximately 53 feet or less per mile(Figure ' 3), ground water flow direction in the area bound by wells MW-1, MW-2, MW-3 and MW-4 was inferred to be towards the east-northeast at a gradient of 0 005 or less 3 2 LABORATORY RESULTS OF MONITORING WELL GROUND WATER SAMPLES A total of nine ground water samples were submitted to a DHS-certified laboratory in February 2001 TPH-g was detected in water samples collected from wells MW-1,MW-2,MW-3, MW-5, VW-1B, VW-1C, VW-2A, VW-2B and VW-3A at concentrations as high as 220,000 micrograms per liter ' (4g11),the laboratory reported each TPH-g chromatogram as having unmodified or weakly modified gasoline patterns BTEX compounds were detected in water samples collected from wells MW-1, MW-2, MW-3, MW-4,MW-5, VW-1B,VW-1C,VW-2A,VW-2B and VW-3A at concentrations as high as 43,000 µg/1 (toluene, VW-113) The greatest benzene-impact was detected in samples from wells VW-1C and VW-2A at concentrations of 27,000 µg/1 MTBE was detected in ground water samples collected from wells MW-1, MW-2, MW-3, VW-1B, VW-1C, VW-2A, VW-2B and VW-3A at concentrations as high as 3,800µg/1, TBA was detected in water samples collected from wells MW-3, MW-5 and VW-2B at concentrations as high as 110 µg/1, 1,2-DCA was detected in wells MW-2, MW-3, VW-113, VW-1C, VW-2A, VW-2B and VW-3B at concentrations as high as 250 µg/1 No other fuel components were detected In any other ground water samples Previous and current analytical results of ground water monitoring well samples are summarized in Tables 2 and 3, the estimated extent of dissolved petroleum hydrocarbons is depicted in cross sectional views C-C' and D-D'(Figures 6 and 7,respectively) The laboratory reports (McCampbell Analytical Inc I D No 59690 through 59700) and chain-of-custody forms are presented in Appendix B 4.0. SUMMARY AND CONCLUSIONS The Implications from the February 2001 ground water monitoring event are as follows • Ground water flow direction was inferred towards the north at a gradient of 0 01 ft/ft in the Advanced GeoEnvironmental,Inc