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I W } • 30 July 2004 AGE-NC Project No 95-0121 Page 4 of 6 I The ground water elevation data obtained during this monitoring event from the ground water monitoring wells are depicted on Figure 3 The inferred ground water flow direction, from within the lower sand,level(confined)of the aquifer,for the area bound by wells MW-1 through MW-9 was inferred to have a net groundwater"flow towards the north-northwest at a gradient of 0 004 ft/ft or less, or approximately 21 feet per mile (Figure 3) I3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES TPH-g was detected in eight ground water samples collected from wells MW-1 through MW-4, MW-7,VW-2,VW-4 and VW-6 at concentrations as high as 32,000 micrograms per liter(gg/1)from MW-1 (Figure 4) TPH-d was detected in six ground water samples collected from wells MW-1 through MW-4,MW-7 and VW-4 at concentrations as high as 32,000µg/1 from VW-1,however the laboratory reported the sample chromatograms to be more representative of gasoline I Various benzene, toluene, ethylbenzene and xylene (BTEX) constituents were detected in eight ground water sample collected from wells MW-1 through MW-4,MW-7,VW-2,VW,-4 and VW-6 at concentrations as high as 15,000 41 benzene firorn well MW-2 MTBE was detected in the water samples collected from wells MW-1, MW-2, MW-3 and VW-4 at concentrations as high as 290 gg/1 from well MW-1, DIPE was detected in the water sample collected from well MW-1 at a concentration of 5 }tg/l, 1,2-DCA was detected in the water sample collected from well VW-4 at a concentration of 55 pg/1 No other fuel components were detected Iduring the laboratory analysis s Previous and current analytical results of ground water monitoring well samples are summarized In Tables 3 and 4 The laboratory reports(Cal Tech Environmental Laboratories Sample I D 0312-190) and chain of custody forms are presented in Appendix C GeoTracker confirmation pages of the submitted laboratory electromc deliverable format (EDF) files are Included to Appendix D I 4.0. - SUMMARY AND-CONCLUSIONS The Implications from Fourth Quarter 2003 ground water`monitoring events are as follows Y • The net groundwater flow direction for the area bound by wells MW-1 through MW-9 was ` Inferred to be towards the north-northwest at a gradient of 0 004 ft/ft or less (Figure 3) The flow dtrectton may not represent the uppermost water table flow direction I Advanced GeoEnvironmental,Inc , w Y