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05 January 2004 AGE-NC Project No 97-0333 ' Page 8of11 Various BTEX constituents were detected in three (3)water samples collected from wells MW-1, MW-2 and MW-4 at maximum concentrations of 110 µg/l benzene, 180 µg/1 toluene, 150 µg11 ethylbenzene and 630µg11 xylenes from well MW-2 Benzene was only detected in wells MW-1 and MW-4 MTBE (utilizing EPA Method 8260M) was detected in eleven water samples collected from monitoring wells MW-1 through MW-4,MW-7 (A-E),MW-8A and MW-12B at concentrations as high as 17,000 µg/1 (MW-2), iso-concentration maps displaying the estimated extent of dissolved MTBE in First Zone and Second Zone aquifer are depicted on Figures 8 and 9 ' TAME was detected in five(5)water samples collected from monitoring wells MW-1,MW-2,MW- 3,MW-7 (A and B) at concentrations as high as 210 µg/1(MW-2), 1,2-DCA was detected in six(6) ' water samples collected from monitoring wells MW-7 (C-D), MW-8 (B-C), MW-10 (B-C) at concentrations as high as 7 2 µg11 (MW-10B) , rPCE was detected in 43 of 46 water samples collected from monitoring wells MW-1 through MW-13 at concentrations as high as 2,100µg/1 from wells MW-3,TCE was detected in twenty-four (24)water samples collected from wells MW-2 through MW-4,MW-7(A-E),MW-8(B-D),MW-9 (A-B), MW-10 (A-C, F),MW-11 (C-D), MW-12 (A-D) and MW-13 (F) at concentrations as high as 470 µg/1 from well MW-10B An iso-concentration map displaying the estimated extent of ' dissolved PCE in First Zone water is depicted in Figure 10 No other constituents of concern were detected above laboratory reporting limits in the water ' samples collected during the third quarter 2004 sampling event Analytical results of ground water monitoring well samples are summarized in Tables 5 and 6 The laboratory reports (CTEL Laboratory I D Nos 0410-022 and 0410-030) and chain of custody forms are presented in Appendix G, GeoTracker confirmation pages of the submitted laboratory electronic deliverable format (EDF) files are included in Appendix B 4.0. SUMMARY AND CONCLUSIONS Previous soil characteristics data obtained by a CPT investigation enabled AGE to define four high permeability, informal hydrologic units (CPT Site Investigation - Fourth Quarter 2000, dated 07 February 2001) The informal hydrogeologic' units were defined as First Zone (15-47 feet bsg),Second Zone(58-92 feet bsg), Third Zone(102-120 feet bsg) and Primary Aquifer Zone (128-150 feet bsg), and are separated by less-permeable, fine-grained intervals ' The results of pump and treat ground water remediation between 23 June 2004 and 15 September 2004 are as follows Advanced GeoEnvironmental,Inc