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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS October 1998 Through January 2005 Circle K Store 01205 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 82608 benzene Xylenes 8021B 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/]) (lig/1) (µg/1) (1g/1) (µg(l) (µg11) (go) (µg11) MW-3 continued 04/25/03 18.16 14.47 0,00 3.69 0.13 -- 1700 ND<5.0 ND<5.0 41 ND<10 -- ND<20 07/25/03 18.16 15.19 0.00 2.97 -0.72 -- 2500 ND<0.50 ND<0.50 25 1.3 ND<2.0 10/09/03 18.16 16,39 0.00 1.77 -1.20 -- 260 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 01/26/04 18.16 14.49 0.00 3.67 1.90 -- 1500 ND<0.50 ND<0.50 37 1.1 ND<2.0 04/27/04 18.16 13.55 0.00 4.61 0.94 -- 1200 ND<0.50 ND<0.50 80 4.4 -- ND<0.50 07/19/04 18.16 14.93 0.00 3,23 -1.38 -- 570 ND<0.50 ND<0.50 15 2.0 -- ND<0.50 10/13/04 18.16 17.30 0.00 0.86 -2.37 -- 120 ND<0.50 ND<0.50 1.4 ND<1.0 -- ND<0.50 01/10/05 18.16 15.87 0.00 2.29 1.43 -- 390 ND<0.50 ND<0.50 5.6 1.1 -- ND<0.50 MW-4 (Screen Interval in feet: 8.0-28.0) 10/08/98 17.75 11.29 0.00 6.46 -- 7600 -- 6.6 2.3 430 860 -- ND 01/25/99 17.75 11.74 0.00 6.01 -0.45 1300 -- 10 ND 30 29 ND -- 04/29/99 17.75 10.25 0.00 7.50 1.49 ND -- ND ND ND ND ND -- 07/16/99 17.75 11.12 0.00 6.63 -0.87 290 -- 1.1 ND 5.4 8.5 ND ND 10/21/99 17.75 11.36 0.00 6.39 -0.24 320 -- 2.5 ND 7.4 7.3 ND ND 01/31/00 I7.75 10.36 0.00 7.39 1.00 2600 -- 11 ND 130 160 ND ND 04/10/00 17.75 8.56 0.00 9.19 1.80 ND -- ND ND ND ND ND ND 07/05/00 17.75 9,48 0.00 8.27 -0.92 ND -- ND ND ND ND ND ND 10/20/00 17.75 11.52 0.00 6.23 -2.04 245 -- 1.06 ND 6.35 3.74 ND ND 01/08/01 17.75 12.05 0.00 5.70 -0.53 1700 -- 9.5 ND 43 22 ND ND 04/26/01 17.75 11.43 0.00 6.32 0.62 1430 - 9.47 ND 71.6 33.5 ND ND 07/19/0I 17.75 12.38 0.00 5.37 -0.95 1400 -- 6.8 ND 62 34 ND ND 10/25/01 17,75 13.87 0.00 3.88 -1.49 1600 - 9.2 ND<2.5 74 41 ND<25 ND<1.0 01/29/02 17.75 13.58 0.00 4.17 0.29 1000 -- 11 ND<2.5 38 14 ND<25 ND<2.0 04/29/02 17.75 12.97 0.00 4.78 0.61 630 -- 7.8 0.70 24 6.2 5.9 ND<2.0 01206 Page 4 of 11 I