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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS October 1998 Through July 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 8260E benzene Xylenes' 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (41) (µg11) (41) (µg11) (41) (µg/1) (µg11) MW-4 continued 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 07/29/02 17,75 14.03 0.00 3.72 -1.06 -- 3200 ND<10 ND<10 120 25 -- ND<40 10/25/02 17.75 15.33 0.00 2.42 -1.30 -- 2700 ND<5.0 ND<5.0 66 34 -- ND<20 01/24/03 17.75 14.55 0.00 3,20 0.78 -- 1000 ND<0.50 ND<0.50 9.2 ND<1.0 -- ND<2.0 04/25/03 17.75 14.06 0.00 3.69 0.49 -- 920 ND<5.0 ND<5.0 20 ND<10 -- ND<20 07/25/03 17.75 14.77 0.00 2.98 -0.71 -- 2500 30 27 57 89 -- 32 10/09/03 17.75 15.89 0.00 1.86 -1.12 1000 ND<0.50 ND<0,50 7.5 ND<1.0 ND<2.0 01/26/04 17.75 14.05 0.00 3,70 1.84 -- 1000 ND<0.50 ND<0.50 18 ND<1.0 -- ND<2.0 04/27/04 17.75 13.12 0.00 4.63 0.93 -- 410 ND<0,50 ND<0.50 8.0 1.7 -- ND<0,50 07/19/04 17.75 14.50 0.00 3.25 -1.38 -- 890 ND<0.50 ND<0.50 25 4.7 -- ND<0.50 10/13/04 17.75 16.80 0.00 0.95 -2.30 440 ND<0.50 ND<0,50 4,9 ND<1.0 -- ND<0.50 01/10/05 17.75 15.40 0.00 2.35 1.40 -- 360 ND<0.50 ND<0.50 3.8 ND<1.0 -- ND<0.50 04/27/05 17,75 13.39 0.00 4.36 2.01 -- 180 ND<0.50 ND<0.50 0.78 ND<1.0 -- ND<0.50 07/20/05 17.75 14,06 0.00 3.69 -0.67 370 ND<0.50 ND<0.50 6.0 2.2 -- ND<0.50 MW-5 (Screen Interval in feet:4.0-23.42) 01/08/01 16.48 10.95 0.00 5.53 -- 64000 -- 120 1300 5000 30000 ND 27 04/26/01 16.48 10.37 0.00 6.11 0.58 73000 -- 103 770 5360 30200 ND ND 07/19/01 16.48 11.26 0.00 5.22 -0.89 110000 -- 230 3500 4500 26000 ND ND 10/25/01 16.48 12.69 0,00 3.79 -1.43 63000 -- 480 3700 4500 22000 ND<1000 ND<50 01205 Page 5 of 13