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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 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (pg/1) (gg/l) (µg/1) (gg/1) (ug/1) W/1) (41) MW-7 continued 01/26/04 17.81 14.45 0.00 3.36 1.73 -- 23000 ND<10 240 910 2900 -- ND<40 04/27/04 17.81 13.40 0.00 4.41 1.05 -- 23000 13 280 1700 6300 -- ND<10 07/19/04 17.81 14.68 0.00 3.13 -1.28 - 17000 ND<10 150 1300 3400 -- ND<10 10/13/04 17.81 17.03 0.00 0.78 -2.35 -- 3000 ND<2.5 25 250 450 -- ND<2.5 01/10/05 17.81 15.69 0.00 2.12 1.34 -- 11000 ND<2.5 57 510 1400 -- ND<2.5 04/27/05 17.81 13.61 0.00 4.20 2.08 -- 1500 ND<2.5 9.3 29 110 - ND<2.5 07/20/05 17.81 14.21 0.00 3.60 -0,60 -- 23000 35 150 1600 5300 -- ND<13 MW-8 (Screen Interval in feet,4.0-23.42) 01/08/01 17.26 11.40 0.00 5.86 -- ND -- ND 1.2 0.95 4.6 ND ND 04/26/01 17.26 10,70 0.00 6.56 0.70 ND -- ND ND ND ND ND ND 07/19/01 17.26 11.75 0.00 5.51 -1.05 ND - ND ND ND ND ND ND 10/25/01 17.26 13.32 0.00 3.94 -1.57 ND<50 -- ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<5.0 ND<1.0 01/29/02 17.26 12.53 0.00 4.73 0.79 ND<50 -- ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<5.0 ND<2.0 04/29/02 17.26 12.44 0.00 4,82 0.09 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<5.0 ND<2.0 07/29/02 17.26 13.56 0.00 3.70 -1.12 - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 10/25/02 17.26 14.81 0.00 2.45 -1.25 1700 0.70 42 83 350 - ND<2.0 01/24/03 17.26 14.00 0.00 3.26 0.81 -- 21000 16 35 920 2000 -- ND<10 04/25/03 17.26 13.44 0.00 3.82 0.56 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 07/25/03 17.26 14.23 0.00 3.03 -0.79 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 10/09103 17.25 15.36 0.00 1.89 -1.14 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 01/26/04 17.25 13.21 0.00 4.04 2,15 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 04/27/04 17.25 12.38 0.00 4.87 0.83 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 07/19/04 17.25 13.92 0.00 3.33 -1.54 -- ND<50 ND<0.50 ND<0.50 0.54 2.1 -- ND<0.50 10/13/04 17.25 16.32 0.00 093 -2.40 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 01205 Page 8 of 13