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• Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS October 1998 Through October 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 802IB 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (41) (14g/1) (µg11) (µg11) (Ag l) (µg/1) MW-11 continued 07/25/03 14.18 11.82 0.00 2.36 0.07 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 10/09/03 14.18 12.89 0.00 1.29 -1.07 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 01/26/04 14.18 11.45 0.00 2.73 1.44 ND<50 ND<0.50 ND<0.50 ND<0.50 2.3 -- ND<2.0 04/27/04 14.18 10.61 0.00 3.57 0.84 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 07/19/04 14.18 11.86 0.00 2.32 -1.25 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<I.0 -- ND<0.50 10/13/04 14.18 13.61 0.00 0.57 -1.75 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 01/10/05 14.18 12.21 0.00 1.97 1.40 -- ND<50 ND<0.50 ND<0.50 ND<0.50 1.1 -- ND<0.50 04/27/05 14.18 10.14 0.00 4.04 2.07 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 07/20/05 14.18 10.83 0.00 3.35 -0.69 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 10/05/05 14.18 12.12 0.00 2.06 -1.29 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 MW-12 (Screen Interval in feet:5.0-25.0) 11/21/02 14.25 11.84 0.00 2.41 -- ND<50 13 4.2 280 1100 -- 1300 04/25/03 14.25 10.96 0.00 3.29 0.88 -- 9900 19 ND<10 650 1800 -- 1400 07/25/03 14.25 12.03 0.00 2.22 -1.07 -- 7600 IS ND<10 390 1100 __ 880 I0/09/03 14.25 13.16 0.00 1.09 -1.13 -- 16000 37 ND<13 1100 3500 -- 540 01/26/04 14.25 11.47 .0.00 2,78 1.69 -- 6100 8.5 ND<5.0 280 880 -- 750 04/27/04 14.25 10.73 0.00 3.52 0.74 -- 9400 14 6.6 470 1600 -- 350 07/19/04 14.25 12.09 0.00 2.16 -1.36 -- 8300 10 6.3 450 1500 -- 350 10/13/04 14.25 13.82 0.00 0.43 -1.73 2700 4.4 ND<1.0 130 500 - 200 01/10/05 14.25 12.36 0.00 1.89 1.46 4700 4.3 ND<1.0 190 550 -- 200 04/27/05 14.25 10.25 0.00 4.00 2.11 -- 5500 3.4 ND<2.0 200 690 -- 170 07/20/05 14.25 9.95 0.00 4.30 0.30 -- 22000 ND<25 ND<25 760 2400 -- I10 10/05(05 14.25 12.32 0.00 1.93 -2.37 -- 13000 ND<25 ND<25 340 980 120 MW-13 (Screen Interval in feet:5.0-25.0) 01205 Page I 1 of 14