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i 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 MTB Sampled Elevation Water Thickness water in E Comments 8260E benzene Xylenes 8021B 82608 I Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µgh) (µg/1) (µg/1) (µg/1) (µg/1) (µg/1) (µg/1) (Ag/1) MW-16 continued 10109103 13.42 12.65 0.00 0.77 -- -- ND<100 ND<I.0 ND<1.0 ND<1.0 ND<2,0 -- 180 01/26/04 13,42 10,83 0.00 2,59 1.82 -- 340 ND<2.5 ND<2.5 ND<2.5 ND<5.0 480 04/27/04 13.42 10.59 0.00 2.83 0.24 260 ND<2.5 ND<2.5 ND<2.5 ND<5.0 -- 270 07/19/04 13.42 12.05 0.00 1.37 -1.46 -- 300 ND<2.5 ND<2.5 ND<2.5 ND<5,0 -- 240 10/13/04 13,42 I3.35 0.00 0,07 -1.30 -- 320 ND<2.5 ND<2.5 ND<2.5 ND<5,0 -- 420 01/10/05 13.42 11.65 0.00 1.77 1.70 -- ND<250 ND<0.50 ND<0.50 ND<0.50 ND<1.0 580 04/27/05 13,42 9.65 0.00 3.77 2.00 -- 63 ND<0.50 ND<0.50 ND<0.50 ND<1.0 .- 500 07/20/05 13.42 10.81 0.00 2.61 -1.16 -- ND<200 ND<2.0 ND<2.0 ND<2.0 ND<4.0 230 MW-17 (Screen Interval in feet:5.0-25.0) 04/27/05 15.02 11,39 0.00 3.63 __ ._ 60 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<0.50 07/20/05 15.02 13.01 0.00 2.01 .1.62 ND<50 ND<0.50 ND<0.50 ND<0.50 1.1 ND<0.50 MW-18 (Screen Interval in feet:5.0-25.0) 04/27/05 15.30 11.67 0,00 3,63 __ ._ ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 __ ND<0.50 � 07/20/05 15,30 13.30 4.00 2.00 -1.63 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 MW-19 (Screen Interval in feet:5.0-25.0) 04/27/05 13.39 9.65 0.00 3.74 - -- ND<50 ND<0.50 ND<0.50 0.60 ND<1.0 -- ND<0.50 07/20/05 13.39 10.99 0.00 2.40 -1.34 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 I 01205 Page 13 of 13