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Table 2 HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS July 2003 Through January 2004 Circle K Store 01205 Date TOC Depth to LPH Ground- Change in TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water Elevation 8260B benzene Xylenes 8021B 8260B Elevation (feet) (feet) (feet) (feet) (feet) (µall) (µg/1) (µg11) (µg/1) (µg/1) (41) (µg/1) (µg/1) MW-1 (Screen Interval in feet 6 0-26 0) 7125103 1762 1465 000 297 -- 70000 110 1600 3200 23000 ND<400 1019/03 1762 15 85 000 177 -120 3100 34 34 260 820 ND<20 1/26/04 1762 1413 000 349 172 380 20 3 9 4 5 10 87 MW-2 (Screen Interval in feet 6 0-26 0) 7125/03 1750 1456 000 294 -- 170 072 ND<0 50 3 6 2 9 35 1019/03 1750 1580 000 1 70 -124 76 ND<0 50 ND<0 50 ND<0 50 ND<1 0 37 1/26104 1750 1407 000 3 43 1 73 1500 560 26 ND<5 0 ND<10 490 MW-3 (Screen Interval in feet 8 0-28 0) 7/25/03 18 16 15 19 000 2 97 -- 2500 ND<0 50 ND<0 50 25 13 ND<2 0 10/9/03 18 16 1639 000 1 77 -120 260 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 i 1/26104 1816 1449 000 3 67 190 1500 ND<0 50 ND<0 50 37 1 1 ND<2 0 MW4 (Screen Interval in feet 8 0-28 0) 7125103 1775 1477 000 298 -- 2500 30 27 57 89 32 10/9103 1775 15 89 000 186 -1 12 1000 ND<0 50 ND<0 50 7 5 ND 1126/04 1775 1405 000 3 70 1 84 1000 ND<0 50 ND<0 50 18 ND<1 0 ND<2 0 MW-5 (Screen Interval in feet 4 0-24 0) 7/25103 1648 1355 000 293 -- 6400 200 990 2700 11000 ND<400 1019/03 1647 147S 000 172 -121 4500 79 54 600 710 ND<20 1126/04 1647 15 15 000 132 -040 14000 38 130 520 2700 ND<20 MW-6 (Screen Interval in feet 4 0-24 0) 7/25103 1668 13 83 000 285 -- 6400 30 200 510 1700 320 1019103 1667 IS 10 000 157 -128 1700 2 9 17 80 300 180 1126104 1667 1354 000 3 13 156 360 ND<2 5 ND<2 5 6 6 30 220 MW-7 (Screen Interval in feet 4 0-24 0) 7/25/03 1781 1490 000 2 91 -- 31000 ND<25 310 1400 4800 ND<100 01205 Page 1 of 3