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t Table 1 SUMMARY OF GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS April 27,2004 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) (1g/1) (µ8l1) (4g/1) (41) (41) (41) (µg/1) (41) MW-1 (Screen Interval in feet 60-260) 4/27/2004 1762 1302 000 460 1 11 -- 12000 160 56 1500 210 -- 26 MW-2 (Screen Interval in feet 60-260) 4/27/2004 1750 13 13 000 437 094 -- 12000 29 280 670 4700 -- ND<10 MW-3 (Screen Interval in feet 80-280) 4/27/2004 18 16 13 55 000 461 094 -- 1200 ND<0 50 ND<0 50 80 4 4 -- ND<0 50 MW4 (Screen Interval in feet-8 0-28 0) 4/27/2004 1775 13 12 000 4 63 0 93 -- 410 ND<0 50 ND<0 50 8 0 17 -- ND<0 50 MW-5 (Screen Interval in feet 40-240) 4/27/2004 1647 12 09 000 438 3 06 - 52000 87 1100 3100 16000 -- ND<50 MW-6 (Screen Interval in feet 40-240) 4/27/2004 1667 1246 000 421 108 -- 5100 19 35 270 900 -- 130 MW-7 (Screen Interval in feet 40-240) 4/27/2004 17 81 1340 000 4 41 1 05 -- 23000 13 280 1700 6300 -- ND<10 MW-8 (Screen Interval in feet 40-240) 4/27/2004 1725 12 38 000 4 87 0 83 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 50 MW-9 (Screen Interval in feet. 4 0-24 0) 4/27/2004 16 35 1189 000 446 097 -- 12000 13 12 720 1200 -- ND<5 0 MW-10 (Screen Interval in feet 60-260) 4/27/2004 1750 11 24 000 626 1 21 - ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 MW-11 (Screen Interval in feet 5 0-25 0) 4/27/2004 14 18 10 61 0 00 3 57 084 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 MW-12 (Screen Interval in feet 5.0-250) 4/27/2004 1425 1073 000 3 52 074 -- 9400 14 6 6 470 1600 350 MW-13 (Screen Interval in feet 5 0-25 0) 01205 Page 1 of 2