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Table 1 SUMMARY OF GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS February 11,2004 76 Station 5886 i 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) (µfill) (µg11) (Ag/1) (µg/1) (µg/]) (µg/1) (µg11) (1g/1) MW-1 (Screen Interval in feet 50-250) 2111/04 -084 5 73 000 -657 020 1500 ND<13 ND<l3 ND<13 ND<25 -- 2100 MW-2 (Screen Interval in feet 50-250) 2111104 -030 S 85 000 -6 15 026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 5 7 MW-3 (Screen Interval in feet 50-250) 2111104 -014 5 97 000 -611 081 -- 79 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 89 MW-41) (Screen Interval in feet 220-250) 2/11/04 023 6 86 000 -663 0 26 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 MW-4S (Screen Interval in feet 50-150) 2111104 045 6 61 000 -616 0 28 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 2 0 MW-51) (Screen Interval in feet 205-240) 2111104 065 6 70 000 -605 040 -- ND<50 ND<0 50 ND<0 50 065 2 0 -- ND<2 0 MW-5S (Screen Interval in feet 50-150) 2/11104 0 25 630 000 -605 0 31 ND<50 ND<0 50 ND<0 50 ND<0 50 1 2 -- ND<2 0 MW-61) (Screen Interval in feet 220-250) 2/11/04 0 17 640 000 -623 021 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 MW-6S (Screen Interval in feet 50-150) 2111104 0 13 635 000 -622 027 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 MW-71) (Screen Interval in feet 230-255) 2111104 276 8 65 000 -5 89 024 -- ND<50 ND<0 50 ND<0 50 078 2 3 -- ND<2 0 MW-7S (Screen interval in feet 70-170) 2111104 289 874 000 -5 85 026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND MW-81) (Screen Interval in feet 300-350) 2111/04 -140 543 000 -683 048 ND<50 ND<0 50 ND<0 50 0 87 2 6 -- ND<2 0 I MW-8I (Screen Interval in feet 170-220) 5886 Page 1 of 2