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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through November 2004 76 Station 5886 Date TOG Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021E 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/l) (µg11) (µg/l) (µg11) (µg/1) (µg/l) (µg11) (µg11) MW-3 continued 02/11/02 -014 634 000 -648 -049 ND<1000 ND<10 ND<10 ND<10 ND<10 5000 5000 03/21/02 -014 6 17 000 -631 0 17 __ __ __ 9000 -- 05/02/02 -014 631 000 -645 -0 14 ND<500 ND<5 0 ND<5 0 ND<5 0 ND<5 0 8600 6500 08/01/02 -014 667 0 00 -681 -- ND<1000 - ND<10 ND<10 ND<10 ND<20 -- 1200 11/20/02 -014 6 53 000 -667 0 14 ND<250 -- ND<2 5 ND<2 5 ND<2 5 ND<5 0 -- 280 02/20/03 -0 14 636 000 -650 0 17 140 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 150 05/07/03 -014 568 000 -5 82 068 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND 08/04/03 -014 671 000 -6 85 -103 -- 110 ND<5 0 ND<5 0 ND<5 0 ND 11/20/03 -0 14 6 78 000 -692 -007 __ ND<50 ND<0 50 ND<0 50 ND<0 50 ND 02/11/04 -014 597 000 -6 11 081 -- 79 ND<0 50 ND<0 50 ND<0 50 ND<1 0 - 89 05/27/04 -014 601 000 -6 15 -004 - 97 ND<0 50 1 2 ND<0 50 1 1 -- 75 08/30/04 -014 6 83 000 -697 -082 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<1 l 7 11/23/04 -014 573 000 -5 87 1 10 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 - 10 MW-41) (Screen Interval in feet 22 0-25 0) 05/02/97 -004 740 000 -744 -- 09/02/97 -004 959 000 -9 63 -2 19 - 1 -- -- -- 9 9 - 12/01/97 -0 04 7 98 000 -8 02 161 -- - 0 51 -- -- _- 03/25/98 -004 6 17 000 -621 1 81 - -- 091 -- -- -- 21 17 06/17/98 -004 7 10 000 -7 14 -0 93 -- 0 85 0 82 -- 0 81 13 13 09/01/98 -0 04 788 000 -792 -078 _- _ -- __ _ __ 19 15 12/03/98 -004 728 000 -7 32 060 -- -- -- -- 12 14 03/01/99 -0 04 6 28 000 -632 1 00 -- __ __ __ _ 4 6 2 1 04/19/99 023 701 000 -678 -- 06101/99 -06/01/99 0 23 767 000 -744 -066 -- -- __ -- 12 4 7 seas Page 6 of 28