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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through August 2005 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water to 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (41) (41) (41) (µg/1) (41) (µg11) (µg11) (µg11) MW-6D continued 02/23/05 0 17 598 000 -581 035 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 3 2 06/06/05 0 17 6 16 000 -599 -018 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 17 08/22/05 0 17 6 53 000 -636 -037 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 0 30] MW-6S (Screen Interval in feet 5 0-15 0) 05/02/97 -037 694 000 -731 -- NO -- ND NO ND NO 120 -- 09/02/97 -037 886 000 -923 -192 NO -- NO NO ND ND ND -- 12/01/97 -037 737 000 -7 74 149 NO -- ND NO NO ND ND -- 03/25/98 -037 572 000 -609 165 ND -- NO NO NO ND 1400 1600 06/17/98 -037 652 000 -689 -080 ND -- NO NO ND ND ND 3 3 09/01/98 -037 7 17 000 -754 -065 ND -- NO ND ND NO 34 52 12/03/98 -037 667 000 -7 04 050 ND -- ND ND ND ND 6 5 3 8 03/01/99 -037 598 000 -635 069 ND -- ND NO ND NO 55 53 04/15/99 0 13 643 0 00 -630 005 -- -- -- -- -- -- -- -- 06/01/99 0 13 703 000 -690 -060 ND -- NO ND ND ND 18 20 08/16/99 0 13 721 000 -708 -018 NO -- NO ND ND ND 3 2 7 D 08/16/99 013 721 000 -708 -018 -- -- -- -- -- -- -- -- 11/29/99 0 13 7 15 000 -702 006 ND -- ND 0 7 ND ND 2 6 4 7 D 11/29/99 0 13 7 15 000 -7 02 006 -- -- -- -- -- -- -- 02/28/00 0 13 530 000 -5 17 185 NO ND ND ND NO 2100 1500 05/10/00 0 13 638 000 -625 -108 NO -- ND ND NO ND 185 226 08/03/00 0 13 708 000 -695 -070 ND -- ND NO NO NO 643 529 11/16/00 0 13 667 000 -654 041 NO -- ND NO ND ND 20 19 02/05/01 0 13 6 59 000 -646 008 NO -- ND NO ND ND 546 91 04/30/01 0 13 637 000 -624 022 -- -- -- -- -- -- 282 5886 Page 16 of 32