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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through November 2004 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 in 8260E benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/l) (µg11) (µg/1) W/1) (µg11) (µg11) (µg1[) MW-61) continued 08/01/02 0 17 7 05 000 -688 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 11/20/02 0 17 691 000 -6 74 0 14 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 02/20/03 0 17 6 74 000 -6 57 0 17 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 05/07/03 0 17 6 11 000 -594 063 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 __ ND<2 0 08/04/03 0 17 7 06 000 -689 -095 ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 ND<2 0 11/20/03 0 17 661 000 -644 045 88 3 3 I 0 21 6 9 - ND<2 0 02/11/04 0 17 640 000 -623 0 21 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 05/27/04 0 17 6 64 000 -647 -024 -- ND<50 ND<0 50 20 ND<0 50 17 -- ND<0 50 08/30/04 0 17 642 000 -625 022 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<l -- ND<0 5 11/23/04 0 17 6 33 000 -616 009 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 MVV-6S (Screen Interval to feet 5 0-15 0) 05/02/97 -037 6 94 0 00 -7 31 -- -- -- -- 120 -- 09/02/97 -037 8 86 000 -923 -192 12/01/97 -037 737 000 -774 149 03/25/98 -037 5 72 000 -6 09 165 -- -- -- - - 1400 1600 06/17/98 -037 6 52 000 -689 -080 -- _ _ _- 3 3 09/01/98 -037 7 17 000 -754 -0 65 -- -- - -- 34 52 12/03/98 -037 667 000 -7 04 050 -- -- -- -- -- - 65 3 8 03/01/99 -037 5 98 000 -635 069 - -- -- -- 55 53 04/15/99 0 13 6 43 000 -630 - 06/01/99 0 13 7 03 000 -690 -- -- 18 20 08/16/99 0 13 721 000 -708 -0 18 -- -- -- -- 3 2 7 11/29/99 0 13 7 15 000 -7 02 006 - - -- 0 7 - 2 6 4 7 02/28/00 0 13 5 30 000 -5 17 1 85 -- -- -- -- -- 2100 1500 5886 Page 14 of 28