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0 Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through February 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 in 8260B benzene Xylenes 8021B 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (µg11) (µg11) (µg/1) (µg11) (µg/1) (µg11) MW-6S continued 05/07/03 0 13 608 000 -595 1 02 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 08/04/03 0 13 702 000 -689 -094 -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 -- ND<2 0 11/20/03 013 662 000 -649 040 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 02/11/04 0 13 635 000 -622 027 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 05/27/04 0 13 655 000 -642 -020 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 - ND<0 50 i 08/30/04 0 13 637 000 -624 0 18 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<1 -- ND<0 5 11/23/04 0 13 629 000 -616 008 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 02/23/05 0 13 5 93 000 -5 80 036 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 - 1 0 MW-71) (Screen Interval in feet 23 0-25 5) 05/02/97 226 927 000 -701 -- ND ND ND ND ND ND -- 09/02/97 226 1131 000 -905 -204 ND -- ND ND ND ND ND - 12/01/97 226 976 000 -750 155 ND -- ND ND ND ND ND -- 03/25/98 226 781 000 -555 195 ND - ND ND ND ND ND ND 06/17/98 226 8 82 000 -656 -101 ND -- ND ND ND ND ND ND 09/01/98 226 964 000 -7 38 -082 ND -- ND ND ND ND ND ND 12/03/98 226 895 000 -669 069 ND -- ND ND ND ND ND 3 8 03/01/99 226 794 000 -568 101 ND -- ND ND ND ND ND ND 04/15/99 276 865 000 -5 89 -- - -- -- -- -- -- -- 06/01/99 276 947 000 -671 -- ND -- ND ND ND ND ND ND 08/16/99 276 969 000 -693 -022 ND - ND ND ND ND ND ND 11/29/99 276 957 000 -681 012 ND - ND ND ND ND ND ND 02/28/00 276 684 000 -409 273 ND - ND ND ND ND ND ND 05/10/00 276 878 000 -602 -194 ND -- ND ND ND ND ND ND 08/03/00 276 941 000 -665 -063 ND - ND ND ND ND ND ND 5886 Page 17 of 30