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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 in 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (40) (µg/1) (41) (µg11) (µg/1) (µg11) (µg11) MW-3 continued 08/04/03 -014 6 71 000 -685 -103 -- 110 ND<5 0 ND<5 0 ND<5 0 ND<1 0 -- 160 11/20/03 -014 6 78 000 -6 92 -0 07 -- ND<50 ND<0 50 ND<0 50 ND<0 50 NIM 0 -- 7 0 02/11/04 -0 14 597 000 -611 081 -- 79 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 89 05/27/04 -014 601 0 00 -6 I5 -004 -- 97 ND<0 50 12 ND<0 50 1 1 -- 75 i 08/30/04 -014 6 83 000 -697 -082 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<1 -- 17 11/23/04 -014 573 000 -587 1 10 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 10 02/23/05 -014 522 000 -536 051 ND<50 -- ND<0 50 ND<0 50 N1<0 50 ND<1 0 -- 070 06/06/05 -014 574 000 -588 -052 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 10 08/22/05 -014 6 16 000 -630 -042 69 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 40 MW 4D (Screen Interval in feet 22 0-25.0) 05/02/97 -004 740 000 -744 -- ND -- ND ND ND ND ND -- 09/02/97 -004 959 000 -9 63 -219 ND -- 1 ND ND ND 9 9 -- 12/01/97 -004 798 000 -802 161 ND -- 051 ND ND ND -- -- 03/25/98 -004 6 17 000 -621 181 ND -- 0 91 ND ND ND 21 17 06/17/98 -004 7 10 000 -714 -093 ND 085 0 82 ND 0 8 t 13 13 09/01/98 -004 788 000 -792 -078 ND -- ND ND ND ND 19 15 D 09/01/98 -0 04 788 000 -792 -078 -- -- -- -- -- -- -- 12/03/98 -004 728 000 -732 060 ND -- ND ND ND ND 12 14 03/01/99 -0 04 628 0 00 -632 100 ND -- ND ND ND ND 46 21 04/19/99 0 23 701 0 00 -678 -046 -- -- -- -- -- -- -- 06/01/99 023 767 000 -744 -066 ND -- ND ND ND ND 12 4 7 08/16/99 0 23 7 97 000 -774 -030 ND -- ND ND ND ND 4 6 48 D 08/16/99 0 23 797 000 -774 -030 -- -- -- -- -- -- -- -- 1 11/29/99 0 23 7 83 000 -760 0 14 ND -- ND 0 5 ND ND 4 8 78 58ss Page 7 of 32