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i • 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 9021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg/1) (µg11) (µg/1) (µg11) (µg11) (µg11) MW-4D continued 11/23/04 023 673 000 -650 0 48 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 14 02/23/05 023 627 000 -604 046 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 MW4S (Screen Interval in feet 5 0-15 0) 05/02/97 -0 25 7 14 000 -739 -- ND -- ND ND ND ND ND - 09/02/97 -0 25 9 34 000 -959 -220 ND - ND ND ND ND ND -- 12/01/97 -0 25 775 000 -800 1 59 ND -- ND ND ND ND ND -- 03/25/98 -025 590 000 -6 15 1 85 ND - ND ND ND ND 7 9 7 2 06/17/98 -025 6 85 000 -7 10 -095 ND ND 079 ND 067 12 12 09/01/98 -025 764 000 -789 -079 ND -- ND ND ND ND ND 8 12/03/98 -025 706 000 -7 31 058 ND -- ND ND ND ND 4 t 54 03/01/99 -025 604 000 -629 1 02 ND -- ND ND ND ND 39 3 1 04/19/99 0 45 677 000 -632 -- -- -- -- -- -- -- -- 06/01/99 045 742 000 -697 -065 ND ND ND ND ND 4 53 08/16/99 045 775 000 -730 -033 ND -- ND ND ND ND 4 3 48 11/29/99 045 760 000 -7 15 0 15 ND -- ND 2 5 ND 2 12 13 02/28/00 045 5 01 000 -456 259 ND - ND ND ND ND 3 7 4 5 05/10/00 0 45 6 73 000 -629 -172 ND ND ND ND ND 517 572 08/03/00 0 45 7 57 000 -7 12 -084 ND -- ND ND ND ND ND 3 2 11/16/00 045 698 000 -653 059 ND -- ND ND ND ND 5 4 3 5 02/05/01 045 6 84 000 -639 014 ND -- ND ND ND ND -- 3 7 04/30/01 045 6 70 000 -625 0 14 -- -- -- -- -- -- 2 89 05/07/01 045 674 0 00 -629 -004 ND -- ND ND ND ND -- 3 25 06/27/01 045 744 0 00 -699 -070 -- -- -- -- -- -- ND<5 0 -- 07/19/01 045 732 000 -687 0 12 -- -- -- -- -- -- 88 -- 5886 Page 9 of 30