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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) (µ8J1) (µg11) (µg11) (µg11) (181l) (µg11) (µg11) (µg11) MW-2 continued 08/22/05 -030 636 000 -666 -063 59 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 25 MW-3 (Screen Interval in feet 5 0-25 0) -0 14 8 16 0 00 -8 30 -- 09/09/96 -- -- 09/06/96 -- -- -- -- -- 09/09/96 -014 8 10 000 -824 0 06 ND ND NO ND ND 4100 -- 12/06/96 -014 669 000 -683 141 ND -- ND ND ND ND 660 -- 03/07/97 -014 598 000 -612 071 ND -- ND ND ND ND 16000 20000 05/02/97 -065 6 60 000 -725 -1 13 ND -- 3 2 ND ND ND 7900 8000 09/02/97 -065 856 000 -921 -196 ND -- ND ND ND ND 2100 -- 12/01/97 -065 705 000 -770 151 ND -- ND ND ND ND 1700 -- 03/25/98 -065 526 000 -591 179 ND -- ND ND ND ND 8200 8500 06/17/98 -065 608 000 -673 -082 ND -- ND ND ND ND 6200 7300 09/01/98 -065 687 000 -752 -079 ND -- ND ND ND ND 6700 4500 -0 65 6 87 0 00 -7 52 -0 79 -- -- -- -- ' D 09/01/98 -- -- -- -- 12/03/98 -065 633 000 -698 0 54 ND -- ND ND ND ND 4400 5000 03/01/99 -065 555 000 -620 078 ND -- ND ND ND ND 27000 31000 04/19/99 -014 6 07 000 -621 -001 -- -- -- -- -- -- -- 06/01/99 -014 673 000 -687 -066 ND -- ND ND ND ND 36000 36000 08/16/99 -014 693 000 -707 -020 ND ND ND ND ND 20000 17000 D 08/16/99 -014 693 000 -707 -020 -- -- -- -- -- -- -- -- 11/29/99 -014 6 84 000 -698 009 ND -- ND ND ND ND 16000 21000 D 11/29/99 -014 684 000 -698 0 09 -- -- -- -- -- -- -- -- 02/28/00 -014 4 69 000 -483 2 15 ND -- ND ND ND ND 41000 42000 D 02/28100 -014 469 000 -4 83 2 15 -- -- -- -- -- -- -- -- i 05/10/00 -014 606 000 -620 -137 ND -- ND ND ND ND 101000 122000 5886 Page 5 of 32