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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 8021E 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (pg/l) (µg/1) (µg/1) (µg/1) (µg/1) (µg/1) (pg/1) MW-2 continued 09/09/96 -030 822 000 -852 -009 ND -- ND ND ND ND 1800 -- 12/06/96 -010 674 000 -704 148 ND -- ND ND ND 6 6100 -- 03/07/97 -030 590 000 -620 0 84 ND -- ND ND ND ND 6700 -- 05/02/97 -0 81 649 000 -730 -1 10 ND -- 4 3 ND ND ND 6400 -- 09/02/97 -081 864 000 -945 -2 15 ND -- ND ND ND ND 4400 9100 12/01/97 -081 703 000 -7 84 161 ND - ND ND ND ND 3600 -- 03/25/98 -081 5 16 000 -597 187 ND -- ND 3 1 ND 2 9 1700 1600 06/17/98 -081 599 000 -680 -0 83 ND -- ND ND ND ND 2500 2100 09/01/98 -081 6 81 000 -762 -082 ND -- ND ND ND ND 2600 2900 12/03/98 -081 628 000 -709 0 53 ND -- ND ND ND ND 4800 4800 03/01/99 -081 5 23 000 -604 105 9300 -- 57 470 410 1500 710 3700 04/15/99 -030 5 98 000 -628 -- -- _- __ __ -- 06/01/99 -030 670 000 -700 -- ND - ND ND ND ND 2600 2900 08/16/99 -030 701 000 -731 -031 ND -- ND ND ND ND 10000 13000 11/29/99 -030 6 85 000 -7 15 0 00 ND ND ND ND ND 27000 32000 D 11/29/99 -030 6 85 000 -7 15 0 16 -- - -- _ _- -- 02/28/00 -030 4 11 000 -441 274 ND -- ND ND ND ND 22000 20000 05/10/00 -030 596 000 -626 -185 ND - ND ND ND ND 15900 15400 08/03/00 -030 682 000 -7 12 -086 ND ND ND ND ND 13600 15600 D 08/03/00 -030 682 000 -7 12 000 -- -- -- -- -_ -- -- -_ 11/16/00 -030 624 000 -654 0 58 ND -- ND ND ND ND 15000 19000 02/05/01 -030 606 000 -636 0 18 ND -- ND ND ND ND 5170 6300 04/30/01 -030 5 91 000 -621 0 15 -- -- - -- -- -- 3120 1 05/07/01 -030 597 000 -627 -0 06 ND -- ND ND ND ND 2840 2900 5886 Page 3 of 30