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i s 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 8260E benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg11) (go) (1g11) (µg11) (µg11) (µg11) MW-81 continued 02/20/03 -106 625 000 -731 0 11 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<t 0 -- ND<2 0 05/07/03 -106 -- -- -- -- -- -- -- -- -- -- -- -- Monitored/Sampled Semi- Annually emiAnnually 08/04/03 -106 675 000 -781 -- -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 -- ND<2 0 02/11/04 -106 5 71 000 -677 104 -- ND<50 052 ND<0 50 10 2 9 -- ND<2 0 05/27/04 -106 -- -- -- -- -- -- -- -- -- -- -- -- Sampled Serm-Annually 08/30/04 -106 6 18 000 -724 -- 71 -- ND<0 5 ND<0 5 ND<0 5 ND<l -- ND<0 5 11/23/04 -1 06 -- -- -- -- -- -- -- -- -- Monitored and Sampled Semi -- Annually 02/23/05 -106 549 000 -655 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 21 06/06/05 -106 592 000 -698 -043 -- -- -- -- -- -- -- -- Sampled semi-annually 08/22/05 -1 06 669 000 -775 -077 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 0 20J MW-8S (Screen Interval in feet 5 0-15 0) 04/14/99 -100 6 23 000 -723 -- ND -- ND ND ND ND -- 169 06/01/99 -100 686 000 -786 -063 ND -- ND ND ND ND ND ND 08/16/99 -1 00 736 000 -836 -050 ND -- ND ND ND ND ND ND 11/29199 -100 7 14 000 -814 022 ND -- ND ND ND ND ND ND 02/28/00 -100 458 000 -558 256 ND -- ND ND ND ND ND ND D 02/28/00 -100 458 000 -558 256 -- -- -- -- -- -- -- 05/10/00 -100 625 000 -725 -167 ND -- ND ND ND ND ND ND 08/03/00 -100 721 000 -821 -096 ND -- ND ND ND ND ND ND 11/16/00 -100 643 000 -743 0 78 ND -- ND ND ND ND ND ND 02/05/01 -100 626 000 -726 0 17 ND -- ND ND ND ND ND ND 05/07101 -100 605 000 -705 021 ND -- ND ND ND ND ND ND 1 08/20/01 -100 685 000 -785 -080 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 5886 Page 23 of 32