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0 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 to 8260B benzene Xylenes 802113 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (1g11) (µg11) (µg/1) (µg11) (14811) (Pg/l) 410) 41g11) MW-81 continued 11/20/02 -106 636 000 -742 029 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 02/20/03 -106 625 000 -731 0 11 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 05/07/03 -106 -- - __ _ __ __ __ __ Monitored/Sampled Semi- Annually 08/04/03 -106 675 000 -781 __ ND<50 ND<5 0 ND<5 0 ND<5 0 ND<l 0 -- ND<2 0 02/11/04 -106 5 71 000 -677 -- -- ND<50 052 ND<0 50 10 2 9 -- ND<2 0 05/27/04 -106 -- -- -- -- __ __ __ __ __ __ Sampled Semi-Annually 08/30/04 -106 6 18 000 -724 -- 71 -- ND<0 5 ND<0 5 ND<0 5 ND<1 -- ND<0 5 11/23/04 -106 -- -- -- -- __ __ __ __ __ Monitored and Sampled Semi Annually 02/23/05 -106 549 0 00 -6 55 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 - 2 1 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 6 86 000 -786 __ ND -- ND ND ND ND ND ND 08/16/99 -100 736 000 -836 -050 ND -- ND ND ND ND ND ND 11/29/99 -100 7 14 000 -8 14 022 ND -- ND ND ND ND ND ND 02/28/00 -100 458 000 -5 58 000 ND -- ND ND ND ND ND ND D 02/28/00 -100 4 58 000 -5 58 256 05/10/00 -100 625 000 -725 -167 ND ND ND ND ND ND ND 08/03/00 -100 721 000 -8 21 -096 ND -- ND ND ND ND ND ND 11/16/00 -100 643 0 00 -743 078 ND -- ND ND ND ND ND ND 02/05/01 -100 626 0 00 -726 0 17 ND -- ND ND ND ND ND ND 05/07/01 -100 605 000 -705 -- ND -- ND ND ND ND ND ND 08/20/0[ -100 6 85 000 -7 85 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/0) -100 666 000 -766 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 5886 Page 22 of 30