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i • i Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through November 2004 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 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (pg/1) (µg/1) (µg11) (µg/1) (pg/1) (µg/l) (µg11) MW-81 continued 06/01/99 -106 681 000 -787 08/16/99 -106 7 31 000 -8 37 -050 __ __ 2 6 11/29/99 -106 709 000 -8 15 022 02/28/00 -106 4 53 000 -5 59 256 53-- -- -- -- -- -- 05/10/00 -1 06 621 000 -727 -1 68 -- 08/03/00 -1 06 7 17 0 00 -823 -096 11/16/00 -106 639 000 -745 078 -- __ __ _ 2 2 02/05/01 -106 624 000 -730 0 15 05/07/01 -106 607 000 -7 13 08/20/01 -106 6 91 000 -797 -- ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/01 -106 6 63 000 -769 _ ND<50 ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 02/11/02 -1 06 634 000 -740 -- ND<50 -- ND<0 50 1 5 ND<0 50 14 ND<2 5 ND<2 0 05/02/02 -106 632 000 -738 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 08/01/02 -1 06 665 000 -771 - ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 11/20/02 -106 636 000 -742 029 ND<50 -- ND<0 50 ND<6 50 ND<0 50 ND<1 0 -- ND<2 0 02/20/03 -1 06 625 000 -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<1 0 -- < ND 2 0 02/11/04 -1 06 5 71 0 00 -677 ND<50 052 ND<0 50 10 2 9 -- ND<2 0 05/27/04 -106 - _ __ Sampled Semi-Annually 0$130104 -106 6 18 0 00 -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 MW-8S (Screen Interval in feet 5 0-15 0) seas Page 20 of 28