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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through August 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 802IB 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg11) (µg11) (µg11) (µg11) (µg/1) (µg/1) MW-8I continued 05/02/02 -106 632 000 -738 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<S 0 ND<2 0 08/01/02 -106 665 0 00 -771 -- ND<50 -- ND<a 50 ND<0 50 ND<0 50 ND 11/20/02 -106 636 000 -742 029 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 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 -7 81 -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 -- ND<2 0 02/11/04 -106 5 71 000 -6 77 -- -- 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 MW-8S (Screen Interval In feet 5 0-15 0) 04/14/99 -100 623 000 -723 -- -- -- -- -- -- -- 169 06/01/99 -100 6 86 000 -786 -- -- -- -- - -- -- -- 08/16/99 -100 736 000 -836 -050 -- -- -- -- - -- -- -- 11/29/99 -100 7 14 000 -8 14 0 22 - -- - -- -1 00 4 58 0 00 -5 58 2 56 -- -- -- - o2/2s/ao -- -- -- -- 05/10/00 -100 625 000 -725 -167 -- -- -- -- -- -- I 08/03/00 -100 721 000 -821 -096 -- -- - -- -- -- - 1 L/16/00 -100 643 000 -7 43 078 -- -- -- -- -- -- -- -- -1 00 6 26 0 00 -7 26 0 17 -- -- -- -- 02/05/01 -- -- -- 05/07/01 -100 6 05 000 -705 -- -- -- -- -- -- - I 08/20/01 -100 6 85 000 -785 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/01 -100 666 000 -766 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<50 ND<1 0 02111102 -100 619 000 -739 -- ND<50 -- ND<0 50 13 ND<0 50 1 1 ND<2 5 ND<2 0 1 5886 Page 20 of 27