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Table 2 . i 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 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (Ng/l) (µg/i) (pg/1) (pg/1) (µg/1) (µg11) (41) (µg11) MW-7S continued 11/29/99 289 966 000 -677 0 14 02/28/00 289 691 000 -4 02 2 75 05/10/00 2 89 8 85 000 -596 -194 -- -- -- -- -- _ __ 08/03/00 2 89 9 52 000 -663 -067 -- -- - -- - -- _- __ 11/16/00 289 906 000 -6 17 046 -- -- -- -- -- -- _- _ 02/05/01 289 896 000 -607 0 10 05/07/01 289 875 000 -5 86 08/20/01 2 89 998 000 -709 - ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/01 2 89 947 000 -6 58 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 02/11/02 2 89 9 06 000 -6 17 - ND<50 - ND<0 50 0 6 ND<0 50 ND<0 50 ND<2 5 ND<2 0 05/02/02 2 89 909 000 -620 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 08/01/02 2 89 951 000 -662 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND 11/20/02 289 932 000 -6 43 0 19 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<t 0 - ND<2 0 02/20/03 289 9 12 000 -623 020 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 05/07/03 2 89 830 -- -541 0 82 -- -- -- __ __ __ __ __ Sampled Serra-Annually 08/04/03 289 958 000 -669 -1 28 -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND 11120/03 2 89 900 000 -611 058 - -- -- __ __ __ __ Monitored Only 02/11/04 289 874 000 -585 026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 05/27104 2 89 8 78 000 -5 89 -004 -- -- -- _- __ __ __ Monitored Only 08/30/04 2 89 8 93 000 -6 04 -0 Is ND<50 - ND<0 5 ND<0 5 ND<0 5 ND 11123104 2 89 8 66 000 -577 027 -- -- -- _ _ _ Sampled Semi-Annually MW-81) (Screen Interval in feet 30 0-35 0) 04/14/99 -140 5 93 000 -733 -- -- -- -- - -- __ 7 72 06/01/99 -140 653 000 -793 - -- -- -- -- 12 9 6 5886 Page 18 of 28