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t s Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through June 2005 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Sampled Elevation Water Thickness water to 82608 Comments Comments Xylenes 8021 B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg/1) (µg/1) W/0 (µg/1) (µg/1) (µg11) MW-5D continued 11/20/02 0 65 732 000 -667 0 16 __ ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 02/20/03 065 7 10 000 -645 022 __ -- ND<2 0 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 05/07/03 0 65 627 -- -562 0 83 __ _ ND<2 0 -- 08/04/03 0 65 763 000 -6 98 -I 36 __ - Sampled Semi-Annually ND<50 ND<5 0 ND<5 0 ND<5 0 ND 11120103 065 710 000 -645 053 02/11/04 065 6 70 000 -605 0 40 Monitored Only ND<50 ND<0 50 ND<0 50 065 2 0 ND<2 0 05/27/04 0 65 600 000 -535 070 08/30/04 065 720 000 -6 55 -1 20 ND<50 Y - --ND<0 5 ND<0 5 ND<0 5 ND<1 ND<0 5 Monitored Only � -- � 1123104 065 660 000 -5 95 060 -- 02/23/05 0 65 5 61 000 -4 96 099 ND<50 Y _- Sampled Semi-Annually -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<0 50 06/06/05 065 668 000 -6 03 -1 07 __ Sampled semi-annually MW-SS (Screen Interval in feet 5 0-I5 0) 05/02/97 -022 698 000 -7 20 i -- ND -- ND ND ND ND ND 09/02/97 -022 921 000 -943 -2 23 ND -- ND ND ND ND ND 12/01/97 -022 757 000 -7 79 1 b4 ND -- ND ND ND ND ND 03/25/98 -022 5 56 000 -578 2 01 ND -- ND ND ND ND ND ND 06/17/98 -022 660 000 -682 -104 ND -- ND ND ND ND ND ND 09/01/98 -022 748 000 -770 -088 ND -- ND ND ND ND ND ND 12/03/98 -022 6 74 000 -696 0 74 ND 03/01/99 -022 556 000 -5 78 118 ND _- ND ND ND ND 3 4 4 2 -- ND ND ND ND 39 34 04/19/99 025 642 000 -617 -039 06/01/99 0 25 724 000 -699 -082 ND `- -- -- __ -- -- ND ND ND ND ND ND 08/16/99 025 758 000 -733 -034 ND -- ND ND ND ND 64 65 11/29/99 025 739 000 -7 14 0 19 ND __ ND 1 1 ND 1 1 17 19 5886 Page 12 of 31