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s s • Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through August 2005 76 Station 5886 Date TQC 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) (µ911) (µ9n) (µg11) (µg/1) {µg11) (µg/1) (µg11) (µg11) MW4D continued 08/04/03 023 761 000 -738 -113 -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 -- 3 1 11/20/03 023 7 12 000 -6 89 049 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 3 3 02/11/04 0 23 6 86 000 -663 026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 05/27/04 023 695 000 -672 -009 -- ND<50 ND<0 50 2 3 ND<0 50 25 -- 21 08/30/04 0 23 721 000 -698 -026 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<l 4 3 11/23/04 023 673 000 -650 048 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 14 02/23/05 0 23 627 000 -604 046 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 06/06/05 0 23 6 85 000 -6 62 -058 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 50 08/22/05 023 738 000 -7 15 -053 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 0 153 MW4S (Screen Interval in feet.5.0-15 0) 05/02/97 -025 7 14 000 -739 -- ND -- ND ND ND ND ND -- 09/02/97 -025 934 000 -959 -2 20 ND -- ND ND ND ND ND -- 12/01/97 -025 7 75 000 -800 159 ND -- ND ND ND ND ND -- 03/25/98 -025 590 000 -6 15 185 ND ND ND ND ND 7 9 72 06/17/98 -025 685 000 -710 -095 ND -- ND 079 ND 067 12 12 09/01/98 -025 764 000 -789 -079 ND -- ND ND ND ND ND 8 12/03/98 -025 706 000 -731 058 ND -- ND ND ND ND 41 5 4 03/01/99 -025 6 04 000 -629 102 ND -- ND ND ND ND 3 9 3 1 04/19/99 045 6 77 000 -632 -003 -- -- -- -- -- -- -- -- 06/01/99 045 742 000 -697 -065 ND -- ND ND ND ND 4 5 3 08/16/99 045 775 000 -730 -033 ND -- ND ND ND ND 4 3 48 11/29/99 045 760 000 -715 0 15 ND -- ND 25 ND 2 12 13 02/28/00 045 501 000 -456 259 ND -- ND ND ND ND 3 7 4 5 II 05/10/00 045 673 000 -628 -172 ND -- ND ND ND ND 5 17 572 5886 Page 9 of 32