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Table 2 I 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 Sampled Elevation Water Thickness water in 8260$ benzene Xylenes 8Q21 B 8260B MTBE Comments Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg/1) (µg11) I1 {µg ) {µS/l} (Ag/1) {µS/1) MW-5D (Screen Interval in feet 205-240) 05/02/97 0 18 738 000 -720 -- ND -_ ND ND ND ND ND 09/02/97 0 18 960 000 -942 -2 22 ND -- -- ND ND ND ND ND 12/01/97 0 18 797 000 -779 163 ND -- _- ND ND ND ND ND 03/25/98 0 18 596 0 00 -5 78 2 01 ND -- 06/17/98 0 18 699 000 -681 -I 03 ND ND ND ND ND ND ND I -- ND 0 61 ND 055 ND ND 09/01/98 0 18 7 89 000 -771 -0 90 ND 12/03/98 D 18 7 13 000 -695 076 ND -- ND ND ND ND ND ND -- ND ND ND ND 32 27 03/01/99 0 18 597 000 -5 79 1 16 ND 04/19/99 065 681 000 _6 16 -037 - ND ND ND ND ND ND 06/01/99 065 763 000 -698 -082 ND 08/16/99 065 796 000 -731 -033 ND __ 52 ND ND ND ND ND ND ND ND ND ND ND 11/29/99 0 65 7 78 000 -7 13 0 18 ND ND ND ND ND ND 4 7 D 11/29/99 065 778 000 -7 13 0 1$ 02/28/00 0 65 4 64 000 -399 3 14 ND - 05/10/06 0 65 681 000 -616 -217 ND - ND ND ND ND ND ND 08/03100 0 65 773 000 -708 -6 92 ND __ ND ND ND ND ND ND 11/16/00 065 711 000 -646 062 ND -- ND ND ND ND ND ND -- ND ND ND ND ND ND 02/05/01 065 680 0 00 -6 15 031 ND 05/07/01 065 680 000 -6 15 000 ND ND ND ND ND ND ND -- ND ND ND ND ND ND 08/20/01 065 797 000 -732 -1 17 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 11/19/01 065 747 000 -682 050 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<1 0 02/11/02 065 708 000 -643 039 ND<50 __ ND<O 50 064 ND<O 50 ND<O 50 05/02/02 0 65 -- ND<2 0 h 7 09 0 00 -6 44 -001 ND<50 ND<O 50 ND<O 50 ND<0 50 ND<O 50 ND<5 0 ND<2 0 08/01/02 0 65 748 000 -683 -039 -_ ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 sae Page I 1 of 31