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i i 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 Eth 1- Sampled Elevation Water Thickness water in Y Total MTBE MTBE Comments 82608 benzene Xylenes 8021 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/l) (pg/1 (1iS/I) (µg/]) (Ng/1) (11g/1) (jig/') MW-7S conttnued 05/02/02 2 89 909 0 00 -620 _0 03 ND<50 -- ND<0 50 ND<Q 50 ND<Q 50 ND<Q 50 ND<5 0 ND<2 0 08/01/02 2 89 951 000 -6 62 -042 ND<50 ND<50 ND<Q 50 ND<0 50 ND<0 50 ND<1 0 11/20/02 2 89 932 0 006 43 D 19 -- ND<2 0 ND<50 ND<0 50 ND<0 50 ND<0 50 ND 02/20/03 2 89 9 12 000 -623 020 - ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 05/07/03 289 830 -- -541 0 82 _ _ ND<2 0 08/04/03 289 958 000 -669 -128 __ "- Sampled Semi-Annually ND<50 ND<5 0 ND<5 0 ND<5 0 ND<1 0 ND<2 0 11/20/03 2 89 900 000 -6 11 058 -- 02/11/04 289 $ 74 000 -585 026 __ � -' Monitored Only ND<50 ND<0 50 ND<Q 50 ND<0 50 ND 05I27/04 2 89 878 000 -589 -0 04 08/30/04 2 89 8 93 000 -604 -0 15 ND<50 __ -" Monitored Only ND<Q 5 ND<0 5 ND<0 5 ND<IND<0 5 11/23/04 289 8 66 000 -577 027 02/23/05 2 89 806 000 -5 17 060 ND<50 Sampled Semi-Annually -- ND<0 50 ND<0 50 ND<Q 50 ND 06/06/05 2 89 849 000 -560 -043 -_ __ MW-815 -` -- Sampled semi-annually {screen Interval in feet 30 0-35 0) 04/14/99 -140 5 93 000 -733 _ ND __ 06/01/99 -1 40 653 000 7 g3 0 60 ND ND ND ND ND 7 72 - ND ND ND ND 12 96 08/16/99 -140 704 000 -844 -051 ND D 08/16/99 -140 704 000 -844 -051 ND ND ND ND 6 8 7 7 11/29/99 -140 6 81 000 -821 023 ND -- -- ND ND ND ND 91 12 02/28/00 -140 4 37 000 -577 244 ND -- ND ND ND ND ND ND 05/10/00 -140 595 000 -735 -158 Np 08/03/00 -140 6 89 000 -829 -094 ND - ND ND ND ND ND ND -- ND ND ND ND ND ND 11/16/00 -140 6 13 000 -753 076 ND A_ ND ND ND ND ND ND 02/05/01 -140 6 01 000 -741 0 12 ND ND ND ND ND ND ND 5886 Page 20 of 31 I