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i • • Y Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 2004 Former BP Oil 11192 Date TOC Depth to LPH Ground- Change TPtl-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE TBA Comments Sampled Elevation Water Thickness water to 8260B benzene Xylenes 8021B 8260B 8260B Eievatlon Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (pg/1) (pg/1) (µg11) (11811) (µg/1) (pg/1) (pgll) Mei'-1 05/01/90 5 52 2511 0 00 -19 59 - 140 -- 1 ND ND -- ND - 08/05/91 5 52 - -- - Dry 12/09/91 552 - - -- -- - - - -- - - -- Dry 03/09/92 5 52 - -- - -- Dry 06/19/92 5 52 -- - -- -- -- -- - - - Dry 09/18/92 5 52 -- -- _- -- -- -- Dry 12/09/92 5 52 - -- -- -- - - -- __ __ __ Dry 02/15/95 5 52 - - - - -- -- 04/21/95 5 52 23 82 000 -18 30 000 820 -- 27 2 6 3 1 5 6 - D 04/21/95 5 52 23 82 000 -1830 720 -- 31 2 9 3 5 5 7 - - 07/19/95 5 52 2292 000 -1740 0 90 620 40 2 2 4 2 3 - P 10120/95 5 52 - - - - 440 -- 16 051 0 73 22 6 4 - -- Pre-purge D 10/20/95 5 52 - -- - 480 -- 17 ND<0 50 ND<0 50 1 5 ND<5 0 - Pre-purge 10/20/95 5 52 23 32 000 -17 80 000 450 30 067 0 6 1 5 3 - D 10/20/95 5 52 23 32 000 -17 80 000 460 29 091 052 1 5 ND<5 0 - P 04/23/96 552 - -- ND<500 - 11 ND<0 5 ND<0 5 ND<0 5 49 - Pre-purge 04/23/96 552 1987 000 -1435 3 45 ND<500 - 10 ND<0 5 ND<0 5 ND<0 5 42 - 07/12/96 552 2099 000 -1547 -1 12 - -- -- - - -- 10/18/96 5 52 20 16 000 -1464 0 83 160 -- ND<0 5 ND<1 0 ND<l 0 ND<1 0 ND<10 02/26/98 552 11 90 000 -638 926 470 -- 1 6 ND<1 0 ND<1 0 ND<l 0 370 07/07/98 5 52 11 40 0 00 -5 88 050 800 ND<0 5 ND<1 0 ND<1 0 ND<1 0 700 -- -- 01/19/99 552 1347 000 -795 -207 730 ND<1 0 ND<1 0 ND<1 0 ND<1 0 840 - -- 07/14/99 552 12 27 000 -6 75 1 20 3000 ND<1 0 ND<1 0 ND<1 0 ND 10/07/99 5 52 1390 000 -838 4000 - ND<1 0 ND<1 0 ND<1 0 ND<1 0 2500 - 11192 Page 1 of 18