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Table 2 <br /> HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS <br /> May 1990 Through May 2004 <br /> Former BP Oil 11192 <br /> Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments <br /> Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260B <br /> Elevation Elevation <br /> (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (µg/1) (µg11) (µg11) (µg11) (Pg/1) (µg/1) <br /> MW-1 <br /> 08/05/91 5 52 - -- -- -- -- -- - -' -- Dry <br /> 12/09/91 552 -- -- -- -- '- ._ `- -- -` Dry <br /> 03/09/92 5 52 -- -- - -- -- -- -- -- -- -' Dry <br /> 06/19/92 5 52 -- -- -- -- -- -- -- -- -- -' -- Dry <br /> 09/18/92 5 52 -- - -- -- - -- -- - -- - -- DD' <br /> 12/09/92 552 -- -- -- -- -- -- -' -- DD' <br /> 02/15/95 5 52 -- -- -- -- -- -- -- -- -- -- <br /> 04/21/95 5 52 23 82 000 -18 30 -- 820 -- 27 2 6 3 1 56 -- - <br /> 07/19/95 5 52 2292 000 -1740 090 620 -- 40 2 2 4 2 3 -- -- <br /> 10/20/95 5 52 23 32 000 -1780 -- 450 - 30 067 0 6 1 5 3 -- <br /> 04/23/96 5 52 1987 0 00 -1435 3 45 ND<500 - 10 ND<0 5 ND<0 5 ND<0 5 42 - <br /> 07/12/96 5 52 2099 000 -15 47 -1 12 -- -- -- -- -- -- -- -- <br /> 10/18/96 5 52 2016 000 -14 64 0 83 160 ND<0 5 ND<1 0 ND<1 0 ND<l 0 ND<10 -- <br /> 02/26/98 5 52 1190 000 -638 826 470 -- 16 ND<l 0 ND<l 0 ND<1 0 370 -- <br /> 07/07/98 5 52 1140 0 00 -5 88 050 800 - ND<0 5 ND<l 0 ND<1 0 ND<1 0 700 - <br /> 01/19/99 5 52 1347 0 00 -795 -207 730 -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 840 - <br /> 07/14/99 5 52 1227 0 00 -675 120 3000 -- ND<I 0 ND<1 0 ND<1 0 ND<1 0 3300 -- <br /> 10/07/99 5 52 1390 000 -8 38 -- 4000 -- ND<l 0 ND<1 0 ND<1 0 ND<l 0 2500 -- <br /> 01/20/00 5 52 1419 000 -867 -029 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 2400 -- <br /> 04/11/00 5 52 1483 000 -931 -064 1100 ND<0 5 ND<0 5 ND<0 5 ND<0 5 3700 <br /> 07/14!0 -- <br /> 0 5 52 11 72 0 00 -6 20 3 11 510 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 1300 -- <br /> 10/26/00 5 52 13 38 000 -786 -166 230 057 ND<O 5 ND<0 5 076 3000 - <br /> 01/16/01 5 52 1325 000 -7 73 0 13 230 0 688 ND<0 5 ND<0 5 ND<0 5 271 -- <br /> 04112/01 5 52 1181 000 -629 1 44 650 ND<0 5 ND<0 5 ND<0 5 ND<1 5 921 <br /> 07/23/01 5 52 1335 000 -783 -1 54 1400 - ND<0 5 ND<0 5 ND<0 5 ND<1 5 1610 -- <br /> 11192 Page 1 of 14 <br />