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i • • _ <br /> Table 2 <br /> HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS <br /> February 1990 Through March 2005 <br /> Former 76 Station 6981 <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) (µg/1) (µg/l) (µg/1) (µg/l) (µg/1) (µg11) (µg/1) <br /> MW-1 i continued <br /> 05/27/98 11 23 28 94 000 -1771 258 230 -- 13 17 44 16 85 17 <br /> 07/21/98 1123 28 85 000 -1762 009 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 10/14/98 1123 2982 000 -1859 -097 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 <br /> 01/25/99 11 23 2874 000 -1751 108 ND<50 ND<O 50 ND<O 50 ND<O 50 0 82 ND<2 5 ND<2 0 <br /> 04/19/99 t 1 23 2646 000 -1523 228 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 <br /> 07/15/99 1123 2776 000 -16 53 -130 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 <br /> 10/25/99 11 23 2944 000 -1821 -- ND<50 -- ND<O 50 ND<O 50 056 099 ND<2 5 ND<2 0 <br /> 01/27/00 1123 2883 000 -1760 0 61 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 4 <br /> 06/26/00 11 23 2625 000 -1502 2 58 ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<a 500 ND<5 0 ND<2 0 <br /> 09/22/00 1123 28 76 000 -17 53 -251 ND<50 -- ND<O 50 13 ND<O 50 14 ND<2 5 ND<2 0 <br /> 12/26/00 11 23 2858 000 -1735 0 18 ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<O 50o ND<5 0 ND<2 0 <br /> 03/07/01 11 23 2825 000 -1702 033 ND<50 0 - ND<O 500 1 $7 ND<O 500 1 56 ND<5 0 ND<2 0 <br /> 06/26/01 11 23 2927 000 -1804 -102 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 09/12/01 1123 3121 000 -1998 -194 ND<50 -- ND<O 50 4 9 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 12/12/01 1123 3141 000 -20 18 -020 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<1 0 <br /> 03/20/02 1 1 23 30 19 000 -1896 1 22 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 06/06/02 1123 3063 000 -1940 -044 -- ND<50 ND<O 50 ND<O 50 ND<0 50 ND<1 0 -- ND<2 0 <br /> 09/30/02 11 23 3229 000 -21 06 -166 - ND<50 ND<O 50 ND<O 50 ND<O 50 ND<I 0 ND<2 0 <br /> 12/30/02 1123 3273 000 -21 50 -044 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<I 0 16 <br /> 03/29/03 1123 31 72 000 -2049 1 01 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 <br /> 06/25/03 1 1 23 32 07 000 -2084 -035 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 <br /> 09/24/03 11 23 3447 000 -2324 -240 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 <br /> 12/30/03 1123 33 88 000 -2265 0 59 -- __ _ __ Inaccessible <br /> 03/09/04 1123 33 00 000 -21 77 088 -- 56 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 <br /> asst Page 23 of 36 <br />