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i Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through March 2005 Former 76 Station 6981 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (Pg/1) (Pg/1) (Pg/1) (41) (Pg/1) (Pg/1) (n1l) (µg11) MW-2 continued 10/14/98 11 56 2926 000 -1770 -0 95 2900 -- 620 17 36 56 380 190 01/25/99 11 56 2843 000 -1687 0 83 2200 -- 610 21 24 72 270 170 04/19/99 11 56 26 10 000 -1454 233 1700 -- 440 20 18 57 310 180 07/15/99 11 56 2737 000 -15 81 -127 620 -- 130 ND<2 5 5 1 17 120 180 10/25/99 11 56 2907 000 -1751 -- 710 120 21 6 29 240 200 01/27/00 11 56 2853 000 -1697 054 490 -- 62 20 5 2 24 170 140 06/26/00 11 56 25 84 000 -1428 2 69 489 -- 38 3 ND<0 500 532 107 879 09/22/00 1156 2901 000 -1745 -3 17 8000 -- ND<20 ND<20 ND<20 370 120 100 12/26/00 I 1 56 2890 000 -1734 0 11 5270 -- 47 6 10 7 ND<10 0 217 ND<100 785 03/07/01 11 56 2859 000 -1703 031 861 -- 428 259 ND<2 50 17 67 1 73 2 06/26/01 11 56 2965 000 -1809 -106 400 -- 27 2 1 1 1 10 53 47 09/12/01 11 56 31 53 000 -1997 -1 88 360 - 25 16 ND<O 50 8 4 51 62 12/12/01 11 56 31 78 000 -2022 -025 700 -- 77 ND<2 0 ND<2 0 23 75 94 03/20/02 11 56 3055 000 -1899 123 650 -- 120 2 1 ND<2 0 17 100 78 06/06/02 11 56 3102 000 -1946 -047 -- 390 53 1 1 ND<O 50 3 6 -- 56 09/30/02 11 56 3354 000 -21 98 -252 -- 10000 900 57 490 4 800 -- 60 12/30/02 11 56 3305 000 -21 49 049 -- 4100 460 ND<2 5 35 250 -- 49 03/29/03 11 56 31 99 000 -2043 1 06 -- 960 43 0 87 5 7 24 -- 31 06/25/03 11 56 3247 000 -2091 -048 -- 410 10 ND<O 50 ND<O 50 3 1 -- 19 09/24/03 11 56 3478 000 -23 22 -2 31 -- 2100 81 ND<2 5 70 97 -- 10 12/30/03 11 56 3423 000 -2267 055 -- 370 12 055 ND<0 50 2 1 -- 5 0 03/09/04 1156 3334 000 -21 78 089 -- 200 9 2 ND<O 50 ND<O 50 3 3 -- 3 2 06/16/04 11 56 3401 000 -2245 -067 - 240 6 6 ND<O 50 ND<O 50 2 0 1 3 09/20/04 11 56 36 93 000 -25 37 -292 83 -- 4 4 ND<O 50 ND<O 50 ND<1 0 -- 063 sssi Page 5 of 36