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r <br /> 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 8260E benzene Xylenes 8021B 8260B <br /> Elevation Elevation <br /> (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg/1) (µg11) (µg/1) (µg/1) (µg/1) (µg/1) <br /> MW-6 continued <br /> 09/12/01 1143 3059 000 -19 16 -189 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 <br /> 12112/01 1143 30 86 000 -1943 -027 ND<50 ND<0 50 12 ND<0 50 17 ND<5 0 ND<I 0 <br /> 03/20/02 1143 29 67 000 -1824 l 19 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 <br /> 06/06/02 1143 30 10 000 -1867 -043 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<I 0 -- ND<2 0 <br /> 09/30/02 11 43 3256 000 -21 13 -246 -- 190 7 6 10 6 2 27 ND<2 0 <br /> 12/30/02 1143 3206 000 -2063 0 50 - ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 <br /> 03/29/03 1 1 43 31 16 000 -19 73 090 -- ND<50 ND<0 50 0 71 ND<0 50 ND<1 0 -- ND<2 0 <br /> 06/25/03 1143 31 48 000 -2005 -032 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 <br /> 09/24/03 1143 3282 000 -21 39 -134 - ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 <br /> 12130103 it 43 33 26 000 -2183 -044 -- ND<50 ND<0 50 1 1 ND<0 50 1 8 -- ND<2 0 <br /> 03/09/04 1143 3241 000 -2098 0 85 -- ND<50 ND<0 50 ND<0 50 ND<0 50 1 5 ND<2 0 <br /> 06/16/04 1143 3306 000 -2163 -065 55 ND<0 50 0 85 ND<0 50 12 -- ND<0 50 <br /> 09/20/04 1143 3593 000 -2450 -287 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 50 <br /> 12/30/04 1143 35 30 000 -23 87 0 63 61 0 55 051 1 2 57 - ND<0 50 <br /> 03/24/05 1143 33 91 000 -2248 139 ND<50 -- ND<0 50 054 ND<0 50 ND<I 0 -- ND<0 50 <br /> MW-7 (Screen Interval in feet 49 0-69 0) <br /> 04/16/92 -- -- - -- -- <br /> 07/30/92 -- -- -- -- - 950 -- 320 19 5 7 25 -- -- <br /> 10/21/92 -- -- -- -- -- 240 35 2 6 1 9 3 2 -- -- <br /> 01/13/93 -- -- -- -- -- 2400 1000 95 35 120 -- -- <br /> 04/26/93 1182 5108 000 -3926 -- 500 -- 170 ND<2 5 ND<2 5 t0 -- -- <br /> 07/26/93 11 82 S2 11 000 -4029 -1 03 3800 -- 1200 59 92 140 -- -- <br /> 10/20/93 11 82 S263 000 -4081 -052 3500 -- 690 34 44 53 -- -- <br /> 01/17/94 It 82 5010 000 -3828 253 15000 -- 4800 460 290 620 -- -- <br /> 6981 Page 14 of 36 <br />