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Table 3. Analytical Results <br /> ARCO Facility 2093, Tracy, California <br /> Monitoring well <br /> number and Concentrations in u /l <br /> date sampled Benzene Toluene Eth (benzene Xylenes TPH-G (a) <br /> ATR-8 <br /> 8/25/91 110 <0 5 130 98 2700 <br /> 9/25/91 95 <0 5 51 97 1400 <br /> 1/23192 25 <0 5 <0 5 <0 5 <50 <br /> 4/21192 14 09 14 93 140 <br /> 7/8/92 40 <0 5 92 08 87 <br /> 10/8192 78 32 11 88 140 <br /> 1/19/93 140 17 11 34 980 <br /> 4/15/93 42 <0 5 46 49 110 <br /> 8131/93 150 15 41 71 700 <br /> 10/27/93 620 2100 2800 8700 52000 <br /> 2/17/94(c) -- -- -- -- -- <br /> 5/20/94(c) -- -- <br /> 10/7/94(c) -- -- -- -- <br /> 12/16/94(c) -- -- -- -- -- <br /> 02/28/95 (c) -- -- -- -- -- <br /> 4l26/95(c) -- -- -- -- -- <br /> ATR-9 <br /> 10/16/90 <05 <0 5 <0 5 <0 5 <50 <br /> 1/10/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/10191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/10191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 9/25/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/21/92 <05 <0 5 <0 5 <0 5 <50 <br /> 7/8/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 10/7/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/18/93 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4114193 <0 5 <0 5 <0 5 <0 5 <50 <br /> 8/30/93 <05 <0 5 <0 5 <0 5 <50 <br /> 10/27/93 <0 5 <0 5 <0 5 07 <50 <br /> 2118/94 <0 3 04 <0 3 <0 5 <10 <br /> 5120/94 <0 3 <0 3 <0 3 <0 5 <10 <br /> 10/7/94 <0 5 <0 5 <0 5 <0 5 <50 <br /> 12/16/94 <0 5 <0 5 <0 5 <0 5 <50 <br /> 2/28/95 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/25195 <0 5 <0.5 <0.5 <0 5 <50 <br /> ATR-10 <br /> 10/16/90 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/10/91 <05 <0 5 <0 5 <0 5 <50 <br /> 4/10191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/12/91 <0 5 <0 5 <0 5 <0 5 <50 <br />