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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 lbenzene Xylenes TPH-G(a) <br /> ATR-1 <br /> 4/23187 <0 5 <0 5 <0 5 23 <100 <br /> 12/22/87 5 9 <0 5 09 <0 5 i -- <br /> 3/24/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 6/23/88 <0 5 1 3 4 3 2 2 -- <br /> 9/29/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 2122/89 14 <0 5 <0 5 18 <100 <br /> 6/21/89 360 0 8 2 1 36 520 <br /> 9118189 250 1200 570 7100 27000 <br /> 12/27/89 3 4 <0 3 1 3 14 <50 <br /> 4/18190 21 1 5 16 16 13 <br /> 10/16/90 1 <0 5 2 2 <50 <br /> 1/10/91 2 4 <0 5 5 7 2 3 <50 <br /> 4/10/91 1 3 <0 5 4 8 <0 5 73 <br /> 7110/91 2 <0 5 47 1 7 90 <br /> 9/24191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/20192 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/8/92 <0 5 <0 5 0 6 <0 5 <50 <br /> 10/7/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/18/93(b) -- -- -- -- -- <br /> 4114/93 <0 5 <0 5 1 5 <0 5 <50 <br /> 8/30/93 <0 5 <0 5 <0 5 <0 5 <50 <br /> 10/27/93 <0 5 <0 5 <0 5 <0 5 <50 <br /> 2/18/94 0 6 1 1 0 8 17 <br /> 5120/94 0 6 0 3 1 4 <0 5 27 <br /> 10/7/94 <0 5 <0 5 <0 5 <0 5 <50 <br /> 12116/94 <0.5 <0.5 <0.5 <0.5 <50 <br /> ATR-2 <br /> 4/23/87 <05 06 <0 5 <0 5 <100 <br /> 12/22/87 <0 5 <0 5 <0 5 <0 5 -- <br /> 3/24/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 6/23/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 9/29/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 2/22/89 1 8 0 7 06 3 4 370 <br /> 6121/89 1 9 <0 3 04 <0 3 <50 <br /> 9/18/89 19 09 1 1 8 2 9 <br /> 12/27/89 3 5 <0 3 1 1 0 3 <50 <br /> 4/18/90 2 9 <0 3 <0 3 <0 3 50 <br /> 10/16/90 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/10/91 0 8 <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 /> 9/24191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23192 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/20/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/8/92 2 8 <0 5 <0 5 <0 5 <50 <br /> 10/7/92 5 7 <0 5 <0 5 <0 5 59 <br /> 1/18/93(b) -- -- -- -- -- <br /> 4/14/93 3 8 07 0 8 1 9 55 <br />