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Table 3. Analytical Results for <br /> ARCO Facility 2093, Tracy, California <br /> Monitoring well Concentrations in L <br /> number and Methyl <br /> date sampled Benzene Toluene Eth (benzene Xylenes TPH-G(a) Tert-Butyl Ether <br /> ATRA <br /> 4/23/87 <0 5 <0 5 <0 5 23 <100 -- <br /> 12/22/87 5 9 <0 5 0 9 <0 5 -- <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 /> 2/22/89 1 4 <0 5 <0 5 1 8 <100 -- <br /> 6/21/89 360 0 8 2 1 36 520 -- <br /> 9/18/89 250 1200 570 7100 27000 -- <br /> 12/27/89 3 4 <0 3 1 3 1 4 <50 <br /> 4/18/90 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 13 <0 5 4 8 <0 5 73 <br /> 7/10/91 2 <0 5 4 7 17 90 -- <br /> 9/24/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 4/20/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 718/92 <0 5 <0 5 0 6 <0 5 <50 =- <br /> 1017192 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/18/93(b) -- -- -- __ -- <br /> 4/14/93 <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 /> 5/20/94 0 6 0 3 1 4 <0 5 27 -- <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 1 <0 5 <50 -- <br /> 4/26/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/27/95 (c) -- -- -- -- -- _ <br /> 10/27/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/12/96 <0 5 <0 5 2 2 <0 5 120 -- <br /> 4/18/96(c) -- -- -- -- -- <br /> 7/18/96 <0 5 <0 5 <0 5 <0 5 <50 <5 <br /> ATR-2 <br /> 4/23/87 <0 5 0 6 <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 0 6 3 4 370 -- <br /> 6/21/89 1 9 <0 3 0 4 <0 3 <50 == <br /> 9118/89 1 9 0 9 1 1 8 2 9 <br /> 33151TABLE312093AUG6 XL5 <br />