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4 <br /> Table 3. Analytical Results <br /> ARCO Station 2093, Tracy, California (continued) <br /> Monitoring well <br /> number Concentrations 2n u /l <br /> and date sampled Benzene Eth (benzene Toluene Xylenes i TPH-G(a) <br /> ATR-5 <br /> 3/10/89 693 327 <5 0 7 6600 <br /> 6129/89 490 280 24 1 3 2200 <br /> 9/18/89 68 63 1 1 58 1000 <br /> 12/27/89 94 150 2 <1 2200 <br /> 4118/90 120 69 26 140 1900 <br /> 10/16/90 18 79 47 16 1000 <br /> 1/10/91 71 16 1 2 26 350 <br /> 4/10/91 46 7 <0 5 <0 5 370 <br /> 7/10/91 95 18 <0 5 1 5 1200 <br /> 9/24/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 14 1 5 1 5 <0 5 180 <br /> 4121/92 16 2 <0 5 <0 5 290 <br /> 718192 <0 5 06 <0 5 <0 5 240 <br /> 10/8/92 <0 5 �-o < <0 5 <0 5 160(d) <br /> 1/19/93 25 79 <0 5 1 3 1000 <br /> 4/15/93 15 93 <0 5 0.9 810 <br /> ATR-6 <br /> 3110189 <0 5 <0 5 <0 5 <0 5 <200 <br /> 6/21/89 <0 3 <0 3 <0 3 03 <50 <br /> 9/18/89 05 03 13 38 <50 <br /> 12/27/89 <0 3 <0 3 <0 3 04 <50 <br /> 4118/90 19 06 24 5 <50 <br /> 10/16/90 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/10/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/10/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/10/91 <0 5 <0 5 <0 5 <0 5 <50 <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 /> 4/21192 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/8/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1017/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/18/93 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/14193 75 <0.5 <0.5 <0.5 310 <br /> ATR-7 <br /> 3/10/89 <0 5 <0 5 <0 5 17 <200 <br /> 6121189 1 06 <0 3 05 <50 <br /> 9/18/89 04 <0 3 <0 3 1 1 <50 <br /> 12/27/89 10 27 09 79 90 <br /> 4118/90 61 21 26 58 <50 <br /> 10/16/90 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/10/91 6 1 8 <0 5 41 <50 <br /> 4/10/91 -- -- -- -- -- <br /> 7/10/91 -- -- -- -- -- <br />