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17, <br /> Table 4. Historical Groundwater Sample Results Continued, <br /> ARCO Facility 434, Lodi, California <br /> Monitoring well <br /> number and Concentrations mµg/1. <br /> date sampled Benzene Toluene Ethylbenzene Xvlenes TPH-G(a) MTBE <br /> 8/23/93 <0 5 <0 5 <0 5 <0 5 <50 11/16/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 3/22/94 <0 3 <0 3 <0 3 <0 5 <10 -- <br /> 6/23/94 <0 3 <0 3 <0 3 <0 5 <10 -- <br /> 9/28/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 12/19/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> Destroyed 3/95 <br /> W-7 <br /> 11/13/87 <0 5 <0 5 <0 5 <0 5 <200 -- <br /> 10/3/88 <0 5 <0 5 <0 5 <0 5 — -- <br /> 1/4/89 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 4/5/89 <0 5 <0 5 <0 5 <0 5 --7/10189 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 1016//89 <0 5 <0 5 <0 5 <0 5 -- <br /> 1/19190 12 0 5 0 6 0 4 150 <br /> 5/10/90 <0 3 <0 3 <0 3 <0 3 -- <br /> 10/04/90 1 1 <0 5 3 -- -- <br /> 1129191 l 3 <0 5 <0 5 <0 5 -- <br /> 4118/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7125/91 3 5 0 6 <0 5 <0 5 270 -- <br /> 1024/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/10/92 <0 5 <0 5 <0 5 <0 5 80 <br /> 5/12/92 <0 5 <0 5 <0 5 <0 5 70 -- <br /> 8/18/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/16/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/22/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/25/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/23/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/16/93 <0 5 <0 5 <0 5 <0 5 <50 <br /> 3/22/94(j) -- -- -- -- -- <br /> 6/23194 U) -- -- -- -- — -- <br /> 9/28/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 12/19/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 32/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/18/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/11/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/17/95 (f) -- -- -- -- -- -- <br /> 2/14/96 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/9/96(f) -- — -- -- -- -- <br />