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Table 4. Historical Groundwater Sample Results Continued, <br /> ARCO Facility 434, Lodi, California <br /> 1' Monitorma well <br /> number and Concentrations in µ;/1, <br /> date sampled Benzene Toluene Ethylbenzene Xylenes TPH-G(a) MTBE <br /> 10/04/90 <0 5 <0 5 <0 5 <0 5 <br /> 1/31/91 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 4118/91 9 2 <0 5 <0 5 <0 5 <50 <br /> 7/25/91 4 9 0 6 <0 5 <0 5 110 <br /> I0/24/91 1 1 <0 5 <0 5 <0 5 <50 -- <br /> 2/10/92 <0 8 <0 5 <0 5 <0 5 60 -- <br /> 5/12/92 <0 5 <0 5 <0 5 <0 5 <50 -- <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 /> 2122193 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/25193 <0 5 <0 5 <0 5 <0 5 <50 <br /> 8/23193 <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 <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 1 1 <0 5 <0 5 <50 -- <br /> 12/19/94 2 2(1) <0 5 <0 5 <0 5 <50 -_ <br /> 3/2195 <0 5 <0 5 <0 5 <0 5 <50 <br /> 5118/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/10/95 <0 5 <0 5 <0 5 <0 5 <50 <br /> 11/17/95 <0 5 <0 5 <0 5 <0 5 <50 <3 <br /> 2/14/96 065 1 7 <0 5 12 55 -- <br /> 5/9/96 2 8 4 4 098 6 4 <50 -- <br /> W-6 <br /> 7/23/87 <0 5 <0 5 <0 5 <0 5 <900 <br /> 11/13/87 <0 5 <0 5 <0 5 <0 5 -- <br /> 6/24/88 <0 5 <0 5 <0 5 <0 5 <br /> 10/3/88 <0 5 <0 5 <0 5 <0 5 <br /> 114189 <0 5 <0 5 <0 5 <0 5 <br /> 4/4/89 <0 5 <0 5 <0 5 <0 5 -- .- <br /> 7/10189 <0 5 <0 5 <0 5 <0 5 <br /> 10/16/89 <0 5 <0 5 <0 5 <0 5 -- <br /> I/19/90 l 8 5 6 3 7 31 390 — <br /> 5/10/90 0 3 1 3 0 4 4 2 -- <br /> 10/04/90 10 13 1 <br /> 1/30/91 <0 5 <0 5 <0 5 <0 5 -- <br /> 4/18/91 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/25191 <0 5 <0 5 <0 5 <0 5 <50 <br /> 10/23/91 <0 5 <0 5 <0 5 <0 5 <50 =_ <br /> 2/10/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 5/12/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8118192 <0 5 <0 5 <0 5 <0 5 <50 <br /> 11116/92 <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 />