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Table 4. Historical Groundwater Sample Results Continued, <br /> ARCO Facility 434, Lodi, California <br /> Monitoring well <br /> number and Concentrations in ggfL <br /> date sampled Benzene Toluene Ethylbenzene Xylenes TPH-G(a) MTBE <br /> W-8 <br /> 11/13/87 <0 5 <0 5 <0 5 <0 5 <0 2 <br /> 2/1/88 <0 5 <0 5 <0 5 <0 5 -- <br /> 7/89 -- -- -- <br /> 10/89 -- -- -- -- <0 05 -- <br /> 1/18/90(d) -- -- -- -- -- <br /> 5/10/90 <0 3 <0 3 <0 3 <0 3 -- -- <br /> 10/05/90 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 1/29/91 <0 5 <0 5 <0 5 i -- <br /> 4/18/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/25/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/24/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/10/92 05 <0 5 <0 5 <0 5 <50 -- <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 /> 11/17/92 <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 /> 8/24/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/16/93 <0 5 <0 5 <0 5 <0 5 <50 -� <br /> 3122/94 <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 /> 3/2/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/19/95 <0 5 <0 5 <0 5 <0 5 <50 8/11/95 <0 5 <0 5 <0 5 <0 5 <50 11/17/95(f) -- -- -- -- -- <br /> 2/14/96 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/9/96(f) -- -- -- -- -- <br /> W-9 <br /> 4123190 2000 320 12 3200 -- <br /> 10/02/90 770 120 <0 5 610 -- <br /> 2///91 180 19 08 50 -- <br /> 4/16/91 440 120 14 130 830 -- <br /> 7/22/91 4100 20 <0 5 11 1400 -- <br /> 10/22/91 150 <0 5 <0 5 2 8 420 -- <br /> 2/11/92 180 <1 <1 <1 430 -- <br /> 5/12/92 14 <0 5 <0 5 <0 5 73 -- <br /> 8/18/92 14 <0 5 <0 5 <0 5 <50 -- <br /> 11/17/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/23/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/26/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/23/93 <0 5 <0 5 <0 5 <0 5 <50 V <br /> 11/17/93 <0 5 <0 5 <0 5 <0 5 <50 <br />