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Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 434, Lodi, California <br /> Top-of-casing Depth-to- Water-level Change since <br /> Well number elevation, water, elevation, last measurement, Concentrations in L <br /> and date in feet(a) in feet in feet in feet Benzene Toluene Eth /benzene Xylenes TPH-G MBTE <br /> 8/18/92 66.12 -24.35 -5.13 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/16/92 65.90 -24.13 0.22 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 2/22/93 63.58 -21.81 2.32 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 5/25/93 63.02 -21.25 0.56 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8/23193 67.36 -25.59 -4.34 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/16/93 64.22 -22.45 3.14 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 3/22/94 60.29 -18.52 3.93 <0.3 <0.3 <0.3 <0.5 <10 -- <br /> 6123194 63.71 -21.94 -3.42 <0.3 <0.3 <0.3 <0.5 <10 -- <br /> 9/28/94 66.57 -24.80 -2.86 <0.5 <0.5 <0.5 <0.5 <50 <br /> 12/19/94 64.30 -22.53 2.27 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> Destroyed 3/95 <br /> W-7 41.48 <br /> 11/13/87 -- -- -- <0.5 <0.5 <0.5 <0.5 <200 -- <br /> 11/18/87 53.31 -11.83 -- -- -- -- -- -- <br /> 2/1/88 51.32 -9.84 1.99 -- -- -- -- -- -- <br /> 6/24/88 54.57 -13.09 -3.25 -- -- -- -- -- -- <br /> 9/28/88 58.05 -16.57 -3.48 -- -- -- -- <br /> 9/30188 58.10 -16.62 -0.05 -- -- -- -- -- -- <br /> 10/3/88 -- -- -. <0.5 <0.5 <0.5 <0.5 --1/4189 55.53 -14.05 2.57 <0.5 <0.5 <0.5 <0.5 -- -- <br /> 414/89 54.00 -12.52 1.53 -- -- -- -- -- -- <br /> 4/5/89 -- -- -- <0.5 <0.5 <0.5 <0.5 -- -- <br /> 719189 58.58 -17.10 -4.58 -- -- -- -- <br /> 7/10/89 <br /> -7/10/89 -- -- -- <0.5 <0.5 <0.5 <0.5 <br /> 10/16/89 58.95 -17.47 -0.37 <0.5 <0.5 <0.5 <0.5 -- -- <br /> 1/18/90 56.53 -15.05 2.42 -- -- -- -- -- <br /> 1/19/90 <br /> -1/19/90 -- -- -- 1.2 0.5 0.6 0.4 150 -- <br /> 5/9/90 41.44 57.99 -16.55 -1.50 -- -- -_ -- -- _ <br /> 5110/90 -- -- -- <0.3 <0.3 <0.3 <0.3 -- <br /> 10/02/90 63.14 -21.70 -5.15 -- -- -- -- <br /> 10/4/90 -- -- -- 1 1 <0.5 3 -- -- <br /> 1129191 59.82 -18.38 3.32 1.3 <0.5 <0.5 <0.5 -- -- <br /> 3115/91 59.15 -17.71 0.67 -- -- -- -- -- <br /> 4/18/91 <br /> -4/18/91 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 33821TABLEM434N0V6.XLS <br />