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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 i g/L <br /> and date in feet(a) in feet in feet in feet Benzene Toluene Eth (benzene Xylenes TPH-G MBTE <br /> W-10 42.61 <br /> 5/9/90 58.74 -16.13 -- 2.5 0.4 0.4 2 -- -- <br /> 10/02/90 64.00 -21.39 -5.26 <br /> 1014190 -- -- -- 16 2 3 10 -- -- <br /> 1/29/91 60.50 -17.89 3.50 <br /> 2/2/91 -- -- -- 26 2.5 0.6 3.6 --3/15/91 59.89 -17.28 0.61 <br /> 4/17/91 -- -- -- 6.4 <0.5 <0.5 0.97 <50 -- <br /> 7122/91 63.04 -20.43 -3.15 <br /> 7124191 -- -- -- 56 <0.5 <0.5 2.3 2900 -- <br /> 10/22/91 64.22 -21.61 -1.18 <br /> 10/23/91 -- -- -- 54 <0.5 <0.5 2.3 1100 -- <br /> 2/10/92 61.33 -18.72 2.89 <br /> 2/11/92 -- -- -- 15 <1 <1 <1 360 -- <br /> 5/12/92 61.02 -18.41 0.31 20 0.7 <0.5 1.7 400 -- <br /> 8/18/92 65.99 -23.38 -4.97 26 <0.5 <0.5 <0.5 230 -- <br /> 11/17/92 65.72 -23.11 0.27 3.5 <0.5 <0.5 <0.5 <50 -- <br /> 2/22/93 -- -- -- -- -- -- -- <br /> 5125193 62.63 -20.02 3.09 <br /> 5/26/93 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8123193 67.00 -24.39 -4.37 <br /> 8124/93 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/17/93 63.97 -21.36 3.03 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 3/22194 60.37 -17.76 3.60 <0.3 <0.3 <0.3 <0.5 <10 -- <br /> 6/23/94 -- -- -_ -- -- -- -- -- -- <br /> 9/28/94 ._ <br /> 12/19/94 <br /> 3/2/95 62.04 -19.43 -1.67 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 5118/95 60.24 -17.63 1.80 <br /> 5/19/95 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8/10/95 63.92 -21.31 -3.68 <br /> 8111195 -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/17/95 62.98 -20.37 0.94 <br /> 2/14/96 60.30 -17.69 2.68 <0.5 0.50 <0.5 4.7 <50 -- <br /> 33821TARLGS1434NOV6.XLS <br />