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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 METE <br /> 415/89 <0.5 <0.5 <0.5 <0.5 -- -- <br /> 7/9/89 58.42 -16.52 -3.85 -- -- -- -- -- -- <br /> 7/11/89 -- -- -- 6.7 <0.5 <0.5 <0.5 --10/16/89 59.51 -17.61 -1.09 <0.5 <0.5 <0.5 <0.5 1/18/90 57.20 -15.30 2.31 -- -- -- -- <br /> 1/19/90 -- -- -- 2.4 II 5.8 68 980 -- <br /> 5/9/90 41.84 58.15 -16.31 -1.01 -- -- -- -- -- <br /> 5/10/90 <br /> -5/10/90 -- -- -- <0.3 4.9 5.4 5.5 -- -- <br /> 10/02/90 63.58 -21.74 -5.43 -- -- -- -- -- -- <br /> 10/4/90 -- -- -- <0.5 <0.5 <0.5 <0.5 -- <br /> 1/29/91 60.35 -18.51 3.23 -- -- -- -- <br /> 1/31/91 <br /> -1/31/91 -- -- -- <0.5 <0.5 <0.5 <0.5 --3/15/91 59.66 -17.82 0.69 -- -- -- -- -- <br /> 4/18/91 <br /> -4/18/91 -- -- -- 9.2 <0.5 <0.5 <0.5 <50 -- <br /> 7/22/91 62.65 -20.81 -2.99 -- -- -- -- -- -_ <br /> 7/25/91 -- -- -- 4.9 0.6 <0.5 <0.5 110 -- <br /> 10/22/91 63.95 -22.1 1 -1.30 -- -- -- -- -- <br /> 10/24/91 -- -- -- 1.1 <0.5 <0.5 <0.5 <50 -- <br /> 2/10/92 61.13 -19.29 2.82 <0.8 <0.5 <0.5 <0.5 60 <br /> 5/12/92 60.72 -18.88 0.41 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8/18192 65.56 -23.72 -4.84 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/16/92 65.73 -23.89 -0.17 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 2/22/93 63.38 -21.54 2.35 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 5/25/93 62.65 -20.81 0.73 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8/23/93 66.57 -24.73 -3.92 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/16/93 64.50 -22.66 2.07 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 3/22/94 60.21 -18.37 4.29 <0.3 <0.3 <0.3 <0.5 <10 -- <br /> 6/23/94 62.78 -20.94 -2.57 <0.3 <0.3 <0.3 <0.5 <10 -- <br /> 9/28/94 66.25 -24.41 -3.47 <0.5 I.1 <0.5 <0.5 <50 -- <br /> 12/19/94 64.12 -22.28 2.13 2.2(c) <0.5 <0.5 <0.5 <50 -- <br /> 3/2/95 61.96 -20.12 2.16 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 5/18/95 60.27 -18.43 1.69 <0.5 <0.5 <0.5 <0.5 <50 <br /> 8/10/95 63.81 -21.97 -3.54 <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/17/95 63.04 -21.20 0.77 <0.5 <0.5 <0.5 <0.5 <50 <3 <br /> 2/14/96 60.26 -18.42 2.78 0.65 1.7 <0.5 12 55 -- <br /> 3 3 82\TA <br /> -33821TA B Lh31434 NOV6.X LS <br />