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Table I. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations in pgJL to <br /> Tap-of-casing Depth-to- product Water-level since last <br /> Well number clevation, water, thickness elevation, measurement, Total <br /> and date in feet (a) in feet in feet in feet(b) in feet Benzene Toluene Eth (benzene xylenes TPH-G MTBE DO <br /> 10/26/95 -- ._ -- -- -- -- -- -- -- <br /> 2112190 8.85 -- 38,23 0.21 <0.5 <0.5 <0.5 <0.5 <50 -- -- <br /> 4/18/96 9.22 -- 37.86 -0.37 <0.5 <0.3 <0.5 <0.5 <50 -- <br /> 7/18/96 9.53 37.55 -0.31 <0.5 <0.5 <0,5 <0,5 <50 <5 <br /> 11/15/96 10,00 -- 37.08 -0.47 <0.5 <0.5 <0.5 <0.5 <50 <5 -- <br /> 3/14/97 10.11 -- 36.97 -0.11 <0.5 <0.5 <0.5 <0.5 <50 -- 0.09 <br /> SMW-1 50.24 <br /> 1017194 12.86 -- 37.38 -- 250 110 <0.5 360 2200 -- -- <br /> 12/16/94 12.54 -- 37.70 0.32 740 210 330 600 5200 <br /> 2/28/95 12.40 -- 37.84 0.14 1000 330 450 790 8300 -- -- <br /> 4/26/95 12.71 -- 37.53 -0.31 470 110 270 480 5100 -- -- <br /> 7127/95 13.00 -- 37,24 -0.29 410 42 360 630 7400 -- <br /> 10/26/95 (c) 13.03 -- -- -0.03 -- -- -- -- -- -- -- <br /> 10/27/95 -- -- -. - 640.0 33_W.. 440=.- . .. ,,.. 7600: <br /> 2112196 12.00 -- -- 1.03 390 <0.5 220 98 3800 -- -- <br /> 4/18/96 12.58 -- -- -0.58 60 <0.5 20 7.4 500 -- -- <br /> 7/18196 12.85 -- -0.27 200 <5 130 56 3400 60 -- <br /> 11/15/96 13.40 -- -- -0,55 180 <2.5 62 21 2500 590 -- <br /> 3114197 13.35 -- -- 0.05 130 <0.5 41.5 <0.5 1700 230 0.13 <br /> e <br /> E <br /> L <br /> 47471TABLES12093 MAR7.XLS <br />