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Table 1. Water-Level Elevations for <br /> ARCO Facility 2133,Stockton,California <br /> Top-of-casing Depth-to- Depth-to- Product Water-levelChange since <br /> Well number elevation, bottom of well water, thickness, elevation, last measurement, <br /> and date in feet(a) (below TOC) in feet in feet in feet(b) in feet <br /> MW-5 1 04 (i) <br /> 318195 1291 -- -1 187 -- <br /> 612/95 11 40 -- -1036 1 51 <br /> 9111195 1365 -- -1261 -2 25 <br /> 1215195 1403 -- -1299 -038 <br /> 3/18/96 1082 -- -978 3.21 <br /> (a)Elevations are based on professional survey of July, 1990,unless otherwise noted <br /> (b)Corrected water-level elevation value where free product is present(Wlc=Wlm+(b)(p)),where <br /> Wlcswater-level elevation corrected,Wlmawater-level elevation measured,bahydrocarbon thickness(in <br /> feet),paspecific gravity(0 7)of hydrocarbon <br /> (c) Well not measured because it was covered by soil pile <br /> (d)Well was essentially dry, water was present in the unscreened bottom cap of the well,but <br /> does not likely represent the water table elevation at the time of measurement <br /> (e)Well casing was altered during construction of the SVE/AS system Well casing will require resurveying <br /> (f)Elevation of 15"conductor casing based on professional survey of February 24, 1995 The elevation of <br /> the top of monitoring well casing was not surveyed <br /> (g) Well under vacuum and was not accessible <br /> (h)EIevation of top of monitoring well casing calculated from professional survey of February 24, 1995 <br /> (see footnote f) <br /> (i) Elevation based on professional survey of May 2, 1995 <br /> Note Dash indicates not measured or not calculated <br /> 3316\TABLE5\2133MAR6 XLS <br />