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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-level Change since <br /> i <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 /> 9111/95 1365 -- -1261 -225 <br /> 12/5195 1403 -1299 -038 <br /> 3/18196 1082 -- -978 3 21 <br /> 6118196 950 -- -846 132 <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 /> Wlc=water-level elevation corrected, Wlm=water-level elevation measured,b=hydrocarbon thickness(in <br /> feet),p=specific 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)Elevation 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 /> 33161TABLES12133JUL6 XLS <br />