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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 i Water-level Change 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-3 2 31 (h) <br /> 3/8/95 1418 -- -1187 -- <br /> 6/l/95 1255 -- -1024 1 63 <br /> 9/11/95 14 84 -- -12.53 -229 <br /> MW4 2 54(h) <br /> 3/8/95 1431 -- -1177 -- <br /> 6/2195 1286 -- -1032 1 45 <br /> 9/11/95 1504 -- -1250 -218 <br /> MW.5 1 04 (h) <br /> 3/8/95 1291 -- -11 87 -- <br /> 6/2/95 1140 -- -1036 1 51 <br /> 9/11/95 13.65 -- -12.61 -2 25 <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(W1c—Wlm +(b)(p)), where <br /> WIc—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 Data collected by GTI <br /> is based on the altered well casing and is not valid Well casing will require resurveying <br /> (f)Elevation based on professional survey of February 24, 1995 <br /> (g)Well under vacuum and was not accessible <br /> (h)Elevation based on professional survey of May 2, 1995 <br /> Note Dash indicates not measured or not calculated <br /> I <br />