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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 /> • Well number elevation, bottom of well water, thickness, elevation, last measurement, <br /> and date 1n feet(a) (below TOC) 1n feet in feet in feet(b) in feet <br /> 318195 13 21 -1192 2 42 <br /> 6/1195 1172 -- -1043 149 <br /> 9111195 1394 -- -1265 -222 <br /> 12/5/95 14.26 -- -1297 -0.32 <br /> MW-2 2 88 2920 <br /> 1119193 1689 -- -1401 -- <br /> 3121194 1644 -- -13 56 0 45 <br /> 6127194 1629 -- -13 41 0 15 <br /> 9129194(c) -- -- -- <br /> 1218/94(e) 15 43 -- -12 55 086 <br /> 318195 2 54 (f) 1297 -- -- -- <br /> 6/1/95 (g) -- -- --9/11/95 1374 -- -- -- <br /> 12/5/95 115 (h) 14.10 -- -12.95 -- <br /> MW-3 2 31 (1) <br /> 318195 1418 -- -11 87 -- <br /> 6/1/95 1255 -- -1024 163 <br /> 9/11/95 1484 -- -1253 -229 <br /> 1215/95 15.20 -- -12.89 -036 <br /> • MW4 2 54(1) -- -- <br /> 3/8/95 1431 -1177 <br /> 612/95 1286 -- -1032 145 <br /> 9/I 1195 15 04 -- -1250 -218 <br /> 1215/95 15.46 -- -12.92 -0.42 <br /> MW-5 1 04(1) <br /> 3/8/95 1291 -- -1187 -- <br /> 6/2195 1140 -- -1036 151 <br /> 9/11/95 1365 -- -1261 -225 <br /> 12/5/95 14.03 -- -12.99 -038 <br /> (a)Elevations are based on professional survey of July, 1990,unless otherwise noted <br /> (b)Corrected water-level elevation value where free product 1s present(Wlc—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 1t was covered by soil pile <br /> (d)Well was essentially dry,water was present 1n 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 SVFJAS 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 /> (1)Elevation based on professional survey of May 2, 1995 <br /> Note Dash indicates not measured or not calculated <br />