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Table 1. Water-Level Elevations <br /> ARCO Facility 434, Lodi, California <br /> • Top-of-casing Depth-to- Water-level Change since <br /> Well number elevation water elevation last measurement <br /> and date (feet) (a) (feet) (in feet) (feet) <br /> W-12 4245 <br /> 4/23/90 5869 -1624 -- <br /> 10/02/90 6428 -21 83 -559 <br /> 1/29/91 6100 -1855 328 <br /> 3/15/91 6020 -1775 080 <br /> 7122191 63 I8 -2073 -298 <br /> 10/22/91 6450 -2205 -132 <br /> 2110/92 61 77 -1932 273 <br /> 5/12/92 6131 -1886 046 <br /> 8118/92 6609 -2364 -478 <br /> 11/17/92 6627 -2382 -018 <br /> 2/22/93 6397 -21 52 230 <br /> 5125193 6324 -2079 073 <br /> 8/23193 6703 -2458 -379 <br /> 11/16/93 65 14 -2269 1 89 <br /> 3/22194 6085 -1840 429 <br /> 6/23/94 6339 -2094 -254 <br /> 9/28/94 6683 -2438 -344 <br /> 12/19/94 6478 -2233 205 <br /> 3/2/95 6257 -2012 2.21 <br /> (a)Elevation based on City of Lodi benchmark#786 located on the corner of <br /> Kettleman Lane and Hutchins Street Elevation of benchmark is 43 11 feet <br /> above sea level <br /> (b)Well obstructed <br /> (c)New well replaced in same borehole as former well W-2 <br /> (d)Well casing elevation not surveyed on this date <br /> (e)Dry well <br /> (f)Surveyed by Tom Morrow,Inc March 1, 1995 <br /> (g)Well Could not be located by Emcon field personnel <br /> (h)Well inaccessible <br /> Dash indicates not measured or calculated Bold numbers measured this quarter <br /> i <br />