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r 1117 Lone Palm Avenue, Suite B <br /> CA <br /> Modesto, CA 95351 1 <br /> www.atc-enviro.com <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> A S S O C I A T E S I M C - - <br /> ,� <br /> APR 2 0 2004 <br /> April 15, 2004 W41RONMENT HEALTH <br /> 54.62574.0002 PE{f,U/SERVICES <br /> Mr. Jeff Wong <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 E. Weber Street, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Workplan for Destruction of Groundwater Monitoring Wells at Smiths Canal <br /> Pump Plant,Fontana Street and Smiths.Canal, Stockton, California, Site Code 1102 <br /> Dear Mr. Wong: <br /> ATC Associates Inc., on behalf of the City of Stockton, has prepared this workplan for the <br /> destruction and abandonment of groundwater monitoring wells at the above referenced site. <br /> The scope of work in brief includes obtaining permits, pressure grouting six groundwater <br /> monitoring wells, overdrilling one groundwater monitoring well, and preparing a summary <br /> report. The scope of work is described in detail in the following paragraphs. <br /> SITE LOCATION <br /> The site is located on the north side of Smith Canal and the west side of Fontana Avenue in <br /> Stockton, California, as shown on Figure 1. The location is primarily a commercial and industrial <br /> area. The site is currently occupied by the Smiths Canal Pump Plant. <br /> SCOPE OF WORK <br /> Field Activities <br /> ATC proposes to abandon monitoring-wells MWl through MW 7. Well locations are shown on <br /> Figure 2. The well boxes, locking plugs, and top two feet of casing will be removed from each <br /> well prior to abandonment. All of the monitoring wells, except for well MW4,will be abandoned <br /> by filling each well casing and filter pack with a neat cement/bentonite grout. The grout will be <br /> emplaced by pressure grouting with a pressure-grouting tool that includes a pressure grouting cap <br /> to insure that the grouting material completely penetrates all void space in the abandoned wells. <br /> W:\13099\wp-wellabandonment.doc I <br /> ENVIRONMENTAL,GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />