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Environmental <br /> Resources <br /> Management <br /> 1277 Treat Boulevard <br /> Suite 500 <br /> Walnut Creek,CA 94597 <br /> (925)946-0455 <br /> (925)946-9968(fax) <br /> 28 June 2013 <br /> Mr. Harlin Knoll, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department ERMo <br /> 1868 Hazelton Avenue, <br /> Stockton, CA 95205 <br /> Subject: Proposed Monitoring Well Abandonments <br /> Dear Mr. Knoll: <br /> ERM-West, Inc. (ERM) has prepared a San Joaquin County <br /> Environmental Health Department (County) Well Permit Application for <br /> work to be completed at the Former Heinz USA (Heinz) Facility in Tracy, <br /> California (site; Figure 1). The project site is at 757 E Eleventh Street in <br /> Tracy, California. The former underground tank locations associated <br /> with this project are shown on Figure 2. <br /> The scope of work includes the abandonment of eight on-site <br /> groundwater monitoring wells (MW-1 through MW-8). This work is <br /> being performed to complete the requirements to obtain a "Case Closure <br /> Letter " ("No Further Action Letter") as outlined in the County's letter to <br /> Heinz dated 3 May 2013. <br /> ERM„will oversee the abandonment of the eight ground water <br /> monitoring wells at the site. The well locations are shown on Figures 3 <br /> and 4. The wells will be abandoned using over-drilling techniques. Prior <br /> to abandonment, each well will be inspected to ensure no obstructions <br /> exist within the casing. Abandonment activities will consist of over- <br /> drilling each well using 10-inch diameter hollow-stem-augers. The entire <br /> casing of each well will be removed, and the void will be filled to the <br /> bottom with an approved sealing material as per County requirements. <br /> Surfaces will be finished to match the surrounding area. <br />