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SNrFN ENVIRONMENTAL TECHNOLOGIES CORPORATION May 1, 1996 Ms. Linda Turkatte San Joaquin County Public Health Services Environmental Health Division ?� U P.O. Box 3 88 Stockton, CA 95201-0388 Subject: Well Destruction Permit Application, Ekholm Property, 1702 Jackson Street, Escalon, California Dear Ms. Turkatte: As you are aware, case closure has recently been granted by the San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) for Ekholm property located at 1702 Jackson Street, Escalon California (Figure 1). Smith Environmental Technologies Corporation has been requested by Mrs. Margaret Ekholm to conduct final closure activities at the site including abandoning nine existing groundwater and vapor wells located at the site. Smith Environment proposes to abandon the wells using the following described methodologies. The locations of the wells are shown on Figure 2. The casing and sandpack for groundwater monitoring wells MWA through MW-4 will be overdrilled by a licensed drilling company. Subsequent to overdrilling, the borings will be filled with a neat cement grout from the bottom of the borings to 1 foot below grade using tremie hose. The top 1 foot of the borings will be backfilled, flush with the ground surface, with concrete, asphalt patch or native soil to match the exiting surface. Vapor extraction wells VW-1 through VW-5 will be abandoned by pressure grouting the casing and sandpack with a cement/bentonite grout mixture, leaving the casing in-place. The well boxes will be removed, if possible, and the top two to four feet of each boring will be backfilled, flush with the ground surface, with concrete, asphalt patch, or native soil to match the existing surface. Attached please find a completed well destruction application with check no. 1020 for the permit fee ($60)to perform this work. 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 Engineering - Consulting Remediation Construction