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1714 Main Street <br />Escalon, California 95320 <br />Telephone: (209) 838-9888 <br />Facsimile: (209) 838-9883 <br />February 26, 2007 <br />Mr. Robert McClellon <br />San Joaquin County Environmental Health Department <br />304 East Weber Avenue, Third Floor <br />Stockton, CA 95202-2708 <br />Subject: Workplan for Site Mitigation <br />Parcel 249-060-14, Santa Fe Road, Riverbank, CA <br />Former Snyder Sanitary Dump Site <br />Dear Mr. McClellon: <br />Ground Zero Analysis, Inc. (Ground Zero) has prepared this letter report on behalf of Mr. Peter <br />Palomino to present a workplan to outline proposed mitigation activities at the subject parcel. As <br />Figure 1 shows the location of the Site. Figure 2 shows the approximate parcel boundaries. <br />The Site is located just north of the town of Riverbank and the Stanislaus River. Parcel APN <br />249-060-14 (Parcel 14) is a square shaped parcel that totals approximately 10 acres of land. The <br />ground surface is elevated along the western boundary, where it abuts the railroad, and is <br />generally level on the majority of the parcel. Shallow groundwater beneath the Site lies at a depth <br />of approximately 28-30 feet below ground surface (bgs) and reportedly flows generally south, <br />based upon information obtained from a nearby UST site. It is our understanding that the Site is <br />currently designated for general agricultural use. <br />The Site was previously part of a Closed, Illegal, and Abandoned (CIA) landfill identified by the <br />California Integrated Waste Management Board (CIWMB) as the Snyder Sanitary Dump Site. <br />An April 2003 report entitled Site Investigation, Santa Fe Road Disposal Site, County of San <br />Joaquin, Final Report, summarized a site investigation conducted by the CIWMB. The objective <br />of the CIWMB investigation was to 1) verify current ownership of all parcels previously operated <br />as the Snyder Landfill, 2) to determine the horizontal and vertical extent of the waste, 3) to <br />characterize the waste via sampling and laboratory analyses, and 4) to determine the condition of <br />