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1.0 INTRODUCTION AND BACKGROUND In November 1993, the J.R. Simplot Company (Simplot) conducted a limited soil survey in the former agricultural chemical area of their Lathrop, California facility (Figure 1). This survey was conducted in preparation for a minor construction project which required excavation. The results of the survey indicated the presence of the fumigant compounds Dibromochloropropane (DBCP) and Ethylenedibromide (EDB), along with several other Organochlorine Pesticides, in the shallow soils at one particular boring location identified as SW (northwest corner of the warehouse - Figure 2). The results of the initial survey are contained in Table 1. Based on the results of the initial survey, the Occidental Chemical Corporation (OCC) conducted a site investigation in late March 1994. A total of eight boreholes were installed in the locations shown on Figure 3. From each borehole, a maximum of three soil samples were collected and analyzed. The results of these sample analyses, as shown on Tables 2 and 3, indicated that fumigant and organochlorine pesticide compounds were present in a limited area ' of the shallow soils in the former agricultural chemical area of the Lathrop Simplot facility. Of these compounds, only the concentrations of DBCP were significant. The site investigation activities were reported in the May 6, 1994 "Site Investigation ' Report". ' From the lateral and vertical sample data collected, the major extent of the DBCP presence was found to be isolated to a forty foot diameter area with a ' maximum depth of slightly over eight feet (See Figures 4 & 5). The impacted area was estimated to be 72 cubic yards. Based on these data, it was recommended that the impacted soils containing greater than 1.0 mg/kg of DBCP be excavated and disposed of. The following discussion provides the details of the proposed soil removal activities. 1