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primarily consists of elevated concentrations of metals. Contaminated soil and ash and other residual materials such as steel radials and solidified pyrolytic oil will be excavated and disposed to mitigate impact on groundwater beneath the Site. The Site consists of 34 distinct burn-pile areas (Figure 2). The burn-pile areas have been grouped into three separate units for phased excavation. Unit 1 is the most northerly of the three units and consists of burn-pile areas 1, 2, 3,4, 5, and 9. Unit 2 is located adjacent to Unit 1 on the south and consists of burn-pile areas 6, 7, 8, 10, 11, and 12. Unit 3 is located adjacent to Unit 2 on the south and east, and consists of burn-pile areas 13- 34. Based on the initial geodetic survey of the 34 burn piles, there is approximately 564,000 square feet of burn pile area. Assuming the removal of approximately the top two feet, there will be an initial removal of approximately 1.13 million cubic feet(41,800 cubic yards)of ash and soil. The excavation extent may be modified in the field based on visual observation to assure that soil obviously affected by the fire is removed. The contaminated soil from the burn areas will be transported to Class I and If landfill facilities depending on soil characterization results. The Work Plan to conduct these activities will be prepared by the CIWMB field contractor. Primary removal activities will consist of the excavation and removal of the top 18 to 24 inches of soil located at each of the identified tire fire burn areas at the Site. This material primarily consists of melted radial tire wires and melted tire rubber(pyrolytic oil). This soil will be transported to a Class I landfill. After the removal of the Class I non-RCRA hazardous waste, additional excavation will be conducted to remove remaining Class 11 designated waste. After the top 18 to 24 inches of soil has been removed, the CIWMB consultant will conduct confirmation sampling at each of the burn areas to quantify the concentration of metals or pyrolytic oil remaining for further evaluation of potential remediation. The CIWMB consultant is responsible for preparing the sampling and analysis plan (SAP), conducting confirmation soil sampling, and managing the analytical results provided by the laboratory as a basis for this future work. During excavation activities, dust and equipment emission controls will be implemented to protect workers in accordance with the site specific Health and Safety Plan (HSP). The site safety officer will conduct personal and perimeter air monitoring during construction activities to assure compliance with the HSP. A hand held photoionization detector(PID) and hand held dust meter may be used to monitor air quality during the project activities. Following the completion of the removal action, a future comprehensive remedial investigation will be conducted to fully characterize the Site and evaluate appropriate final remedial measures. This Initial Study assesses the potential effects associated with the proposed initial removal action. As a separate future project DTSC will complete a comprehensive remedial investigation/feasibility study(RI/FS)and preparation of a Final RAP. Site Description: The Tracy Tire Fire Site (the Site) is approximately 50 acres, primarily consisting of an abandoned gravel pit. The Site occupies San Joaquin County Assessors Parcel Number(APN) 253-120-26, and is under the ownership of the Silas F. Royster Estate; however, the Site is currently under the jurisdiction of the California Integrated Waste Management Board (CIWMB) which is serving at the responsible agency. The remediation efforts are being managed by the CIWMB in partnership with the Department of Toxic Substances Control (DTSC), the lead agency for the Site. 2