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CALIFORNIA ENVIRONMENTAL QUALITYACT INITIAL STUDY The Department of Toxic Substances Control(DTSC) has completed the following Initial Study for this project in accordance with the California Environmental Quality Act(§21000 at seq., California Public Resources Code) and implementing Guidelines (§15000 et seq., Title 14, California Code of Regulations). L PROJECT INFORMATION Project Name: Remedial Action Plan for Pyrolytic Oil- and Metals-Affected Soil at the Tracy Tire Fire Site Site Location: The Tracy Tire Fire Site is located at 29425 South MacArthur Drive, approximately 3 miles south of Tracy in San Joaquin County, California. The geographic coordinates for the Site are 370 41' 12" north latitude and 1210 25' 21"west longitude (Section 9, Township 3 south, Range 5 east of the Mount Diablo Base Meridian). The location of the Site is shown in Figures 1 and 2 (Attachment B). State Lead Agency Contact: Chris Sherman Department of Toxic Substances Control 8800 Cal Center Drive Sacramento, California 95826 Phone: (916)255-3706 Project Description: The project described herein ("the project") has been proposed to remediate contaminants present at the Tracy Tire Fire Site ("the Site") as a result of the tire fire (Figure 1).An Initial Study has been prepared to evaluate the potential for impacts to the Site due to remediation activities. A Draft Remedial Action Plan (RAP) has been prepared as an interim remedial measure to remove the majority of Class I California non-Resource Conservation and Recovery Act(non-RCRA) hazardous waste and Class II designated waste identified at the Site. Once the majority of the waste has been removed from the Site, the California Integrated Waste Management Board (CIWMB)will authorize a comprehensive remedial investigation/feasibility study(RI/FS)and preparation of a Final RAP. Clean up criteria will not be required for the interim removal activity, but will be established and approved by the involved State regulatory agencies during preparation of a later Final RAP. Based on data from the preliminary RI/FS, impact to soil at the proposed Site from contaminants related to the tire fire has occurred. Seven metals were analyzed using soluble threshold limit concentration (STLC), total threshold limit concentration (TTLC), and toxicity characteristic leaching procedure (TCLP) methods. Zinc was the only metal that significantly exceeded the STLC (250 mg/1)and the TTLC (>30,000 mg/kg)..No metals exceeded the representative action level for the TCLP. Impact to soil appears to be limited to those areas where tires burned and t