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LFR Levine-Fricke The potential exposure pathways for human and ecological receptors include direct contact(e.g., dermal contact, ingestion)with soil, inhalation of airborne dust, direct contact with surface water, and for humans, ingestion of drinking groundwater. Potential human health risks are associated with exposure to elevated levels of metals or to constituents that may be present in pyrolytic oil. The soil data will be evaluated to determine the potential for metals in soil to leach and impact groundwater. Effect of chemicals on Beneficial Uses-HSC Section 25356.1(d)(2) The current and the planned use of the property as open space are consistent with the proposed RAP activities. The beneficial uses of the shallow ground water at the Tracy Tire Fire Site have not been identified as yet but will be evaluated during the remedial investigation. Effect of Remedial Action on Availability of Ground Water Resources-HSC Section 25356.1(4)(3) Beneficial uses of site ground water will be identified during the remedial investigation. Remedial actions proposed for the Tracy Tire Fire Site are not expected to impact the availability of ground water resources in the site area. The remedial action objectives are to remediate metals in shallow soil, tire fire ash, and any remaining shallow pyrolytic oil. The proposed remedial alternative will result in the removal of potential surface and ground water contaminant sources. Site Specific characteristics -HSC Section 25356.1(d)(4) Chemicals in soil and ground water at the Tracy Tire Fire Site have been characterized to the extent necessary to proceed with an interim removal action. Remediation of soil and pyrolytic oil will prevent human exposure to impacted soil. Cost-Effectiveness of Alternative Remedial Action Measures-HSC Section 25356.1(4)(5) The proposed remedial action alternative, Alternative 3, Excavation of Pyrolytic Oil- and Metals-Affected Soil for Off-Site Disposal, was judged to be the most effective, implementable, and cost-effective for addressing the shallow soil, tire fire ash, and visible pyrolytic oil. The no action alternative is estimated to be lower in cost, but it would not actively achieve the remedial action objectives. Potential Environmental Impacts of Alternative Remedial Action Measures-HSC Section 25356.1(d)(6) Potential environmental impacts will be mitigated under the proposed alternative, which includes engineering solutions combined with administrative measures. As such, the proposed remedial alternative will not create any significant environmental impacts. Page B-2 Final_RAP_Tracy_9.18.03(final).doaLFR