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l sb agencies worked together to conduct emergency response activities form the time the fire 'i was discovered through August 10, 1998. Due to the site geography and surrounding land use, the unified command elected to allow the tire fire to burn out over time. Firefighters were not allowed to use water to extinguish the flames because it may have -1 created a runoff of toxic oils that could potentially pollute local streams and groundwater ,> supplies. County, state and federal agencies continued to monitor the fire, which steadily diminished with the exception of three burn areas [hot spots] which were still burning --t during November, 2000. -7 Suppression of the remaining burn areas at the TTFS began on Tuesday, December 5, 2000, after a full day site orientation. The suppression was directed under a unified } command coordinated by the CIWMB. Suppression activities lasted 5 days. The following is a description of onsite activities. -4- An excavator pulled materials apart and created a stockpile; 4- Extinguishment and cooling of burning ash, to expose remaining areas of burning tires and byproducts; _ Local firefighters foamed the material during various phases of material segregation by the heavy eo_uipment operators; and `I -4- A dozer spread the foamed material into thin lifts for later commingling with dirt. The site is currently under the jurisdiction of the CIWMB, who is managing the remediation efforts. -' 1.2.3 Description of Scheduled Remediation Activities i The remedial action objective (RAO) for the TTFS is to remove or mitigate the source of contamination based on visual inspection of burnt material present in the 34 burn piles. The goal of this RAO is to maximize removal of Class I non-RCRA hazardous waste, Class II designated waste, and potentially discolored soil from the project site. Remedial alternatives were evaluated relative to their effectiveness in meeting the RAO for the Site. Excavation of burned tires, ash, and pyrolytic oil- and metals-affected soil directly beneath the burned material followed by disposal at a state-permitted Class I or Class 11 landfill is the proposed alternative that best meets the project objectives. Specifically, the scope of work involving this HSP includes the following remedial activities and is estimated to take between 4-6 months to complete. The primary waste removal action, will consist of the removal of the top 18 to 24 inches of ash, burned .? material and affected soil located at each of the identified tire fire burn locations at the site. The volume of ash, burned material and soil that is proposed for removal is approximately 41,000 cubicyards of material. The material removed will likely consist of contaminated soils and associated remnants of the tire fire including melted radial tire Sb Environmental Services, CCC© October,2003 California Integrated Waste Management Board Site Specific Health and Safety Plan Page 3 of 62 Tracy Tire Fire Remediation Project