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I!I � J Consent Decree Exhibit C surface water and to reduce leachate generation. An additional two feet of soil cover was placed over the waste areas, and the East Ditch was regraded to improve drainage. The second Interim Action occurred in 1997 and 1998 for the installation of the leachate collection trench and transmission system. This project provided a geomembrane cover on the eastern side slopes of the landfill to control leachate seeps and thus avoid overland transit of leachate to the East Ditch. The leachate collection system consists of a lined leachate collection trench, two pump stations, a force main and access road. Additional interim action measures included site fencing, site cover and control of water on the eastern portion of the Site, removal off -site of remaining tires, and on -site disposal of tire fire ash. Ash from the 1983 tire fire was moved to the site of the 1984 fire. This tire fire area was then filled with spoils from the leachate trench and capped with two feet of clean fill. The placement of two feet of clean soil was deemed appropriate by Ecology because the tire fire ash was no longer classified as dangerous waste under the new Dangerous Waste Regulations (Chapter 173-303 WAC, amended November 1996). While not part of the formal Interim Action, be City also conducted an independent action removing one to two feet of debris and soil from the East Ditch to address debris and potential sediment contamination (Black & Veatch, 1995) in the ditch. Excavated material from the East Ditch was placed within the landfill and covered with four feet of clean soil. 2.4.2 Brownfields Pilot Project In the fall of 1998, the City received an EPA Brownfields Pilot Project Grant to evaluate redevelopment requirements for the former landfill and adjacent Simpson properties. Under the Brownfields Pilot Project grant, the City produced a summary of existing conditions, performed a geotechnical investigation of the Site, and produced a preliminary evaluation of requirements that would be necessary to allow potential future redevelopment consistent with the Comprehensive Plan, while ensuring the environmental integrity of the Site. This preliminary evaluation of environmental requirements for Site redevelopment was reviewed with Ecology. Ecology requested the preparation of a Brownfields Feasibility Study to support definition of environmental cleanup requirements in the CAP that could anticipate future Site redevelopment consistent with the Comprehensive Plan. FINAL - March 2001 2-4 Everett Landfill Tire Fire Site Cleanup Action Plan 1 1 1 I - I