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1 <br />1 <br />1 <br />7 1 <br />L_ <br />1 <br />L� <br />1 <br />1 <br />The City of Everett <br />The Floyd & Snider Team Everett LandfillfTire Fire Site <br />2.0 Purpose and Objective <br />2.1 OVERVIEW OF SITE CONDITIONS <br />After over 50 years of operation, the Everett Landfill stopped accepting waste in 1974 and was <br />closed the following year under WAC 173-301, Regulations Relating to Minimum Functional <br />Standards for Solid Waste Handling. In 1977, a commercial recycling operation began storing <br />and handling old rubber tires on portions of the landfill site. In 1983 and 1984, two separate <br />fires occurred in the tire piles, causing Ecology to request that the City perform an <br />environmental characterization of the tire fire ash. In 1989, the Landfill/Tire Fire Site was listed <br />under the Model Toxics Control Act due to the presence of tire ash, then classified as <br />dangerous waste. A 1996 amendment to the Dangerous Waste Regulations (Chapter 173-303 <br />WAC) declassified the tire ash. In 1995, the City performed the site's first Interim Action, <br />"Everett Landfill Site Grading," which regraded the entire site except for the two tire fire areas to <br />allow the collection of surface water and to reduce leachate generation. The second Interim <br />Action occurred in 1997 and 1998 for the installation of the leachate collection trench and <br />transmission system. See Figure 2-1, Site Map for location of the leachate collection system. <br />This project provided a geomembrane cover on the eastern side slopes of the landfill to control <br />leachate seeps, site fencing, site cover and control of water on the eastern portion of the site, <br />removal off -site of remaining tires, and on -site disposal and capping of tire fire ash. The City <br />also conducted an independent action removing one to two feet of debris and soil from the East <br />Ditch to address debris and potential sediment contamination (Black & Veatch, 1995) in the <br />ditch. Excavated material from the East Ditch was placed within the landfill and covered with <br />four feet of clean soil. <br />Through the City of Everett's Comprehensive Planning process and the process for Shoreline <br />Master Program revisions, the landfill property is in an area designated for redevelopment. The <br />Comprehensive Plan states: <br />The Snohomish River area south of Highway 2 is encouraged to redevelop with <br />high quality development that provides public access to the river shoreline and <br />includes a variety of activities and uses that aesthetically improve this highly <br />visible part of the city. (City of Everett, 1997; page 1-13) <br />Before development can reasonably proceed on the site, construction and operation <br />requirements must be defined for development in order to ensure that contaminated materials <br />do not compromise environmental exposure pathways. These environmental requirements for <br />future development are evaluated in the Brownfield Feasibility Study (BFS) (Floyd & Snider, <br />2000). <br />Ecology requested that four environmental exposure pathways be addressed in the BFS. <br />These pathways are: gas, groundwater, direct contact and surface water. The site conditions <br />and cleanup levels for each pathway are briefly described below. <br />The gas pathway considers methane gas produced by decomposing buried refuse. Air quality <br />studies were completed for the site in 1996 and 1999, and included landfill gas sampling, <br />dots\ ects Hance R Everett landfl1 CP 11-aker -O final Compliance Monitoring and Contingency Plan <br />docslCompliance Monitoring PIan1CMCP 11-10-OO.doc <br />FINAL - March 2001 Page 2-1 <br />