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3.1 SPECIAL WASTES Pursuant to Title 23, Chapter 3, Subchapter 15 of the CCR, Class III sites are designated exclusively for nonhazardous solid wastes defined as follows: Any putrescible or nonputrescible solid, semisolid or liquid waste, including garbage, trash, refuse, paper, rubbish, ash, industrial wastes, demolition or construction wastes, abandoned vehicles and parts thereof, discarded home or industrial appliances, manure, vegetable or animal solid or semisolid waste and other discarded solid wastes. The site's Class III designation excludes acceptance of hazardous wastes. A hazardous waste screening program will be implemented at the site to minimize the potential for unacceptable wastes to enter the landfill (see Section 6.11). This program is modelled after the existing program at the Harney Lane Landfill and included as Appendix D. Any designated or infectiouswaste received at the landfill will be intercepted and sent to Forword, Inc., a Class II facility in the county. 3.2 WASTE DECOMPOSITION Since municipal refuse is a heterogeneous mixture with widely varying compo- nents and water content, it is not possible to accurately predict waste decompo- sition products, or the time necessary for complete decomposition of refuse at the site. In general, solid wastes deposited in a landfill degrade biologically and chemically to produce solid, liquid, and gaseous products. This degradation also causes the landfill surface to settle approximately 15 to 25 percent of the initial refuse depth. Biological activity within a landfill generally follows a set pattern. Solid waste initially decomposes aerobically, but as the oxygen supply is ex- hausted, facultative and anaerobic microorganisms predominate, and produce methane gas. Characteristic products of aerobic waste decomposition are car- bon dioxide, Water, and nitrogen. Characteristic products of anaerobic waste decomposition are methane, carbon dioxide, water, organic acids, nitrogen, am- PJ9 9390218A.00W 16 Rev. 0 July 20, 1989