General Approach to the Example Applications

Classification of a given waste is based on an evaluation of the risk index specified in Equations 6.4, 6.5 and 6.6 for assumed types of disposal systems. If the risk index is less than unity, the waste is acceptable for inclusion in the associated waste class otherwise, the waste generally requires a more protective disposal system and would be placed in a class for more hazardous wastes. The appropriate classification depends on the level of protection required which, in turn, depends on the characteristics of the waste relative to the capabilities of assumed disposal technologies. This concept is a fundamental part of the risk index. General assumptions about 

1 Exempt Waste. When wastes that contain small amounts of radionuclides are considered for disposal in a landfill for nonhaz-ardous waste, the allowable dose may be the same as that specified 

High-hazard Disposal in a Intrusion Not applicable Most 

Similar considerations should apply to waste that contains small amounts of hazardous chemicals that might be sent to a disposal facility for nonhazardous waste. Allowable doses could correspond to a negligible lifetime risk of about 10 5 in the case of substances that induce stochastic effects or an intake at an RfD (Section 3.2.1.2) in the case of substances that induce deterministic effects. The considerations of exposure scenarios should be the same as in the case of radioactive wastes. 

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