FIGURE 8-1 Schematic of major components included in assessment of possible health effects of waste incineration. Other important considerations such as social and economic impacts (see Chapter 7) are not included in this figure.

conceptual model (the influence diagram), formulation of the computational model, estimation of input values, and calculation and interpretation of results, including uncertainties. Uncertainty analysis should be an iterative process, moving from the identification of generic uncertainties to more refined analyses for chemical-specific or facility-specific uncertainties (NRC 1994). The use of uncertainty analysis in health risk assessment for exposure to chemical contaminants became widespread in the 1980s (Bogen and Spear 1987).



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