This text explores how the US Environmental Protection Agency EPA can improve its risk assessment practices under the 1990 Clean Air Act Amendments and other regulatory statutes. It examines the assumptions made in risk analysis, how to deal with uncertainty, and other basic concepts, such as "inference assumptions", "default options", and the historical, social and regulatory contexts of risk assessment and risk management.
Part 1: current approaches to risk assessment; risk assessment and its social and regulatory contexts; exposure assessment; assessment of toxicity; risk characterization. Part 2: strategies for improving risk assessment; default options; models, methods and data; data needs; uncertainty; variability; aggregation. Part 3: implementation of findings; implementation.