1. Clean Air Act. 42 U.S.C. 7401-7671 (1970) (Amended 1977 1990).
2. Resource Conservation and Recovery Act (RCRA). 42 U.S.C. 6901-6991i (1976) (Amended 1984).
3. Clean Water Act. 33 U.S.C. 1251-1387 (1972).
4. National Academy of Sciences. Risk assessment in the federal government: managing the process. Washington:National Academy Press 1983.