the number one environmental problem. In the United States, a national cleanup effort has
begun under CERCLA, the Comprehensive Environmental Response, Compensation and
Liability Act (42 USC 9601 et seq., 1980), commonly known as Superfund, and its
subsequent reauthorization under SARA, the Superfund Amendments Reauthorization Act
(PL 99–499, October 17, 1986). Over 30 000 sites have been identified, each having the …