“…1 we present our perspective of the ro le science should play in a risk management problem. We find this perspective generally consistent with comments ofLevin (1992), Russell ( 1992), Cowling ( 1992), and Loucks ( 1992), based on their experience with NA-PAP. There are three major factors to be considered in evaluating a cleanup scenario: ( 1) scientific and technical input, (2) regulatory constraints, and (3) politica!, economic, and social in put.…”