SCRAM: A scoring and ranking system for persistent, bioaccumulative, and toxic substances for the North American Great Lakes - Part II. Bioaccumulation potential and persistence

Part I (SNYDER ET AL., 1999a) of this series introduced SCRAM, a chemical s coring and ranking system for contaminants of the North American Great Lake s. Here, in Part II, scoring of the bioaccumulation potential and persisten ce of chemicals is discussed, including acceptable types of data, specific scoring instructions, and the basis for criteria and scores for these categ ories of the system. Difficulties encountered during the process of determi ning which types of data adequately represent the properties of interest ar e discussed. Also, justification is given for an emphasis on scoring on the basis of persistence.