SCRAM: A scoring and ranking system for persistent, bioaccumulative, and toxic substances for the North American Great Lakes Part IV. Results from representative chemicals, sensitivity analysis, and discriminatory power

The Chemical Scoring and Ranking Assessment Model (SCRAM) has been describe d in Parts I-m of this series (SNYDER ET AL., 1999a; 1999b; 1999c). SCRAM i s a chemical scoring and ranking (CSR) system that scores chemicals on the basis of bioaccumulation potential, environmental persistence, and toxicity . Part N describes various tests and descriptions of the performance of thi s system. A group of 21 representative chemicals was chosen and scored to t est the system. For those chemicals, the percentages of the scores associat ed with fate-related properties and associated with data uncertainty were d etermined. The scoring of four of these chemicals is described in greater d etail, and the suitability of the scores is discussed. An analysis of the s ensitivity of the system to incomplete data sets is presented. And finally, the discriminatory power of the system is described.