Top Priority Criteria

A complete list of the evaluation criteria used by the committee in this report and the previous report (NRC, 2001a) appears at Appendix E. The committee gave the top priority criteria more weight than the important criteria. 

TOP PRIORITY CRITERIA Relatively Safe Processes (Low Risk)... 

Once the selected technologies had been evaluated according to top priority criteria, they were evaluated by the important criteria. 

The conunittee s criteria were based on best practices in the chemical indnstry, inclnding a criterion based on pollution prevention (e.g., minimizing the volume of material that must be added at the front end of the process and minimizing the prodnction of high-temperature vapor streams at the back end of the process). The conunittee divided the best practices into two categories top priority criteria and important criteria. The top priority criteria are ... 

TABLE 4-5a Solvated-Electron Technology Top Priority Criteria... 

The utility of this new list was analyzed in a similar manner to the previous list and a graph of this is shown in Fig. 44.1. The first 10 priority substances account for 45% of spill numbers and 24% of spill volume. The first 50 substances account for 80% of spiU numbers and 79% of spill volume. The 150 top priority chemicals account for 92% of spUl numbers and 91% of spill volume. This utility is about the same as the previous priority fist and easily satisfies the starting criteria. 

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