Schedule for Standards: Methodology and Results for Ranking Source CategoriesBased on Environmental Effects Data

摘要

In developing the source category schedule for emission standards, the EPAdeveloped the source category ranking system (SCRS) to help prioritize source categories. In response to public comments that the SCRS did not specifically consider environmental effects as required under section 112 of the Clean Air Act, the U.S. Environmental Protection Agency (EPA) conducted a ranking of source categories based on readily available environmental effects. This document explains the methodology for this ranking.