National Emission Standards for Hazardous Air Pollutants: Publicly Owned Treatment Works

The Environmental Protection Agency (EPA) is proposing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Publicly Owned Treatment Works (POTW) to address the results of the residual risk and technology review (RTR) conducted under the Clean Air Act (CAA). As a result of our review, we are proposing to include pretreatment requirements to limit emissions from collection systems and the POTW treatment plant; requirements for existing, new, or reconstructed industrial (Group 1) POTW to comply with both the requirements in this rule and those in the applicable NESHAP for which they act as control; and hazardous air pollutants (HAP) emission limits for existing, non-industrial (Group 2) POTW. In addition, the EPA is proposing to revise the applicability criteria, revise the names and definitions of the industrial (Group 1) and non- industrial (Group 2) subcategories, revise regulatory provisions pertaining to emissions during periods of startup, shutdown, and malfunction, add requirements for electronic reporting, and make other miscellaneous edits and technical corrections.