EPA Final Edits to 40 CFR Part 63 Subpart U

The EPA has issued final edits to 40 CFR Part 63 Subpart U, which regulates national emission standards for hazardous air pollutants (NESHAP) from specific industrial sources. The document, identified by EPA-HQ-OAR-2023-0282-0119, indicates administrative or minor technical adjustments to the existing regulation. These changes are not expected to alter the fundamental compliance requirements or scope of Subpart U.

Regulated entities operating under 40 CFR Part 63 Subpart U should review these final edits to ensure their internal documentation and compliance programs reflect any minor clarifications or corrections made. As these are final edits and not a substantive rule change, no new compliance deadlines or actions are imposed beyond ensuring awareness of the updated regulatory text. The EPA has not indicated specific penalties associated with these administrative changes.