2023-07188: New Source Performance Standards for the Synthetic Organic Chemical Manufacturing Industry and National Emission Standards for Hazardous Air Pollutants for the Synthetic Organic Chemical Manufacturing Industry and Group I & II Polymers and Resins Industry

Summary

The U.S. Environmental Protection Agency (EPA) is proposing amendments to the New Source Performance Standards (NSPS) that apply to the Synthetic Organic Chemical Manufacturing Industry (SOCMI) and to the National Emission Standards for Hazardous Air Pollutants (NESHAP) that apply to the SOCMI (more commonly referred to as the Hazardous Organic NESHAP or HON) and Group I and II Polymers and Resins Industries (P&R I and P&R II). The EPA is proposing decisions resulting from the Agency's technology review of the HON, P&R I, and P&R II, and its eight-year review of the NSPS that apply to the SOCMI. The EPA is also proposing amendments to the NSPS for equipment leaks of volatile organic compounds (VOC) in SOCMI based on its reconsideration of certain issues raised in an administrative petition for reconsideration. Furthermore, the EPA is proposing to strengthen the emission standards for ethylene oxide (EtO) emissions and chloroprene emissions after considering the results of a risk assessment for the HON and Neoprene Production processes subject to P&R I. Lastly, the EPA is proposing to remove exemptions from standards for periods of startup, shutdown, and malfunction (SSM), to add work practice standards for such periods where appropriate, and to add provisions for electronic reporting. We estimate that the proposed amendments to the NESHAP would reduce hazardous air pollutants (HAP) emissions (excluding EtO and chloroprene) from the SOCMI, P&R I, and P&R II sources by approximately 1,123 tons per year (tpy), reduce EtO emissions from HON processes by approximately 58 tpy, and reduce chloroprene emissions from Neoprene Production processes in P&R I by approximately 14 tpy. We also estimate that these proposed amendments to the NESHAP will reduce excess emissions of HAP from flares in the SOCMI and P&R I source categories by an additional 4,858 tpy. Lastly, we estimate that the proposed amendments to the NSPS would reduce VOC emissions from the SOCMI source category by approximately 1,609 tpy.

The agency’s own summary, as published.

What this changes

Amends 2 parts of the Code of Federal Regulations — the standing rules this notice rewrites.

• 40 CFR 60 Standards of Performance for New Stationary Sources
• 40 CFR 63 National Emission Standards for Hazardous Air Pollutants for Source Categories