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EPA/OAR RIN: 2060-AW01 Publication ID: Spring 2023 
Title: ●National Emission Standards for Hazardous Air Pollutants for the Polyether Polyols Production Industry 

This action will address the agency’s technology review of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for subpart PPP in 40 CFR part 63 that applies to the Polyether Polyols Production industry. The Polyether Polyols Production (PEPO) NESHAP was promulgated pursuant to section 112(d) of the Clean Air Act (CAA) on June 1, 1999, and most recently, the agency conducted its residual risk and technology review (RTR) of the PEPO NESHAP on March 27, 2014. The PEPO MACT standards apply to major sources and regulate hazardous air pollutant (HAP) emissions resulting from the production of chemical products formed by the reaction of ethylene oxide, propylene oxide or other cyclic ethers with compounds having one or more reactive hydrogens. The HAP emission sources at PEPO production facilities include process vents, storage vessels, equipment leaks, wastewater, and heat exchange systems. The HAP emitted by the facilities producing polyether polyols include, but are not limited to, ethylene oxide, propylene oxide, hexane, and toluene. This action will implement the technology review requirements of CAA section 112(d)(6). CAA section 112(d)(6) requires the EPA to review and revise the MACT standards as necessary, taking into account developments in practices, processes and control technologies, no less often than every 8 years. The agency also plans to conduct a residual risk assessment to consider risks from the polyether polyols production source category during its technology review.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
CFR Citation: 40 CFR 63   
Legal Authority: Clean Air Act sec. 112   
Legal Deadline:  None
Action Date FR Cite
NPRM  12/00/2023 
Final Rule  10/00/2024 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
Sectors Affected: 325199 All Other Basic Organic Chemical Manufacturing 
RIN Data Printed in the FR: No 
Agency Contact:
Tegan Lavoie
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code E143-01,
Research Triangle Park, NC 27711
Phone:919 541-5110

Johanna Klein
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-2283