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EPA/OAR RIN: 2060-AU67 Publication ID: Spring 2021 
Title: National Emission Standards for Hazardous Air Pollutants: Refractory Products Manufacturing Residual Risk and Technology Review 
Abstract: This action will address the agency's residual risk and technology review (RTR) of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Refractory Products Manufacturing. The Refractory Products Manufacturing NESHAP, 40 CFR Part 63 subpart SSSSS, was promulgated pursuant to section 112(d) of the Clean Air Act (CAA) on April 16, 2003. The NESHAP established emission limitations and work practice requirements based on maximum achievable control technology (MACT) for controlling emissions of hazardous air pollutants (HAP) from ovens, kilns, preheaters, and dryers. The HAP emitted from ovens, kilns, preheaters, and dryers include: ethylene glycol, formaldehyde, HF, HCl and phenol. This action will implement the residual risk review requirements of CAA section 112(f)(2) and the technology review requirements of CAA section 112(d)(6). The statute directs the EPA to promulgate emission standards under CAA 112(f)(2) if such standards are required to provide an ample margin of safety to protect public health or to prevent, taking relevant factors into account, an adverse environmental effect. Any such standards are to be promulgated within 8 years after promulgation of MACT standards under CAA section 112(d). 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. Pursuant to a court order (Community In-Power and Development Association v. Pruitt, No. 16-cv-1074KBJ (D.D.C. 2018)), the EPA is obligated to complete this final action by October 1, 2021. The EPA proposed revisions to the Refractory Manufacturing Products NESHAP based on the results of the RTR on January 14, 2021 (86 FR 3097). No public hearing was requested; however, the public comment period was extended 30 days to March 31, 2021 to provide additional time for stakeholder review and comment. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 63   
Legal Authority: 42 U.S.C. 7412 Clean Air Act   
Legal Deadline:
Action Source Description Date
Final  Judicial  16-cv-01074-KBJ; 3/31/18.  10/01/2021 
Action Date FR Cite
NPRM  01/14/2021  86 FR 3079   
NPRM Comment Period Extended  02/23/2021  86 FR 10909   
NPRM Comment Period End  03/01/2021 
NPRM Comment Period Extended End  03/24/2021 
Final Rule  10/00/2021 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Paula Hirtz
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code E143-01,
Research Triangle Park, NC 27711
Phone:919 541-2618

Keith Barnett
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-5605
Fax:919 541-4991