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EPA/OAR RIN: 2060-AW00 Publication ID: Spring 2024 
Title: Air Quality: Revision to the Regulatory Definition of Volatile Organic Compounds - Exclusion of (Z)-1-Chloro-2,3,3,3,-Tetrafluoropropene (HCFO-1224yd (Z) 
Abstract: This action proposes to revise EPA's definition of Volatile Organic Compounds (VOC) with respect to requirements for preparing State Implementation Plans (SIPs) to attain the National Ambient Air Quality Standards (NAAQS) for ozone. The action would add (Z)-1-Chloro2,3,3,3,-Tetrafluoropropene (also known as HCFO-1224yd (Z); CAS # 111512-60-8) to the list of compounds excluded from the definition of VOC on the basis that this compound makes a negligible contribution to tropospheric ozone formation. This compound is not regulated as a hazardous air pollutant and is unlikely to contribute to stratospheric ozone depletion. It has low global warming potential compared to other compounds for which it can be used as a substitute. The VOC exemption petition was submitted by AGC Chemicals Americas, Inc., on July 29, 2020. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 51.100(s)   
Legal Authority: 42 U.S.C. 7401 et seq. Clean Air Act   
Legal Deadline:
Action Source Description Date
None       
Timetable:
Action Date FR Cite
NPRM  10/00/2024 
Final Rule  10/00/2025 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: State 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Souad Benromdhane
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-07,
Research Triangle Park, NC 27711
Phone:919 541-4359
Email: benromdhane.souad@epa.gov

Robert J. Wayland
Environmental Protection Agency
Office of Air and Radiation
C439-01,
Research Triangle Park, NC 27711
Phone:919 541-1045
Email: wayland.robertj@epamail.epa.gov