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EPA/AR RIN: 2060-AQ38 Publication ID: Fall 2010 
Title: ●Revision to Definition of Volatile Organic Compounds—Exclusion of trans 1,3,3,3-tetrafluoropropene and 2,3,3,3-tertrafluoropropene 
Abstract: This action proposes to add trans 1,3,3,3-tetrafluoropropene and 2,3,3,3-tertrafluoropropene to the list of negligibly reactive compounds in the definition of volatile organic compounds. Data indicate that the photochemical reactivity of these compounds is low enough that they can be regarded as negligibly reactive in ozone formation and will not contribute to violations of the ozone national ambient air quality standard. The compound 2,3,3,3-tertrafluoropropene has been identified as a possible substitute for a high global warming compound which is currently used in automobile air conditioners. 
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: No  Unfunded Mandates: No 
CFR Citation: Not Yet Determined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: Section 302(s) of the CAA   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  04/00/2011    
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
William L Johnson
Environmental Protection Agency
Air and Radiation
C539-01,
Research Triangle Park, NC 27525
Phone:919 541-5245
Fax:919 541-0824
Email: johnson.williaml@epamail.epa.gov

Geoffrey Wilcox
Environmental Protection Agency
Air and Radiation
1200 Pennsylvania Ave, NW,
RTP, NC 27711
Phone:202-564-5601
Email: Wilcox.Geoffrey@epamail.epa.gov