2060-AP11 201004 Unified Agenda of Federal Regulatory and Deregulatory Actions 2060 Air and Radiation AR 2000 Environmental Protection Agency EPA Protection of Stratospheric Ozone: New Substitute in the Motor Vehicle Air Conditioning Sector Under the Significant New Alternatives Policy (SNAP) Program In this action, the Agency proposes to list the refrigerant HFO-1234yf as an acceptable substitute in motor vehicle air conditioning (MVAC) systems, and outlines the conditions necessary for its safe use. This refrigerant has very low global warming potential. Current MVAC refrigerants are highly potent greenhouse gases. Other Significant Previously Published in The Unified Agenda Final Rule Stage No No 40 CFR 82, subpart G 42 USC 7671k No NPRM 10/19/2009 74 FR 53445 NPRM Comment Period End 12/18/2009 NPRM Comment Period Reopened 12/28/2009 74 FR 68558 NPRM Comment Period End 02/01/2010 NPRM Comment Period Reopened 02/09/2010 75 FR 6338 NPRM Comment Period End 02/24/2010 Final Action 10/00/2010 SAN No. 5257; EPA publication information: NPRM - http://edocket.access.gpo.gov/2009/pdf/E9-25106.pdf; EPA Docket information: EPA-HQ-OAR-2008-0664. No No None No www.epa.gov/ozone/snap/refrigerants/lists/mvacs.html No Yes Margaret Sheppard 2060 Air and Radiation AR 202 343-9163 202 343-2338 sheppard.margaret@epa.gov 6205J, Washington DC 20460 Yaidi Cancel 2060 Air and Radiation AR 202 343-9512 202 343-2338 cancel.yaidi@epa.gov 6205J, Washington DC 20460