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EPA/AR RIN: 2060-AO38 Publication ID: Spring 2010 
Title: Control of Emissions From New Marine Compression-Ignition Engines At or Above 30 Liters Per Cylinder 
Abstract: Category 3 marine diesel engines (those with per cylinder displacement greater than 30 liters) are very large engines that are used for propulsion power in ocean-going vessels. Emissions from these engines contribute significantly to unhealthful levels of ambient particulate matter and ozone in many parts of the United States. These engines are highly mobile and are not easily controlled at a state or local level. EPA currently regulates emissions from Category 3 marine diesel engines on ships flagged in the United States. This rulemaking will consider long-term nitrogen oxides (NOx) standards for new Category 3 marine diesel engines that would require the use of high efficiency aftertreatment technology. We are considering standards equivalent to the limits for NOx recently adopted by the International Maritime Organization, which are based on the position advanced by the United States Government as part of the international negotiations. We are also considering a revision to our diesel fuel program under the Act to allow for the manufacture and sale of marine diesel fuel with a sulfur content up to 1,000 ppm for use in Category 3 engines. The proposal would be part of a coordinated strategy, the other components of which would consist of the new amendments to MARPOL Annex VI that will extend these standards to foreign vessels (through the Act to Prevent Pollution from Ships) and pursuing Emission Control Area (ECA) designation for U.S. coastal areas in accordance with MARPOL Annex VI. Implementation of this coordinated strategy will ensure that all ships that affect U.S. air quality meet stringent NOx and fuel sulfur requirements. A recent D.C. Circuit decision (February 2009) upheld EPA's deadline of 12/17/09 based on EPA's commitment in the regulation to meet that deadline for the final Category 3 rule. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 1042; 40 CFR 1065; 40 CFR 94; 40 CFR 80 
Legal Authority: 42 USC 7547; 42 USC 7545 
Legal Deadline:
Action Source Description Date
Final  Judicial    12/17/2009 
Timetable:
Action Date FR Cite
ANPRM  12/07/2007  72 FR 69521 
ANPRM Comment Period End  03/06/2008   
NPRM  08/28/2009  74 FR 44441 
NPRM Comment Period End  09/28/2009   
Final Action  04/00/2010   
Additional Information: SAN No. 5129; EPA publication information: ANPRM - http://www.epa.gov/fedrgstr/EPA-AIR/2007/December/Day-07/a23556.htm; EPA Docket information: EPA-HQ-OAR-2007-0121.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: Businesses  Federalism: No 
Included in the Regulatory Plan: Yes 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL: www.epa.gov/otaq/oceanvessels.htm  
RIN Data Printed in the FR: No 
Agency Contact:
Jean Revelt
Environmental Protection Agency
Air and Radiation
OAR/OTAQ/ASD,
Ann Arbor, MI 48105
Phone:734 214-4822
Fax:734 214-4050
Email: revelt.jean-marie@epa.gov

Michael Samulski
Environmental Protection Agency
Air and Radiation
USEPA,
Ann Arbor, MI 48105
Phone:734 214-4532
Email: Samulski.Michael@epamail.epa.gov

 
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