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EPA/AR RIN: 2060-AF76 Publication ID: Spring 1998 
Title: Control of Emissions of Air Pollution from Highway Heavy-Duty Engines and Diesel Engines 
Abstract: The primary focus of this action will be reducing emissions of nitrogen oxides (NOx), non-methane hydrocarbon (NMHC) and particulate matter (PM) from diesel and gasoline fueled engines used in highway trucks and buses and in nonroad equipment and vehicles. Nitrogen oxides are a significant contributor to urban ozone pollution (smog), acid rain, and particulate pollution. Particulates, including those emitted directly and secondary particulates formed in the atmosphere, have been associated with increased death and illness rates as well as impaired visibility. Non-Methane hydrocarbons also contribute to ozone pollution. Highway and nonroad engines and vehicles are very significant contributors to these air-quality problems. This initiative has been marked by an unprecedented degree of cooperation between EPA, the State of California, and the engine manufacturing industry, as well as the involvement of States, regional air-management organizations, and public interest and environmental organizations. The result has been a plan for very stringent new emission standards that have the support of the industry. EPA has proposed new standards for highway truck and bus engines, and discussions are progressing toward similar standards for nonroad diesel engines. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: Not yet determined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: Clean Air Act sec 202(a)    Clean Air Act sec 211(c)    Clean Air Act sec 213(a)    Clean Air Act sec 301(a)   
Legal Deadline:
Action Source Description Date
Final  Judicial    08/29/1997 
Timetable:
Action Date FR Cite
ANPRM  08/30/1995  60 FR 45580   
NPRM Highway  06/27/1996  61 FR 33421   
ANPRM Nonroad  01/02/1997  62 FR 200   
NPRM  09/24/1997  62 FR 50152   
NPRM Nonroad  09/24/1997  62 FR 50152   
Final Highway  10/21/1997  62 FR 54694   
NPRM Highway Heavy Duty Diesel  12/00/1998    
Final Rule Highway Heavy Duty Diesel  12/00/1999    
Additional Information: SAN No. 3645 ^PThe rule on Nonroad Diesel Engines will be published separately under RIN# 2060-AF76. ^PRFA: Y
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Included in the Regulatory Plan: Yes 
Agency Contact:
Tad Wysor
Environmental Protection Agency
Air and Radiation
USEPA,
Ann Arbor, MI 48105
Phone:734 214-4332
Fax:734 214-4816
Email: wysor.tad@epa.gov