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EPA/AR RIN: 2060-AP36 Publication ID: Spring 2009 
Title: ●National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines 
Abstract: This proposal is intended to establish national emission standards for hazardous air pollutants (NESHAP) for existing stationary reciprocating internal combustion engines (RICE) (gas-fired and diesel) that are either located at area sources of hazardous air pollutants (HAP) emissions or that have a site rating of less than or equal to 500 brake horsepower (hp) and are located at major sources of HAP emissions. The proposal also establishes NESHAP for existing stationary compression ignition (diesel) engines with a site rating of greater than 500 brake hp that are located at major sources of HAP emissions. EPA has previously promulgated NESHAP for new stationary RICE located at major sources of HAP emissions, existing stationary spark ignition (gas-fired) engines that have a site rating of greater than 500 brake hp and are located at major sources of HAP emissions, and new stationary RICE located at area sources of HAP emissions. This regulation will complete our statutory obligation to establish NESHAP for stationary engines at major and area sources. We are also taking comment on (1) the feasibility of approaches that would further reduce the remaining diesel engine emissions (PM2.5 and black carbon), including requiring use of catalyzed diesel particulate filters; and (2) approaches that would address emissions during startup, shutdown, and malfunction periods. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: 40 CFR 63   
Legal Authority: Not Yet Determined   
Legal Deadline:
Action Source Description Date
Final  Judicial  Consent decree for NESHAP for non-emergency stationary diesel engines 300 HP or greater  02/10/2010 
NPRM  Judicial  Consent decree for NESHAP for non-emergency stationary diesel engines 300 HP or greater  02/25/2009 
Timetable:
Action Date FR Cite
NPRM  03/05/2009  74 FR 9698   
NPRM Comment Period End  05/04/2009    
Final Action  02/00/2010    
Additional Information: SAN No. 5300; EPA publication information: NPRM - http://edocket.access.gpo.gov/2009/pdf/E9-4595.pdf;
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Melanie King
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code D243-01,
Research Triangle Park, NC 27711
Phone:919 541-2469
Email: king.melanie@epa.gov

Jaime Pagan
Environmental Protection Agency
Air and Radiation
RTP, NC 27711
Phone:919 541-5340
Fax:919 541-5450
Email: pagan.jaime@epamail.epa.gov