National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines
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Stationary engines use pistons that alternately move back and forth to convert pressure into rotating motion. They are used in a variety of applications from generating electricity to powering pumps and compressors in power and manufacturing plants. They are also used in the event of an emergency such as fire or flood.
The key pollutants EPA regulates from these sources includes formaldehyde, acetaldehyde, acrolein, methanol, polycyclic aromatic hydrocarbon (PAH), volatile organic compounds (VOC), carbon monoxide (CO), nitrogen oxide (NOx) and particulate matter (PM).
The National Emission Standards for Hazardous Air Pollutants (NESHAP) for Reciprocating Internal Combustion Engines (RICE) are outlined in the Code of Federal Regulations under 40 CFR 63 Subpart ZZZZ.
The following is a timeline of regulatory actions that have formed the current NESHAP for RICE, beginning with the most recent actions.
- August 10, 2022 - EPA finalized a rule removing the vacated provisions
- August 15, 2014 - EPA issued a final decision on reconsideration of the final amendments to the regulations for existing SI RICE
- January 30, 2013- EPA finalized amendments to the regulations
- August 20, 2010 - EPA finalized regulations for exisiting stationary spark ignition (SI) RICE
- March 3, 2010 - EPA finalized regulation for the exisiting stationary compression ignition (CI) RICE
- Final Rule - March 3, 2010
- Final Rule Correction - June 30, 2010
- Proposed Rule - March 5, 2009
- Advanced Notice of proposed Rulemaking - January 24, 2008
- January 18, 2008 - EPA finalized regulations for new RICE less than or equal to 500 HP located at major sources and new RICE located at area sources
- June 15, 2004 - EPA finalized the first regulation for stationary RICE greater than 500 horsepower (HP) located at major sources of HAP