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New EPA Rules On Stationary Reciprocating Internal Combustion Engines...Just Announced.

Tuesday January 15, 2013

If you have stationary  reciprocating internal combustion engines (gasoline or diesel) for standby generators,  pumps, etc, these January 14, 2013 final revisions to the National Emission Standards for Hazardous Air Pollutants may apply to you.


Remote and non- remote existing stationary diesel fueled/compression ignition and existing stationary gas fired spark ignition engines.

Emissions Limit and Monitoring

- For non-remote installations: replacing emission limits with an equipment standard (requiring HAP catalysts) for existing engines above 500 HP at area sources

  • Initial compliance test;
  • Annual catalyst activity test;
  • Catalyst temperature monitor or high temperature shutdown device required.

- Existing compression ignition engines above 300 HP that were certified to meet Tier 3 (Tier 2 for engines above 560 kW) and installed prior to June 12 , 2006 are in compliance with this new rulemaking.

- Specifying that existing stationary Tier 1 and Tier 2 certified CI engines located at area sources of HAP that are subject to state and local requirements requiring replacement of the engine can meet management practices until January 1, 2015, or 12 years after installation date (whichever is later), but not later than June 1, 2018, after which time the CO emission standards in Table 2d of subpart ZZZZ apply.


- An alternative compliance demonstration option for stationary 4 cycle rich burn spark emission engines subject to a 76 percent or more formaldehyde reduction emission standard

- Total Hydrocarbon emissions demonstrated to be 30 percent reduced.

Emergency Demand Response and Peak Shaving

- A change to allow operation of Remote engines up to 100 hours per year for monitoring and testing emergency operations and (voltage support)

- A temporary limited allowance expiring April, 2017 for stationary emergency engines at non remote locations to be used up to 50 hours per year for any non-emergency purpose including peak shaving. The 50 hours is part of the 100 hours per year total allowance for monitoring and testing, demand response and voltage change situations.

- Other definitions and conditions are changed in this new rule.

Contact Information

  • Miles Free, PMPA Director of Industry Research & Technology
  • 440-526-0300