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EPA Amends Widely-Applicable Air Emission and Performance Standards Applicable to Stationary Internal Combustion Engines

On Jan. 14, Environmental Protection Agency Administrator Jackson signed a final rule amending the widely-applicable stationary internal combustion engine emission and performance standards set forth in 40 CFR Part 63, Subpart ZZZZ and 40 CFR Part 60, Subparts IIII and JJJJ to provide limited relief from certain requirements applicable to owners and operators facing upcoming 2013 compliance deadlines under the standards.

Of significance to a large number of covered sources, the EPA declined to finalize its May 2012 proposal that would have allowed existing emergency engines located at area sources of hazardous air pollutants to include peak shaving in the 50 hours of non-emergency operation allowed for such engines until April 2017. However, in consideration of the short time between the final rule and the May/October 2013 compliance dates for those engines, the EPA did finalize an amendment allowing those engines to be used for limited peak shaving or non-emergency demand response until May 3, 2014 where certain conditions are met.

The final rule otherwise makes several changes to the standards, including:

  1. broadening the circumstances under which emergency engines may operate as part of an emergency demand response or similar program, with conditions;
  2. adding an alternate demonstration method for formaldehyde emission standards applicable to certain large spark ignition non-emergency engines; and
  3. relaxing the standards applicable to certain large, existing area source spark ignition engines.

The final rule also makes several miscellaneous corrections and revisions to the standards. The final rule will become effective 60 days after it is published in the Federal Register.

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