On January 30, 2013, the Environmental Protection Agency (EPA) finalized amendments to the National Emission Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines and the Standards of Performance for Stationary Internal Combustion Engines. Subsequently, the EPA received three petitions for reconsideration of the final rule. On September 5, 2013, the EPA announced reconsideration of and requested public comment on three issues raised in the petitions for reconsideration. A summary of the public comments received on the September 5, 2013, notice of reconsideration and the EPA's responses to those comments (Response to Comment document) can be found in the rulemaking docket at Docket Number EPA-HQ-OAR-2008-0708. After careful consideration of the public comments received on the September 5, 2013, notice, the EPA has determined that it will not propose any changes to the regulations at this time related to the three petition issues, and is providing notice of this decision. The EPA is informing the petitioners of the decision in separate letters to the petitioners. The letters explain the EPA's reasons for not proposing changes to the regulations for those three issues. Further discussion of the three petition issues can be found in the Response to Comment document.