Pursuant to Clean Air Act (“CAA”) section 307(d)(7)(B), 42 U.S.C. § 7607(d)(7)(B), and for the reasons set forth below, the Interstate Natural Gas Association of America (“INGAA”) petitions the Administrator of the United States Environmental Protection Agency (“EPA”) to reconsider specific provisions of its Final Rule in “National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines,” 75 Fed. Reg. 51570 (August 20, 2010). INGAA is filing this petition to voice objections that could not have been raised during the public comment period because they concern Final Rule provisions that were not properly noticed in the proposed rule, 71 Fed. Reg. 9698 (March 5, 2009) (the “Proposed Rule”). The issues detailed below are of central relevance to the outcome of this rulemaking, and reconsideration should be granted to address them. Because we anticipate these issues will require further discussion of a technical in nature, we would welcome the opportunity to meet with EPA to discuss our concerns further.