Standards of Performance for Stationary Compression Ignition and Spark Ignition Internal Combustion Engines

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency 40 CFR Parts 60, 1039, 1042, 1065, and 1068 [EPA-HQ-OAR-2010-0295, FRL-9156-4] RIN 2060-AP67 AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing revisions to the standards of performance for new stationary compression ignition internal combustion engines under section 111(b) of the Clean Air Act. The proposed rule would implement more stringent standards for stationary compression ignition engines with displacement greater than or equal to 10 liters per cylinder and less than 30 liters per cylinder, consistent with recent revisions to standards for similar mobile source marine engines. The action also proposes to provide additional flexibility to owners and operators of affected engines, and would correct minor mistakes in the initial standards of performance. In addition, the action proposes revisions to the requirements for engines with displacement at or above 30 liters per cylinder to align more closely with recent standards for similar mobile source marine engines, and for engines in rural portions of Alaska that are not accessible by the Federal Aid Highway System. Finally, the proposal would make minor revisions to the standards of performance for new stationary spark ignition internal combustion engines to mirror certain revisions proposed for compression ignition engines, which would provide consistency where appropriate for the regulation of stationary internal combustion engines. The propos…