Implementation of the New Source Review (NSR) Program for Particulate Matter Less Than 2.5 Micrometers (PM2.5): Amendment to the Definition “Regulated NSR Pollutant” Concerning Condensable Particulate Matter

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 51 and 52 [EPA-HQ-OAR-2003-0062; FRL-9648-1] RIN 2060-AR30 AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: The EPA is proposing to revise the definition “regulated NSR pollutant” contained in two sets of Prevention of Significant Deterioration (PSD) regulations and in the EPA's Emission Offset Interpretative Ruling. This revision would correct an inadvertent error made in 2008 when the EPA issued its final rule to implement the new source review (NSR) program for fine particles with an aerodynamic diameter of less than or equal to 2.5 micrometers (PM 2.5 ). Effectively, this revision would reestablish the interpretation that for measurement of “particulate matter emissions” in the context of the PSD and NSR regulations there is no explicit requirement to include measurement of condensable PM. However, the condensable portion would continue to be required for emissions of particles with an aerodynamic diameter of less than or equal to 10 micrometers (PM 10 ) and PM 2.5 . DATES: Comments must be received on or before May 15, 2012. Public Hearing. If anyone contacts the EPA requesting the opportunity to speak at a public hearing concerning the proposed regulation by March 26, 2012, the EPA will hold a public hearing approximately 30 days after publication in the Federal Register . Additional information about the hearing would be published in a subsequent Federal Register notice. …