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EPA/AR RIN: 2060-AR28 Publication ID: Spring 2013 
Title: PSD for Particulate Matter Less Than 2.5 Micrometers (PM2.5)-Increments, Significant Impact Levels (SILs) and Significant Monitoring Concentration: Reconsideration 
Abstract: This rulemaking is in response to the January 22, 2013, U.S. Court of Appeals for the District of Columbia Circuit decision that vacated the Significant Monitoring Concentrations (SMCs) and two provisions in EPA's prevention of significant deterioration (PSD) regulations containing Significant Impact Levels (SILs) that were contained in the 2010 final rule promulgating fine particulate matter (PM2.5) increments, SMCs, SILs, and for PM2.5. (Sierra Club v. EPA, No. 10-1413 (D.C. Circuit), 2013 WL 216018). This rulemaking will remove the PM2.5 SMCs from the PSD regulations, and address the court's decision regarding SILs. This rulemaking will also repropose for public comment two provisions of the rule that were not addressed in that court decision. The reason that EPA is reproposing these two provisions is because the Texas Commission on Environmental Quality (TCEQ) filed a Petition for Reconsideration to the Administrator regarding several provisions contained in the 2010 final rule. In response to the TCEQ petition, EPA agreed to reconsider, by reproposing, the following three provisions: 1) The revised definition of "baseline area" that includes a new significance level for PM2.5, which is used for determining whether a particular attainment or unclassifiable area should be included in the baseline area for the PM2.5 increments; 2) the requirement that PM2.5 precursor emissions be included in the significant impact analysis; and 3) the level selected for the Significant Monitoring Concentration for PM2.5. In each case, the TCEQ claimed that EPA did not provide an opportunity for public comment prior to issuing the provisions as part of the 2010 final rule. The third of these claims by TCEQ has subsequently been made moot by the court decision saying that no PM2.5 SMCs are allowed under the Clean Air Act. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 57.100   
Legal Authority: 42 USC 7401   
Legal Deadline:  None
Action Date FR Cite
NPRM  05/00/2014 
Final Rule  To Be Determined 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Dan Deroeck
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-5593
Fax:919 685-3009

Chuck Buckler
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-0873
Fax:919 541-5509

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