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EPA/AR RIN: 2060-AO02 Publication ID: Spring 2009 
Title: Prevention of Significant Deterioration: Refinement to Increment Modeling Procedures 
Abstract: Part C of title I of the Clean Air Act (CAA) contains the requirements for a component of the major New Source Review (NSR) program known as the Prevention of Significant Deterioration (PSD) program. This program sets forth procedures for the preconstruction review and permitting of new and modified major stationary sources of air pollution locating in areas meeting the National Ambient Air Quality Standards (NAAQS), i.e., "attainment" areas, or in areas for which there is insufficient information to classify an area as either attainment or nonattainment, i.e., "unclassifiable" areas. The applicability of the PSD program to a particular source must be determined in advance of construction and is pollutant-specific. The PSD program also established "increments," which are maximum increases in ambient air concentrations allowed in a PSD area over a baseline concentration. This rulemaking, which is being withdrawn, would have revised the methodology used to calculate increments. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 51   
Legal Authority: CAA title I, part C   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  06/06/2007  72 FR 31372   
Withdrawn  03/05/2009    
Additional Information: SAN No. 5100; EPA publication information: NPRM - http://www.epa.gov/fedrgstr/EPA-AIR/2007/June/Day-06/a10459.htm; EPA Docket information: EPA-HQ-OAR-2006-0888
Regulatory Flexibility Analysis Required: No  Government Levels Affected: State, Tribal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Jessica Montanez
Environmental Protection Agency
Air and Radiation
C504-03,
Research Triangle Park, NC 27711
Phone:919 541-3407
Fax:919 541-5509
Email: montanez.jessica@epa.gov

Dan Deroeck
Environmental Protection Agency
Air and Radiation
C504-03,
Research Triangle Park, NC 27711
Phone:919 541-5593
Fax:919 685-3009
Email: Deroeck.Dan@epamail.epa.gov