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EPA/AR

RIN: 2060-AO02

Publication ID: Spring 2008

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. These increments follow the three-tiered area classification system established by Congress in Section 163 of the CAA. Class I areas include certain national parks and wilderness areas that were designated by Congress as areas of special national concern, where the need to prevent air quality deterioration is the greatest. Class II areas are all areas not specifically designated in the CAA as Class I areas, and Class III areas are the ones originally designated as Class II, where higher levels of industrial development (and emission growth) are desired. In this rulemaking, we will finalize refinements to several aspects of the method that may be used to calculate an increase in concentration for increment purposes. These refinements are intended to clarify how States and regulated sources may calculate increases in concentration for purposes of determining compliance with the PSD increments.
Agency: Environmental Protection Agency(EPA)	Priority: Other Significant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Final Rule Stage
Major: No	Unfunded Mandates: No
CFR Citation: 40 CFR 51
Legal Authority: CAATitle I, Part C

Legal Deadline: None

Timetable:

Action	Date	FR Cite
NPRM	06/06/2007	72 FR 31372
Final Action	10/00/2008

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 Deroek Environmental Protection Agency Air and Radiation C504-03, RTP, NC 27711 Phone:919 541-5593 Fax:919 541-5509 Email: deroek.dan@epa.gov