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EPA/AR RIN: 2060-AL75 Publication ID: Spring 2006 
Title: Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation and Debottlenecking 
Abstract: These rules clarify when multiple activities at a single major stationary source must be considered together for the purposes of determining major new source review (NSR) applicability (aggregation). We are changing the way emissions from permitted emissions units upstream or downstream from those undergoing a physical change or change in the method of operation are considered when determining if a proposed project will result in a significant emissions increase (debottlenecking). The regulations for aggregation and debottlenecking are intended to improve implementation of the program by articulating principles for determining major NSR applicability that were previously addressed through guidance only. 
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 51.165    40 CFR 51.166    40 CFR 52.21   
Legal Authority: 42 USC 7401 et seq   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/00/2006    
Final Action  05/00/2007    
Additional Information: SAN No. 4793;
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: Yes 
Agency Contact:
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

Lisa Sutton
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code E143-01,
Research Triangle Park, NC 27711
Phone:919 541-3450
Email: sutton.lisa@epa.gov