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EPA/AR RIN: 2060-AO96 Publication ID: Fall 2011 
Title: Implementation of the 1997 8-Hr Ozone NAAQS: Classification of Subpart 1 Areas and Revision to AntiBacksliding Provisions; Deletion of Obsolete 1-Hr Ozone Standard Provisions 
Abstract: This final action would revise the rule for implementation of the 1997 8-hour ozone national ambient air quality standard (NAAQS) to address several issues vacated by the U.S. Circuit Court of Appeals for the District of Columbia Circuit. The rulemaking would remove the portions of the regulatory text vacated by the Court. The rule would also address: (1) the classification system for nonattainment areas that the implementation rule originally covered under Clean Air Act (CAA) title I, part D, subpart 1; and (2) contingency measures that apply as anti-backsliding measures under the now-revoked 1-hour standard. The rule would also remove an obsolete provision in the 1-hour ozone standard itself (40 CFR 50.9(c)). 
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    40 CFR 50    40 CFR 81   
Legal Authority: 42 USC 7410    42 USC 7511 to 7511f    42 USC 7601(a)(1)   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  01/16/2009  74 FR 2936   
NPRM Comment Period End  02/17/2009    
Final Action  12/00/2011    
Additional Information: EPA publication information: NPRM - http://www.regulations.gov/search/Regs/home.html#documentDetail?R=09000064808228f1; EPA Docket information: EPA-HQ-OAR-2007-0956
Regulatory Flexibility Analysis Required: Yes  Government Levels Affected: Local, State 
Small Entities Affected: Governmental Jurisdictions  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: Yes 
Agency Contact:
Lynn Dail
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-01,
Research Triangle Park, NC 27711
Phone:919 541-2363
Fax:919 541-0824
Email: dail.lynn@epamail.epa.gov

Patrick Lessard
Environmental Protection Agency
Air and Radiation
C539-01,
Research Triangle Park, NC 27711
Phone:919 541-5383
Fax:919 541-4028
Email: lessard.patrick@epa.gov