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EPA/AR RIN: 2060-AP38 Publication ID: Spring 2014 
Title: Review of the National Ambient Air Quality Standards for Ozone 
Abstract: Under the Clean Air Act, EPA is required to review and, if appropriate, revise the air quality criteria for the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) every 5 years. On March 23, 2008, the EPA published a final rule to revise the primary and secondary NAAQS for ozone to provide increased protection of public health and welfare. With regard to the primary standard for ozone, EPA revised the level of the 8-hour ozone standard to 0.075 ppm. With regard to the secondary ozone standard, EPA made it identical in all respects to the primary ozone standard, as revised. The D.C. Circuit upheld the primary standard, but remanded the secondary standard back to EPA. EPA initiated the current review in October 2008 with a workshop to discuss key policy-relevant issues around which EPA would structure the review. This review includes the preparation of an Integrated Science Assessment, Risk/Exposure Assessment, and a Policy Assessment Document by EPA, with opportunities for review by EPA's Clean Air Scientific Advisory Committee and the public. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: 40 CFR 50   
Legal Authority: 42 USC 7408    42 USC 7409   
Legal Deadline:
Action Source Description Date
Action Date FR Cite
Notice  04/28/2011  76 FR 23755   
NPRM  12/00/2014 
Additional Information: Docket #:EPA-HQ-OAR-2008-0699
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Susan Stone
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-1146
Fax:919 541-0237

Karen Martin
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-5274
Fax:919 541-0237