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EPA/OAR RIN: 2060-AU79 Publication ID: Fall 2020 
Title: Revising Certain Unclassifiable Area Designations From EPA's Round 2 Air Quality Designations for the 2010 1-Hour SO2 Primary NAAQS 

On June 30, 2016, the EPA Administrator signed a final action designating certain areas in the United States for the 2010 1-hour primary sulfur dioxide (SO2) National Ambient Air Quality Standard. In the final action we explained that EPA expects to receive additional air quality characterization for many of the areas being designated, and that the agency could consider such data that corresponds to those areas being designated unclassifiable in future actions that assess the areas' air quality status. With this action, EPA plans to revise certain unclassifiable area designations in the June 2016 final action that have since collected at least three years of air quality monitoring information to characterize SO2 air quality pursuant to EPA's Data Requirements Rule (80 FR 51052).

Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Not subject to, not significant 
CFR Citation: 40 CFR 51   
Legal Authority: 23 U.S.C. 101    42 U.S.C. 7401 to 7671q   
Legal Deadline:  None
Action Date FR Cite
NPRM  09/02/2020  85 FR 54517   
Final Rule  12/00/2020 
Additional Information: Docket #:EPA-HQ-OAR-2020-0037
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Corey Mocka
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-01,
Research Triangle Park, NC 27709
Phone:919 541-5142