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EPA/AR RIN: 2060-AR59 Publication ID: 2012 
Title: ●Revision to Ambient Nitrogen Dioxide Monitoring Requirements 
Abstract: Nitrogen Dioxide (NO2) monitoring requirements were revised in February 2010 as part of the revision to the NO2 National Ambient Air Quality Standards. The revised requirements included network design elements that required monitors for characterizing concentrations near major roads, across areawide extents, and in areas with vulnerable and susceptible populations. The required deadline for the establishment of the revised NO2 network was January 1, 2013. The Annual Monitoring Network Plans addressing these revisions are due July 1, 2012, for approval by the Administrator. The EPA is proposing revisions to the deadline for the near-road element of the network which establishes a phased approach that is more practical for States to implement and for EPA to fund. These changes will establish a series of deadlines that collectively implement the near-road network between January 1, 2014, and January 1, 2017, more closely matching the schedule for anticipated EPA grant funding as well as monitoring agency capacity for implementing the new sites. No changes are being proposed for the deadline affecting the areawide and vulnerable and susceptible network elements. Additionally, no changes are being proposed to the population thresholds for monitoring finalized in the 2010 rule. The EPA is also proposing to change the Annual Monitoring Network Plan approval authority from Administrator to Regional Administrator, as was originally intended, which is consistent with the approval authority for other networks characterizing ozone and fine particles, for example. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 58   
Legal Authority: 42 USC 7403    42 USC 7410    42 USC 7601    42 USC 7611    42 USC 7619   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  10/19/2012  77 FR 64244   
Comment Period End  11/19/2012 
Final Action  01/00/2013 
Additional Information: Docket #:EPA-HQ-OAR-2012-0486
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Local, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
Public Comment URL: http://www.gpo.gov/fdsys/pkg/FR-2012-10-19/pdf/2012-25423.pdf  
Sectors Affected: 924110 Administration of Air and Water Resource and Solid Waste Management Programs 
RIN Data Printed in the FR: No 
Agency Contact:
Nealson Watkins
Environmental Protection Agency
Air and Radiation
C304-06,
Research Triangle Park, NC 27711
Phone:919 541-5522
Fax:919 541-1903
Email: watkins.nealson@epa.gov

Lewis Weinstock
Environmental Protection Agency
Air and Radiation
C304-06,
Research Triangle Park, NC 27711
Phone:919 541-3661
Fax:919 541-1903
Email: weinstock.lewis@epamail.epa.gov