Release of the Policy Assessment for the Review of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency 40 CFR Parts 50 and 58 [EPA-HQ-OAR-2013-0146; FRL-9961-20-OAR] AGENCY: Environmental Protection Agency (EPA). ACTION: Notice of availability. SUMMARY: The Environmental Protection Agency (EPA) is announcing the availability of the final document titled Policy Assessment for the Review of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen (NO 2 ( printed page 17948) PA). Nitrogen dioxide (NO 2 ) is the component of oxides of nitrogen (NO X ) for which we have the greatest concern for public health. Accordingly, the current primary (health-based) National Ambient Air Quality Standards (NAAQS) for NO X are in terms of NO 2. The NO 2 PA presents considerations and conclusions relevant for the EPA's review of the primary NO 2 NAAQS. The primary NO 2 NAAQS are set to protect the public health from exposures to NO 2 in ambient air. DATES: The NO 2 PA will be available on or about April 12, 2017. ADDRESSES: The NO 2 PA will be available primarily via the Internet at: https://www.epa.gov/​naaqs/​nitrogen-dioxide-no2-primary-standards-policy-assessments-current-review . FOR FURTHER INFORMATION CONTACT: Ms. Breanna Alman, Office of Air Quality Planning and Standards (Mail Code C504-06), U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone number: 919-541-2351; email: alman.breanna@epa.gov . SUPPLEMENTARY INFORMATION: Two sections of the Clean Air Act (CAA) govern the establishment and revisio…