Review of the Ozone National Ambient Air Quality Standards

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 Part 50 [EPA-HQ-OAR-2018-0279; FRL-10012-49-OAR] RIN 2060-AU40 AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed action. SUMMARY: Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O 3 ), the EPA is proposing to retain the current standards, without revision. DATES: Comments must be received on or before October 1, 2020. Public hearings: The EPA will hold two virtual public hearings on Monday, August 31, 2020, and Tuesday, September 1, 2020. Please refer to the SUPPLEMENTARY INFORMATION section for additional information on the public hearings. ADDRESSES: You may submit comments, identified by Docket ID No. EPA-HQ-OAR-2018-0279, by any of the following methods: Federal eRulemaking Portal: https://www.regulations.gov (our preferred method). Follow the online instructions for submitting comments. Email: a-and-r-Docket@epa.gov . Include the Docket ID No. EPA-HQ-OAR-2018-0279 in the subject line of the message. Mail: U.S. Environmental Protection Agency, EPA Docket Center, Air and Radiation Docket, Mail Code 28221T, 1200 Pennsylvania Avenue NW, Washington, DC 20460. Hand Delivery or Courier (by scheduled appointment only): EPA Docket Center, WJC West Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004. The Docket Center's hours of operations are 8:30 a.m.-4:30 p.m., Monday-…