UNITED STATES ENVIRONMENTAL PROTECTION AGENCY RESEARCH TRIANGLE PARK, NC 27711

November 25, 2014



### MEMORANDUM OFFICE OF AIR QUALITY PLANNING AND STANDARDS



### SUBJECT:
FROM: Posting EPA-HQ-OAR-2008-0699 to Regulations.gov for Public Access

Susan L. Stone

# ~ Health and Environmental Impacts Division

Thru:**E~ika**N. Sasser 

# '1\ ;S, Director {/"' Health and Environmental Impacts Division

This memorandum authorizes the posting ofEPA-HQ-OAR-2008-0699 to Regulations.gov for public access. Background: This is a rulemaking docket for the review ofthe national ambient air quality standards for ozone, which will conclude in 2015. Thepublic may commenton all aspects oftherulemaking, which are discussed as follows. Based on its review ofthe air quality criteria for ozone (03) and relatedphotochemical oxidants and national ambient air quality standards (NAAQS) for 03, the EPA proposes to make revisions to the primary and secondaryNAAQS for 03 to provide requisite protection ofpublic health and welfare, respectively. The EPA is proposing to revise the primary standard to a level withinthe range of0.065 to 0.070 partsper million (ppm), and to revise the secondary standard to within the range of0.065 to 0.070 ppm, which air quality analyses indicate would provide air quality, in terms of3-year average W126 index values, at orbelowa range of 13-17 ppm-hours. The EPAproposes to make corresponding revisions in data handling conventions for 03 and conforming changes to the Air Quality Index (AQI); to revise regulations for the prevention ofsignificant deterioration (PSD) program to add a transition provision for certain applications; and to propose schedules and convey informationrelatedto implementing any revised standards. The EPA is proposing changes to the 03 monitoring seasons, the Federal Reference Method (FRM) for monitoring 03 in the ambient air, Federal Equivalent Method (FEM) procedures for testing, and the Photochemical Assessment Monitoring Stations (PAMS) network.
Along with proposing exceptional event schedules relatedto implementing any revised 03 standards, the EPAis proposing to apply this same schedule approach to other future

Internet Address (URL) • http://www.epa.gov Recycled/Recyclable • Printed**w~h** Vegetable Oil Based Inks on Recycled Paper (Minimum 25% Poslconsumer)revised NAAQS and to remove obsolete regulatory language for expired exceptional event deadlines. The EPA is proposingto make minor changes to the procedures and time periods for evaluatingpotential FRMs and equivalentmethods (including making the requirements for nitrogen dioxide consistent with the requirements for 03) and to remove
an obsolete requirement for the annual submission ofdocu!llentation by manufacturers of certain particulate matter monitors.

This document will be open for public commentfrom 11/26/2014 to 90 days after publication inthe Federal Register.
Submityour comments, identified by Docket ID No. EPA-HQ-OAR-2008-0699, by one ofthe following methods: www.regulations.gov: Follow the on-line instructions for submitting comments. Email: A-and-R-Docket@epa.gov
• Fax: (202) 566-9744 Mail: Attention: DocketID No. EPA-HQ-OAR-2008-0699, Environmental Protection Agency, EPA Docket Center (EPA/DC), Mailcode 28221T, 1200 PennsylvaniaAve, NW, Washington, DC 20460.
• Hand Delivery: EPA Docket Center, Room 3334, EPA WJC West Building, 1301 Constitution Avenue, NW, Washington, DC 20004. Such deliveries are only accepted during the Docket's normal hours ofoperation, and special arrangements should be made for deliveries ofboxed information.

EPA'spolicy is that all comments received will be included inthe public docket without change and may be made available online at http://www.regulations.gov, including any personal information provided, unless the comment includes information claimedto be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you considerto be CBI or otherwise protected through http://www.regulations.gov or e-mail. The http://www.regulations.gov Web site is an "anonymous access" system, which means EPA will not know your identity orcontact information unless youprovide it in the body ofyour comment. Ifyou send an e-mail comment directly to EPA without going through http://www.regulations.gov, your e-mail address will be automatically captured and included as part ofthe comment that is placed in the public docket and made available on the Internet. Ifyou submit an electronic comment, EPA recommends that you include yourname and other contact information in the body ofyour comment and with any disk
or CD-ROMyou submit. IfEPA cannotread your comment due to technical difficulties and cannot contact you for clarification, EPA may notbe able to consider your comment. Electronic files should avoid the use ofspecial characters, avoid any form ofencryption, and be free ofany defects orviruses. For additional information aboutEPA'spublic docket, visit the EPA Docket Centerhomepage at http://www.epa.gov/epahome/dockets.htm.Should you have any questions regarding this memorandum, please contact Susan Stone at (919) 541-1146, orvia email at stone.susan@epa.gov.