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Federal Register / Vol. 86, No. 193 / Friday, October 8, 2021 / Notices
Docket Center, WJC West Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004. The Docket Centers hours of operations are 8:30
a.m.4:30 p.m., MondayFriday except Federal Holidays.
Instructions: All submissions received must include the Docket ID No. for this notice. Comments received may be posted without change to https
www.regulations.gov, including any personal information provided. For detailed instructions on sending comments, see the SUPPLEMENTARY
INFORMATION section of this document.
This document will be available on the EPAs website at https www.epa.gov/
naaqs/particulate-matter-pm-airquality-standards. The document will be accessible under Policy Assessments from the current review.
FOR FURTHER INFORMATION CONTACT: Dr.
Lars Perlmutt, Office of Air Quality Planning and Standards, Mail Code C53904, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone number:
9195413037, fax number: 919541
5315; or email: perlmutt.lars@epa.gov.
SUPPLEMENTARY INFORMATION:

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I. General Information Written Comments Submit your comments, identified by Docket ID No. EPAHQOAR2015
0072, at https www.regulations.gov our preferred method, or the other methods identified in the ADDRESSES
section. Once submitted, comments cannot be edited or removed from the docket.The EPA may publish any comment received to its public docket.
Do not submit to EPAs docket at https www.regulations.gov any information you consider to be Confidential Business Information CBI
or other information whose disclosure is restricted by statute. Multimedia submissions audio, video, etc. must be accompanied by a written comment.
The written comment is considered the official comment and should include discussion of all points you wish to make. The EPA will generally not consider comments or comment contents located outside of the primary submission i.e., on the web, cloud, or other file sharing system. For additional submission methods, the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit https www.epa.gov/dockets/
commenting-epa-dockets.
Due to public health concerns, the EPA Docket Center and Reading Room are open to the public by appointment
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only. Our Docket Center staff continues to provide remote customer service via email, phone, and webform. Hand deliveries or couriers will be received by scheduled appointment only. For further information and updates on EPA
Docket Center services, please visit us online at https www.epa.gov/dockets.
II. Information About the Document Two sections of the Clean Air Act CAA or the Act govern the establishment and revision of the NAAQS. Section 108 directs the Administrator to identify and list certain air pollutants and then issue air quality criteria for those pollutants.
The air quality criteria are to accurately reflect the latest scientific knowledge useful in indicating the kind and extent of all identifiable effects on public health or welfare which may be expected from the presence of such pollutant in the ambient air . . . CAA
section 108a2. Under section 109 of the Act, the EPA is then to establish primary health-based and secondary welfare-based NAAQS for each pollutant for which the EPA has issued air quality criteria. Section 109d1 of the Act requires periodic review and, if appropriate, revision of existing air quality criteria. Revised air quality criteria are to reflect advances in scientific knowledge on the effects of the pollutant on public health and welfare. Under the same provision, the EPA is also to periodically review and, if appropriate, revise the NAAQS, based on the revised air quality criteria.
The Act additionally requires appointment of an independent scientific review committee that is to periodically review the existing air quality criteria and NAAQS and to recommend any new standards and revisions of existing criteria and standards as may be appropriate CAA
section 109d2AB. Since the early 1980s, the requirement for an independent scientific review committee has been fulfilled by the Clean Air Scientific Advisory Committee CASAC.
In December 2020, the EPA
announced its final decision to retain the primary and secondary PM2.5 and PM10 standards, without revision 85 FR
82684, December 18, 2020.1 On June 10, 2021, the Agency announced its 1 Other welfare effects of PM, such as ecological effects, are being considered in the separate, ongoing review of the secondary NAAQS for oxides of nitrogen and oxides of sulfur. Accordingly, the public welfare protection provided by the secondary PM standards against ecological effects such as those related to deposition of nitrogenand sulfur-containing compounds in vulnerable ecosystems is being considered in that separate review.

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decision to reconsider the 2020 p.m.
NAAQS final action.2 In its announcement of the reconsideration of the PM NAAQS, the Agency explained that, in support of the reconsideration, it would develop an ISA Supplement and an updated PA. A draft of the ISA
Supplement was released in September 2021, for public comment and review by the CASAC. The PA, when final, serves to bridge the gap between the scientific and technical information in the 2019 ISA and ISA Supplement and any air quality, exposure and risk analyses available in the reconsideration, and the judgments required of the Administrator in determining whether to retain or revise the existing PM NAAQS. The draft PA
builds upon the information presented in the 2019 ISA, the ISA Supplement, and the 2020 PA. The draft PA
document will be available on or about October 8, 2021, on the EPAs website at https www.epa.gov/naaqs/
particulate-matter-pm-air-qualitystandards. The EPA is soliciting advice and recommendations from the CASAC
by means of a review of this draft document at an upcoming public meeting of the CASAC. Information about this public meeting, including the dates and location, will be published as a separate notice in the Federal Register. Following the CASAC
meeting, the EPA will consider comments received from the CASAC
and the public in preparing revisions to this document.
The draft document briefly described above does not represent and should not be construed to represent any final EPA
policy, viewpoint, or determination.
The EPA will consider any public comments submitted in response to this notice when revising the document.
Dated: October 5, 2021.
Panagiotis Tsirigotis, Director, Office of Air Quality Planning and Standards.
FR Doc. 202122067 Filed 10721; 8:45 am BILLING CODE 656050P

ENVIRONMENTAL PROTECTION
AGENCY
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Environmental Impact Statements;
Notice of Availability Responsible Agency: Office of Federal Activities, General Information 202
5645632 or https www.epa.gov/nepa.
2 The press release for this announcement is available at: https www.epa.gov/newsreleases/epareexamine-health-standards-harmful-soot-previousadministration-left-unchanged.

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