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Federal Register / Vol. 86, No. 33 / Monday, February 22, 2021 / Proposed Rules

9.5 Documentation

9.5.5 Using a Single List Revise the text of 9.5.5 by deleting the last sentence.

Joshua J. Hofer, Attorney, Federal Compliance.
FR Doc. 202029031 Filed 21921; 8:45 am BILLING CODE P

ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 52
EPAR06OAR20200604; FRL10017
37-Region 6

Approval and Promulgation of Air Quality Implementation Plans;
Louisiana; Infrastructure State Implementation Plan Requirements for the National Ambient Air Quality Standards Environmental Protection Agency EPA.
ACTION: Proposed rule.
AGENCY:

Pursuant to the Federal Clean Air Act CAA or Act, the Environmental Protection Agency EPA
is proposing to approve the State Implementation Plan SIP submittal from Louisiana submitted on November 4, 2020 for the 2015 ozone O3, 2006
PM2.5, 2008 ozone, 2010 nitrogen dioxide, 2010 sulfur dioxide and the 2012 PM2.5 National Ambient Air Quality Standards NAAQS. This submittal addresses how the existing SIP contains adequate provisions prohibiting emissions which interfere with required measures in any other State to protect visibility with respect to the 2015 ozone NAAQS as well as the 2006 PM2.5, 2008 ozone, 2010 nitrogen dioxide, 2010 sulfur dioxide and the 2012 PM2.5 NAAQS.
DATES: Written comments must be received on or before March 24, 2021.
ADDRESSES: Submit your comments, identified by Docket No. EPAR06
OAR20200604, at https
www.regulations.gov or via email to huser.jennifer@epa.gov. Follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from Regulations.gov. The EPA may publish any comment received to its public docket. Do not submit electronically any information you consider to be Confidential Business Information CBI

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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, please contact Jennifer Huser, 214 6657347, huser.jennifer@epa.gov. For 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-epadockets.
Docket: The index to the docket for this action is available electronically at www.regulations.gov. While all documents in the docket are listed in the index, some information may not be publicly available due to docket file size restrictions or content e.g., CBI.
FOR FURTHER INFORMATION CONTACT:
Jennifer Huser, EPA Region 6 Office, Air and Radiation DivisionState Planning and Implementation Branch, 1201 Elm Street, Suite 500, Dallas, TX 75270, 2146657347, huser.jennifer@epa.gov.
Out of an abundance of caution for members of the public and our staff, the EPA Region 6 office will be closed to the public to reduce the risk of transmitting COVID19. We encourage the public to submit comments via https
www.regulations.gov, as there will be a delay in processing mail and no courier or hand deliveries will be accepted.
Please call or email the contact listed above if you need alternative access to material indexed but not provided in the docket.
SUPPLEMENTARY INFORMATION:
Throughout this document wherever we, us, or our is used, we mean the EPA.
I. Background Under section 109 of the CAA, EPA
establishes NAAQS to protect human health and public welfare. On October 26, 2015, the EPA revised the primary and secondary 8-hour ozone NAAQS
from 0.075 ppm to 0.070 ppm to provide increased protection of public health and public welfare.1 In 2006, the EPA
revised the PM2.5 NAAQS,2 in 2008, the ozone NAAQS,3 in 2010, the nitrogen dioxide NAAQS,4 in 2010, the sulfur 1 80

FR 65291 October 26, 2015.
FR 61144 October 17, 2006.
3 73 FR 16483 March 27, 2008.
4 75 FR 6474 February 9, 1010.
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dioxide NAAQS,5 and in 2012, the PM2.5 NAAQS.6 The primary standards are set to protect human health, while secondary standards are set to protect public welfare.
The CAA requires states to submit, within 3 years after promulgation of a new or revised NAAQS, SIPs that meet the applicable infrastructure elements of sections 110a1 and 2. This SIP
submission is commonly referred to as an infrastructure SIP or i-SIP.
Section 110a2Di includes four distinct components, commonly referred to as prongs, that must be addressed in these infrastructure SIP
submissions. These prongs require that states adopt measures that prohibit certain adverse air quality effects on neighboring states due to interstate transport of pollution. Prong 4 requires states to demonstrate that their SIP
contains adequate measures that prohibit emissions from any source within a state from interfering with the visibility protection measures of other states also referred to as visibility transport.
In EPAs 2013 guidance for states regarding i-SIPs,7 EPA discussed its interpretation of Prong 4 and its relationship to the Regional Haze program under CAA sections 169A and 169B. EPA suggested two options states may have to demonstrate that the requirements of Prong 4 are met. One way in which Prong 4 may be satisfied for any relevant NAAQS is through confirmation in its infrastructure SIP
submission that it has an approved regional haze SIP that fully meets the requirements of 40 CFR 51.308 or 51.309. Alternatively, states may submit a demonstration in its infrastructure SIP
submission that shows that emissions within its jurisdiction do not interfere with other states plans to protect visibility. The demonstration must show that the state has sufficient measures that have been approved into its SIP that prevent emissions within its jurisdiction from interfering with the visibility protection plans of other states.

5 75

FR 35520 June 22, 2010.
FR 3085 January 15, 2013.
7 Stephen D. Page, Director, Office of Air Quality Planning and Standards. Guidance on Infrastructure State Implementation Plan SIP
Elements under Clean Air Act Section 110a1 and 110a2. Memorandum to EPA Air Division Directors, Regions 1 through 10, September 13, 2013 hereinafter 2013 I-SIP Guidance.
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