Document ID: EPA-R04-OAR-2019-0447-0012
Agency: epa
Document Type: Proposed Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: Mississippi; Best Available Retrofit Technology State Implementation Plan and Regional Haze Progress Report
Posted Date: 2020-09-18T04:00Z

[Federal Register Volume 85, Number 182 (Friday, September 18, 2020)]
[Proposed Rules]
[Pages 58319-58320]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-20555]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R04-OAR-2019-0447; FRL-10014-51-Region 4 ]

Air Plan Approval; MS; BART SIP and Regional Haze Progress Report

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule; reopening of public comment period.

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SUMMARY: The Environmental Protection Agency (EPA) is reopening the 
comment period until October 5, 2020, for a notice of proposed 
rulemaking (NPRM) published in the Federal Register on August 4, 2020. 
In the August 4, 2020, NPRM, EPA proposed to approve, through parallel 
processing, a draft Mississippi State Implementation Plan (SIP) 
revision, submitted through a letter dated April 23, 2020, addressing 
best available retrofit technology (BART) determinations for 14 
electric generating units (``draft BART SIP''). EPA proposed to approve 
the draft BART SIP and find that it corrects the deficiencies that led 
to the limited approval and limited disapproval of the State's regional 
haze SIP; withdraw the limited disapproval of the regional haze SIP; 
and replace the prior limited approval with a full approval of the 
regional haze SIP as meeting all regional haze requirements of the 
Clean Air Act (CAA) for the first implementation period. In addition, 
EPA proposed to approve the State's first periodic report describing 
progress towards reasonable progress goals (RPGs) established for 
regional haze and the associated determination that the State's 
regional haze SIP is adequate to meet these RPGs for the first 
implementation period (``Progress Report''). The State submitted the 
Progress Report as a SIP revision by letter dated October 4, 2018. EPA 
is reopening the comment period based on Sierra Club's request for 
visibility modeling files and for a 30-day extension of the comment 
period.

DATES: The comment period for the NPRM published August 4, 2020 (85 FR 
47134), is reopened, and comments

[[Page 58320]]

must be received on or before October 5, 2020.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R04-
OAR-2019-0447, at http://www.regulations.gov. Follow the online 
instructions for submitting comments. Once submitted, comments cannot 
be edited or removed from Regulations.gov. EPA may publish any comment 
received to its public docket. Do not submit electronically 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. 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 http://www2.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Michele Notarianni, Air Regulatory 
Management Section, Air Planning and Implementation Branch, Air and 
Radiation Division, U.S. Environmental Protection Agency, Region 4, 61 
Forsyth Street SW, Atlanta, Georgia 30303-8960. Ms. Notarianni can be 
reached via telephone at (404) 562-9031 or electronic mail at 
notarianni.michele@epa.gov.

SUPPLEMENTARY INFORMATION: EPA published a proposed rulemaking on 
August 4, 2020 (85 FR 47134). EPA proposed to approve Mississippi's 
draft BART SIP and find that it corrects deficiencies that led to a 
limited approval and limited disapproval of the State's regional haze 
SIP; withdraw the limited disapproval of Mississippi's regional haze 
SIP; and fully approve Mississippi's regional haze SIP as meeting all 
regional haze requirements of the CAA for the first implementation 
period, replacing the prior limited approval. EPA also proposed to 
approve Mississippi's October 4, 2018, regional haze Progress Report as 
meeting the applicable regional haze requirements set forth in 40 CFR 
51.308(g) and to approve the State's negative declaration under Sec.  
51.308(h).
    EPA is reopening the comment period based on a request from Sierra 
Club for visibility modeling files related to the proposed rulemaking 
and for a 30-day extension of the comment period until October 5, 2020. 
A copy of Sierra Club's request is in the docket. After reviewing this 
request, EPA has decided to reopen the comment period until October 5, 
2020.

    Authority:  42 U.S.C. 7401 et seq.

    Dated: September 1, 2020.
Mary Walker,
Regional Administrator, Region 4.
[FR Doc. 2020-20555 Filed 9-17-20; 8:45 am]
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