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Federal Register / Vol. 86, No. 49 / Tuesday, March 16, 2021 / Proposed Rules
Designated representative means the Coast Guard commissioned, warrant, or petty officer operating the on scene Coast Guard vessel designated by or assisting the Captain of the Port Maryland-National Capital Region COTP in the enforcement of the security zone.
c Regulations. 1 Under the general security zone regulations in subpart D of this part, you may not enter the security zone described in paragraph a of this section unless authorized by the COTP
or the COTPs designated representative.
2 To seek permission to enter the security zone described in paragraph a of this section, contact the COTP or the COTPs representative by telephone at 4105762693 or on Marine Band Radio VHFFM channel 16 156.8 MHz. The Coast Guard vessel enforcing this section can be contacted on Marine Band Radio VHFFM channel 16 156.8
MHz. Those in the security zone must comply with all lawful orders or directions given to them by the COTP or the COTPs designated representative.
3 A person or vessel operating in the security zone described in paragraph a1 of this section must not enter waters within 1,000 yards of the on scene Coast Guard vessel or test equipment being used by Coast Guard personnel.
d Enforcement periods. This section will be enforced 9 a.m. to 10 p.m. on April 25, 2021, and those same hours on April 26, 2021, April 27, 2021, April 28, 2021, April 29, 2021, April 30, 2021, May 1, 2021, May 2, 2021, May 3, 2021, May 4, 2021, May 5, 2021, May 6, 2021, May 7, 2021 and May 8, 2021.
Dated: March 9, 2021.
Joseph B. Loring, Captain, U.S. Coast Guard, Captain of the Port Maryland-National Capital Region.
FR Doc. 202105391 Filed 31521; 8:45 am BILLING CODE 911004P

ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 49 and 52

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EPAR09OAR20210018; FRL10020
02Region 9

Rescission of the Source-Specific Federal Implementation Plan for Navajo Generating Station, Navajo Nation
Table of Contents
Environmental Protection Agency EPA.
ACTION: Proposed rule.
AGENCY:

The Environmental Protection Agency EPA is proposing to rescind
SUMMARY:

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the federal implementation plan FIP
that regulates emissions from the Navajo Generating Station NGS, a coal-fired power plant that was located on the reservation lands of the Navajo Nation near Page, Arizona. NGS permanently ceased operations on November 18, 2019, and the Clean Air Act CAA or Act operating permit for this facility has expired.
DATES: Any comments on this proposal must arrive by April 15, 2021.
ADDRESSES: Submit your comments, identified by Docket ID number EPA
R09OAR20210018, at http
www.regulations.gov. For comments submitted at Regulations.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
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, or if you need assistance in a language other than English or if you are a person with disabilities who needs a reasonable accommodation at no cost to you, please contact the person identified in the FOR
FURTHER INFORMATION CONTACT section.
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-epa-dockets.
FOR FURTHER INFORMATION CONTACT:
Anita Lee, EPA Region IX, 415 972
3958, lee.anita@epa.gov.
SUPPLEMENTARY INFORMATION:
Throughout this document, we, us, and our refer to the EPA.
I. Background A. Action B. Facility C. Attainment Status D. The EPAs Authority To Promulgate a FIP in Indian Country E. Historical Overview of NGS FIP Actions II. Basis for Proposed Action III. Solicitation of Comments IV. Statutory and Executive Order Reviews
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I. Background A. Action In this action, the EPA is proposing to rescind the FIP for NGS that we promulgated on October 3, 1991 1991
FIP, March 5, 2010 2010 FIP, and August 8, 2014 2014 FIP.1 The provisions of the 1991 action are codified in the Code of Federal Regulations CFR at 40 CFR 52.145d, the provisions of the 2010 action are codified at 40 CFR 49.5513a through i, and provisions of the 2014 action are codified at 40 CFR 49.5513j. We refer collectively to the provisions from the 1991, 2010, and 2014 actions as the FIP or the NGS FIP. The NGS FIP
includes federally enforceable emissions limitations that apply to the fossil fuelfired steam generating equipment, designated as Units 1, 2, and 3, equipment associated with the coal and ash handling, and the two auxiliary steam boilers at NGS. These emissions limitations apply to emissions of particulate matter PM, sulfur dioxide SO2, and oxides of nitrogen NOX, and opacity. The EPA is proposing to rescind the NGS FIP and remove the provisions of the FIP from 40 CFR
52.145d and 40 CFR 49.5513.
B. Facility NGS was a coal-fired power plant that ceased operation in 2019, located on the reservation lands of the Navajo Nation, just east of Page, Arizona, and approximately 135 miles north of Flagstaff. NGS was co-owned by several entities and operated by Salt River Project Agricultural Improvement and Power District SRP.2 The facility operated three units, each with a capacity of 750 megawatts MW net generation, with a total capacity of 2250
MW. Operations at the facility produced air pollutant emissions, including emissions of SO2, NOX, and PM.
Existing pollution control equipment at NGS included wet flue gas desulfurization units for SO2 and PM
removal, electrostatic precipitators for PM removal, and low-NOX burners with separated over-fire air to reduce NOX
formation during the combustion process. Had the facility not ceased operations, the owner or operator of NGS would have taken steps by December 31, 2019 to reduce emissions 1 56 FR 50172 October 3, 1991, 75 FR 10174
March 5, 2010, and 79 FR 46552 August 8, 2014.
2 The original participants in NGS were the United States Bureau of Reclamation, SRP, Arizona Public Service Company, Tucson Electric Company, NV Energy, and the Los Angeles Department of Water and Power LADWP. SRP, serves as the facility operator. Prior to the permanent closure of NGS, SRP acquired the LADWP participant share in NGS.

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