Proposed Rule2021-14179
Air Quality Designations; NC: Redesignation of the Brunswick County 2010 Sulfur Dioxide Unclassifiable Area
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Published
July 2, 2021
Issuing agencies
Environmental Protection Agency
Abstract
The Environmental Protection Agency (EPA) is proposing to approve a submission by the State of North Carolina, through the Department of Air Quality (DAQ), on April 23, 2021, to redesignate the Brunswick County, North Carolina, unclassifiable area (hereinafter referred to as the "Brunswick County Area" or "Area") to attainment/unclassifiable for the 2010 1-hour primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (hereinafter referred to as the "2010 SO<INF>2</INF> 1-hour NAAQS"). Because EPA now has sufficient information to determine that the Brunswick County Area is attaining the 2010 1-hour SO<INF>2</INF> national ambient air quality standards (NAAQS), the Agency is proposing to approve the State's redesignation request, thereby redesignating the Area from unclassifiable to attainment/unclassifiable for the 2010 1-hour SO<INF>2</INF> NAAQS.
Full Text
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<title>Federal Register, Volume 86 Issue 125 (Friday, July 2, 2021)</title>
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[Federal Register Volume 86, Number 125 (Friday, July 2, 2021)]
[Proposed Rules]
[Pages 35254-35257]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-14179]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 81
[EPA-R04-OAR-2021-0322; FRL-10025-78-Region 4]
Air Quality Designations; NC: Redesignation of the Brunswick
County 2010 Sulfur Dioxide Unclassifiable Area
AGENCY: Environmental Protection Agency (EPA).
ACTION: Proposed rule.
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SUMMARY: The Environmental Protection Agency (EPA) is proposing to
approve a submission by the State of North Carolina, through the
Department of Air Quality (DAQ), on April 23, 2021, to redesignate the
Brunswick County, North Carolina, unclassifiable area (hereinafter
referred to as the ``Brunswick County Area'' or ``Area'') to
attainment/unclassifiable for the 2010 1-hour primary sulfur dioxide
(SO<INF>2</INF>) national ambient air quality standard (hereinafter
referred to as the ``2010 SO<INF>2</INF> 1-hour NAAQS''). Because EPA
now has sufficient information to determine that the Brunswick County
Area is attaining the 2010 1-hour SO<INF>2</INF> national ambient air
quality standards (NAAQS), the Agency is proposing to approve the
State's redesignation request, thereby redesignating the Area from
unclassifiable to attainment/unclassifiable for the 2010 1-hour
SO<INF>2</INF> NAAQS.
DATES: Comments must be received on or before August 2, 2021.
ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R04-
OAR-2021-0322 at <a href="http://www.regulations.gov">http://www.regulations.gov</a>. Follow the online
instructions for submitting comments. Once submitted, comments cannot
be edited or removed from <a href="http://Regulations.gov">Regulations.gov</a>. 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 <a href="http://www2.epa.gov/dockets/commenting-epa-dockets">http://www2.epa.gov/dockets/commenting-epa-dockets</a>.
FOR FURTHER INFORMATION CONTACT: Evan Adams, 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. Mr. Adams can be reached by
telephone at (404) 562-9009 or via electronic mail at
<a href="/cdn-cgi/l/email-protection#badbdedbd7c994dfccdbd4fadfcadb94ddd5cc"><span class="__cf_email__" data-cfemail="88e9ece9e5fba6edfee9e6c8edf8e9a6efe7fe">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
I. Background
The Clean Air Act (CAA or Act) establishes a process for air
quality management through the establishment and implementation of the
NAAQS. On June 2, 2010, EPA revised the primary SO<INF>2</INF> NAAQS,
establishing a new 1-hour SO<INF>2</INF> standard of 75 parts per
billion (ppb). See 75 FR 35520 (June 22, 2010).\1\ After the
promulgation of a new or revised NAAQS, EPA is required to designate
all areas of the country pursuant to section 107(d)(1)-(2) of the CAA.
For the 2010 1-hour SO<INF>2</INF> NAAQS, designations were based on
EPA's application of the nationwide analytical approach to, and
technical assessment of, the weight of evidence for each area,
including but not limited to available air quality monitoring data and
air quality modeling results. In advance of designating the Brunswick
County Area, EPA issued updated designations guidance through a March
20, 2015, memorandum from Stephen D. Page, Director, U.S. EPA, Office
of Air Quality Planning and Standards, to Regional Air Division
Directors, U.S. EPA Regions 1-10, titled ``Updated Guidance for Area
Designations for the 2010 Primary Sulfur Dioxide National Ambient Air
Quality Standard.'' This document contains the factors that EPA
evaluated in determining the appropriate designations and associated
boundaries when designating the Brunswick County Area, including: (1)
Air quality characterization via ambient monitoring or dispersion
modeling results; (2) emissions-related data; (3) meteorology; (4)
geography and topography; and (5)
[[Page 35255]]
jurisdictional boundaries.<SUP>2 3</SUP> The guidance also referenced
EPA's non-binding Monitoring Technical Assistance Document (Monitoring
TAD) \4\ and Modeling Technical Assistance Document (Modeling TAD),\5\
which contain scientifically sound recommendations on how air agencies
should conduct such monitoring or modeling.
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\1\ On February 25, 2019 (effective April 17, 2019), EPA issued
a decision to retain the existing NAAQS for SO<INF>2</INF>. See 84
FR 9866 (March 18, 2019).
\2\ The 2015 memorandum is available at <a href="https://www.epa.gov/sites/production/files/2016-04/documents/20150320so2designations.pdf">https://www.epa.gov/sites/production/files/2016-04/documents/20150320so2designations.pdf</a>.
\3\ This designation guidance has since been supplemented by a
July 22, 2016, designation guidance memorandum from Stephen D. Page,
Director, U.S. EPA, Office of Air Quality Planning and Standards, to
Regional Air Division Directors, U.S. EPA Regions 1-10. The 2016
memorandum is available at <a href="https://www.epa.gov/sites/production/files/2016-07/documents/areadesign.pdf">https://www.epa.gov/sites/production/files/2016-07/documents/areadesign.pdf</a>.
\4\ The version of the EPA's ``SO<INF>2</INF> NAAQS Designations
Source-Oriented Monitoring Technical Assistance Document''
(Monitoring TAD) available at the time of the Round 2 designations
action was released in December 2013. The current version of the
Monitoring TAD was released in February 2016 and superseded the
version released in December 2013.
\5\ ``Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air
Quality Standards Designations Modeling Technical Assistance
Document,'' August 2016 draft, available at <a href="https://www.epa.gov/sites/production/files/2016-06/documents/so2modelingtad.pdf">https://www.epa.gov/sites/production/files/2016-06/documents/so2modelingtad.pdf</a>. EPA
released earlier drafts of this document in May 2013 and February
2016.
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EPA completed the first set of initial area designations for the
2010 1-hour SO<INF>2</INF> NAAQS in 2013 (Round 1). Pursuant to a March
2, 2015, consent decree and court-ordered schedule,\6\ EPA finalized a
second set of initial area designations for the 2010 1-hour
SO<INF>2</INF> NAAQS in 2016 (Round 2). The March 2, 2015, consent
decree identified the following emissions criteria such that EPA must
designate, in Round 2, an area surrounding any stationary source which
had: (a) Annual emissions in 2012 exceeding 16,000 tons of
SO<INF>2</INF>, or (b) both an annual average emissions rate of at
least 0.45 pounds of SO<INF>2</INF> per one million British thermal
units, according to EPA's Clean Air Markets Division Database, and
annual emissions of at least 2,600 tons of SO<INF>2</INF> in 2012.
North Carolina had one source, the Capital Power Incorporated (CPI)
Southport Cape Fear facility in Brunswick County, that met these Round
2 criteria.
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\6\ See Sierra Club et. al. v. McCarthy, Civil Action No. 3:13-
cv-3953-SI (N.D. Cal.) and 79 FR 31325 (June 2, 2014).
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EPA evaluated the Brunswick County Area, using the five factors
identified previously, during the Round 2 designations. This evaluation
is discussed further in Section III of this notice. The CPI Southport
facility, located on the coast of southeastern North Carolina in the
southeastern portion of Brunswick County, was an electric power
generation plant with two electric generating units (EGUs) that were
permitted to combust a variety of solid fuels, including coal, woody
biomass fuels, and tire derived fuel. CPI was included in the list of
facilities to be designated pursuant to the March 2, 2015, Consent
Decree.\7\
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\7\ CPI Southport was also subject to EPA's 2015 Data
Requirements Rule (DRR) for the 2010 SO<INF>2</INF> 1-hour NAAQS.
See <a href="https://www.epa.gov/sites/production/files/2016-06/documents/nc.pdf">https://www.epa.gov/sites/production/files/2016-06/documents/nc.pdf</a> for North Carolina's letter and DRR source list, dated
January 15, 2016. EPA separately promulgated the DRR which required
states to undertake air quality characterization for areas with
SO<INF>2</INF> sources meeting certain criteria. Specifically, the
DRR required state air agencies to provide additional monitoring or
modeling information to characterize air quality in areas associated
with sources meeting certain criteria or that have otherwise been
listed under the DRR by EPA or state air agencies, or to instead
impose federally enforceable emission limitations on those sources
restricting their annual SO<INF>2</INF> emissions to less than 2,000
tons per year, or provide documentation that the sources have been
shut down, by specified dates. The information generated by
implementation of the DRR informed EPA's designations.
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EPA's March 20, 2015, guidance specified the designation category
definitions to be used in the Round 2 designations. Specifically, EPA
defined a ``nonattainment'' area as an area that EPA has determined
violates the 2010 1-hour SO<INF>2</INF> NAAQS based on the most recent
three years of quality-assured, certified ambient air quality
monitoring data or an appropriate modeling analysis, or that EPA has
determined contributes to a violation in a nearby area; and defined an
``attainment'' area as an area that EPA has determined meets the 2010
1-hour SO<INF>2</INF> NAAQS and does not contribute to a violation of
the NAAQS in a nearby area based on either: (a) The most recent three
years of ambient air quality monitoring data from a monitoring network
in an area that is sufficient to be compared to the NAAQS per EPA
interpretations in the Monitoring TAD, or (b) an appropriate modeling
analysis.
As discussed further in Section III of this notice, EPA was unable
to determine whether the Brunswick County Area met the definition of a
nonattainment area or the definition of an attainment area based on the
available information at the time of the Round 2 designations. As a
result, EPA designated the Brunswick County Area as unclassifiable in
the Round 2 designations published on July 12, 2016.\8\ The Area
includes all six townships (Lockwood Folly Township, Northwest
Township, Shallotte Township, Smithville Township, Town Creek Township,
Waccamaw Township) within the jurisdictional boundary of Brunswick
County. Detailed rationale, analyses, and other information supporting
EPA's original Round 2 designation for this Area can be found in the
Round 2 designation's technical support document (TSD) for North
Carolina. All supporting materials for the original 2010 1-hour
SO<INF>2</INF> NAAQS designation for the Brunswick County Area,
including the TSD, can be found on EPA's SO<INF>2</INF> designations
website.\9\
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\8\ See 81 FR 45039 (July 12, 2016, effective September 12,
2016) codified at 40 CFR 81.334.
\9\ EPA's SO<INF>2</INF> designations website can be found at
<a href="https://www.epa.gov/sulfur-dioxide-designations/epa-completes-second-round-sulfur-dioxide-designations">https://www.epa.gov/sulfur-dioxide-designations/epa-completes-second-round-sulfur-dioxide-designations</a>.
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After reviewing North Carolina's redesignation request under CAA
section 107(d)(3)(D) and all available information, EPA is proposing to
redesignate the Brunswick County Area from unclassifiable to
attainment/unclassifiable for the 2010 1-hour SO<INF>2</INF> standard
based on a valid ambient SO<INF>2</INF> design value that adequately
characterizes the SO<INF>2</INF> air quality in the Brunswick County
Area. See Sections II and III below for more information on the
criteria to redesignate unclassifiable SO<INF>2</INF> areas and the
rationale for this proposed action.
II. What are the criteria for redesignating an area from unclassifiable
to attainment/unclassifiable?
Section 107(d)(3)(A) of the CAA provides that the Administrator may
notify the Governor of any state that the designation of an area should
be revised ``on the basis of air quality data, planning and control
considerations, or any other air quality-related considerations the
Administrator deems appropriate.'' \10\ The Act further provides in
section 107(d)(3)(D) that even if the Administrator has not notified a
state Governor that a designation should be revised, the Governor of
any state may, on the Governor's own motion, submit a request to revise
the designation of any area, and the Administrator must approve or deny
the request. In keeping with CAA section 107(d)(3)(A), areas that are
redesignated to attainment/unclassifiable \11\ must meet the
[[Page 35256]]
requirements for attainment areas and, thus, must meet the relevant
NAAQS. In addition, the area must not contribute to ambient air quality
in a nearby area that does not meet the NAAQS. See the definitions for
nonattainment area, attainment area, and unclassifiable area in CAA
section 107(d)(1)(A)(i)-(iii).
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\10\ While CAA section 107(d)(3)(E) also lists specific
requirements for redesignations, those requirements only apply to
redesignations of nonattainment areas to attainment and, therefore,
are not applicable in the context of a redesignation of an area from
unclassifiable to attainment/unclassifiable.
\11\ Historically, EPA has designated most areas that do not
meet the definition of nonattainment as ``unclassifiable/
attainment.'' EPA has reversed the order of the label to be
``attainment/unclassifiable'' to better convey the definition of the
designation category and so that the category is more easily
distinguished from the separate unclassifiable category. See 83 FR
1098 (January 9, 2018) and 83 FR 25776 (June 4, 2018). EPA reserves
the ``attainment'' category for when EPA redesignates a
nonattainment area that has attained the relevant NAAQS and has an
approved maintenance plan.
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In its designations under the 2010 1-hour SO<INF>2</INF> NAAQS, EPA
has generally defined an attainment/unclassifiable area as an area
that, based on available information including (but not limited to)
appropriate monitoring data and/or modeling analyses, EPA has
determined meets the NAAQS and determined that the available
information indicates that the area does not likely contribute to
ambient air quality in a nearby area that does not meet the NAAQS. EPA
is proposing to find that the Brunswick County Area now meets the
definition of attainment/unclassifiable based upon a 3-year certified
and complete design value of air quality monitoring data that
demonstrates attainment, i.e., no violations of the 2010 1-hour
SO<INF>2</INF> NAAQS, and the fact that sources in Brunswick County are
not contributing to a nearby area that is violating the NAAQS. EPA
preliminarily finds this information sufficient for the purposes of
redesignating an area from unclassifiable to attainment/unclassifiable.
Such redesignations are functionally similar to initial designations
and are not subject to CAA section 107(d)(3)(E), which, amongst other
things, requires attainment to be due to permanent and enforceable
measures and which requires a demonstration that the area will maintain
the NAAQS for 10 years. For the Brunswick County Area, DEQ submitted a
request to redesignate the area from unclassifiable to attainment/
unclassifiable on April 23, 2021.\12\
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\12\ This redesignation request is included in the docket for
this proposed action.
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III. What is EPA's rationale for proposing to redesignate the area?
The Brunswick County Area includes the CPI Southport facility,
which met the Round 2 criteria as discussed in Section I of this
document, and thus, EPA was required to designate the Area in 2016,
under the March 2, 2015, court-ordered schedule. After review of all
available information at that time, including modeling provided by the
State, EPA was unable to determine the Area's attainment status, and
therefore, designated Brunswick County in its entirety as
unclassifiable in Round 2 of designations for the 2010 1-hour
SO<INF>2</INF> primary NAAQS on July 12, 2016. EPA's rationale for the
unclassifiable designation is fully explained in the final Round 2
designations TSD.\13\ For Brunswick County, DAQ selected the monitoring
pathway for purposes of air quality characterization pursuant to EPA's
SO<INF>2</INF> Data Requirements Rule (DRR) (80 FR 51052, August 21,
2015).\14\ Pursuant to requirements under the DRR to characterize the
air quality in the area around CPI Southport, North Carolina installed
an SO<INF>2</INF> monitor in the area of maximum concentration for the
CPI Southport facility (in accordance with EPA's Monitoring TAD and 40
CFR parts 50 and 58) and began collecting data on January 1, 2017.\15\
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\13\ The final Round 2 designations TSD can be found at <a href="https://www.epa.gov/sites/production/files/2016-07/documents/r4_nc_final_designation_tsd_06302016.pdf">https://www.epa.gov/sites/production/files/2016-07/documents/r4_nc_final_designation_tsd_06302016.pdf</a>.
\14\ Data Requirements Rule for the 2010 1-Hour Sulfur Dioxide
(SO<INF>2</INF>) Primary National Ambient Air Quality Standard
(NAAQS), Final Rule, 80 FR 51052, August 21, 2015 (<a href="https://www.govinfo.gov/content/pkg/FR-2015-08-21/pdf/2015-20367.pdf">https://www.govinfo.gov/content/pkg/FR-2015-08-21/pdf/2015-20367.pdf</a>). In
accordance with the DRR, 40 CFR part 51, subpart BB, through a
letter dated June 30, 2016, North Carolina notified EPA that the
State chose to characterize peak 1-hour SO<INF>2</INF>
concentrations for CPI through air quality monitoring. See <a href="https://www.epa.gov/sites/production/files/2016-07/documents/north_carolina_source_characterization.pdf">https://www.epa.gov/sites/production/files/2016-07/documents/north_carolina_source_characterization.pdf</a>.
\15\ The monitor is located at the site of maximum concentration
based on modeling following the procedures in EPA SO<INF>2</INF>
Monitoring TADs. More details on the analyses used to support the
monitor placement are contained in the state's 2016 annual
monitoring annual network plan located in the docket for this
proposed action.
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On April 23, 2021, North Carolina submitted a letter to EPA
requesting that the entirety of Brunswick County be redesignated to
attainment/unclassifiable based on the newly available monitoring
information, which demonstrates attainment of the 2010 1-hour
SO<INF>2</INF> NAAQS. To evaluate North Carolina's redesignation
request, EPA considered the design value for the air quality monitor in
Brunswick County by assessing the most recent three consecutive years
(i.e., 2018-2020) of quality-assured, certified ambient air quality
data in the EPA Air Quality System (AQS) using data from a monitor that
was sited and operated in accordance with 40 CFR parts 50 and 58.
Procedures for using monitored air quality data to determine whether a
violation has occurred are provided in 40 CFR part 50 Appendix T, as
revised in the 2010 1-hour SO<INF>2</INF> NAAQS rulemaking. As noted
previously, the 2010 1-hour SO<INF>2</INF> NAAQS is met when the design
value is 75 ppb or less. Table 1, below, contains the most recent three
years of ambient SO<INF>2</INF> monitoring data available and shows
that the Area is attaining the 2010 1-hour SO<INF>2</INF> NAAQS with a
design value of 54 ppb for the period 2018-2020.\16\
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\16\ North Carolina early certified the Southport monitor 2018-
2020 air quality data in AQS on January 13, 2021. See Table 2 in
North Carolina's April 23, 2021, redesignation request.
Table 1--2010 SO2 NAAQS Monitoring Data for the Brunswick County Area
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2018 99th 2019 99th 2020 99th 2018-2020
AQS ID Monitor site percentile percentile percentile design value
(ppb) (ppb) (ppb) (ppb)
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370190005....................... Southport.......... 55 * 60 46 54
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* Brunswick County SO2 monitoring measurements for the third quarter (July, August, and September) of 2018 did
not meet the data completeness requirement of 75% data capture. However, a valid design value for 2018 to 2020
was obtained using the data substitution procedures in 40 CFR part 50, Appendix T, Section 3(c)(ii)(B).
Additionally, on March 31, 2020, the CPI Southport facility ceased
operation, and the DAQ rescinded the facility's operating permit
effective April 1, 2021.\17\ After reviewing North Carolina's request
under CAA section 107(d)(3)(D) and all available information, EPA is
proposing to find that the three years of monitored ambient
SO<INF>2</INF> data from 2018-2020 adequately characterize the
SO<INF>2</INF> air quality in Brunswick County and demonstrate
attainment of the 2010 1-hour SO<INF>2</INF> NAAQS in the Area.
Additionally, there is no evidence of monitored or modeled violations
in the
[[Page 35257]]
surrounding counties such that the source is contributing to any nearby
area that does not meet the NAAQS. EPA is therefore proposing to
approve North Carolina's redesignation request and redesignate the
Brunswick County Area from unclassifiable to attainment/unclassifiable
based on the currently available information that demonstrates
attainment of the 2010 1-hour SO<INF>2</INF> NAAQS.
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\17\ The DAQ's April 1, 2021 letter rescinding Air Quality
Permit No. 05884T21 and the January 20, 2021, certified letter from
Mr. Frank Hayward, General Manager, CPI USA North Carolina, LLC--
Southport Plant to Mr. Brad Newland, P.E., Regional Air Quality
Supervisor, Wilmington Regional Office, NC Division of Air Quality,
requesting permit recission are located in the docket for this
proposed action.
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IV. Proposed Action
EPA is proposing to approve North Carolina's April 23, 2021,
request to redesignate the Brunswick County Area from unclassifiable to
attainment/unclassifiable for the 2010 1-hour SO<INF>2</INF> NAAQS. As
discussed in prior sections, this proposed action is based on the
currently available monitoring data for the Brunswick County Area that
demonstrate attainment of the 2010 1-hour SO<INF>2</INF> primary NAAQS.
If finalized, approval of the redesignation request would change the
legal designation for this Area, found at 40 CFR part 81, from
unclassifiable to attainment/unclassifiable for the 2010 1-hour
SO<INF>2</INF> primary NAAQS.
V. Statutory and Executive Order Reviews
Under the CAA, redesignation of an area to attainment/
unclassifiable is an action that affects the status of a geographical
area and does not impose any additional regulatory requirements on
sources beyond those imposed by state law. A redesignation to
attainment/unclassifiable does not create any new requirements.
Accordingly, this proposed action merely proposes to redesignate an
area to attainment/unclassifiable and does not impose additional
requirements. For that reason, this proposed action:
<bullet> Is not a significant regulatory action subject to review
by the Office of Management and Budget under Executive Orders 12866 (58
FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21, 2011);
<bullet> Does not impose an information collection burden under the
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
<bullet> Is certified as not having a significant economic impact
on a substantial number of small entities under the Regulatory
Flexibility Act (5 U.S.C. 601 et seq.);
<bullet> Does not contain any unfunded mandate or significantly or
uniquely affect small governments, as described in the Unfunded
Mandates Reform Act of 1995 (Pub. L. 104-4);
<bullet> Does not have Federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999);
<bullet> Is not an economically significant regulatory action based
on health or safety risks subject to Executive Order 13045 (62 FR
19885, April 23, 1997);
<bullet> Is not a significant regulatory action subject to
Executive Order 13211 (66 FR 28355, May 22, 2001);
<bullet> Is not subject to requirements of Section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) because application of those requirements would be inconsistent
with the CAA; and
<bullet> Will not have disproportionate human health or
environmental effects under Executive Order 12898 (59 FR 7629, February
16, 1994).
This proposed action does not apply on any Indian reservation land
or in any other area where EPA or an Indian tribe has demonstrated that
a tribe has jurisdiction. In those areas of Indian country, this
proposed action does not have tribal implications as specified by
Executive Order 13175 (65 FR 67249, November 9, 2000), nor will it
impose substantial direct costs on tribal governments or preempt tribal
law.
List of Subjects in 40 CFR Part 81
Environmental protection, Air pollution control.
Authority: 42 U.S.C. 7401 et seq.
Dated: June 28, 2021.
John Blevins,
Acting Regional Administrator, Region 4.
[FR Doc. 2021-14179 Filed 7-1-21; 8:45 am]
BILLING CODE 6560-50-P
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