Document ID: EPA-R05-OAR-2020-0731-0012
Agency: epa
Document Type: Rule
Title: Direct Final approval of the Michigan 2015 Ozone Emission Inventories and Emission Statement
Posted Date: 2023-01-18T05:00Z

[Federal Register Volume 88, Number 11 (Wednesday, January 18, 2023)]
[Rules and Regulations]
[Pages 2834-2839]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-00369]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R05-OAR-2020-0730; EPA-R05-OAR-2020-0731; FRL-9746-02-R5]

Air Plan Approval; Michigan; Base Year Emissions Inventory and 
Emissions Statement Rule for the 2015 Ozone Standard

AGENCY: Environmental Protection Agency (EPA).

ACTION: Direct final rule.

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[[Page 2835]]

SUMMARY: The Environmental Protection Agency (EPA) is approving, under 
the Clean Air Act (CAA), a request submitted by the Michigan Department 
of Environment, Great Lakes, and Energy (EGLE) on December 18, 2020, to 
revise the Michigan State Implementation Plan (SIP). EGLE's submittal 
addresses the emissions inventory and statement requirements for the 
Allegan County, Berrien County, Detroit (Livingston, Macomb, Monroe, 
Oakland, St. Clair, Washtenaw, and Wayne Counties) and Muskegon County 
nonattainment areas under the 2015 ozone National Ambient Air Quality 
Standard (NAAQS or standard). The CAA requires states to develop and 
submit, as SIP revisions, emission inventories for all ozone 
nonattainment areas. In this action, EPA is approving EGLE's emissions 
inventories for the Allegan County, Berrien County, and Muskegon County 
nonattainment areas under the 2015 ozone NAAQS and the removal of the 
repealed Act 348, Section 14a. EPA approved the portions of EGLE's 
December 18, 2020, submittal pertaining to the certification of EGLE's 
stationary annual emissions statement regulation and emissions 
inventories for the Detroit nonattainment area under the 2015 ozone 
NAAQS in a separate action on July 6, 2022.

DATES: This direct final rule is effective March 20, 2023, unless EPA 
receives adverse comments by February 17, 2023. If adverse comments are 
received, EPA will publish a timely withdrawal of the direct final rule 
in the Federal Register informing the public that the rule will not 
take effect.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R05-
OAR-2020-0730 (regarding emissions statement) or EPA-R05-OAR-2020-0731 
(regarding emissions inventory) at https://www.regulations.gov or via 
email to [email protected]. For comments submitted at 
Regulations.gov, follow the online instructions for submitting 
comments. Once submitted, comments cannot be edited or removed from 
Regulations.gov. For either manner of submission, 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, 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://www2.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Emily Crispell, Environmental 
Scientist, Control Strategies Section, Air Programs Branch (AR-18J), 
Environmental Protection Agency, Region 5, 77 West Jackson Boulevard, 
Chicago, Illinois 60604, (312) 353-8512, [email protected]. The 
EPA Region 5 office is open from 8:30 a.m. to 4:30 p.m., Monday through 
Friday, excluding Federal holidays and facility closures due to COVID-
19.

SUPPLEMENTARY INFORMATION: Throughout this document whenever ``we,'' 
``us,'' or ``our'' is used, we mean EPA.

I. The 2015 Ozone NAAQS Emissions Inventory and Emissions Statement 
Rule Requirements

    On December 28, 2015, EPA promulgated a revised 8-hour ozone NAAQS 
of 0.070 parts per million (ppm) (October 26, 2015, 80 FR 65292). The 
Allegan County (partial county), Berrien County, and Muskegon County 
(partial county) nonattainment areas were designated as marginal 
nonattainment areas for the 2015 ozone NAAQS (June 4, 2018, 83 FR 
25776).

A. Emissions Inventories

    CAA sections 172(c)(3) and 182(a)(1), 42 U.S.C. 7502(c)(3) and 
7511a(a)(1), require states to develop and submit, as SIP revisions, 
emission inventories for all areas designated as nonattainment for any 
NAAQS, including the ozone NAAQS. An emissions inventory for ozone is 
an estimation of actual emissions of air pollutants that contribute to 
the formation of ozone in an area. Ozone is a gas that is formed by the 
reaction of volatile organic compounds (VOC) and oxides of nitrogen 
(NOX) in the atmosphere in the presence of sunlight (VOC and 
NOX are referred to as ozone precursors). Therefore, an 
emissions inventory for ozone focuses on the emissions of VOC and 
NOX. VOC is emitted by many types of pollution sources 
including power plants, industrial sources, on-road and off-road mobile 
sources, smaller stationary sources (collectively referred to as area 
sources), and biogenic sources. NOX is primarily emitted by 
combustion sources, both stationary and mobile.
    Emissions inventories provide emissions data for a variety of air 
quality planning tasks including:

--establishing baseline emissions levels (anthropogenic [manmade] 
emissions associated with ozone standard violations),
--calculating emission reduction targets needed to attain the NAAQS and 
to achieve reasonable further progress (RFP) toward attainment of the 
ozone standard,
--determining emissions inputs for ozone air quality modeling analyses, 
and
--tracking emissions over time to determine progress toward achieving 
air quality and emissions reduction goals.

    As stated above, the CAA requires the states to submit emission 
inventories for areas designated as nonattainment for ozone. For the 
2015 ozone NAAQS, EPA specifies that states submit ozone season day 
emissions estimates for an inventory calendar year to be consistent 
with the baseline year for RFP plan as required by 40 CFR 51.1310(b). 
For the RFP baseline year for the 2015 ozone NAAQS under 40 CFR 
51.1310(b), states may use a calendar year for the most recently 
available complete triennial (3-year cycle) emissions inventory (40 CFR 
51, subpart A) preceding the year of the area's effective date of 
designation as a nonattainment area (December 6, 2018, 83 FR 62998).\1\ 
States are required to submit estimates of VOC and NOX 
emissions for four general classes of anthropogenic sources: stationary 
point sources; area sources; on-road mobile sources; and off-road 
mobile sources.
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    \1\ The RFP requirements specified in CAA section 182(b)(1) 
shall apply to all area's designated nonattainment for ozone 
classified Moderate or higher.
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B. Emissions Statement Rules

    Section 182(a)(3)(B) of the CAA requires states with ozone 
nonattainment areas to submit revisions to their SIP to require the 
owner or operator of each major stationary source of NOX or 
VOC to provide the state with an annual statement documenting the 
actual emissions of NOX and VOC from their source. Under 
section 182(a)(3)(B)(ii), a state may waive the emissions statement 
requirement for any class or category of stationary sources which emits 
less than 25 tons per year of VOC or NOX if the state, in 
its base year emissions inventory, provides an inventory of emissions 
from such class or category of sources. States and EPA

[[Page 2836]]

have generally interpreted this waiver provision to apply to sources 
(without specification of a specific source class or source category) 
emitting less than 25 tons per year of VOC or NOX.
    Many states have adopted these emissions statement rules for a 
prior ozone NAAQS that covers all the state's nonattainment areas and 
relevant classes and categories of sources. For these states, EPA is 
accepting certifications that their previously adopted emissions 
statement rules remain in place and are adequate to meet the emissions 
statement rule requirement under the 2015 ozone standard (December 6, 
2018, 83 FR 62998).

II. Michigan's Emissions Inventory

    On December 18, 2020, EGLE submitted a request to revise the 
Michigan SIP to address the emissions inventory requirement of CAA 
section 182(a)(1). EGLE provided documentation of a 2017 NOX 
and VOC base year emissions inventory to meet requirements for the 
Allegan County, Berrien County, Detroit and Muskegon County 
nonattainment areas. EPA approved emissions inventories for the Detroit 
nonattainment area under the 2015 ozone NAAQS in a separate action on 
July 6, 2022 (87 FR 40097). EGLE selected 2017 as the base year because 
this was the most recent comprehensive, accurate, and quality assured 
(QA) triennial emissions inventory in the National Emissions Inventory 
(NEI) database, available at the time the state began preparing the 
emissions inventory submittal for the Allegan County, Berrien County, 
and Muskegon County areas and is consistent with baseline year for the 
RFP plan as required by 40 CFR 51.1310(b). The baseline year for RFP 
would be the calendar year for the most recently available triennial 
emissions inventory at the time ROP/RFP plans are developed (e.g., 2017 
for initial designations effective in 2018) (83 FR 62998). At the time 
that EGLE prepared its inventory of 2017 emissions to address the 
requirements of section 182(a)(1), several improvements in data sources 
were not yet available. Specifically, EGLE relied upon a version of the 
2017 NEI that did not include a revised point source inventory to 
correct airport emissions. Additionally, EGLE relied upon the 2016v1 
modeling platform (which did not yet include improvements from the 
2016v2 modeling platform) including updated information from the 2017 
NEI, MOVES3, and revised inventory methodologies. EPA is not evaluating 
Michigan's 2017 emissions inventory against platforms or data sources 
that were not available at the time of submission. Table 1 shows the 
Allegan County, Berrien County, and Muskegon County areas' 2017 
NOX emissions in tons per ozone season day.\2\ Table 2 shows 
the Allegan County, Berrien County, and Muskegon County areas' 2017 VOC 
emissions in tons per ozone season day.
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    \2\ The ozone season is the portion of the year in which high 
ozone concentrations may be expected in a given area.

                                                      Table 1--2017 Ozone Season Day NOX Emissions
                                                                       [Tons/day]
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                                                                                                                                              Total NOX
                         County/NAA                              Event      Biogenics       Area       Non-road     On-road       Point
--------------------------------------------------------------------------------------------------------------------------------------------------------
Allegan.....................................................         0.02         0.96         0.73         0.83         2.83         1.76          7.13
Berrien.....................................................         0.02         1.42         1.11         1.35         6.70         2.09         12.69
Muskegon....................................................         0.02         0.49         1.01         0.79         2.91         0.19          5.41
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                                      Table 2--2017 Ozone Season Day VOC Emissions
                                                                       [Tons/day]
--------------------------------------------------------------------------------------------------------------------------------------------------------
                         County/NAA                              Event      Biogenics       Area       Non-road     On-road       Point       Total VOC
--------------------------------------------------------------------------------------------------------------------------------------------------------
Allegan.....................................................         0.33        18.12         3.72         0.90         1.50         0.60         25.17
Berrien.....................................................         0.41        19.69         6.47         2.03         3.49         0.95         33.04
Muskegon....................................................         0.30        19.97         3.79         1.40         2.04         0.49         27.99
--------------------------------------------------------------------------------------------------------------------------------------------------------

    EGLE estimated NOX and VOC emissions for all source 
categories in the Allegan County, Berrien County, and Muskegon County 
ozone nonattainment areas. Emissions for these counties were totaled by 
source category for each ozone nonattainment area.
    To develop emissions inventories for the year 2017, Michigan began 
with annual emissions data contained in the 2017 NEI for the point, 
nonpoint, on-road, nonroad, biogenic, and event categories. Ozone 
season day emissions were calculated by determining the representative 
typical ozone season month during the May 1-September 30 ozone season 
period by defining all days with ambient air monitor values at or above 
70 parts per billion as ``typical ozone season'' days. EGLE then 
assessed which months contained the most typical ozone season days or 
the days with the highest measured values or greatest impact on the 
design values. Using this methodology, EGLE selected July as the 
representative typical ozone season month. To convert annual emissions 
data to ozone season day values, EGLE extracted data from EPA's 2016v1 
modeling platform and calculated a conversion factor for the point, 
nonpoint, on-road, nonroad, and biogenic data categories. EGLE 
determined the event category emissions were too low and too variable 
from year to year to benefit from applying a conversion factor. For 
partial county nonattainment areas, a scaling factor was also applied 
before obtaining the emissions. EGLE also analyzed the impact of 
weekend day emissions on monitored design values. EGLE determined that 
weekend day emissions have a large impact on individual monitor design 
values and included weekend days in the calculation of typical ozone 
season day emission values.
    For point sources, EGLE calculates and stores emissions data 
annually in the state's air emissions inventory database. Under the 
authority of Michigan Air Pollution Control Rule 2 (R 336.202) and AQD-
013, EGLE requires any facility in the state that emits a pollutant 
above the thresholds

[[Page 2837]]

specified to submit emissions inventory statements annually. These 
reports contain detailed source type-specific or annual source unit-
specific and seasonal actual emissions for all source units in a 
facility. QA is performed when the data are submitted to the Emissions 
Inventory System Gateway.
    For area source (sometimes referred to as non-point source) 
emissions, EGLE relied on a variety of state-specific data to estimate 
emissions based on EPA's procedures and guidance for the 2017 base 
emissions inventory. Area sources are spread over wide areas with no 
distinct discharge points or are comprised of a large number of small 
point sources that are difficult to describe separately and whose 
emissions are not well characterized (e.g., heating furnaces in 
individual homes, architectural surface coating, automobile refueling, 
dry cleaning, etc.). To develop an accurate and complete area source 
inventory, EGLE used annual emissions from the 2017 NEI and monthly 
emissions profiles from 2016v1 platform data. EGLE calculated 2017 
emissions estimations by applying conversion factors to the July 
monthly emission profile to obtain daily emissions. A scaling factor 
was applied to the area source emissions for the partial county 2015 
ozone NAAQS nonattainment areas.
    On-road and non-road mobile source emissions were developed by EGLE 
using annual emissions from the 2017 NEI and monthly emissions profiles 
from 2016v1 platform data. On-road mobile sources include emissions 
from motorized vehicles that are normally operated on public roadways. 
This includes passenger cars, motorcycles, minivans, sport-utility 
vehicles, light-duty trucks, heavy duty trucks, and buses. Non-road 
mobile sources include emissions from locomotives, aircraft, marine, 
off-road vehicles and non-road equipment such as lawn and garden 
equipment.
    For biogenics, which comprise of emissions that come from natural 
sources, EGLE utilized the annual emissions from the 2017 NEI and 
monthly emissions profiles from 2016v1 platform data. EGLE applied a 
conversion factor 2016v1 platform July emissions to obtain ozone season 
day emissions for the 2017 NEI annual values. For the event category, 
which is primarily comprised of wildfire emissions, EGLE relied on the 
2017 NEI emissions in entirety.

III. Michigan's Emissions Statement Rule

    Section 182(a)(3)(B) of the CAA requires states to include 
regulations in the SIP to require sources (source facilities) to submit 
annual statements characterizing sources of NOX and VOC 
emissions within the source facilities and to report actual 
NOX and VOC emissions for these sources. EPA approved the 
majority of EGLE's December 18, 2020, submittal pertaining to the 
certification of EGLE's stationary annual emissions statement 
regulation under the 2015 ozone NAAQS in a separate EPA action on July 
6, 2022 (87 FR 40097). The remaining request included in EGLE's 
December 18, 2020, submittal, which was not addressed in EPA's separate 
action, was the removal of Act 348, Section 14a from the SIP. Act 348, 
Section 14a was repealed in 1995 and required annual fee payment by 
certain sources to EGLE as part of the elements for the Michigan Title 
V Renewable Operating Permit Program.

IV. EPA's Evaluation

A. Emissions Inventory

    EPA reviewed Michigan's December 18, 2020, submittal for 
consistency with sections 172(c)(3) CAA and 182(a)(1) of the CAA and 
with EPA's emissions inventory requirements. In particular, EPA 
reviewed the techniques used by EGLE to derive and quality assure the 
emissions estimates. EPA has also considered whether Michigan provided 
the public with the opportunity to review and comment on the 
development of the emissions estimates, whether Michigan confirmed that 
source facility emissions statements are required for the 2015 ozone 
standard, and whether the state addressed all public comments. EGLE 
documented the procedures used to estimate the emissions for each of 
the major source types. The documentation of the emissions estimation 
procedures is thorough and is adequate for EPA to determine that 
Michigan followed acceptable procedures to estimate the emissions. 
Accordingly, EPA concludes that Michigan has developed inventories of 
NOX and VOC emissions that are comprehensive and complete.

B. Emissions Statement Rule

    As mentioned earlier, EPA approved the portions of EGLE's December 
18, 2020, submittal pertaining to the certification of EGLE's 
stationary annual emissions statement regulation under the 2015 ozone 
NAAQS in a separate EPA action on July 6, 2022 (87 FR 40097). EGLE 
requested the removal of Act 348, Section 14a from the SIP which was 
repealed in 1995 and required annual fee payment by certain sources to 
EGLE. Act 348, Section 14a does not address the requirements related to 
attainment and maintenance of the NAAQS under Section 110 of the CAA. 
EPA has determined that Act 348, Section 14a was erroneously 
incorporated into the SIP. Instead, Act 348, Section 14a addresses the 
requirements under title V of the CAA for operating permit programs. 
EPA fully approved Michigan's title V Renewable Operating Permit 
Program on November 10, 2003 (68 FR 63735). Since Act 348, Section 14a 
has been repealed and does not address the requirements related to 
attainment and maintenance of the NAAQS under Section 110 of the CAA, 
EPA is approving EGLE's request to remove Act 348, Section 14a from the 
Michigan SIP.

V. Michigan's Public Notice and Comment

    Title 40 of the Code of Federal Regulations, part 51, appendix V 
requires that the State provide sufficient notice and opportunity for 
public comment and hearing on all SIP submittals. On September 7, 2020, 
EGLE notified the public of the 30-day period for the opportunity to 
comment, with respect to the requested SIP revisions pertaining to the 
emission inventories for the 2015 ozone NAAQS nonattainment areas and 
updates to the statewide emission statement program. The notification 
was published on EGLE's website at: https://www.michigan.gov/documents/deq/deq-aqd-sip-pub_notice_Info_610029_7.pdf. EGLE did not receive any 
public comments or requests for a public hearing by the stated date in 
the public notice, therefore, EGLE canceled the public hearing.

VI. What action is EPA taking?

    EPA is approving Michigan's SIP revision submitted on December 18, 
2020, to address the ozone-related emissions inventory requirements for 
the Allegan County, Berrien County, and Muskegon County ozone 
nonattainment areas for the 2015 ozone NAAQS. The emissions inventories 
we are approving into the SIP are specified in Tables 1 and 2, above. 
We are approving the emissions inventories because they contain 
comprehensive, accurate, and current inventories of actual emissions 
for all relevant sources in accordance with CAA sections 172(c)(3) and 
182(a), and because Michigan adopted the emissions inventories after 
providing for reasonable public notice and opportunity for a public 
hearing. We are also approving the removal of the repealed Act 348, 
Section 14a from the Michigan SIP, which does not address the 
requirements related to attainment

[[Page 2838]]

and maintenance of the NAAQS under Section 110 of the CAA, but rather 
addresses the requirements under title V of the CAA for operating 
permit programs. In addition, we are also correcting a typographical 
error contained in the codification of our own July 6, 2022 (87 FR 
40097), action. In that action, on page 40009, we incorrectly 
identified that we were approving sections 324.5003, 324.5524 and 
324.5525 of Act 451 of 1994, as amended, where the correct citations 
for the approved sections are 324.5503, 324.5524 and 324.5525.
    We are publishing this action without prior proposal because we 
view this as a noncontroversial amendment and anticipate no adverse 
comments. However, in the proposed rules section of this Federal 
Register publication, we are publishing a separate document that will 
serve as the proposal to approve the state plan if relevant adverse 
written comments are filed. This rule will be effective March 20, 2023 
without further notice unless we receive relevant adverse written 
comments by February 17, 2023. If we receive such comments, we will 
withdraw this action before the effective date by publishing a 
subsequent document that will withdraw the final action. All public 
comments received will then be addressed in a subsequent final rule 
based on the proposed action. EPA will not institute a second comment 
period. Any parties interested in commenting on this action should do 
so at this time. Please note that if EPA receives adverse comment on an 
amendment, paragraph, or section of this rule and if that provision may 
be severed from the remainder of the rule, EPA may adopt as final those 
provisions of the rule that are not the subject of an adverse comment. 
If we do not receive any comments, this action will be effective March 
20, 2023.

VII. Incorporation by Reference

    In this document, EPA is amending regulatory text that includes 
incorporation by reference. As described in Section III of this 
preamble and set forth in the amendments to 40 CFR part 52 below, EPA 
is removing provisions of the EPA-Approved Michigan Regulations from 
the Michigan State Implementation Plan, which is incorporated by 
reference in accordance with the requirements of 1 CFR part 51.

VIII. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP 
submission that complies with the provisions of the CAA and applicable 
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in 
reviewing SIP submissions, EPA's role is to approve state choices, 
provided that they meet the criteria of the CAA. Accordingly, this 
action merely approves state law as meeting Federal requirements and 
does not impose additional requirements beyond those imposed by state 
law. For that reason, this action:
     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);
     Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     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.);
     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);
     Does not have federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not an economically significant regulatory action based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     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
     Does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    In addition, the SIP is not approved to 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, the rule does not have tribal implications and will not impose 
substantial direct costs on tribal governments or preempt tribal law as 
specified by Executive Order 13175 (65 FR 67249, November 9, 2000).
    This action is subject to the Congressional Review Act, and EPA 
will submit a rule report to each House of the Congress and to the 
Comptroller General of the United States. This action is not a ``major 
rule'' as defined by 5 U.S.C. 804(2).
    Under section 307(b)(1) of the CAA, petitions for judicial review 
of this action must be filed in the United States Court of Appeals for 
the appropriate circuit by March 20, 2023. Filing a petition for 
reconsideration by the Administrator of this final rule does not affect 
the finality of this action for the purposes of judicial review nor 
does it extend the time within which a petition for judicial review may 
be filed, and shall not postpone the effectiveness of such rule or 
action. Parties with objections to this direct final rule are 
encouraged to file a comment in response to the parallel notice of 
proposed rulemaking for this action published in the proposed rules 
section of this Federal Register, rather than file an immediate 
petition for judicial review of this direct final rule, so that EPA can 
withdraw this direct final rule and address the comment in the proposed 
rulemaking. This action may not be challenged later in proceedings to 
enforce its requirements. (See section 307(b)(2).)

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Intergovernmental relations, Nitrogen dioxide, Ozone, 
Reporting and recordkeeping requirements, Volatile organic compounds.

    Dated: January 5, 2023.
Debra Shore,
Regional Administrator, Region 5.

    For the reasons stated in the preamble, EPA amends 40 CFR part 52 
as follows:

PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

0
1. The authority citation for part 52 continues to read as follows:

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

0
2. In Sec.  52.1170:
0
a. In paragraph (c) amend the table by:
0
i. Removing the entry for ``Act 348 of 1965, as amended'' with an EPA 
approval date of 7/6/2022; and
0
ii. Revising the entry for ``Act 451 of 1994, as amended''.
0
b. In paragraph (e) amend the table under the sub-heading ``Emissions 
Inventories'' by adding a second entry for ``2015 8-hour ozone 2017 
base year'' before the entry for ``1997 annual PM2.5 2005 
base year''.
    The revision and addition read as follows:

[[Page 2839]]

Sec.  52.1170  Identification of plan.

* * * * *
    (c) * * *

                                        EPA-Approved Michigan Regulations
----------------------------------------------------------------------------------------------------------------
                                                             State
        Michigan citation                 Title         effective date   EPA approval date         Comments
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
                                                  State Statues
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Act 451 of 1994, as amended......  Natural Resources         3/30/1995  7/6/2022, 87 FR      Only sections
                                    and Environmental                    40097.               324.5503, 324.5524
                                    Protection Act.                                           and 324.5525.
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

* * * * *
    (e) * * *

                       EPA-Approved Michigan Nonregulatory and Quasi-Regulatory Provisions
----------------------------------------------------------------------------------------------------------------
                                        Applicable
    Name of nonregulatory SIP         geographic or          State       EPA approval date         Comments
            provision               nonattainment area  submittal date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
                                              Emission Inventories
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
2015 8-hour ozone 2017 base year.  Allegan County           12/18/2020  1/18/2022, [INSERT
                                    (part), Berrien                      FEDERAL REGISTER
                                    County, and                          CITATION].
                                    Muskegon County
                                    (part).
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

* * * * *
[FR Doc. 2023-00369 Filed 1-17-23; 8:45 am]
BILLING CODE 6560-50-P