Document ID: EPA-R09-OAR-2022-0972-0007
Agency: epa
Document Type: Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: California; Second 10-Year Maintenance Plan for the Coso Junction PM–10 Planning Area
Posted Date: 2023-07-13T04:00Z

[Federal Register Volume 88, Number 133 (Thursday, July 13, 2023)]
[Rules and Regulations]
[Pages 44707-44710]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-14688]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R09-OAR-2022-0972; FRL-10529-02-R9]

Second 10-Year Maintenance Plan for the Coso Junction PM-10 
Planning Area; California

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: The Environmental Protection Agency (EPA) is taking final 
action to approve the ``Coso Junction PM10 Planning Area 
Second 10-Year Maintenance Plan'' (``Coso Junction Second Maintenance 
Plan'' or ``Plan'') as a revision to the state implementation plan 
(SIP) for the State of California. The Coso Junction Second Maintenance 
Plan includes, among other elements, a base year emissions inventory, a 
maintenance demonstration, and contingency provisions. The EPA is 
finalizing this action because the SIP revision meets the applicable 
statutory and regulatory requirements for such plans. The EPA is also 
taking final action to find the contribution of motor vehicle emissions 
to the area's continued attainment of the 1987 PM10 
standards to be insignificant. Once this insignificance finding is 
finalized, the area will not have to complete a regional emissions 
analysis for any transportation conformity determinations necessary for 
the Coso Junction Planning Area (CJPA).

DATES: This rule is effective August 14, 2023.

ADDRESSES: The EPA has established a docket for this action under 
Docket ID No. EPA- EPA-R09-OAR-2022-0972. All documents in the docket 
are listed on the https://www.regulations.gov website. Although listed 
in the index, some information is not publicly available, e.g., 
Confidential Business Information (CBI) or other information whose 
disclosure is restricted by statute. Certain other material, such as

[[Page 44708]]

copyrighted material, is not placed on the internet and will be 
publicly available only in hard copy form. Publicly available docket 
materials are available through https://www.regulations.gov, or please 
contact the person identified in the FOR FURTHER INFORMATION CONTACT 
section for additional availability information. If you need assistance 
in a language other than English or if you are a person with a 
disability who needs a reasonable accommodation at no cost to you, 
please contact the person identified in the FOR FURTHER INFORMATION 
CONTACT section.

FOR FURTHER INFORMATION CONTACT: Lindsay Wickersham, Planning Section 
(AIR-2-1), EPA Region IX, 75 Hawthorne Street, San Francisco, CA 94105, 
(415) 947-4192, or by email at [email protected].

SUPPLEMENTARY INFORMATION: Throughout this document, ``we,'' ``us,'' 
and ``our'' refer to the EPA.

Table of Contents

I. Summary of Proposed Rule
II. Public Comments and EPA Responses
III. Air Quality Conditions Since Proposal
IV. Environmental Justice Considerations
V. Final Action
VI. Statutory and Executive Order Reviews

I. Summary of Proposed Rule

    On March 30, 2023, the EPA proposed to approve the Coso Junction 
Second Maintenance Plan prepared by the Great Basin Unified Air 
Pollution Control District (GBUAPCD) and submitted by the California 
Air Resources Board (CARB) on October 21, 2021, as a revision to the 
California SIP.\1\ In doing so, we proposed to find that the Coso 
Junction Second Maintenance Plan adequately demonstrates that the CJPA 
will maintain the 1987 annual national ambient air quality standards 
(NAAQS or ``standards'') for particulate matter of ten microns or less 
(PM10) through the year 2030 (i.e., for more than 10 years 
beyond the first 10-year maintenance period), with the maintenance 
period ending on October 4, 2030. We also proposed to find that the 
Plan includes sufficient contingency provisions to promptly correct any 
violation of the PM10 standards that may occur. Lastly, we 
proposed to find that motor vehicle related PM10 emissions 
do not contribute significantly to the PM10 air quality 
problem in the CJPA based on consideration of the factors identified in 
Sec.  93.109(f) of the EPA's transportation conformity regulations.\2\
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    \1\ 88 FR 19034.
    \2\ 40 CFR part 93.
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    The EPA announced the availability of the Plan and motor vehicle 
emissions insignificance finding on the EPA's transportation conformity 
website on April 3, 2023, and requested comments by May 3, 2023. We 
received no comments in response to the adequacy review posting.

II. Public Comments and EPA Responses

    The EPA's proposed action provided a 30-day public comment period 
that ended on May 1, 2023. We received no comments on our proposal 
during the comment period.

III. Air Quality Conditions Since Proposal

    As part of our proposal, we evaluated complete, quality-assured, 
and certified, data available at the time (i.e., through 2021).\3\ 
These data indicated that there had been four exceedances of the 
PM10 NAAQS in the CJPA between 2018 and 2020. The District 
and CARB provided information to the EPA about the September 7, 2020 
exceedance that explained that the exceedance was not within the 
State's control.\4\ As conveyed in the EPA's concurrence letter, we 
concurred that, based on the weight of evidence, the September 7, 2020 
exceedance was caused by an exceptional event due to the Creek Fire in 
the Sierra National Forest and the SQF Complex wildfire in the Sequoia 
National Forest.\5\ Based on a review of air quality data during the 
three-year period covered by the Plan (2018-2020) and excluding the 
exceedance flagged by CARB and GBUAPCD and concurred with by the EPA as 
an exceptional event, we find that the 2020 design value for the Coso 
Junction PM10 nonattainment area is 1.0 and that the area 
maintained the PM10 standards in that year.
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    \3\ 88 FR 19034, 19036.
    \4\ Email dated August 24, 2021, from Candace Clawson, CARB, to 
Michael Benjamin, CARB, Subject: ``CARB letter to EPA GBUAPCD 
PM10NEE_signed, EPA Cvr Ltr--2021 2nd Maint. Plan-EE 
Submittal-2021073_signed and GBUAPCD Exceptional Event Demonstration 
September 7 2020 FINAL,'' with three attachments. While submitted by 
CARB, the demonstrations and addendums were developed through a 
joint effort by CARB and the GBUAPCD.
    \5\ Email dated July 12, 2022, from Anna Mebust, EPA Region IX, 
to Sylvia Vanderspek, CARB, Subject: ``EPA Concurrence on 2020 PM10 
Wildfire Exceptional Event,'' with attachments, 
``DD_Concurrence_Letter.pdf;'' 
``CosoJunctionWildfirePM10_ConcurrenceTSD.pdf.''
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    In 2021, there were three additional exceedances of the 
PM10 NAAQS in the area. These additional exceedances in 2021 
caused the number of exceedances recorded at the air monitor averaged 
over three consecutive years (i.e., 2019-2021) to be greater than 1.05. 
However, we do not think these data contradict the EPA's finding that 
the State's plan provides for maintenance of the PM10 NAAQS 
under section 175A(b) of the Clean Air Act (CAA). The District and CARB 
provided information to the EPA about the six exceedances that occurred 
in 2019-2021 that explained that three of the exceedances were not 
within the State's nor District's control.\6\ The information provided 
indicates that the September 7, 2020, September 19, 2021, and September 
27, 2021 exceedances were all caused by wildfire smoke. The EPA has 
reviewed the information provided by the State regarding the 2019-2021 
exceedances, and we agree that this information does not call into 
question the EPA's proposed approval of the Coso Junction Second 
Maintenance Plan as providing for maintenance of the PM10 
NAAQS. We note as well that the State's analysis and the EPA's 
evaluation are consistent with the proposed changes to the maintenance 
plan that the EPA is approving in this final action to evaluate data 
that may have been influenced by certain events in determining whether 
contingency provisions should be triggered.
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    \6\ Submitted via email on September 1, 2022, from Sylvia 
Vanderspek, CARB to Gwen Yoshimura, EPA Region IX, Subject: ``FW: 
Coso Junction Initial Notification Forms for 2nd PM10 MP 
Contingency,'' with attachments, ``INI 2010-2020 Coso Junction 
PM10.pdf,'' ``Discussion of PM10 Exceedances 
at Coso Junction 2010 through 2021.pdf,'' ``INI 2021 Coso Junction 
PM10.pdf,'' and ``Coso Junction 2021 Wildfire Smoke 
Exceedances.pdf.''
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    As part of this final action, we evaluated complete, quality-
assured, and certified data available for 2022.\7\ These data indicated 
that there had been one exceedance of the PM10 NAAQS in the 
CJPA in 2022.\8\ Given the EPA's agreement that the 2021 exceedances do 
not call into question the EPA's proposal to approve the Coso Junction 
Second Maintenance Plan as providing for maintenance of the NAAQS, the 
State is not required at this time to submit additional information and 
analyses for the 2022 exceedance, because such exceedance, without the 
2021 exceedances, would not on its own cause a violation of the NAAQS. 
Upon the effective date of this final action, if additional exceedances 
occur in 2023 or a later year such that the number of exceedances 
averaged over three

[[Page 44709]]

consecutive years is greater than 1.05, per Section 7 of the Plan, the 
State will be required to submit information regarding those 
exceedances if it wishes to request that the exceedances be excluded 
from the contingency trigger calculation. The EPA will review such 
information and will notify the State whether the contingency 
provisions have been triggered per the schedule outlined in the Plan.
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    \7\ Email dated May 1, 2023, from Fletcher Clover, EPA Region 
IX, to Chris Howard, GBUAPCD, Subject: ``RE: Great Basin Unified 
APCD Ambient Air Monitoring Data Certification for 2022,'' with 
attachments, ``Great Basin 2022 AQS data certification--
AMP450NC_2102387 with EPA concurrence flags.pdf'' and ``Great Basin 
2022 AQS data certification--AMP600_2102385 with EPA concurrence 
flags.pdf.''
    \8\ EPA Air Quality System Design Value Report, AMP480, accessed 
May 9, 2023 (User ID: STSAI, Report Request ID: 2104344).
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IV. Environmental Justice Considerations

    As described in detail in our proposal, the EPA reviewed 
demographic data, which provides an assessment of individual 
demographic groups of the populations living within the southwest 
portions of Inyo County.\9\ The EPA then compared the data to the 
corresponding data for the United States as a whole for each of the 
demographic groups. The results of this analysis are being provided for 
informational and transparency purposes.
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    \9\ 88 FR 19034, 19044.
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    This final action approves the Coso Junction Second Maintenance 
Plan, which provides for the continued maintenance of the 
PM10 NAAQS. We expect that this action will generally be 
neutral or contribute to reduced environmental and health impacts on 
all populations in the CJPA, including people of color and low-income 
populations. Further, there is no information in the record indicating 
that this action is expected to have disproportionately high or adverse 
human health or environmental effects on a particular group of people.

V. Final Action

    For the reasons discussed in our proposed action and herein, the 
EPA is taking final action to approve the Coso Junction Second 
Maintenance Plan, submitted by CARB on October 20, 2021, as a revision 
to the California SIP. We are approving the maintenance demonstration 
and contingency provisions as meeting all of the applicable 
requirements for maintenance plans and related contingency provisions 
in CAA section 175A, and we are finalizing an insignificance finding 
for motor vehicle emissions in the CJPA.

VI. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP 
submission that complies with the provisions of the Act and applicable 
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in 
reviewing SIP submissions, the 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 14094 (88 FR 21879, April 11, 2023);
     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 subject to Executive Order 13045 (62 FR 19885, 
April 23, 1997) because it approves a State program;
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001); and
     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.
    In addition, there are no areas of Indian country within the CJPA, 
and the State plan is not approved to apply on any Indian reservation 
land or in any other area where the 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).
    Executive Order 12898 (Federal Actions To Address Environmental 
Justice in Minority Populations and Low-Income Populations, 59 FR 7629, 
Feb. 16, 1994) directs Federal agencies to identify and address 
``disproportionately high and adverse human health or environmental 
effects'' of their actions on minority populations and low-income 
populations to the greatest extent practicable and permitted by law. 
The EPA defines environmental justice (EJ) as ``the fair treatment and 
meaningful involvement of all people regardless of race, color, 
national origin, or income with respect to the development, 
implementation, and enforcement of environmental laws, regulations, and 
policies.'' The EPA further defines the term fair treatment to mean 
that ``no group of people should bear a disproportionate burden of 
environmental harms and risks, including those resulting from the 
negative environmental consequences of industrial, governmental, and 
commercial operations or programs and policies.''
    The air agency did not evaluate EJ considerations as part of its 
SIP submittal; the CAA and applicable implementing regulations neither 
prohibit nor require such an evaluation. The EPA's evaluation of 
environmental justice is described in the section of this document 
titled, ``Environmental Justice Considerations.'' The analysis was done 
for the purpose of providing additional context and information about 
this rulemaking to the public, not as a basis of the action. Due to the 
nature of the action being taken here, this action is expected to have 
a neutral to positive impact on the air quality of the affected area. 
In addition, there is no information in the record upon which this 
decision is based that is inconsistent with the stated goal of E.O. 
12898 of achieving environmental justice for people of color, low-
income populations, and Indigenous peoples.
    This action is subject to the Congressional Review Act, and the 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 September 
11, 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. 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, Ammonia, 
Incorporation by reference, Intergovernmental relations, Nitrogen 
dioxide, Particulate matter, Reporting

[[Page 44710]]

and recordkeeping requirements, Sulfur dioxide, Volatile organic 
compounds.

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

    Dated: July 3, 2023.
Martha Guzman Aceves,
Regional Administrator, Region IX.

    For the reasons stated in the preamble, the Environmental 
Protection Agency amends part 52, chapter I, title 40 of the Code of 
Federal Regulations 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.

Subpart F--California

0
2. Section 52.220 is amended by adding paragraph (c)(603) to read as 
follows:

Sec.  52.220  Identification of plan--in part.

* * * * *
    (c) * * *
    (604) The following plan was submitted electronically on October 
21, 2021, by the Governor's designee as an attachment to a letter dated 
October 20, 2021.
    (i) [Reserved]
    (ii) Additional materials. (A) Great Basin Unified Air Pollution 
Control District.
    (1) Coso Junction PM10 Planning Area Second 10-Year 
Maintenance Plan, adopted on September 23, 2021.
    (2) [Reserved]
    (B) [Reserved]

[FR Doc. 2023-14688 Filed 7-12-23; 8:45 am]
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