Document ID: EPA-R09-OAR-2021-0369-0001
Agency: epa
Document Type: Proposed Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: Arizona; Maricopa County Air Quality Department
Posted Date: 2021-06-23T04:00Z

[Federal Register Volume 86, Number 118 (Wednesday, June 23, 2021)]
[Proposed Rules]
[Pages 32848-32850]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-12923]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R09-OAR-2021-0369; FRL-10024-69-Region 9]

Air Plan Approval; Arizona; Maricopa County Air Quality 
Department

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve revisions to the Maricopa County Air Quality Department's 
(MCAQD) Rule 510 as part of the Arizona State Implementation Plan 
(SIP). These rule revisions concern revisions to the maximum levels of 
ambient air pollution for the protection of public health and welfare. 
We are proposing to approve this rule to regulate these emissions under 
the Clean Air Act (CAA or the Act). We are taking comments on this 
proposal and plan to follow with a final action.

DATES: Comments must be received on or before July 23, 2021.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R09-
OAR-2021-0369 at https://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

[[Page 32849]]

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, 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: Jeffrey Buss, EPA Region IX, (415) 
947-4152, buss.jeffrey@epa.gov.

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

Table of Contents

I. The State's Submittal
    A. What rules did the State submit?
    B. Are there other versions of these rules?
    C. What is the purpose of the submitted rule revisions?
II. The EPA's Evaluation and Proposed Action
    A. How is the EPA evaluating the rules?
    B. Do the rules meet the evaluation criteria?
    C. Public Comment and Proposed Action
III. Incorporation by Reference
IV. Statutory and Executive Order Reviews

I. The State's Submittal

A. What rules did the State submit?

    Table 1 lists the rule addressed by this proposal with the date it 
was amended and submitted by the MCAQD.

                                            Table 1--Submitted Rules
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           Local agency                Rule No.                 Title                 Amended        Submitted
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MCAQD.............................             510  Air Quality Standards.......      12/11/2019      12/20/2019
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    MCAQD's December 20, 2019 SIP revision submittal became complete by 
operation of law on June 20, 2020.

B. Are there other versions of these rules?

    We approved an earlier version of MCAQD Rule 510 into the SIP on 
November 9, 2009.\1\
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    \1\ 74 FR 57612.
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C. What is the purpose of the submitted rule revisions?

    MCAQD Rule 510 articulates the maximum levels of ambient air 
pollutants for the protection of public health and welfare. The 
revisions to MCAQD Rule 510 update the standards by lowering them to 
match the current National Ambient Air Quality Standards set forth in 
40 CFR part 50. MCAQD references the standards in Rule 510 in its air 
quality permitting rules. Additionally, the rule requires public 
notification of ambient air quality. The EPA's technical support 
document (TSD) has more information about the rule.

II. The EPA's Evaluation and Proposed Action

A. How is the EPA evaluating the rules?

    Rules in the SIP must be enforceable (see CAA section 110(a)(2)), 
must not interfere with applicable requirements concerning attainment 
and reasonable further progress (RFP) or other CAA requirements (see 
CAA section 110(l)), and must not modify certain SIP control 
requirements in nonattainment areas without ensuring equivalent or 
greater emissions reductions (see CAA section 193).

B. Do the rules meet the evaluation criteria?

    These rules are consistent with CAA requirements and relevant 
guidance regarding enforceability and SIP revisions. We propose 
approval of Rule 510 because it is more stringent than the version 
currently in the SIP and will not interfere with any applicable 
requirement concerning attainment and RFP, as required by CAA sections 
110(l) and 193. The TSD has more information on our evaluation.

C. Public Comment and Proposed Action

    As authorized in section 110(k)(3) of the Act, the EPA proposes to 
fully approve the submitted rule because it fulfills all relevant 
requirements. We will accept comments from the public on this proposal 
until July 23, 2021. If we take final action to approve the submitted 
rules, our final action will incorporate the rule into the federally 
enforceable SIP.

III. Incorporation by Reference

    In this rule, the EPA is proposing to include in a final EPA rule 
regulatory text that includes incorporation by reference. In accordance 
with requirements of 1 CFR 51.5, the EPA is proposing to incorporate by 
reference the MCAQD rule described in Table 1 of this preamble. The EPA 
has made, and will continue to make, these materials available through 
www.regulations.gov and at the EPA Region IX Office (please contact the 
person identified in the FOR FURTHER INFORMATION CONTACT section of 
this preamble for more information).

IV. Statutory and Executive Order Reviews

    Under the Clean Air Act, 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 Clean Air Act. 
Accordingly, this proposed action merely proposes to approve state 
regulations as meeting federal requirements and does not impose 
additional requirements beyond those imposed by state law. For that 
reason, this proposed 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);
     Is not an Executive Order 13771 (82 FR 9339, February 2, 
2017) regulatory action because SIP approvals are exempted under 
Executive Order 12866;
     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

[[Page 32850]]

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 Clean Air Act; and
     Does not provide the EPA with the discretionary authority 
to address disproportionate human health or environmental effects with 
practical, appropriate, 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 the EPA or an Indian tribe 
has demonstrated that a tribe has jurisdiction. In those areas of 
Indian country, the proposed 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).

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Carbon monoxide, 
Incorporation by reference, Intergovernmental relations, Lead, Nitrogen 
dioxide, Ozone, Particulate matter, Reporting and recordkeeping 
requirements, Sulfur dioxide.

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

    Dated: June 10, 2021.
Deborah Jordan,
Acting Regional Administrator, Region IX.
[FR Doc. 2021-12923 Filed 6-22-21; 8:45 am]
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