Approval and Promulgation of Air Quality Implementation Plans; State of Montana Second 10-Year Carbon Monoxide Maintenance Plan for Billings, 16571-16573 [2015-07227]

Download as PDF 16571 Federal Register / Vol. 80, No. 60 / Monday, March 30, 2015 / Rules and Regulations State effective date Article XX or XXI citation Title/subject * 2101.20 .......................... * * Definitions .................... * * 4/3/2012 * EPA approval date Additional explanation/§ 52.2063 citation * * 3/30/2015 [Insert Federal Register citation]. * * Revise the latest entry dated 11/26/14, 79 FR 70471 by revising the existing definition of ‘‘Major Source’’ and ‘‘Major Modification’’. * * * * * * 3/30/2015 [Insert Federal Register citation]. * * Part B—Permits Generally * 2102.04 .......................... * * Permits Generally ........ * 2102.06 .......................... * Major Sources Locating in or Impacting a Nonattainment Area. * 2102.08 .......................... * Emission Offset Registration. * * * * * * 4/3/2012 * 4/3/2012 * 4/3/2012 * * [FR Doc. 2015–07106 Filed 3–27–15; 8:45 am] * 3/30/2015 [Insert Federal Register citation]. * * 3/30/2015 [Insert Federal Register citation]. * ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 asabaliauskas on DSK5VPTVN1PROD with RULES [EPA–R08–OAR–2012–0352; FRL–9925–51– Region 8] Approval and Promulgation of Air Quality Implementation Plans; State of Montana Second 10-Year Carbon Monoxide Maintenance Plan for Billings Environmental Protection Agency (EPA). AGENCY: 22:39 Mar 27, 2015 Jkt 235001 PO 00000 Frm 00025 Fmt 4700 * Sfmt 4700 ACTION: * * * BILLING CODE 6560–50–P VerDate Sep<11>2014 * * As per request by PADEP in a letter to EPA dated June 27, 2014, the following language appearing at paragraph b.1; subparagraph b.3.A; and Subsections e and g, is excluded from the SIP: ‘‘Additions, revisions, or deletions to such regulations by the Commonwealth are incorporated in this Subsection and are effective on the date established by the state regulation, unless otherwise established by regulation under this Article.’’ As per letter from PADEP dated 2/20/2013, the June 25, 2012 SIP submission inadvertently deleted language from the end of subsection (f) of the regulation submitted with SIP submittal. The SIP revision incorporating Article XXI § 2102.06(f) should read as follows ‘‘f. Requirements for Modeling. Where air quality models are used to meet the provisions of this section, modeling shall be based on the applicable models and other requirements specified in 40 CFR Part 51 Appendix W (Guideline on Air Quality Models). Where an air quality model is inappropriate, the model may be modified or another model may be substituted only on a case-by-case basis at the Department’s discretion upon written approval by the administrator of EPA. In addition, use of a modified or substituted model must be subject to notice and opportunity for public comment under procedures set forth in 40 CFR 51.102.’’ * Final rule. The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Montana. On July 13, 2011, the Governor of Montana’s designee submitted to EPA a second 10-year maintenance plan for the Billings area for the carbon monoxide (CO) National Ambient Air Quality Standard (NAAQS). This maintenance plan addresses maintenance of the CO NAAQS for a second 10-year period beyond the original redesignation. EPA SUMMARY: E:\FR\FM\30MRR1.SGM 30MRR1 16572 Federal Register / Vol. 80, No. 60 / Monday, March 30, 2015 / Rules and Regulations is also approving an alternative monitoring strategy for the Billings CO maintenance area, which was submitted by the Governor’s designee on June 22, 2012. This final rule is effective April 29, 2015. DATES: EPA has established a docket for this action under Docket Identification No. EPA–R08–OAR– 2012–0352. All documents in the docket are listed in the www.regulations.gov index. Although listed in the index, some information is not publicly available, e.g., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, will be publicly available only in hard copy. Publicly available docket materials are available either electronically in www.regulations.gov or in hard copy at the Air Program, Environmental Protection Agency (EPA), Region 8, 1595 Wynkoop St., Denver, Colorado 80202–1129. EPA requests that if at all possible, you contact the individual listed in the FOR FURTHER INFORMATION CONTACT section to view the hard copy of the docket. You may view the hard copy of the docket Monday through Friday, 8:00 a.m. to 4:00 p.m., excluding Federal holidays. ADDRESSES: FOR FURTHER INFORMATION CONTACT: Adam Clark, EPA, Region 8, Mailcode 8P–AR, 1595 Wynkoop Street, Denver, Colorado 80202–1129, (303) 312–7104, clark.adam@epa.gov. SUPPLEMENTARY INFORMATION: Definitions asabaliauskas on DSK5VPTVN1PROD with RULES For the purpose of this document, we are giving meaning to certain words or initials as follows: (i) The words or initials Act or CAA mean or refer to the Clean Air Act, unless the context indicates otherwise. (ii) The initials CO mean or refer to carbon monoxide. (iii) The words EPA, we, us or our mean or refer to the United States Environmental Protection Agency. (iv) The initials NAAQS mean or refer to the National Ambient Air Quality Standards. (v) The initials SIP mean or refer to State Implementation Plan. (vi) The words Montana and State mean or refer to the State of Montana. second 10-year period.1 This maintenance plan must demonstrate continued compliance with the NAAQS during this second 10-year period. On July 13, 2011, the Governor of Montana’s designee submitted to EPA a second 10-year maintenance plan for the Billings area for the CO NAAQS. Along with the revised Billings Maintenance Plan, the State submitted a CO maintenance plan for the Great Falls, Montana maintenance area, and an alternative strategy for monitoring continued attainment of the CO NAAQS in all of the State’s CO maintenance areas on July 13, 2011.2 The State submitted the alternative monitoring strategy in order to conserve resources by discontinuing the gaseous CO ambient monitors in both the Billings and Great Falls CO maintenance areas. We commented on the State’s ‘‘Alternative Monitoring Strategy,’’ and the State submitted a revised version of the strategy, which incorporated our comments on June 22, 2012. In a document published on December 2, 2014, we proposed approval of the Billings second 10-year maintenance plan and the associated ‘‘Alternative Monitoring Strategy.’’ (79 FR 71369) II. Response to Comments The comment period for our December 2, 2014 proposed rule was open for 30 days. We did not receive any comments on the proposed action. III. Final Action EPA is approving the revised Billings Maintenance Plan submitted on July 13, 2011. This maintenance plan meets the applicable CAA requirements and EPA has determined it is sufficient to provide for maintenance of the CO NAAQS over the course of the second 10-year maintenance period out to 2022. EPA is also approving the State’s Alternative Monitoring Strategy, submitted on June 22, 2012, for the Billings CO maintenance area. We are not approving application of the Alternative Monitoring Strategy in other areas of Montana with this action, as the Alternative Monitoring Strategy must be considered on a case-by-case basis specific to the circumstances of each particular CO maintenance area rather than broadly. I. Background Eight years after an area is redesignated to attainment, Clean Air Act (CAA) section 175A(b) requires the state to submit a subsequent maintenance plan to EPA, covering a VerDate Sep<11>2014 22:39 Mar 27, 2015 Jkt 235001 1 In this case, the initial maintenance period extended through 2012. Thus, the second 10-year period extends through 2022. 2 In addition to Billings and Great Falls, the Missoula, MT CO maintenance area was included in the July 13, 2011 Alternative Monitoring Strategy. PO 00000 Frm 00026 Fmt 4700 Sfmt 4700 IV. Statutory and Executive Orders Review 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, EPA’s role is to approve state choices, provided that they meet the criteria of the Clean Air Act. 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 Clean Air Act; 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 E:\FR\FM\30MRR1.SGM 30MRR1 Federal Register / Vol. 80, No. 60 / Monday, March 30, 2015 / Rules and Regulations 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). The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the Small Business Regulatory Enforcement Fairness Act of 1996, generally provides that before a rule may take effect, the agency promulgating the rule must submit a rule report, which includes a copy of the rule, to each House of the Congress and to the Comptroller General of the United States. EPA will submit a report containing this action and other required information to the U.S. Senate, the U.S. House of Representatives, and the Comptroller General of the United States prior to publication of the rule in the Federal Register. A major rule cannot take effect until 60 days after it is published in the Federal Register. This action is not a ‘‘major rule’’ as defined by 5 U.S.C. 804(2). Under section 307(b)(1) of the Clean Air Act, petitions for judicial review of this action must be filed in the United States Court of Appeals for the appropriate circuit by May 29, 2015. 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, Carbon monoxide, Incorporation by reference, Intergovernmental relations, Reporting and recordkeeping requirements. Authority: 42 U.S.C. 7401 et seq. Dated: March 17, 2015. Debra H. Thomas, Acting Regional Administrator, Region 8. 40 CFR part 52 is amended to read as follows: asabaliauskas on DSK5VPTVN1PROD with RULES PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS 1. The authority citation for Part 52 continues to read as follows: ■ Authority: 42 U.S.C. 7401 et seq. Subpart BB—Montana 2. Section 52.1373 is amended by revising paragraph (b) to read as follows: ■ VerDate Sep<11>2014 22:39 Mar 27, 2015 Jkt 235001 § 52.1373 Control strategy: Carbon monoxide. * * * * * (b) Revisions to the Montana State Implementation Plan, revised Carbon Monoxide Maintenance Plan for Billings, as submitted by the Governor’s Designee on July 13, 2011, and the associated Alternative Monitoring Strategy for Billings, as submitted by the Governor’s Designee on June 22, 2012. * * * * * [FR Doc. 2015–07227 Filed 3–27–15; 8:45 am] BILLING CODE 6560–50–P ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA–R06–OAR–2015–0033; FRL–9925–19– Region 6] Approval and Promulgation of Implementation Plans; Texas; Public Participation for Air Quality Permit Applications Environmental Protection Agency (EPA). ACTION: Direct final rule. AGENCY: The Environmental Protection Agency (EPA) is taking a direct final action to approve two provisions submitted by the State of Texas as revisions to the Texas State Implementation Plan (SIP) on July 2, 2010, specific to the applicability of the public notice requirements to applications for Plant-Wide Applicability (PAL) permits and standard permits for concrete batch plants without enhanced controls. Today’s direct final action will complete the rulemaking process started in our December 13, 2012, proposal and approve the public notice provisions into the Texas SIP. The EPA is also taking direct final action to convert the public notice applicability provisions for Texas Flexible Permits from a final conditional approval to a full approval. The EPA is taking this action under section 110 and parts C and D of the Clean Air Act (CAA or the Act). DATES: This rule is effective on May 29, 2015 without further notice, unless the EPA receives relevant adverse comments by April 29, 2015. If the EPA receives such comments, the EPA will publish a timely withdrawal in the Federal Register informing the public that this rule will not take effect. ADDRESSES: Submit your comments, identified by Docket No. EPA–R06– OAR–2015–0033, by one of the following methods: SUMMARY: PO 00000 Frm 00027 Fmt 4700 Sfmt 4700 16573 • https://www.regulations.gov: Follow the on-line instructions. • Email: Adina Wiley at wiley.adin& • Mail or delivery: Ms. Adina Wiley, Air Permits Section (6PD–R), Environmental Protection Agency, 1445 Ross Avenue, Suite 1200, Dallas, Texas 75202–2733. Instructions: Direct your comments to Docket ID No. EPA–R06–OAR–2015– 0033. The EPA’s policy is that all comments received will be included in the public docket without change and may be made available online at https://www.regulations.gov, including any personal information provided, unless the comment includes information claimed to be Confidential Business Information (CBI) or other information the disclosure of which is restricted by statute. Do not submit information through https:// www.regulations.gov or email, if you believe that it is CBI or otherwise protected from disclosure. The https:// www.regulations.gov Web site is an ‘‘anonymous access’’ system, which means that the EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an email comment directly to the EPA without going through https:// www.regulations.gov, your email address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the Internet. If you submit an electronic comment, the EPA recommends that you include your name and other contact information in the body of your comment along with any disk or CD–ROM submitted. If the EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, the EPA may not be able to consider your comment. Electronic files should avoid the use of special characters and any form of encryption and should be free of any defects or viruses. For additional information about the EPA’s public docket, visit the EPA Docket Center homepage at https://www.epa.gov/ epahome/dockets.htm. Docket: The index to the docket for this action is available electronically at www.regulations.gov and in hard copy at EPA Region 6, 1445 Ross Avenue, Suite 700, Dallas, Texas. While all documents in the docket are listed in the index, some information may be publicly available only at the hard copy location (e.g., copyrighted material), and some may not be publicly available at either location (e.g., CBI). FOR FURTHER INFORMATION CONTACT: Ms. Adina Wiley, 214–665–2115, E:\FR\FM\30MRR1.SGM 30MRR1

Agencies

[Federal Register Volume 80, Number 60 (Monday, March 30, 2015)]
[Rules and Regulations]
[Pages 16571-16573]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2015-07227]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R08-OAR-2012-0352; FRL-9925-51-Region 8]


Approval and Promulgation of Air Quality Implementation Plans; 
State of Montana Second 10-Year Carbon Monoxide Maintenance Plan for 
Billings

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The Environmental Protection Agency (EPA) is approving a State 
Implementation Plan (SIP) revision submitted by the State of Montana. 
On July 13, 2011, the Governor of Montana's designee submitted to EPA a 
second 10-year maintenance plan for the Billings area for the carbon 
monoxide (CO) National Ambient Air Quality Standard (NAAQS). This 
maintenance plan addresses maintenance of the CO NAAQS for a second 10-
year period beyond the original redesignation. EPA

[[Page 16572]]

is also approving an alternative monitoring strategy for the Billings 
CO maintenance area, which was submitted by the Governor's designee on 
June 22, 2012.

DATES: This final rule is effective April 29, 2015.

ADDRESSES: EPA has established a docket for this action under Docket 
Identification No. EPA-R08-OAR-2012-0352. All documents in the docket 
are listed in the www.regulations.gov index. Although listed in the 
index, some information is not publicly available, e.g., CBI or other 
information whose disclosure is restricted by statute. Certain other 
material, such as copyrighted material, will be publicly available only 
in hard copy. Publicly available docket materials are available either 
electronically in www.regulations.gov or in hard copy at the Air 
Program, Environmental Protection Agency (EPA), Region 8, 1595 Wynkoop 
St., Denver, Colorado 80202-1129. EPA requests that if at all possible, 
you contact the individual listed in the FOR FURTHER INFORMATION 
CONTACT section to view the hard copy of the docket. You may view the 
hard copy of the docket Monday through Friday, 8:00 a.m. to 4:00 p.m., 
excluding Federal holidays.

FOR FURTHER INFORMATION CONTACT: Adam Clark, EPA, Region 8, Mailcode 
8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129, (303) 312-
7104, clark.adam@epa.gov.

SUPPLEMENTARY INFORMATION: 

Definitions

    For the purpose of this document, we are giving meaning to certain 
words or initials as follows:

    (i) The words or initials Act or CAA mean or refer to the Clean 
Air Act, unless the context indicates otherwise.
    (ii) The initials CO mean or refer to carbon monoxide.
    (iii) The words EPA, we, us or our mean or refer to the United 
States Environmental Protection Agency.
    (iv) The initials NAAQS mean or refer to the National Ambient 
Air Quality Standards.
    (v) The initials SIP mean or refer to State Implementation Plan.
    (vi) The words Montana and State mean or refer to the State of 
Montana.

I. Background

    Eight years after an area is redesignated to attainment, Clean Air 
Act (CAA) section 175A(b) requires the state to submit a subsequent 
maintenance plan to EPA, covering a second 10-year period.\1\ This 
maintenance plan must demonstrate continued compliance with the NAAQS 
during this second 10-year period. On July 13, 2011, the Governor of 
Montana's designee submitted to EPA a second 10-year maintenance plan 
for the Billings area for the CO NAAQS.
---------------------------------------------------------------------------

    \1\ In this case, the initial maintenance period extended 
through 2012. Thus, the second 10-year period extends through 2022.
---------------------------------------------------------------------------

    Along with the revised Billings Maintenance Plan, the State 
submitted a CO maintenance plan for the Great Falls, Montana 
maintenance area, and an alternative strategy for monitoring continued 
attainment of the CO NAAQS in all of the State's CO maintenance areas 
on July 13, 2011.\2\ The State submitted the alternative monitoring 
strategy in order to conserve resources by discontinuing the gaseous CO 
ambient monitors in both the Billings and Great Falls CO maintenance 
areas. We commented on the State's ``Alternative Monitoring Strategy,'' 
and the State submitted a revised version of the strategy, which 
incorporated our comments on June 22, 2012.
---------------------------------------------------------------------------

    \2\ In addition to Billings and Great Falls, the Missoula, MT CO 
maintenance area was included in the July 13, 2011 Alternative 
Monitoring Strategy.
---------------------------------------------------------------------------

    In a document published on December 2, 2014, we proposed approval 
of the Billings second 10-year maintenance plan and the associated 
``Alternative Monitoring Strategy.'' (79 FR 71369)

II. Response to Comments

    The comment period for our December 2, 2014 proposed rule was open 
for 30 days. We did not receive any comments on the proposed action.

III. Final Action

    EPA is approving the revised Billings Maintenance Plan submitted on 
July 13, 2011. This maintenance plan meets the applicable CAA 
requirements and EPA has determined it is sufficient to provide for 
maintenance of the CO NAAQS over the course of the second 10-year 
maintenance period out to 2022.
    EPA is also approving the State's Alternative Monitoring Strategy, 
submitted on June 22, 2012, for the Billings CO maintenance area. We 
are not approving application of the Alternative Monitoring Strategy in 
other areas of Montana with this action, as the Alternative Monitoring 
Strategy must be considered on a case-by-case basis specific to the 
circumstances of each particular CO maintenance area rather than 
broadly.

IV. Statutory and Executive Orders Review

    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, EPA's role is to approve state 
choices, provided that they meet the criteria of the Clean Air Act. 
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 Clean Air Act; 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

[[Page 16573]]

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).
    The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the 
Small Business Regulatory Enforcement Fairness Act of 1996, generally 
provides that before a rule may take effect, the agency promulgating 
the rule must submit a rule report, which includes a copy of the rule, 
to each House of the Congress and to the Comptroller General of the 
United States. EPA will submit a report containing this action and 
other required information to the U.S. Senate, the U.S. House of 
Representatives, and the Comptroller General of the United States prior 
to publication of the rule in the Federal Register. A major rule cannot 
take effect until 60 days after it is published in the Federal 
Register. This action is not a ``major rule'' as defined by 5 U.S.C. 
804(2).
    Under section 307(b)(1) of the Clean Air Act, petitions for 
judicial review of this action must be filed in the United States Court 
of Appeals for the appropriate circuit by May 29, 2015. 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, Carbon monoxide, 
Incorporation by reference, Intergovernmental relations, Reporting and 
recordkeeping requirements.

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

    Dated: March 17, 2015.
Debra H. Thomas,
Acting Regional Administrator, Region 8.

    40 CFR part 52 is amended to read 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 BB--Montana

0
2. Section 52.1373 is amended by revising paragraph (b) to read as 
follows:


Sec.  52.1373  Control strategy: Carbon monoxide.

* * * * *
    (b) Revisions to the Montana State Implementation Plan, revised 
Carbon Monoxide Maintenance Plan for Billings, as submitted by the 
Governor's Designee on July 13, 2011, and the associated Alternative 
Monitoring Strategy for Billings, as submitted by the Governor's 
Designee on June 22, 2012.
* * * * *

[FR Doc. 2015-07227 Filed 3-27-15; 8:45 am]
BILLING CODE 6560-50-P
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