81_FR_11771 81 FR 11727 - Designation of Areas for Air Quality Planning Purposes; Redesignation Request and Associated Maintenance Plan for Billings, MT 2010 SO2

81 FR 11727 - Designation of Areas for Air Quality Planning Purposes; Redesignation Request and Associated Maintenance Plan for Billings, MT 2010 SO2

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 81, Issue 44 (March 7, 2016)

Page Range11727-11734
FR Document2016-04900

On December 14, 2015, the State of Montana submitted a request for the Environmental Protection Agency (EPA) to redesignate the Billings, Montana, 2010 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS) nonattainment area to attainment and to approve a State Implementation Plan (SIP) revision containing a maintenance plan for the area. In response to this submittal, the EPA is proposing to take the following actions: Determine that the Billings SO<INF>2</INF> nonattainment area is attaining the 2010 SO<INF>2</INF> primary NAAQS; approve Montana's plan for maintaining attainment of the 2010 SO<INF>2</INF> primary NAAQS in the area; and redesignate the Billings SO<INF>2</INF> nonattainment area to attainment for the 2010 SO<INF>2</INF> primary NAAQS.

Federal Register, Volume 81 Issue 44 (Monday, March 7, 2016)
[Federal Register Volume 81, Number 44 (Monday, March 7, 2016)]
[Proposed Rules]
[Pages 11727-11734]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2016-04900]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R08-OAR-2015-0205; FRL-9943-27-Region 8]


Designation of Areas for Air Quality Planning Purposes; 
Redesignation Request and Associated Maintenance Plan for Billings, MT 
2010 SO2 Nonattainment Area

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: On December 14, 2015, the State of Montana submitted a request 
for the Environmental Protection Agency (EPA) to redesignate the 
Billings, Montana, 2010 sulfur dioxide (SO2) National 
Ambient Air Quality Standard (NAAQS) nonattainment area to attainment 
and to approve a State Implementation Plan (SIP) revision containing a 
maintenance plan for the area. In response to this submittal, the EPA 
is proposing to take the following actions: Determine that the Billings 
SO2 nonattainment area is attaining the 2010 SO2 
primary NAAQS; approve Montana's plan for maintaining attainment of the 
2010 SO2 primary NAAQS in the area; and redesignate the 
Billings SO2 nonattainment area to attainment for the 2010 
SO2 primary NAAQS.

DATES: Comments must be received on or before April 6, 2016.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R08-
OAR-2015-0205, at http://www.regulations.gov Web site. Follow the 
online instructions for submitting comments. Once submitted, comments 
cannot be edited or removed from regulations.gov. The 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. 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, the full EPA 
public comment policy, information about CBI or multimedia submissions, 
and general guidance on making effective comments, please visit http://www2.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Adam Clark, Air Program, U.S. 
Environmental Protection Agency, Region 8, Mailcode 8P-AR, 1595 
Wynkoop, Denver, Colorado 80202-1129, (303) 312-7104, 
[email protected].

SUPPLEMENTARY INFORMATION:

I. General Information

What should I consider as I prepare my comments for EPA?

    1. Submitting Confidential Business Information (CBI). Do not 
submit CBI to the EPA through www.regulations.gov or email. Clearly 
mark the part or all of the information that you claim to be CBI. For 
CBI information in a disk or CD ROM that you mail to the EPA, mark the 
outside of the disk or CD ROM as CBI and then identify electronically 
within the disk or CD ROM the specific information that is claimed as 
CBI. In addition to one complete version of the comment that includes 
information claimed as CBI, a copy of the comment that does not contain 
the information claimed as CBI must be submitted for inclusion in the 
public docket. Information so marked will not be disclosed except in 
accordance with procedures set forth in 40 CFR part 2.
    2. Tips for Preparing Your Comments. When submitting comments, 
remember to:
     Identify the rulemaking by docket number and other 
identifying information (subject heading, Federal Register date and 
page number).
     Follow directions--The agency may ask you to respond to 
specific questions or organize comments by referencing a Code of 
Federal Regulations (CFR) part or section number.
     Explain why you agree or disagree; suggest alternatives 
and substitute language for your requested changes.
     Describe any assumptions and provide any technical 
information and/or data that you used.
     If you estimate potential costs or burdens, explain how 
you arrived at your estimate in sufficient detail to allow for it to be 
reproduced.
     Provide specific examples to illustrate your concerns and 
suggest alternatives.

[[Page 11728]]

     Explain your views as clearly as possible, avoiding the 
use of profanity or personal threats.
     Make sure to submit your comments by the comment period 
deadline identified.

II. What is the background for the EPA's proposed actions?

    On June 2, 2010, the EPA revised the primary SO2 NAAQS, 
establishing a new 1-hour SO2 standard of 75 parts per 
billion (ppb). See 75 FR 35520 (June 2, 2010). Under the EPA's 
regulations at 40 CFR part 50, the 2010 1-hour SO2 NAAQS is 
met at a monitoring site when the 3-year average of the annual 99th 
percentile of 1-hour daily maximum concentrations is less than or equal 
to 75 ppb (based on the rounding convention in 40 CFR part 50, appendix 
T). See 40 CFR 50.17. Ambient air quality monitoring data for the 3-
year period must meet a data completeness requirement. A year meets 
data completeness requirements when all 4 quarters are complete, and a 
quarter is complete when at least 75 percent of the sampling days for 
each quarter have complete data. A sampling day has complete data if 75 
percent of the hourly concentration values, including state-flagged 
data affected by exceptional events which have been approved for 
exclusion by the Administrator, are reported.\1\
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    \1\ 40 CFR part 50, appendix T, section 3(b).
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    Upon promulgation of a new or revised NAAQS, the CAA requires the 
EPA to designate as nonattainment any area that does not meet (or that 
contributes to ambient air quality in a nearby area that does not meet) 
the NAAQS.\2\ At the time the EPA conducted the initial round of 
designations for the 2010 1-hour SO2 primary NAAQS,\3\ 
Billings contained an SO2 monitor (Coburn Road) which 
registered violations of the standard based on the three most recent 
years of complete, quality assured, and certified ambient air quality 
data. In a letter to the EPA, Montana Governor Brian Schweitzer 
requested that all 56 counties in Montana be designated as attainment 
or unclassifiable. The EPA responded to Montana's initial designations 
request in a February 6, 2013 letter in which the EPA disagreed with 
Montana's request to classify Yellowstone County (which includes 
Billings) as unclassifiable for the 2010 1-hour SO2 standard 
and presented the case that all of Yellowstone County should be 
designated as nonattainment. In an April 3, 2013 letter to the EPA, 
Montana reiterated its request that Yellowstone County be designated 
unclassifiable, but requested an alternative nonattainment area 
boundary consisting of only a small portion of Billings if the EPA 
determined that a nonattainment designation was appropriate. The EPA 
agreed with the State's technical rationale for reducing the 
nonattainment area to a small portion of Billings which included only 
one source of SO2: The PPL Corette Power Plant.\4\ The EPA 
found that Montana's technical analysis demonstrated that the PPL 
Corette plant was the key contributor to the 2010 SO2 NAAQS 
violations at the Coburn Road monitor. The EPA, therefore, designated 
the area recommended by Montana as nonattainment for the 2010 
SO2 NAAQS on August 5, 2013, (effective October 4, 2013) 
using 2009-2011 ambient air quality data, leaving the remaining portion 
of Billings and Yellowstone County undesignated and subject to future 
analysis and designation. See 78 FR 47191 (August 5, 2013). This 
nonattainment designation established an attainment date five years 
after the October 4, 2013, effective date for areas classified as 
nonattainment for the 2010 1-hour SO2 NAAQS.\5\ Therefore, 
the Billings SO2 nonattainment area's attainment date is 
October 4, 2018. The Montana Department of Environmental Quality (MDEQ) 
was also required to submit an attainment SIP to EPA within 18 months 
following the October 4, 2013 effective date of designation, or by 
April 6, 2015.\6\
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    \2\ CAA section 107(d)(1)(A)(i).
    \3\ The EPA finalized nonattainment designations for 29 areas of 
the U.S. that contained SO2 monitors violating the NAAQS 
on August 5, 2013 (78 FR 47191, 47205), and took no designation-
related action on the rest of the country. The EPA was placed under 
a binding schedule for designation of the remaining portions of the 
U.S. for the 2010 1-hour SO2 NAAQS on March 2, 2015. See, 
Sierra Club, et al. v. McCarthy, Case No. 13-cv-03953-SI (N.D. Cal., 
March 2, 2015).
    \4\ Montana's recommended alternative boundary, now the Billings 
2010 SO2 Nonattainment Area, can be found in the Billings 
Redesignation Request at 13.
    \5\ CAA section 192.
    \6\ CAA section 191.
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    On January 16, 2015, MDEQ submitted a request for the EPA to 
determine that the Billings SO2 nonattainment area has 
attained the 2010 SO2 NAAQS per the EPA's ``clean data 
policy'' (Billings 2010 SO2 Clean Data Request).\7\ The 
clean data policy represents the EPA's interpretation that certain 
planning-related requirements of part D of the Act, such as the 
attainment demonstration, reasonably available control measures (RACM), 
and reasonable further progress (RFP), are suspended for areas that are 
in fact attaining the NAAQS. The clean data policy will be explained 
further in Section IV of this proposed rulemaking. A determination of 
attainment, or clean data determination, does not constitute a formal 
redesignation to attainment. If EPA subsequently determines that an 
area is no longer attaining the standard, those requirements that were 
suspended by the clean data determination are once again due.
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    \7\ The Billings 2010 SO2 Clean Data Request is 
available in the docket for this action.
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    On April 10, 2015, James Parker of PPL Montana sent a letter to Ed 
Warner of MDEQ notifying him that the PPL Corette Plant was officially 
retired on March 18, 2015, and had consumed its last coal on March 3, 
2015. On May 13, 2015, Gordon Criswell of PPL Montana sent a letter to 
MDEQ requesting a revocation of the Montana Air Quality Permit (MAQP) 
#2953-00 and Title V Operating Permit #OP2953-08. On May 21, 2015, 
David Klemp of MDEQ sent a letter to Mr. Criswell informing him that 
MDEQ was revoking both permits, as PPL had requested, effective 
immediately.
    On December 14, 2015, the State submitted to the EPA a request for 
redesignation of the Billings 2010 SO2 nonattainment area to 
attainment and a SIP revision containing a maintenance plan for the 
area.

III. What are the criteria for redesignation?

    The CAA provides the requirements for redesignating a nonattainment 
area to attainment. Specifically, section 107(d)(3)(E) of the CAA 
allows for redesignation of a nonattainment area provided that: (1) The 
Administrator determines that the area has attained the applicable 
NAAQS; (2) the Administrator has fully approved the applicable 
implementation plan for the area under section 110(k); (3) the 
Administrator determines that the improvement in air quality is due to 
permanent and enforceable reductions in emissions resulting from 
implementation of the applicable SIP and applicable federal air 
pollutant control regulations and other permanent and enforceable 
reductions; (4) the Administrator has fully approved a maintenance plan 
for the area as meeting the requirements of section 175A; and (5) the 
state containing such area has met all requirements applicable to the 
area for purposes of redesignation under section 110 and part D of the 
CAA.
    On April 16, 1992, the EPA provided guidance on redesignation in 
the General Preamble for the Implementation of title I of the CAA 
Amendments of 1990 (57 FR 13498), and supplemented this guidance on

[[Page 11729]]

April 28, 1992 (57 FR 18070). The EPA has provided further guidance on 
processing redesignation requests in several guidance documents. For 
the purposes of this action, the EPA will be referencing two of these 
documents: (1) The September 4, 1992 Memorandum from John Calcagni 
titled ``Procedures for Processing Requests to Redesignate Areas to 
Attainment,'' (hereafter referred to as the ``Calcagni Memo''); and (2) 
The April 23, 2014 Memorandum from Stephen D. Page titled ``Guidance 
for 1-Hour SO2 Nonattainment Area SIP Submissions,'' 
(hereafter referred to as ``2010 SO2 NAA Guidance'').

IV. What is EPA's analysis of the request?

    EPA's evaluation of Montana's redesignation request and maintenance 
plan was based on consideration of the five redesignation criteria 
provided under CAA section 107(d)(3)(E).

Criteria (1)--The Billings SO2 Nonattainment Area Has Attained the 2010 
1-Hour SO2 NAAQS

    For redesignating a nonattainment area to attainment, the CAA 
requires the EPA to determine that the area has attained the applicable 
NAAQS (CAA section 107(d)(3)(E)(i)). The two primary methods for 
evaluating ambient air quality impacted by SO2 emissions are 
through dispersion modeling and air quality monitoring. For 
SO2, an area may in some circumstances be considered to be 
attaining the 2010 1-hour SO2 NAAQS if it meets the NAAQS as 
determined in accordance with 40 CFR 50.17 and Appendix T of part 50, 
based on three complete, consecutive calendar years of quality-assured 
air quality monitoring data. To attain the NAAQS based on monitoring, 
the 3-year average of the annual 99th percentile (fourth highest value) 
of 1-hour daily maximum concentrations measured at each monitor within 
an area must be less than or equal to 75 ppb. The data must be 
collected and quality-assured in accordance with 40 CFR part 58 and 
recorded in the EPA Air Quality System (AQS). The EPA's determination 
of attainment can be based on monitoring data alone, without the need 
for dispersion modeling analyses, if the air agency provides an 
analysis demonstrating that the monitor(s) for the affected area is 
located in the area of maximum ambient concentration of 
SO2.\8\
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    \8\ See 2010 SO2 NAA Guidance, at 62.
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    In this action, the EPA is determining that the Billings 
SO2 nonattainment area is attaining the 2010 1-hour 
SO2 NAAQS. The EPA reviewed SO2 monitoring data 
from the lone monitoring station inside the Billings SO2 
nonattainment area, the Coburn Road station. The Coburn Road monitor 
data have been quality-assured, are recorded in AQS, and indicate that 
the area is attaining the 2010 1-hour SO2 NAAQS. The fourth-
highest 1-hour SO2 values at the Coburn Road monitor for the 
3-year averages of these values (i.e., design values), are summarized 
in Table 1, below.

                                Table 1--Coburn Road Monitored SO2 Concentrations
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                                                                                                      2012-2014
                                                              2012          2013          2014      Design value
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Annual 99th Percentile..................................           70            48            93            70
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    As shown, the 3-year design value for 2012-2014 at the Coburn Road 
monitor meets the 2010 SO2 NAAQS. Further, the EPA expects 
the SO2 emissions at this monitor to decrease significantly 
following the shutdown of the PPL Corette facility. Since the facility 
last operated on March 3, 2015, the values at the Coburn Road monitor 
have not exceeded 19 ppb SO2. This trend is anticipated to 
be permanent, as the State indicated in its analysis that 
SO2 emissions have since 2010 consistently decreased to 
levels well below the NAAQS during times when PPL Corette was not 
operating.\9\
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    \9\ Billings Redesignation Request at 8-12.
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    As part of Montana's redesignation request, the State submitted 
information to support a showing that the Coburn Road monitor was sited 
in the area of maximum ambient SO2 concentration within the 
Billings SO2 nonattainment area in accordance with the 2010 
SO2 NAA Guidance. This showing included data from historical 
monitors near the Coburn Road monitor which consistently showed lower 
values than those at Coburn Road. The EPA has reviewed Montana's 
information regarding this showing, but finds that it is no longer 
applicable to the current SO2 emissions mix in the Billings 
SO2 nonattainment area because the sole SO2 
source in the area (PPL Corette) has shut down. The EPA does not find 
it necessary to require the State to conduct new modeling or 
exploratory monitoring as recommended by EPA's May 2013 Draft 
Monitoring Technical Assistance Document (TAD)\10\ to determine the 
point of maximum concentration in the nonattainment area because the 
source of concern in the area has shut down and been dismantled, 
resulting in SO2 concentrations well below the standard.
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    \10\ On page 58 of the 2010 SO2 NAA Guidance, EPA 
recommends that air agencies follow the Draft ``SO2 NAAQS 
Designations Source-Oriented Monitoring Technical Assistance 
Document,'' Office of Air Quality Planning and Standards, Air 
Quality Assessment Division. Although this 2010 SO2 NAA 
Guidance references the Draft monitoring TAD with regard to 
reviewing clean data determinations, the EPA also considers the TAD 
recommendations applicable to attainment demonstrations.
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    In this action, the EPA is proposing to determine that the Billings 
SO2 nonattainment area is attaining the 2010 1-hour 
SO2 NAAQS, and therefore meets the requirements of CAA 
section 107(d)(3)(E)(i). If the 3-year design value exceeds the NAAQS 
prior to the EPA taking action in response to the State's request, the 
EPA will not take final action to approve the redesignation 
request.\11\ As discussed in more detail below, Montana has committed 
to continue monitoring in this area in accordance with 40 CFR part 58.
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    \11\ See 2010 SO2 NAA Guidance, at 56.
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    As noted, Montana separately submitted to the EPA a request for a 
determination of clean data for the Billings SO2 
nonattainment area on January 16, 2015. The clean data policy 
represents the EPA's interpretation that certain requirements of part D 
of title I of the Act are suspended for areas that are currently 
attaining the NAAQS. The requirements that are suspended in an area 
attaining the standard include the requirements to submit an 
``attainment SIP'' that provides for: Attainment of the NAAQS; 
implementation of all RACM; RFP; and implementation of contingency 
measures for failure to meet deadlines for RFP and attainment. In the 
2010 SO2 NAA guidance, the EPA

[[Page 11730]]

explained our intention to apply the EPA's clean data policy to the 
2010 SO2 primary NAAQS.\12\ Because EPA's analysis in 
determining whether an area has attained under the clean data policy is 
the same as its analysis under the first redesignation criterion, EPA 
is also here proposing that the Billings SO2 nonattainment 
area qualifies for a determination of attainment under the clean data 
policy, based on the 2012-2014 monitoring data from the Coburn Road 
monitor. In the event that EPA does not finalize the proposed 
redesignation, EPA may choose to separately finalize the clean data 
determination, thereby suspending Montana's obligation to submit the 
attainment planning-related requirements for the area for as long as 
the area continues to attain the standard. As with its analysis that 
the area has attained under the redesignation requirements, for 
purposes of the clean data determination, the EPA is not requiring 
Montana to demonstrate that the monitor is located in the area of 
maximum concentration in accordance with the 2010 SO2 NAA 
Guidance due to the unique circumstances associated with the PPL 
Corette shutdown.\13\
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    \12\ Id. at 52.
    \13\ Id. at 58.
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Criteria (2)--Montana Has a Fully Approved SIP Under Section 110(k); 
and Criteria (5)--Montana Has Met All Applicable Requirements Under 
Section 110 and Part D of Title I of the CAA

    For redesignating a nonattainment area to attainment under a NAAQS, 
the CAA requires the EPA to determine that the state has met all 
applicable requirements for that NAAQS under section 110 and part D of 
title I of the CAA (CAA section 107(d)(3)(E)(v)) and that the state has 
a fully approved SIP under section 110(k) for that NAAQS for the area 
(CAA section 107(d)(3)(E)(ii)). The EPA proposes to find that Montana 
has met all applicable SIP requirements for the Billings SO2 
nonattainment area for the 2010 SO2 NAAQS under section 110 
of the CAA (general SIP requirements) for purposes of redesignation. 
Additionally, the EPA proposes to find that the Montana SIP satisfies 
the criterion that it meets applicable SIP requirements for purposes of 
redesignation under part D of title I of the CAA in accordance with 
section 107(d)(3)(E)(v). Further, the EPA proposes to determine that 
the SIP is fully approved with respect to all requirements applicable 
for the 2010 SO2 NAAQS for purposes of redesignation in 
accordance with section 107(d)(3)(E)(ii). In making these 
determinations, the EPA ascertained which requirements are applicable 
to the Billings SO2 nonattainment area and, if applicable, 
that they are fully approved under section 110(k).
a. The Billings SO2 Nonattainment Area Has Met All 
Applicable Requirements Under Section 110 and Part D of the CAA
    General SIP requirements. General SIP elements and requirements are 
delineated in section 110(a)(2) of title I, part A of the CAA. These 
requirements include, but are not limited to, the following: Submittal 
of a SIP that has been adopted by the state after reasonable public 
notice and hearing; provisions for establishment and operation of 
appropriate procedures needed to monitor ambient air quality; 
implementation of a source permit program; provisions for the 
implementation of part C requirements (Prevention of Significant 
Deterioration (PSD)) and provisions for the implementation of part D 
requirements (New Source Review (NSR) permit programs); provisions for 
air pollution modeling; and provisions for public and local agency 
participation in planning and emission control rule development.
    Section 110(a)(2)(D) requires that SIPs contain certain measures to 
prevent sources in a state from significantly contributing to air 
quality problems in another state. To implement this provision, the EPA 
has required certain states to establish programs to address the 
interstate transport of air pollutants. The section 110(a)(2)(D) 
requirements for a state are not linked with a particular nonattainment 
area's designation and classification in that state. The EPA believes 
that the requirements linked with a particular nonattainment area's 
designation and classifications are the relevant measures to evaluate 
in reviewing a redesignation request. The transport SIP submittal 
requirements, where applicable, continue to apply to a state regardless 
of the designation of any one particular area in the state. Thus, the 
EPA does not believe that the CAA's interstate transport requirements 
should be construed to be applicable requirements for purposes of 
redesignation.
    In addition, the EPA believes other section 110 elements that are 
neither connected with nonattainment plan submissions nor linked with 
an area's attainment status are applicable requirements for purposes of 
redesignation. The area will still be subject to these requirements 
after the area is redesignated. The section 110 and part D requirements 
which are linked with a particular area's designation and 
classification are the relevant measures to evaluate in reviewing a 
redesignation request. This approach is consistent with the EPA's 
existing policy on applicability (i.e., for redesignations) of 
conformity and oxygenated fuels requirements, as well as with section 
184 ozone transport requirements. See Reading, Pennsylvania, proposed 
and final rulemakings (61 FR 53174-53176, October 10, 1996), (62 FR 
24826, May 7, 2008); Cleveland-Akron-Loraine, Ohio, final rulemaking 
(61 FR 20458, May 7,1996); and Tampa, Florida, final rulemaking at (60 
FR 62748, December 7, 1995). See also the discussion on this issue in 
the Cincinnati, Ohio, redesignation (65 FR 37890, June 19, 2000), and 
in the Pittsburgh, Pennsylvania, redesignation (66 FR 50399, October 
19, 2001).
    Title I, Part D, applicable SIP requirements. Section 172(c) of the 
CAA sets forth the basic requirements of attainment plans for 
nonattainment areas that are required to submit them pursuant to 
section 172(b). Subpart 5 of part D, which includes section 191 and 192 
of the CAA, establishes requirements for SO2, nitrogen 
dioxide and lead nonattainment areas. A thorough discussion of the 
requirements contained in sections 172(c) can be found in the General 
Preamble for Implementation of Title I (57 FR 13498).
    Subpart 5 Section 172 Requirements. Section 172(c)(1) requires the 
plans for all nonattainment areas to provide for the implementation of 
all RACM as expeditiously as practicable and to provide for attainment 
of the NAAQS. The EPA interprets this requirement to impose a duty on 
all nonattainment areas to consider all available control measures and 
to adopt and implement such measures as are reasonably available for 
implementation in each area as components of the area's attainment 
demonstration. Under section 172, states with nonattainment areas must 
submit plans providing for timely attainment and meeting a variety of 
other requirements.
    The EPA's longstanding interpretation of the nonattainment planning 
requirements of section 172 is that once an area is attaining the 
NAAQS, those requirements are not ``applicable'' for purposes of CAA 
section 107(d)(3)(E)(ii) and therefore need not be approved into the 
SIP before the EPA can redesignate the area. In the 1992 General 
Preamble for Implementation of Title I, the EPA set forth its 
interpretation of applicable requirements for purposes of evaluating 
redesignation requests when an area is attaining a standard. See 57 FR 
13498,

[[Page 11731]]

13564 (April 16, 1992). The EPA noted that the requirements for RFP and 
other measures designed to provide for attainment do not apply in 
evaluating redesignation requests because those nonattainment planning 
requirements ``have no meaning'' for an area that has already attained 
the standard. Id. This interpretation was also set forth in the 
Calcagni Memo. The EPA's understanding of section 172 also forms the 
basis of its Clean Data Policy, which was articulated with regard to 
SO2 in the 2010 SO2 NAA Guidance, and suspends a 
state's obligation to submit most of the attainment planning 
requirements that would otherwise apply, including an attainment 
demonstration and planning SIPs to provide for RFP, RACM, and 
contingency measures under section 172(c)(9). Courts have upheld the 
EPA's interpretation of section 172(c)(1) for ``reasonably available'' 
control measures and control technology as meaning only those controls 
that advance attainment, which precludes the need to require additional 
measures where an area is already attaining. NRDC v. EPA, 571 F.3d 
1245, 1252 (D.C. Cir. 2009); Sierra Club v. EPA, 294 F.3d 155, 162 
(D.C. Cir. 2002); Sierra Club v. EPA, 314 F.3d 735, 744 (5th Cir. 
2002); Sierra Club v. EPA, 375 F.3d 537 (7th Cir. 2004). But see Sierra 
Club v. EPA, 793 F.3d 656 (6th Cir. 2015).
    Therefore, because attainment has been reached in the Billings 
SO2 nonattainment area, no additional measures are needed to 
provide for attainment, and section 172(c)(1) requirements for an 
attainment demonstration and RACM are not part of the ``applicable 
implementation plan'' required to have been approved prior to 
redesignation per CAA section 107(d)(3)(E)(ii). The other section 172 
requirements that are designed to help an area achieve attainment--the 
section 172(c)(2) requirement that nonattainment plans contain 
provisions promoting reasonable further progress, the requirement to 
submit the section 172(c)(9) contingency measures, and the section 
172(c)(6) requirement for the SIP to contain control measures necessary 
to provide for attainment of the NAAQS--are also not required to be 
approved as part of the ``applicable implementation plan'' for purposes 
of satisfying CAA section 107(d)(3)(E)(ii).
    Section 172(c)(3) requires submission and approval of a 
comprehensive, accurate, and current inventory of actual emissions. The 
requirement for an emission inventory can be satisfied by meeting the 
inventory requirements of the maintenance plan.\14\ MDEQ submitted an 
emissions inventory as part of the maintenance plan for the Billings 
SO2 nonattainment area, and this inventory will be discussed 
further in the maintenance plan portion of this proposed action.
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    \14\ Calcagni Memo at 6.
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    Section 172(c)(4) requires the identification and quantification of 
allowable emissions for major new and modified stationary sources to be 
allowed in an area, and section 172(c)(5) requires source permits for 
the construction and operation of new and modified major stationary 
sources anywhere in the nonattainment area. The EPA has determined 
that, since PSD requirements will apply after redesignation, areas 
being redesignated need not comply with the requirement that a NSR 
program be approved prior to redesignation, provided that the area 
demonstrates maintenance of the NAAQS without part D NSR. A more 
detailed rationale for this view is described in a memorandum from Mary 
Nichols, Assistant Administrator for Air and Radiation, dated October 
14, 1994, entitled ``Part D New Source Review Requirements for Areas 
Requesting Redesignation to Attainment.'' MDEQ has demonstrated that 
the Billings SO2 nonattainment area will be able to maintain 
the NAAQS without part D NSR in effect, and therefore Montana need not 
have fully approved part D NSR programs prior to approval of the 
redesignation request. Montana's PSD program will become effective in 
the Billings SO2 nonattainment area upon redesignation to 
attainment.
    Section 172(c)(7) requires the SIP to meet the applicable 
provisions of section 110(a)(2). As noted above, the EPA believes the 
Montana SIP meets the requirements of section 110(a)(2) applicable for 
purposes of redesignation.
    Section 176 Conformity Requirements. Section 176(c) of the CAA 
requires states to establish criteria and procedures to ensure that 
federally supported or funded projects conform to the air quality 
planning goals in the applicable SIP. The requirement to determine 
conformity applies to transportation plans, programs, and projects that 
are developed, funded, or approved under title 23 of the United States 
Code (U.S.C.) and the Federal Transit Act (transportation conformity) 
as well as to all other federally supported or funded projects (general 
conformity). State transportation conformity SIP revisions must be 
consistent with federal conformity regulations relating to 
consultation, enforcement, and enforceability that the EPA promulgated 
pursuant to its authority under the CAA.
    Montana has an approved general conformity SIP for the Billings 
area. See 67 FR 62392 (October 7, 2002). Moreover, the EPA interprets 
the conformity SIP requirements as not applying for purposes of 
evaluating a redesignation request under section 107(d) because, like 
other requirements listed above, state conformity rules are still 
required after redesignation and federal conformity rules apply where 
state rules have not been approved. See Wall v. EPA, 265 F.3d 426 (6th 
Cir. 2001) (upholding this interpretation); see also 60 FR 62748 
(December 7, 1995) (redesignation of Tampa, Florida).
    For these reasons, the EPA proposes to find that Montana has 
satisfied all applicable requirements for purposes of redesignation of 
the Billings SO2 nonattainment area under section 110 and 
part D of title I of the CAA.
b. The Billings SO2 Nonattainment Area Has a Fully Approved 
Applicable SIP Under Section 110(k) of the CAA
    The EPA has fully approved the applicable Montana SIP for the 
Billings Area under section 110(k) of the CAA for all requirements 
applicable for purposes of redesignation. As indicated above, the EPA 
believes that the section 110 elements that are neither connected with 
nonattainment plan submissions nor linked to an area's nonattainment 
status are not applicable requirements for purposes of redesignation. 
The EPA has approved all part D requirements applicable under the 2010 
SO2 NAAQS, as identified above, for purposes of this 
redesignation.

Criteria (3)--The Air Quality Improvement in the Billings SO2 
Nonattainment Area Is Due to Permanent and Enforceable Reductions in 
Emissions

    For redesignating a nonattainment area to attainment, the CAA 
requires the EPA to determine that the air quality improvement in the 
area is due to permanent and enforceable reductions in emissions 
resulting from implementation of the SIP, applicable federal air 
pollution control regulations, and other permanent and enforceable 
reductions (CAA section 107(d)(3)(E)(iii)). The EPA proposes to find 
that Montana has demonstrated that the observed air quality improvement 
in the Billings SO2 nonattainment area is due to permanent 
and enforceable reductions in emissions. Specifically, the EPA 
considers the shutdown of the PPL Corette Plant, identified as the key

[[Page 11732]]

contributor to the SO2 NAAQS violations at the Coburn Road 
monitor,\15\ to be both permanent and enforceable. The EPA notes that 
the Corette facility was still operating (though not continuously) \16\ 
during the 2012-2014 period during which the 2010 SO2 NAAQS 
was attained in the Billings nonattainment area. Given the well-
established correlation of much lower SO2 emissions at the 
Coburn Road monitor during periods when Corette has not operated, EPA 
anticipates that the SO2 NAAQS will only attain by a greater 
margin following the facility's shutdown. As stated in the Calcagni 
Memo, ``Emission reductions from source shutdowns can be considered 
permanent and enforceable to the extent that those shutdowns have been 
reflected in the SIP and all applicable permits have been modified 
accordingly.'' \17\ MDEQ revoked PPL's Title V (operating) and NSR 
permits for the Corette facility.\18\ Further, the PPL Corette facility 
has been dismantled, making its future operation impossible and thus 
displaying the permanence of the emissions reductions in the 
nonattainment area. Any new sources that may come into being within the 
area would be required to demonstrate that their new SO2 
emissions would not interfere with attainment and maintenance of the 
2010 SO2 NAAQS. Therefore, the EPA is proposing to find that 
the air quality improvement in the Billings SO2 
nonattainment area is due to permanent and enforceable reductions in 
emissions.
---------------------------------------------------------------------------

    \15\ See EPA's final Technical Support Document (TSD) for the 
Billings SO2 Nonattainment Area, in the docket for EPA's 
initial round of 2010 SO2 designations at EPA-HQ-OAR-
2012-0233-0318.
    \16\ The Corette facility did not operate for several 
consecutive months in both 2012 and 2014.
    \17\ Calcagni Memo at 10.
    \18\ Permit revocation letters are included in the docket for 
this action.
---------------------------------------------------------------------------

Criteria (4)--The Billings SO2 Nonattainment Area Has a Fully Approved 
Maintenance Plan Pursuant to Section 175A of the CAA

    To redesignate a nonattainment area to attainment, the CAA requires 
the EPA to determine that the area has a fully approved maintenance 
plan pursuant to section 175A of the CAA (CAA section 
107(d)(3)(E)(iv)). In conjunction with its request to redesignate the 
Billings SO2 nonattainment area to attainment for the 2010 
1-hour SO2 NAAQS, MDEQ submitted a SIP revision to provide 
for the maintenance of the 2010 1-hour SO2 NAAQS for at 
least 10 years after the effective date of redesignation to attainment. 
The EPA is proposing to find that this maintenance plan for the area 
meets the requirements for approval under section 175A of the CAA.
a. What is required in a maintenance plan?
    CAA section 175A sets forth the elements of a maintenance plan for 
areas seeking redesignation from nonattainment to attainment. Under 
section 175A, the plan must demonstrate continued attainment of the 
applicable NAAQS for at least 10 years after the Administrator approves 
a redesignation to attainment. Eight years after the redesignation, the 
state must submit a revised maintenance plan demonstrating that 
attainment will continue to be maintained for the 10 years following 
the initial 10-year period. To address the possibility of future NAAQS 
violations, the maintenance plan must contain contingency measures as 
the EPA deems necessary to assure prompt correction of any future 2010 
1-hour SO2 violations. The Calcagni Memo provides further 
guidance on the content of a maintenance plan, explaining that a 
maintenance plan should address five requirements: The attainment 
emissions inventory, maintenance demonstration, monitoring, 
verification of continued attainment, and a contingency plan. As is 
discussed more fully below, the EPA is proposing to determine that 
Montana's maintenance plan includes all the necessary components and is 
thus proposing to approve it as a revision to the Montana SIP.
b. Attainment Emissions Inventory
    As part of a state's maintenance plan for a 2010 SO2 
nonattainment area, the air agency should develop an attainment 
inventory to identify the level of emissions in the affected area which 
is sufficient to attain and maintain the SO2 NAAQS.\19\ 
Montana selected 2014 as the base year (i.e., attainment emissions 
inventory year) for developing an emissions inventory for 
SO2 in the nonattainment area through 2024. In 2014, the 
final full calendar year in which PPL Corette was permitted to operate 
prior to the March 2015 shutdown, the facility emitted 1,433 tons of 
SO2.\20\
---------------------------------------------------------------------------

    \19\ See 2010 SO2 NAA Guidance, at 66.
    \20\ PPL Corette did not operate for nearly five months during 
2014.
---------------------------------------------------------------------------

    In 2014, the Coburn Road monitor reported exceedances of the 2010 
SO2 NAAQS on eight different days, giving the monitor a 99th 
percentile (4th highest 1-hour daily maximum concentration) of 93 ppb. 
Regardless, the 2014 emissions level of 1,433 tons of SO2 is 
the lowest level of any year in the attaining 2012 to 2014 period, 
making it the most conservative option for the purposes of ensuring 
future maintenance of the NAAQS (see Table 2). The EPA has therefore 
determined that this is a level sufficient to attain the 2010 1-hour 
SO2 NAAQS, and is proposing to find that the attainment 
inventory submitted as part of Montana's maintenance plan meets the 
``Attainment Emissions Inventory'' requirement.

      Table 2--Annual SO2 Emissions in Billings Nonattainment Area
------------------------------------------------------------------------
             Year                   2012          2013          2014
------------------------------------------------------------------------
Annual SO2 Emissions (tons)...        1,884         2,247         1,433
------------------------------------------------------------------------

    The EPA notes that the permanent shutdown of PPL Corette has left 
the Billings SO2 nonattainment area with no sources of 
SO2, and the maintenance plan for the area contains an 
emissions inventory (in the ``Maintenance Demonstration'' section) 
which projects a level of zero SO2 emissions in the 
nonattainment area for each year from 2016 through 2024. The EPA 
therefore does not anticipate emissions activity in the 2010 
SO2 nonattainment area that will approach 1,433 tons of 
SO2.
c. Maintenance Demonstration
    An air agency may generally demonstrate maintenance of the NAAQS by 
either showing that future emissions of SO2 will not exceed 
the level of the attainment inventory, or by modeling to show that the 
future mix of sources and emission rates will not cause a violation of 
the NAAQS.\21\ Montana has demonstrated maintenance by showing that 
future year emissions

[[Page 11733]]

(through ``out year'' 2024) of SO2 in the maintenance area 
are expected to remain at zero following the PPL Corette shutdown. The 
State's projected emissions inventory \22\ has been reproduced as Table 
3, below:
---------------------------------------------------------------------------

    \21\ See 2010 SO2 NAA Guidance at 67.
    \22\ The State's emissions inventory projection is listed as 
Figure 3.2 in the Billings SO2 Redesignation Request, at 
23.

                                       Table 3--Billings SO2 Nonattainment Area SO2 Projected Emissions Inventory
--------------------------------------------------------------------------------------------------------------------------------------------------------
                              Year                                 2014    2015    2016    2017    2018    2019    2020    2021    2022    2023    2024
--------------------------------------------------------------------------------------------------------------------------------------------------------
Annual SO2 Emissions (tons).....................................   1433     460       0       0       0       0       0       0       0       0       0
--------------------------------------------------------------------------------------------------------------------------------------------------------

    The EPA considers the inventory projection of zero emissions 
sufficient to attain and maintain the SO2 NAAQS. The EPA is 
therefore also proposing to find that the State's ``Maintenance 
Demonstration'' requirement is met based on this projected emissions 
inventory.
d. Monitoring Network
    Montana has committed to continue operating the Coburn Road monitor 
at its current location in the Billings SO2 nonattainment 
area. The State also committed to operating the monitor in accordance 
with the requirements of 40 CFR part 58, and have thus addressed the 
requirement for monitoring. The EPA approved Montana's monitoring plan 
on January 13, 2015. The EPA is proposing to find that Montana's 
maintenance plan meets the ``Monitoring Network'' requirement.
e. Verification of Continued Attainment
    Each air agency should ensure that it has the legal authority to 
implement and enforce all measures necessary to attain and maintain the 
2010 SO2 NAAQS. The air agency's submittal should indicate 
how it will track the progress of the maintenance plan for the area 
either through air quality monitoring or modeling.\23\
---------------------------------------------------------------------------

    \23\ 2010 SO2 Guidance at 67-68.
---------------------------------------------------------------------------

    The State of Montana has the legal authority to enforce and 
implement the maintenance plan for the Billings 2010 SO2 
nonattainment area. This includes the authority to adopt, implement, 
and enforce any subsequent emissions control contingency measures 
determined to be necessary to correct future SO2 attainment 
problems.\24\ As noted, the State will track the progress of the 
maintenance plan by continuing to operate the Coburn Road monitor. For 
these reasons, the EPA is proposing to find that Montana's maintenance 
plan meets the ``Verification of Continued Attainment'' requirement.
---------------------------------------------------------------------------

    \24\ EPA last determined that Montana's SIP was sufficient to 
meet the requirements of 110(a)(2)(E)(i) of the CAA on July 30, 2013 
(78 FR 45864).
---------------------------------------------------------------------------

f. Contingency Measures in the Maintenance Plan
    Section 175A of the CAA requires that a maintenance plan include 
such contingency measures as the EPA deems necessary to assure that the 
state will promptly correct a violation of the NAAQS that occurs after 
redesignation. The maintenance plan should identify the contingency 
measures to be adopted, a schedule and procedure for adoption and 
implementation, and a time limit for action by the state. A state 
should also identify specific indicators to be used to determine when 
the contingency measures need to be implemented. The maintenance plan 
must also include a requirement that a state will implement all 
measures with respect to control of the pollutant that were contained 
in the SIP before redesignation of the area to attainment in accordance 
with section 175A(d).
    The contingency plan includes a triggering mechanism to determine 
when contingency measures are needed and a process of developing and 
implementing appropriate control measures. The State listed two types 
of triggers of its contingency plan. The first, a ``warning level 
response,'' will be triggered by a 99th percentile of 1-hour daily 
maximum SO2 values greater than 65 ppb in a single calendar 
year. The second, an ``action level response,'' is triggered when such 
a value exceeds 70 ppb in a single calendar year.
    If the warning level response is triggered, the State must conduct 
a study to determine whether the SO2 values near the level 
of the 2010 SO2 NAAQS (75 ppb) are the result of a trend, 
and if so, what control measures are necessary to reverse that trend. 
The implementation of the control measures stemming from a warning 
level response will take place no later than 18 months after the end of 
the calendar year in which a determination requiring control measures 
was made. If the action level response is triggered and is not found to 
be due to an exceptional event as defined at 40 CFR part 50.1(j), the 
State will work with the entity or entities believed to be responsible 
for the high levels of SO2 to evaluate control measures 
necessary to ensure future attainment of the NAAQS. Montana must submit 
to the EPA its analysis demonstrating that the proposed control 
measures are adequate to ensure continued maintenance of the 2010 
SO2 NAAQS in the area or to return the area to attainment of 
the NAAQS. The implementation of the control measures stemming from an 
action level response will take place no later than 18 months after the 
end of the calendar year in which the action level response was 
prompted. Montana noted that, since the only source in the 
nonattainment area has shut down, it is not possible at this time to 
develop specific contingency measures until the cause of the elevated 
concentrations is known. The EPA is proposing to find that Montana's 
maintenance plan meets the ``Contingency Measures'' requirement.
    The EPA has concluded that the maintenance plan adequately 
addresses the five basic components of a maintenance plan: The 
attainment emissions inventory, maintenance demonstration, monitoring, 
verification of continued attainment, and a contingency plan. 
Therefore, the EPA proposes to find that the maintenance plan SIP 
revision submitted by Montana for the Billings 2010 SO2 
nonattainment area meets the requirements of section 175A of the CAA 
and is approvable.

V. What are the actions the EPA is proposing to take?

    The EPA is proposing to take the following four separate but 
related actions: (1) Determine that the Billings SO2 
nonattainment area is attaining the 2010 1-hour SO2 NAAQS; 
(2) Approve Montana's plan for maintaining the 2010 1-hour 
SO2 NAAQS (maintenance plan); (3) Redesignate the Billings 
SO2 nonattainment area to attainment for the 2010 1-hour 
SO2 NAAQS; and (4) determine that the Billings 
SO2 nonattainment area has clean monitoring data. Section IV 
of this notice provides a discussion of each of these proposed actions.
    The EPA proposes to determine that the Billings SO2 
nonattainment area has attained the 2010 1-hour SO2 standard 
by the October 4, 2018, required attainment date. This determination is 
based on complete, quality-assured, and

[[Page 11734]]

certified monitoring data for the 2012-2014 monitoring period. The EPA 
is also proposing to approve the maintenance plan under the 2010 NAAQS 
for the Billings SO2 nonattainment area into the Montana SIP 
(under CAA section 175A). The maintenance plan demonstrates that the 
area will continue to maintain the 2010 1-hour SO2 NAAQS, 
and includes a process to develop contingency measures to remedy any 
future violations of the 2010 1-hour SO2 NAAQS and 
procedures for evaluation of potential violations.
    Additionally, the EPA is proposing to determine that the Billings 
SO2 nonattainment area has met the criteria under CAA 
section 107(d)(3)(E) for redesignation from nonattainment to attainment 
for the 2010 1-hour SO2 NAAQS. On this basis, the EPA is 
proposing to approve Montana's redesignation request for the area. 
Final approval of Montana's redesignation request would change the 
legal designation of the portion of Yellowstone County designated 
nonattainment at 40 CFR part 81.327 to attainment for the 2010 1-hour 
SO2 NAAQS.
    The EPA is also proposing to determine that the Billings 
SO2 nonattainment area has attaining monitoring data for the 
2010 SO2 primary NAAQS based on the most recent complete 
three-year period (2012-2014) design value period that meets the clean 
data policy. As noted elsewhere, in the event that EPA does not 
finalize the proposed redesignation, EPA may choose to separately 
finalize the clean data determination, thereby suspending the 
attainment planning-related requirements for the area.
    In this action, the EPA is not proposing to take any action on the 
Billings/Laurel SO2 area that was the subject of a SIP Call 
(67 FR 22168, May 2, 2002) and for which EPA promulgated a FIP (77 FR 
21418, April 21, 2008) under the prior 24-hour SO2 primary 
NAAQS and the still-current SO2 secondary NAAQS. EPA is also 
not proposing any action to revoke the prior (1971) SO2 
primary NAAQS in either the 2010 Billings SO2 nonattainment 
area or the larger Billings/Laurel area addressed by the May 2, 2002 
SIP Call.

VI. 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 the requirements of 1 CFR 51.5, the EPA is proposing to 
incorporate by reference the Billings SO2 Redesignation and 
Maintenance Plan for action which are identified within this notice of 
proposed rulemaking. The EPA has made, and will continue to make, these 
documents generally available electronically through 
www.regulations.gov and/or in hard copy at the appropriate EPA office 
(see the ADDRESSES section of this rule's preamble for more 
information).

VII. Statutory and Executive Order Reviews

    Under the CAA, redesignation of an area to attainment and the 
accompanying approval of a maintenance plan under section 107(d)(3)(E) 
are actions that affect the status of a geographical area and do not 
impose any additional regulatory requirements on sources beyond those 
imposed by state law. A redesignation to attainment does not in and of 
itself create any new requirements, but rather results in the 
applicability of requirements contained in the CAA for areas that have 
been redesignated to attainment. Moreover, the Administrator is 
required to approve a SIP submission that complies with the provisions 
of the Act and applicable Federal regulations. See 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, these proposed actions merely propose to approve state law 
as meeting Federal requirements and do not impose additional 
requirements beyond those imposed by state law. For this reason, these 
proposed actions:
     Are not significant regulatory actions 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);
     Do not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Are 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.);
     Do 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);
     Do not have federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Are not economically significant regulatory actions based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     Are not significant regulatory actions subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Are 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
     Do 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 does not 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 oxides, Volatile organic compounds.

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

    Dated: February 23, 2016.
Richard D. Buhl,
Acting Regional Administrator, Region 8.
[FR Doc. 2016-04900 Filed 3-4-16; 8:45 am]
 BILLING CODE 6560-50-P



                                                                             Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules                                            11727

                                                    submitting comments. Once submitted,                      Dated: February 22, 2016.                           contents located outside of the primary
                                                    comments cannot be edited or removed                    Robert A. Kaplan,                                     submission (i.e., on the web, cloud, or
                                                    from Regulations.gov. For either manner                 Acting Regional Administrator, Region 5.              other file sharing system). For
                                                    of submission, EPA may publish any                      [FR Doc. 2016–04877 Filed 3–4–16; 8:45 am]            additional submission methods, the full
                                                    comment received to its public docket.                  BILLING CODE 6560–50–P
                                                                                                                                                                  EPA public comment policy,
                                                    Do not submit electronically any                                                                              information about CBI or multimedia
                                                    information you consider to be                                                                                submissions, and general guidance on
                                                    Confidential Business Information (CBI)                 ENVIRONMENTAL PROTECTION                              making effective comments, please visit
                                                    or other information whose disclosure is                AGENCY                                                http://www2.epa.gov/dockets/
                                                    restricted by statute. Multimedia                                                                             commenting-epa-dockets.
                                                                                                            40 CFR Part 52                                        FOR FURTHER INFORMATION CONTACT:
                                                    submissions (audio, video, etc.) must be
                                                    accompanied by a written comment.                       [EPA–R08–OAR–2015–0205; FRL–9943–27–                  Adam Clark, Air Program, U.S.
                                                    The written comment is considered the                   Region 8]                                             Environmental Protection Agency,
                                                    official comment and should include                                                                           Region 8, Mailcode 8P–AR, 1595
                                                                                                            Designation of Areas for Air Quality                  Wynkoop, Denver, Colorado 80202–
                                                    discussion of all points you wish to
                                                                                                            Planning Purposes; Redesignation                      1129, (303) 312–7104, clark.adam@
                                                    make. EPA will generally not consider
                                                                                                            Request and Associated Maintenance                    epa.gov.
                                                    comments or comment contents located                    Plan for Billings, MT 2010 SO2
                                                    outside of the primary submission (i.e.                                                                       SUPPLEMENTARY INFORMATION:
                                                                                                            Nonattainment Area
                                                    on the web, cloud, or other file sharing                                                                      I. General Information
                                                    system). For additional submission                      AGENCY:  Environmental Protection
                                                    methods, please contact the person                      Agency (EPA).                                         What should I consider as I prepare my
                                                    identified in the ‘‘For Further                         ACTION: Proposed rule.                                comments for EPA?
                                                    Information Contact’’ section. For the                                                                           1. Submitting Confidential Business
                                                    full EPA public comment policy,                         SUMMARY:   On December 14, 2015, the
                                                                                                                                                                  Information (CBI). Do not submit CBI to
                                                    information about CBI or multimedia                     State of Montana submitted a request for
                                                                                                                                                                  the EPA through www.regulations.gov or
                                                    submissions, and general guidance on                    the Environmental Protection Agency
                                                                                                                                                                  email. Clearly mark the part or all of the
                                                                                                            (EPA) to redesignate the Billings,
                                                    making effective comments, please visit                                                                       information that you claim to be CBI.
                                                                                                            Montana, 2010 sulfur dioxide (SO2)
                                                    http://www2.epa.gov/dockets/                                                                                  For CBI information in a disk or CD
                                                                                                            National Ambient Air Quality Standard
                                                    commenting-epa-dockets.                                                                                       ROM that you mail to the EPA, mark the
                                                                                                            (NAAQS) nonattainment area to
                                                                                                                                                                  outside of the disk or CD ROM as CBI
                                                    FOR FURTHER INFORMATION CONTACT:                        attainment and to approve a State
                                                                                                                                                                  and then identify electronically within
                                                    Edward Doty, Air Programs Branch                        Implementation Plan (SIP) revision
                                                                                                                                                                  the disk or CD ROM the specific
                                                    (AR–18J), Environmental Protection                      containing a maintenance plan for the
                                                                                                                                                                  information that is claimed as CBI. In
                                                    Agency, 77 West Jackson Boulevard,                      area. In response to this submittal, the
                                                                                                                                                                  addition to one complete version of the
                                                    Chicago, Illinois 60604, (312) 886–6057,                EPA is proposing to take the following
                                                                                                                                                                  comment that includes information
                                                    Doty.Edward@epa.gov.                                    actions: Determine that the Billings SO2
                                                                                                                                                                  claimed as CBI, a copy of the comment
                                                                                                            nonattainment area is attaining the 2010
                                                    SUPPLEMENTARY INFORMATION:        In the                                                                      that does not contain the information
                                                                                                            SO2 primary NAAQS; approve
                                                    Final Rules section of this Federal                                                                           claimed as CBI must be submitted for
                                                                                                            Montana’s plan for maintaining
                                                    Register, EPA is approving IEPA’s SIP                                                                         inclusion in the public docket.
                                                                                                            attainment of the 2010 SO2 primary
                                                    revision as a direct final rule without                                                                       Information so marked will not be
                                                                                                            NAAQS in the area; and redesignate the
                                                    prior proposal because EPA views this                                                                         disclosed except in accordance with
                                                                                                            Billings SO2 nonattainment area to
                                                    as a noncontroversial submittal and                                                                           procedures set forth in 40 CFR part 2.
                                                                                                            attainment for the 2010 SO2 primary
                                                    anticipates no adverse comments. A                                                                               2. Tips for Preparing Your Comments.
                                                                                                            NAAQS.
                                                                                                                                                                  When submitting comments, remember
                                                    detailed rationale for the approval is set
                                                                                                            DATES:  Comments must be received on                  to:
                                                    forth in the direct final rule. If no                   or before April 6, 2016.                                 • Identify the rulemaking by docket
                                                    adverse comments are received in
                                                                                                            ADDRESSES: Submit your comments,                      number and other identifying
                                                    response to this rule, no further activity
                                                                                                            identified by Docket ID No. EPA–R08–                  information (subject heading, Federal
                                                    is contemplated. If EPA receives adverse                                                                      Register date and page number).
                                                                                                            OAR–2015–0205, at http://
                                                    comments, the direct final rule will be                                                                          • Follow directions—The agency may
                                                                                                            www.regulations.gov Web site. Follow
                                                    withdrawn and all public comments                                                                             ask you to respond to specific questions
                                                                                                            the online instructions for submitting
                                                    received will be addressed in a                                                                               or organize comments by referencing a
                                                                                                            comments. Once submitted, comments
                                                    subsequent final rule based on this                     cannot be edited or removed from                      Code of Federal Regulations (CFR) part
                                                    proposed rule. EPA will not institute a                 regulations.gov. The EPA may publish                  or section number.
                                                    second comment period. Any parties                      any comment received to its public                       • Explain why you agree or disagree;
                                                    interested in commenting on this action                 docket. Do not submit electronically any              suggest alternatives and substitute
                                                    should do so at this time. Please note                  information you consider to be                        language for your requested changes.
                                                    that, if EPA receives adverse comment                   Confidential Business Information (CBI)                  • Describe any assumptions and
                                                    on an amendment, paragraph, or section                  or other information whose disclosure is              provide any technical information and/
mstockstill on DSK4VPTVN1PROD with PROPOSALS




                                                    of this rule and if that provision may be               restricted by statute. Multimedia                     or data that you used.
                                                    severed from the remainder of the rule,                 submissions (audio, video, etc.) must be                 • If you estimate potential costs or
                                                    EPA may adopt as final those provisions                 accompanied by a written comment.                     burdens, explain how you arrived at
                                                    of the rule that are not the subject of an              The written comment is considered the                 your estimate in sufficient detail to
                                                    adverse comment. For additional                         official comment and should include                   allow for it to be reproduced.
                                                    information see the direct final rule,                  discussion of all points you wish to                     • Provide specific examples to
                                                    which is located in the Rules section of                make. The EPA will generally not                      illustrate your concerns and suggest
                                                    this Federal Register.                                  consider comments or comment                          alternatives.


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                                                    11728                    Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules

                                                      • Explain your views as clearly as                    with Montana’s request to classify                    attaining the NAAQS. The clean data
                                                    possible, avoiding the use of profanity                 Yellowstone County (which includes                    policy will be explained further in
                                                    or personal threats.                                    Billings) as unclassifiable for the 2010 1-           Section IV of this proposed rulemaking.
                                                      • Make sure to submit your                            hour SO2 standard and presented the                   A determination of attainment, or clean
                                                    comments by the comment period                          case that all of Yellowstone County                   data determination, does not constitute
                                                    deadline identified.                                    should be designated as nonattainment.                a formal redesignation to attainment. If
                                                    II. What is the background for the                      In an April 3, 2013 letter to the EPA,                EPA subsequently determines that an
                                                    EPA’s proposed actions?                                 Montana reiterated its request that                   area is no longer attaining the standard,
                                                                                                            Yellowstone County be designated                      those requirements that were suspended
                                                       On June 2, 2010, the EPA revised the                 unclassifiable, but requested an                      by the clean data determination are once
                                                    primary SO2 NAAQS, establishing a                       alternative nonattainment area                        again due.
                                                    new 1-hour SO2 standard of 75 parts per                 boundary consisting of only a small                      On April 10, 2015, James Parker of
                                                    billion (ppb). See 75 FR 35520 (June 2,                 portion of Billings if the EPA                        PPL Montana sent a letter to Ed Warner
                                                    2010). Under the EPA’s regulations at 40                determined that a nonattainment                       of MDEQ notifying him that the PPL
                                                    CFR part 50, the 2010 1-hour SO2                        designation was appropriate. The EPA                  Corette Plant was officially retired on
                                                    NAAQS is met at a monitoring site                       agreed with the State’s technical                     March 18, 2015, and had consumed its
                                                    when the 3-year average of the annual                   rationale for reducing the nonattainment              last coal on March 3, 2015. On May 13,
                                                    99th percentile of 1-hour daily                         area to a small portion of Billings which             2015, Gordon Criswell of PPL Montana
                                                    maximum concentrations is less than or                  included only one source of SO2: The                  sent a letter to MDEQ requesting a
                                                    equal to 75 ppb (based on the rounding                  PPL Corette Power Plant.4 The EPA                     revocation of the Montana Air Quality
                                                    convention in 40 CFR part 50, appendix                  found that Montana’s technical analysis               Permit (MAQP) #2953–00 and Title V
                                                    T). See 40 CFR 50.17. Ambient air                       demonstrated that the PPL Corette plant               Operating Permit #OP2953–08. On May
                                                    quality monitoring data for the 3-year                  was the key contributor to the 2010 SO2               21, 2015, David Klemp of MDEQ sent a
                                                    period must meet a data completeness                    NAAQS violations at the Coburn Road                   letter to Mr. Criswell informing him that
                                                    requirement. A year meets data                          monitor. The EPA, therefore, designated               MDEQ was revoking both permits, as
                                                    completeness requirements when all 4                    the area recommended by Montana as                    PPL had requested, effective
                                                    quarters are complete, and a quarter is                 nonattainment for the 2010 SO2 NAAQS                  immediately.
                                                    complete when at least 75 percent of the                on August 5, 2013, (effective October 4,                 On December 14, 2015, the State
                                                    sampling days for each quarter have                     2013) using 2009–2011 ambient air                     submitted to the EPA a request for
                                                    complete data. A sampling day has                       quality data, leaving the remaining                   redesignation of the Billings 2010 SO2
                                                    complete data if 75 percent of the                      portion of Billings and Yellowstone                   nonattainment area to attainment and a
                                                    hourly concentration values, including                  County undesignated and subject to                    SIP revision containing a maintenance
                                                    state-flagged data affected by                          future analysis and designation. See 78               plan for the area.
                                                    exceptional events which have been                      FR 47191 (August 5, 2013). This
                                                    approved for exclusion by the                                                                                 III. What are the criteria for
                                                                                                            nonattainment designation established                 redesignation?
                                                    Administrator, are reported.1                           an attainment date five years after the
                                                       Upon promulgation of a new or                        October 4, 2013, effective date for areas                The CAA provides the requirements
                                                    revised NAAQS, the CAA requires the                     classified as nonattainment for the 2010              for redesignating a nonattainment area
                                                    EPA to designate as nonattainment any                   1-hour SO2 NAAQS.5 Therefore, the                     to attainment. Specifically, section
                                                    area that does not meet (or that                        Billings SO2 nonattainment area’s                     107(d)(3)(E) of the CAA allows for
                                                    contributes to ambient air quality in a                 attainment date is October 4, 2018. The               redesignation of a nonattainment area
                                                    nearby area that does not meet) the                     Montana Department of Environmental                   provided that: (1) The Administrator
                                                    NAAQS.2 At the time the EPA                             Quality (MDEQ) was also required to                   determines that the area has attained the
                                                    conducted the initial round of                          submit an attainment SIP to EPA within                applicable NAAQS; (2) the
                                                    designations for the 2010 1-hour SO2                    18 months following the October 4,                    Administrator has fully approved the
                                                    primary NAAQS,3 Billings contained an                   2013 effective date of designation, or by             applicable implementation plan for the
                                                    SO2 monitor (Coburn Road) which                         April 6, 2015.6                                       area under section 110(k); (3) the
                                                    registered violations of the standard                      On January 16, 2015, MDEQ                          Administrator determines that the
                                                    based on the three most recent years of                 submitted a request for the EPA to                    improvement in air quality is due to
                                                    complete, quality assured, and certified                determine that the Billings SO2                       permanent and enforceable reductions
                                                    ambient air quality data. In a letter to                nonattainment area has attained the                   in emissions resulting from
                                                    the EPA, Montana Governor Brian                         2010 SO2 NAAQS per the EPA’s ‘‘clean                  implementation of the applicable SIP
                                                    Schweitzer requested that all 56                        data policy’’ (Billings 2010 SO2 Clean                and applicable federal air pollutant
                                                    counties in Montana be designated as                    Data Request).7 The clean data policy                 control regulations and other permanent
                                                    attainment or unclassifiable. The EPA                   represents the EPA’s interpretation that              and enforceable reductions; (4) the
                                                    responded to Montana’s initial                          certain planning-related requirements of              Administrator has fully approved a
                                                    designations request in a February 6,                   part D of the Act, such as the attainment             maintenance plan for the area as
                                                    2013 letter in which the EPA disagreed                  demonstration, reasonably available                   meeting the requirements of section
                                                                                                            control measures (RACM), and                          175A; and (5) the state containing such
                                                      1 40 CFR part 50, appendix T, section 3(b).           reasonable further progress (RFP), are                area has met all requirements applicable
                                                      2 CAA   section 107(d)(1)(A)(i).                                                                            to the area for purposes of redesignation
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                                                                                                            suspended for areas that are in fact
                                                      3 The EPA finalized nonattainment designations
                                                                                                                                                                  under section 110 and part D of the
                                                    for 29 areas of the U.S. that contained SO2 monitors
                                                    violating the NAAQS on August 5, 2013 (78 FR
                                                                                                              4 Montana’s recommended alternative boundary,       CAA.
                                                    47191, 47205), and took no designation-related          now the Billings 2010 SO2 Nonattainment Area, can        On April 16, 1992, the EPA provided
                                                    action on the rest of the country. The EPA was          be found in the Billings Redesignation Request at     guidance on redesignation in the
                                                    placed under a binding schedule for designation of      13.
                                                                                                              5 CAA section 192.                                  General Preamble for the
                                                    the remaining portions of the U.S. for the 2010
                                                    1-hour SO2 NAAQS on March 2, 2015. See, Sierra            6 CAA section 191.                                  Implementation of title I of the CAA
                                                    Club, et al. v. McCarthy, Case No. 13–cv–03953–SI         7 The Billings 2010 SO Clean Data Request is
                                                                                                                                      2
                                                                                                                                                                  Amendments of 1990 (57 FR 13498),
                                                    (N.D. Cal., March 2, 2015).                             available in the docket for this action.              and supplemented this guidance on


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                                                                                    Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules                                                                   11729

                                                    April 28, 1992 (57 FR 18070). The EPA                                 Criteria (1)—The Billings SO2                                   quality-assured in accordance with 40
                                                    has provided further guidance on                                      Nonattainment Area Has Attained the                             CFR part 58 and recorded in the EPA
                                                    processing redesignation requests in                                  2010 1-Hour SO2 NAAQS                                           Air Quality System (AQS). The EPA’s
                                                    several guidance documents. For the                                      For redesignating a nonattainment                            determination of attainment can be
                                                    purposes of this action, the EPA will be                              area to attainment, the CAA requires the                        based on monitoring data alone, without
                                                    referencing two of these documents: (1)                               EPA to determine that the area has                              the need for dispersion modeling
                                                    The September 4, 1992 Memorandum                                      attained the applicable NAAQS (CAA                              analyses, if the air agency provides an
                                                    from John Calcagni titled ‘‘Procedures                                section 107(d)(3)(E)(i)). The two primary                       analysis demonstrating that the
                                                    for Processing Requests to Redesignate                                methods for evaluating ambient air                              monitor(s) for the affected area is
                                                    Areas to Attainment,’’ (hereafter referred                            quality impacted by SO2 emissions are                           located in the area of maximum ambient
                                                    to as the ‘‘Calcagni Memo’’); and (2) The                             through dispersion modeling and air                             concentration of SO2.8
                                                    April 23, 2014 Memorandum from                                        quality monitoring. For SO2, an area                               In this action, the EPA is determining
                                                    Stephen D. Page titled ‘‘Guidance for 1-                              may in some circumstances be                                    that the Billings SO2 nonattainment area
                                                    Hour SO2 Nonattainment Area SIP                                       considered to be attaining the 2010                             is attaining the 2010 1-hour SO2
                                                                                                                          1-hour SO2 NAAQS if it meets the                                NAAQS. The EPA reviewed SO2
                                                    Submissions,’’ (hereafter referred to as
                                                                                                                          NAAQS as determined in accordance                               monitoring data from the lone
                                                    ‘‘2010 SO2 NAA Guidance’’).
                                                                                                                          with 40 CFR 50.17 and Appendix T of                             monitoring station inside the Billings
                                                    IV. What is EPA’s analysis of the                                     part 50, based on three complete,                               SO2 nonattainment area, the Coburn
                                                    request?                                                              consecutive calendar years of quality-                          Road station. The Coburn Road monitor
                                                                                                                          assured air quality monitoring data. To                         data have been quality-assured, are
                                                       EPA’s evaluation of Montana’s                                      attain the NAAQS based on monitoring,                           recorded in AQS, and indicate that the
                                                    redesignation request and maintenance                                 the 3-year average of the annual 99th                           area is attaining the 2010 1-hour SO2
                                                    plan was based on consideration of the                                percentile (fourth highest value) of 1-                         NAAQS. The fourth-highest 1-hour SO2
                                                    five redesignation criteria provided                                  hour daily maximum concentrations                               values at the Coburn Road monitor for
                                                    under CAA section 107(d)(3)(E).                                       measured at each monitor within an                              the 3-year averages of these values (i.e.,
                                                                                                                          area must be less than or equal to 75                           design values), are summarized in Table
                                                                                                                          ppb. The data must be collected and                             1, below.

                                                                                                       TABLE 1—COBURN ROAD MONITORED SO2 CONCENTRATIONS
                                                                                                                                                                                                                               2012–2014
                                                                                                                                                                                   2012           2013            2014           Design
                                                                                                                                                                                                                                 value

                                                    Annual 99th Percentile ....................................................................................................     70              48              93             70



                                                       As shown, the 3-year design value for                              consistently showed lower values than                           exceeds the NAAQS prior to the EPA
                                                    2012–2014 at the Coburn Road monitor                                  those at Coburn Road. The EPA has                               taking action in response to the State’s
                                                    meets the 2010 SO2 NAAQS. Further,                                    reviewed Montana’s information                                  request, the EPA will not take final
                                                    the EPA expects the SO2 emissions at                                  regarding this showing, but finds that it                       action to approve the redesignation
                                                    this monitor to decrease significantly                                is no longer applicable to the current                          request.11 As discussed in more detail
                                                    following the shutdown of the PPL                                     SO2 emissions mix in the Billings SO2                           below, Montana has committed to
                                                    Corette facility. Since the facility last                             nonattainment area because the sole SO2                         continue monitoring in this area in
                                                    operated on March 3, 2015, the values                                 source in the area (PPL Corette) has shut                       accordance with 40 CFR part 58.
                                                    at the Coburn Road monitor have not                                   down. The EPA does not find it                                    As noted, Montana separately
                                                    exceeded 19 ppb SO2. This trend is                                    necessary to require the State to conduct                       submitted to the EPA a request for a
                                                    anticipated to be permanent, as the State                             new modeling or exploratory                                     determination of clean data for the
                                                    indicated in its analysis that SO2                                    monitoring as recommended by EPA’s                              Billings SO2 nonattainment area on
                                                    emissions have since 2010 consistently                                May 2013 Draft Monitoring Technical                             January 16, 2015. The clean data policy
                                                    decreased to levels well below the                                    Assistance Document (TAD)10 to                                  represents the EPA’s interpretation that
                                                    NAAQS during times when PPL Corette                                   determine the point of maximum                                  certain requirements of part D of title I
                                                    was not operating.9                                                   concentration in the nonattainment area                         of the Act are suspended for areas that
                                                       As part of Montana’s redesignation                                 because the source of concern in the                            are currently attaining the NAAQS. The
                                                    request, the State submitted information                              area has shut down and been                                     requirements that are suspended in an
                                                    to support a showing that the Coburn                                  dismantled, resulting in SO2                                    area attaining the standard include the
                                                    Road monitor was sited in the area of                                 concentrations well below the standard.                         requirements to submit an ‘‘attainment
                                                    maximum ambient SO2 concentration                                        In this action, the EPA is proposing to                      SIP’’ that provides for: Attainment of the
                                                    within the Billings SO2 nonattainment                                 determine that the Billings SO2                                 NAAQS; implementation of all RACM;
                                                    area in accordance with the 2010 SO2                                  nonattainment area is attaining the 2010                        RFP; and implementation of
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                                                    NAA Guidance. This showing included                                   1-hour SO2 NAAQS, and therefore                                 contingency measures for failure to meet
                                                    data from historical monitors near the                                meets the requirements of CAA section                           deadlines for RFP and attainment. In the
                                                    Coburn Road monitor which                                             107(d)(3)(E)(i). If the 3-year design value                     2010 SO2 NAA guidance, the EPA
                                                      8 See2010 SO2 NAA Guidance, at 62.                                  ‘‘SO2 NAAQS Designations Source-Oriented                        TAD with regard to reviewing clean data
                                                      9 Billings
                                                               Redesignation Request at 8–12.                             Monitoring Technical Assistance Document,’’                     determinations, the EPA also considers the TAD
                                                      10 On page 58 of the 2010 SO NAA Guidance,                          Office of Air Quality Planning and Standards, Air               recommendations applicable to attainment
                                                                                  2
                                                                                                                          Quality Assessment Division. Although this 2010                 demonstrations.
                                                    EPA recommends that air agencies follow the Draft
                                                                                                                          SO2 NAA Guidance references the Draft monitoring                  11 See 2010 SO NAA Guidance, at 56.
                                                                                                                                                                                                           2




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                                                    11730                       Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules

                                                    explained our intention to apply the                       section 107(d)(3)(E)(ii). In making these   linked with a particular area’s
                                                    EPA’s clean data policy to the 2010 SO2                    determinations, the EPA ascertained         designation and classification are the
                                                    primary NAAQS.12 Because EPA’s                             which requirements are applicable to        relevant measures to evaluate in
                                                    analysis in determining whether an area                    the Billings SO2 nonattainment area         reviewing a redesignation request. This
                                                    has attained under the clean data policy                   and, if applicable, that they are fully     approach is consistent with the EPA’s
                                                    is the same as its analysis under the first                approved under section 110(k).              existing policy on applicability (i.e., for
                                                    redesignation criterion, EPA is also here                                                              redesignations) of conformity and
                                                                                                               a. The Billings SO2 Nonattainment Area
                                                    proposing that the Billings SO2                                                                        oxygenated fuels requirements, as well
                                                                                                               Has Met All Applicable Requirements
                                                    nonattainment area qualifies for a                                                                     as with section 184 ozone transport
                                                                                                               Under Section 110 and Part D of the
                                                    determination of attainment under the                                                                  requirements. See Reading,
                                                                                                               CAA
                                                    clean data policy, based on the 2012–                                                                  Pennsylvania, proposed and final
                                                    2014 monitoring data from the Coburn                          General SIP requirements. General SIP rulemakings (61 FR 53174–53176,
                                                    Road monitor. In the event that EPA                        elements and requirements are               October 10, 1996), (62 FR 24826, May 7,
                                                    does not finalize the proposed                             delineated in section 110(a)(2) of title I, 2008); Cleveland-Akron-Loraine, Ohio,
                                                    redesignation, EPA may choose to                           part A of the CAA. These requirements       final rulemaking (61 FR 20458, May
                                                    separately finalize the clean data                         include, but are not limited to, the        7,1996); and Tampa, Florida, final
                                                    determination, thereby suspending                          following: Submittal of a SIP that has      rulemaking at (60 FR 62748, December
                                                    Montana’s obligation to submit the                         been adopted by the state after             7, 1995). See also the discussion on this
                                                    attainment planning-related                                reasonable public notice and hearing;       issue in the Cincinnati, Ohio,
                                                    requirements for the area for as long as                   provisions for establishment and            redesignation (65 FR 37890, June 19,
                                                    the area continues to attain the                           operation of appropriate procedures         2000), and in the Pittsburgh,
                                                    standard. As with its analysis that the                    needed to monitor ambient air quality;      Pennsylvania, redesignation (66 FR
                                                    area has attained under the                                implementation of a source permit           50399, October 19, 2001).
                                                    redesignation requirements, for                            program; provisions for the                    Title I, Part D, applicable SIP
                                                    purposes of the clean data                                 implementation of part C requirements       requirements. Section 172(c) of the CAA
                                                    determination, the EPA is not requiring                    (Prevention of Significant Deterioration    sets forth the basic requirements of
                                                    Montana to demonstrate that the                            (PSD)) and provisions for the               attainment plans for nonattainment
                                                    monitor is located in the area of                          implementation of part D requirements       areas that are required to submit them
                                                    maximum concentration in accordance                        (New Source Review (NSR) permit             pursuant to section 172(b). Subpart 5 of
                                                    with the 2010 SO2 NAA Guidance due                         programs); provisions for air pollution     part D, which includes section 191 and
                                                    to the unique circumstances associated                     modeling; and provisions for public and 192 of the CAA, establishes
                                                    with the PPL Corette shutdown.13                           local agency participation in planning      requirements for SO2, nitrogen dioxide
                                                                                                               and emission control rule development. and lead nonattainment areas. A
                                                    Criteria (2)—Montana Has a Fully                              Section 110(a)(2)(D) requires that SIPs thorough discussion of the requirements
                                                    Approved SIP Under Section 110(k);                         contain certain measures to prevent         contained in sections 172(c) can be
                                                    and Criteria (5)—Montana Has Met All                       sources in a state from significantly       found in the General Preamble for
                                                    Applicable Requirements Under Section                      contributing to air quality problems in     Implementation of Title I (57 FR 13498).
                                                    110 and Part D of Title I of the CAA                       another state. To implement this               Subpart 5 Section 172 Requirements.
                                                      For redesignating a nonattainment                        provision, the EPA has required certain     Section 172(c)(1) requires the plans for
                                                    area to attainment under a NAAQS, the                      states to establish programs to address     all nonattainment areas to provide for
                                                    CAA requires the EPA to determine that                     the interstate transport of air pollutants. the implementation of all RACM as
                                                    the state has met all applicable                           The section 110(a)(2)(D) requirements       expeditiously as practicable and to
                                                    requirements for that NAAQS under                          for a state are not linked with a           provide for attainment of the NAAQS.
                                                    section 110 and part D of title I of the                   particular nonattainment area’s             The EPA interprets this requirement to
                                                    CAA (CAA section 107(d)(3)(E)(v)) and                      designation and classification in that      impose a duty on all nonattainment
                                                    that the state has a fully approved SIP                    state. The EPA believes that the            areas to consider all available control
                                                    under section 110(k) for that NAAQS for                    requirements linked with a particular       measures and to adopt and implement
                                                    the area (CAA section 107(d)(3)(E)(ii)).                   nonattainment area’s designation and        such measures as are reasonably
                                                    The EPA proposes to find that Montana                      classifications are the relevant measures available for implementation in each
                                                    has met all applicable SIP requirements                    to evaluate in reviewing a redesignation area as components of the area’s
                                                    for the Billings SO2 nonattainment area                    request. The transport SIP submittal        attainment demonstration. Under
                                                    for the 2010 SO2 NAAQS under section                       requirements, where applicable,             section 172, states with nonattainment
                                                    110 of the CAA (general SIP                                continue to apply to a state regardless of areas must submit plans providing for
                                                    requirements) for purposes of                              the designation of any one particular       timely attainment and meeting a variety
                                                    redesignation. Additionally, the EPA                       area in the state. Thus, the EPA does not of other requirements.
                                                    proposes to find that the Montana SIP                      believe that the CAA’s interstate              The EPA’s longstanding interpretation
                                                    satisfies the criterion that it meets                      transport requirements should be            of the nonattainment planning
                                                    applicable SIP requirements for                            construed to be applicable requirements requirements of section 172 is that once
                                                    purposes of redesignation under part D                     for purposes of redesignation.              an area is attaining the NAAQS, those
                                                    of title I of the CAA in accordance with                      In addition, the EPA believes other      requirements are not ‘‘applicable’’ for
                                                                                                               section 110 elements that are neither       purposes of CAA section 107(d)(3)(E)(ii)
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                                                    section 107(d)(3)(E)(v). Further, the EPA
                                                    proposes to determine that the SIP is                      connected with nonattainment plan           and therefore need not be approved into
                                                    fully approved with respect to all                         submissions nor linked with an area’s       the SIP before the EPA can redesignate
                                                    requirements applicable for the 2010                       attainment status are applicable            the area. In the 1992 General Preamble
                                                    SO2 NAAQS for purposes of                                  requirements for purposes of                for Implementation of Title I, the EPA
                                                    redesignation in accordance with                           redesignation. The area will still be       set forth its interpretation of applicable
                                                                                                               subject to these requirements after the     requirements for purposes of evaluating
                                                      12 Id.   at 52.                                          area is redesignated. The section 110       redesignation requests when an area is
                                                      13 Id.   at 58.                                          and part D requirements which are           attaining a standard. See 57 FR 13498,


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                                                                             Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules                                             11731

                                                    13564 (April 16, 1992). The EPA noted                   the maintenance plan.14 MDEQ                           enforcement, and enforceability that the
                                                    that the requirements for RFP and other                 submitted an emissions inventory as                    EPA promulgated pursuant to its
                                                    measures designed to provide for                        part of the maintenance plan for the                   authority under the CAA.
                                                    attainment do not apply in evaluating                   Billings SO2 nonattainment area, and                      Montana has an approved general
                                                    redesignation requests because those                    this inventory will be discussed further               conformity SIP for the Billings area. See
                                                    nonattainment planning requirements                     in the maintenance plan portion of this                67 FR 62392 (October 7, 2002).
                                                    ‘‘have no meaning’’ for an area that has                proposed action.                                       Moreover, the EPA interprets the
                                                    already attained the standard. Id. This                    Section 172(c)(4) requires the                      conformity SIP requirements as not
                                                    interpretation was also set forth in the                identification and quantification of                   applying for purposes of evaluating a
                                                    Calcagni Memo. The EPA’s                                allowable emissions for major new and                  redesignation request under section
                                                    understanding of section 172 also forms                 modified stationary sources to be                      107(d) because, like other requirements
                                                    the basis of its Clean Data Policy, which               allowed in an area, and section 172(c)(5)              listed above, state conformity rules are
                                                    was articulated with regard to SO2 in                   requires source permits for the                        still required after redesignation and
                                                    the 2010 SO2 NAA Guidance, and                          construction and operation of new and                  federal conformity rules apply where
                                                    suspends a state’s obligation to submit                 modified major stationary sources                      state rules have not been approved. See
                                                    most of the attainment planning                         anywhere in the nonattainment area.                    Wall v. EPA, 265 F.3d 426 (6th Cir.
                                                    requirements that would otherwise                       The EPA has determined that, since PSD                 2001) (upholding this interpretation);
                                                    apply, including an attainment                          requirements will apply after                          see also 60 FR 62748 (December 7,
                                                    demonstration and planning SIPs to                      redesignation, areas being redesignated                1995) (redesignation of Tampa, Florida).
                                                                                                            need not comply with the requirement                      For these reasons, the EPA proposes
                                                    provide for RFP, RACM, and
                                                                                                            that a NSR program be approved prior                   to find that Montana has satisfied all
                                                    contingency measures under section                                                                             applicable requirements for purposes of
                                                                                                            to redesignation, provided that the area
                                                    172(c)(9). Courts have upheld the EPA’s                                                                        redesignation of the Billings SO2
                                                                                                            demonstrates maintenance of the
                                                    interpretation of section 172(c)(1) for                                                                        nonattainment area under section 110
                                                                                                            NAAQS without part D NSR. A more
                                                    ‘‘reasonably available’’ control measures                                                                      and part D of title I of the CAA.
                                                                                                            detailed rationale for this view is
                                                    and control technology as meaning only                  described in a memorandum from Mary
                                                    those controls that advance attainment,                                                                        b. The Billings SO2 Nonattainment Area
                                                                                                            Nichols, Assistant Administrator for Air               Has a Fully Approved Applicable SIP
                                                    which precludes the need to require                     and Radiation, dated October 14, 1994,
                                                    additional measures where an area is                                                                           Under Section 110(k) of the CAA
                                                                                                            entitled ‘‘Part D New Source Review
                                                    already attaining. NRDC v. EPA, 571                     Requirements for Areas Requesting                         The EPA has fully approved the
                                                    F.3d 1245, 1252 (D.C. Cir. 2009); Sierra                Redesignation to Attainment.’’ MDEQ                    applicable Montana SIP for the Billings
                                                    Club v. EPA, 294 F.3d 155, 162 (D.C.                    has demonstrated that the Billings SO2                 Area under section 110(k) of the CAA
                                                    Cir. 2002); Sierra Club v. EPA, 314 F.3d                nonattainment area will be able to                     for all requirements applicable for
                                                    735, 744 (5th Cir. 2002); Sierra Club v.                maintain the NAAQS without part D                      purposes of redesignation. As indicated
                                                    EPA, 375 F.3d 537 (7th Cir. 2004). But                  NSR in effect, and therefore Montana                   above, the EPA believes that the section
                                                    see Sierra Club v. EPA, 793 F.3d 656                    need not have fully approved part D                    110 elements that are neither connected
                                                    (6th Cir. 2015).                                        NSR programs prior to approval of the                  with nonattainment plan submissions
                                                       Therefore, because attainment has                    redesignation request. Montana’s PSD                   nor linked to an area’s nonattainment
                                                    been reached in the Billings SO2                        program will become effective in the                   status are not applicable requirements
                                                    nonattainment area, no additional                       Billings SO2 nonattainment area upon                   for purposes of redesignation. The EPA
                                                    measures are needed to provide for                      redesignation to attainment.                           has approved all part D requirements
                                                    attainment, and section 172(c)(1)                          Section 172(c)(7) requires the SIP to               applicable under the 2010 SO2 NAAQS,
                                                    requirements for an attainment                          meet the applicable provisions of                      as identified above, for purposes of this
                                                    demonstration and RACM are not part                     section 110(a)(2). As noted above, the                 redesignation.
                                                    of the ‘‘applicable implementation                      EPA believes the Montana SIP meets the
                                                                                                                                                                   Criteria (3)—The Air Quality
                                                    plan’’ required to have been approved                   requirements of section 110(a)(2)
                                                                                                                                                                   Improvement in the Billings SO2
                                                    prior to redesignation per CAA section                  applicable for purposes of
                                                                                                                                                                   Nonattainment Area Is Due to
                                                    107(d)(3)(E)(ii). The other section 172                 redesignation.
                                                                                                               Section 176 Conformity                              Permanent and Enforceable Reductions
                                                    requirements that are designed to help                                                                         in Emissions
                                                    an area achieve attainment—the section                  Requirements. Section 176(c) of the
                                                                                                            CAA requires states to establish criteria                 For redesignating a nonattainment
                                                    172(c)(2) requirement that
                                                                                                            and procedures to ensure that federally                area to attainment, the CAA requires the
                                                    nonattainment plans contain provisions
                                                                                                            supported or funded projects conform to                EPA to determine that the air quality
                                                    promoting reasonable further progress,
                                                                                                            the air quality planning goals in the                  improvement in the area is due to
                                                    the requirement to submit the section
                                                                                                            applicable SIP. The requirement to                     permanent and enforceable reductions
                                                    172(c)(9) contingency measures, and the
                                                                                                            determine conformity applies to                        in emissions resulting from
                                                    section 172(c)(6) requirement for the SIP
                                                                                                            transportation plans, programs, and                    implementation of the SIP, applicable
                                                    to contain control measures necessary to
                                                                                                            projects that are developed, funded, or                federal air pollution control regulations,
                                                    provide for attainment of the NAAQS—
                                                                                                            approved under title 23 of the United                  and other permanent and enforceable
                                                    are also not required to be approved as
                                                                                                            States Code (U.S.C.) and the Federal                   reductions (CAA section
                                                    part of the ‘‘applicable implementation
                                                                                                            Transit Act (transportation conformity)                107(d)(3)(E)(iii)). The EPA proposes to
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                                                    plan’’ for purposes of satisfying CAA
                                                                                                            as well as to all other federally                      find that Montana has demonstrated
                                                    section 107(d)(3)(E)(ii).
                                                                                                            supported or funded projects (general                  that the observed air quality
                                                       Section 172(c)(3) requires submission                conformity). State transportation                      improvement in the Billings SO2
                                                    and approval of a comprehensive,                        conformity SIP revisions must be                       nonattainment area is due to permanent
                                                    accurate, and current inventory of actual               consistent with federal conformity                     and enforceable reductions in
                                                    emissions. The requirement for an                       regulations relating to consultation,                  emissions. Specifically, the EPA
                                                    emission inventory can be satisfied by                                                                         considers the shutdown of the PPL
                                                    meeting the inventory requirements of                     14 Calcagni   Memo at 6.                             Corette Plant, identified as the key


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                                                    11732                           Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules

                                                    contributor to the SO2 NAAQS                                         to determine that the area has a fully                               is discussed more fully below, the EPA
                                                    violations at the Coburn Road                                        approved maintenance plan pursuant to                                is proposing to determine that
                                                    monitor,15 to be both permanent and                                  section 175A of the CAA (CAA section                                 Montana’s maintenance plan includes
                                                    enforceable. The EPA notes that the                                  107(d)(3)(E)(iv)). In conjunction with its                           all the necessary components and is
                                                    Corette facility was still operating                                 request to redesignate the Billings SO2                              thus proposing to approve it as a
                                                    (though not continuously) 16 during the                              nonattainment area to attainment for the                             revision to the Montana SIP.
                                                    2012–2014 period during which the                                    2010 1-hour SO2 NAAQS, MDEQ
                                                    2010 SO2 NAAQS was attained in the                                   submitted a SIP revision to provide for                              b. Attainment Emissions Inventory
                                                    Billings nonattainment area. Given the                               the maintenance of the 2010 1-hour SO2
                                                    well-established correlation of much                                 NAAQS for at least 10 years after the                                   As part of a state’s maintenance plan
                                                    lower SO2 emissions at the Coburn Road                               effective date of redesignation to                                   for a 2010 SO2 nonattainment area, the
                                                    monitor during periods when Corette                                  attainment. The EPA is proposing to                                  air agency should develop an attainment
                                                    has not operated, EPA anticipates that                               find that this maintenance plan for the                              inventory to identify the level of
                                                    the SO2 NAAQS will only attain by a                                  area meets the requirements for                                      emissions in the affected area which is
                                                    greater margin following the facility’s                              approval under section 175A of the                                   sufficient to attain and maintain the SO2
                                                    shutdown. As stated in the Calcagni                                  CAA.                                                                 NAAQS.19 Montana selected 2014 as the
                                                    Memo, ‘‘Emission reductions from                                                                                                          base year (i.e., attainment emissions
                                                                                                                         a. What is required in a maintenance
                                                    source shutdowns can be considered                                                                                                        inventory year) for developing an
                                                                                                                         plan?
                                                    permanent and enforceable to the extent                                                                                                   emissions inventory for SO2 in the
                                                    that those shutdowns have been                                          CAA section 175A sets forth the                                   nonattainment area through 2024. In
                                                    reflected in the SIP and all applicable                              elements of a maintenance plan for                                   2014, the final full calendar year in
                                                    permits have been modified                                           areas seeking redesignation from                                     which PPL Corette was permitted to
                                                    accordingly.’’ 17 MDEQ revoked PPL’s                                 nonattainment to attainment. Under                                   operate prior to the March 2015
                                                    Title V (operating) and NSR permits for                              section 175A, the plan must
                                                                                                                                                                                              shutdown, the facility emitted 1,433
                                                    the Corette facility.18 Further, the PPL                             demonstrate continued attainment of
                                                                                                                                                                                              tons of SO2.20
                                                    Corette facility has been dismantled,                                the applicable NAAQS for at least 10
                                                    making its future operation impossible                               years after the Administrator approves a                                In 2014, the Coburn Road monitor
                                                    and thus displaying the permanence of                                redesignation to attainment. Eight years                             reported exceedances of the 2010 SO2
                                                    the emissions reductions in the                                      after the redesignation, the state must                              NAAQS on eight different days, giving
                                                    nonattainment area. Any new sources                                  submit a revised maintenance plan                                    the monitor a 99th percentile (4th
                                                    that may come into being within the                                  demonstrating that attainment will                                   highest 1-hour daily maximum
                                                    area would be required to demonstrate                                continue to be maintained for the 10                                 concentration) of 93 ppb. Regardless,
                                                    that their new SO2 emissions would not                               years following the initial 10-year                                  the 2014 emissions level of 1,433 tons
                                                    interfere with attainment and                                        period. To address the possibility of                                of SO2 is the lowest level of any year in
                                                    maintenance of the 2010 SO2 NAAQS.                                   future NAAQS violations, the                                         the attaining 2012 to 2014 period,
                                                    Therefore, the EPA is proposing to find                              maintenance plan must contain                                        making it the most conservative option
                                                    that the air quality improvement in the                              contingency measures as the EPA deems                                for the purposes of ensuring future
                                                    Billings SO2 nonattainment area is due                               necessary to assure prompt correction of                             maintenance of the NAAQS (see Table
                                                    to permanent and enforceable                                         any future 2010 1-hour SO2 violations.
                                                                                                                                                                                              2). The EPA has therefore determined
                                                    reductions in emissions.                                             The Calcagni Memo provides further
                                                                                                                                                                                              that this is a level sufficient to attain the
                                                                                                                         guidance on the content of a
                                                    Criteria (4)—The Billings SO2                                        maintenance plan, explaining that a                                  2010 1-hour SO2 NAAQS, and is
                                                    Nonattainment Area Has a Fully                                       maintenance plan should address five                                 proposing to find that the attainment
                                                    Approved Maintenance Plan Pursuant                                   requirements: The attainment emissions                               inventory submitted as part of
                                                    to Section 175A of the CAA                                           inventory, maintenance demonstration,                                Montana’s maintenance plan meets the
                                                      To redesignate a nonattainment area                                monitoring, verification of continued                                ‘‘Attainment Emissions Inventory’’
                                                    to attainment, the CAA requires the EPA                              attainment, and a contingency plan. As                               requirement.

                                                                                              TABLE 2—ANNUAL SO2 EMISSIONS IN BILLINGS NONATTAINMENT AREA
                                                                                                                       Year                                                                               2012          2013            2014

                                                    Annual SO2 Emissions (tons) ..................................................................................................................        1,884        2,247            1,433



                                                       The EPA notes that the permanent                                  nonattainment area for each year from                                NAAQS by either showing that future
                                                    shutdown of PPL Corette has left the                                 2016 through 2024. The EPA therefore                                 emissions of SO2 will not exceed the
                                                    Billings SO2 nonattainment area with no                              does not anticipate emissions activity in                            level of the attainment inventory, or by
                                                    sources of SO2, and the maintenance                                  the 2010 SO2 nonattainment area that                                 modeling to show that the future mix of
                                                    plan for the area contains an emissions                              will approach 1,433 tons of SO2.                                     sources and emission rates will not
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                                                    inventory (in the ‘‘Maintenance                                      c. Maintenance Demonstration                                         cause a violation of the NAAQS.21
                                                    Demonstration’’ section) which projects                                                                                                   Montana has demonstrated maintenance
                                                                                                                            An air agency may generally
                                                    a level of zero SO2 emissions in the                                                                                                      by showing that future year emissions
                                                                                                                         demonstrate maintenance of the
                                                      15 See EPA’s final Technical Support Document                        16 The Corette facility did not operate for several                   19 See
                                                                                                                                                                                                      2010 SO2 NAA Guidance, at 66.
                                                    (TSD) for the Billings SO2 Nonattainment Area, in                    consecutive months in both 2012 and 2014.                               20 PPL
                                                                                                                                                                                                      Corette did not operate for nearly five
                                                                                                                           17 Calcagni Memo at 10.
                                                    the docket for EPA’s initial round of 2010 SO2                                                                                            months during 2014.
                                                                                                                           18 Permit revocation letters are included in the
                                                    designations at EPA–HQ–OAR–2012–0233–0318.                                                                                                 21 See 2010 SO NAA Guidance at 67.
                                                                                                                                                                                                              2
                                                                                                                         docket for this action.



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                                                                                 Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules                                                                   11733

                                                    (through ‘‘out year’’ 2024) of SO2 in the                      remain at zero following the PPL Corette                      emissions inventory 22 has been
                                                    maintenance area are expected to                               shutdown. The State’s projected                               reproduced as Table 3, below:

                                                                             TABLE 3—BILLINGS SO2 NONATTAINMENT AREA SO2 PROJECTED EMISSIONS INVENTORY
                                                                                         Year                                             2014      2015   2016        2017   2018    2019     2020    2021     2022    2023     2024

                                                    Annual SO2 Emissions (tons) ......................................................    1433      460         0        0      0         0      0       0        0        0       0



                                                       The EPA considers the inventory                             necessary to assure that the state will                       measures are adequate to ensure
                                                    projection of zero emissions sufficient to                     promptly correct a violation of the                           continued maintenance of the 2010 SO2
                                                    attain and maintain the SO2 NAAQS.                             NAAQS that occurs after redesignation.                        NAAQS in the area or to return the area
                                                    The EPA is therefore also proposing to                         The maintenance plan should identify                          to attainment of the NAAQS. The
                                                    find that the State’s ‘‘Maintenance                            the contingency measures to be adopted,                       implementation of the control measures
                                                    Demonstration’’ requirement is met                             a schedule and procedure for adoption                         stemming from an action level response
                                                    based on this projected emissions                              and implementation, and a time limit                          will take place no later than 18 months
                                                    inventory.                                                     for action by the state. A state should                       after the end of the calendar year in
                                                    d. Monitoring Network                                          also identify specific indicators to be                       which the action level response was
                                                                                                                   used to determine when the                                    prompted. Montana noted that, since
                                                       Montana has committed to continue                           contingency measures need to be                               the only source in the nonattainment
                                                    operating the Coburn Road monitor at                           implemented. The maintenance plan                             area has shut down, it is not possible at
                                                    its current location in the Billings SO2                       must also include a requirement that a                        this time to develop specific
                                                    nonattainment area. The State also                             state will implement all measures with                        contingency measures until the cause of
                                                    committed to operating the monitor in                          respect to control of the pollutant that                      the elevated concentrations is known.
                                                    accordance with the requirements of 40                         were contained in the SIP before                              The EPA is proposing to find that
                                                    CFR part 58, and have thus addressed                           redesignation of the area to attainment                       Montana’s maintenance plan meets the
                                                    the requirement for monitoring. The                            in accordance with section 175A(d).                           ‘‘Contingency Measures’’ requirement.
                                                    EPA approved Montana’s monitoring                                 The contingency plan includes a                               The EPA has concluded that the
                                                    plan on January 13, 2015. The EPA is                           triggering mechanism to determine                             maintenance plan adequately addresses
                                                    proposing to find that Montana’s                               when contingency measures are needed                          the five basic components of a
                                                    maintenance plan meets the                                     and a process of developing and                               maintenance plan: The attainment
                                                    ‘‘Monitoring Network’’ requirement.                            implementing appropriate control                              emissions inventory, maintenance
                                                    e. Verification of Continued Attainment                        measures. The State listed two types of                       demonstration, monitoring, verification
                                                       Each air agency should ensure that it                       triggers of its contingency plan. The                         of continued attainment, and a
                                                    has the legal authority to implement and                       first, a ‘‘warning level response,’’ will be                  contingency plan. Therefore, the EPA
                                                    enforce all measures necessary to attain                       triggered by a 99th percentile of 1-hour                      proposes to find that the maintenance
                                                    and maintain the 2010 SO2 NAAQS.                               daily maximum SO2 values greater than                         plan SIP revision submitted by Montana
                                                    The air agency’s submittal should                              65 ppb in a single calendar year. The                         for the Billings 2010 SO2 nonattainment
                                                    indicate how it will track the progress                        second, an ‘‘action level response,’’ is                      area meets the requirements of section
                                                    of the maintenance plan for the area                           triggered when such a value exceeds 70                        175A of the CAA and is approvable.
                                                    either through air quality monitoring or                       ppb in a single calendar year.
                                                                                                                      If the warning level response is                           V. What are the actions the EPA is
                                                    modeling.23                                                                                                                  proposing to take?
                                                       The State of Montana has the legal                          triggered, the State must conduct a
                                                    authority to enforce and implement the                         study to determine whether the SO2                               The EPA is proposing to take the
                                                    maintenance plan for the Billings 2010                         values near the level of the 2010 SO2                         following four separate but related
                                                    SO2 nonattainment area. This includes                          NAAQS (75 ppb) are the result of a                            actions: (1) Determine that the Billings
                                                    the authority to adopt, implement, and                         trend, and if so, what control measures                       SO2 nonattainment area is attaining the
                                                    enforce any subsequent emissions                               are necessary to reverse that trend. The                      2010 1-hour SO2 NAAQS; (2) Approve
                                                    control contingency measures                                   implementation of the control measures                        Montana’s plan for maintaining the
                                                    determined to be necessary to correct                          stemming from a warning level response                        2010 1-hour SO2 NAAQS (maintenance
                                                    future SO2 attainment problems.24 As                           will take place no later than 18 months                       plan); (3) Redesignate the Billings SO2
                                                    noted, the State will track the progress                       after the end of the calendar year in                         nonattainment area to attainment for the
                                                    of the maintenance plan by continuing                          which a determination requiring control                       2010 1-hour SO2 NAAQS; and (4)
                                                    to operate the Coburn Road monitor. For                        measures was made. If the action level                        determine that the Billings SO2
                                                    these reasons, the EPA is proposing to                         response is triggered and is not found to                     nonattainment area has clean
                                                    find that Montana’s maintenance plan                           be due to an exceptional event as                             monitoring data. Section IV of this
                                                    meets the ‘‘Verification of Continued                          defined at 40 CFR part 50.1(j), the State                     notice provides a discussion of each of
                                                    Attainment’’ requirement.                                      will work with the entity or entities                         these proposed actions.
                                                                                                                   believed to be responsible for the high                          The EPA proposes to determine that
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                                                    f. Contingency Measures in the                                 levels of SO2 to evaluate control                             the Billings SO2 nonattainment area has
                                                    Maintenance Plan                                               measures necessary to ensure future                           attained the 2010 1-hour SO2 standard
                                                       Section 175A of the CAA requires that                       attainment of the NAAQS. Montana                              by the October 4, 2018, required
                                                    a maintenance plan include such                                must submit to the EPA its analysis                           attainment date. This determination is
                                                    contingency measures as the EPA deems                          demonstrating that the proposed control                       based on complete, quality-assured, and
                                                       22 The State’s emissions inventory projection is              23 2010   SO2 Guidance at 67–68.                              24 EPA last determined that Montana’s SIP was

                                                    listed as Figure 3.2 in the Billings SO2                                                                                     sufficient to meet the requirements of 110(a)(2)(E)(i)
                                                    Redesignation Request, at 23.                                                                                                of the CAA on July 30, 2013 (78 FR 45864).



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                                                    11734                    Federal Register / Vol. 81, No. 44 / Monday, March 7, 2016 / Proposed Rules

                                                    certified monitoring data for the 2012–                 rulemaking. The EPA has made, and                        • Are not subject to requirements of
                                                    2014 monitoring period. The EPA is also                 will continue to make, these documents                section 12(d) of the National
                                                    proposing to approve the maintenance                    generally available electronically                    Technology Transfer and Advancement
                                                    plan under the 2010 NAAQS for the                       through www.regulations.gov and/or in                 Act of 1995 (15 U.S.C. 272 note) because
                                                    Billings SO2 nonattainment area into the                hard copy at the appropriate EPA office               application of those requirements would
                                                    Montana SIP (under CAA section 175A).                   (see the ADDRESSES section of this rule’s             be inconsistent with the CAA; and
                                                    The maintenance plan demonstrates                       preamble for more information).                          • Do not provide EPA with the
                                                    that the area will continue to maintain                                                                       discretionary authority to address, as
                                                                                                            VII. Statutory and Executive Order
                                                    the 2010 1-hour SO2 NAAQS, and                                                                                appropriate, disproportionate human
                                                                                                            Reviews
                                                    includes a process to develop                                                                                 health or environmental effects, using
                                                    contingency measures to remedy any                         Under the CAA, redesignation of an                 practicable and legally permissible
                                                    future violations of the 2010 1-hour SO2                area to attainment and the                            methods, under Executive Order 12898
                                                    NAAQS and procedures for evaluation                     accompanying approval of a                            (59 FR 7629, February 16, 1994).
                                                    of potential violations.                                maintenance plan under section                           In addition, the SIP does not apply on
                                                       Additionally, the EPA is proposing to                107(d)(3)(E) are actions that affect the              any Indian reservation land or in any
                                                    determine that the Billings SO2                         status of a geographical area and do not              other area where the EPA or an Indian
                                                    nonattainment area has met the criteria                 impose any additional regulatory                      tribe has demonstrated that a tribe has
                                                    under CAA section 107(d)(3)(E) for                      requirements on sources beyond those                  jurisdiction. In those areas of Indian
                                                    redesignation from nonattainment to                     imposed by state law. A redesignation to              country, the proposed rule does not
                                                    attainment for the 2010 1-hour SO2                      attainment does not in and of itself                  have tribal implications and will not
                                                    NAAQS. On this basis, the EPA is                        create any new requirements, but rather               impose substantial direct costs on tribal
                                                    proposing to approve Montana’s                          results in the applicability of                       governments or preempt tribal law as
                                                    redesignation request for the area. Final               requirements contained in the CAA for                 specified by Executive Order 13175 (65
                                                    approval of Montana’s redesignation                     areas that have been redesignated to                  FR 67249, November 9, 2000).
                                                    request would change the legal                          attainment. Moreover, the Administrator
                                                    designation of the portion of                           is required to approve a SIP submission               List of Subjects in 40 CFR Part 52
                                                    Yellowstone County designated                           that complies with the provisions of the                Environmental protection, Air
                                                    nonattainment at 40 CFR part 81.327 to                  Act and applicable Federal regulations.               pollution control, Carbon monoxide,
                                                    attainment for the 2010 1-hour SO2                      See 42 U.S.C. 7410(k); 40 CFR 52.02(a).               Incorporation by reference,
                                                    NAAQS.                                                  Thus, in reviewing SIP submissions,                   Intergovernmental relations, Lead,
                                                       The EPA is also proposing to                         EPA’s role is to approve state choices,               Nitrogen dioxide, Ozone, Particulate
                                                    determine that the Billings SO2                         provided that they meet the criteria of               matter, Reporting and recordkeeping
                                                    nonattainment area has attaining                        the CAA. Accordingly, these proposed                  requirements, Sulfur oxides, Volatile
                                                    monitoring data for the 2010 SO2                        actions merely propose to approve state               organic compounds.
                                                    primary NAAQS based on the most                         law as meeting Federal requirements                     Authority: 42 U.S.C. 7401 et seq.
                                                    recent complete three-year period                       and do not impose additional
                                                    (2012–2014) design value period that                                                                            Dated: February 23, 2016.
                                                                                                            requirements beyond those imposed by
                                                    meets the clean data policy. As noted                   state law. For this reason, these                     Richard D. Buhl,
                                                    elsewhere, in the event that EPA does                   proposed actions:                                     Acting Regional Administrator, Region 8.
                                                    not finalize the proposed redesignation,                   • Are not significant regulatory                   [FR Doc. 2016–04900 Filed 3–4–16; 8:45 am]
                                                    EPA may choose to separately finalize                   actions subject to review by the Office               BILLING CODE 6560–50–P
                                                    the clean data determination, thereby                   of Management and Budget under
                                                    suspending the attainment planning-                     Executive Orders 12866 (58 FR 51735,
                                                    related requirements for the area.                      October 4, 1993) and 13563 (76 FR 3821,               DEPARTMENT OF TRANSPORTATION
                                                       In this action, the EPA is not                       January 21, 2011);
                                                    proposing to take any action on the                        • Do not impose an information                     Federal Railroad Administration
                                                    Billings/Laurel SO2 area that was the                   collection burden under the provisions
                                                    subject of a SIP Call (67 FR 22168, May                 of the Paperwork Reduction Act (44                    49 CFR Part 222
                                                    2, 2002) and for which EPA                              U.S.C. 3501 et seq.);
                                                                                                                                                                  [Docket No. FRA–2016–0010, Notice No. 1]
                                                    promulgated a FIP (77 FR 21418, April                      • Are certified as not having a
                                                    21, 2008) under the prior 24-hour SO2                   significant economic impact on a                      Use of Locomotive Horns at Public
                                                    primary NAAQS and the still-current                     substantial number of small entities                  Highway-Rail Grade Crossings; Notice
                                                    SO2 secondary NAAQS. EPA is also not                    under the Regulatory Flexibility Act (5               of Safety Inquiry
                                                    proposing any action to revoke the prior                U.S.C. 601 et seq.);
                                                    (1971) SO2 primary NAAQS in either                         • Do not contain any unfunded                      AGENCY: Federal Railroad
                                                    the 2010 Billings SO2 nonattainment                     mandate or significantly or uniquely                  Administration (FRA), Department of
                                                    area or the larger Billings/Laurel area                 affect small governments, as described                Transportation (DOT).
                                                    addressed by the May 2, 2002 SIP Call.                  in the Unfunded Mandates Reform Act                   ACTION: Notice of safety inquiry.
                                                    VI. Incorporation by Reference                          of 1995 (Pub. L. 104–4);
                                                                                                               • Do not have federalism implications              SUMMARY:   FRA is conducting a
                                                      In this rule, the EPA is proposing to                                                                       retrospective review of its locomotive
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                                                                                                            as specified in Executive Order 13132
                                                    include in a final EPA rule regulatory                  (64 FR 43255, August 10, 1999);                       train horn regulations in 49 CFR part
                                                    text that includes incorporation by                        • Are not economically significant                 222. As part of its review, FRA is
                                                    reference. In accordance with the                       regulatory actions based on health or                 soliciting public comment on whether
                                                    requirements of 1 CFR 51.5, the EPA is                  safety risks subject to Executive Order               FRA should modify, streamline, or
                                                    proposing to incorporate by reference                   13045 (62 FR 19885, April 23, 1997);                  expand any requirements of FRA’s
                                                    the Billings SO2 Redesignation and                         • Are not significant regulatory                   locomotive train horn regulations to
                                                    Maintenance Plan for action which are                   actions subject to Executive Order                    reduce paperwork and other economic
                                                    identified within this notice of proposed               13211 (66 FR 28355, May 22, 2001);                    burdens on the rail industry and States


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Document Created: 2018-02-02 15:07:49
Document Modified: 2018-02-02 15:07:49
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionProposed Rules
ActionProposed rule.
DatesComments must be received on or before April 6, 2016.
ContactAdam Clark, Air Program, U.S. Environmental Protection Agency, Region 8, Mailcode 8P-AR, 1595 Wynkoop, Denver, Colorado 80202-1129, (303) 312-7104, [email protected]
FR Citation81 FR 11727 
CFR AssociatedEnvironmental Protection; Air Pollution Control; Carbon Monoxide; Incorporation by Reference; Intergovernmental Relations; Lead; Nitrogen Dioxide; Ozone; Particulate Matter; Reporting and Recordkeeping Requirements; Sulfur Oxides and Volatile Organic Compounds

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