82_FR_794 82 FR 792 - Air Plan Approval; Ohio; Redesignation of the Ohio Portion of the Cincinnati-Hamilton, OH-IN-KY Area to Attainment of the 1997 Annual Standard for Fine Particulate Matter

82 FR 792 - Air Plan Approval; Ohio; Redesignation of the Ohio Portion of the Cincinnati-Hamilton, OH-IN-KY Area to Attainment of the 1997 Annual Standard for Fine Particulate Matter

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 82, Issue 2 (January 4, 2017)

Page Range792-805
FR Document2016-31635

The Environmental Protection Agency (EPA) is proposing to redesignate the Ohio portion of the Cincinnati-Hamilton, OH-IN-KY, nonattainment area (hereafter, ``the Cincinnati-Hamilton area'') to attainment for the 1997 fine particulate matter (PM<INF>2.5</INF>) annual national ambient air quality standards (NAAQS or standard). The Ohio portion of the Cincinnati-Hamilton area includes Butler, Clermont, Hamilton, and Warren Counties. Because EPA has determined that the Cincinnati-Hamilton area is attaining the annual PM<INF>2.5</INF> standard, EPA is proposing to redesignate the area to attainment and also proposing several additional related actions. EPA is proposing to approve the Reasonably Available Control Measures (RACM)-Reasonably Available Control Technology (RACT) portion of Ohio's Cincinnati- Hamilton area attainment plan SIP revision as providing adequate RACM/ RACT. EPA is proposing to approve an update to the Ohio state implementation plan (SIP), by updating the state's approved plan for maintaining the 1997 annual PM<INF>2.5</INF> NAAQS through 2027. EPA previously approved the base year emissions inventory for the Cincinnati-Hamilton area, and is proposing to approve Ohio's updated emission inventory which includes emission inventories for volatile organic compounds (VOCs) and ammonia. Ohio's approved maintenance plan submission includes a budget for the mobile source contribution of PM<INF>2.5</INF> and nitrogen oxides (NO<INF>X</INF>) to the Cincinnati-Hamilton Ohio PM<INF>2.5</INF> area for transportation conformity purposes, which EPA is proposing to approve and update. EPA is proposing to take these actions in accordance with the Clean Air Act (CAA) and EPA's implementation rule regarding the 1997 PM<INF>2.5</INF> NAAQS.

Federal Register, Volume 82 Issue 2 (Wednesday, January 4, 2017)
[Federal Register Volume 82, Number 2 (Wednesday, January 4, 2017)]
[Proposed Rules]
[Pages 792-805]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2016-31635]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[EPA-R05-OAR-2016-0479; FRL-9957-60-Region 5]


Air Plan Approval; Ohio; Redesignation of the Ohio Portion of the 
Cincinnati-Hamilton, OH-IN-KY Area to Attainment of the 1997 Annual 
Standard for Fine Particulate Matter

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
redesignate the Ohio portion of the Cincinnati-Hamilton, OH-IN-KY, 
nonattainment area (hereafter, ``the Cincinnati-Hamilton area'') to 
attainment for the 1997 fine particulate matter (PM2.5) 
annual national ambient air quality standards (NAAQS or standard). The 
Ohio portion of the Cincinnati-Hamilton area includes Butler, Clermont, 
Hamilton, and Warren Counties. Because EPA has determined that the 
Cincinnati-Hamilton area is attaining the annual PM2.5 
standard, EPA is proposing to redesignate the area to attainment and 
also proposing several additional related actions. EPA is proposing to 
approve the Reasonably Available Control Measures (RACM)-Reasonably 
Available Control Technology (RACT) portion of Ohio's Cincinnati-
Hamilton area attainment plan SIP revision as providing adequate RACM/
RACT. EPA is proposing to approve an update to the Ohio state 
implementation plan (SIP), by updating the state's approved plan for 
maintaining the 1997 annual PM2.5 NAAQS through 2027. EPA 
previously approved the base year emissions inventory for the 
Cincinnati-Hamilton area, and is proposing to approve Ohio's updated 
emission inventory which includes emission inventories for volatile 
organic compounds (VOCs) and ammonia. Ohio's approved maintenance plan 
submission includes a budget for the mobile source contribution of 
PM2.5 and nitrogen oxides (NOX) to the 
Cincinnati-Hamilton Ohio PM2.5 area for transportation 
conformity purposes, which EPA is proposing to approve and update. EPA 
is proposing to take these actions in accordance with the Clean Air Act 
(CAA) and EPA's implementation rule regarding the 1997 PM2.5 
NAAQS.

DATES: Comments must be received on or before February 3, 2017.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R05-
OAR-2016-0479 at http://www.regulations.gov, or via email to 
[email protected]. For comments submitted at Regulations.gov, 
follow the online instructions for submitting comments. Once submitted, 
comments cannot be edited or removed from Regulations.gov. For either 
manner of submission, EPA may publish any comment received to its 
public docket. Do not submit electronically any information you 
consider to be Confidential Business Information (CBI) or other 
information whose disclosure is restricted by statute. Multimedia 
submissions (audio, video, etc.) must be accompanied by a written 
comment. The written comment is considered the official comment and 
should include discussion of all points you wish to make. EPA will 
generally not consider comments or comment contents located outside of 
the primary submission (i.e. on the web, cloud, or other file sharing 
system). For additional submission methods, please contact the person 
identified in the ``For Further Information Contact'' section. For the 
full EPA public comment policy, information about CBI or multimedia 
submissions, and general guidance on making effective comments, please 
visit http://www2.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Joseph Ko, Environmental Engineer, 
Attainment Planning and Maintenance Section, Air Programs Branch (AR-
18J), Environmental Protection Agency, Region 5, 77 West Jackson 
Boulevard, Chicago, Illinois 60604, (312) 886-7947, [email protected].

SUPPLEMENTARY INFORMATION: This supplementary information section is 
arranged as follows:

Contents

I. Background
II. What are the criteria for redesignation to attainment?
III. What is EPA's analysis of the state's request?
    1. Attainment
    2. Section 110 and Part D Requirements, and Approval SIP under 
Section 110(k) (Section 107(d)(3)(E)(ii) and (v))
    3. Permanent and Enforceable Reductions in Emissions (Section 
107(d)(3)(E)(iii))
    4. Maintenance Plan Pursuant to Section 175A of the CAA (Section 
107(d)(3)(E)(iv))
    5. Motor Vehicle Emissions Budget (MVEBs) for the Mobile Source 
Contribution to PM2.5 and NOX
    6. Comprehensive Emissions Inventory
IV. EPA's Proposed Actions
V. Statutory and Executive Order Reviews

I. Background

    The first air quality standards for PM2.5 were 
promulgated on July 18, 1997, at 62 FR 38652. EPA promulgated an annual 
standard at a level of 15 micrograms per cubic meter ([micro]g/m\3\) of 
ambient air, based on a three-year average of the annual mean 
PM2.5 concentrations at each monitoring site.
    On January 5, 2005, at 70 FR 944, EPA published air quality area 
designations for the 1997 annual PM2.5 standard based on air 
quality data for calendar years 2001-2003. In that rulemaking, EPA 
designated the Cincinnati-Hamilton area (the Ohio portion being Butler, 
Clermont, Hamilton, and Warren Counties) as nonattainment for the 1997 
annual PM2.5 standard.
    In this proposed redesignation, EPA takes into account two 
decisions of the D.C. Circuit. On August 21, 2012, in EME Homer City 
Generation, L.P. v. EPA, 696 F.3d 7 (D.C. Cir. 2012), the D.C. Circuit 
vacated and remanded the Cross State Air Pollution Rule (CSAPR) and 
ordered EPA to continue administering the Clean Air Interstate Rule 
(CAIR) ``pending . . . development of a valid replacement.'' EME Homer 
City at 38. The D.C. Circuit denied all

[[Page 793]]

petitions for rehearing in the case on January 24, 2013. In the second 
decision, on January 4, 2013, the D.C. Circuit remanded to EPA the 
``Final Clean Air Fine Particle Implementation Rule'' (72 FR 20586, 
April 25, 2007) and the ``Implementation of the New Source Review (NSR) 
Program for Particulate Matter Less than 2.5 Micrometers 
(PM2.5)'' final rule (73 FR 28321, May 16, 2008). Natural 
Resources Defense Council v. EPA, 706 F.3d 428 (D.C. Cir. 2013).

II. What are the criteria for redesignation to attainment?

    The CAA sets forth the requirements for redesignating a 
nonattainment area to attainment. Specifically, section 107(d)(3)(E) of 
the CAA allows for redesignation provided that: (1) The Administrator 
determines that the area has attained the applicable NAAQS based on 
current air quality data; (2) the Administrator has fully approved an 
applicable SIP for the area under section 110(k) of the CAA; (3) the 
Administrator determines that the improvement in air quality is due to 
permanent and enforceable emission reductions resulting from 
implementation of the applicable SIP, Federal air pollution control 
regulations, or other permanent and enforceable emission reductions; 
(4) the Administrator has fully approved a maintenance plan for the 
area meeting the requirements of section 175A of the CAA; and (5) the 
state containing the area has met all requirements applicable to the 
area for purposes of redesignation under section 110 and part D of the 
CAA.

III. What is EPA's analysis of the state's request?

    EPA is proposing to redesignate the Ohio portion of the Cincinnati-
Hamilton area to attainment of the 1997 annual PM2.5 NAAQS, 
and is proposing to approve updates to Ohio's maintenance plan for the 
area and other related SIP revisions. EPA is also proposing to approve 
Ohio's RACM/RACT analysis. The bases for these proposed actions follow.

1. Attainment

    In accordance with section 179(c) of the CAA, 42 U.S.C. 7509(c) and 
40 CFR 51.1004(c), EPA is proposing to determine that the Cincinnati-
Hamilton area has attained the 1997 annual PM2.5 NAAQS. This 
proposed determination is based upon complete, quality-assured, and 
certified ambient air monitoring data for the 2013-2015 monitoring 
period that shows this area has monitored attainment of the 1997 
PM2.5 NAAQS.
    Under EPA's regulations at 40 CFR 50.7, the annual primary and 
secondary PM2.5 standards are met when the annual arithmetic 
mean concentration, as determined in accordance with 40 CFR part 50, 
appendix N, is less than or equal to 15.0 [micro]g/m\3\ at all relevant 
monitoring sites in the area.
    EPA has reviewed the ambient air quality monitoring data in the 
Cincinnati-Hamilton area, consistent with the provisions of 40 CFR part 
50, appendix T. EPA's review focused on data recorded in the EPA Air 
Quality System (AQS) database for the Cincinnati-Hamilton area for 
PM2.5 nonattainment area from 2013-2015.
    The Cincinnati-Hamilton area has nine monitors located in Butler 
(OH), Hamilton (OH), and Campbell (KY) Counties that reported design 
values from 2013-2015 for PM2.5 that ranged from 9.5 to 11.2 
[mu]g/m\3\ for the 1997 annual standard. The data are summarized shown 
in Table 1 below.
    There are three additional monitor sites in Butler County that are 
not listed in Table 1 because the data from these sites are not used 
for redesignation purposes. On October 31, 2014, EPA determined that 
site 39-017-0020 was located within the immediate area of several 
facilities, and that the monitoring data from the site would no longer 
be compared to the annual PM2.5 standard. On February 5, 
2015, monitor site 39-017-0022 in Bulter County became active, but 
since it is a ``special purpose monitor'', it cannot be used for 
comparison to the NAAQS before 24 months, per 40 CFR 58.20. 
Additionally, a new monitor site, 39-017-0016, became active in 2016 
but it was not included in Ohio's analysis because it does not yet have 
three years of valid data.
    All monitors in the Cincinnati-Hamilton area recorded complete data 
in accordance with criteria set forth by EPA in 40 CFR part 50 appendix 
N, where a complete year of air quality data comprises four calendar 
quarters, with each quarter containing data from at least 75% capture 
of the scheduled sampling days. Data available are considered to be 
sufficient for comparison to the NAAQS if three consecutive complete 
years of data exist. Recently the state certified data for 2013-2015 
show the area continues to attain the standard. Partial 2016 data for 
all relevant monitors also support a finding that the area continues to 
attain the standard.

               Table 1--Annual PM2.5 Design Values for the Cincinnati-Hamilton Area for 2013-2015
----------------------------------------------------------------------------------------------------------------
                                                                 Annual design values ([mu]g/m\3\)
                                                 ---------------------------------------------------------------
                   County/Site                                         Year                           Average
                                                 ---------------------------------------------------------------
                                                       2013            2014            2015          2013-2015
----------------------------------------------------------------------------------------------------------------
Butler, OH:
    39-017-0003.................................            11.1            11.3            10.3            10.9
    39-017-0016.................................            10.7            10.7             9.5            10.3
    39-017-0019.................................              11            11.2            10.2            10.8
Hamilton, OH:
    39-061-0006.................................            10.1            10.3             9.3             9.9
    39-061-0014.................................            11.6            11.3            10.7            11.2
    39-061-0040.................................            10.6            10.4             9.2            10.1
    39-061-0042.................................            11.5            11.2            10.1              11
    39-061-0010.................................            10.5            10.4             9.2              10
Campbell, KY:
    21-037-3002.................................             9.6             9.7           9.4 *             9.5
----------------------------------------------------------------------------------------------------------------
* less than 75% capture in one quarter at the primary monitor, but substitution using a secondary monitor was
  completed resulting in an AQS 'valid' design value.


[[Page 794]]

    Based on the information summarized above, EPA has found that the 
Cincinnati-Hamilton area has attained the 1997 annual PM2.5 
NAAQS.

2. Section 110 and Part D Requirements, and Approval SIP Under Section 
110(k) (Section 107(d)(3)(E)(ii) and (v))

    We have determined that, under section 110 of the CAA (general SIP 
requirements), Ohio has met all currently applicable SIP requirements 
for purposes of redesignation for the Cincinnati-Hamilton area. We are 
also proposing to find, in accordance with section 107(d)(3)(E)(v), 
that the Ohio submittal meets all SIP requirements currently applicable 
for purposes of redesignation under part D of title I of the CAA. In 
addition, we are proposing to find, in accordance with section 
107(d)(3)(E)(ii), that all applicable requirements of the Ohio SIP for 
purposes of redesignation have been approved. As discussed above, EPA 
previously approved Ohio's 2005 emissions inventory as meeting the 
section 172(c)(3) comprehensive emissions inventory requirement.
    In making these proposed determinations, we have ascertained which 
SIP requirements are applicable for purposes of redesignation, and 
concluded that the Ohio SIP includes measures meeting those 
requirements and that they are fully approved under section 110(k) of 
the CAA.
a. Section 110 General SIP Requirements
    Section 110(a) of title I of the CAA contains the general 
requirements for a SIP. Section 110(a)(2) provides that the 
implementation plan submitted by a state must have been adopted by the 
state after reasonable public notice and hearing, and, among other 
things, must: Include enforceable emission limitations and other 
control measures, means or techniques necessary to meet the 
requirements of the CAA; provide for establishment and operation of 
appropriate devices, methods, systems, and procedures necessary to 
monitor ambient air quality; provide for implementation of a source 
permit program to regulate the modification and construction of any 
stationary source within the areas covered by the plan; include 
provisions for the implementation of part C, Prevention of Significant 
Deterioration (PSD) and part D, NSR permit programs; include criteria 
for stationary source emission control measures, monitoring, and 
reporting; include provisions for air quality modeling; and provide for 
public and local agency participation in planning and emission control 
rule development.
    Section 110(a)(2)(D) of the CAA requires that SIPs contain measures 
to prevent sources in a state from significantly contributing to air 
quality problems in another state. EPA believes that the requirements 
linked with a particular nonattainment area's designation 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, we believe that these requirements should not 
be construed as the applicable requirements for purposes of 
redesignation.
    Further, we believe that the other section 110 elements described 
above that are not connected with nonattainment plan submissions and 
not linked with an area's attainment status are not applicable 
requirements for purposes of redesignation. A state remains subject to 
these requirements after an area is redesignated to attainment. We 
conclude that only the section 110 and part D requirements that are 
linked with a particular area's designation are the relevant measures 
which we may consider in evaluating a redesignation request. See 
Reading, Pennsylvania, proposed and final rulemakings (61 FR 53174-
53176, October 10, 1996) and (62 FR 24826, May 7, 1997); Cleveland-
Akron-Lorain, Ohio, final rulemaking (61 FR 20458, May 7, 1996); and 
Tampa, Florida, final rulemaking (60 FR 62748, December 7, 1995). See 
also the discussion on this issue in the Cincinnati, Ohio 1-hour ozone 
redesignation (65 FR 37890, June 19, 2000), and in the Pittsburgh, 
Pennsylvania 1-hour ozone redesignation (66 FR 50399, October 19, 
2001).
    We have reviewed the Ohio SIP and have concluded that it meets the 
general SIP requirements under section 110 of the CAA to the extent 
they are applicable for purposes of redesignation. EPA has previously 
approved provisions of Ohio's SIP addressing section 110 requirements 
(including provisions addressing particulate matter), at 40 CFR 
52.1870.
    On December 5, 2007, Ohio made a submittal addressing 
``infrastructure SIP'' elements required under CAA section 110(a)(2). 
EPA proposed approval of the December 5, 2007, submittal on April 28, 
2011, at 76 FR 23757 and published final approval on July 13, 2011, at 
76 FR 41075.
    The remaining parts of the infrastructure SIPs required by section 
110(a)(2) are not relevant to this redesignation, and are statewide 
requirements that are not linked to the PM2.5 nonattainment 
status of the Cincinnati-Hamilton area. Therefore, EPA believes that 
these SIP elements are not applicable requirements for purposes of 
review of the state's PM2.5 redesignation request.
b. Part D Requirements
    EPA has determined that, upon approval of the base year emissions 
inventories discussed in section III.6 of this rulemaking, the Ohio SIP 
will meet the applicable SIP requirements for the Cincinnati-Hamilton 
area applicable for purposes of redesignation under part D of the CAA. 
Subpart 1 of part D, found in sections 172-176 of the CAA, sets forth 
the basic nonattainment requirements applicable to all nonattainment 
areas. Subpart 4 of part D, found in sections 189 of the CAA, sets 
forth nonattainment requirements applicable for particulate matter 
nonattainment areas.
(i) RACM/RACT Requirements Under Section 172(c)(1)
    Section 172(c)(1) requires that each attainment plan ``provide for 
the implementation of all reasonably available control measures as 
expeditiously as practicable (including such reductions in emissions 
from the existing sources in the area as may be obtained through the 
adoption, at a minimum, of reasonably available control technology), 
and shall provide for attainment of the national primary ambient air 
quality standards.'' The PM2.5 Implementation Rule (72 FR 
20586) requires that the subpart 1 RACM portion of the attainment plan 
SIP revision include the list of potential measures that a state 
considered and additional information sufficient to show that the state 
has met all requirements for the determination of what constitutes RACM 
in a specific nonattainment area. See 40 CFR 51.1010(a). Any measures 
that are necessary to meet these requirements that are not already 
either federally promulgated, part of the SIP, or otherwise creditable 
in SIPs must be submitted in enforceable form as part of a state's 
attainment plan SIP revision for the area.
    In 1972, 1980, and 1991, Ohio promulgated RACM rules for 
particulate emissions from stationary sources. Ohio also has RACT rules 
found in OAC Chapter 3745-17. Lake Michigan Air Directors Consortium 
(LADCO), in consultation with two contractors, performed a series of 
studies exploring control measures for reducing both

[[Page 795]]

ozone precursors and PM2.5 precursors in Ohio, Illinois, 
Indiana, Michigan, and Wisconsin. Photochemical modeling was then 
conducted to assess the air quality benefits of the candidate control 
measures. In its attainment demonstration submitted on July 18, 2008, 
Ohio demonstrated that attainment would be achieved in the Cincinnati-
Hamilton area by 2009, based on the modeling conducted by the LADCO 
project team. Because of the projected 2009 attainment date, it would 
not have been reasonably possible or practicable for Ohio to develop 
RACM/RACT requirements, promulgate regulations and implement a control 
program prior to 2009. Ohio concluded that its RACM/RACT analysis, 
based on LADCO modeling, demonstrates that current control measures in 
Ohio satisfy RACM/RACT for the 1997 annual PM2.5 standard.
    EPA has reviewed Ohio's RACM/RACT analysis and agrees that it 
indicates that no other reasonably available measures were available, 
or necessary, to attain or advance attainment of the standard. Because 
Ohio has demonstrated with modeling that no further control measures 
would advance the attainment date in the area, EPA is proposing to 
approve Ohio's RACM/RACT portion of the attainment plan SIP revision as 
providing adequate RACM/RACT consistent with the provisions of 40 CFR 
51.1010(b).
    EPA previously redesignated the Cincinnati-Hamilton area to 
attainment for the 1997 annual PM2.5 standard, predicated in 
part on a finding that the RACM/RACT requirement (interpreted as 
reflecting those reasonable measures needed to attain the standard) was 
not an applicable requirement for purposes of redesignation of areas 
already meeting the standard. EPA has long interpreted that subpart 1 
nonattainment planning requirements, including RACM, are not 
``applicable for purposes of section 107(d)(3)(E)(ii) and (v) when an 
area is attaining the NAAQS, and, therefore, need not be approved into 
the SIP before EPA can redesignate the area. See 76 FR 80258.
    On July 14, 2015, the United States Court of Appeals for the Sixth 
Circuit (Sixth Circuit) issued an opinion in Sierra Club v. EPA, 793 
F.3d 656 (6th Cir. 2015), vacating EPA's redesignation of the Indiana 
and Ohio portions of the Cincinnati-Hamilton area to attainment for the 
1997 PM2.5 NAAQS on the basis that EPA had not approved 
subpart 1 RACM for the area into the SIP.\1\ The Sixth Circuit vacated 
the redesignation of the Ohio and Indiana portion of the area based on 
its view that RACM/RACT must be considered an applicable requirement 
for designation purposes. Consistent with that ruling, EPA is now 
finding that Ohio has satisfied this applicable requirement.
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    \1\ The Court issued its initial decision in the case on March 
18, 2015, and subsequently issued an amended opinion on July 14 
after appeals for rehearing en banc and panel rehearing had been 
filed. The amended opinion revised some of the legal aspects of the 
Court's analysis of the relevant statutory provisions (section 
107(d)(3)(E)(ii) and section 172(c)(1)), but the overall holding of 
the opinion was unaltered. On March 28, 2016, the Supreme Court 
denied a petition for certiorari from Ohio requesting review of the 
Sixth Circuit's decision.
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(ii) Other Section 172 Requirements
    For purposes of evaluating this redesignation request, the 
applicable section 172 SIP requirements for the Cincinnati-Hamilton 
area are contained in sections 172(c)(1)-(9). A thorough discussion of 
the requirements contained in section 172 can be found in the General 
Preamble for Implementation of Title I (57 FR 13498, April 16, 1992).
    Under section 172, states with nonattainment areas must submit 
plans providing for timely attainment and meeting a variety of other 
requirements. However, pursuant to 40 CFR 51.1004(c), EPA's 
determination that the area has attained the 1997 annual 
PM2.5 standard suspends the requirement to submit certain 
planning SIPs related to attainment, including: Attainment 
demonstration requirements, the RFP and attainment demonstration 
requirements of sections 172(c)(2) and (6) and 182(b)(1) of the CAA, 
and the requirement for contingency measures of section 172(c)(9) of 
the CAA.
    As a result, the only remaining requirements under section 172 to 
be considered are the emissions inventory requirement under section 
172(c)(3), and the RACM/RACT requirement of section 172(c)(1) per the 
6th circuit decision. As discussed previously, EPA is proposing to 
approve the VOCs and ammonia emissions inventories that Ohio submitted 
as satisfying the section 172(c)(3) requirement, and existing control 
measures as satisfying RACM/RACT requirements under section 172(c)(1).
    No SIP provisions applicable for redesignation of the Cincinnati-
Hamilton area are currently disapproved, conditionally approved, or 
partially approved. Ohio currently has a fully approved SIP for all 
requirements, as applicable for purposes of redesignation under the 
Sixth Circuit's Sierra Club decision.
    Section 172(c)(1) requires the plans for all nonattainment areas to 
provide for the implementation of RACM as expeditiously as practicable 
and to provide for attainment of the primary NAAQS. EPA interprets this 
requirement to impose a duty on all states to consider all available 
control measures for all nonattainment areas and to adopt and implement 
such measures as are reasonably available for implementation in each 
area as components of the area's attainment demonstration.
    As noted above in the previous section, the Sixth Circuit concluded 
that ``a State seeking redesignation `shall provide for the 
implementation' of RACM/RACT, even if those measures are not strictly 
necessary to demonstrate attainment with the PM2.5 NAAQS. . 
. . If a State has not done so, EPA cannot `fully approve[]' the area's 
SIP, and redesignation to attainment status is improper.'' Sierra Club, 
793 F.3d at 670.
    EPA is adhering to the Sixth Circuit's decision. Ohio has 
demonstrated that no further control measures would be necessary to 
advance the attainment date in the Cincinnati-Hamilton area, and EPA is 
proposing to approve existing control measures as satisfying RACM/RACT 
requirements under section 172(c)(1). A further discussion on RACM/RACT 
requirements can be found in the previous section entitled ``RACM/RACT 
Requirements Under Section 172(c)(1).''
    The reasonable further progress (RFP) requirement under section 
172(c)(2) is defined as progress that must be made toward attainment. 
This requirement is not relevant for purposes of the Cincinnati-
Hamilton redesignation because the area has monitored attainment of the 
1997 annual PM2.5 NAAQS. (General Preamble, 57 FR 13564). 
See also 40 CFR 51.918. The requirement to submit the section 172(c)(9) 
contingency measures is similarly not applicable for purposes of 
redesignation. Id.
    Section 172(c)(3) requires submission and approval of a 
comprehensive, accurate and current inventory of actual emissions. Ohio 
submitted a 2005 base year emissions inventory in the required 
attainment plan, and also updated the emissions inventory with VOCs and 
ammonia emissions from 2007. EPA previously approved the 2005 base year 
emissions inventory (76 FR 64825), and is proposing to approve the 
emissions inventory for VOCs and ammonia.
    Section 172(c)(4) requires the identification and quantification of 
allowable emissions for major new and modified stationary sources in an 
area, and section 172(c)(5) requires source permits for the 
construction and operation of new and modified major

[[Page 796]]

stationary sources anywhere in the nonattainment area. EPA approved 
Ohio's current NSR program on January 10, 2003 (68 FR 1366), but has 
not approved updates since that time. Nonetheless, since PSD 
requirements will apply after redesignation, the area need not have a 
fully-approved NSR program for purposes of redesignation, provided that 
the area demonstrates maintenance of the NAAQS without part D NSR. A 
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.'' Ohio has demonstrated that 
the Cincinnati-Hamilton area will be able to maintain the standard 
without part D NSR in effect; therefore, the state need not have a 
fully approved part D NSR program prior to approval of the 
redesignation request. The state's PSD program will become effective in 
the Cincinnati-Hamilton area upon redesignation to attainment. See 
rulemakings for Detroit, Michigan (60 FR 12467-12468, March 7, 1995); 
Cleveland-Akron-Lorain, Ohio (61 FR 20458, 20469-20470, May 7, 1996); 
Louisville, Kentucky (66 FR 53665, October 23, 2001); and Grand Rapids, 
Michigan (61 FR 31834-31837, June 21, 1996).
    Section 172(c)(6) requires the SIP to contain control measures 
necessary to provide for attainment of the standard. Because attainment 
has been reached, no additional measures are needed to provide for 
attainment.
    Section 172(c)(7) requires the SIP to meet the applicable 
provisions of section 110(a)(2). As noted above, we have found that 
Ohio's SIP meets the applicable requirements of section 110(a)(2) for 
purposes of redesignation.
(iii) Section 176 Conformity Requirements
    Section 176(c) of the CAA requires states to establish criteria and 
procedures to ensure that Federally-supported or funded activities, 
including highway projects, conform to the air quality planning goals 
in the applicable SIPs. The requirement to determine conformity applies 
to transportation plans, programs and projects developed, funded or 
approved under Title 23 of the U.S. Code and the Federal Transit Act 
(transportation conformity) as well as to all other Federally-supported 
or funded projects (general conformity). State transportation 
conformity regulations must be consistent with Federal conformity 
regulations relating to consultation, enforcement, and enforceability, 
which EPA promulgated pursuant to CAA requirements.
    EPA approved Ohio's transportation conformity SIPs on March 2, 2015 
(80 FR 11134). In April 2010, EPA promulgated changes to 40 CFR 51.851, 
eliminating the requirement for states to maintain a general conformity 
SIP. Following this promulgation, EPA granted Ohio's request to remove 
its general conformity regulations from the SIP. See 80 FR 29968. EPA 
confirms that Ohio has met the applicable conformity requirements under 
section 176.
(iv) Subpart 4
    On January 4, 2013, in Natural Resources Defense Council v. EPA, 
the D.C. Circuit remanded to EPA the ``Final Clean Air Fine Particle 
Implementation Rule'' (72 FR 20586, April 25, 2007) and the 
``Implementation of the New Source Review (NSR) Program for Particulate 
Matter Less than 2.5 Micrometers (PM2.5)'' final rule (73 FR 
28321, May 16, 2008) (collectively, ``1997 PM2.5 
Implementation Rule''). 706 F.3d 428 (D.C. Cir. 2013). The Court found 
that EPA erred in implementing the 1997 PM2.5 NAAQS pursuant 
to the general implementation provisions of subpart 1 of part D of 
title I of the CAA, rather than the particulate-matter-specific 
provisions of subpart 4 of part D of title I.
    EPA has longstanding general guidance that interprets the 1990 
amendments to the CAA, making recommendations to states for meeting the 
statutory requirements for SIPs for nonattainment areas. See, ``State 
Implementation Plans; General Preamble for the Implementation of Title 
I of the Clear Air Act Amendments of 1990,'' 57 FR 13498 (April 16, 
1992) (the ``General Preamble''). In the General Preamble, EPA 
discussed the relationship of subpart 1 and subpart 4 SIP requirements, 
and pointed out that subpart 1 requirements were, to an extent, 
``subsumed by, or integrally related to, the more specific PM-10 
requirements.'' 57 FR 13538 (April 16, 1992). The subpart 1 
requirements include, among other things, provisions for attainment 
demonstrations, RACM, RFP, emissions inventories, and contingency 
measures.
    For the purposes of this redesignation, in order to identify any 
additional requirements which would apply under subpart 4, we are 
considering the Cincinnati-Hamilton area to be a ``moderate'' 
PM2.5 nonattainment area. Under section 188 of the CAA, all 
areas designated nonattainment areas under subpart 4 would initially be 
classified by operation of law as ``moderate'' nonattainment areas, and 
would remain moderate nonattainment areas unless and until EPA 
reclassifies the area as a ``serious'' nonattainment area. Accordingly, 
EPA believes that it is appropriate to limit the evaluation of the 
potential impact of subpart 4 requirements to those that would be 
applicable to moderate nonattainment areas.
    Section 189(a) and (c) of subpart 4 applies to moderate 
nonattainment areas and includes the following: (1) An approved permit 
program for construction of new and modified major stationary sources 
(section 189(a)(1)(A)); (2) an attainment demonstration (section 
189(a)(1)(B)); (3) provisions for RACM (section 189(a)(1)(C)); and (4) 
quantitative milestones demonstrating RFP toward attainment by the 
applicable attainment date (section 189(c)).
    The permit requirements of subpart 4, as contained in section 
189(a)(1)(A), refer to and apply the subpart 1 permit provisions 
requirements of sections 172 and 173 to PM10, without adding 
to them. Consequently, EPA believes that section 189(a)(1)(A) does not 
itself impose for redesignation purposes any additional requirements 
for moderate areas beyond those contained in subpart 1.\2\ In any 
event, in the context of redesignation, EPA has long relied on the 
interpretation that a fully approved nonattainment new source review 
program is not considered an applicable requirement for redesignation, 
provided the area can maintain the standard with a PSD program after 
redesignation. A 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.'' See 
also rulemakings for Detroit, Michigan (60 FR 12467-12468, March 7, 
1995); Cleveland-Akron-Lorain, Ohio (61 FR 20458, 20469-20470, May 7, 
1996); Louisville, Kentucky (66 FR 53665, October 23, 2001); and Grand 
Rapids, Michigan (61 FR 31834-31837, June 21, 1996).
---------------------------------------------------------------------------

    \2\ The potential effect of section 189(e) on section 
189(a)(1)(A) for purposes of evaluating this redesignation is 
discussed below.
---------------------------------------------------------------------------

    With respect to the specific attainment planning requirements under 
subpart 4,\3\ when EPA evaluates a redesignation request under subpart 
1 and/or 4, any area that is attaining the PM2.5 standard is 
viewed as having satisfied the attainment planning

[[Page 797]]

requirements for these subparts. For redesignations, EPA has for many 
years interpreted attainment-linked requirements as not applicable for 
areas attaining the standard. In the General Preamble, EPA stated that:
---------------------------------------------------------------------------

    \3\ I.e., attainment demonstration, RFP, RACM, milestone 
requirements, contingency measures.

The requirements for RFP will not apply in evaluating a request for 
redesignation to attainment since, at a minimum, the air quality 
data for the area must show that the area has already attained. 
Showing that the State will make RFP towards attainment will, 
---------------------------------------------------------------------------
therefore, have no meaning at that point.

``General Preamble for the Interpretation of Title I of the CAA 
Amendments of 1990''; (57 FR 13498, 13564, April 16, 1992).
    The General Preamble also explained that:

[t]he section 172(c)(9) requirements are directed at ensuring RFP 
and attainment by the applicable date. These requirements no longer 
apply when an area has attained the standard and is eligible for 
redesignation. Furthermore, section 175A for maintenance plans . . . 
provides specific requirements for contingency measures that 
effectively supersede the requirements of section 172(c)(9) for 
these areas.

Id.
    EPA similarly stated in its September 4, 1992 Calcagni memorandum 
(Calcagni memorandum) that, ``[t]he requirements for reasonable further 
progress and other measures needed for attainment will not apply for 
redesignations because they only have meaning for areas not attaining 
the standard.''
    Elsewhere in this action, EPA proposes to determine that the area 
has attained the 1997 annual PM2.5 standard. Under its 
longstanding interpretation, EPA is proposing to determine here that 
the area meets the attainment-related plan requirements of subparts 1 
and 4. Thus, EPA is proposing to conclude that the requirements to 
submit an attainment demonstration under 189(a)(1)(B), a RACM 
determination under sections 172(c)(1) and 189(a)(1)(c), a RFP 
demonstration under section 189(c)(1), and contingency measure 
requirements under section 172(c)(9) are satisfied for purposes of 
evaluating the redesignation request.
    PM2.5 pollution can be emitted directly from a source 
(primary PM2.5) or formed secondarily through chemical 
reactions in the atmosphere involving precursor pollutants emitted from 
a variety of sources. Sulfates are a type of secondary particulate 
formed from SO2 emissions from power plants and industrial 
facilities. Nitrates, another common type of secondary particulate, are 
formed from combustion emissions of NOX from power plants, 
mobile sources, and other combustion sources.
    CAA section 189(e) specifically provides that control requirements 
for major stationary sources of direct PM10 shall also apply 
to PM10 precursors from those sources, except where EPA 
determines that major stationary sources of such precursors ``do not 
contribute significantly to PM10 levels which exceed the 
standard in the area.''
    For a number of reasons, EPA believes that this proposed 
redesignation of the Cincinnati-Hamilton area is consistent with the 
Court's decision on this aspect of subpart 4. First, while the Court, 
citing section 189(e), stated that ``for a PM10 area 
governed by subpart 4, a precursor is `presumptively regulated,' '' the 
Court expressly declined to decide the specific challenge to EPA's 1997 
PM2.5 implementation rule provisions regarding ammonia and 
VOCs as precursors. The Court had no occasion to reach whether and how 
it was substantively necessary to regulate any specific precursor in a 
particular PM2.5 nonattainment area, and did not address 
what might be necessary for purposes of acting upon a redesignation 
request.
    The Cincinnati-Hamilton area has attained the standard without any 
specific additional controls of VOCs and ammonia emissions from any 
sources in the area.
    Precursors in subpart 4 are specifically regulated under the 
provisions of section 189(e), which requires, with important 
exceptions, control requirements for major stationary sources of 
PM10 precursors.\4\ As explained below, we do not believe 
that any additional controls of ammonia and VOCs are required in the 
context of this redesignation.
---------------------------------------------------------------------------

    \4\ Under either subpart 1 or subpart 4, for purposes of 
demonstrating attainment as expeditiously as practicable, a state is 
required to evaluate all economically and technologically feasible 
control measures for direct PM emissions and precursor emissions, 
and adopt those measures that are deemed reasonably available.
---------------------------------------------------------------------------

    In the General Preamble, EPA discusses its approach to implementing 
section 189(e). See 57 FR 13538-13542. With regard to precursor 
regulation under section 189(e), the General Preamble explicitly stated 
that control of VOCs under other CAA requirements may suffice to 
relieve a state from the need to adopt precursor controls under section 
189(e) (57 FR 13542). EPA proposes to determine that Ohio has met the 
provisions of section 189(e) with respect to ammonia and VOCs as 
precursors. This proposed supplemental determination is based on our 
findings that: (1) The Cincinnati-Hamilton area contains no major 
stationary sources of ammonia, and (2) existing major stationary 
sources of VOCs are adequately controlled under other provisions of the 
CAA regulating the ozone NAAQS.\5\ In the alternative, EPA proposes to 
determine that, under the express exception provisions of section 
189(e), and in the context of the redesignation of the area, which is 
attaining the 1997 annual PM2.5 standard, at present ammonia 
and VOCs precursors from major stationary sources do not contribute 
significantly to levels exceeding the 1997 PM2.5 standard in 
the Cincinnati-Hamilton area. See 57 FR 13539-42.
---------------------------------------------------------------------------

    \5\ The Cincinnati-Hamilton area has reduced VOC emissions 
through the implementation of various SIP approved VOC control 
programs and various on-road and nonroad motor vehicle control 
programs.
---------------------------------------------------------------------------

    EPA notes that its 1997 PM2.5 implementation rule 
provisions in 40 CFR 51.1002 were not directed at evaluation of 
PM2.5 precursors in the context of redesignation, but at SIP 
plans and control measures required to bring a nonattainment area into 
attainment of the 1997 annual PM2.5 NAAQS. By contrast, 
redesignation to attainment primarily requires the area to have already 
attained due to permanent and enforceable emission reductions, and to 
demonstrate that controls in place can continue to maintain the 
standard. Thus, even if we regard the Court's January 4, 2013, decision 
as calling for ``presumptive regulation'' of ammonia and VOCs for 
PM2.5 under the attainment planning provisions of subpart 4, 
those provisions do not require additional controls of these precursors 
for an area that already qualifies for redesignation. Nor does EPA 
believe that requiring Ohio to address precursors differently than it 
has already would result in a different redesignation outcome.
    Although, as EPA has emphasized, its consideration here of 
precursor requirements under subpart 4 is in the context of a 
redesignation to attainment, EPA's existing interpretation of subpart 4 
requirements with respect to precursors in attainment plans for 
PM10 contemplates that states may develop attainment plans 
that regulate only those precursors that are necessary for purposes of 
attainment in the area in question, i.e., states may determine that 
only certain precursors need be regulated for attainment and control 
purposes.\6\ Courts have upheld this

[[Page 798]]

approach to the requirements of subpart 4 for PM10.\7\ EPA 
believes that application of this approach to PM2.5 
precursors under subpart 4 is reasonable. Because the Cincinnati-
Hamilton area has already attained the 1997 annual PM2.5 
NAAQS with its current approach to regulation of PM2.5 
precursors, EPA believes that, in the context of this redesignation, 
there is no need to revisit the attainment control strategy with 
respect to the treatment of precursors. Even if the Court's decision is 
construed to impose an obligation to consider additional precursors 
under subpart 4 in evaluating this redesignation request, it would not 
affect EPA's approval here of Ohio's request for redesignation of the 
Cincinnati-Hamilton area. Moreover, the state has shown, and EPA is 
proposing to determine, that attainment in this area is due to 
permanent and enforceable emissions reductions on all precursors 
necessary to provide for continued attainment. It follows that no 
further control of additional precursors is necessary. Accordingly, EPA 
does not view the January 4, 2013, Court decision as precluding 
redesignation of the Cincinnati-Hamilton area to attainment for the 
1997 PM2.5 NAAQS at this time.
---------------------------------------------------------------------------

    \6\ See, e.g., ``Approval and Promulgation of Implementation 
Plans for California--San Joaquin Valley PM-10 Nonattainment Area; 
Serious Area Plan for Nonattainment of the 24-Hour and Annual PM-10 
Standards,'' 69 FR 30006 (May 26, 2004) (approving a PM10 
attainment plan that impose controls on direct PM10 and 
NOX emissions and did not impose controls on 
SO2, VOC, or ammonia emissions).
    \7\ See, e.g., Assoc. of Irritated Residents v. EPA et al., 423 
F.3d 989 (9th Cir. 2005).
---------------------------------------------------------------------------

    EPA concludes that the area has met all applicable requirements for 
purposes of redesignation in accordance with section 107(d)(3)(E)(ii) 
and (v).
c. Fully Approved Applicable SIP Under Section 110(k) of the CAA
    Upon final approval of Ohio's comprehensive VOCs and ammonia 
emissions inventories, EPA will have fully approved the Ohio SIP for 
the Cincinnati-Hamilton area under section 110(k) of the CAA for all 
requirements applicable for purposes of redesignation. EPA may rely on 
prior SIP approvals in approving a redesignation request (See page 3 of 
the Calcagni memorandum; Southwestern Pennsylvania Growth Alliance v. 
Browner, 144 F.3d 984, 989-990 (6th Cir. 1998); Wall v. EPA, 265 F.3d 
426 (6th Cir. 2001)) plus any additional measures it may approve in 
conjunction with a redesignation action. See 68 FR 25413, 25426 (May 
12, 2003). Since the passage of the CAA of 1970, Ohio has adopted and 
submitted, and EPA has fully approved, provisions addressing various 
required SIP elements under particulate matter standards. In this 
action, EPA is approving Ohio's VOCs and ammonia comprehensive 
emissions inventories for the Cincinnati-Hamilton area as meeting the 
requirement of section 172(c)(3) of the CAA.

3. Permanent and Enforceable Reductions in Emissions (Section 
107(d)(3)(E)(iii))

    EPA believes that Ohio has demonstrated that the observed air 
quality improvement in the Cincinnati-Hamilton area is due to permanent 
and enforceable reductions in emissions resulting from implementation 
of the SIPs, Federal measures, and other state-adopted measures.
    In making this demonstration, Ohio has calculated the change in 
emissions between 2005, one of the years used to designate the area as 
nonattainment, and 2008, one of the years the Cincinnati-Hamilton area 
monitored attainment. The reduction in emissions and the corresponding 
improvement in air quality over this time period can be attributed to a 
number of regulatory control measures that the Cincinnati-Hamilton area 
and contributing areas have implemented, as discussed below.
a. Permanent and Enforceable Controls Implemented
    The following is a discussion of permanent and enforceable measures 
that have been implemented in the area:
i. Federal Emission Control Measures
    Reductions in direct emissions of PM2.5 and in emissions 
of PM2.5 precursors have occurred statewide and in upwind 
areas as a result of Federal emission control measures, with additional 
emission reductions expected to occur in the future. Federal emission 
control measures include the following.
    Tier 2 Emission Standards for Vehicles and Gasoline Sulfur 
Standards. EPA finalized this Federal rule in February 2000. These 
emission control requirements result in lower NOX and 
SO2 emissions from new cars and light duty trucks, including 
sport utility vehicles. Emission standards established under EPA's 
rules became effective between 2004 and 2009. EPA has estimated that, 
emissions of NOX from new vehicles have decreased by the 
following percentages: Passenger cars (light duty vehicles)--77 
percent; light duty trucks, minivans, and sports utility vehicles--86 
percent; and, larger sports utility vehicles, vans, and heavier 
trucks--69 to 95 percent. EPA expects fleet-wide average emissions to 
decline by similar percentages as new vehicles replace older vehicles. 
The Tier 2 standards also reduced the sulfur content of gasoline by up 
to 90 percent. VOCs emissions reductions will be approximately 12 
percent for passenger cars; 18 percent for smaller SUVs, light trucks, 
and minivans; and 15 percent for larger SUVs, vans, and heavier trucks.
    Heavy-Duty Diesel Engine Rule. EPA issued this rule in July 2000. 
This rule, which was phased in between 2004 and 2007, includes 
standards limiting the sulfur content of diesel fuel. This rule is 
estimated to reduce NOX emissions from diesel trucks and 
buses by approximately 40 percent. The level of sulfur in highway 
diesel fuel is also estimated to have dropped by 97 percent by mid-2006 
due to this rule.
    Nonroad Diesel Rule. In May 2004, EPA promulgated a new rule for 
large nonroad diesel engines, such as those used in construction, 
agriculture, and mining equipment, to be phased in between 2008 and 
2014. Prior to 2006, nonroad diesel fuel averaged approximately 3,000 
ppm sulfur. This rule limited nonroad diesel sulfur content to 15 ppm 
by 2010. It is estimated that compliance with this rule has cut 
emissions from nonroad diesel engines by more than 90%. This rule 
achieved some emission reductions by 2008 and was fully implemented by 
2010. The reduction in fuel sulfur content also yielded an immediate 
reduction in sulfate particle emissions from all diesel vehicles.
ii. Control Measures in Contributing Areas
    Given the significance of sulfates and nitrates in the Cincinnati-
Hamilton area, the area's air quality is strongly affected by regulated 
emissions from power plants.
    NOX SIP Call. On October 27, 1998 (63 FR 57356), EPA issued a 
NOX SIP Call requiring the District of Columbia and 22 
states to reduce emissions of NOX. Affected states were 
required to comply with Phase I of the SIP Call beginning in 2004, and 
Phase II beginning in 2007. Emission reductions resulting from 
regulations developed in response to the NOX SIP Call are 
permanent and enforceable.
    CAIR and CSAPR. EPA proposed CAIR on January 30, 2004, at 69 FR 
4566, promulgated CAIR on May 12, 2005, at 70 FR 25162, and promulgated 
associated Federal Implementation Plans (FIPs) on April 28, 2006, at 71 
FR 25328, in order to reduce SO2 and NOX 
emissions and improve air quality in many areas across the Eastern 
United States. However, on July 11, 2008, the United States Court of 
Appeals for the District of Columbia Circuit (D.C. Circuit or Court) 
issued its decision to vacate and remand both CAIR and the associated 
CAIR FIPs in their entirety (North Carolina v. EPA, 531 F.3d 836 (D.C. 
Cir. 2008)). EPA petitioned for a

[[Page 799]]

rehearing, and the Court issued an order remanding CAIR and the CAIR 
FIPs to EPA without vacatur (North Carolina v. EPA, 550 F.3d 1176 (D.C. 
Cir. 2008)). The Court, thereby, left CAIR in place in order to 
``temporarily preserve the environmental values covered by CAIR'' until 
EPA replaced it with a rule consistent with the Court's opinion (id. at 
1178). The Court directed EPA to ``remedy CAIR's flaws'' consistent 
with the July 11, 2008, opinion, but declined to impose a schedule on 
EPA for completing this action (id).
    On August 8, 2011 (76 FR 48208), acting on the D.C. Circuit's 
remand, EPA promulgated CSAPR to replace CAIR and, thus, to address the 
interstate transport of emissions contributing to nonattainment and 
interfering with maintenance of the two air quality standards covered 
by CAIR as well as the 2006 PM2.5 NAAQS. CSAPR requires 
substantial reductions of SO2 and NOX emissions 
from electric generating units (EGUs) in 28 states in the eastern 
United States. As a general matter, because CSAPR is CAIR's 
replacement, emissions reductions associated with CAIR will for most 
areas be made permanent and enforceable through implementation of 
CSAPR.
    Numerous parties filed petitions for review of CSAPR in the D.C. 
Circuit, and on August 21, 2012, the court issued its ruling, vacating 
and remanding CSAPR to EPA and ordering continued implementation of 
CAIR. EME Homer City Generation, L.P. v. EPA, 696 F.3d 7, 38 (D.C. Cir. 
2012). The D.C. Circuit's vacatur of CSAPR was reversed by the United 
States Supreme Court on April 29, 2014, and the case was remanded to 
the D.C. Circuit to resolve remaining issues in accordance with the 
high court's ruling. EPA v. EME Homer City Generation, L.P., 134 S. Ct. 
1584 (2014).
    On remand, the D.C. Circuit affirmed CSAPR in most respects, but 
invalidated without vacating some of the CSAPR budgets as to a number 
of states. EME Homer City Generation, L.P. v. EPA, 795 F.3d 118 (D.C. 
Cir. 2015) (EME Homer City II). The litigation over CSAPR ultimately 
delayed implementation of that rule for three years, from January 1, 
2012, when CSAPR's cap-and-trade programs were originally scheduled to 
replace the CAIR cap-and-trade programs, to January 1, 2015. CSAPR's 
Phase 2 budgets were originally promulgated to begin on January 1, 
2014, and are now scheduled to begin on January 1, 2017. As part of the 
remand, the D.C. Circuit found the Ohio 2014 NOX budget was 
invalid, stating that based on EPA's own data, Ohio made no 
contribution to downwind states' nonattainment. On November 16, 2015, 
EPA proposed the CSAPR Update Rule (80 FR 75706) which, when finalized, 
will establish permanent and enforceable reduction through revised 
NOX ozone season budgets for Ohio.
    Because the emission reduction requirements of CAIR were 
enforceable through the 2011 control period, and because CSAPR has been 
promulgated to address the requirements previously addressed by CAIR 
and will achieve similar or greater reductions once finalized, EPA has 
determined that the EGU emission reductions that helped lead to 
attainment in the Cincinnati-Hamilton area can now be considered 
permanent and enforceable and that the requirement of CAA section 
107(d)(3)(E)(iii) has been met.
b. Emission Reductions
    Ohio developed an emissions inventory for NOX, direct 
PM2.5, and SO2 for 2005, one of the years used to 
designate the area as nonattainment, and 2008, one of the years the 
Cincinnati-Hamilton area monitored attainment of the standard.
    Emissions of SO2 and NOX from EGUs were 
derived from EPA's Clean Air Market's acid rain database. These 
emissions reflect Ohio's NOX emission budgets resulting from 
EPA's NOX SIP call. The 2008 emissions from EGUs reflect 
Ohio's emission caps under CAIR. All other point source emissions were 
obtained from Ohio's source facility emissions reporting.
    Area source emissions for the Cincinnati-Hamilton area for 2005 
were taken from periodic emissions inventories.\8\ These 2005 area 
source emission estimates were extrapolated to 2008. Source growth 
factors were supplied by LADCO. These growth factors were based on the 
U.S Department of Commerce Bureau of Economic Analysis (BEA) growth 
factors, with some updated local information.
---------------------------------------------------------------------------

    \8\ Periodic emission inventories are derived by states every 
three years and reported to EPA. These periodic emission inventories 
are required by the Federal Consolidated Emissions Reporting Rule, 
codified at 40 CFR Subpart A. EPA revised these and other emission 
reporting requirements in a final rule published on December 17, 
2008, at 73 FR 76539.
---------------------------------------------------------------------------

    Nonroad mobile source emissions were extrapolated from nonroad 
mobile source emissions reported in EPA's 2005 National Emissions 
Inventory (NEI). Contractors were employed by LADCO to estimate 
emissions for commercial marine vessels and railroads.
    On-road mobile source emissions were calculated using EPA's mobile 
source emission factor model, MOVES2010, in conjunction with 
transportation model results developed by the Ohio-Kentucky-Indiana 
Regional Council of Governments (OKI).
    All emissions estimates discussed below were documented in the 
submittals and appendices to Ohio's redesignation request submittal of 
July 22, 2016. For these data and additional emissions inventory data, 
the reader is referred to EPA's digital docket for this rule, http://www.regulations.gov, for docket number EPA-R05-OAR-2016-0479, which 
includes a digital copy of Ohio's submittal.
    Emissions data in tons per year (tpy) for the Cincinnati-Hamilton 
area are shown in Tables 2, 3, and 4 below.

 Table 2--Comparison of 2005 Emissions From the Nonattainment Year and 2008 Emissions for an Attainment Year for
                                       NOX in the Cincinnati-Hamilton Area
 
----------------------------------------------------------------------------------------------------------------
                                                                                                   Net change
                          Sector                                  2005              2008           (2008-2005)
----------------------------------------------------------------------------------------------------------------
EGU Point.................................................         55,930.44         46,853.89         -9,076.55
Non-EGU...................................................         10,371.70          9,790.50           -581.20
Non-road..................................................         12,417.57         10,561.92         -1,855.65
Other (Area)..............................................          7,810.74          7,975.67            164.93
Marine, Air, and Rail (MAR)...............................          9,352.60          9,052.95           -299.65
On-road...................................................         71,919.89         64,471.22         -7,448.67
                                                           -----------------------------------------------------

[[Page 800]]

 
    Total.................................................        167,802.94        148,706.15        -19,096.79
----------------------------------------------------------------------------------------------------------------


 Table 3--Comparison of 2005 Emissions From the Nonattainment Year and 2008 Emissions for an Attainment Year for
                                       SO2 in the Cincinnati-Hamilton Area
 
----------------------------------------------------------------------------------------------------------------
                                                                                                   Net change
                          Sector                                  2005              2008           (2008-2005)
----------------------------------------------------------------------------------------------------------------
EGU Point.................................................        218,395.56         98,334.17       -120,061.39
Non-EGU...................................................         15,532.09         13,483.92         -2,048.17
Non-road..................................................          1,057.16            416.87           -640.29
Area......................................................          3,494.39          3,520.77             26.38
MAR.......................................................          1,092.58            982.82           -109.76
On-road...................................................            392.00            277.59           -114.41
                                                           -----------------------------------------------------
    Total.................................................        239,963.78        117,016.14       -122,947.64
----------------------------------------------------------------------------------------------------------------


 Table 4--Comparison of 2005 Emissions From the Nonattainment Year and 2008 Emissions for an Attainment Year for
                                  Direct PM2.5 in the Cincinnati-Hamilton Area
 
----------------------------------------------------------------------------------------------------------------
                                                                                                   Net change
                          Sector                                  2005              2008           (2008-2005)
----------------------------------------------------------------------------------------------------------------
EGU Point.................................................          2,062.91          1,633.15           -429.76
Non-EGU...................................................          1,352.79          1,458.52            105.73
Non-road..................................................            984.35            853.89           -130.46
Area......................................................          1,828.85          1,864.80             35.95
MAR.......................................................            416.20            414.43             -1.77
On-road...................................................          2,810.30          2,679.85           -130.45
                                                           -----------------------------------------------------
    Total.................................................          9,455.40          8,904.64           -550.76
----------------------------------------------------------------------------------------------------------------

    Table 2 shows reductions in NOX emissions for the 
Cincinnati-Hamilton area by 19,096.79 tpy between 2005 (nonattainment 
year) and 2008 (attainment year). Table 3 shows that the Cincinnati-
Hamilton area reduced SO2 emissions by 122,947.64 tpy 
between 2005 and 2008. Table 4 shows reductions in direct 
PM2.5 emissions for the Cincinnati-Hamilton area by 550.76 
tpy between 2005 and 2008.
4. Maintenance Plan Pursuant to Section 175A of the CAA (Section 
107(d)(3)(E)(iv))
    EPA has fully approved an applicable maintenance plan that meets 
the requirements of section 175(a) on December 23, 2011. See 76 FR 
80253. In conjunction with Ohio's request to redesignate the 
Cincinnati-Hamilton nonattainment area to attainment, Ohio has 
submitted an updated attainment inventory of the maintenance plan to 
reflect the provisions of subpart 4 (Title I, Part D) of the CAA, and 
EPA is updating the maintenance plan to 2027.
a. What is required in a maintenance plan?
    Section 175A of the CAA sets forth the required 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 ten years after EPA 
approves a redesignation to attainment. Eight years after 
redesignation, the state must submit a revised maintenance plan which 
demonstrates that attainment will continue to be maintained for ten 
years following the initial ten year maintenance period. To address the 
possibility of future NAAQS violations, the maintenance plan must 
contain contingency measures with a schedule for implementation as EPA 
deems necessary to assure prompt correction of any future 
PM2.5 violations.
    The Calcagni memorandum provides additional guidance on the content 
of a maintenance plan. The memorandum states that a maintenance plan 
should address the following items: The attainment emissions inventory, 
a maintenance demonstration showing maintenance for the ten years of 
the maintenance period, a commitment to maintain the existing 
monitoring network, factors and procedures to be used for verification 
of continued attainment of the NAAQS, and a contingency plan to prevent 
or correct future violations of the NAAQS.
    Section 175A requires a state seeking redesignation to attainment 
to submit a SIP revision to provide for the maintenance of the NAAQS in 
the area ``for at least 10 years after the redesignation.'' EPA has 
interpreted this as a showing of maintenance ``for a period of ten 
years following redesignation.'' Calcagni memorandum, p. 9. Where the 
emissions inventory method of showing maintenance is used, its purpose 
is to show that emissions during the maintenance period will not 
increase over the

[[Page 801]]

attainment year inventory. Calcagni memorandum, pp. 9-10.
    As discussed in detail in the section below, the state's 
maintenance plan submission expressly documents that the area's 
emissions inventories will remain below the attainment year inventories 
through 2021. In addition, for the reasons set forth below, EPA 
believes that the state's submission, in conjunction with additional 
supporting information, further demonstrates that the area will 
continue to maintain the 1997 annual SO2 NAAQS at least 
through 2027. Thus, any EPA action to finalize its proposed approval of 
the redesignation request and maintenance plans in 2017, will be based 
on a showing, in accordance with section 175A, that the state's 
maintenance plan provides for maintenance for at least ten years after 
redesignation.
b. Attainment Inventory
    Ohio developed an emissions inventory for NOX, direct 
PM2.5, and SO2 for 2008, one of the years in the 
period during which the Cincinnati-Hamilton area monitored attainment 
of the 1997 annual PM2.5 standard, as described previously. 
The attainment level of emissions is summarized in Tables 2, 3, and 4, 
above. Ohio also included emissions inventories for VOCs and ammonia 
from 2007, in accordance with the provisions of Subpart 4 (Title I, 
Part D) of the CAA. These emissions are summarized in Table 6, in 
discussion of the maintenance plan below.
c. Demonstration of Maintenance
    Ohio has a fully approved maintenance plan that meets the 
requirements of Section 175(A). See 76 FR 80253. Along with the 
redesignation request, Ohio submitted an updated attainment inventory 
to reflect the provision of subpart 4. Ohio's plan demonstrates 
maintenance of the 1997 annual PM2.5 standard through 2021 
by showing that current and future emissions of NOX, 
directly emitted PM2.5 and SO2 in the area remain 
at or below attainment year emission levels. Section 175A requires a 
state seeking redesignation to attainment to submit a SIP revision to 
provide for the maintenance of the NAAQS in the area ``for at least 10 
years after the redesignation.'' EPA has interpreted this as a showing 
of maintenance ``for a period of ten years following redesignation.'' 
Calcagni memorandum, p. 9. Where the emissions inventory method of 
showing maintenance is used, its purpose is to show that emissions 
during the maintenance period will not increase over the attainment 
year inventory. Calcagni memorandum, pp. 9-10.
    As discussed in detail in the section below, Ohio's maintenance 
plan expressly documents that the area's emissions inventories will 
remain below the attainment year inventories through 2021. In addition, 
for the reasons set forth below, EPA believes that the state's 
submission, in conjunction with additional supporting information, 
further demonstrates that the area will continue to maintain the 
PM2.5 standard at least through 2027. Thus, if EPA finalizes 
its proposed approval of the redesignation request in 2017, it will be 
based on a showing, in accordance with section 175A, that the state's 
maintenance plan provides for maintenance for at least ten years after 
redesignation.
    Ohio's plan demonstrates maintenance of the 1997 annual 
PM2.5 NAAQS through 2021 by showing that current and future 
emissions of NOX, directly emitted PM2.5 and 
SO2 for the area remain at or below attainment year emission 
levels.
    The rate of decline in emissions of PM2.5, 
NOX, and SO2 from the attainment year 2008 
through 2021 indicates that the emissions inventory levels not only 
significantly decline between 2008 and 2021, but also will continue to 
decline through 2027 and beyond. PM2.5 emissions in the 
nonattainment area are projected to decrease by 270.09 tpy in 2015 and 
702.01 tpy in 2021. NOX emissions in the nonattainment area 
are projected to decrease by 42,994.13 tpy in 2015 and 69,887.02 tpy in 
2021. SO2 emissions in the nonattainment area are projected 
to decline by 4,765.88 tpy in 2015 and 28,505.87 in 2021. These rates 
of decline are consistent with monitored and projected air quality 
trends; and emissions reductions achieved through emissions controls 
and regulations that will remain in place beyond 2027, and through 
fleet turnover that will continue beyond 2027, among other factors. EPA 
is proposing that the previously approved MVEBs are adequate for 
conformity purposes. See section 5 below for further details regarding 
MVEBs.
    A maintenance demonstration need not be based on modeling. See Wall 
v. EPA, 265 F.3d 426 (6th Cir. 2001), Sierra Club v. EPA, 375 F. 3d 537 
(7th Cir. 2004). See also 66 FR 53094, 53099-53100 (October 19, 2001), 
68 FR 25413, 25430-25432 (May 12, 2003). Ohio uses emissions inventory 
projections for the years 2018 and 2021 to demonstrate maintenance for 
the entire Cincinnati-Hamilton area. The projected emissions were 
estimated by Ohio, with assistance from LADCO and OKI, who used the 
MOVES2010 model for mobile source projections. Projection modeling of 
inventory emissions was done for the 2018 interim year emissions using 
estimates based on the 2009 and 2018 LADCO modeling inventory, using 
LADCO's growth factors, for all sectors. The 2021 maintenance year 
emission estimates were based on emissions estimates from the 2018 
LADCO modeling. Table 5 shows the 2008 attainment base year emission 
estimates and the 2015 and 2021 emission projections for the 
Cincinnati-Hamilton area, taken from Ohio's July 22, 2016, submission.

 Table 5--Comparison of 2008, 2015 and 2021 NOX, Direct PM2.5, and SO2 Emission Totals (tpy) for the Cincinnati-
                                                  Hamilton Area
----------------------------------------------------------------------------------------------------------------
                                              SO2                        NOX                      PM2.5
----------------------------------------------------------------------------------------------------------------
2008 (baseline)..................  117,016.14...............  148,706.15..............  8,904.64.
2015 (interim)...................  112,250.26...............  105,712.02..............  8,634.55.
2021 (maintenance)...............  88,510.27................  78,819.13...............  8,202.63.
Projected Decrease (2021-2008)...  28,505.87................  69,887.02...............  702.01.
                                   24% decrease.............  47% decrease............  8% decrease.
----------------------------------------------------------------------------------------------------------------

    Table 5 shows that, for the period between 2008 and the maintenance 
projection for 2021, the Cincinnati-Hamilton area will reduce 
NOX emissions by 69,887.02 tpy; direct PM2.5 
emissions by 702.01 tpy; and SO2 emissions by 28,505.87 tpy. 
The 2021 projected emissions levels are significantly below attainment 
year inventory levels, and, based on the rate of decline, it is highly 
improbable that any increases in these levels will occur

[[Page 802]]

in 2027 and beyond. Thus, the emissions inventories set forth in Table 
5 show that the area will continue to maintain the 1997 annual 
PM2.5 standard during the maintenance period and at least 
through 2027.
    As Table 1 demonstrates, monitored PM2.5 design value 
concentrations in the Cincinnati-Hamilton area are well below the NAAQS 
in the years beyond 2008, the attainment year for the area. Further, 
those values are trending downward as time progresses. Based on the 
future projections of emissions in 2015 and 2021 showing significant 
emissions reductions in direct PM2.5, NOX, and 
SO2, it is very unlikely that monitored PM2.5 
values in 2027 and beyond will show violations of the NAAQS. 
Additionally, the 2013-2015 design values, which range from 9.5 to 11.2 
[mu]g/m\3\, provide a sufficient margin in the unlikely event emissions 
rise slightly in the future.
Maintenance Plan Evaluation of Ammonia and VOCs
    With regard to the redesignation of the Cincinnati-Hamilton area, 
in evaluating the effect of the Court's remand of EPA's implementation 
rule, which included presumptions against consideration of VOCs and 
ammonia as PM2.5 precursors, EPA in this proposal is also 
considering the impact of the decision on the maintenance plan required 
under sections 175A and 107(d)(3)(E)(iv). To begin with, EPA notes that 
the area has attained the 1997 annual PM2.5 standard and 
that the state has shown that attainment of the standard is due to 
permanent and enforceable emission reductions.
    EPA proposes to confirm that the state's maintenance plan shows 
continued maintenance of the standard by tracking the levels of the 
precursors whose control brought about attainment of the 1997 
PM2.5 standard in the Cincinnati-Hamilton area. EPA 
therefore believes that the only additional consideration related to 
the maintenance plan requirements that results from the Court's January 
4, 2013 decision is that of assessing the potential role of VOCs and 
ammonia in demonstrating continued maintenance in this area. As 
explained below, based upon documentation provided by the state and 
supporting information, EPA believes that the maintenance plan for the 
Cincinnati-Hamilton area need not include any additional emission 
reductions of VOCs or ammonia in order to provide for continued 
maintenance of the standard.
    First, as noted above in EPA's discussion of section 189(e), VOCs 
emission levels in this area have historically been well-controlled 
under SIP requirements related to ozone and other pollutants. Second, 
total ammonia emissions throughout the Cincinnati-Hamilton area are 
very low, estimated to be less than 3,200 tpy. See Table 6 below. This 
amount of ammonia emissions appears especially small in comparison to 
the total amounts of SO2, NOX, and even direct 
PM2.5 emissions from sources in the area. Third, as 
described below, available information shows that no precursor, 
including VOCs and ammonia, is expected to increase over the 
maintenance period so as to interfere with or undermine the state's 
maintenance demonstration.
    Ohio's maintenance plan shows that emissions of direct 
PM2.5, SO2, and NOX are projected to 
decrease by 702.01 tpy, 28,505.87 tpy, and 69,887.022 tpy, 
respectively, over the maintenance period. See Table 5 above. In 
addition, emissions inventories used in the regulatory impact analysis 
(RIA) for the 2012 PM2.5 NAAQS show that VOCs and ammonia 
emissions are projected to decrease by 16,716 tpy and 119 tpy, 
respectively between 2007 and 2020. See Table 6 below. While the RIA 
emissions inventories are only projected out to 2020, there is no 
reason to believe that this downward trend would not continue through 
2027. Given that the Cincinnati-Hamilton area is already attaining the 
1997 annual PM2.5 NAAQS even with the current level of 
emissions from sources in the area, the downward trend of emissions 
inventories would be consistent with continued attainment. Indeed, 
projected emissions reductions for the precursors that the state is 
addressing for purposes of the 1997 PM2.5 NAAQS indicate 
that the area should continue to attain the NAAQS following the 
precursor control strategy that the state has already elected to 
pursue. Even if VOCs and ammonia emissions were to increase 
unexpectedly between 2020 and 2027, the overall emissions reductions 
projected in direct PM2.5, SO2, and 
NOX would be sufficient to offset any increases. For these 
reasons, EPA believes that local emissions of all of the potential 
PM2.5 precursors will not increase to the extent that they 
will cause monitored PM2.5 levels to violate the 1997 
PM2.5 standard during the maintenance period.

            Table 6--Comparison of 2007 and 2020 VOC and Ammonia Emission Totals by Source Sector (tpy) for the Cincinnati-Hamilton Area \9\
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                VOC                                           Ammonia
                                                         -----------------------------------------------------------------------------------------------
                         Sector                                                             Net change                                      Net change
                                                               2007            2020          2020-2007         2007            2020          2020-2007
--------------------------------------------------------------------------------------------------------------------------------------------------------
fires...................................................             224             224               0              16              16               0
nonpoint................................................          24,149          24,080             -69           2,158           2,223              65
nonroad.................................................           9,294           5,228          -4,066              13              15               2
onroad..................................................          20,317           8,041         -12,275             890             481            -409
point...................................................           5,138           4,831            -306             109             332             222
                                                         -----------------------------------------------------------------------------------------------
    Total...............................................          59,121          42,404         -16,716           3,186           3,067            -119
--------------------------------------------------------------------------------------------------------------------------------------------------------

    In addition, available air quality modeling analyses show continued 
maintenance of the standard during the maintenance period. The current 
annual design values for the area range from 9.5 to 11.2 [mu]g/m3 
(based on 2013-2015 air quality data), which are well below the 1997 
annual PM2.5 NAAQS of 15 [mu]g/m\3\. Moreover, the modeling 
analysis conducted for the RIA for the 2012 PM2.5 NAAQS 
indicates that the design values for this area are expected to continue 
to decline through 2020. In the RIA analysis, the highest 2020 modeled 
design value for the Cincinnati-Hamilton area is 10.5 [mu]g/m\3\. Given 
that precursor emissions are projected to decrease through 2027, it is 
reasonable to conclude that monitored PM2.5 levels

[[Page 803]]

in this area will also continue to decrease through 2027.
---------------------------------------------------------------------------

    \9\ These emissions estimates were taken from the emissions 
inventories developed for the RIA for the 2012 PM2.5 
NAAQS which can be found in the docket.
---------------------------------------------------------------------------

    Thus, EPA believes that there is ample justification to conclude 
that the Cincinnati-Hamilton area should be redesignated, even taking 
into consideration the emissions of other precursors potentially 
relevant to PM2.5. After consideration of the D.C. Circuit's 
January 4, 2013 decision, and for the reasons set forth in this notice, 
EPA proposes to approve the state's revised attainment inventory into 
the previously approved maintenance plan.
    Based on the information summarized above, Ohio has adequately 
demonstrated maintenance of the 1997 PM2.5 standard in this 
area for a period extending in excess of ten years from expected final 
action on Ohio's redesignation request. EPA finds that currently 
approved plan will provide for maintenance.
d. Monitoring Network
    Ohio's approved maintenance plan includes additional elements. 
Ohio's plan includes a commitment to continue to operate its EPA-
approved monitoring network, as necessary to demonstrate ongoing 
compliance with the NAAQS. As detailed above, there are nine monitors 
measuring PM2.5 concentrations in the Cincinnati-Hamilton 
area, and eight of the nine are operated by Ohio. The one other monitor 
is located in Kentucky.
e. Verification of Continued Attainment
    Ohio remains obligated to continue to quality-assure monitoring 
data and enter all data into the AQS in accordance with Federal 
guidelines. Ohio will use these data, supplemented with additional 
information as necessary, to assure that the area continues to attain 
the standard. Ohio will also continue to develop and submit periodic 
emission inventories as required by the Federal Consolidated Emissions 
Reporting Rule (67 FR 39602, June 10, 2002) to track future levels of 
emissions. Both of these actions will help to verify continued 
attainment in accordance with 40 CFR part 58.
f. Contingency Plan
    The contingency plan provisions are designed to promptly correct or 
prevent a violation of the NAAQS that might occur after redesignation 
of an area to attainment. Section 175A of the CAA requires that a 
maintenance plan include such contingency measures as 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 of the contingency measures, 
and a time limit for action by the state. The state should also 
identify specific indicators to be used to determine when the 
contingency measures need to be adopted and implemented. The 
maintenance plan must include a requirement that the state will 
implement all pollution control measures that were contained in the SIP 
before redesignation of the area to attainment. See section 175A(d) of 
the CAA. As described above in section III.4, Ohio's previously 
approved maintenance plan includes all necessary contingency measures 
required under section 175A(d). See 76 FR 80253.
    Ohio further commits to conduct ongoing review of its data, and if 
monitored concentrations or emissions are trending upward, Ohio commits 
to take appropriate steps to avoid a violation if possible. Ohio 
commits to continue implementing SIP requirements upon and after 
redesignation.
    EPA believes that Ohio's approved contingency measures, as well as 
the commitment to continue implementing any SIP requirements, satisfy 
the pertinent requirements of section 175A(d).
    As required by section 175A(b) of the CAA, Ohio commits to submit 
to EPA an updated PM2.5 maintenance plan eight years after 
redesignation of the Cincinnati-Hamilton area to cover an additional 
ten year period beyond the initial ten year maintenance period. As 
required by section 175A of the CAA, Ohio has also committed to retain 
the PM2.5 control measures contained in the SIP prior to 
redesignation.
    For all of the reasons set forth above, EPA determines that the 
approved maintenance plan is still applicable and meets all the 
contingency plan requirements of CAA section 175A.

5. Motor Vehicle Emissions Budget (MVEBs) for the Mobile Source 
Contribution to PM2.5 and NOX

a. How are MVEBs developed and what are the MVEBs for the Cincinnati-
Hamilton area?
    Under the CAA, states are required to submit, at various times, 
control strategy SIP revisions and maintenance plans for 
PM2.5 nonattainment areas and for areas seeking 
redesignation to attainment of the PM2.5 standard. These 
emission control strategy SIP revisions (e.g., RFP and attainment 
demonstration SIP revisions) and maintenance plans create MVEBs based 
on on-road mobile source emissions for criteria pollutants and/or their 
precursors to address pollution from on-road transportation sources. 
The MVEBs are the portions of the total allowable emissions that are 
allocated to highway and transit vehicle use that, together with 
emissions from other sources in the area, will provide for attainment, 
RFP, or maintenance, as applicable.
    Under 40 CFR part 93, a MVEB for an area seeking a redesignation to 
attainment is established for the last year of the maintenance plan and 
could also be established for an interim year or years. The MVEB serves 
as a ceiling on emissions from an area's planned transportation system. 
The MVEB concept is further explained in the preamble to the November 
24, 1993 transportation conformity rule (58 FR 62188).
    Under section 176(c) of the CAA, new transportation plans and 
transportation improvement programs (TIPs) must be evaluated to 
determine if they conform to the purpose of the area's SIP. Conformity 
to the SIP means that transportation activities will not cause new air 
quality violations, worsen existing air quality violations, or delay 
timely attainment of the NAAQS or any required interim milestone. If a 
transportation plan or TIP does not conform, most new transportation 
projects that would expand the capacity of roadways cannot go forward. 
Regulations at 40 CFR part 93 set forth EPA policy, criteria, and 
procedures for demonstrating and assuring conformity of such 
transportation activities to a SIP.
    When reviewing SIP revisions containing MVEBs, including attainment 
strategies, rate-of-progress plans, and maintenance plans, EPA must 
affirmatively find adequate and/or approve the MVEBs for use in 
determining transportation conformity before the MVEBs can be used. 
Once EPA affirmatively approves and/or finds the submitted MVEBs to be 
adequate for transportation conformity purposes, the MVEBs must be used 
by state and Federal agencies in determining whether proposed 
transportation plans and TIPs conform to the SIP as required by section 
176(c) of the CAA. EPA's substantive criteria for determining the 
adequacy of MVEBs are set out in 40 CFR 93.118(e)(4). Additionally, to 
approve a MVEB, EPA must complete a thorough review of the SIP and 
conclude that the SIP will achieve its overall purpose. In this case, 
EPA must review Ohio's PM2.5 maintenance plan and conclude 
that it will provide for maintenance of the 1997 annual 
PM2.5 standard in the Cincinnati-Hamilton area.

[[Page 804]]

    The maintenance plans previously submitted by Ohio for the area 
contained PM2.5 and NOX MVEBs for the area for 
the year 2021. Ohio calculated the MVEBs using MOVES2010. These 
approved budgets are used in future conformity determinations and 
regional emissions analyses prepared by the OKI, and will have to be 
based on the use of MOVES2010 or the most recent version of MOVES 
required to be used in transportation conformity determinations.\10\ 
The state has determined the 2021 MVEBs for the combined Ohio and 
Indiana portions of the Cincinnati-Hamilton area to be 1,241.19 tpy for 
primary PM2.5 and 21,747.71 tpy for NOX. The Ohio 
and Indiana portion of the area included ``safety margins'' as provided 
for in 40 CFR 93.124(a) (described below) of 112.84 tpy for primary 
PM2.5 and 2,836.65 tpy for NOX in the 2021 MVEBs, 
respectively, to provide for on-road mobile source growth. Ohio did not 
provide emission budgets for SO2, VOCs, and ammonia because 
it concluded, consistent with EPA's presumptions regarding these 
precursors, that emissions of these precursors from on-road motor 
vehicles are not significant contributors to the area's 
PM2.5 air quality problem.
---------------------------------------------------------------------------

    \10\ EPA described the circumstances under which an area would 
be required to use MOVES in transportation conformity determinations 
in its March 2, 2010, Federal Register notice officially releasing 
MOVES2010 for use in SIPs and transportation conformity 
determinations. (75 FR 9413)
---------------------------------------------------------------------------

    In the Cincinnati-Hamilton area, the motor vehicle budgets 
including the safety margins and motor vehicle emission projections for 
both NOX and PM2.5 are equal to the levels in the 
attainment year.
    EPA has reviewed the previously approved budgets for 2021 including 
the added safety margins using the conformity rule's adequacy criteria 
found at 40 CFR 93.118(e)(4) and the conformity rule's requirements for 
safety margins found at 40 CFR 93.124(a). EPA has reviewed the approved 
budgets and the maintenance plan, and EPA is determining that the 2021 
direct PM2.5 and NOX budgets, including the 
requested safety margins for the Cincinnati-Hamilton area, are adequate 
for use in conformity.
b. What action is EPA taking on the submitted motor vehicle emissions 
budgets?
    EPA previously approved Ohio's MVEBs for use to determine 
transportation conformity in the Cincinnati-Hamilton area and these 
budgets remain applicable. EPA has determined that the area can 
maintain attainment of the 1997 annual PM2.5 NAAQS for the 
relevant maintenance period and no changes to the plan have been made. 
See 76 FR 80253.

6. Comprehensive Emissions Inventory

    As discussed above, section 172(c)(3) of the CAA requires areas to 
submit a comprehensive emissions inventory including direct PM and all 
four precursors (SO2, NOX, VOCs, and ammonia). 
EPA approved the Ohio 2005 base year emissions inventory on December 
23, 2011 (76 FR 80253). This previously approved base year emissions 
inventory detailed emissions of PM2.5, SO2, and 
NOX for 2005. Emissions inventories for VOCs and ammonia 
from 2007, taken from the RIA for the 2012 PM2.5 NAAQS, have 
been added as part of this submittal in accordance with the provisions 
of subpart 4 (Title I, Part D) of the CAA. Emissions contained in the 
submittal cover the general source categories of point sources, area 
sources, on-road mobile sources, and nonroad mobile sources.
    Based upon EPA's previous action and 2007 emissions inventory for 
VOCs and ammonia, the emissions inventory was complete and accurate, 
and met the requirement of CAA section 172(c)(3).
IV. EPA's Proposed Actions
    EPA is proposing to take several actions related to redesignation 
of the Cincinnati-Hamilton area to attainment for the 1997 annual 
PM2.5 NAAQS.
    EPA has previously approved Ohio's PM2.5 maintenance 
plan and MVEBs for the Cincinnati-Hamilton area. EPA is proposing to 
determine that this plan and budgets are still applicable.
    EPA has previously approved the 2005 primary PM2.5, 
NOX, and SO2 base year emissions inventory. EPA 
is proposing to approve Ohio's updated emissions inventory which 
includes emissions inventories for VOCs and ammonia from 2007. EPA is 
proposing that Ohio meets the emissions inventory requirement under 
section 107(d)(3)(E)(iii).
    EPA is proposing to approve the RACM/RACT portion of Ohio's prior 
Cincinnati-Hamilton area attainment plan SIP revision as providing 
adequate RACM/RACT consistent with the provisions of 40 CFR 51.1010(b), 
because Ohio has demonstrated with a RACM/RACT analysis that no further 
control measures would advance the attainment date in the area.
    EPA is proposing that Ohio meets the requirements for redesignation 
of the Cincinnati-Hamilton area to attainment of the 1997 annual 
PM2.5 NAAQS under section 107(d)(3)(E) of the CAA. EPA is 
thus proposing to grant Ohio's request to change the designation of its 
portion of the Cincinnati-Hamilton area from nonattainment to 
attainment for the 1997 annual PM2.5 NAAQS.
    If finalized, approval of the redesignation request would change 
the official designation of the Ohio portion of the Cincinnati-Hamilton 
area for the 1997 annual PM2.5 NAAQS, found at 40 CFR part 
81, from nonattainment to attainment. If finalized, EPA would determine 
that the previously approved maintenance plan is still applicable to 
the Cincinnati-Hamilton area for the 1997 annual PM2.5 
NAAQS.

V. 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 CAA and applicable Federal regulations. 42 U.S.C. 7410(k); 40 
CFR 52.02(a). Thus, in reviewing SIP submissions, EPA's role is to 
approve state choices, provided that they meet the criteria of the CAA. 
Accordingly, this action merely proposes to approve state law as 
meeting Federal requirements and, if finalized, will not impose 
additional requirements beyond those imposed by state law. For that 
reason, this actions:
     Is not a significant regulatory action subject to review 
by the Office of Management and Budget under Executive Orders 12866 (58 
FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21, 2011);
     Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Is certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);
     Does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);

[[Page 805]]

     Does not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not economically significant regulatory action based on 
health or safety risks subject to Executive Order 13045 (62 FR 19885, 
April 23, 1997);
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Is not subject to requirements of Section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) because application of those requirements would be inconsistent 
with the Clean Air Act; and
     Does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    In addition, the SIP is not approved to apply on any Indian 
reservation land or in any other area where EPA or an Indian tribe has 
demonstrated that a tribe has jurisdiction. In those areas of Indian 
country, this rule does not have tribal implications as specified by 
Executive Order 13175 (65 FR 67249, November 9, 2000), because 
redesignation is an action that affects the status of a geographical 
area and does not impose any new regulatory requirements on tribes, 
impact any existing sources of air pollution on tribal lands, nor 
impair the maintenance of ozone national ambient air quality standards 
in tribal lands.

List of Subjects

40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Intergovernmental relations, Particulate matter.

40 CFR Part 81

    Environmental protection, Air pollution control, National parks, 
Wilderness areas.

    Dated: December 13, 2016.
Robert Kaplan,
Acting Regional Administrator, Region 5.
[FR Doc. 2016-31635 Filed 1-3-17; 8:45 am]
BILLING CODE 6560-50-P



                                                    792                    Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                    section, will only be enforced when                     that the Cincinnati-Hamilton area is                   information about CBI or multimedia
                                                    Coast Guard Sector Guam issues a                        attaining the annual PM2.5 standard,                   submissions, and general guidance on
                                                    Broadcast Notice to Mariners via VHF–                   EPA is proposing to redesignate the area               making effective comments, please visit
                                                    FM marine channel 16 about the zone                     to attainment and also proposing several               http://www2.epa.gov/dockets/
                                                    and Naval Wharf Kilo, and a vessel                      additional related actions. EPA is                     commenting-epa-dockets.
                                                    berthed at Naval Wharf Kilo, is                         proposing to approve the Reasonably                    FOR FURTHER INFORMATION CONTACT:
                                                    displaying a red (BRAVO) flag by day or                 Available Control Measures (RACM)-                     Joseph Ko, Environmental Engineer,
                                                    a red light by night.                                   Reasonably Available Control                           Attainment Planning and Maintenance
                                                       (2) Safety Zone B described in                       Technology (RACT) portion of Ohio’s                    Section, Air Programs Branch (AR–18J),
                                                    paragraph (a) of this section will only be              Cincinnati-Hamilton area attainment                    Environmental Protection Agency,
                                                    enforced when Coast Guard Sector                        plan SIP revision as providing adequate                Region 5, 77 West Jackson Boulevard,
                                                    Guam issues a Broadcast Notice to                       RACM/RACT. EPA is proposing to                         Chicago, Illinois 60604, (312) 886–7947,
                                                    Mariners via VHF–FM marine channel                      approve an update to the Ohio state                    ko.joseph@epa.gov.
                                                    16 about the zone and Naval Wharf Kilo,                 implementation plan (SIP), by updating                 SUPPLEMENTARY INFORMATION: This
                                                    and a vessel berthed at Naval Wharf                     the state’s approved plan for                          supplementary information section is
                                                    Kilo, is displaying 2 red (BRAVO) flags                 maintaining the 1997 annual PM2.5                      arranged as follows:
                                                    by day or 2 red lights by night.                        NAAQS through 2027. EPA previously
                                                       (3) Safety Zone D is permanent and                   approved the base year emissions                       Contents
                                                    will be enforced at all times.                          inventory for the Cincinnati-Hamilton                  I. Background
                                                       (4) Under general regulations in                     area, and is proposing to approve Ohio’s               II. What are the criteria for redesignation to
                                                    § 165.23, during periods of enforcement,                updated emission inventory which                             attainment?
                                                    entry into the Safety Zones A and B as                  includes emission inventories for                      III. What is EPA’s analysis of the state’s
                                                    described in paragraph (a) of this                      volatile organic compounds (VOCs) and                        request?
                                                    section, is prohibited unless expressly                 ammonia. Ohio’s approved maintenance                      1. Attainment
                                                    authorized by the Captain of the Port,                  plan submission includes a budget for                     2. Section 110 and Part D Requirements,
                                                                                                            the mobile source contribution of PM2.5                      and Approval SIP under Section 110(k)
                                                    Guam or a designated representative.
                                                                                                                                                                         (Section 107(d)(3)(E)(ii) and (v))
                                                    Entry into Safety Zone D is prohibited                  and nitrogen oxides (NOX) to the                          3. Permanent and Enforceable Reductions
                                                    at all times unless expressly authorized                Cincinnati-Hamilton Ohio PM2.5 area for                      in Emissions (Section 107(d)(3)(E)(iii))
                                                    by the Captain of the Port, Guam or a                   transportation conformity purposes,                       4. Maintenance Plan Pursuant to Section
                                                    designated representative.                              which EPA is proposing to approve and                        175A of the CAA (Section
                                                      Dated: December 5, 2016.                              update. EPA is proposing to take these                       107(d)(3)(E)(iv))
                                                                                                            actions in accordance with the Clean                      5. Motor Vehicle Emissions Budget
                                                    James B. Pruett,                                                                                                     (MVEBs) for the Mobile Source
                                                                                                            Air Act (CAA) and EPA’s
                                                    Captain, U.S. Coast Guard, Captain of the                                                                            Contribution to PM2.5 and NOX
                                                    Port, Guam.
                                                                                                            implementation rule regarding the 1997
                                                                                                            PM2.5 NAAQS.                                              6. Comprehensive Emissions Inventory
                                                    [FR Doc. 2016–31894 Filed 1–3–17; 8:45 am]                                                                     IV. EPA’s Proposed Actions
                                                                                                            DATES: Comments must be received on                    V. Statutory and Executive Order Reviews
                                                    BILLING CODE 9110–04–P
                                                                                                            or before February 3, 2017.
                                                                                                            ADDRESSES: Submit your comments,                       I. Background
                                                                                                            identified by Docket ID No. EPA–R05–                     The first air quality standards for
                                                    ENVIRONMENTAL PROTECTION
                                                                                                            OAR–2016–0479 at http://                               PM2.5 were promulgated on July 18,
                                                    AGENCY
                                                                                                            www.regulations.gov, or via email to                   1997, at 62 FR 38652. EPA promulgated
                                                    40 CFR Parts 52 and 81                                  aburano.douglas@epa.gov. For                           an annual standard at a level of 15
                                                                                                            comments submitted at Regulations.gov,                 micrograms per cubic meter (mg/m3) of
                                                    [EPA–R05–OAR–2016–0479; FRL–9957–60–                    follow the online instructions for                     ambient air, based on a three-year
                                                    Region 5]                                               submitting comments. Once submitted,                   average of the annual mean PM2.5
                                                                                                            comments cannot be edited or removed                   concentrations at each monitoring site.
                                                    Air Plan Approval; Ohio;
                                                                                                            from Regulations.gov. For either manner                  On January 5, 2005, at 70 FR 944, EPA
                                                    Redesignation of the Ohio Portion of
                                                                                                            of submission, EPA may publish any                     published air quality area designations
                                                    the Cincinnati-Hamilton, OH-IN-KY
                                                                                                            comment received to its public docket.                 for the 1997 annual PM2.5 standard
                                                    Area to Attainment of the 1997 Annual
                                                                                                            Do not submit electronically any                       based on air quality data for calendar
                                                    Standard for Fine Particulate Matter
                                                                                                            information you consider to be                         years 2001–2003. In that rulemaking,
                                                    AGENCY:  Environmental Protection                       Confidential Business Information (CBI)                EPA designated the Cincinnati-
                                                    Agency (EPA).                                           or other information whose disclosure is               Hamilton area (the Ohio portion being
                                                    ACTION: Proposed rule.                                  restricted by statute. Multimedia                      Butler, Clermont, Hamilton, and Warren
                                                                                                            submissions (audio, video, etc.) must be               Counties) as nonattainment for the 1997
                                                    SUMMARY:   The Environmental Protection                 accompanied by a written comment.                      annual PM2.5 standard.
                                                    Agency (EPA) is proposing to                            The written comment is considered the                    In this proposed redesignation, EPA
                                                    redesignate the Ohio portion of the                     official comment and should include                    takes into account two decisions of the
                                                    Cincinnati-Hamilton, OH-IN-KY,                          discussion of all points you wish to                   D.C. Circuit. On August 21, 2012, in
                                                    nonattainment area (hereafter, ‘‘the                    make. EPA will generally not consider                  EME Homer City Generation, L.P. v.
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                                                    Cincinnati-Hamilton area’’) to                          comments or comment contents located                   EPA, 696 F.3d 7 (D.C. Cir. 2012), the
                                                    attainment for the 1997 fine particulate                outside of the primary submission (i.e.                D.C. Circuit vacated and remanded the
                                                    matter (PM2.5) annual national ambient                  on the web, cloud, or other file sharing               Cross State Air Pollution Rule (CSAPR)
                                                    air quality standards (NAAQS or                         system). For additional submission                     and ordered EPA to continue
                                                    standard). The Ohio portion of the                      methods, please contact the person                     administering the Clean Air Interstate
                                                    Cincinnati-Hamilton area includes                       identified in the ‘‘For Further                        Rule (CAIR) ‘‘pending . . . development
                                                    Butler, Clermont, Hamilton, and Warren                  Information Contact’’ section. For the                 of a valid replacement.’’ EME Homer
                                                    Counties. Because EPA has determined                    full EPA public comment policy,                        City at 38. The D.C. Circuit denied all


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                                                                           Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                                                          793

                                                    petitions for rehearing in the case on                               III. What is EPA’s analysis of the state’s                         Hamilton (OH), and Campbell (KY)
                                                    January 24, 2013. In the second                                      request?                                                           Counties that reported design values
                                                    decision, on January 4, 2013, the D.C.                                  EPA is proposing to redesignate the                             from 2013–2015 for PM2.5 that ranged
                                                    Circuit remanded to EPA the ‘‘Final                                  Ohio portion of the Cincinnati-Hamilton                            from 9.5 to 11.2 mg/m3 for the 1997
                                                    Clean Air Fine Particle Implementation                               area to attainment of the 1997 annual                              annual standard. The data are
                                                    Rule’’ (72 FR 20586, April 25, 2007) and                             PM2.5 NAAQS, and is proposing to                                   summarized shown in Table 1 below.
                                                    the ‘‘Implementation of the New Source                               approve updates to Ohio’s maintenance                                 There are three additional monitor
                                                    Review (NSR) Program for Particulate                                 plan for the area and other related SIP                            sites in Butler County that are not listed
                                                    Matter Less than 2.5 Micrometers                                     revisions. EPA is also proposing to                                in Table 1 because the data from these
                                                    (PM2.5)’’ final rule (73 FR 28321, May                               approve Ohio’s RACM/RACT analysis.                                 sites are not used for redesignation
                                                    16, 2008). Natural Resources Defense                                 The bases for these proposed actions                               purposes. On October 31, 2014, EPA
                                                    Council v. EPA, 706 F.3d 428 (D.C. Cir.                              follow.                                                            determined that site 39–017–0020 was
                                                                                                                                                                                            located within the immediate area of
                                                    2013).                                                               1. Attainment                                                      several facilities, and that the
                                                    II. What are the criteria for                                           In accordance with section 179(c) of                            monitoring data from the site would no
                                                    redesignation to attainment?                                         the CAA, 42 U.S.C. 7509(c) and 40 CFR                              longer be compared to the annual PM2.5
                                                                                                                         51.1004(c), EPA is proposing to                                    standard. On February 5, 2015, monitor
                                                      The CAA sets forth the requirements                                determine that the Cincinnati-Hamilton                             site 39–017–0022 in Bulter County
                                                    for redesignating a nonattainment area                               area has attained the 1997 annual PM2.5                            became active, but since it is a ‘‘special
                                                    to attainment. Specifically, section                                 NAAQS. This proposed determination                                 purpose monitor’’, it cannot be used for
                                                    107(d)(3)(E) of the CAA allows for                                   is based upon complete, quality-                                   comparison to the NAAQS before 24
                                                    redesignation provided that: (1) The                                 assured, and certified ambient air                                 months, per 40 CFR 58.20. Additionally,
                                                    Administrator determines that the area                               monitoring data for the 2013–2015                                  a new monitor site, 39–017–0016,
                                                    has attained the applicable NAAQS                                    monitoring period that shows this area                             became active in 2016 but it was not
                                                    based on current air quality data; (2) the                           has monitored attainment of the 1997                               included in Ohio’s analysis because it
                                                    Administrator has fully approved an                                  PM2.5 NAAQS.                                                       does not yet have three years of valid
                                                    applicable SIP for the area under section                               Under EPA’s regulations at 40 CFR                               data.
                                                    110(k) of the CAA; (3) the Administrator                             50.7, the annual primary and secondary                                All monitors in the Cincinnati-
                                                    determines that the improvement in air                               PM2.5 standards are met when the                                   Hamilton area recorded complete data
                                                    quality is due to permanent and                                      annual arithmetic mean concentration,                              in accordance with criteria set forth by
                                                    enforceable emission reductions                                      as determined in accordance with 40                                EPA in 40 CFR part 50 appendix N,
                                                    resulting from implementation of the                                 CFR part 50, appendix N, is less than or                           where a complete year of air quality
                                                    applicable SIP, Federal air pollution                                equal to 15.0 mg/m3 at all relevant                                data comprises four calendar quarters,
                                                    control regulations, or other permanent                              monitoring sites in the area.                                      with each quarter containing data from
                                                                                                                            EPA has reviewed the ambient air                                at least 75% capture of the scheduled
                                                    and enforceable emission reductions; (4)
                                                                                                                         quality monitoring data in the                                     sampling days. Data available are
                                                    the Administrator has fully approved a
                                                                                                                         Cincinnati-Hamilton area, consistent                               considered to be sufficient for
                                                    maintenance plan for the area meeting
                                                                                                                         with the provisions of 40 CFR part 50,                             comparison to the NAAQS if three
                                                    the requirements of section 175A of the                                                                                                 consecutive complete years of data
                                                                                                                         appendix T. EPA’s review focused on
                                                    CAA; and (5) the state containing the                                data recorded in the EPA Air Quality                               exist. Recently the state certified data
                                                    area has met all requirements applicable                             System (AQS) database for the                                      for 2013–2015 show the area continues
                                                    to the area for purposes of redesignation                            Cincinnati-Hamilton area for PM2.5                                 to attain the standard. Partial 2016 data
                                                    under section 110 and part D of the                                  nonattainment area from 2013–2015.                                 for all relevant monitors also support a
                                                    CAA.                                                                    The Cincinnati-Hamilton area has                                finding that the area continues to attain
                                                                                                                         nine monitors located in Butler (OH),                              the standard.

                                                                     TABLE 1—ANNUAL PM2.5 DESIGN VALUES FOR THE CINCINNATI-HAMILTON AREA FOR 2013–2015
                                                                                                                                                                                           Annual design values (μg/m3)

                                                                                              County/Site                                                                                      Year                            Average

                                                                                                                                                                             2013             2014             2015           2013–2015

                                                    Butler, OH:
                                                        39–017–0003      ............................................................................................               11.1              11.3            10.3           10.9
                                                        39–017–0016      ............................................................................................               10.7              10.7             9.5           10.3
                                                        39–017–0019      ............................................................................................                11               11.2            10.2           10.8
                                                    Hamilton, OH:
                                                        39–061–0006      ............................................................................................               10.1              10.3             9.3            9.9
                                                        39–061–0014      ............................................................................................               11.6              11.3            10.7           11.2
                                                        39–061–0040      ............................................................................................               10.6              10.4             9.2           10.1
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                                                        39–061–0042      ............................................................................................               11.5              11.2            10.1             11
                                                        39–061–0010      ............................................................................................               10.5              10.4             9.2             10
                                                    Campbell, KY:
                                                        21–037–3002      ............................................................................................                9.6               9.7            9.4 *              9.5
                                                       * less than 75% capture in one quarter at the primary monitor, but substitution using a secondary monitor was completed resulting in an AQS
                                                    ’valid’ design value.




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                                                    794                    Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                      Based on the information summarized                   planning and emission control rule                     110(a)(2) are not relevant to this
                                                    above, EPA has found that the                           development.                                           redesignation, and are statewide
                                                    Cincinnati-Hamilton area has attained                      Section 110(a)(2)(D) of the CAA                     requirements that are not linked to the
                                                    the 1997 annual PM2.5 NAAQS.                            requires that SIPs contain measures to                 PM2.5 nonattainment status of the
                                                                                                            prevent sources in a state from                        Cincinnati-Hamilton area. Therefore,
                                                    2. Section 110 and Part D Requirements,                 significantly contributing to air quality              EPA believes that these SIP elements are
                                                    and Approval SIP Under Section 110(k)                   problems in another state. EPA believes                not applicable requirements for
                                                    (Section 107(d)(3)(E)(ii) and (v))                      that the requirements linked with a                    purposes of review of the state’s PM2.5
                                                      We have determined that, under                        particular nonattainment area’s                        redesignation request.
                                                    section 110 of the CAA (general SIP                     designation are the relevant measures to
                                                                                                            evaluate in reviewing a redesignation                  b. Part D Requirements
                                                    requirements), Ohio has met all
                                                    currently applicable SIP requirements                   request. The transport SIP submittal                      EPA has determined that, upon
                                                    for purposes of redesignation for the                   requirements, where applicable,                        approval of the base year emissions
                                                    Cincinnati-Hamilton area. We are also                   continue to apply to a state regardless of             inventories discussed in section III.6 of
                                                    proposing to find, in accordance with                   the designation of any one particular                  this rulemaking, the Ohio SIP will meet
                                                    section 107(d)(3)(E)(v), that the Ohio                  area in the state. Thus, we believe that               the applicable SIP requirements for the
                                                    submittal meets all SIP requirements                    these requirements should not be                       Cincinnati-Hamilton area applicable for
                                                    currently applicable for purposes of                    construed as the applicable                            purposes of redesignation under part D
                                                    redesignation under part D of title I of                requirements for purposes of                           of the CAA. Subpart 1 of part D, found
                                                    the CAA. In addition, we are proposing                  redesignation.                                         in sections 172–176 of the CAA, sets
                                                    to find, in accordance with section                        Further, we believe that the other                  forth the basic nonattainment
                                                    107(d)(3)(E)(ii), that all applicable                   section 110 elements described above                   requirements applicable to all
                                                    requirements of the Ohio SIP for                        that are not connected with                            nonattainment areas. Subpart 4 of part
                                                    purposes of redesignation have been                     nonattainment plan submissions and                     D, found in sections 189 of the CAA,
                                                    approved. As discussed above, EPA                       not linked with an area’s attainment                   sets forth nonattainment requirements
                                                                                                            status are not applicable requirements                 applicable for particulate matter
                                                    previously approved Ohio’s 2005
                                                                                                            for purposes of redesignation. A state                 nonattainment areas.
                                                    emissions inventory as meeting the
                                                                                                            remains subject to these requirements
                                                    section 172(c)(3) comprehensive                                                                                (i) RACM/RACT Requirements Under
                                                                                                            after an area is redesignated to
                                                    emissions inventory requirement.                                                                               Section 172(c)(1)
                                                                                                            attainment. We conclude that only the
                                                      In making these proposed                              section 110 and part D requirements                       Section 172(c)(1) requires that each
                                                    determinations, we have ascertained                     that are linked with a particular area’s               attainment plan ‘‘provide for the
                                                    which SIP requirements are applicable                   designation are the relevant measures                  implementation of all reasonably
                                                    for purposes of redesignation, and                      which we may consider in evaluating a                  available control measures as
                                                    concluded that the Ohio SIP includes                    redesignation request. See Reading,                    expeditiously as practicable (including
                                                    measures meeting those requirements                     Pennsylvania, proposed and final                       such reductions in emissions from the
                                                    and that they are fully approved under                  rulemakings (61 FR 53174–53176,                        existing sources in the area as may be
                                                    section 110(k) of the CAA.                              October 10, 1996) and (62 FR 24826,                    obtained through the adoption, at a
                                                    a. Section 110 General SIP                              May 7, 1997); Cleveland-Akron-Lorain,                  minimum, of reasonably available
                                                    Requirements                                            Ohio, final rulemaking (61 FR 20458,                   control technology), and shall provide
                                                                                                            May 7, 1996); and Tampa, Florida, final                for attainment of the national primary
                                                      Section 110(a) of title I of the CAA                  rulemaking (60 FR 62748, December 7,                   ambient air quality standards.’’ The
                                                    contains the general requirements for a                 1995). See also the discussion on this                 PM2.5 Implementation Rule (72 FR
                                                    SIP. Section 110(a)(2) provides that the                issue in the Cincinnati, Ohio 1-hour                   20586) requires that the subpart 1
                                                    implementation plan submitted by a                      ozone redesignation (65 FR 37890, June                 RACM portion of the attainment plan
                                                    state must have been adopted by the                     19, 2000), and in the Pittsburgh,                      SIP revision include the list of potential
                                                    state after reasonable public notice and                Pennsylvania 1-hour ozone                              measures that a state considered and
                                                    hearing, and, among other things, must:                 redesignation (66 FR 50399, October 19,                additional information sufficient to
                                                    Include enforceable emission                            2001).                                                 show that the state has met all
                                                    limitations and other control measures,                    We have reviewed the Ohio SIP and                   requirements for the determination of
                                                    means or techniques necessary to meet                   have concluded that it meets the general               what constitutes RACM in a specific
                                                    the requirements of the CAA; provide                    SIP requirements under section 110 of                  nonattainment area. See 40 CFR
                                                    for establishment and operation of                      the CAA to the extent they are                         51.1010(a). Any measures that are
                                                    appropriate devices, methods, systems,                  applicable for purposes of                             necessary to meet these requirements
                                                    and procedures necessary to monitor                     redesignation. EPA has previously                      that are not already either federally
                                                    ambient air quality; provide for                        approved provisions of Ohio’s SIP                      promulgated, part of the SIP, or
                                                    implementation of a source permit                       addressing section 110 requirements                    otherwise creditable in SIPs must be
                                                    program to regulate the modification                    (including provisions addressing                       submitted in enforceable form as part of
                                                    and construction of any stationary                      particulate matter), at 40 CFR 52.1870.                a state’s attainment plan SIP revision for
                                                    source within the areas covered by the                     On December 5, 2007, Ohio made a                    the area.
                                                    plan; include provisions for the                        submittal addressing ‘‘infrastructure                     In 1972, 1980, and 1991, Ohio
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                                                    implementation of part C, Prevention of                 SIP’’ elements required under CAA                      promulgated RACM rules for particulate
                                                    Significant Deterioration (PSD) and part                section 110(a)(2). EPA proposed                        emissions from stationary sources. Ohio
                                                    D, NSR permit programs; include                         approval of the December 5, 2007,                      also has RACT rules found in OAC
                                                    criteria for stationary source emission                 submittal on April 28, 2011, at 76 FR                  Chapter 3745–17. Lake Michigan Air
                                                    control measures, monitoring, and                       23757 and published final approval on                  Directors Consortium (LADCO), in
                                                    reporting; include provisions for air                   July 13, 2011, at 76 FR 41075.                         consultation with two contractors,
                                                    quality modeling; and provide for                          The remaining parts of the                          performed a series of studies exploring
                                                    public and local agency participation in                infrastructure SIPs required by section                control measures for reducing both


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                                                                            Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                              795

                                                    ozone precursors and PM2.5 precursors                    Sixth Circuit vacated the redesignation                 for the implementation of RACM as
                                                    in Ohio, Illinois, Indiana, Michigan, and                of the Ohio and Indiana portion of the                  expeditiously as practicable and to
                                                    Wisconsin. Photochemical modeling                        area based on its view that RACM/RACT                   provide for attainment of the primary
                                                    was then conducted to assess the air                     must be considered an applicable                        NAAQS. EPA interprets this
                                                    quality benefits of the candidate control                requirement for designation purposes.                   requirement to impose a duty on all
                                                    measures. In its attainment                              Consistent with that ruling, EPA is now                 states to consider all available control
                                                    demonstration submitted on July 18,                      finding that Ohio has satisfied this                    measures for all nonattainment areas
                                                    2008, Ohio demonstrated that                             applicable requirement.                                 and to adopt and implement such
                                                    attainment would be achieved in the                                                                              measures as are reasonably available for
                                                                                                             (ii) Other Section 172 Requirements
                                                    Cincinnati-Hamilton area by 2009,                                                                                implementation in each area as
                                                    based on the modeling conducted by the                      For purposes of evaluating this                      components of the area’s attainment
                                                    LADCO project team. Because of the                       redesignation request, the applicable                   demonstration.
                                                    projected 2009 attainment date, it would                 section 172 SIP requirements for the                       As noted above in the previous
                                                    not have been reasonably possible or                     Cincinnati-Hamilton area are contained                  section, the Sixth Circuit concluded that
                                                    practicable for Ohio to develop RACM/                    in sections 172(c)(1)–(9). A thorough                   ‘‘a State seeking redesignation ‘shall
                                                    RACT requirements, promulgate                            discussion of the requirements                          provide for the implementation’ of
                                                    regulations and implement a control                      contained in section 172 can be found                   RACM/RACT, even if those measures
                                                    program prior to 2009. Ohio concluded                    in the General Preamble for                             are not strictly necessary to demonstrate
                                                    that its RACM/RACT analysis, based on                    Implementation of Title I (57 FR 13498,                 attainment with the PM2.5 NAAQS. . . .
                                                    LADCO modeling, demonstrates that                        April 16, 1992).                                        If a State has not done so, EPA cannot
                                                    current control measures in Ohio satisfy                    Under section 172, states with                       ‘fully approve[]’ the area’s SIP, and
                                                    RACM/RACT for the 1997 annual PM2.5                      nonattainment areas must submit plans                   redesignation to attainment status is
                                                    standard.                                                providing for timely attainment and                     improper.’’ Sierra Club, 793 F.3d at 670.
                                                       EPA has reviewed Ohio’s RACM/                         meeting a variety of other requirements.                   EPA is adhering to the Sixth Circuit’s
                                                    RACT analysis and agrees that it                         However, pursuant to 40 CFR                             decision. Ohio has demonstrated that no
                                                    indicates that no other reasonably                       51.1004(c), EPA’s determination that the                further control measures would be
                                                    available measures were available, or                    area has attained the 1997 annual PM2.5                 necessary to advance the attainment
                                                    necessary, to attain or advance                          standard suspends the requirement to                    date in the Cincinnati-Hamilton area,
                                                    attainment of the standard. Because                      submit certain planning SIPs related to                 and EPA is proposing to approve
                                                    Ohio has demonstrated with modeling                      attainment, including: Attainment                       existing control measures as satisfying
                                                    that no further control measures would                   demonstration requirements, the RFP                     RACM/RACT requirements under
                                                    advance the attainment date in the area,                 and attainment demonstration                            section 172(c)(1). A further discussion
                                                    EPA is proposing to approve Ohio’s                       requirements of sections 172(c)(2) and                  on RACM/RACT requirements can be
                                                    RACM/RACT portion of the attainment                      (6) and 182(b)(1) of the CAA, and the                   found in the previous section entitled
                                                    plan SIP revision as providing adequate                  requirement for contingency measures                    ‘‘RACM/RACT Requirements Under
                                                    RACM/RACT consistent with the                            of section 172(c)(9) of the CAA.                        Section 172(c)(1).’’
                                                                                                                As a result, the only remaining                         The reasonable further progress (RFP)
                                                    provisions of 40 CFR 51.1010(b).
                                                                                                             requirements under section 172 to be                    requirement under section 172(c)(2) is
                                                       EPA previously redesignated the
                                                                                                             considered are the emissions inventory                  defined as progress that must be made
                                                    Cincinnati-Hamilton area to attainment
                                                                                                             requirement under section 172(c)(3),                    toward attainment. This requirement is
                                                    for the 1997 annual PM2.5 standard,
                                                                                                             and the RACM/RACT requirement of                        not relevant for purposes of the
                                                    predicated in part on a finding that the
                                                                                                             section 172(c)(1) per the 6th circuit                   Cincinnati-Hamilton redesignation
                                                    RACM/RACT requirement (interpreted
                                                                                                             decision. As discussed previously, EPA                  because the area has monitored
                                                    as reflecting those reasonable measures
                                                                                                             is proposing to approve the VOCs and                    attainment of the 1997 annual PM2.5
                                                    needed to attain the standard) was not
                                                                                                             ammonia emissions inventories that                      NAAQS. (General Preamble, 57 FR
                                                    an applicable requirement for purposes
                                                                                                             Ohio submitted as satisfying the section                13564). See also 40 CFR 51.918. The
                                                    of redesignation of areas already
                                                                                                             172(c)(3) requirement, and existing                     requirement to submit the section
                                                    meeting the standard. EPA has long                       control measures as satisfying RACM/
                                                    interpreted that subpart 1                                                                                       172(c)(9) contingency measures is
                                                                                                             RACT requirements under section                         similarly not applicable for purposes of
                                                    nonattainment planning requirements,                     172(c)(1).
                                                    including RACM, are not ‘‘applicable for                                                                         redesignation. Id.
                                                                                                                No SIP provisions applicable for                        Section 172(c)(3) requires submission
                                                    purposes of section 107(d)(3)(E)(ii) and                 redesignation of the Cincinnati-                        and approval of a comprehensive,
                                                    (v) when an area is attaining the                        Hamilton area are currently                             accurate and current inventory of actual
                                                    NAAQS, and, therefore, need not be                       disapproved, conditionally approved, or                 emissions. Ohio submitted a 2005 base
                                                    approved into the SIP before EPA can                     partially approved. Ohio currently has a                year emissions inventory in the required
                                                    redesignate the area. See 76 FR 80258.                   fully approved SIP for all requirements,
                                                       On July 14, 2015, the United States                                                                           attainment plan, and also updated the
                                                                                                             as applicable for purposes of                           emissions inventory with VOCs and
                                                    Court of Appeals for the Sixth Circuit                   redesignation under the Sixth Circuit’s
                                                    (Sixth Circuit) issued an opinion in                                                                             ammonia emissions from 2007. EPA
                                                                                                             Sierra Club decision.                                   previously approved the 2005 base year
                                                    Sierra Club v. EPA, 793 F.3d 656 (6th                       Section 172(c)(1) requires the plans
                                                    Cir. 2015), vacating EPA’s redesignation                                                                         emissions inventory (76 FR 64825), and
                                                                                                             for all nonattainment areas to provide                  is proposing to approve the emissions
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                                                    of the Indiana and Ohio portions of the
                                                    Cincinnati-Hamilton area to attainment                                                                           inventory for VOCs and ammonia.
                                                                                                             rehearing en banc and panel rehearing had been             Section 172(c)(4) requires the
                                                    for the 1997 PM2.5 NAAQS on the basis                    filed. The amended opinion revised some of the
                                                                                                             legal aspects of the Court’s analysis of the relevant   identification and quantification of
                                                    that EPA had not approved subpart 1
                                                                                                             statutory provisions (section 107(d)(3)(E)(ii) and      allowable emissions for major new and
                                                    RACM for the area into the SIP.1 The                     section 172(c)(1)), but the overall holding of the      modified stationary sources in an area,
                                                                                                             opinion was unaltered. On March 28, 2016, the
                                                      1 The Court issued its initial decision in the case    Supreme Court denied a petition for certiorari from
                                                                                                                                                                     and section 172(c)(5) requires source
                                                    on March 18, 2015, and subsequently issued an            Ohio requesting review of the Sixth Circuit’s           permits for the construction and
                                                    amended opinion on July 14 after appeals for             decision.                                               operation of new and modified major


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                                                    796                    Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                    stationary sources anywhere in the                      consultation, enforcement, and                         nonattainment areas, and would remain
                                                    nonattainment area. EPA approved                        enforceability, which EPA promulgated                  moderate nonattainment areas unless
                                                    Ohio’s current NSR program on January                   pursuant to CAA requirements.                          and until EPA reclassifies the area as a
                                                    10, 2003 (68 FR 1366), but has not                         EPA approved Ohio’s transportation                  ‘‘serious’’ nonattainment area.
                                                    approved updates since that time.                       conformity SIPs on March 2, 2015 (80                   Accordingly, EPA believes that it is
                                                    Nonetheless, since PSD requirements                     FR 11134). In April 2010, EPA                          appropriate to limit the evaluation of
                                                    will apply after redesignation, the area                promulgated changes to 40 CFR 51.851,                  the potential impact of subpart 4
                                                    need not have a fully-approved NSR                      eliminating the requirement for states to              requirements to those that would be
                                                    program for purposes of redesignation,                  maintain a general conformity SIP.                     applicable to moderate nonattainment
                                                    provided that the area demonstrates                     Following this promulgation, EPA                       areas.
                                                    maintenance of the NAAQS without                        granted Ohio’s request to remove its                      Section 189(a) and (c) of subpart 4
                                                    part D NSR. A detailed rationale for this               general conformity regulations from the                applies to moderate nonattainment areas
                                                    view is described in a memorandum                       SIP. See 80 FR 29968. EPA confirms that                and includes the following: (1) An
                                                    from Mary Nichols, Assistant                            Ohio has met the applicable conformity                 approved permit program for
                                                    Administrator for Air and Radiation,                    requirements under section 176.                        construction of new and modified major
                                                    dated October 14, 1994, entitled, ‘‘Part                (iv) Subpart 4                                         stationary sources (section 189(a)(1)(A));
                                                    D New Source Review Requirements for                                                                           (2) an attainment demonstration (section
                                                    Areas Requesting Redesignation to                          On January 4, 2013, in Natural                      189(a)(1)(B)); (3) provisions for RACM
                                                    Attainment.’’ Ohio has demonstrated                     Resources Defense Council v. EPA, the                  (section 189(a)(1)(C)); and (4)
                                                    that the Cincinnati-Hamilton area will                  D.C. Circuit remanded to EPA the ‘‘Final               quantitative milestones demonstrating
                                                    be able to maintain the standard without                Clean Air Fine Particle Implementation                 RFP toward attainment by the
                                                    part D NSR in effect; therefore, the state              Rule’’ (72 FR 20586, April 25, 2007) and
                                                                                                                                                                   applicable attainment date (section
                                                    need not have a fully approved part D                   the ‘‘Implementation of the New Source
                                                                                                                                                                   189(c)).
                                                    NSR program prior to approval of the                    Review (NSR) Program for Particulate
                                                                                                                                                                      The permit requirements of subpart 4,
                                                    redesignation request. The state’s PSD                  Matter Less than 2.5 Micrometers
                                                                                                                                                                   as contained in section 189(a)(1)(A),
                                                    program will become effective in the                    (PM2.5)’’ final rule (73 FR 28321, May
                                                                                                                                                                   refer to and apply the subpart 1 permit
                                                    Cincinnati-Hamilton area upon                           16, 2008) (collectively, ‘‘1997 PM2.5
                                                                                                                                                                   provisions requirements of sections 172
                                                    redesignation to attainment. See                        Implementation Rule’’). 706 F.3d 428
                                                                                                                                                                   and 173 to PM10, without adding to
                                                    rulemakings for Detroit, Michigan (60                   (D.C. Cir. 2013). The Court found that
                                                                                                                                                                   them. Consequently, EPA believes that
                                                    FR 12467–12468, March 7, 1995);                         EPA erred in implementing the 1997
                                                                                                                                                                   section 189(a)(1)(A) does not itself
                                                    Cleveland-Akron-Lorain, Ohio (61 FR                     PM2.5 NAAQS pursuant to the general
                                                                                                                                                                   impose for redesignation purposes any
                                                    20458, 20469–20470, May 7, 1996);                       implementation provisions of subpart 1
                                                                                                            of part D of title I of the CAA, rather                additional requirements for moderate
                                                    Louisville, Kentucky (66 FR 53665,                                                                             areas beyond those contained in subpart
                                                    October 23, 2001); and Grand Rapids,                    than the particulate-matter-specific
                                                                                                            provisions of subpart 4 of part D of                   1.2 In any event, in the context of
                                                    Michigan (61 FR 31834–31837, June 21,                                                                          redesignation, EPA has long relied on
                                                    1996).                                                  title I.
                                                                                                               EPA has longstanding general                        the interpretation that a fully approved
                                                       Section 172(c)(6) requires the SIP to                                                                       nonattainment new source review
                                                    contain control measures necessary to                   guidance that interprets the 1990
                                                                                                            amendments to the CAA, making                          program is not considered an applicable
                                                    provide for attainment of the standard.                                                                        requirement for redesignation, provided
                                                    Because attainment has been reached,                    recommendations to states for meeting
                                                                                                            the statutory requirements for SIPs for                the area can maintain the standard with
                                                    no additional measures are needed to
                                                                                                            nonattainment areas. See, ‘‘State                      a PSD program after redesignation. A
                                                    provide for attainment.
                                                       Section 172(c)(7) requires the SIP to                Implementation Plans; General                          detailed rationale for this view is
                                                    meet the applicable provisions of                       Preamble for the Implementation of                     described in a memorandum from Mary
                                                    section 110(a)(2). As noted above, we                   Title I of the Clear Air Act Amendments                Nichols, Assistant Administrator for Air
                                                    have found that Ohio’s SIP meets the                    of 1990,’’ 57 FR 13498 (April 16, 1992)                and Radiation, dated October 14, 1994,
                                                    applicable requirements of section                      (the ‘‘General Preamble’’). In the General             entitled, ‘‘Part D New Source Review
                                                    110(a)(2) for purposes of redesignation.                Preamble, EPA discussed the                            Requirements for Areas Requesting
                                                                                                            relationship of subpart 1 and subpart 4                Redesignation to Attainment.’’ See also
                                                    (iii) Section 176 Conformity                            SIP requirements, and pointed out that                 rulemakings for Detroit, Michigan (60
                                                    Requirements                                            subpart 1 requirements were, to an                     FR 12467–12468, March 7, 1995);
                                                       Section 176(c) of the CAA requires                   extent, ‘‘subsumed by, or integrally                   Cleveland-Akron-Lorain, Ohio (61 FR
                                                    states to establish criteria and                        related to, the more specific PM–10                    20458, 20469–20470, May 7, 1996);
                                                    procedures to ensure that Federally-                    requirements.’’ 57 FR 13538 (April 16,                 Louisville, Kentucky (66 FR 53665,
                                                    supported or funded activities,                         1992). The subpart 1 requirements                      October 23, 2001); and Grand Rapids,
                                                    including highway projects, conform to                  include, among other things, provisions                Michigan (61 FR 31834–31837, June 21,
                                                    the air quality planning goals in the                   for attainment demonstrations, RACM,                   1996).
                                                    applicable SIPs. The requirement to                     RFP, emissions inventories, and                           With respect to the specific
                                                    determine conformity applies to                         contingency measures.                                  attainment planning requirements under
                                                    transportation plans, programs and                         For the purposes of this redesignation,             subpart 4,3 when EPA evaluates a
                                                    projects developed, funded or approved                  in order to identify any additional                    redesignation request under subpart 1
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                                                    under Title 23 of the U.S. Code and the                 requirements which would apply under                   and/or 4, any area that is attaining the
                                                    Federal Transit Act (transportation                     subpart 4, we are considering the                      PM2.5 standard is viewed as having
                                                    conformity) as well as to all other                     Cincinnati-Hamilton area to be a                       satisfied the attainment planning
                                                    Federally-supported or funded projects                  ‘‘moderate’’ PM2.5 nonattainment area.
                                                                                                                                                                     2 The potential effect of section 189(e) on section
                                                    (general conformity). State                             Under section 188 of the CAA, all areas
                                                                                                                                                                   189(a)(1)(A) for purposes of evaluating this
                                                    transportation conformity regulations                   designated nonattainment areas under                   redesignation is discussed below.
                                                    must be consistent with Federal                         subpart 4 would initially be classified                  3 I.e., attainment demonstration, RFP, RACM,

                                                    conformity regulations relating to                      by operation of law as ‘‘moderate’’                    milestone requirements, contingency measures.



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                                                                           Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                                    797

                                                    requirements for these subparts. For           of NOX from power plants, mobile                                ammonia, and (2) existing major
                                                    redesignations, EPA has for many years         sources, and other combustion sources.                          stationary sources of VOCs are
                                                    interpreted attainment-linked                     CAA section 189(e) specifically                              adequately controlled under other
                                                    requirements as not applicable for areas       provides that control requirements for                          provisions of the CAA regulating the
                                                    attaining the standard. In the General         major stationary sources of direct PM10                         ozone NAAQS.5 In the alternative, EPA
                                                    Preamble, EPA stated that:                     shall also apply to PM10 precursors from                        proposes to determine that, under the
                                                    The requirements for RFP will not apply in
                                                                                                   those   sources, except where EPA                               express exception provisions of section
                                                    evaluating a request for redesignation to      determines that major stationary sources                        189(e), and in the context of the
                                                    attainment since, at a minimum, the air        of such precursors ‘‘do not contribute                          redesignation of the area, which is
                                                    quality data for the area must show that the   significantly to PM10 levels which                              attaining the 1997 annual PM2.5
                                                    area has already attained. Showing that the    exceed the standard in the area.’’                              standard, at present ammonia and VOCs
                                                    State will make RFP towards attainment will,      For a number of reasons, EPA believes                        precursors from major stationary
                                                    therefore, have no meaning at that point.      that this proposed redesignation of the                         sources do not contribute significantly
                                                    ‘‘General Preamble for the Interpretation Cincinnati-Hamilton area is consistent                               to levels exceeding the 1997 PM2.5
                                                    of Title I of the CAA Amendments of            with the Court’s decision on this aspect                        standard in the Cincinnati-Hamilton
                                                    1990’’; (57 FR 13498, 13564, April 16,         of subpart 4. First, while the Court,                           area. See 57 FR 13539–42.
                                                    1992).                                         citing section 189(e), stated that ‘‘for a                         EPA notes that its 1997 PM2.5
                                                       The General Preamble also explained         PM10 area governed by subpart 4, a                              implementation rule provisions in 40
                                                    that:                                          precursor is ‘presumptively regulated,’ ’’                      CFR 51.1002 were not directed at
                                                                                                   the Court expressly declined to decide                          evaluation of PM2.5 precursors in the
                                                    [t]he section 172(c)(9) requirements are
                                                    directed at ensuring RFP and attainment by     the specific challenge to EPA’s 1997                            context of redesignation, but at SIP
                                                    the applicable date. These requirements no     PM2.5 implementation rule provisions                            plans and control measures required to
                                                    longer apply when an area has attained the     regarding ammonia and VOCs as                                   bring a nonattainment area into
                                                    standard and is eligible for redesignation.    precursors. The Court had no occasion                           attainment of the 1997 annual PM2.5
                                                    Furthermore, section 175A for maintenance      to reach whether and how it was                                 NAAQS. By contrast, redesignation to
                                                    plans . . . provides specific requirements for substantively necessary to regulate any                         attainment primarily requires the area to
                                                    contingency measures that effectively          specific precursor in a particular PM2.5                        have already attained due to permanent
                                                    supersede the requirements of section
                                                                                                   nonattainment area, and did not address                         and enforceable emission reductions,
                                                    172(c)(9) for these areas.
                                                                                                   what might be necessary for purposes of                         and to demonstrate that controls in
                                                    Id.                                            acting upon a redesignation request.                            place can continue to maintain the
                                                                                                      The Cincinnati-Hamilton area has                             standard. Thus, even if we regard the
                                                       EPA similarly stated in its September       attained the standard without any                               Court’s January 4, 2013, decision as
                                                    4, 1992 Calcagni memorandum                    specific additional controls of VOCs and                        calling for ‘‘presumptive regulation’’ of
                                                    (Calcagni memorandum) that, ‘‘[t]he            ammonia emissions from any sources in                           ammonia and VOCs for PM2.5 under the
                                                    requirements for reasonable further            the area.                                                       attainment planning provisions of
                                                    progress and other measures needed for            Precursors in subpart 4 are                                  subpart 4, those provisions do not
                                                    attainment will not apply for                  specifically regulated under the                                require additional controls of these
                                                    redesignations because they only have          provisions of section 189(e), which                             precursors for an area that already
                                                    meaning for areas not attaining the            requires, with important exceptions,                            qualifies for redesignation. Nor does
                                                    standard.’’                                    control requirements for major                                  EPA believe that requiring Ohio to
                                                       Elsewhere in this action, EPA               stationary sources of PM10 precursors.4                         address precursors differently than it
                                                    proposes to determine that the area has        As explained below, we do not believe                           has already would result in a different
                                                    attained the 1997 annual PM2.5                 that any additional controls of ammonia                         redesignation outcome.
                                                    standard. Under its longstanding               and VOCs are required in the context of                            Although, as EPA has emphasized, its
                                                    interpretation, EPA is proposing to            this redesignation.                                             consideration here of precursor
                                                    determine here that the area meets the            In the General Preamble, EPA                                 requirements under subpart 4 is in the
                                                    attainment-related plan requirements of discusses its approach to implementing                                 context of a redesignation to attainment,
                                                    subparts 1 and 4. Thus, EPA is                 section 189(e). See 57 FR 13538–13542.                          EPA’s existing interpretation of subpart
                                                    proposing to conclude that the                 With regard to precursor regulation                             4 requirements with respect to
                                                    requirements to submit an attainment           under section 189(e), the General                               precursors in attainment plans for PM10
                                                    demonstration under 189(a)(1)(B), a            Preamble explicitly stated that control                         contemplates that states may develop
                                                    RACM determination under sections              of VOCs under other CAA requirements                            attainment plans that regulate only
                                                    172(c)(1) and 189(a)(1)(c), a RFP              may suffice to relieve a state from the                         those precursors that are necessary for
                                                    demonstration under section 189(c)(1),         need to adopt precursor controls under                          purposes of attainment in the area in
                                                    and contingency measure requirements           section 189(e) (57 FR 13542). EPA                               question, i.e., states may determine that
                                                    under section 172(c)(9) are satisfied for      proposes to determine that Ohio has met                         only certain precursors need be
                                                    purposes of evaluating the redesignation the provisions of section 189(e) with                                 regulated for attainment and control
                                                    request.                                       respect to ammonia and VOCs as                                  purposes.6 Courts have upheld this
                                                       PM2.5 pollution can be emitted              precursors. This proposed supplemental
                                                    directly from a source (primary PM2.5) or determination is based on our findings                                 5 The Cincinnati-Hamilton area has reduced VOC

                                                    formed secondarily through chemical                                                                            emissions through the implementation of various
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                                                                                                   that: (1) The Cincinnati-Hamilton area                          SIP approved VOC control programs and various
                                                    reactions in the atmosphere involving          contains no major stationary sources of                         on-road and nonroad motor vehicle control
                                                    precursor pollutants emitted from a                                                                            programs.
                                                    variety of sources. Sulfates are a type of       4 Under either subpart 1 or subpart 4, for                      6 See, e.g., ‘‘Approval and Promulgation of

                                                    secondary particulate formed from SO2          purposes of demonstrating attainment as                         Implementation Plans for California—San Joaquin
                                                    emissions from power plants and                expeditiously as practicable, a state is required to            Valley PM–10 Nonattainment Area; Serious Area
                                                                                                   evaluate all economically and technologically                   Plan for Nonattainment of the 24-Hour and Annual
                                                    industrial facilities. Nitrates, another       feasible control measures for direct PM emissions               PM–10 Standards,’’ 69 FR 30006 (May 26, 2004)
                                                    common type of secondary particulate,          and precursor emissions, and adopt those measures               (approving a PM10 attainment plan that impose
                                                    are formed from combustion emissions           that are deemed reasonably available.                                                                   Continued




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                                                    798                     Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                    approach to the requirements of subpart                  inventories for the Cincinnati-Hamilton               cars; 18 percent for smaller SUVs, light
                                                    4 for PM10.7 EPA believes that                           area as meeting the requirement of                    trucks, and minivans; and 15 percent for
                                                    application of this approach to PM2.5                    section 172(c)(3) of the CAA.                         larger SUVs, vans, and heavier trucks.
                                                    precursors under subpart 4 is                                                                                     Heavy-Duty Diesel Engine Rule. EPA
                                                                                                             3. Permanent and Enforceable                          issued this rule in July 2000. This rule,
                                                    reasonable. Because the Cincinnati-
                                                                                                             Reductions in Emissions (Section                      which was phased in between 2004 and
                                                    Hamilton area has already attained the
                                                                                                             107(d)(3)(E)(iii))                                    2007, includes standards limiting the
                                                    1997 annual PM2.5 NAAQS with its
                                                    current approach to regulation of PM2.5                     EPA believes that Ohio has                         sulfur content of diesel fuel. This rule
                                                    precursors, EPA believes that, in the                    demonstrated that the observed air                    is estimated to reduce NOX emissions
                                                    context of this redesignation, there is no               quality improvement in the Cincinnati-                from diesel trucks and buses by
                                                    need to revisit the attainment control                   Hamilton area is due to permanent and                 approximately 40 percent. The level of
                                                    strategy with respect to the treatment of                enforceable reductions in emissions                   sulfur in highway diesel fuel is also
                                                    precursors. Even if the Court’s decision                 resulting from implementation of the                  estimated to have dropped by 97
                                                    is construed to impose an obligation to                  SIPs, Federal measures, and other state-              percent by mid-2006 due to this rule.
                                                    consider additional precursors under                     adopted measures.                                        Nonroad Diesel Rule. In May 2004,
                                                    subpart 4 in evaluating this                                In making this demonstration, Ohio                 EPA promulgated a new rule for large
                                                    redesignation request, it would not                      has calculated the change in emissions                nonroad diesel engines, such as those
                                                    affect EPA’s approval here of Ohio’s                     between 2005, one of the years used to                used in construction, agriculture, and
                                                    request for redesignation of the                         designate the area as nonattainment,                  mining equipment, to be phased in
                                                    Cincinnati-Hamilton area. Moreover, the                  and 2008, one of the years the                        between 2008 and 2014. Prior to 2006,
                                                    state has shown, and EPA is proposing                    Cincinnati-Hamilton area monitored                    nonroad diesel fuel averaged
                                                    to determine, that attainment in this                    attainment. The reduction in emissions                approximately 3,000 ppm sulfur. This
                                                    area is due to permanent and                             and the corresponding improvement in                  rule limited nonroad diesel sulfur
                                                    enforceable emissions reductions on all                  air quality over this time period can be              content to 15 ppm by 2010. It is
                                                    precursors necessary to provide for                      attributed to a number of regulatory                  estimated that compliance with this rule
                                                    continued attainment. It follows that no                 control measures that the Cincinnati-                 has cut emissions from nonroad diesel
                                                    further control of additional precursors                 Hamilton area and contributing areas                  engines by more than 90%. This rule
                                                    is necessary. Accordingly, EPA does not                  have implemented, as discussed below.                 achieved some emission reductions by
                                                    view the January 4, 2013, Court decision                                                                       2008 and was fully implemented by
                                                                                                             a. Permanent and Enforceable Controls                 2010. The reduction in fuel sulfur
                                                    as precluding redesignation of the                       Implemented
                                                    Cincinnati-Hamilton area to attainment                                                                         content also yielded an immediate
                                                    for the 1997 PM2.5 NAAQS at this time.                      The following is a discussion of                   reduction in sulfate particle emissions
                                                       EPA concludes that the area has met                   permanent and enforceable measures                    from all diesel vehicles.
                                                    all applicable requirements for purposes                 that have been implemented in the area:
                                                                                                                                                                   ii. Control Measures in Contributing
                                                    of redesignation in accordance with                      i. Federal Emission Control Measures                  Areas
                                                    section 107(d)(3)(E)(ii) and (v).
                                                                                                                Reductions in direct emissions of                     Given the significance of sulfates and
                                                    c. Fully Approved Applicable SIP                         PM2.5 and in emissions of PM2.5                       nitrates in the Cincinnati-Hamilton area,
                                                    Under Section 110(k) of the CAA                          precursors have occurred statewide and                the area’s air quality is strongly affected
                                                       Upon final approval of Ohio’s                         in upwind areas as a result of Federal                by regulated emissions from power
                                                    comprehensive VOCs and ammonia                           emission control measures, with                       plants.
                                                    emissions inventories, EPA will have                     additional emission reductions expected                  NOX SIP Call. On October 27, 1998 (63
                                                    fully approved the Ohio SIP for the                      to occur in the future. Federal emission              FR 57356), EPA issued a NOX SIP Call
                                                    Cincinnati-Hamilton area under section                   control measures include the following.               requiring the District of Columbia and
                                                    110(k) of the CAA for all requirements                      Tier 2 Emission Standards for                      22 states to reduce emissions of NOX.
                                                    applicable for purposes of                               Vehicles and Gasoline Sulfur Standards.               Affected states were required to comply
                                                    redesignation. EPA may rely on prior                     EPA finalized this Federal rule in                    with Phase I of the SIP Call beginning
                                                    SIP approvals in approving a                             February 2000. These emission control                 in 2004, and Phase II beginning in 2007.
                                                    redesignation request (See page 3 of the                 requirements result in lower NOX and                  Emission reductions resulting from
                                                    Calcagni memorandum; Southwestern                        SO2 emissions from new cars and light                 regulations developed in response to the
                                                    Pennsylvania Growth Alliance v.                          duty trucks, including sport utility                  NOX SIP Call are permanent and
                                                    Browner, 144 F.3d 984, 989–990 (6th                      vehicles. Emission standards                          enforceable.
                                                    Cir. 1998); Wall v. EPA, 265 F.3d 426                    established under EPA’s rules became                     CAIR and CSAPR. EPA proposed
                                                    (6th Cir. 2001)) plus any additional                     effective between 2004 and 2009. EPA                  CAIR on January 30, 2004, at 69 FR
                                                    measures it may approve in conjunction                   has estimated that, emissions of NOX                  4566, promulgated CAIR on May 12,
                                                    with a redesignation action. See 68 FR                   from new vehicles have decreased by                   2005, at 70 FR 25162, and promulgated
                                                    25413, 25426 (May 12, 2003). Since the                   the following percentages: Passenger                  associated Federal Implementation
                                                    passage of the CAA of 1970, Ohio has                     cars (light duty vehicles)—77 percent;                Plans (FIPs) on April 28, 2006, at 71 FR
                                                    adopted and submitted, and EPA has                       light duty trucks, minivans, and sports               25328, in order to reduce SO2 and NOX
                                                    fully approved, provisions addressing                    utility vehicles—86 percent; and, larger              emissions and improve air quality in
                                                    various required SIP elements under                      sports utility vehicles, vans, and heavier            many areas across the Eastern United
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                                                    particulate matter standards. In this                    trucks—69 to 95 percent. EPA expects                  States. However, on July 11, 2008, the
                                                    action, EPA is approving Ohio’s VOCs                     fleet-wide average emissions to decline               United States Court of Appeals for the
                                                    and ammonia comprehensive emissions                      by similar percentages as new vehicles                District of Columbia Circuit (D.C.
                                                                                                             replace older vehicles. The Tier 2                    Circuit or Court) issued its decision to
                                                    controls on direct PM10 and NOX emissions and did        standards also reduced the sulfur                     vacate and remand both CAIR and the
                                                    not impose controls on SO2, VOC, or ammonia
                                                    emissions).                                              content of gasoline by up to 90 percent.              associated CAIR FIPs in their entirety
                                                      7 See, e.g., Assoc. of Irritated Residents v. EPA et   VOCs emissions reductions will be                     (North Carolina v. EPA, 531 F.3d 836
                                                    al., 423 F.3d 989 (9th Cir. 2005).                       approximately 12 percent for passenger                (D.C. Cir. 2008)). EPA petitioned for a


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                                                                                   Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                                                             799

                                                    rehearing, and the Court issued an order                                   without vacating some of the CSAPR                                  Market’s acid rain database. These
                                                    remanding CAIR and the CAIR FIPs to                                        budgets as to a number of states. EME                               emissions reflect Ohio’s NOX emission
                                                    EPA without vacatur (North Carolina v.                                     Homer City Generation, L.P. v. EPA, 795                             budgets resulting from EPA’s NOX SIP
                                                    EPA, 550 F.3d 1176 (D.C. Cir. 2008)).                                      F.3d 118 (D.C. Cir. 2015) (EME Homer                                call. The 2008 emissions from EGUs
                                                    The Court, thereby, left CAIR in place in                                  City II). The litigation over CSAPR                                 reflect Ohio’s emission caps under
                                                    order to ‘‘temporarily preserve the                                        ultimately delayed implementation of                                CAIR. All other point source emissions
                                                    environmental values covered by CAIR’’                                     that rule for three years, from January 1,                          were obtained from Ohio’s source
                                                    until EPA replaced it with a rule                                          2012, when CSAPR’s cap-and-trade                                    facility emissions reporting.
                                                    consistent with the Court’s opinion (id.                                   programs were originally scheduled to                                  Area source emissions for the
                                                    at 1178). The Court directed EPA to                                        replace the CAIR cap-and-trade                                      Cincinnati-Hamilton area for 2005 were
                                                    ‘‘remedy CAIR’s flaws’’ consistent with                                    programs, to January 1, 2015. CSAPR’s                               taken from periodic emissions
                                                    the July 11, 2008, opinion, but declined                                   Phase 2 budgets were originally                                     inventories.8 These 2005 area source
                                                    to impose a schedule on EPA for                                            promulgated to begin on January 1,                                  emission estimates were extrapolated to
                                                    completing this action (id).                                               2014, and are now scheduled to begin                                2008. Source growth factors were
                                                       On August 8, 2011 (76 FR 48208),                                        on January 1, 2017. As part of the                                  supplied by LADCO. These growth
                                                    acting on the D.C. Circuit’s remand, EPA                                   remand, the D.C. Circuit found the Ohio                             factors were based on the U.S
                                                    promulgated CSAPR to replace CAIR                                          2014 NOX budget was invalid, stating                                Department of Commerce Bureau of
                                                    and, thus, to address the interstate                                       that based on EPA’s own data, Ohio                                  Economic Analysis (BEA) growth
                                                    transport of emissions contributing to                                     made no contribution to downwind                                    factors, with some updated local
                                                    nonattainment and interfering with                                         states’ nonattainment. On November 16,                              information.
                                                    maintenance of the two air quality                                         2015, EPA proposed the CSAPR Update                                    Nonroad mobile source emissions
                                                    standards covered by CAIR as well as                                       Rule (80 FR 75706) which, when                                      were extrapolated from nonroad mobile
                                                    the 2006 PM2.5 NAAQS. CSAPR requires                                       finalized, will establish permanent and                             source emissions reported in EPA’s
                                                    substantial reductions of SO2 and NOX                                      enforceable reduction through revised                               2005 National Emissions Inventory
                                                    emissions from electric generating units                                   NOX ozone season budgets for Ohio.                                  (NEI). Contractors were employed by
                                                    (EGUs) in 28 states in the eastern United                                     Because the emission reduction                                   LADCO to estimate emissions for
                                                    States. As a general matter, because                                       requirements of CAIR were enforceable                               commercial marine vessels and
                                                    CSAPR is CAIR’s replacement,                                               through the 2011 control period, and                                railroads.
                                                    emissions reductions associated with                                       because CSAPR has been promulgated
                                                    CAIR will for most areas be made                                                                                                                  On-road mobile source emissions
                                                                                                                               to address the requirements previously
                                                    permanent and enforceable through                                                                                                              were calculated using EPA’s mobile
                                                                                                                               addressed by CAIR and will achieve
                                                    implementation of CSAPR.                                                                                                                       source emission factor model,
                                                                                                                               similar or greater reductions once
                                                       Numerous parties filed petitions for                                                                                                        MOVES2010, in conjunction with
                                                                                                                               finalized, EPA has determined that the
                                                    review of CSAPR in the D.C. Circuit,                                                                                                           transportation model results developed
                                                                                                                               EGU emission reductions that helped
                                                    and on August 21, 2012, the court                                                                                                              by the Ohio-Kentucky-Indiana Regional
                                                                                                                               lead to attainment in the Cincinnati-
                                                    issued its ruling, vacating and                                                                                                                Council of Governments (OKI).
                                                                                                                               Hamilton area can now be considered
                                                    remanding CSAPR to EPA and ordering                                        permanent and enforceable and that the                                 All emissions estimates discussed
                                                    continued implementation of CAIR.                                          requirement of CAA section                                          below were documented in the
                                                    EME Homer City Generation, L.P. v.                                         107(d)(3)(E)(iii) has been met.                                     submittals and appendices to Ohio’s
                                                    EPA, 696 F.3d 7, 38 (D.C. Cir. 2012). The                                                                                                      redesignation request submittal of July
                                                    D.C. Circuit’s vacatur of CSAPR was                                        b. Emission Reductions                                              22, 2016. For these data and additional
                                                    reversed by the United States Supreme                                         Ohio developed an emissions                                      emissions inventory data, the reader is
                                                    Court on April 29, 2014, and the case                                      inventory for NOX, direct PM2.5, and                                referred to EPA’s digital docket for this
                                                    was remanded to the D.C. Circuit to                                        SO2 for 2005, one of the years used to                              rule, http://www.regulations.gov, for
                                                    resolve remaining issues in accordance                                     designate the area as nonattainment,                                docket number EPA–R05–OAR–2016–
                                                    with the high court’s ruling. EPA v. EME                                   and 2008, one of the years the                                      0479, which includes a digital copy of
                                                    Homer City Generation, L.P., 134 S. Ct.                                    Cincinnati-Hamilton area monitored                                  Ohio’s submittal.
                                                    1584 (2014).                                                               attainment of the standard.                                            Emissions data in tons per year (tpy)
                                                       On remand, the D.C. Circuit affirmed                                       Emissions of SO2 and NOX from EGUs                               for the Cincinnati-Hamilton area are
                                                    CSAPR in most respects, but invalidated                                    were derived from EPA’s Clean Air                                   shown in Tables 2, 3, and 4 below.

                                                               TABLE 2—COMPARISON OF 2005 EMISSIONS FROM THE NONATTAINMENT YEAR AND 2008 EMISSIONS FOR AN
                                                                                ATTAINMENT YEAR FOR NOX IN THE CINCINNATI-HAMILTON AREA


                                                                                                                                                                                                                                      Net change
                                                                                                                Sector                                                                         2005                 2008             (2008–2005)

                                                    EGU Point ........................................................................................................................          55,930.44            46,853.89           ¥9,076.55
                                                    Non-EGU .........................................................................................................................           10,371.70             9,790.50            ¥581.20
                                                    Non-road ..........................................................................................................................         12,417.57            10,561.92           ¥1,855.65
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                                                    Other (Area) .....................................................................................................................           7,810.74             7,975.67              164.93
                                                    Marine, Air, and Rail (MAR) ............................................................................................                     9,352.60             9,052.95            ¥299.65
                                                    On-road ............................................................................................................................        71,919.89            64,471.22           ¥7,448.67



                                                      8 Periodic emission inventories are derived by                           Federal Consolidated Emissions Reporting Rule,                      rule published on December 17, 2008, at 73 FR
                                                    states every three years and reported to EPA. These                        codified at 40 CFR Subpart A. EPA revised these                     76539.
                                                    periodic emission inventories are required by the                          and other emission reporting requirements in a final



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                                                    800                             Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                               TABLE 2—COMPARISON OF 2005 EMISSIONS FROM THE NONATTAINMENT YEAR AND 2008 EMISSIONS FOR AN
                                                                          ATTAINMENT YEAR FOR NOX IN THE CINCINNATI-HAMILTON AREA—Continued
                                                                                                                                                                 ector

                                                                                                                                                                                                                                    Net change
                                                                                                                 Sector                                                                          2005                 2008         (2008–2005)

                                                          Total ..........................................................................................................................       167,802.94           148,706.15     ¥19,096.79


                                                               TABLE 3—COMPARISON OF 2005 EMISSIONS FROM THE NONATTAINMENT YEAR AND 2008 EMISSIONS FOR AN
                                                                                ATTAINMENT YEAR FOR SO2 IN THE CINCINNATI-HAMILTON AREA


                                                                                                                                                                                                                                    Net change
                                                                                                                 Sector                                                                          2005                 2008         (2008–2005)

                                                    EGU Point ........................................................................................................................           218,395.56            98,334.17    ¥120,061.39
                                                    Non-EGU .........................................................................................................................             15,532.09            13,483.92     ¥2,048.17
                                                    Non-road ..........................................................................................................................            1,057.16               416.87       ¥640.29
                                                    Area .................................................................................................................................         3,494.39             3,520.77          26.38
                                                    MAR .................................................................................................................................          1,092.58               982.82       ¥109.76
                                                    On-road ............................................................................................................................             392.00               277.59       ¥114.41

                                                          Total ..........................................................................................................................       239,963.78           117,016.14    ¥122,947.64


                                                               TABLE 4—COMPARISON OF 2005 EMISSIONS FROM THE NONATTAINMENT YEAR AND 2008 EMISSIONS FOR AN
                                                                            ATTAINMENT YEAR FOR DIRECT PM2.5 IN THE CINCINNATI-HAMILTON AREA


                                                                                                                                                                                                                                    Net change
                                                                                                                 Sector                                                                          2005                 2008         (2008–2005)

                                                    EGU Point ........................................................................................................................             2,062.91             1,633.15        ¥429.76
                                                    Non-EGU .........................................................................................................................              1,352.79             1,458.52         105.73
                                                    Non-road ..........................................................................................................................              984.35               853.89        ¥130.46
                                                    Area .................................................................................................................................         1,828.85             1,864.80          35.95
                                                    MAR .................................................................................................................................            416.20               414.43         ¥1.77
                                                    On-road ............................................................................................................................           2,810.30             2,679.85        ¥130.45

                                                          Total ..........................................................................................................................         9,455.40             8,904.64        ¥550.76



                                                       Table 2 shows reductions in NOX                                          a. What is required in a maintenance                                 states that a maintenance plan should
                                                    emissions for the Cincinnati-Hamilton                                       plan?                                                                address the following items: The
                                                    area by 19,096.79 tpy between 2005                                                                                                               attainment emissions inventory, a
                                                    (nonattainment year) and 2008                                                  Section 175A of the CAA sets forth                                maintenance demonstration showing
                                                    (attainment year). Table 3 shows that                                       the required elements of a maintenance                               maintenance for the ten years of the
                                                    the Cincinnati-Hamilton area reduced                                        plan for areas seeking redesignation
                                                                                                                                                                                                     maintenance period, a commitment to
                                                    SO2 emissions by 122,947.64 tpy                                             from nonattainment to attainment.
                                                                                                                                                                                                     maintain the existing monitoring
                                                    between 2005 and 2008. Table 4 shows                                        Under section 175A, the plan must
                                                                                                                                                                                                     network, factors and procedures to be
                                                    reductions in direct PM2.5 emissions for                                    demonstrate continued attainment of
                                                                                                                                the applicable NAAQS for at least ten                                used for verification of continued
                                                    the Cincinnati-Hamilton area by 550.76                                                                                                           attainment of the NAAQS, and a
                                                    tpy between 2005 and 2008.                                                  years after EPA approves a
                                                                                                                                redesignation to attainment. Eight years                             contingency plan to prevent or correct
                                                    4. Maintenance Plan Pursuant to Section                                     after redesignation, the state must                                  future violations of the NAAQS.
                                                    175A of the CAA (Section                                                    submit a revised maintenance plan                                       Section 175A requires a state seeking
                                                    107(d)(3)(E)(iv))                                                           which demonstrates that attainment will                              redesignation to attainment to submit a
                                                       EPA has fully approved an applicable                                     continue to be maintained for ten years                              SIP revision to provide for the
                                                    maintenance plan that meets the                                             following the initial ten year                                       maintenance of the NAAQS in the area
                                                    requirements of section 175(a) on                                           maintenance period. To address the                                   ‘‘for at least 10 years after the
                                                    December 23, 2011. See 76 FR 80253. In                                      possibility of future NAAQS violations,                              redesignation.’’ EPA has interpreted this
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                                                    conjunction with Ohio’s request to                                          the maintenance plan must contain                                    as a showing of maintenance ‘‘for a
                                                    redesignate the Cincinnati-Hamilton                                         contingency measures with a schedule                                 period of ten years following
                                                    nonattainment area to attainment, Ohio                                      for implementation as EPA deems                                      redesignation.’’ Calcagni memorandum,
                                                    has submitted an updated attainment                                         necessary to assure prompt correction of                             p. 9. Where the emissions inventory
                                                    inventory of the maintenance plan to                                        any future PM2.5 violations.                                         method of showing maintenance is
                                                    reflect the provisions of subpart 4 (Title                                     The Calcagni memorandum provides                                  used, its purpose is to show that
                                                    I, Part D) of the CAA, and EPA is                                           additional guidance on the content of a                              emissions during the maintenance
                                                    updating the maintenance plan to 2027.                                      maintenance plan. The memorandum                                     period will not increase over the


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                                                                                   Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                                                                  801

                                                    attainment year inventory. Calcagni                                       emissions of NOX, directly emitted                                     beyond. PM2.5 emissions in the
                                                    memorandum, pp. 9–10.                                                     PM2.5 and SO2 in the area remain at or                                 nonattainment area are projected to
                                                       As discussed in detail in the section                                  below attainment year emission levels.                                 decrease by 270.09 tpy in 2015 and
                                                    below, the state’s maintenance plan                                       Section 175A requires a state seeking                                  702.01 tpy in 2021. NOX emissions in
                                                    submission expressly documents that                                       redesignation to attainment to submit a                                the nonattainment area are projected to
                                                    the area’s emissions inventories will                                     SIP revision to provide for the                                        decrease by 42,994.13 tpy in 2015 and
                                                    remain below the attainment year                                          maintenance of the NAAQS in the area                                   69,887.02 tpy in 2021. SO2 emissions in
                                                    inventories through 2021. In addition,                                    ‘‘for at least 10 years after the                                      the nonattainment area are projected to
                                                    for the reasons set forth below, EPA                                      redesignation.’’ EPA has interpreted this                              decline by 4,765.88 tpy in 2015 and
                                                    believes that the state’s submission, in                                  as a showing of maintenance ‘‘for a                                    28,505.87 in 2021. These rates of
                                                    conjunction with additional supporting                                    period of ten years following                                          decline are consistent with monitored
                                                    information, further demonstrates that                                    redesignation.’’ Calcagni memorandum,                                  and projected air quality trends; and
                                                    the area will continue to maintain the                                    p. 9. Where the emissions inventory                                    emissions reductions achieved through
                                                    1997 annual SO2 NAAQS at least                                            method of showing maintenance is                                       emissions controls and regulations that
                                                    through 2027. Thus, any EPA action to                                     used, its purpose is to show that                                      will remain in place beyond 2027, and
                                                    finalize its proposed approval of the                                     emissions during the maintenance                                       through fleet turnover that will continue
                                                    redesignation request and maintenance                                     period will not increase over the                                      beyond 2027, among other factors. EPA
                                                    plans in 2017, will be based on a                                         attainment year inventory. Calcagni                                    is proposing that the previously
                                                    showing, in accordance with section                                       memorandum, pp. 9–10.                                                  approved MVEBs are adequate for
                                                    175A, that the state’s maintenance plan                                      As discussed in detail in the section                               conformity purposes. See section 5
                                                    provides for maintenance for at least ten                                 below, Ohio’s maintenance plan                                         below for further details regarding
                                                    years after redesignation.                                                expressly documents that the area’s                                    MVEBs.
                                                                                                                              emissions inventories will remain below
                                                    b. Attainment Inventory                                                   the attainment year inventories through                                   A maintenance demonstration need
                                                       Ohio developed an emissions                                            2021. In addition, for the reasons set                                 not be based on modeling. See Wall v.
                                                    inventory for NOX, direct PM2.5, and                                      forth below, EPA believes that the                                     EPA, 265 F.3d 426 (6th Cir. 2001), Sierra
                                                    SO2 for 2008, one of the years in the                                     state’s submission, in conjunction with                                Club v. EPA, 375 F. 3d 537 (7th Cir.
                                                    period during which the Cincinnati-                                       additional supporting information,                                     2004). See also 66 FR 53094, 53099–
                                                    Hamilton area monitored attainment of                                     further demonstrates that the area will                                53100 (October 19, 2001), 68 FR 25413,
                                                    the 1997 annual PM2.5 standard, as                                        continue to maintain the PM2.5 standard                                25430–25432 (May 12, 2003). Ohio uses
                                                    described previously. The attainment                                      at least through 2027. Thus, if EPA                                    emissions inventory projections for the
                                                    level of emissions is summarized in                                       finalizes its proposed approval of the                                 years 2018 and 2021 to demonstrate
                                                    Tables 2, 3, and 4, above. Ohio also                                      redesignation request in 2017, it will be                              maintenance for the entire Cincinnati-
                                                    included emissions inventories for                                        based on a showing, in accordance with                                 Hamilton area. The projected emissions
                                                    VOCs and ammonia from 2007, in                                            section 175A, that the state’s                                         were estimated by Ohio, with assistance
                                                    accordance with the provisions of                                         maintenance plan provides for                                          from LADCO and OKI, who used the
                                                    Subpart 4 (Title I, Part D) of the CAA.                                   maintenance for at least ten years after                               MOVES2010 model for mobile source
                                                    These emissions are summarized in                                         redesignation.                                                         projections. Projection modeling of
                                                    Table 6, in discussion of the                                                Ohio’s plan demonstrates                                            inventory emissions was done for the
                                                    maintenance plan below.                                                   maintenance of the 1997 annual PM2.5                                   2018 interim year emissions using
                                                                                                                              NAAQS through 2021 by showing that                                     estimates based on the 2009 and 2018
                                                    c. Demonstration of Maintenance                                           current and future emissions of NOX,                                   LADCO modeling inventory, using
                                                       Ohio has a fully approved                                              directly emitted PM2.5 and SO2 for the                                 LADCO’s growth factors, for all sectors.
                                                    maintenance plan that meets the                                           area remain at or below attainment year                                The 2021 maintenance year emission
                                                    requirements of Section 175(A). See 76                                    emission levels.                                                       estimates were based on emissions
                                                    FR 80253. Along with the redesignation                                       The rate of decline in emissions of                                 estimates from the 2018 LADCO
                                                    request, Ohio submitted an updated                                        PM2.5, NOX, and SO2 from the                                           modeling. Table 5 shows the 2008
                                                    attainment inventory to reflect the                                       attainment year 2008 through 2021                                      attainment base year emission estimates
                                                    provision of subpart 4. Ohio’s plan                                       indicates that the emissions inventory                                 and the 2015 and 2021 emission
                                                    demonstrates maintenance of the 1997                                      levels not only significantly decline                                  projections for the Cincinnati-Hamilton
                                                    annual PM2.5 standard through 2021 by                                     between 2008 and 2021, but also will                                   area, taken from Ohio’s July 22, 2016,
                                                    showing that current and future                                           continue to decline through 2027 and                                   submission.

                                                         TABLE 5—COMPARISON OF 2008, 2015 AND 2021 NOX, DIRECT PM2.5, AND SO2 EMISSION TOTALS (tpy) FOR THE
                                                                                            CINCINNATI-HAMILTON AREA
                                                                                                                                                                                                   SO2                  NOX                 PM2.5

                                                    2008 (baseline) ...................................................................................................................     117,016.14 .......    148,706.15 .......    8,904.64.
                                                    2015 (interim) ......................................................................................................................   112,250.26 .......    105,712.02 .......    8,634.55.
                                                    2021 (maintenance) ............................................................................................................         88,510.27 .........   78,819.13 .........   8,202.63.
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                                                    Projected Decrease (2021–2008) .......................................................................................                  28,505.87 .........   69,887.02 .........   702.01.
                                                                                                                                                                                            24% decrease ..       47% decrease ..       8% decrease.



                                                      Table 5 shows that, for the period                                      emissions by 69,887.02 tpy; direct PM2.5                               significantly below attainment year
                                                    between 2008 and the maintenance                                          emissions by 702.01 tpy; and SO2                                       inventory levels, and, based on the rate
                                                    projection for 2021, the Cincinnati-                                      emissions by 28,505.87 tpy. The 2021                                   of decline, it is highly improbable that
                                                    Hamilton area will reduce NOX                                             projected emissions levels are                                         any increases in these levels will occur


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                                                    802                             Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                    in 2027 and beyond. Thus, the                                              EPA proposes to confirm that the                        Ohio’s maintenance plan shows that
                                                    emissions inventories set forth in Table                                state’s maintenance plan shows                          emissions of direct PM2.5, SO2, and NOX
                                                    5 show that the area will continue to                                   continued maintenance of the standard                   are projected to decrease by 702.01 tpy,
                                                    maintain the 1997 annual PM2.5                                          by tracking the levels of the precursors                28,505.87 tpy, and 69,887.022 tpy,
                                                    standard during the maintenance period                                  whose control brought about attainment                  respectively, over the maintenance
                                                    and at least through 2027.                                              of the 1997 PM2.5 standard in the                       period. See Table 5 above. In addition,
                                                      As Table 1 demonstrates, monitored                                    Cincinnati-Hamilton area. EPA therefore                 emissions inventories used in the
                                                    PM2.5 design value concentrations in the                                believes that the only additional                       regulatory impact analysis (RIA) for the
                                                    Cincinnati-Hamilton area are well below                                 consideration related to the                            2012 PM2.5 NAAQS show that VOCs and
                                                    the NAAQS in the years beyond 2008,                                     maintenance plan requirements that                      ammonia emissions are projected to
                                                    the attainment year for the area. Further,                              results from the Court’s January 4, 2013                decrease by 16,716 tpy and 119 tpy,
                                                    those values are trending downward as                                   decision is that of assessing the                       respectively between 2007 and 2020.
                                                    time progresses. Based on the future                                    potential role of VOCs and ammonia in                   See Table 6 below. While the RIA
                                                    projections of emissions in 2015 and                                    demonstrating continued maintenance                     emissions inventories are only projected
                                                    2021 showing significant emissions                                      in this area. As explained below, based                 out to 2020, there is no reason to believe
                                                    reductions in direct PM2.5, NOX, and                                    upon documentation provided by the                      that this downward trend would not
                                                    SO2, it is very unlikely that monitored                                 state and supporting information, EPA                   continue through 2027. Given that the
                                                    PM2.5 values in 2027 and beyond will                                    believes that the maintenance plan for                  Cincinnati-Hamilton area is already
                                                    show violations of the NAAQS.                                           the Cincinnati-Hamilton area need not                   attaining the 1997 annual PM2.5 NAAQS
                                                    Additionally, the 2013–2015 design                                      include any additional emission                         even with the current level of emissions
                                                    values, which range from 9.5 to 11.2 mg/                                reductions of VOCs or ammonia in order                  from sources in the area, the downward
                                                    m3, provide a sufficient margin in the                                  to provide for continued maintenance of                 trend of emissions inventories would be
                                                    unlikely event emissions rise slightly in                               the standard.                                           consistent with continued attainment.
                                                    the future.                                                               First, as noted above in EPA’s                        Indeed, projected emissions reductions
                                                                                                                            discussion of section 189(e), VOCs                      for the precursors that the state is
                                                    Maintenance Plan Evaluation of                                          emission levels in this area have                       addressing for purposes of the 1997
                                                    Ammonia and VOCs                                                        historically been well-controlled under                 PM2.5 NAAQS indicate that the area
                                                       With regard to the redesignation of                                  SIP requirements related to ozone and                   should continue to attain the NAAQS
                                                    the Cincinnati-Hamilton area, in                                        other pollutants. Second, total ammonia                 following the precursor control strategy
                                                    evaluating the effect of the Court’s                                    emissions throughout the Cincinnati-                    that the state has already elected to
                                                    remand of EPA’s implementation rule,                                    Hamilton area are very low, estimated to                pursue. Even if VOCs and ammonia
                                                    which included presumptions against                                     be less than 3,200 tpy. See Table 6                     emissions were to increase
                                                    consideration of VOCs and ammonia as                                    below. This amount of ammonia                           unexpectedly between 2020 and 2027,
                                                    PM2.5 precursors, EPA in this proposal                                  emissions appears especially small in                   the overall emissions reductions
                                                    is also considering the impact of the                                   comparison to the total amounts of SO2,                 projected in direct PM2.5, SO2, and NOX
                                                    decision on the maintenance plan                                        NOX, and even direct PM2.5 emissions                    would be sufficient to offset any
                                                    required under sections 175A and                                        from sources in the area. Third, as                     increases. For these reasons, EPA
                                                    107(d)(3)(E)(iv). To begin with, EPA                                    described below, available information                  believes that local emissions of all of the
                                                    notes that the area has attained the 1997                               shows that no precursor, including                      potential PM2.5 precursors will not
                                                    annual PM2.5 standard and that the state                                VOCs and ammonia, is expected to                        increase to the extent that they will
                                                    has shown that attainment of the                                        increase over the maintenance period so                 cause monitored PM2.5 levels to violate
                                                    standard is due to permanent and                                        as to interfere with or undermine the                   the 1997 PM2.5 standard during the
                                                    enforceable emission reductions.                                        state’s maintenance demonstration.                      maintenance period.

                                                      TABLE 6—COMPARISON OF 2007 AND 2020 VOC AND AMMONIA EMISSION TOTALS BY SOURCE SECTOR (tpy) FOR THE
                                                                                          CINCINNATI-HAMILTON AREA 9
                                                                                                                                                VOC                                                  Ammonia
                                                                              Sector                                                                            Net change                                        Net change
                                                                                                                            2007                2020                                  2007             2020
                                                                                                                                                                2020–2007                                         2020–2007

                                                    fires ..........................................................                 224               224                  0                  16            16             0
                                                    nonpoint ...................................................                  24,149            24,080               ¥69                2,158         2,223            65
                                                    nonroad ....................................................                   9,294             5,228             ¥4,066                  13            15             2
                                                    onroad ......................................................                 20,317             8,041            ¥12,275                 890           481          ¥409
                                                    point .........................................................                5,138             4,831              ¥306                  109           332           222

                                                          Total ..................................................                59,121            42,404            ¥16,716               3,186         3,067          ¥119
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                                                     In addition, available air quality                                     design values for the area range from 9.5               continue to decline through 2020. In the
                                                    modeling analyses show continued                                        to 11.2 mg/m3 (based on 2013–2015 air                   RIA analysis, the highest 2020 modeled
                                                    maintenance of the standard during the                                  quality data), which are well below the                 design value for the Cincinnati-
                                                    maintenance period. The current annual                                  1997 annual PM2.5 NAAQS of 15 mg/m3.                    Hamilton area is 10.5 mg/m3. Given that
                                                                                                                            Moreover, the modeling analysis                         precursor emissions are projected to
                                                      9 These emissions estimates were taken from the                       conducted for the RIA for the 2012                      decrease through 2027, it is reasonable
                                                    emissions inventories developed for the RIA for the                     PM2.5 NAAQS indicates that the design                   to conclude that monitored PM2.5 levels
                                                    2012 PM2.5 NAAQS which can be found in the
                                                    docket.                                                                 values for this area are expected to



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                                                                           Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                               803

                                                    in this area will also continue to                      measures to be adopted, a schedule and                 their precursors to address pollution
                                                    decrease through 2027.                                  procedure for adoption and                             from on-road transportation sources.
                                                       Thus, EPA believes that there is                     implementation of the contingency                      The MVEBs are the portions of the total
                                                    ample justification to conclude that the                measures, and a time limit for action by               allowable emissions that are allocated to
                                                    Cincinnati-Hamilton area should be                      the state. The state should also identify              highway and transit vehicle use that,
                                                    redesignated, even taking into                          specific indicators to be used to                      together with emissions from other
                                                    consideration the emissions of other                    determine when the contingency                         sources in the area, will provide for
                                                    precursors potentially relevant to PM2.5.               measures need to be adopted and                        attainment, RFP, or maintenance, as
                                                    After consideration of the D.C. Circuit’s               implemented. The maintenance plan                      applicable.
                                                    January 4, 2013 decision, and for the                   must include a requirement that the                       Under 40 CFR part 93, a MVEB for an
                                                    reasons set forth in this notice, EPA                   state will implement all pollution                     area seeking a redesignation to
                                                    proposes to approve the state’s revised                 control measures that were contained in                attainment is established for the last
                                                    attainment inventory into the previously                the SIP before redesignation of the area               year of the maintenance plan and could
                                                    approved maintenance plan.                              to attainment. See section 175A(d) of                  also be established for an interim year
                                                       Based on the information summarized                  the CAA. As described above in section                 or years. The MVEB serves as a ceiling
                                                    above, Ohio has adequately                              III.4, Ohio’s previously approved                      on emissions from an area’s planned
                                                    demonstrated maintenance of the 1997                    maintenance plan includes all necessary                transportation system. The MVEB
                                                    PM2.5 standard in this area for a period                contingency measures required under                    concept is further explained in the
                                                    extending in excess of ten years from                   section 175A(d). See 76 FR 80253.                      preamble to the November 24, 1993
                                                    expected final action on Ohio’s                            Ohio further commits to conduct                     transportation conformity rule (58 FR
                                                    redesignation request. EPA finds that                   ongoing review of its data, and if                     62188).
                                                    currently approved plan will provide for                monitored concentrations or emissions                     Under section 176(c) of the CAA, new
                                                    maintenance.                                            are trending upward, Ohio commits to                   transportation plans and transportation
                                                    d. Monitoring Network                                   take appropriate steps to avoid a                      improvement programs (TIPs) must be
                                                                                                            violation if possible. Ohio commits to                 evaluated to determine if they conform
                                                      Ohio’s approved maintenance plan                      continue implementing SIP                              to the purpose of the area’s SIP.
                                                    includes additional elements. Ohio’s                    requirements upon and after                            Conformity to the SIP means that
                                                    plan includes a commitment to continue                  redesignation.                                         transportation activities will not cause
                                                    to operate its EPA-approved monitoring                     EPA believes that Ohio’s approved                   new air quality violations, worsen
                                                    network, as necessary to demonstrate                    contingency measures, as well as the                   existing air quality violations, or delay
                                                    ongoing compliance with the NAAQS.                      commitment to continue implementing                    timely attainment of the NAAQS or any
                                                    As detailed above, there are nine                       any SIP requirements, satisfy the                      required interim milestone. If a
                                                    monitors measuring PM2.5                                pertinent requirements of section                      transportation plan or TIP does not
                                                    concentrations in the Cincinnati-                       175A(d).                                               conform, most new transportation
                                                    Hamilton area, and eight of the nine are                   As required by section 175A(b) of the               projects that would expand the capacity
                                                    operated by Ohio. The one other                         CAA, Ohio commits to submit to EPA                     of roadways cannot go forward.
                                                    monitor is located in Kentucky.                         an updated PM2.5 maintenance plan                      Regulations at 40 CFR part 93 set forth
                                                    e. Verification of Continued Attainment                 eight years after redesignation of the                 EPA policy, criteria, and procedures for
                                                                                                            Cincinnati-Hamilton area to cover an                   demonstrating and assuring conformity
                                                       Ohio remains obligated to continue to
                                                                                                            additional ten year period beyond the                  of such transportation activities to a SIP.
                                                    quality-assure monitoring data and enter
                                                                                                            initial ten year maintenance period. As                   When reviewing SIP revisions
                                                    all data into the AQS in accordance
                                                                                                            required by section 175A of the CAA,                   containing MVEBs, including
                                                    with Federal guidelines. Ohio will use
                                                                                                            Ohio has also committed to retain the                  attainment strategies, rate-of-progress
                                                    these data, supplemented with
                                                                                                            PM2.5 control measures contained in the                plans, and maintenance plans, EPA
                                                    additional information as necessary, to
                                                                                                            SIP prior to redesignation.                            must affirmatively find adequate and/or
                                                    assure that the area continues to attain                   For all of the reasons set forth above,
                                                    the standard. Ohio will also continue to                                                                       approve the MVEBs for use in
                                                                                                            EPA determines that the approved                       determining transportation conformity
                                                    develop and submit periodic emission                    maintenance plan is still applicable and
                                                    inventories as required by the Federal                                                                         before the MVEBs can be used. Once
                                                                                                            meets all the contingency plan                         EPA affirmatively approves and/or finds
                                                    Consolidated Emissions Reporting Rule                   requirements of CAA section 175A.
                                                    (67 FR 39602, June 10, 2002) to track                                                                          the submitted MVEBs to be adequate for
                                                    future levels of emissions. Both of these               5. Motor Vehicle Emissions Budget                      transportation conformity purposes, the
                                                    actions will help to verify continued                   (MVEBs) for the Mobile Source                          MVEBs must be used by state and
                                                    attainment in accordance with 40 CFR                    Contribution to PM2.5 and NOX                          Federal agencies in determining
                                                    part 58.                                                                                                       whether proposed transportation plans
                                                                                                            a. How are MVEBs developed and what                    and TIPs conform to the SIP as required
                                                    f. Contingency Plan                                     are the MVEBs for the Cincinnati-                      by section 176(c) of the CAA. EPA’s
                                                       The contingency plan provisions are                  Hamilton area?                                         substantive criteria for determining the
                                                    designed to promptly correct or prevent                   Under the CAA, states are required to                adequacy of MVEBs are set out in 40
                                                    a violation of the NAAQS that might                     submit, at various times, control strategy             CFR 93.118(e)(4). Additionally, to
                                                    occur after redesignation of an area to                 SIP revisions and maintenance plans for                approve a MVEB, EPA must complete a
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                                                    attainment. Section 175A of the CAA                     PM2.5 nonattainment areas and for areas                thorough review of the SIP and
                                                    requires that a maintenance plan                        seeking redesignation to attainment of                 conclude that the SIP will achieve its
                                                    include such contingency measures as                    the PM2.5 standard. These emission                     overall purpose. In this case, EPA must
                                                    EPA deems necessary to assure that the                  control strategy SIP revisions (e.g., RFP              review Ohio’s PM2.5 maintenance plan
                                                    state will promptly correct a violation of              and attainment demonstration SIP                       and conclude that it will provide for
                                                    the NAAQS that occurs after                             revisions) and maintenance plans create                maintenance of the 1997 annual PM2.5
                                                    redesignation. The maintenance plan                     MVEBs based on on-road mobile source                   standard in the Cincinnati-Hamilton
                                                    should identify the contingency                         emissions for criteria pollutants and/or               area.


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                                                    804                    Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules

                                                       The maintenance plans previously                     determined that the area can maintain                  section 107(d)(3)(E) of the CAA. EPA is
                                                    submitted by Ohio for the area                          attainment of the 1997 annual PM2.5                    thus proposing to grant Ohio’s request
                                                    contained PM2.5 and NOX MVEBs for the                   NAAQS for the relevant maintenance                     to change the designation of its portion
                                                    area for the year 2021. Ohio calculated                 period and no changes to the plan have                 of the Cincinnati-Hamilton area from
                                                    the MVEBs using MOVES2010. These                        been made. See 76 FR 80253.                            nonattainment to attainment for the
                                                    approved budgets are used in future                                                                            1997 annual PM2.5 NAAQS.
                                                                                                            6. Comprehensive Emissions Inventory
                                                    conformity determinations and regional                                                                            If finalized, approval of the
                                                    emissions analyses prepared by the OKI,                    As discussed above, section 172(c)(3)               redesignation request would change the
                                                    and will have to be based on the use of                 of the CAA requires areas to submit a                  official designation of the Ohio portion
                                                    MOVES2010 or the most recent version                    comprehensive emissions inventory                      of the Cincinnati-Hamilton area for the
                                                    of MOVES required to be used in                         including direct PM and all four                       1997 annual PM2.5 NAAQS, found at 40
                                                    transportation conformity                               precursors (SO2, NOX, VOCs, and                        CFR part 81, from nonattainment to
                                                    determinations.10 The state has                         ammonia). EPA approved the Ohio 2005                   attainment. If finalized, EPA would
                                                    determined the 2021 MVEBs for the                       base year emissions inventory on                       determine that the previously approved
                                                    combined Ohio and Indiana portions of                   December 23, 2011 (76 FR 80253). This                  maintenance plan is still applicable to
                                                    the Cincinnati-Hamilton area to be                      previously approved base year                          the Cincinnati-Hamilton area for the
                                                    1,241.19 tpy for primary PM2.5 and                      emissions inventory detailed emissions                 1997 annual PM2.5 NAAQS.
                                                    21,747.71 tpy for NOX. The Ohio and                     of PM2.5, SO2, and NOX for 2005.
                                                    Indiana portion of the area included                    Emissions inventories for VOCs and                     V. Statutory and Executive Order
                                                    ‘‘safety margins’’ as provided for in 40                ammonia from 2007, taken from the RIA                  Reviews
                                                    CFR 93.124(a) (described below) of                      for the 2012 PM2.5 NAAQS, have been                       Under the CAA, redesignation of an
                                                    112.84 tpy for primary PM2.5 and                        added as part of this submittal in                     area to attainment and the
                                                    2,836.65 tpy for NOX in the 2021                        accordance with the provisions of                      accompanying approval of a
                                                    MVEBs, respectively, to provide for on-                 subpart 4 (Title I, Part D) of the CAA.                maintenance plan under section
                                                    road mobile source growth. Ohio did                     Emissions contained in the submittal                   107(d)(3)(E) are actions that affect the
                                                    not provide emission budgets for SO2,                   cover the general source categories of                 status of a geographical area and do not
                                                    VOCs, and ammonia because it                            point sources, area sources, on-road                   impose any additional regulatory
                                                    concluded, consistent with EPA’s                        mobile sources, and nonroad mobile                     requirements on sources beyond those
                                                    presumptions regarding these                            sources.                                               imposed by state law. A redesignation to
                                                    precursors, that emissions of these                        Based upon EPA’s previous action                    attainment does not in and of itself
                                                    precursors from on-road motor vehicles                  and 2007 emissions inventory for VOCs                  create any new requirements, but rather
                                                    are not significant contributors to the                 and ammonia, the emissions inventory                   results in the applicability of
                                                    area’s PM2.5 air quality problem.                       was complete and accurate, and met the                 requirements contained in the CAA for
                                                       In the Cincinnati-Hamilton area, the                 requirement of CAA section 172(c)(3).                  areas that have been redesignated to
                                                    motor vehicle budgets including the                                                                            attainment. Moreover, the Administrator
                                                                                                            IV. EPA’s Proposed Actions
                                                    safety margins and motor vehicle                                                                               is required to approve a SIP submission
                                                    emission projections for both NOX and                     EPA is proposing to take several
                                                                                                                                                                   that complies with the provisions of the
                                                    PM2.5 are equal to the levels in the                    actions related to redesignation of the
                                                                                                                                                                   CAA and applicable Federal regulations.
                                                    attainment year.                                        Cincinnati-Hamilton area to attainment
                                                                                                                                                                   42 U.S.C. 7410(k); 40 CFR 52.02(a).
                                                       EPA has reviewed the previously                      for the 1997 annual PM2.5 NAAQS.
                                                                                                               EPA has previously approved Ohio’s                  Thus, in reviewing SIP submissions,
                                                    approved budgets for 2021 including the                                                                        EPA’s role is to approve state choices,
                                                    added safety margins using the                          PM2.5 maintenance plan and MVEBs for
                                                                                                            the Cincinnati-Hamilton area. EPA is                   provided that they meet the criteria of
                                                    conformity rule’s adequacy criteria                                                                            the CAA. Accordingly, this action
                                                    found at 40 CFR 93.118(e)(4) and the                    proposing to determine that this plan
                                                                                                            and budgets are still applicable.                      merely proposes to approve state law as
                                                    conformity rule’s requirements for                                                                             meeting Federal requirements and, if
                                                    safety margins found at 40 CFR                            EPA has previously approved the
                                                                                                            2005 primary PM2.5, NOX, and SO2 base                  finalized, will not impose additional
                                                    93.124(a). EPA has reviewed the                                                                                requirements beyond those imposed by
                                                    approved budgets and the maintenance                    year emissions inventory. EPA is
                                                                                                            proposing to approve Ohio’s updated                    state law. For that reason, this actions:
                                                    plan, and EPA is determining that the                                                                             • Is not a significant regulatory action
                                                    2021 direct PM2.5 and NOX budgets,                      emissions inventory which includes
                                                                                                            emissions inventories for VOCs and                     subject to review by the Office of
                                                    including the requested safety margins                                                                         Management and Budget under
                                                    for the Cincinnati-Hamilton area, are                   ammonia from 2007. EPA is proposing
                                                                                                            that Ohio meets the emissions inventory                Executive Orders 12866 (58 FR 51735,
                                                    adequate for use in conformity.                                                                                October 4, 1993) and 13563 (76 FR 3821,
                                                                                                            requirement under section
                                                    b. What action is EPA taking on the                     107(d)(3)(E)(iii).                                     January 21, 2011);
                                                    submitted motor vehicle emissions                          EPA is proposing to approve the                        • Does not impose an information
                                                    budgets?                                                RACM/RACT portion of Ohio’s prior                      collection burden under the provisions
                                                       EPA previously approved Ohio’s                       Cincinnati-Hamilton area attainment                    of the Paperwork Reduction Act (44
                                                    MVEBs for use to determine                              plan SIP revision as providing adequate                U.S.C. 3501 et seq.);
                                                    transportation conformity in the                        RACM/RACT consistent with the                             • Is certified as not having a
                                                                                                            provisions of 40 CFR 51.1010(b),                       significant economic impact on a
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                                                    Cincinnati-Hamilton area and these
                                                    budgets remain applicable. EPA has                      because Ohio has demonstrated with a                   substantial number of small entities
                                                                                                            RACM/RACT analysis that no further                     under the Regulatory Flexibility Act (5
                                                       10 EPA described the circumstances under which       control measures would advance the                     U.S.C. 601 et seq.);
                                                    an area would be required to use MOVES in               attainment date in the area.                              • Does not contain any unfunded
                                                    transportation conformity determinations in its            EPA is proposing that Ohio meets the                mandate or significantly or uniquely
                                                    March 2, 2010, Federal Register notice officially
                                                    releasing MOVES2010 for use in SIPs and
                                                                                                            requirements for redesignation of the                  affect small governments, as described
                                                    transportation conformity determinations. (75 FR        Cincinnati-Hamilton area to attainment                 in the Unfunded Mandates Reform Act
                                                    9413)                                                   of the 1997 annual PM2.5 NAAQS under                   of 1995 (Pub. L. 104–4);


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                                                                           Federal Register / Vol. 82, No. 2 / Wednesday, January 4, 2017 / Proposed Rules                                                         805

                                                       • Does not have Federalism                           SURFACE TRANSPORTATION BOARD                           recently been adopted 1 and that those
                                                    implications as specified in Executive                                                                         procedures would provide grain
                                                    Order 13132 (64 FR 43255, August 10,                    49 CFR Part 1300                                       shippers with a new avenue for rate
                                                    1999);                                                                                                         relief. Rail Transp. of Grain, EP 665, slip
                                                                                                                                                                   op. at 5 (STB served Jan. 14, 2008). The
                                                       • Is not economically significant                    [Docket No. EP 528 (Sub-No. 1); Docket No.
                                                                                                            EP 665 (Sub-No. 1)]                                    Board noted, however, that it would
                                                    regulatory action based on health or
                                                                                                                                                                   continue to monitor the relationship
                                                    safety risks subject to Executive Order                 Publication Requirements for                           between carriers and grain interests, and
                                                    13045 (62 FR 19885, April 23, 1997);                    Agricultural Products; Rail                            that, if future regulatory action were
                                                       • Is not a significant regulatory action             Transportation of Grain, Rate                          warranted, it would open a new
                                                    subject to Executive Order 13211 (66 FR                 Regulation Review                                      proceeding. Id. at 5.
                                                    28355, May 22, 2001);                                                                                             In Rate Regulation Reforms, EP 715
                                                                                                            AGENCY:  Surface Transportation Board.                 (STB served July 25, 2012), the Board
                                                       • Is not subject to requirements of
                                                                                                            ACTION: Notice of proposed rulemaking;                 proposed several changes to its rate
                                                    Section 12(d) of the National
                                                                                                            policy statement.                                      reasonableness rules. However, based
                                                    Technology Transfer and Advancement                                                                            on the comments received in that docket
                                                    Act of 1995 (15 U.S.C. 272 note) because                SUMMARY:    Through this Notice of                     from grain shipper interests, which in
                                                    application of those requirements would                 Proposed Rulemaking, the Surface                       part stated that the proposed changes
                                                    be inconsistent with the Clean Air Act;                 Transportation Board (Board or STB)                    did not provide meaningful relief to
                                                    and                                                     proposes amendments to its regulations                 grain shippers, the Board commenced a
                                                       • Does not provide EPA with the                      governing the publication, availability,               separate proceeding in Rail
                                                    discretionary authority to address, as                  and retention for public inspection of                 Transportation of Grain, Rate
                                                    appropriate, disproportionate human                     rail carrier rate and service terms for                Regulation Review, Docket No. EP 665
                                                    health or environmental effects, using                  agricultural products and fertilizer. The              (Sub-No. 1) in December 2013 to deal
                                                    practicable and legally permissible                     Board also clarifies its policies on                   specifically with the concerns of grain
                                                    methods, under Executive Order 12898                    standing and aggregation of claims as                  shippers. The Board invited public
                                                    (59 FR 7629, February 16, 1994).                        they relate to rate complaint procedures.              comment on how to ensure that the
                                                                                                            DATES: Comments are due February 21,
                                                                                                                                                                   Board’s existing rate complaint
                                                       In addition, the SIP is not approved                                                                        procedures are accessible to grain
                                                    to apply on any Indian reservation land                 2017; replies are due by March 20, 2017.
                                                                                                                                                                   shippers and provide effective
                                                    or in any other area where EPA or an                    ADDRESSES: Comments may be                             protection against unreasonable freight
                                                    Indian tribe has demonstrated that a                    submitted either via the Board’s e-filing              rail transportation rates. The Board also
                                                    tribe has jurisdiction. In those areas of               format or in the traditional paper                     sought input from interested parties on
                                                    Indian country, this rule does not have                 format. Any person using e-filing should               grain shippers’ ability to effectively seek
                                                    tribal implications as specified by                     attach a document and otherwise                        relief for unreasonable rates, including
                                                    Executive Order 13175 (65 FR 67249,                     comply with the instructions at the E–                 proposals for modifying existing
                                                    November 9, 2000), because                              FILING link on the Board’s Web site, at                procedures, or new alternative rate relief
                                                    redesignation is an action that affects                 http://www.stb.gov. Any person                         methodologies, should they be
                                                    the status of a geographical area and                   submitting a filing in the traditional                 necessary. The Board received
                                                                                                            paper format should send an original                   comments and replies from numerous
                                                    does not impose any new regulatory
                                                                                                            and 10 copies to: Surface Transportation               parties.
                                                    requirements on tribes, impact any
                                                                                                            Board, Attn: Docket No. EP 528 (Sub-                      On May 8, 2015, the Board announced
                                                    existing sources of air pollution on                    No. 1), 395 E Street SW., Washington,                  that it would hold a public hearing, and
                                                    tribal lands, nor impair the maintenance                DC 20423–0001. Copies of written                       invited parties to discuss rate
                                                    of ozone national ambient air quality                   comments will be available for viewing                 reasonableness accessibility for grain
                                                    standards in tribal lands.                              and self-copying at the Board’s Public                 shippers, as well as other issues,
                                                    List of Subjects                                        Docket Room, Room 131, and will be                     including: Whether the Board should
                                                                                                            posted to the Board’s Web site.                        allow multiple agricultural farmers and
                                                    40 CFR Part 52                                                                                                 other agricultural shippers to aggregate
                                                                                                            FOR FURTHER INFORMATION CONTACT:
                                                                                                            Sarah Fancher at (202) 245–0355.                       their distinct rate claims against the
                                                      Environmental protection, Air                                                                                same carrier into a single proceeding,
                                                    pollution control, Incorporation by                     Assistance for the hearing impaired is
                                                                                                            available through the Federal                          and whether the disclosure requirement
                                                    reference, Intergovernmental relations,                                                                        for agricultural tariff rates should be
                                                    Particulate matter.                                     Information Relay Service (FIRS) at 1–
                                                                                                            800–877–8339.                                          modified to allow for increased
                                                    40 CFR Part 81                                                                                                 transparency. The public hearing was
                                                                                                            SUPPLEMENTARY INFORMATION: In                          held on June 10, 2015, and the Board
                                                      Environmental protection, Air                         November 2006, the Board held a                        received post-hearing supplemental
                                                    pollution control, National parks,                      hearing in Rail Transportation of Grain,               comments from interested parties
                                                    Wilderness areas.                                       Docket No. EP 665, as a forum for                      through June 24, 2015.
                                                                                                            interested persons to provide views and                   Although much of the commentary
                                                      Dated: December 13, 2016.                             information about grain transportation                 and testimony received pertained to
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                                                    Robert Kaplan,                                          markets. The hearing was prompted by                   existing or proposed rate relief
                                                    Acting Regional Administrator, Region 5.                concerns regarding rates and service                   methodologies for agricultural
                                                    [FR Doc. 2016–31635 Filed 1–3–17; 8:45 am]              issues related to the movement of grain                commodity shippers, the comments and
                                                    BILLING CODE 6560–50–P
                                                                                                            raised by Members of Congress, grain
                                                                                                            producers, and other stakeholders. In                    1 Simplified Standards for Rail Rate Cases, EP

                                                                                                            January 2008, the Board closed that                    646 (Sub-No. 1) (STB served Sept. 5, 2007), aff’d
                                                                                                                                                                   sub nom. CSX Transp., Inc. v. STB, 568 F.3d 236
                                                                                                            proceeding, reasoning that guidelines                  (D.C. Cir.), vacated in part on reh’g, 584 F.3d 1076
                                                                                                            for simplified rate procedures had                     (D.C. Cir. 2009).



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Document Created: 2017-01-04 00:29:30
Document Modified: 2017-01-04 00:29:30
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 February 3, 2017.
ContactJoseph Ko, Environmental Engineer, Attainment Planning and Maintenance Section, Air Programs Branch (AR- 18J), Environmental Protection Agency, Region 5, 77 West Jackson Boulevard, Chicago, Illinois 60604, (312) 886-7947, [email protected]
FR Citation82 FR 792 
CFR Citation40 CFR 52
40 CFR 81
CFR AssociatedEnvironmental Protection; Air Pollution Control; Incorporation by Reference; Intergovernmental Relations; Particulate Matter; National Parks and Wilderness Areas

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