Document ID: EPA-R01-OAR-2019-0513-0001
Agency: epa
Document Type: Proposed Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: Connecticut; Transport State Implementation Plan for the 2008 Ozone Standard.
Posted Date: 2019-12-26T05:00Z

[Federal Register Volume 84, Number 247 (Thursday, December 26, 2019)]
[Proposed Rules]
[Pages 70913-70916]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-27765]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R01-OAR-2019-0513; FRL-10003-57-Region 1]

Air Plan Approval; Connecticut; Transport State Implementation 
Plan for the 2008 Ozone Standard

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve a State Implementation Plan (SIP) revision submitted by the 
State of Connecticut that addresses the interstate transport of air 
pollution requirements of the Clean Air Act for the 2008 ozone national 
ambient air quality standards (NAAQS) (i.e., ozone transport SIP). The 
intended effect of this action is to propose approval of the transport 
SIP as a revision to the Connecticut SIP. This action is being taken in 
accordance with the Clean Air Act.

DATES: Written comments must be received on or before January 27, 2020.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R01-
OAR-2019-0513 at https://www.regulations.gov, or via email to 
simcox.alison@epa.gov. For comments submitted at Regulations.gov, 
follow the online instructions for submitting comments. Once submitted, 
comments cannot be edited or removed from Regulations.gov. For either 
manner of submission, the EPA may publish any comment received to its 
public docket. Do not submit electronically any information you 
consider to be Confidential Business Information (CBI) or other 
information whose disclosure is restricted by statute. Multimedia 
submissions (audio, video, etc.) must be accompanied by a written 
comment. The written comment is considered the official comment and 
should include discussion of all points you wish to make. The EPA will 
generally not consider comments or comment contents located outside of 
the primary submission (i.e., on the web, cloud, or other file sharing 
system). For additional submission methods, 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://www.epa.gov/dockets/commenting-epa-dockets. Publicly 
available docket materials are available at https://www.regulations.gov 
or at the U.S. Environmental Protection Agency, EPA Region 1 Regional 
Office, Air and Radiation Division, 5 Post Office Square--Suite 100, 
Boston, MA. EPA requests that if at all possible, you contact the 
contact listed in the FOR FURTHER INFORMATION CONTACT section to 
schedule your inspection. The Regional Office's official hours of 
business are Monday through Friday, 8:30 a.m. to 4:30 p.m., excluding 
legal holidays.

FOR FURTHER INFORMATION CONTACT: Alison C. Simcox, Air Quality Branch, 
U.S. Environmental Protection Agency, EPA Region 1, 5 Post Office 
Square--Suite 100, (Mail code 05-2), Boston, MA 02109-3912, tel. (617) 
918-1684, email simcox.alison@epa.gov.

SUPPLEMENTARY INFORMATION:  Throughout this document whenever ``we,'' 
``us,'' or ``our'' is used, we mean EPA.

Table of Contents

I. Background
II. EPA's Evaluation of Connecticut's Submittal
III. Proposed Action
IV. Statutory and Executive Order Reviews

I. Background

    On June 15, 2015, the Connecticut Department of Energy and 
Environmental Protection (CT DEEP) submitted a revision to its State 
Implementation Plan (SIP) consisting of an interstate transport SIP for 
the 2008 ozone NAAQS. This interstate transport SIP, which we are 
herein proposing to approve, was submitted to address the 
infrastructure requirements of section 110(a)(2)(D)(i)(I) of the Clean 
Air Act (CAA or Act).
    On March 12, 2008, EPA revised the level of the primary ozone 
standard from 0.08 ppm to 0.075 ppm, based on a three-year average of 
the annual

[[Page 70914]]

fourth-highest daily maximum 8-hour average. See 73 FR 16436. Section 
110(a)(1) of the CAA requires states to submit SIPs to address a new or 
revised NAAQS within three years after promulgation of a standard, or 
within a shorter period as EPA may prescribe. Section 110(a)(2) lists 
the elements that new SIPs must address, as applicable, including 
section 110(a)(2)(D)(i), which pertains to interstate transport of 
certain emissions.
    Section 110(a)(2)(D)(i) identifies four elements related to the 
evaluation of impacts of interstate transport of air pollutants; in 
this rulemaking, we are addressing the first two elements; EPA 
addressed all other infrastructure SIP elements under section 110(a)(2) 
for Connecticut for the 2008 8-hour ozone NAAQS in separate 
rulemakings.\1\ Specifically, the portions that we are proposing to 
approve pertain to section 110(a)(2)(D)(i)(I): (1) Significant 
contribution to nonattainment of the ozone NAAQS in any other state 
(commonly called ``prong 1''); and (2) interference with maintenance of 
the ozone NAAQS (commonly called ``prong 2'') by any other state. These 
two provisions (or ``prongs'') are commonly referred to as the ``good 
neighbor'' provisions of the CAA. The first provision requires that a 
state's SIP for a new or revised NAAQS contain adequate measures to 
prohibit any source or other type of emissions activity in the state 
from emitting pollutants in amounts that will ``contribute 
significantly'' to nonattainment of the NAAQS in another state. The 
second provision requires that a state's SIP prohibit any source or 
other type of emissions activity in the state from emitting pollutants 
in amounts that will ``interfere with maintenance'' of the applicable 
NAAQS in any other state.
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    \1\ See 80 FR 54471 (September 10, 2015); 81 FR 35636 (June 3, 
2016).
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EPA's Analysis Related to 110(a)(2)(D)(i)(I) for the 2008 8-Hour Ozone 
NAAQS

    EPA developed technical information and related analyses to assist 
states with meeting section 110(a)(2)(D)(i)(I) requirements for the 
2008 8-hour ozone NAAQS through SIPs and, as appropriate, to provide 
backstop federal implementation plans (FIPs) in the event that states 
failed to submit approvable SIPs.\2\ On October 26, 2016, EPA took 
steps to develop this backstop role with respect to eastern states \3\ 
by finalizing an update to the 2011 Cross-State Air Pollution Rule 
(2011 CSAPR) ozone-season program that addresses good neighbor 
obligations for the 2008 8-hour ozone NAAQS (CSAPR Update).\4\ The 
CSAPR Update established statewide nitrogen oxides (NOX) 
budgets for certain affected electricity generating units (EGUs) in 22 
eastern states for the May through September ozone season to reduce the 
interstate transport of ozone pollution in the eastern United States, 
and, thereby, help downwind states and communities meet and maintain 
the 2008 8-hour ozone NAAQS. See 81 FR 74506. The rule also determined 
that emissions from 14 states (including Connecticut) would not 
significantly contribute to nonattainment or interfere with maintenance 
of the 2008 ozone NAAQS in downwind states. Accordingly, EPA determined 
that it did not need to require further emission reductions from 
sources in those states to address the good neighbor provision as to 
the 2008 ozone NAAQS. Id.
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    \2\ The EPA issued a Notice of Data Availability on August 4, 
2015, requesting comment on the modeling platform and air quality 
modeling results that were used for the proposed Cross-State Air 
Pollution Rule (CSAPR) Update. See 80 FR 46271.
    \3\ For purposes of the CSAPR Update, ``eastern'' states refer 
to all contiguous states fully east of the Rocky Mountains (thus not 
including the mountain states of Montana, Wyoming, Colorado, or New 
Mexico).
    \4\ See Federal Implementation Plans: Interstate Transport of 
Fine Particulate Matter and Ozone and Correction of SIP Approvals, 
Final Rule (2011 CSAPR), 76 FR 48208 (August 8, 2011); Cross-State 
Air Pollution Rule Update for the 2008 Ozone NAAQS (CSAPR Update), 
81 FR 74504 (October 26, 2016).
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    A recent ruling by the United States Court of Appeals for the 
District of Columbia Circuit in Wisconsin v. EPA, 938 F.3d 303 (D.C. 
Cir. 2019) upheld certain aspects of the CSAPR Update and remanded 
others to EPA but did not vacate the rule. Our proposed approval of 
Connecticut's Transport SIP relies in part on EPA's finding in the 
CSAPR Update that emissions from Connecticut do not significantly 
contribute to nonattainment or interfere with maintenance of the 2008 
ozone NAAQS in any downwind state. See 84 FR at 40346-47 (citing 81 FR 
at 74506). No party challenged that aspect of the CSAPR Update and 
nothing in the court's opinion overturned that finding or called it 
into doubt. Consequently, Wisconsin does not impact EPA's reliance on 
the finding in the CSAPR Update to support approval of Connecticut's 
Transport SIP for the 2008 ozone NAAQS.
    The CSAPR Update used the same framework that was used by EPA in 
developing 2011 CSAPR.\5\ Through several previous rulemakings,\6\ EPA, 
working in partnership with states, established a four-step interstate-
transport framework to address the requirements of the ``good 
neighbor'' provision for the ozone NAAQS.\7\ The four steps are: Step 
1--identify downwind receptors that are expected to have problems 
attaining or maintaining the NAAQS; step 2--determine which upwind 
states contribute enough to these identified downwind air quality 
problems to warrant further review and analysis; step 3--identify the 
emissions reductions necessary to prevent an identified upwind state 
from contributing significantly to those downwind air quality problems; 
and step 4--adopt permanent and enforceable measures needed to achieve 
those emissions reductions.
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    \5\ Key elements of the four-step interstate transport framework 
have been upheld by the Supreme Court in EPA v. EME Homer City 
Generation, L.P., 572 U.S. 489 (2014).
    \6\ NOX SIP Call. 63 FR 57356 (October 27, 1998); 
Clean Air Interstate Rule (CAIR). 70 FR 25162 (May 12, 2005); Cross-
State Air Pollution Rule (CSAPR). 75 FR 48208 (August 8, 2011); and 
CSAPR Update. 81 FR 74504 (October 26, 2016).
    \7\ The four-step interstate framework has also been used to 
address requirements of the good neighbor provision for some 
previous particulate matter (PM) NAAQS.
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    To apply the first and second steps of the four-step interstate-
transport framework to the 2008 ozone NAAQS, EPA evaluated modeling 
projections for air-quality monitoring sites in 2017 and considered 
current (at the time) ozone monitoring data at these sites to identify 
receptors \8\ anticipated to have problems attaining or maintaining the 
2008 ozone NAAQS. Next, EPA used air-quality modeling to assess 
contributions from upwind states to these downwind receptors and 
evaluated the contributions relative to a screening threshold of one 
percent (1%) of the 2008 NAAQS (i.e., 0.75 parts per billion (ppb)). 
States with contributions that equaled or exceeded the 1% threshold 
were identified as warranting further analysis for ``significant 
contribution to nonattainment'' or ``interference with maintenance'' of 
the NAAQS. In the CSAPR Update, EPA found that Connecticut did not 
contribute at or above the 1% threshold to any downwind nonattainment 
or maintenance receptor. See 81 FR 74506. Therefore, EPA did not issue 
FIP requirements for sources in Connecticut

[[Page 70915]]

as part of CSAPR Update. See id. at 74553.
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    \8\ Within the CSAPR framework, the term ``receptor'' indicates 
a monitoring site. Under CSAPR Update, nonattainment receptors are 
downwind monitoring sites that are projected to have an average 
design value that exceed the NAAQS and that have a current monitored 
design value above the NAAQS, while maintenance receptors are 
downwind monitoring sites that are projected to have maximum design 
values that exceed the NAAQS.
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II. EPA's Evaluation of Connecticut's Submittal

    On December 28, 2012, CT DEEP submitted most of its infrastructure 
SIP for the 2008 ozone NAAQS to EPA. On June 3, 2016, EPA fully 
approved most, and conditionally approved some portions, of that 
submittal. See 81 FR 35636. However, that submittal did not include the 
``good neighbor'' provisions of section 110(a)(2)(D)(i)(I). On June 15, 
2015, Connecticut submitted a SIP revision to address this unmet SIP 
obligation for the 2008 ozone NAAQS. In today's action, we are 
proposing to approve that submittal.
    In its June 2015 submittal, Connecticut examined the results of 
EPA's transport modeling for 2017 and ambient monitoring data at key 
downwind sites to demonstrate that the state meets its good neighbor 
requirements for the 2008 ozone NAAQS. CT DEEP referenced modeling 
results for EPA's 2011 CSAPR, which showed that emissions from 
Connecticut were projected to have a maximum impact in 2018 of 0.41 ppb 
at the monitor in Suffolk County, NY, with impacts at all other 
monitors of concern being 0.08 ppb or less, well below the 1% screening 
threshold of 0.75 ppb for the 2008 NAAQS.
    EPA's August 2016 CSAPR Update Modeling TSD also projected the 
largest contributions of emissions from Connecticut to nonattainment 
and maintenance receptors at well below the threshold of 1% of the 
NAAQS. Specifically, this modeling indicated that Connecticut's largest 
impact on any projected downwind nonattainment receptor in 2017 was 
0.00 ppb and the largest impact on any projected downwind maintenance-
only site was 0.46 ppb.\9\ As a result, in the CSAPR Update, EPA 
``determined that emissions from [Connecticut] do not significantly 
contribute to nonattainment or interfere with maintenance of the 2008 
ozone NAAQS in downwind states'' and that EPA ``need not require 
further emission reductions from sources in [Connecticut] to address 
the good neighbor provision as to the 2008 ozone NAAQS.'' 81 FR at 
74506.
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    \9\ See CSAPR Update Modeling TSD at Table 4-2.
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    Connecticut examined the results of EPA's transport modeling for 
2017 and CT DEEP projected state-emissions trends to demonstrate that 
the state meets its good-neighbor requirements for the 2008 ozone 
NAAQS. Based on their analysis, total NOX emissions are 
projected to decline 18% between 2017 and 2025. CT DEEP also expects 
additional NOX emission reductions in the post-2017 period 
because their analysis did not include the state's recent revisions to 
its low emission vehicle (LEV) regulations, EPA's Tier 3 vehicle and 
fuel standards, and updates to its NOX RACT regulations. 
These additional NOX reductions expected to occur in future 
years (described below) further help to ensure that the state will not 
significantly contribute to nonattainment or interfere with maintenance 
of the 2008 ozone NAAQS in other states.
    CT DEEP identified regulations that have been approved into the 
Connecticut SIP to provide for the control of nitrogen oxides 
(NOX) and volatile organic compounds (VOCs), the primary 
precursors to the formation of ground level ozone. Reasonably available 
control technology (RACT) has been required for major sources of 
NOX in Connecticut since 1996, with multiple updates since. 
On July 31, 2017, EPA approved Connecticut's Regulations of State 
Agencies (RCSA) sections 22a-174-22e, Control of nitrogen oxides 
emissions, -22f, High daily NOX emitting units at non-major 
sources of NOX, and -38, Municipal Waste Combustors. See 82 
FR 35454.
    In addition to these programs, CT DEEP noted that it implements 
regulations modeled after California's LEV program, has established a 
stringent new motor vehicle control program, and implements a statewide 
vehicle emission inspection and maintenance program and state and 
federal incentive programs for diesel vehicle retrofits and 
replacements. Connecticut also implements a variety of energy 
efficiency strategies, including its Comprehensive Energy Strategy20.
    In light of the EPA's determination made in the CSAPR Update 
finding that emissions from Connecticut will not significantly 
contribute to nonattainment or interfere with maintenance of the 2008 
ozone NAAQS in downwind states, we propose that Connecticut has met its 
CAA Section 110(a)(2)(D)(i)(I) ``good neighbor'' SIP obligation for the 
2008 ozone NAAQS.

III. Proposed Action

    EPA is proposing to approve Connecticut's June 15, 2015, SIP 
submission as meeting the CAA requirements of prongs 1 and 2 under 
section 110(a)(2)(D)(i)(I) for the 2008 8-hour ozone NAAQS. EPA is 
soliciting public comments on the issues discussed in this notice or on 
other relevant matters.\10\ These comments will be considered before 
taking final action. Interested parties may participate in the Federal 
rulemaking procedure by submitting written comments to this proposed 
rule by following the instructions listed in the ADDRESSES section of 
this Federal Register.
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    \10\ However, the EPA notes that it is not, in this action, 
reopening for public comment or otherwise reconsidering the analytic 
analysis conducted for or the determinations made in the final CSAPR 
Update rulemaking action.
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IV. Statutory and Executive Order Reviews

    Under the Clean Air Act, the Administrator is required to approve a 
SIP submission that complies with the provisions of the Act and 
applicable Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). 
Thus, in reviewing SIP submissions, EPA's role is to approve state 
choices, provided that they meet the criteria of the Clean Air Act. 
Accordingly, this proposed action merely approves state law as meeting 
Federal requirements and does not impose additional requirements beyond 
those imposed by state law. For that reason, this proposed action:
     Is not a significant regulatory action subject to review 
by the Office of Management and Budget under Executive Orders 12866 (58 
FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21, 2011);
     Is not expected to be an Executive Order 13771 regulatory 
action because this action is not significant under Executive Order 
12866;
     Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Is certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);
     Does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);
     Does not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not an economically significant regulatory action based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Is not subject to requirements of Section 12(d) of the 
National Technology Transfer and Advancement

[[Page 70916]]

Act of 1995 (15 U.S.C. 272 note) because application of those 
requirements would be inconsistent with the Clean Air Act; and
     Does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    In addition, the SIP is not approved to apply on any Indian 
reservation land or in any other area where EPA or an Indian tribe has 
demonstrated that a tribe has jurisdiction. In those areas of Indian 
country, the rule does not have tribal implications and will not impose 
substantial direct costs on tribal governments or preempt tribal law as 
specified by Executive Order 13175 (65 FR 67249, November 9, 2000).

List of Subjects in 40 CFR Part 52

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

    Dated: December 18, 2019.
Dennis Deziel,
Regional Administrator, EPA Region 1.
[FR Doc. 2019-27765 Filed 12-23-19; 8:45 am]
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