Proposed Rule2025-12515

Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions Inventory for 2008 8-Hour Ozone NAAQS

Primary source

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Published
July 7, 2025

Issuing agencies

Environmental Protection Agency

Abstract

The Environmental Protection Agency (EPA) is proposing to approve State Implementation Plan (SIP) revisions submitted by the State of Connecticut. These SIP revisions relate to the 2008 8-Hour ozone National Ambient Air Quality Standards (NAAQS). The SIP revisions consist of the following: 2014 and 2017 calendar year periodic emissions inventories. This action is being taken under the Clean Air Act.

Full Text

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<title>Federal Register, Volume 90 Issue 127 (Monday, July 7, 2025)</title>
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[Federal Register Volume 90, Number 127 (Monday, July 7, 2025)]
[Proposed Rules]
[Pages 29821-29826]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-12515]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R01-OAR-2025-0240; FRL-12861-01-R1]


Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions 
Inventory for 2008 8-Hour Ozone NAAQS

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve State Implementation Plan (SIP) revisions submitted by the 
State of Connecticut. These SIP revisions relate to the 2008 8-Hour 
ozone National Ambient Air Quality Standards (NAAQS). The SIP revisions 
consist of the following: 2014 and 2017 calendar year periodic 
emissions inventories. This action is being taken under the Clean Air 
Act.

DATES: Written comments must be received on or before August 6, 2025.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R01-
OAR-2025-0240 at <a href="https://www.regulations.gov">https://www.regulations.gov</a>, or via email to 
<a href="/cdn-cgi/l/email-protection#1a767376767369346a7b6e687379715a7f6a7b347d756c"><span class="__cf_email__" data-cfemail="b1ddd8ddddd8c29fc1d0c5c3d8d2daf1d4c1d09fd6dec7">[email&#160;protected]</span></a>. For comments submitted at <a href="http://Regulations.gov">Regulations.gov</a>, 
follow the online instructions for submitting comments. Once submitted, 
comments cannot be edited or removed from <a href="http://Regulations.gov">Regulations.gov</a>. 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 <a href="https://www.epa.gov/dockets/commenting-epa-dockets">https://www.epa.gov/dockets/commenting-epa-dockets</a>. Publicly 
available docket materials are available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> 
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.

FOR FURTHER INFORMATION CONTACT: Patrick Lillis, Air and Radiation 
Division (Mail Code 5-MI), U.S. Environmental Protection Agency--Region 
1, 5 Post Office Square, Suite 100, Boston, Massachusetts 02109-3912; 
tel. (617) 918-1067, or by email at <a href="/cdn-cgi/l/email-protection#4d21242121243e633d2c393f242e260d283d2c632a223b"><span class="__cf_email__" data-cfemail="670b0e0b0b0e1449170613150e040c2702170649000811">[email&#160;protected]</span></a>.

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

Table of Contents

I. Background
    A. The 2008 Ozone NAAQS
    B. Statutory and Regulatory Emission Inventory Requirements
II. State's Submittal
III. EPA's Evaluation
    A. 2014 Periodic Emissions Inventory
    B. 2017 Periodic Emissions Inventory
IV. Proposed Action
V. Statutory and Executive Order Reviews

I. Background

    Ozone is a gas that is formed by the reaction of Volatile Organic 
Compounds (VOC) and Oxides of Nitrogen (NO<INF>X</INF>) in the 
atmosphere in the presence of sunlight. Therefore, an emission 
inventory for ozone focuses on the emissions of VOC and NO<INF>X</INF>, 
referred to as ozone precursors. These precursors (VOC and 
NO<INF>X</INF>) are emitted by many types of pollution sources, 
including point sources such as power plants and industrial emissions 
sources; on-road and off-road mobile sources (motor vehicles and 
engines); and smaller residential and commercial sources, such as dry 
cleaners, auto body shops, and household paints, collectively referred 
to as nonpoint sources (also called area sources).
    An emission inventory of ozone is an estimation of actual emissions 
of air pollutants that contribute to the formation of ozone in an area. 
The emissions inventory provides emissions data for a variety of air 
quality planning tasks, including establishing baseline emission levels 
for calculating emission reduction targets needed to attain the NAAQS, 
determining emission inputs for ozone air quality modeling analyses, 
and tracking emissions over time to determine progress toward meeting 
Reasonable Further Progress (RFP) requirements.

A. The 2008 Ozone NAAQS

    On March 12, 2008, the EPA revised both the primary and secondary

[[Page 29822]]

NAAQS \1\ for ozone to a level of 0.075 parts per million (ppm) to 
provide increased protection of public health and the environment. (See 
73 FR 16436, March 27, 2008). The 2008 ozone NAAQS retains the same 
general form and averaging time as the 0.08 ppm NAAQS set in 1997 but 
is set at a more protective level. Under the EPA's regulations, the 
2008 8-hour ozone NAAQS is attained when the 3-year average of the 
annual fourth highest daily maximum 8-hour average ambient air quality 
ozone concentrations is less than or equal to 0.075 ppm.\2\
---------------------------------------------------------------------------

    \1\ The primary ozone standards provide protection for children, 
older adults, and people with asthma or other lung diseases, and 
other at-risk populations against an array of adverse health effects 
that include reduced lung function, increased respiratory symptoms 
and pulmonary inflammation; effects that contribute to emergency 
department visits or hospital admissions; and mortality. The 
secondary ozone standards protect against adverse effects to the 
public welfare, including those related to impacts on sensitive 
vegetation and forested ecosystems.
    \2\ For a detailed explanation of the calculation of the 3-year 
8-hour average, see 40 CFR part 50, appendix P.
---------------------------------------------------------------------------

    Effective July 20, 2012, the EPA designated as nonattainment any 
area that was violating the 2008 8-hour ozone NAAQS based on the three 
most recent years (2008-2010) of air monitoring data.\3\ With that 
rulemaking, the Greater Connecticut and the Connecticut portion of the 
New York-Northern New Jersey-Long Island, NY-NJ-CT areas were 
designated as marginal ozone nonattainment areas. Areas that were 
designated as marginal nonattainment were required to attain the 2008 
8-hour ozone NAAQS no later than July 20, 2015, based on 2012-2014 
monitoring data. Any state in which a marginal nonattainment area is 
located is required to submit certain SIP elements to the EPA in 
accordance with section 182(a) of the CAA.
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    \3\ See 77 FR 30088, May 21, 2012.
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B. Statutory and Regulatory Emission Inventory Requirements

    CAA sections 182(a)(1) and 182(a)(3)(A) require submission of base 
year and periodic emissions inventories, respectively, for each ozone 
nonattainment area.\4\ States are required to submit a periodic 
inventory of emissions sources in the nonattainment areas to meet the 
requirements of CAA Sec.  182(a)(3)(A), as specified in the Air 
Emissions Reporting Requirements (AERR) at 40 CFR part 51, subpart A. 
Each periodic inventory shall be submitted no later than the end of 
each 3-year period after the required submission of the base year 
inventory for the nonattainment area and this requirement shall apply 
until the area is redesignated to attainment.\5\ The emissions value 
included in the inventories shall be actual ozone season day emissions 
as defined by Sec.  51.1100(cc).\6\ These requirements allow the EPA, 
based on the states' progress in reducing emissions, to reassess its 
policies and air quality standards periodically and revise them as 
necessary. Most important, these inventories will be used to develop 
and assess new control strategies that states may use in attainment 
demonstration SIPs for ozone or other pollutants. The inventory may 
also serve as part of statewide inventories for purposes of regional 
modeling in transport areas, where the inventory plays an important 
role in modeling demonstrations for areas classified as nonattainment 
and outside transport regions.
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    \4\ ``For each nonattainment area, the state shall submit a base 
year inventory as defined by Sec.  51.1100(bb) to meet the emissions 
inventory requirement of CAA section 182(a)(1). This inventory shall 
be submitted no later than 24 months after the effective date of 
designation. The inventory year shall be selected consistent with 
the baseline year for the RFP plan as required by Sec.  
51.1110(b).'' (40 CFR 51.115(a)).
    \5\ CAA Sec.  182(a)(3)(A); 40 CFR 51.1115(b).
    \6\ 40 CFR 51.1115(c); see also Implementation of the 2008 
National Ambient Air Quality Standards for Ozone: State 
Implementation Plan Requirements, 80 FR 12264 (March 6, 2015).
---------------------------------------------------------------------------

II. State's Submittal

    CAA Sections 182(a)(3) and 172(c)(3) require the periodic 
submission of emissions inventories for the SIP planning process to 
address SIP requirements applicable to ozone nonattainment areas in 
each classification category. The Greater Connecticut and the 
Connecticut portion of the New York-Northern New Jersey-Long Island, 
NY-NJ-CT areas were both originally designated marginal nonattainment 
for the 2008 ozone NAAQS; initiating a two-year deadline to submit a 
base year emissions inventory, followed by a periodic emissions 
inventory every 3-years until the nonattainment areas attain the 
standard.\7\ EPA approved Connecticut's Department of Energy and 
Environmental Protection (CT DEEP) base year emissions inventory 
revisions SIP for the 2008 ozone NAAQS on October 1, 2018.\8\
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    \7\ See 77 FR 30088, May 21, 2012.
    \8\ See 83 FR 49297, October 1, 2018.
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    On May 3, 2024, CT DEEP submitted SIP revisions that included the 
2014 and 2017 periodic emissions inventories for the Greater 
Connecticut and the Connecticut portion of the New York-Northern New 
Jersey-Long Island, NY-NJ-CT ozone nonattainment areas. CT DEEP 
submitted the inventory to meet the CAA section 182(a)(3)(A) obligation 
to develop a periodic emission inventory every 3-years after the base 
year inventory until the nonattainment areas are designated as 
attainment for the NAAQS. The State conducted a public comment period 
with a public hearing, and the State did not receive any comment during 
the comment period or the hearing.
    Both the 2014 and 2017 periodic emissions inventories include 
annual and ozone season daily emissions for ozone precursors 
(NO<INF>X</INF>, VOC, and CO) from all source categories (point, 
nonpoint, on-road and nonroad mobile sources, and biogenic emissions) 
in both the Greater Connecticut and the Connecticut portion of the New 
York-Northern New Jersey-Long Island, NY-NJ-CT nonattainment areas.

III. EPA's Evaluation

A. 2014 Periodic Emissions Inventory

    EPA has reviewed Connecticut's 2014 periodic emissions inventory 
for consistency with the CAA and regulatory periodic emissions 
inventory requirements. Forty CFR 51.1115(b) provides that for each 
nonattainment area, the state shall submit a periodic emission 
inventory of emissions sources in the area to meet the requirement in 
CAA section 182(a)(3)(A). Connecticut meets this requirement through CT 
DEEP's submittal of a 2014 periodic emission inventory on May 3, 2024, 
that included both nonattainment areas that are violating the 2008 
ozone NAAQS.\9\ A copy of CT DEEP's 2014 periodic emission inventory is 
located in the docket of this proposed rulemaking. Forty CFR 51.1115(c) 
states that the emissions values included in periodic inventories shall 
be actual ozone season day emissions as defined by Sec.  51.1100(cc). 
Connecticut's submittal includes actual ozone season day emissions for 
ozone precursors in both nonattainment areas.\10\ EPA's AERR outlines 
emissions thresholds for point sources that states must report in their 
periodic emission inventories.\11\ CT DEEP's submittal includes point 
source emissions that meet or exceed the emission thresholds as defined 
in the AERR.\12\ Furthermore, CT DEEP satisfies any additional 
requirements of the AERR as defined in 40 CFR 51.1115(e) and in EPA 
2017 emissions inventory

[[Page 29823]]

guidance \13\ within their 2014 periodic emissions inventory 
submittal.\14\
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    \9\ See State of Connecticut State SIP Revision Cover Letter.
    \10\ See CT DEEP's 2014 Emission Inventory Submittal, 1-13--1-
15.
    \11\ See 40 CFR part 51, subpart A, appendix A.
    \12\ See CT DEEP's 2014 Emission Inventory Submittal, Section 2.
    \13\ See Emissions Inventory Guidance for Implementation of 
Ozone and Particulate Matter National Ambient Air Quality Standards 
(NAAQS) and Regional Haze Regulations, May 2017, Section 3.5.1 
(hereinafter, ``EPA Emissions Inventory Guidance'').
    \14\ See CT DEEP's 2014 Emission Inventory Submittal.
---------------------------------------------------------------------------

    EPA also reviewed the techniques used by CT DEEP to derive and 
quality assure the emission estimates used in preparing the 2014 
periodic emission inventory. EPA found that CT DEEP followed EPA's 2017 
Emissions Inventory guidance \15\ when developing their statewide 2014 
periodic emission inventory. Connecticut documented the procedures used 
to estimate the emissions for each of the major inventory source types 
as well as CT DEEP's Quality assurance (QA) and Quality Control (QC) 
checks to ensure 2014 emissions data are accurate.\16\ The 
documentation of the emission estimation procedures was adequate for 
EPA to determine that Connecticut followed acceptable procedures to 
estimate emissions. Specifically, QA/QC checks were performed relative 
to data collection and analysis and to double counting of emissions 
from point, area, and mobile sources. CT DEEP performed QA/QC to ensure 
accuracy of units, unit conversions, transposition of figures, and 
calculations. For more information on CT DEEP's QA/QC procedures while 
developing their 2014 emissions inventory, a copy of their submittal is 
located in the docket of this proposed rulemaking.\17\
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    \15\ See EPA Emissions Inventory Guidance, Section 3.5.
    \16\ See CT DEEP's 2014 Emission Inventory Submittal, Sections 
2.4, 2.4.3, and 6
    \17\ See id.
---------------------------------------------------------------------------

    Connecticut's 2014 periodic emissions inventory includes annual and 
ozone season daily emissions for ozone precursors (NO<INF>X</INF>, VOC, 
and CO) from all source categories (point, nonpoint, on-road and non-
road mobile sources, and biogenic emissions) in both the Greater 
Connecticut and the Connecticut portion of the New York-Northern New 
Jersey-Long Island, NY-NJ-CT nonattainment areas. These emission 
estimates are outlined in tables 1-4 below.

     Table 1--2014 Annual Emissions (TPY) of Ozone Precursor Compounds in the Greater Connecticut Ozone Non-
                                                 Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             400           2,628           1,096
On-Road Mobile Sources..........................................           8,662          14,903          89,134
Non-Road Mobile Sources.........................................           4,821           5,625          50,958
Area Sources....................................................          23,843           5,861          26,252
Biogenic Sources................................................          39,519             402           4,584
                                                                 -----------------------------------------------
    Total of All Sources........................................          77,245          29,418         172,025
----------------------------------------------------------------------------------------------------------------


Table 2--2014 Summer Day Emissions (Tons/Day) of Ozone Precursor Compounds in the Greater Connecticut Ozone Non-
                                                 Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................            14.2            21.4             4.7
On-Road Mobile Sources..........................................            24.4            41.4           276.0
Non-Road Mobile Sources.........................................            29.5            32.1           368.8
Area Sources....................................................            67.6             7.1            13.1
Biogenic Sources................................................           286.9             1.7            28.3
                                                                 -----------------------------------------------
    Total of All Sources........................................           409.7           103.7           691.0
----------------------------------------------------------------------------------------------------------------


  Table 3--2014 Annual Emissions (TPY) of Ozone Precursor Compounds in the Connecticut Portion of the New York-
                       Northern New Jersey-Long Island, NY-NJ-CT Ozone Non-Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             560           3,471             770
On-Road Mobile Sources..........................................           9,709          16,784         100,642
Non-Road Mobile Sources.........................................           5,703           7,215          72,076
Area Sources....................................................          24,369           6,880          17,838
Biogenic Sources................................................          21,127             175           2,319
                                                                 -----------------------------------------------
    Total of All Sources........................................          61,468          34,525         193,645
----------------------------------------------------------------------------------------------------------------


Table 4--2014 Summer Day Emissions (Tons/Day) of Ozone Precursor Compounds in the Connecticut Portion of the New
                    York-Northern New Jersey-Long Island, NY-NJ-CT Ozone Non-Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             2.0            17.1             4.4
On-Road Mobile Sources..........................................            27.2            46.1           313.0
Non-Road Mobile Sources.........................................            34.7            41.6           546.5
Area Sources....................................................            72.7             8.5            14.6

[[Page 29824]]

 
Biogenic Sources................................................           156.2             0.8            14.3
                                                                 -----------------------------------------------
    Total of All Sources........................................           292.8           114.0           892.8
----------------------------------------------------------------------------------------------------------------

B. 2017 Periodic Emissions Inventory

    EPA has reviewed Connecticut's 2017 periodic emissions inventory 
for consistency with the CAA and regulatory periodic emissions 
inventory requirements. Forty CFR 51.1115(b) provides that for each 
nonattainment area, the state shall submit a periodic emission 
inventory of emissions sources in the area to meet the requirement in 
CAA section 182(a)(3)(A). Connecticut meets this requirement through CT 
DEEP's submittal of a 2017 periodic emission inventory on May 3, 2024, 
that included both the Greater Connecticut and the Connecticut portion 
of the New York-Northern New Jersey-Long Island, NY-NJ-CT nonattainment 
areas.\18\ A copy of CT DEEP's 2017 periodic emission inventory is 
located in the docket of this proposed rulemaking. Forty CFR 51.1115(c) 
states that the emissions values included in periodic inventories shall 
be actual ozone season day emissions as defined by Sec.  51.1100(cc). 
Connecticut's submittal includes actual ozone season day emissions for 
ozone precursors in both nonattainment areas.\19\ EPA's AERR outlines 
emissions thresholds for point sources that states must report in their 
periodic emission inventories.\20\ CT DEEP's submittal includes point 
source emissions that meet or exceed the emission thresholds in the 
AERR.\21\ Furthermore, CT DEEP satisfies any additional requirements of 
the AERR as defined in 40 CFR 51.1115(e) and in EPA 2017 emissions 
inventory guidance \22\ within their 2017 periodic emissions inventory 
submittal.
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    \18\ See State of Connecticut State SIP Revision Cover Letter.
    \19\ See CT DEEP's 2017 Emission Inventory Submittal, 1-13--1-
15.
    \20\ See 40 CFR part 51, subpart A, appendix A.
    \21\ See CT DEEP's 2017 Emission Inventory Submittal, Section 2.
    \22\ See EPA Emissions Inventory Guidance, Section 3.5.1.
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    EPA also reviewed the techniques used by CT DEEP to derive and 
quality assure the emission estimates used in preparing the 2017 
periodic emission inventory. EPA found that CT DEEP followed EPA's 2017 
Emissions Inventory guidance \23\ when developing their statewide 2017 
periodic emission inventory. Connecticut documented the procedures used 
to estimate the emissions for each of the major inventory source types 
as well as CT DEEP's Quality assurance (QA) and Quality Control (QC) 
checks to ensure 2017 emissions data are accurate.\24\ The 
documentation of the emission estimation procedures was adequate for 
EPA to determine that Connecticut followed acceptable procedures to 
estimate emissions. Specifically, QA/QC checks were performed relative 
to data collection and analysis and to double counting of emissions 
from point, area, and mobile sources. CT DEEP performed QA/QC to ensure 
accuracy of units, unit conversions, transposition of figures, and 
calculations. For more information on CT DEEP's QA/QC procedures while 
developing their 2017 emissions inventory, a copy of their submittal is 
located in the docket of this proposed rulemaking.\25\
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    \23\ See id. Section 3.5.
    \24\ See CT DEEP's 2017 Emission Inventory Submittal, Section 
2.4, 2.4.3, and 6.
    \25\ See id.
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    Connecticut's 2017 periodic emissions inventory includes annual and 
ozone season daily emissions for ozone precursors (NO<INF>X</INF>, VOC, 
and CO) from all source categories (point, nonpoint, on-road and non-
road mobile sources, and biogenic emissions) in both the Greater 
Connecticut and the Connecticut portion of the New York-Northern New 
Jersey-Long Island, NY-NJ-CT nonattainment areas. These emission 
estimates are outlined in tables 5-8 below.

     Table 5--2017 Annual Emissions (TPY) of Ozone Precursor Compounds in the Greater Connecticut Ozone Non-
                                                 Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             382           2,197             938
On-Road Mobile Sources..........................................           6,434           8,115          70,956
Non-Road Mobile Sources.........................................           3,959           4,783          48,073
Area Sources....................................................          17,444           5,095          19,698
Biogenic Sources................................................          43,387             404           4,393
                                                                 -----------------------------------------------
    Total of All Sources........................................          71,605          20,594         144,058
----------------------------------------------------------------------------------------------------------------


Table 6--2017 Summer Day Emissions (Tons/Day) of Ozone Precursor Compounds in the Greater Connecticut Ozone Non-
                                                 Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             1.1            10.2             3.9
On-Road Mobile Sources..........................................            18.1            22.2           223.9
Non-Road Mobile Sources.........................................            13.5            15.4           177.6
Area Sources....................................................            53.0             6.0            10.9

[[Page 29825]]

 
Biogenic Sources................................................           308.8             1.7            25.9
                                                                 -----------------------------------------------
    Total of All Sources........................................           394.5            55.6           442.2
----------------------------------------------------------------------------------------------------------------


  Table 7--2017 Annual Emissions (TPY) of Ozone Precursor Compounds in the Connecticut Portion of the New York-
                       Northern New Jersey-Long Island, NY-NJ-CT Ozone Non-Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             542           2,418             570
On-Road Mobile Sources..........................................           7,162           9,405          80,407
Non-Road Mobile Sources.........................................           4,789           5,767          68,371
Area Sources....................................................          17,049           5,856          15,534
Biogenic Sources................................................          23,573             181           2,393
                                                                 -----------------------------------------------
    Total of All Sources........................................          53,115          23,627         167,274
----------------------------------------------------------------------------------------------------------------


Table 8--2017 Summer Day Emissions (Tons/Day) of Ozone Precursor Compounds in the Connecticut Portion of the New
                    York-Northern New Jersey-Long Island, NY-NJ-CT Ozone Non-Attainment Area
----------------------------------------------------------------------------------------------------------------
                           Source type                                  VOC             NOX             CO
----------------------------------------------------------------------------------------------------------------
Stationary Point Sources........................................             3.6            14.0             4.7
On-Road Mobile Sources..........................................            20.0            25.5           256.0
Non-Road Mobile Sources.........................................            16.6            19.0           262.1
Area Sources....................................................            52.7             6.9            11.9
Biogenic Sources................................................           168.3             0.8            14.1
                                                                 -----------------------------------------------
    Total of All Sources........................................           261.3            66.2           548.8
----------------------------------------------------------------------------------------------------------------

IV. Proposed Action

    Based on the EPA's review, the 2014 and 2017 periodic year 
emissions inventories submitted by the state of Connecticut for each 
ozone nonattainment area include essential data elements, source 
categories, sample calculations, and report documentation in accordance 
with CAA sections 182(a)(3)(A) requirements and were developed in 
accordance with EPA guidance.\26\ Therefore, the EPA is proposing to 
approve both the 2014 and the 2017 periodic emissions inventories for 
the Greater Connecticut and the Connecticut portion of the New York-
Northern New Jersey-Long Island, NY-NJ-CT 2008 ozone nonattainment 
areas.
---------------------------------------------------------------------------

    \26\ See EPA Emissions Inventory Guidance.
---------------------------------------------------------------------------

V. 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 Clean Air Act 
and applicable Federal regulations. See 42 U.S.C. 7410(k); 40 CFR 
52.02(a). Thus, in reviewing SIP submissions, EPA's role is to approve 
state choices, provided that they meet the criteria of the 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:
    <bullet> 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);
    <bullet> Is not subject to Executive Order 14192 (90 FR 9065, 
February 6, 2025) because SIP actions are exempt from review under 
Executive Order 12866;
    <bullet> Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
    <bullet> 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.);
    <bullet> 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);
    <bullet> Does not have federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
    <bullet> Is not subject to Executive Order 13045 (62 FR 19885, 
April 23, 1997) because it approves a state program;
    <bullet> Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001); and
    <bullet> 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.
    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, Nitrogen 
dioxide, Ozone, Reporting and recordkeeping requirements, Volatile 
organic compounds.


[[Page 29826]]


    Dated: June 23, 2025.
Mark Sanborn,
Regional Administrator, EPA Region 1.
[FR Doc. 2025-12515 Filed 7-3-25; 8:45 am]
BILLING CODE 6560-50-P


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