[Federal Register Volume 84, Number 97 (Monday, May 20, 2019)]
[Proposed Rules]
[Pages 22787-22805]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-09928]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-HQ-OAR-2018-0170; FRL-9993-55-OAR]
RIN 2060-AU04


Response to Clean Air Act Section 126(b) Petition From New York

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of proposed action on petition.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to deny 
a Clean Air Act (CAA or Act) petition submitted by the state of New 
York on March 12, 2018. The petition requests that the EPA make a 
finding that emissions from a group of hundreds of identified sources 
in nine states (Illinois, Indiana, Kentucky, Maryland, Michigan, Ohio, 
Pennsylvania, Virginia and West Virginia) significantly contribute to 
nonattainment and interfere with maintenance of the 2008 and 2015 ozone 
national ambient air quality standards (NAAQS) in Chautauqua County and 
the New York

[[Page 22788]]

Metropolitan Area (NYMA) in violation of the good neighbor provision. 
The EPA proposes to deny the petition because New York has not met its 
statutory burden to demonstrate, and the EPA has not independently 
found, that the group of identified sources emits or would emit in 
violation of the good neighbor provision for the 2008 or 2015 ozone 
NAAQS in Chautauqua County and the NYMA.

DATES: 
    Comments. Comments must be received on or before July 15, 2019.
    Public hearing: The EPA will hold a public hearing on this proposal 
on June 11, 2019, in Washington DC. Please refer to ADDRESSES for 
additional information on the comment period and public hearing.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-HQ-
OAR-2018-0170, at http://www.regulations.gov. Follow the online 
instructions for submitting comments. Once submitted, comments cannot 
be edited or removed from Regulations.gov. The EPA may publish any 
comment received to its public docket. Do not submit electronically any 
information you consider to be Confidential Business Information (CBI) 
or other information whose disclosure is restricted by statute. 
Multimedia submissions (audio, video, etc.) must be accompanied by a 
written comment. The written comment is considered the official comment 
and should include discussion of all points you wish to make. The EPA 
will generally not consider comments or comment contents located 
outside of the primary submission (e.g., on the Web, Cloud, or other 
file sharing system). For additional submission methods, the full EPA 
public comment policy, information about CBI or multimedia submissions, 
and general guidance on making effective comments, please visit http://www2.epa.gov/dockets/commenting-epa-dockets. Certain other material, 
such as copyrighted material, will not be placed on the internet but 
may be viewed, with prior arrangement, at the EPA Docket Center. 
Publicly available docket materials are available either electronically 
in www.regulations.gov or in hard copy at the Air and Radiation Docket 
and Information Center, EPA/DC, EPA William Jefferson Clinton West 
Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC. The 
Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through 
Friday, excluding legal holidays. The telephone number for the Public 
Reading Room is (202) 566-1744 and the telephone number for the Air and 
Radiation Docket and Information Center is (202) 566-1742. For 
additional information about the EPA's public docket, visit the EPA 
Docket Center homepage at: http://www.epa.gov/epahome/dockets.htm.
    Public hearing: The June 11, 2019, public hearing will be held at 
the EPA, William Jefferson Clinton East Building, Room 1117A, 1201 
Constitution Avenue NW, Washington, DC 20004. The public hearing will 
convene at 9:00 a.m. and end at 6:00 p.m. Eastern Time (ET) or 1 hour 
after the last registered speaker has spoken. The EPA will make every 
effort to accommodate all individuals interested in providing oral 
testimony. A lunch break is scheduled from 12:00 p.m. until 1:00 p.m. 
Please note that this hearing will be held at a U.S. government 
facility. Individuals planning to attend the hearing should be prepared 
to show valid picture identification to the security staff to gain 
access to the meeting room. The REAL ID Act, passed by Congress in 
2005, established new requirements for entering federal facilities. 
These requirements took effect July 21, 2014. If your driver's license 
is issued by American Samoa, you must present an additional form of 
identification to enter the federal building where the public hearing 
will be held. Acceptable alternative forms of identification include: 
Federal employee badges, passports, enhanced driver's licenses and 
military identification cards. For additional information for the 
status of your state regarding REAL ID, go to http://www.dhs.gov/real-id-enforcement-brief. In addition, you will need to obtain a property 
pass for any personal belongings you bring with you. Upon leaving the 
building, you will be required to return this property pass to the 
security desk. No large signs will be allowed in the building, and 
demonstrations will not be allowed on federal property for security 
reasons.
    If you would like to present oral testimony at the hearing, please 
notify Ms. Pamela Long, U.S. Environmental Protection Agency, Office of 
Air Quality Planning and Standards, Air Quality Policy Division, (C504-
01), Research Triangle Park, NC 27711, telephone (919) 541-0641, fax 
number (919) 541-5509, email address long.pam@epa.gov, no later than 
4:00 p.m. ET on June 7, 2011. Ms. Long will arrange a general time slot 
for you to speak. The EPA will make every effort to follow the schedule 
as closely as possible on the day of the hearing.
    Oral testimony will be limited to 5 minutes for each commenter. The 
EPA encourages commenters to provide the EPA with a copy of their oral 
testimony electronically (via email) or in hard copy form. Commenters 
should notify Ms. Long if they need specific translation services for 
non-English speaking commenters.
    The hearing schedule, including the list of speakers, will be 
posted on the EPA's Web at site https://www.epa.gov/ozone-pollution/ozone-national-ambient-air-quality-standards-naaqs-section-126-petitions prior to the hearing. Verbatim transcripts of the hearing and 
written statements will be included in the docket for the action.
    The public hearing will provide interested parties the opportunity 
to present data, views or arguments concerning the EPA's proposed 
response to the petition from New York. The EPA may ask clarifying 
questions during the oral presentations but will not respond to the 
presentations at that time. Written statements and supporting 
information that are submitted during the comment period will be 
considered with the same weight as any oral comments and supporting 
information presented at the public hearing. Written comments must be 
postmarked by the last day of the comment period.

FOR FURTHER INFORMATION CONTACT: For additional information regarding 
this proposed action, please contact: Beth W. Palma, U.S. EPA, Office 
of Air Quality Planning and Standards, Air Quality Policy Division, 
Mail Code C539-04, Research Triangle Park, NC 27711, telephone (919) 
541-5432, email at palma.elizabeth@epa.gov. For information on the 
public hearing or to register to speak at the hearing, contact Ms. 
Pamela Long, U.S. Environmental Protection Agency, Office of Air 
Quality Planning and Standards, Air Quality Planning Division, Mail 
Code C504-01, Research Triangle Park, NC 27711, telephone (919) 541-
0641, fax number (919) 541-5509, email at long.pam@epa.gov (preferred 
method for registering).

SUPPLEMENTARY INFORMATION:  The information in this document is 
organized as follows:

I. General Information
II. Executive Summary of the EPA's Proposed Decision on the CAA 
Section 126(b) Petition From New York
III. Background and Legal Authority
    A. Ground-Level Ozone and the Interstate Transport of Ozone
    B. CAA Sections 110 and 126
    C. The EPA's Historical Approach To Addressing Interstate 
Transport of Ozone Under the Good Neighbor Provision
    D. The CAA Section 126(b) Petition From New York
IV. The EPA's Proposed Decision on the CAA Section 126(b) Petition 
From New York

[[Page 22789]]

    A. The EPA's Approach for Granting or Denying CAA Section 126(b) 
Petitions Regarding the 2008 and 2015 8-Hour Ozone NAAQS
    B. The EPA's Evaluation of Whether the Petition Is Sufficient To 
Support a CAA Section 126(b) Finding
V. Conclusion
VI. Judicial Review
VII. Statutory Authority

I. General Information

    Throughout this document wherever ``we,'' ``us,'' ``our'' or 
``Agency'' is used, we mean the United States (U.S.) EPA.

Where can I get a copy of this document and other related information?

    The EPA has established a docket for this action under Docket ID 
No. EPA-HQ-OAR-2018-0170 (available at http://www.regulations.gov). The 
EPA has made available information related to the proposed action and 
the public hearing at website: https://www.epa.gov/ozone-pollution/ozone-national-ambient-air-quality-standards-naaqs-section-126-petitions.

II. Executive Summary of the EPA's Proposed Decision on the CAA Section 
126(b) Petition From New York

    In March 2018, the state of New York submitted a petition 
requesting that the EPA make a finding pursuant to CAA section 126(b) 
that emissions from over 350 facilities in nine states significantly 
contribute to nonattainment and/or interfere with maintenance of the 
2008 and 2015 ozone NAAQS in violation of CAA section 
110(a)(2)(D)(i)(I), otherwise known as the good neighbor provision. For 
the reasons explained in this notice, the EPA is proposing to deny the 
petition because New York has not met its statutory burden to 
demonstrate that the group of sources identified in the petition emits 
or would emit in violation of the good neighbor provision for the 2008 
or 2015 ozone NAAQS in either Chautauqua County or the NYMA.
    The EPA is evaluating the petition consistent with the same four-
step interstate transport framework that the EPA has used in previous 
regulatory actions addressing regional ozone transport problems. The 
EPA is, therefore, using this framework to evaluate whether the 
petition meets the standard to demonstrate under CAA section 126(b) 
that the sources emit or would emit in violation of the good neighbor 
provision. The EPA's proposed denial rests on both the first and third 
steps of this framework. With respect to the 2008 and 2015 ozone NAAQS 
in Chautauqua County, the EPA is proposing to deny the petition at step 
1 of the framework (i.e., whether there will be a downwind air quality 
problem relative to the relevant NAAQS) based on the conclusion that 
the petition has not identified, and the EPA has not independently 
found, relevant air quality problems. With respect to the 2008 ozone 
NAAQS in the NYMA, the EPA is similarly proposing to deny the petition 
based on the conclusion that the petition has not identified, and the 
EPA has not independently found, relevant air quality problems. Thus, 
the EPA is proposing to find as to these areas and NAAQS that the 
petition has not met its burden at step 1 of the four-step interstate 
transport framework. Thus, the group of identified sources neither 
emits nor would emit pollution in violation of the good neighbor 
provision. With respect to the 2015 ozone NAAQS in the NYMA, the EPA 
has identified a relevant downwind air quality problem, and, thus, the 
EPA is not proposing a denial at step 1 as to this portion of the 
petition.
    The EPA is additionally proposing to deny the petition as to all 
areas and NAAQS at step 3 of the framework (i.e., whether, considering 
cost and air-quality factors, emissions from sources in the named 
state(s) will significantly contribute to nonattainment or interfere 
with maintenance of a NAAQS at a receptor in another state). The EPA is 
proposing to find that material elements in the petition's assessment 
of whether the sources may be further controlled through implementation 
of cost-effective controls are insufficient and, thus, New York has not 
met its step 3 burden to demonstrate that the named sources currently 
emit or would emit in violation of the good neighbor provision with 
respect to the relevant ozone NAAQS. As to the claims in the petition 
regarding Chautauqua County (for both NAAQS) and the NYMA (for the 2008 
ozone NAAQS), this provides an independent basis for denial in addition 
to the proposed denial under step 3. The EPA is taking comment on 
whether to also deny the petition because the petitioner has not 
provided justification for the proposition that identification of such 
a large, undifferentiated number of sources located in numerous upwind 
states constitutes a ``group of stationary sources'' within the context 
of CAA section 126(b).
    Section III of this notice provides background information 
regarding the EPA's approach to addressing the interstate transport of 
ozone under CAA sections 110(a)(2)(D)(i)(I) and 126(b) and provides a 
summary of the relevant issues raised in New York's CAA section 126(b) 
petition. Section IV of this notice details the EPA's proposed action 
to deny the petition, including an explanation of the EPA's approach 
for granting or denying CAA section 126(b) petitions regarding the 2008 
and 2015 8-hour ozone NAAQS and the EPA's evaluation of the sufficiency 
of New York's petition, identifying technical insufficiencies in the 
petition and explaining how the EPA's own analysis informs its 
evaluation of the claims in the petition.

III. Background and Legal Authority

A. Ground-Level Ozone and the Interstate Transport of Ozone

    On March 12, 2008, the EPA promulgated a revision to the ground-
level ozone NAAQS, lowering both the primary and secondary standards to 
75 parts per billion (ppb).\1\ On October 1, 2015, the EPA further 
revised the ground-level ozone NAAQS to 70 ppb.\2\
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    \1\ See National Ambient Air Quality Standards for Ozone, Final 
Rule, 73 FR 16436 (March 27, 2008).
    \2\ See National Ambient Air Quality Standards for Ozone, Final 
Rule, 80 FR 65292 (October 26, 2015).
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    In this proposal, consistent with previous rulemakings described in 
Section III.C.2, the EPA relies on analyses that reflect the regional 
nature of transported ground-level ozone pollution. Ground-level ozone 
is not emitted directly into the air but is a secondary air pollutant 
created by chemical reactions between nitrogen oxides (NOX), 
carbon monoxide (CO), methane (CH4), and non-methane 
volatile organic compounds (VOCs) in the presence of sunlight. 
Emissions from mobile sources, electric generating units (EGUs), 
industrial facilities, gasoline vapors, and chemical solvents are some 
of the major anthropogenic sources of ozone precursors. The potential 
for ground-level ozone formation increases during periods with warmer 
temperatures and stagnant air masses. Therefore, ozone levels are 
generally higher during the summer months.3 4 Ground-level 
ozone concentrations and temperature are highly correlated in the 
eastern U.S., with observed ozone increases of 2-3 ppb per degree 
Celsius reported.\5\
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    \3\ Rasmussen, D.J. et al. (2012). Surface ozone-temperature 
relationships in the eastern U.S.: A monthly climatology for 
evaluating chemistry-climate models. Atmospheric Environment 47: 
142-153.
    \4\ High ozone concentrations have also been observed in cold 
months, where a few areas in the western U.S. have experienced high 
levels of local VOC and NOX emissions that have formed 
ozone when snow is on the ground and temperatures are near or below 
freezing.
    \5\ Bloomer, B.J., J.W. Stehr, C.A. Piety, R.J. Salawitch, and 
R.R. Dickerson (2009). Observed relationships of ozone air pollution 
with temperature and emissions, Geophys. Res. Lett., 36, L09803.
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    Precursor emissions can be transported downwind directly or, after

[[Page 22790]]

transformation in the atmosphere, as ozone. Studies have established 
that ozone formation, atmospheric residence, and transport can occur on 
a regional scale (i.e., across hundreds of miles) over much of the 
eastern U.S. Thus, in any given location, ozone pollution levels are 
affected by a combination of local emissions and emissions from upwind 
sources. Numerous observational studies have demonstrated the transport 
of ozone and its precursors and the impact of upwind emissions on high 
concentrations of ozone pollution.\6\
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    \6\ For example, Bergin, M.S. et al. (2007). Regional air 
quality: Local and interstate impacts of NOX and 
SO2 emissions on ozone and fine particulate matter in the 
eastern United States. Environmental Sci & Tech. 41: 4677-4689.
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    The EPA concluded in several previous rulemakings (summarized in 
Section III.C.2) that interstate ozone transport can be an important 
component of peak ozone concentrations during the summer ozone season 
and that NOX control strategies are effective for reducing 
regional-scale ozone transport. Model assessments have looked at 
impacts on peak ozone concentrations after potential emissions 
reduction scenarios for NOX and VOCs for NOX-
limited and VOC-limited areas. For example, Jiang and Fast concluded 
that NOX emissions reduction strategies are effective in 
lowering ozone mixing ratios in urban areas and Liao et al. showed that 
NOX reductions result in lower peak ozone concentrations in 
non-attainment areas in the Mid-Atlantic.7 8
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    \7\ Jiang, G.; Fast, J.D. (2004). Modeling the effects of VOC 
and NOX emissions sources on ozone formation in Houston 
during the TexAQS 2000 field campaign. Atmospheric Environment 38: 
5071-5085.
    \8\ Liao, K. et al. (2014) Impacts of interstate transport of 
pollutants on high ozone events over the Mid-Atlantic United States. 
Atmospheric Environment 84: 100-112.
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    Studies have found that NOX emissions reductions can be 
effective in reducing ozone pollution as quantified by the form of the 
2008 ozone standard (8-hour peak concentrations). Specifically, studies 
have found that NOX emissions reductions from EGUs, mobile 
sources, and other source categories can be effective in reducing the 
upper-end of the cumulative ozone distribution in the summer on a 
regional scale.\9\ Analysis of air quality monitoring data trends shows 
reductions in summertime ozone concurrent with implementation of 
NOX reduction programs.\10\ Gilliland et al. examined the 
NOX State Implementation Plan (SIP) Call,\11\ discussed in 
more detail in Section III.C.2, and presented reductions in observed 
versus modeled ozone concentrations in the eastern U.S. downwind from 
major NOX sources.\12\ The results showed significant 
reductions in ozone concentrations (10-25 percent) from observed 
measurements (CASTNET and AQS) \13\ between 2002 and 2005, linking 
reductions in EGU NOX emissions from upwind states with 
ozone reductions downwind of the major source areas.\14\ Additionally, 
G[eacute]go et al. showed that ground-level ozone concentrations were 
significantly reduced after implementation of the NOX SIP 
Call.\15\ Thus, these studies support the EPA's continued focus on 
regional and seasonal NOX control strategies to address 
regional interstate ozone pollution transport.
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    \9\ Hidy, G.M. and Blanchard C.L. (2015). Precursor reductions 
and ground-level ozone in the Continental United States. J. of Air & 
Waste Management Ass'n 65, 10.
    \10\ Simon, H. et al. (2015). Ozone trends across the United 
States over a period of decreasing NOX and VOC emissions. 
Environmental Science & Technology 49, 186-195.
    \11\ See Finding of Significant Contribution and Rulemaking for 
Certain States in the Ozone Transport Assessment Group Region for 
Purposes of Reducing Regional Transport of Ozone (NOX SIP 
Call). 63 FR 57356 (October 27, 1998).
    \12\ Gilliland, A.B. et al. (2008). Dynamic evaluation of 
regional air quality models: Assessing changes in O3 
stemming from changes in emissions and meteorology. Atmospheric 
Environment 42: 5110-5123.
    \13\ CASTNET is the EPA's Clean Air Status and Trends Network. 
AQS is the EPA's Air Quality System.
    \14\ Hou, Strickland & Liao (2015). Contributions of regional 
air pollutant emissions to ozone and fine particulate matter-related 
mortalities in eastern U.S. urban areas. Environmental Research 137: 
475-484.
    \15\ G[eacute]go et al. (2007). Observation-based assessment of 
the impact of nitrogen oxides emission reductions on O3 
air quality over the eastern United States. J. of Applied 
Meteorology and Climatology 46: 994-1008.
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B. CAA Sections 110 and 126

    The statutory authority for this action is provided by CAA sections 
126 and 110(a)(2)(D)(i). Section 126(b) of the CAA provides, among 
other things, that any state or political subdivision may petition the 
Administrator of the EPA to find that any major source or group of 
stationary sources in an upwind state emits or would emit any air 
pollutant in violation of the prohibition of CAA section 
110(a)(2)(D)(i), referred to as the good neighbor provision of the 
Act.\16\ Petitions submitted pursuant to this section are commonly 
referred to as CAA section 126(b) petitions. Similarly, findings by the 
Administrator, pursuant to this section, that a source or group of 
sources emits air pollutants in violation of the CAA section 
110(a)(2)(D)(i) prohibition are commonly referred to as CAA section 
126(b) findings.
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    \16\ The text of CAA section 126 as codified in the U.S. Code 
cross-references section 110(a)(2)(D)(ii) instead of section 
110(a)(2)(D)(i). The courts have confirmed that this is a 
scrivener's error and the correct cross-reference is to CAA section 
110(a)(2)(D)(i). See Appalachian Power Co. v. EPA, 249 F.3d 1032, 
1040-44 (D.C. Cir. 2001).
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    CAA section 126(c) explains the effect of a CAA section 126(b) 
finding and establishes the conditions under which continued operation 
of a source subject to such a finding may be permitted. Specifically, 
CAA section 126(c) provides that it is a violation of section 126 of 
the Act and of the applicable SIP: (1) For any major proposed new or 
modified source subject to a CAA section 126(b) finding to be 
constructed or operate in violation of the prohibition of CAA section 
110(a)(2)(D)(i) or (2) for any major existing source for which such a 
finding has been made to stay in operation more than 3 months after the 
date of the finding. The statute, however, also gives the Administrator 
discretion to permit the continued operation of a source beyond 3 
months if the source complies with emissions limitations and compliance 
schedules provided by the EPA to bring about compliance with the 
requirements contained in CAA sections 110(a)(2)(D)(i) and 126 as 
expeditiously as practicable, but in any event no later than 3 years 
from the date of the finding.
    Section 110(a)(2)(D)(i) of the CAA requires states to prohibit 
certain emissions from in-state sources if such emissions impact the 
air quality in downwind states. Specifically, CAA sections 110(a)(1) 
and 110(a)(2)(D)(i)(I) require all states, within 3 years of 
promulgation of a new or revised NAAQS, to submit SIPs that contain 
adequate provisions prohibiting any source or other type of emissions 
activity within the state from emitting any air pollutant in amounts 
which will contribute significantly to nonattainment in, or interfere 
with maintenance by, any other state with respect to that NAAQS. As 
described further in Section III.C.2, the EPA has developed several 
regional rulemakings to address the requirements of CAA section 
110(a)(2)(D)(i)(I) for the various ozone NAAQS. The EPA's most recent 
rulemaking, Determination Regarding Good Neighbor Obligations for the 
2008 Ozone National Ambient Air Quality Standard (the Determination 
Rule), finalized a determination that the existing Cross-State Air 
Pollution Rule Update for the 2008 Ozone NAAQS (CSAPR Update) \17\ 
fully addresses

[[Page 22791]]

certain states' interstate transport obligations under CAA section 
110(a)(2)(D)(i)(I) for the 2008 ozone NAAQS. 83 FR 65878 (December 21, 
2018).
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    \17\ See Cross-State Air Pollution Rule Update for the 2008 
Ozone National Ambient Air Quality Standards, Final Rule, 81 FR 
74504 (October 26, 2016).
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    Section 110(a)(2)(D)(ii) of the CAA further requires SIPs to 
contain adequate provisions insuring compliance with the applicable 
requirements of, inter alia, CAA section 126. Thus, where the EPA has 
made a finding pursuant to CAA section 126(b), this provision requires 
states to revise their SIPs to adopt any emissions limitations and 
compliance schedules provided by the EPA under CAA section 126(c).

C. The EPA's Historical Approach To Addressing Interstate Transport of 
Ozone Under the Good Neighbor Provision

    Given that formation, atmospheric residence, and transport of ozone 
can occur on a regional scale (i.e., across hundreds of miles) and that 
many separate areas across the eastern U.S. have struggled to attain 
and maintain the NAAQS, the states and the EPA have historically 
addressed the interstate transport of ozone pursuant to the good 
neighbor provision by promulgating rulemakings that employ regional 
trading programs to reduce NOX emissions. Each of these 
rulemakings followed a similar four-step interstate transport framework 
to evaluate the extent of the ozone transport problem (i.e., the 
breadth of downwind ozone problems and the contributions from upwind 
states) and, ultimately, to find that downwind states' problems 
attaining and maintaining the ozone NAAQS result from an interconnected 
system of transported pollution emitted by multiple upwind sources 
located in different upwind states combined with downwind (i.e., 
locally generated) ozone.
1. Description of the Four-Step Interstate Transport Framework
    Through the development and implementation of several previous 
rulemakings,\18\ the EPA, working in partnership with states, 
established the following four-step interstate transport framework to 
address the requirements of the good neighbor provision for regional 
pollutants such as ozone and fine particulate matter 
(PM2.5):
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    \18\ See Finding of Significant Contribution and Rulemaking for 
Certain States in the Ozone Transport Assessment Group Region for 
Purposes of Reducing Regional Transport of Ozone (also known as the 
NOX SIP Call), 63 FR 57356 (October 27, 1998); Clean Air 
Interstate Rule (CAIR) Final Rule, 70 FR 25162 (May 12, 2005); CSAPR 
Final Rule, 76 FR 48208 (August 8, 2011); CSAPR Update Final Rule, 
81 FR 74504 (October 26, 2016); Determination Rule, 83 FR 65878 
(December 21, 2018).
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    (1) Identify downwind receptors that are expected to have problems 
attaining or maintaining the NAAQS. The EPA historically identified 
downwind areas with air quality problems, or receptors, using air 
quality modeling projections for a future analytic year and, where 
appropriate, considering monitored air quality data.
    (2) Determine which upwind states are linked to these identified 
downwind air quality problems and thus warrant further analysis to 
determine whether their emissions violate the good neighbor provision. 
In the EPA's most recent transport rulemakings for the 1997 and 2008 
ozone NAAQS, as well as the 1997 and 2006 PM2.5 NAAQS, the 
Agency identified such upwind states to be those modeled to contribute 
at or above a threshold relative to the applicable NAAQS.
    (3) For states linked to downwind air quality problems, identify 
upwind emissions (if any) on a statewide basis that will significantly 
contribute to nonattainment or interfere with maintenance of a standard 
at a receptor in another state. In the EPA's prior rulemakings for 
ozone and PM2.5, the Agency identified and apportioned 
emissions reduction responsibility among multiple upwind states linked 
to downwind air quality problems by identifying a uniform level of 
control stringency based on cost and air quality factors evaluated in a 
multi-factor test.
    (4) For upwind states that are found to have emissions that will 
significantly contribute to nonattainment or interfere with maintenance 
of the NAAQS downwind, implement the necessary emissions reductions 
within the state. When the EPA has promulgated federal implementation 
plans (FIPs) addressing the good neighbor provision for ozone and 
PM2.5 NAAQS in prior transport rulemakings, the EPA has 
typically required affected sources in upwind states to participate in 
allowance trading programs to achieve the necessary emissions 
reductions.\19\ In addition, the EPA has also offered states the 
opportunity to participate in comparable EPA-operated allowance trading 
programs to achieve the necessary emissions reductions through SIPs.
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    \19\ While the EPA has chosen to implement emissions reductions 
through allowance trading programs for states found to have a 
downwind impact, upwind states can choose to submit a SIP that 
implements such reductions through other enforceable mechanisms that 
meet the requirements of the good neighbor provision, such as the 
enforceable mechanisms that the petitioner apparently favors and 
argues for in its petition.
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    Using the four-step framework to evaluate a particular interstate 
transport problem allows the EPA to determine whether upwind sources 
are actually linked to a downwind air quality problem, whether and 
which sources can be cost-effectively controlled to address that 
downwind air quality problem, what level of emissions should be 
eliminated to address the downwind air quality problem, and the means 
of implementing corresponding emissions limits (i.e., source-specific 
rates, or statewide emissions budgets in a limited regional allowance 
trading program). The outcome of this assessment varies based on the 
scope of the air quality problem, the availability and cost of controls 
at sources in upwind states, and the estimated impact of upwind 
emissions reductions on downwind ozone concentrations.
2. Prior Regional Rulemakings Under the Good Neighbor Provision
    The EPA's first regional interstate transport rulemaking, the 
NOX SIP Call, addressed the 1979 ozone NAAQS. 63 FR 57356 
(October 27, 1998).\20\ The NOX SIP Call was the result of 
the analytic work and recommendations of the Ozone Transport Assessment 
Group, which was organized and led by states in consultation with the 
EPA and other stakeholders. The EPA used this collaboratively-developed 
analysis to conclude in the NOX SIP Call that ``[t]he fact 
that virtually every nonattainment problem is caused by numerous 
sources over a wide geographic area is a factor suggesting that the 
solution to the problem is the implementation over a wide area of 
controls on many sources, each of which may have a small or 
unmeasurable ambient impact by itself.'' 63 FR 57356, 57377 (October 
27, 1998). The NOX SIP Call promulgated statewide emissions 
budgets and required upwind states to adopt SIPs that would decrease 
their NOX emissions to meet these budgets, thereby 
prohibiting the emissions that significantly contribute to 
nonattainment or interfere with maintenance of the ozone NAAQS in 
downwind states. The EPA also promulgated a model rule for a regional 
allowance trading program called the

[[Page 22792]]

NOX Budget Trading Program that states could adopt in their 
SIPs as a mechanism to achieve some or all required emissions 
reductions. All jurisdictions covered by the NOX SIP Call 
ultimately chose to adopt the NOX Budget Trading Program 
into their SIPs. The NOX SIP Call was ultimately upheld by 
the U.S. Court of Appeals for the District of Columbia Circuit (D.C. 
Circuit) in all pertinent respects. See Michigan v. EPA, 213 F.3d 663 
(2000).
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    \20\ As originally promulgated, the NOX SIP Call also 
addressed good neighbor obligations under the 1997 8-hour ozone 
NAAQS, but the EPA subsequently stayed the rule's provisions with 
respect to that standard. 40 CFR 51.121(q). The EPA recently 
finalized an action rescinding the 1997 ozone NAAQS as a basis for 
the NOX SIP Call. 84 FR 8422 (March 8, 2019).
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    In coordination with the NOX SIP Call rulemaking under 
CAA section 110(a)(2)(D)(i)(I), the EPA also addressed several pending 
CAA section 126(b) petitions submitted by eight northeastern states 
regarding the same air quality issues addressed by the NOX 
SIP Call, specifically interstate ozone transport for the 1979 ozone 
NAAQS. These CAA section 126(b) petitions asked the EPA to find that 
ozone emissions from numerous sources located in 30 states and the 
District of Columbia had adverse air quality impacts on the petitioning 
downwind states. Half of the petitioning states (i.e., Connecticut, 
Maine, New York, and Pennsylvania) requested an allowance trading 
program to reduce NOX emissions and remedy regional 
interstate ozone transport. 63 FR 56297 (October 21, 1998). Based on 
analysis conducted for the NOX SIP Call regarding upwind 
state impacts on downwind air quality, the EPA, in May 1999, made 
technical determinations regarding the claims in the petitions, but did 
not at that time make the CAA section 126(b) findings requested by the 
petitions. 64 FR 28250 (May 25, 1999). In making these technical 
determinations, the EPA concluded that the NOX SIP Call 
would fully address and remediate the claims raised in these petitions 
and that the EPA would, therefore, not need to take separate action to 
remedy any potential violations of the CAA section 110(a)(2)(D)(i) 
prohibition. 64 FR 28252. However, subsequent litigation over the 
NOX SIP Call led the EPA to ``de-link'' the CAA section 
126(b) petition response from the NOX SIP Call, and the EPA 
made final CAA section 126(b) findings for 12 states named in the 
petitions and the District of Columbia. The EPA found that sources in 
these states emitted in violation of the prohibition in the good 
neighbor provision with respect to the 1979 ozone NAAQS based on the 
affirmative technical determinations made in the May 1999 rulemaking. 
To remedy the violation under CAA section 126(c), the EPA required 
affected sources in the upwind states to participate in a regional 
allowance trading program whose requirements were designed to be 
interchangeable with the requirements of the optional NOX 
Budget Trading Program model rule provided under the NOX SIP 
Call. 65 FR 2674 (January 18, 2000). The EPA's action on these CAA 
section 126(b) petitions was upheld by the D.C. Circuit. See 
Appalachian Power Co. v. EPA, 249 F.3d 1032 (D.C. Cir. 2001).
    The EPA next promulgated the Clean Air Interstate Rule (CAIR), 70 
FR 25162 (May 12, 2005), to address interstate transport under the good 
neighbor provision with respect to the 1997 ozone NAAQS, as well as the 
1997 PM2.5 NAAQS. 70 FR 25172. The EPA adopted the same 
approach for quantifying the level of states' significant contribution 
to downwind nonattainment in CAIR as it used in the NOX SIP 
Call, based on the determination in the NOX SIP Call that 
downwind ozone nonattainment is due to the impact of emissions from 
numerous upwind sources and states. 70 FR 25162, 25172 (May 12, 2005). 
The EPA explained that ``[t]ypically, two or more States contribute 
transported pollution to a single downwind area, so that the 
`collective contribution' is much larger than the contribution of any 
single State.'' 70 FR 25186. CAIR included two distinct regulatory 
processes: (1) A rulemaking to define significant contribution (i.e., 
the emissions reduction obligation) under the good neighbor provision 
and provide for submission of SIPs eliminating that contribution, 70 FR 
25162 (May 12, 2005); and (2) a rulemaking to promulgate, where 
necessary, FIPs imposing emissions limitations in the event states did 
not submit SIPs. 71 FR 25328 (April 28, 2006). The FIPs required EGUs 
in affected states to participate in regional allowance trading 
programs, which replaced the previous NOX Budget Trading 
Program.
    In conjunction with the second CAIR rulemaking, which promulgated 
backstop FIPs, the EPA acted on a CAA section 126(b) petition received 
from the state of North Carolina on March 19, 2004, seeking a finding 
that large EGUs located in 13 states were significantly contributing to 
nonattainment and/or interfering with maintenance of the 1997 ozone 
NAAQS and the 1997 PM2.5 NAAQS in North Carolina. Citing the 
analyses conducted to support the promulgation of CAIR, the EPA denied 
North Carolina's CAA section 126(b) petition in full based on 
determinations either that the named states were not adversely 
impacting downwind air quality in violation of the good neighbor 
provision, or that such impacts were fully remedied by implementation 
of the emissions reductions required by the CAIR FIPs. 71 FR 25328, 
25330 (April 28, 2006).
    The D.C. Circuit found that the EPA's approach to CAA section 
110(a)(2)(D)(i)(I) in CAIR was ``fundamentally flawed'' in several 
respects, and the rule was remanded in July 2008 with the instruction 
that the EPA replace the rule ``from the ground up.'' North Carolina, 
531 F.3d at 929. The decision concluded the EPA's analysis and 
compliance mechanisms did not address all elements required by the 
statute. The EPA's separate action denying North Carolina's CAA section 
126(b) petition was not challenged.
    On August 8, 2011, the EPA promulgated CSAPR to replace CAIR. 76 FR 
48208 (August 8, 2011). CSAPR addressed the same (1997) ozone and 
PM2.5 NAAQS as CAIR and additionally addressed interstate 
transport for the 2006 PM2.5 NAAQS by requiring 28 states to 
reduce sulfur dioxide (SO2) emissions, annual NOX 
emissions, and/or ozone season NOX emissions that would 
significantly contribute to other states' nonattainment or interfere 
with other states' ability to maintain these air quality standards. 
Consistent with prior determinations made in the NOX SIP 
Call and CAIR, the EPA again found that multiple upwind states 
contributed to ozone nonattainment in multiple downwind states. 
Specifically, the EPA found ``that the total `collective contribution' 
from upwind sources represents a large portion of PM2.5 and 
ozone at downwind locations and that the total amount of transport is 
composed of the individual contribution from numerous upwind states.'' 
76 FR 48237. Accordingly, the EPA conducted a regional analysis, 
calculated emissions budgets for affected states, and required EGUs in 
these states to participate in new regional allowance trading programs 
to reduce statewide emissions levels.\21\ CSAPR was subject to nearly 4 
years of litigation. Ultimately, the Supreme Court upheld the EPA's 
approach to calculating emissions reduction obligations and 
apportioning upwind state responsibility under the good neighbor 
provision, but also held that the EPA was precluded from requiring more 
emissions reductions

[[Page 22793]]

than necessary to address downwind air quality problems, or ``over-
controlling'' upwind state emissions. See EPA v. EME Homer City 
Generation, L.P., 134 S. Ct. 1584, 1607-09 (2014) (EME Homer City).\22\
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    \21\ The CSAPR trading programs included assurance provisions to 
ensure that emissions are reduced within each individual state, in 
accordance with North Carolina, 531 F.3d at 907-08 (holding the EPA 
must require elimination of emissions from each upwind state that 
contribute significantly to nonattainment and interfere with 
maintenance in downwind areas). Those provisions were also included 
in the CSAPR Update and took effect with the 2017 CSAPR compliance 
periods.
    \22\ On remand from the Supreme Court, the D.C. Circuit further 
affirmed various aspects of the CSAPR, while remanding the rule 
without vacatur for reconsideration of certain states' emissions 
budgets where it found those budgets may over-control emissions 
beyond what was necessary to address the good neighbor requirements. 
EME Homer City Generation, L.P. v. EPA, 795 F.3d 118 (2015) (EME 
Homer City II). The EPA addressed the remand in several rulemaking 
actions in 2016 and 2017.
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    In 2016, the EPA promulgated the CSAPR Update to address the good 
neighbor provision requirements for the 2008 ozone NAAQS. 81 FR 74504 
(October 26, 2016). The CSAPR Update built upon previous regulatory 
efforts to address the collective contributions of ozone pollution from 
22 states in the eastern U.S. to widespread downwind air quality 
problems. As with previous rulemakings, the EPA evaluated the nature 
(i.e., breadth and interconnectedness) of the ozone problem and 
NOX reduction potential from EGUs, including essentially all 
the EGUs at the facilities named in the New York CAA section 126(b) 
petition.\23\ In the CSAPR Update, the EPA quantified emissions 
reduction obligations for each state based on an analysis of control 
strategies that could be implemented by the 2017 ozone season and 
implemented those emissions reductions through FIPs which required EGUs 
in affected states to participate in a regional allowance trading 
program to further reduce statewide NOX emissions levels.
---------------------------------------------------------------------------

    \23\ The EPA uses the language ``essentially all the EGUs at the 
facilities named . . .'' (emphasis added) to clarify that the New 
York petition identifies sources at the facility, rather than at the 
unit, level. The CSAPR Update looked at unit-level data and included 
all fossil-fuel-fired boiler or combustion turbine EGUs with a 
capacity (electrical output) greater than 25 megawatts (MW). See 81 
FR 74563 (October 26, 2016).
---------------------------------------------------------------------------

    At the time the EPA finalized the CSAPR Update in 2016, the EPA was 
unable to determine whether the rule fully resolved good neighbor 
obligations with respect to the 2008 ozone NAAQS for most (i.e., 21) of 
the states subject to that action, including those addressed in New 
York's petition (i.e., Illinois, Indiana, Kentucky, Maryland, Michigan, 
Ohio, Pennsylvania, Virginia and West Virginia). The EPA stated that, 
based on its analysis at that time, the emissions reductions required 
by the rule ``may not be all that is needed'' to address transported 
emissions.\24\ 81 FR 74521-22 (October 26, 2016). The information 
available at that time suggested that downwind air quality problems 
would remain in 2017 after implementation of the CSAPR Update and that 
upwind states continued to be linked to those downwind problems at or 
above the one-percent threshold. However, in the CSAPR Update, the EPA 
could not determine whether, in step 3 of the four-step interstate 
transport framework, the EPA had quantified all emissions reductions 
that may be considered cost-effective because the rule did not evaluate 
non-EGU ozone season NOX reductions and further EGU control 
strategies (i.e., the implementation of new post-combustion controls) 
that were achievable on timeframes extending beyond the 2017 analytic 
year.
---------------------------------------------------------------------------

    \24\ The EPA determined that the emissions reductions required 
by the CSAPR Update satisfied the full scope of the good neighbor 
obligation for Tennessee with respect to the 2008 ozone NAAQS. 81 FR 
74551-52 (October 26, 2016).
---------------------------------------------------------------------------

    On December 6, 2018, the EPA finalized a determination that, based 
on the latest available emissions inventory and air quality modeling 
data for a 2023 analytic year, the CSAPR Update fully addresses the 
good neighbor provision requirements for the 2008 ozone NAAQS for 20 
eastern states (among the 22) previously addressed in the CSAPR Update. 
83 FR 65878 (December 21, 2018). The EPA's Determination Rule applied 
the four-step interstate transport framework but did not move beyond an 
analysis at step 1 of the four-step framework, because the EPA found 
that there would be no remaining nonattainment or maintenance receptors 
for the 2008 ozone NAAQS in the eastern U.S. in 2023. Therefore, with 
the CSAPR Update fully implemented, the EPA finalized in the 
Determination Rule a finding that the 20 states addressed by that 
action (including eight of the nine states named in New York's 
petition) will not contribute significantly to nonattainment in, or 
interfere with maintenance by, any other state regarding the 2008 ozone 
NAAQS. The EPA had already determined that the remaining two states 
would have no remaining good neighbor obligation for the 2008 ozone 
NAAQS--one in the CSAPR Update (Tennessee), 81 FR 74540 (October 26, 
2016), and the other in a separate SIP approval (Kentucky, the ninth 
state named in New York's petition), 83 FR 33730 (July 17, 2018).
    Most recently, the EPA acted on five CAA section 126(b) petitions 
submitted by the states of Delaware and Maryland regarding various 
sources in five upwind states with regard to the 2008 and 2015 ozone 
NAAQS. In denying the petitions, the EPA applied the same four-step 
interstate transport framework used in prior rulemakings and relied on 
analysis and determinations made in the CSAPR Update for purposes of 
evaluating the good neighbor obligations with respect to the 2008 ozone 
NAAQS. 83 FR 50444 (October 5, 2018).

D. The CAA Section 126(b) Petition From New York

    On March 12, 2018, the New York State Department of Environmental 
Conservation (NY DEC) submitted a CAA section 126(b) petition alleging 
that emissions from a group of specified upwind sources in Illinois, 
Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Virginia, 
and West Virginia significantly contribute to nonattainment and 
interfere with maintenance of the 2008 and 2015 ozone NAAQS in New York 
State, specifically in the New York-Northern New Jersey-Long Island, 
NY-NJ-CT area (hereafter the New York metropolitan area or NYMA) and in 
Chautauqua County in western New York.
    1. The petition asserts that Chautauqua County and the NYMA have an 
air quality problem for the 2008 and the 2015 ozone NAAQS.
    The petition explains that the EPA designated the Chautauqua County 
area (i.e., Jamestown, New York) as Marginal nonattainment for the 2008 
ozone NAAQS and that the area attained the NAAQS by the Marginal area 
attainment date of July 20, 2015. The petition asserts, however, that 
the area remains in danger of exceeding the ozone NAAQS, particularly 
the 2015 standard.
    The petition also explains that the EPA designated the NYMA as 
Marginal nonattainment for the 2008 ozone NAAQS. The NYMA failed to 
attain the NAAQS by the Marginal attainment deadline of July 20, 2015, 
and the EPA subsequently reclassified the area to a Moderate 
nonattainment area on June 3, 2016.\25\ The petition further asserts 
that all three states in the NYMA (i.e., New York, New Jersey and 
Connecticut) have surpassed their three-percent-per-year emissions 
reductions requirements for the 2008 NAAQS; yet certified monitoring 
data through 2016 and (at the time of the petition submittal) 
preliminary 2017 data indicate that the area is not attaining the 2008 
NAAQS, with one monitor in Connecticut recording a preliminary 2017 
design value of 83 ppb. The petition, thus, concludes that the area 
will likely be designated nonattainment for the 2015 ozone NAAQS.\26\
---------------------------------------------------------------------------

    \25\ The EPA notes that New York submitted its CAA section 
126(b) petition before the EPA proposed to reclassify the NYMA as a 
Serious nonattainment area. 83 FR 56781 (November 14, 2018).
    \26\ The petition asserts that the EPA had not yet issued final 
designations at the time the petition was submitted. On April 30, 
2018, the EPA designated New York-Northern New Jersey-Long Island, 
NY-NJ-CT area as a Moderate nonattainment area, the same as the NYMA 
nonattainment area for 2008 ozone NAAQS. 83 FR 25776 (June 4, 2018).

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

[[Page 22794]]

    2. The petition asserts that NOX transport from the nine 
named states impacts air quality in New York State.
    The petition identifies nine states that were linked to air quality 
problems in New York in the EPA's 2017 contribution modeling in the 
CSAPR Update based on impacts equal to or greater than the threshold of 
one percent of the 2008 NAAQS (or 0.75 ppb or more): Illinois, Indiana, 
Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Virginia and West 
Virginia. The petition also asserts that the high concentrations of 
ozone that are transported to New York are largely the result of 
emissions from major stationary sources of NOX located in 
the linked states. The petition cites efforts by New York and other 
parties to mitigate regional transport of NOX, including 
implementation of the NOX Budget Trading Program under the 
NOX SIP Call and the CSAPR allowance trading programs.
    Additionally, the petition describes a study that allegedly found 
that air transported into Chautauqua County on the worst air quality 
days results in maximum daily ozone concentrations that, on average, 
are within 2 ppb of the 2015 ozone NAAQS and often exceed the standard 
of 70 ppb.\27\ The petition concludes that, given the absence of major 
sources in the Chautauqua County area, reductions in ozone precursor 
emissions are needed from upwind states, especially from sources in 
Illinois, Indiana, Kentucky, Michigan, Ohio, and Virginia.
---------------------------------------------------------------------------

    \27\ The petition discusses the results of a study titled the 
``Dunkirk Monitor Transport Study,'' which presents an analysis of 
back-trajectories used to single out interstate airflow on ``design 
days,'' which the petition defines as days considered in the 
calculation of the design values. The subject days include the four 
days in each year from 2013 to 2017 with the largest daily maximum 
8-hour ozone concentrations at the Dunkirk monitoring site in 
Chautauqua County, New York. The Dunkirk monitoring site is the 
design value monitoring site in Chautauqua County (i.e., the site 
with the highest design value in the county).
---------------------------------------------------------------------------

    3. The petition asserts that facilities emitting (or projected to 
emit) above 400 tons of NOX significantly contribute to air 
quality problems or interfere with maintenance in New York State.
    When analyzing significant ozone contributions, the petition 
considers the highest emitting facilities from the previously named 
linked states. Specifically, the petition identifies EGU and non-EGU 
facilities emitting, or projected to emit, 400 tons per year or more of 
NOX in each of these linked states and asserts that these 
facilities are expected to have the greatest impact on the ability of 
the NYMA and Chautauqua County to attain and maintain the 2008 and 2015 
NAAQS.\28\ The petition asserts that the identified facilities can 
reasonably be retrofitted with control equipment or can operate 
existing controls more frequently to reduce NOX.
---------------------------------------------------------------------------

    \28\ The petition identifies which facilities emit 400 tons per 
year of more of NOX based on 2017 EGU projections by the 
Mid-Atlantic Regional Air Management Association (MARAMA). The 
petition also identifies non-EGU sources emitting greater than 400 
tons of NOX in the 2014 National Emissions Inventory 
(NEI).
---------------------------------------------------------------------------

    The petition provides and uses NY DEC generated air quality 
modeling data to quantify projected 2017 impacts on ozone 
concentrations from the collective NOX emissions of the EGU 
and non-EGU (including oil and gas) facilities that emitted at least 
400 tons-per-year of NOX in each state that was linked in 
the EPA's modeling for the CSAPR Update (``400 tons-per-year 
sources''). According to the petition, results from NY DEC's 
independent modeling analysis show single-day impacts from individual 
states' groups of 400 tons-per-year sources of up to 6.34 ppb in 
Chautauqua County and 4.97 ppb in the New York portion of the NYMA 
nonattainment area.\29\
---------------------------------------------------------------------------

    \29\ The petition provides additional detail regarding the 
modeling methodology. Specifically, the petition notes that NY DEC 
used version 5.0.2 of the Community Multiscale Air Quality (CMAQ) 
model with the EPA's Weather Research Forecast (WRF) 2011 
meteorological data to model hourly ozone concentrations during the 
period May 18 to July 30 for a 2017 ``baseline'' scenario and 
additional state-by-state ``control'' modeling scenarios in which 
emissions from the named sources in a given state were set to zero. 
The petition explains that NY DEC then used the modeled 
concentrations to calculate the 8-hour daily maximum average (MDA8) 
in each grid cell on each day of the modeling period for each 
modeled scenario. The difference in MDA8 concentrations between the 
2017 baseline and each state zero-out run was used to represent the 
contributions on each day. The NY DEC then selected the largest 
single-day contribution from among the highest ozone concentration 
days to support their analysis of contributions relative to a one-
percent-of-the-NAAQS threshold.
---------------------------------------------------------------------------

    The petition asserts that, where the maximum influence from an 
individual state's combined 400 tons-per-year sources exceeds 0.75 ppb 
at a particular monitor, this indicates significant contribution to 
nonattainment or interference with maintenance of the 2008 ozone NAAQS, 
and an influence above 0.70 ppb indicates significant contribution to 
nonattainment or interference with maintenance of the 2015 ozone NAAQS.
    The petition also challenges the applicability of the EPA's 
recently-released 2023 air quality modeling \30\ to this CAA section 
126(b) petition. The petition states that NY DEC has significant 
concerns about the assumptions and results of the EPA's modeling, such 
as the EPA's expectation that uncontrolled EGUs will greatly reduce 
their emissions rates in the absence of unit-level enforceable limits 
and the concern that the EPA may have underestimated the ozone 
concentration results for monitoring sites located near significant 
water bodies based on the treatment of model cells containing a land/
water interface. The petition also asserts that modeling of 2023 is 
insufficient to support good neighbor SIPs and cannot be used to 
support a review of New York's petition because CAA section 126(c) 
explicitly states that compliance must be met ``in no case later than 
three years after the date of [a CAA section 126(b)] finding,'' and 
2023 is more than 3 years after the deadline by which the EPA must act 
on the NY DEC petition. The EPA notes that New York submitted its CAA 
section 126(b) petition before the EPA finalized the Determination 
Rule.
---------------------------------------------------------------------------

    \30\ See the EPA's October 27, 2017 memorandum titled, 
``Supplemental Information on the Interstate Transport State 
Implementation Plan Submissions for the 2008 Ozone National Ambient 
Air Quality Standards under Clean Air Act Section 
110(a)(2)(D)(i)(I)'' that provided future year ozone design values 
for monitoring sites in the U.S. based on updated air quality 
modeling (for 2023) and monitoring data.
---------------------------------------------------------------------------

    4. The petition requests that the EPA establish enforceable 
emissions limitations for the named major NOX sources at 
levels designed to prevent them from significantly contributing to 
nonattainment or interfering with maintenance in New York State.
    The petition requests that the EPA establish permanent and 
enforceable NOX emissions limits based on New York's 
determination of available cost-effective controls. Specifically, the 
petition requests that the named sources be subject to emissions limits 
consistent with Reasonably Available Control Technology (RACT) as 
defined by New York State, which bases its presumptive limits and 
facility-specific control analyses on a standard of $5,000 per ton of 
NOX reduced.\31\ The petition acknowledges that some of the 
facilities identified in the petition may already

[[Page 22795]]

operate with a NOX emissions rate similar to New York's RACT 
limits. Nonetheless, the petition asks that the EPA establish 
enforceable daily emissions limits during the ozone season to require 
these sources to continue to operate at these rates in the future. The 
petition claims that enforceable emissions limits would prevent 
emissions controls from being turned off, which the petition asserts 
occurs when the sources in the state are collectively emitting well-
below their seasonal CSAPR budgets.
---------------------------------------------------------------------------

    \31\ According to the petition, New York's standard of $5,000 
per ton of NOX reduced for RACT is inflation-adjusted. 
Hence, the EPA observes that this cost per ton will not change in 
future years even if inflation leads to increases in NOX 
control costs per ton of NOX reduced beyond current 
estimates. For example, assuming a control cost of $5,000 per ton of 
NOX reduced, a 10 percent inflation rate will yield a 
control cost of $5,500 per ton (1.10 * 5,000), but the inflation-
adjusted RACT basis of $5,000 per ton of NOX reduced 
remains unchanged.
---------------------------------------------------------------------------

    5. Subsequent actions and correspondence regarding the New York 
petition.
    Consistent with CAA section 307(d)(10), the EPA determined that the 
60-day period for responding to New York's petition was insufficient 
for the EPA to complete the necessary technical review, develop an 
adequate proposal, and allow time for notice and comment, including an 
opportunity for public hearing, on a proposed finding regarding whether 
emissions from the group of identified sources in nine states 
(Illinois, Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, 
Virginia and West Virginia) significantly contribute to nonattainment 
and interfere with maintenance of the 2008 and 2015 ozone NAAQS in New 
York State. On May 11, 2018, the EPA published a final rule extending 
the deadline for acting on New York's section 126(b) petition to 
November 9, 2018.\32\
---------------------------------------------------------------------------

    \32\ 83 FR 21909 (May 11, 2018).
---------------------------------------------------------------------------

    Since receiving New York's section 126(b) petition on March 14, 
2018, the EPA has received several letters from the public providing 
information regarding the content of the subject petition. We briefly 
describe those letters here.
    On April 13, 2018, the U.S. Chamber of Commerce submitted a letter 
to the EPA requesting an extension beyond the 60-day statutory deadline 
for petition response and claiming legal and technical deficiencies in 
the New York petition. Specifically, the U.S. Chamber of Commerce 
asserts that the petition over-estimates emissions from ``numerous'' 
facilities identified in the petition and inappropriately includes 
monitoring sites that currently attain the ozone NAAQS. Further the 
U.S. Chamber of Commerce contends that applying New York's definition 
of RACT outside of New York raises ``significant constitutional and 
statutory issues.''
    On June 20, 2018, Sunoco Partners Marketing & Terminals submitted a 
letter to the EPA providing corrections to the operating status of the 
Marcus Hook Refinery, identified in the New York section 126(b) 
petition as the Sunoco Inc. (R&M)/Marcus Hook Refinery, and requesting 
that the EPA remove the identified source from the list of facilities 
emitting more than 400 tons per year of NOX.
    On April 25, 2018, the Air Stewardship Coalition (ASC) submitted a 
letter to the EPA requesting an extension beyond the 60-day statutory 
deadline for petition response citing the technical complexity of the 
New York petition. ASC submitted a follow-up letter on September 24, 
2018, asking the EPA to deny New York's section 126(b) petition. The 
ASC letter asserts that New York State has no ozone attainment issues 
outside of the NYMA and that the NY DEC's independent modeling used a 
``non-standard approach'' that resulted in ``flawed'' results.
    On May 31, 2018, the Midwest Ozone Group (MOG) submitted a letter 
asking the EPA to deny New York's section 126(b) petition. The MOG 
letter asserts that the New York petition is deficient in that it 
incorrectly characterizes the emissions from identified sources and 
states; the petition does not consider exceptional events or 
international transport; and the petition does not consider the EPA's 
most recent modeling showing that all New York monitoring sites will 
attain the 2008 ozone NAAQS. Further, MOG provides the results of its 
own independent modeling of the May 1 through August 31, 2011, ozone 
season run at a 4-kilometer (km) grid resolution rather than the 12 km 
grid resolution used in the EPA's modeling. MOG asserts that at the 
finer resolution, all monitoring sites in New York attain both the 2008 
and the 2015 ozone NAAQS. MOG provided the EPA with supplemental 
comments and analyses on October 19, 2018, and on December 17, 2018. 
MOG asserts that its additional comments further support the EPA's 
denial of the New York section 126(b) petition.
    The EPA acknowledges receipt of these letters and has made them 
available in the docket for this action. However, the EPA is not 
responding directly to these letters in this notice nor is the EPA 
relying on the information provided in these letters as a basis for its 
proposed action. Rather, the EPA encourages interested parties to 
review this proposal and then submit relevant comments during the 
public comment period.

IV. The EPA's Proposed Decision on the CAA Section 126(b) Petition From 
New York

A. The EPA's Approach for Granting or Denying CAA Section 126(b) 
Petitions Regarding the 2008 and 2015 8-Hour Ozone NAAQS

    As discussed in Section III.B of this notice, section 126(b) of the 
CAA provides a mechanism for states and other political subdivisions to 
seek abatement of pollution in other states that may be affecting their 
air quality. Section 126(b) does not, however, identify a specific 
methodology or specific criteria for the Administrator to apply when 
making a CAA section 126(b) finding or denying a petition. Therefore, 
the EPA has the discretion to identify relevant criteria and develop a 
reasonable methodology for making a CAA section 126(b) finding. See, 
e.g., Chevron, U.S.A., Inc. v. NRDC, 467 U.S. 837, 842-43 (1984); 
Smiley v. Citibank, 517 U.S. 735, 744-45 (1996).
    With respect to the statutory requirements of section 126 and 
section 110(a)(2)(D)(i) of the CAA, the EPA has consistently 
acknowledged that Congress created these provisions as two independent 
statutory tools to address the problem of interstate pollution 
transport. See, e.g., 76 FR 69052, 69054 (November 7, 2011).\33\ The 
fact that Congress did not indicate any preference for one over the 
other, suggests that either tool could serve as a legitimate means to 
produce the desired result. While the provisions in CAA section 
110(a)(2)(D)(i) and section 126 are independent, they are also closely 
linked. A violation of the prohibition in CAA section 110(a)(2)(D)(i) 
is a condition precedent for action under CAA section 126(b) and, 
critically, both provisions construe significant contribution to 
nonattainment and interference with maintenance identically (since the 
identical terms are naturally interpreted as meaning the same thing in 
the two linked provisions). See Appalachian Power, 249 F. 3d at 1049-
50.
---------------------------------------------------------------------------

    \33\ Courts have also upheld the EPA's position that CAA 
sections 110(a)(2)(D)(i) and section 126 are two independent 
statutory tools to address the same problem of interstate transport. 
See GenOn REMA, LLC v. EPA, 722 F.3d 513, 520-23 (3d Cir. 2013); 
Appalachian Power, 249 F.3d at 1047.
---------------------------------------------------------------------------

    Thus, in addressing a CAA section 126(b) petition for ozone 
transport, the EPA believes it is appropriate to interpret these 
ambiguous terms (i.e., ``contribute significantly to nonattainment'' 
and ``interfere with maintenance'') consistent with the EPA's past 
approach to evaluating interstate ozone pollution transport

[[Page 22796]]

under the good neighbor provision, and its interpretation and 
application of that related provision of the statute. As described 
further in Section III of this notice, ozone is a regional air 
pollutant and the EPA's previous analyses and regulatory actions have 
evaluated the regional interstate ozone transport problem using a four-
step analytic framework. The EPA most recently applied this four-step 
framework in promulgating the CSAPR Update and the Determination Rule 
to address interstate transport with respect to the 2008 ozone NAAQS 
under CAA section 110(a)(2)(D)(i)(I). This approach is particularly 
applicable with respect to New York's claims regarding the 2008 ozone 
NAAQS because both rulemakings address projected air quality problems 
in New York and the impacts of upwind states, including those named in 
the petition, on such areas. Given the specific cross-reference in CAA 
section 126(b) to the substantive prohibition in CAA section 
110(a)(2)(D)(i), the EPA believes any prior findings made under the 
good neighbor provision are informative--if not determinative--for a 
CAA section 126(b) action. Therefore, in this instance, the EPA's 
decision whether to grant or deny the CAA section 126(b) petition 
regarding the 2008 8-hour ozone NAAQS depends on application of the 
four-step interstate transport framework.
    While the EPA previously applied the four-step interstate transport 
framework and interpreted significant contribution and interference 
with maintenance under CAA section 110(a)(2)(D)(i) for the 2008 ozone 
NAAQS via the CSAPR Update and the Determination Rule, the EPA has not 
yet engaged in a rulemaking action to apply the good neighbor provision 
for the 2015 ozone NAAQS. However, the EPA recently released technical 
information intended to inform states' development of SIPs to address 
the 2015 ozone standard.\34\ This information included the results of 
air quality modeling to identify potential downwind air quality 
problems in 2023, which we discuss in more detail in Section IV.B.1 of 
this document. As part of the memorandum releasing the technical 
information, the EPA acknowledged that states have the flexibility to 
pursue approaches that may differ from the EPA's historical approach to 
evaluating interstate transport in developing their good neighbor 
SIPs.\35\ Nonetheless, the EPA's technical analysis and the potential 
flexibilities identified in the memorandum generally followed the basic 
elements of the EPA's historical four-step interstate transport 
framework. As described previously, CAA section 126(b) does not 
identify a specific methodology or specific criteria for the 
Administrator to apply when making a CAA section 126(b) finding or 
denying a petition. Thus, given the EPA's discretion to identify 
relevant criteria and develop a reasonable methodology to inform a CAA 
section 126(b) finding, the EPA believes that it continues to be 
appropriate for the Agency to evaluate the claims regarding the 2015 
ozone NAAQS in New York's section 126(b) petition consistent with the 
EPA's four-step interstate transport framework used to evaluate other 
ozone NAAQS.
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    \34\ See Information on the Interstate Transport State 
Implementation Plan Submissions for the 2015 Ozone National Ambient 
Air Quality Standards under Clean Air Act Section 110(a)(2)(D)(i)(I) 
(March 27, 2018).
    \35\ The EPA has also released two additional memoranda 
providing guidance to states developing good neighbor SIPs for the 
2015 ozone NAAQS. See Analysis of Contribution Thresholds for Use in 
Clean Air Act Section 110(a)(2)(D)(i)(I) Interstate Transport State 
Implementation Plan Submissions for the 2015 Ozone National Ambient 
Air Quality Standards (August 31, 2018); and Considerations for 
Identifying Maintenance Receptors for Use in Clean Air Act Section 
110(a)(2)(D)(i)(I) Interstate Transport State Implementation Plan 
Submissions for the 2015 Ozone National Ambient Air Quality 
Standards (October 19, 2018). All three memoranda are available in 
the docket for this proposed action and at https://www.epa.gov/airmarkets/memo-and-supplemental-information-regarding-interstate-transport-sips-2015-ozone-naaqs.
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    Accordingly, because the EPA interprets ``contribute significantly 
to nonattainment'' and ``interfere with maintenance'' to mean the same 
thing under both sections 110(a)(2)(D)(i) and 126(b), the EPA's 
decision whether to grant or deny a CAA section 126(b) petition 
regarding both the 2008 and 2015 ozone NAAQS depends on application of 
the analysis used to address CAA section 110(a)(2)(D). That is, the EPA 
assesses whether there is a downwind air quality problem in the 
petitioning state (i.e., step 1 of the four-step interstate transport 
framework); whether the upwind state where the source subject to the 
petition is located is linked to the downwind air quality problem 
(i.e., step 2); and, if such a linkage exists, whether there are cost-
effective emissions reductions available from sources in the upwind 
state to support a conclusion that the sources in the state 
significantly contribute to nonattainment or interfere with maintenance 
of the NAAQS (i.e., step 3).
    In interpreting the phrase ``emits or would emit in violation of 
the prohibition of section [110(a)(2)(D)(i)],'' if the EPA or a state 
has already adopted provisions that eliminate the significant 
contribution to nonattainment or interference with maintenance of the 
NAAQS in downwind states, then there simply is no violation of the CAA 
section 110(a)(2)(D)(i)(I) prohibition. Stated another way, requiring 
additional reductions from upwind sources would result in eliminating 
emissions that do not contribute significantly to nonattainment or 
interfere with maintenance of the NAAQS. Such an action is beyond the 
scope of the prohibition in CAA section 110(a)(2)(D)(i)(I) and, 
therefore, beyond the scope of the EPA's authority to make the 
requested finding under CAA section 126(b). See EME Homer City, 134 S. 
Ct. at 1604 n.18, 1608-09 (holding the EPA may not require sources in 
upwind states to reduce emissions by more than necessary to eliminate 
significant contribution to nonattainment or interference with 
maintenance of the NAAQS in downwind states under the good neighbor 
provision).
    Thus, it follows that if a state already has a SIP that the EPA 
approved as adequate to meet the requirements of CAA section 
110(a)(2)(D)(i)(I) for a specific NAAQS, the EPA would not find that a 
source in that state was emitting in violation of the prohibition of 
CAA section 110(a)(2)(D)(i)(I) absent new information demonstrating 
that the SIP is now insufficient to address the prohibition for that 
NAAQS. Similarly, if the EPA has promulgated a FIP that it has 
determined fully eliminates emissions that significantly contribute to 
nonattainment or interfere with maintenance in a downwind state for a 
specific NAAQS, the EPA has no basis to find that sources in the upwind 
state are emitting or would emit in violation of the CAA section 
110(a)(2)(D)(i)(I) prohibition, absent new information to the contrary 
for that NAAQS.
    The EPA notes that the approval of a SIP or promulgation of a FIP 
implementing CAA section 110(a)(2)(D)(i)(I) constitutes a determination 
that a state's emissions are adequately controlled considering the 
specific facts that the EPA analyzed while approving the SIP or 
promulgating the FIP. If a petitioner produces new data or information 
showing a different level of contribution or other facts the EPA did 
not consider when approving the SIP or promulgating the FIP, compliance 
with a SIP or FIP may not be determinative regarding whether the upwind 
sources emit or would emit in violation of the prohibition of CAA 
section 110(a)(2)(D)(i)(I). See 64 FR 28250, 28274 n.15 (May 25, 1999); 
71 FR 25328, 25336 n.6 (April 28, 2006);

[[Page 22797]]

Appalachian Power, 249 F.3d at 1067 (later developments can be the 
basis for another CAA section 126 petition). Thus, in circumstances 
where a state is implementing a SIP or the EPA is implementing a FIP 
addressing CAA section 110(a)(2)(D)(i)(I), the EPA will evaluate the 
CAA section 126(b) petition to determine if the submitted petition 
raises new information that merits further consideration.

B. The EPA's Evaluation of Whether the Petition Is Sufficient To 
Support a CAA Section 126(b) Finding

    Consistent with the EPA's approach to evaluating several prior CAA 
section 126(b) petitions, the EPA interprets CAA section 126(b) as 
placing an initial burden on the petitioner to establish a technical 
basis for the specific finding requested. Thus, the EPA first looks to 
see if the petition identifies or contains a sufficient basis to make 
the requested finding. See, e.g., 76 FR 19662, 19666 (April 7, 2011) 
(proposed response to petition from New Jersey regarding SO2 
emissions from the Portland Generating Station); 83 FR 16064, 16070 
(April 13, 2018) (final response to petition from Connecticut regarding 
ozone emissions from the Brunner Island Steam Electric Station); 83 FR 
50444, 50452 (October 5, 2018) (final response to petitions from 
Delaware and Maryland regarding ozone emissions from four and 36 EGUs, 
respectively).
    The EPA's interpretation of the statute is reasonable especially 
given the expeditious and limited timeframe Congress allotted to the 
EPA for action on a CAA section 126(b) petition: As described in 
Section III.D.5, Congress provided the EPA with only 60 days from its 
receipt of a CAA section 126(b) petition to hold a hearing and act on 
that petition. Given the short statutory deadline, it is reasonable for 
the EPA to conclude that Congress did not intend a requirement that the 
EPA undertake extensive fact-finding or independent analysis as part of 
its action on a petition and instead place the burden upon the 
petitioner to provide adequate support for a requested finding under 
CAA section 126(b), an interpretation affirmed by the courts. See New 
York v. EPA, 852 F.2d 574 (D.C. Cir. 1988) (upholding the EPA's 
interpretation of the statutory burden in reviewing the EPA's denial of 
separate CAA section 126(b) petitions filed by Pennsylvania, Maine, and 
New York regarding air quality impacts from numerous sources located in 
seven midwestern states); see also see also Citizens Against Ruining 
the Environment v. EPA, 535 F.3d 670 (7th Cir.) (2008) (affirming the 
EPA's similar interpretation of the petitioner's burden under CAA 
section 502(b)(2) given the parallel 60-day deadline for the EPA to 
respond to a title V petition). In New York v. EPA, the D.C. Circuit 
evaluated the EPA's obligation in acting on a CAA section 126(b) 
petition, determining both that the 60-day deadline for action meant 
Congress did not intend for the EPA to undertake a ``litany of tasks'' 
in evaluating the petition and that denial was proper where the states 
failed to substantiate the claims raised in their petitions. Id. 
Accordingly, where a CAA section 126(b) petition does not contain 
sufficient technical information or justification to support the 
requested finding without the EPA undertaking an independent analysis, 
it is reasonable for the EPA to interpret CAA section 126(b) to support 
a denial of the petition.
    The remedy provision under CAA section 126(c) further supports the 
reasonableness of the EPA's interpretation. CAA section 126(c) by 
default requires an existing source to cease operation within 3 months 
if the EPA makes the requested finding under CAA section 126(b). It is 
difficult to imagine that Congress intended to require sources to shut 
down entirely absent a sufficient demonstration that that such an 
extreme remedy was necessary. This concern is exacerbated by the 
provision of CAA section 126(b) that permits a petitioner to target 
``groups of sources,'' as New York did in the petition that is subject 
to this action, because Congress certainly could not have envisioned 
that hundreds of stationary sources would be required to shut down 
within 3 months without a complete and compelling justification. The 
potential for such an unintended consequence further supports the 
placement of burden on the petitioner to demonstrate in the first 
instance whether the identified sources emit or would emit in violation 
of the good neighbor provision. While CAA section 126(c) provides in 
the alternative that the EPA may permit continued operation if it 
establishes emissions limitations for the sources subject to the 
finding, this too is a detailed analytic task that requires time and 
resources to develop.
    While the EPA interprets CAA section 126(b) as putting the burden 
on the petitioner, rather than the EPA, to provide a basis or 
justification for making the requested finding, nothing precludes the 
EPA from choosing to conduct an independent analysis on a discretionary 
basis when the Agency determines it would be helpful in evaluating a 
petition. As discussed in Section III, the EPA has chosen to invoke its 
discretion in prior actions on CAA section 126(b) petitions concerning 
ozone, primarily where the Agency already had technical data or 
findings it could rely on as part of its independent analysis. Notably, 
because this supplemental information already existed at the time the 
EPA acted on those petitions, the EPA could leverage such information 
in its action without undertaking new analyses that would naturally 
take significantly more time and resources to develop.\36\ As further 
described in Sections IV.B.1-3, where the EPA has existing relevant 
information at its disposal that could help inform its proposed 
decision on New York's section 126(b) petition, the EPA is using such 
information as part of its discretionary independent analysis of the 
petition.
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    \36\ See 83 FR 16064 (April 13, 2018); 83 FR 50444 (October 5, 
2018).
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1. The EPA's Evaluation of New York's Petition Considering Step 1
    With respect to step 1 of the four-step interstate transport 
framework, the EPA began by evaluating New York's petition to determine 
whether the state identified a downwind air quality problem 
(nonattainment or maintenance) that may be impacted by ozone transport 
from other states. The EPA conducted this evaluation for Chautauqua 
County and the NYMA regarding both the 2008 and 2015 ozone NAAQS.
    As discussed in Section III.C, the EPA typically focuses its 
analysis regarding potential downwind air quality problems on a future 
analytic year given the forward-looking nature of the good neighbor 
obligation in CAA section 110(a)(2)(D)(i)(I). The good neighbor 
provision requires that states prohibit emissions that ``will'' 
significantly contribute to nonattainment or interfere with maintenance 
of the NAAQS in any other state. The EPA reasonably interprets this 
language as permitting states and the EPA in implementing the good 
neighbor provision to prospectively evaluate downwind air quality 
problems and the need for further upwind emissions reductions. In the 
EPA's prior regional transport rulemakings, the Agency generally 
evaluated whether upwind states ``will'' have such an impact based on 
projections of air quality in the future year that considers the 
timeframes for regionwide implementation of control strategies and the 
timeframe in which a rulemaking requiring such controls would be 
finalized. For the 1998 NOX SIP Call, the EPA used an 
analytic year of 2007. For the 2005 CAIR, the EPA

[[Page 22798]]

used analytic years of 2009 and 2010 for ozone and PM2.5, 
respectively. 63 FR 57450; 70 FR 25241. The D.C. Circuit affirmed the 
EPA's interpretation of ``will'' in CAIR, finding the EPA's 
consideration of future projected air quality (in addition to current 
measured data) to be a reasonable interpretation of an ambiguous term. 
North Carolina, 531 F.3d at 913-14. The EPA applied the same approach 
in finalizing CSAPR in 2011 and the CSAPR Update in 2016 by evaluating 
air quality in 2012 and 2017, respectively. 76 FR 48211; 81 FR 74537.
    Particularly relevant to this action, the EPA also applied this 
interpretation of ``will'' in the 2018 Determination Rule to evaluate 
remaining good neighbor obligations with respect to the 2008 ozone 
NAAQS for the CSAPR Update states, including the nine upwind states 
cited in New York's petition. 83 FR 65889-90. As explained in that 
action, a key decision informing the application of the interstate 
transport framework is the selection of a future analytic year. Several 
court decisions have guided the factors that the EPA considers in 
selecting an appropriate future analytic year for such an analysis. 
First, in North Carolina, the D.C. Circuit held that the timeframe for 
implementation of emissions reductions required by the good neighbor 
provision should be selected by considering the relevant attainment 
dates of downwind nonattainment areas affected by interstate transport 
of air pollution. 531 F.3d at 911-12. Moreover, the Supreme Court and 
the D.C. Circuit have both held that the EPA may not over-control 
upwind state emissions relative to the downwind air quality problems. 
Specifically, the courts found that the Agency may not require 
emissions reductions (at steps 3 and 4 of the interstate transport 
framework) from a state that are greater than necessary to achieve 
attainment and maintenance of the NAAQS in all the downwind areas to 
which that state is linked. See EME Homer City, 134 S. Ct. at 1600-01; 
EME Homer City II, 795 F.3d at 127, 129-30 (on remand from the Supreme 
Court, finding ozone-season NOX budgets for ten states 
invalid because the EPA's modeling showed that the downwind air quality 
problems to which these states were linked would be resolved by the 
time the budgets would be implemented). These court decisions support 
the Agency's choice to use a future analytic year to help ensure that 
any emissions reductions that the EPA may require of sources in upwind 
states do not over- or under-control emissions with respect to downwind 
air quality at the time by which that those controls could feasibly be 
implemented.
    Thus, in determining the appropriate future analytic year for 
purposes of assessing remaining interstate transport obligations for 
the 2008 ozone NAAQS in the Determination Rule, the EPA considered two 
primary factors: (1) The applicable attainment dates for the 2008 ozone 
NAAQS; and (2) the timing to feasibly implement new NOX 
control strategies not previously addressed in the CSAPR Update. As the 
applicable attainment dates, the EPA explained that the next attainment 
dates for the 2008 ozone NAAQS would be July 20, 2021, for 
nonattainment areas classified as Serious, and July 20, 2027, for 
nonattainment areas classified as Severe.
    The EPA then evaluated the timeframe necessary to implement 
additional NOX control strategies at various sources across 
the region. For EGUs, the EPA explained that it was appropriate to give 
particular weight to the timeframe required for implementation of 
selective catalytic reduction (SCR) across the region because of the 
potential for larger emissions reductions as compared to selective non-
catalytic reduction (SNCR). The EPA determined that SCR project 
development and installation may require up to 39 months for an 
individual power plant installing controls on more than one boiler,\37\ 
and that a minimum of 48 months (4 years) is a reasonable time-period 
to allow to complete all necessary steps of SCR projects at EGUs on a 
regional scale, considering the necessary stages of post-combustion 
control project planning, shepherding of labor and material supply, 
installation, coordination of outages, testing, and operation. The EPA 
further concluded that SNCR installations, while generally having 
shorter project timeframes (i.e., up to 16 months for an individual 
power plant installing controls on more than one boiler), share similar 
implementation steps with and need to account for the same regional 
factors as SCR installations.\38\ The EPA, therefore, concluded that it 
may reasonably take up to 4 years to install the new emissions controls 
regionwide for EGUs. 83 FR 65893-901.
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    \37\ See Table 3-1 in Engineering and Economic Factors Affecting 
the Installation of Control Technologies for Multipollutant 
Strategies. EPA Final Report. EPA-600/R-02/073. October 2002. 
Available at https://cfpub.epa.gov/si/si_public_record_report.cfm?Lab=NRMRL&dirEntryId=63473.
    \38\ See the month-by-month evaluation of SNCR installation 
presented in Exhibit A-6 in Engineering and Economic Factors 
Affecting the Installation of Control Technologies for 
Multipollutant Strategies. EPA Final Report. EPA-600/R-02/073. 
October 2002. Available at https://cfpub.epa.gov/si/si_public_record_report.cfm?Lab=NRMRL&dirEntryId=63473. Evaluation 
is also in the EPA's CSAPR Update EGU NOX Mitigation 
Strategies Final Rule TSD. See Docket ID No. EPA-HQ-OAR-2015-0500 
(available at http://www.regulations.gov).
---------------------------------------------------------------------------

    The EPA further explained that many of the same considerations 
affecting the EPA's analysis of regionwide implementation of controls 
at EGUs would also affect the regionwide implementation of controls at 
non-EGUs, which may be more complex considering the diversity of non-
EGU sources as well as the greater number and smaller size of the 
individual sources. The EPA noted that preliminary estimates for the 
implementation of some potential control technologies on non-EGUs only 
account for the time between bid evaluation and startup but do not 
account for additional considerations such as pre-bid evaluation 
studies, permitting, and installation of monitoring equipment. 
Accordingly, the EPA concluded that it was reasonable to assume for 
purposes of the Determination Rule that an expeditious timeframe for 
installing sector- or region-wide controls on non-EGU sources could 
also be 4 years or more. 83 FR 65901-04.
    Considering the timeframes for regionwide implementation of control 
strategies and the timeframe in which a rulemaking requiring such 
controls would be finalized, the EPA concluded that reductions from 
such control strategies were unlikely to be implemented for a full 
ozone season until 2023. The EPA acknowledged that 2023 is later than 
the attainment date for nonattainment areas classified as Serious (July 
20, 2021), but concluded that it was unlikely emissions control 
requirements could be feasibly promulgated and implemented by that 
earlier date. Accordingly, the EPA determined that 2023 was a 
reasonable year to assess downwind air quality to evaluate any 
remaining requirements under the good neighbor provision for the 2008 
ozone NAAQS.\39\ 83 FR 65901-05.
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    \39\ Using the 2023 analytic year also allowed the EPA to begin 
the updated analysis using the data sets originally developed for a 
January 2017 Notice of Data Availability (NODA) (82 FR 1733, January 
6, 2017), which the EPA revised in response to stakeholder feedback. 
Accordingly, the EPA initiated its analysis more quickly than if a 
different year had been chosen, which might have delayed subsequent 
rulemaking actions and therefore emissions reductions.
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    After selecting the analytic year, the EPA then used the 
Comprehensive Air Quality Model with Extensions (CAMx v6.40) to model 
emissions in 2011 and

[[Page 22799]]

2023, based on updates provided to the EPA from states and other 
stakeholders in the January 6, 2017 NODA and an October 27, 2017, EPA 
memorandum.\40\ This updated modeling was used in the Determination 
Rule to estimate ozone design values in 2023, as described in the 
Determination Rule Air Quality Modeling Technical Support Document 
(TSD).\41\ The EPA used outputs from the 2011 and 2023 model 
simulations to project base period 2009-2013 average and maximum ozone 
design values to 2023 at monitoring sites nationwide. In projecting 
future year design values, the EPA applied its own modeling 
guidance,\42\ which recommends using model predictions from the ``3 x 
3'' array of grid cells surrounding the location of the monitoring 
site.\43\ Considering the comments on the January 2017 NODA and other 
analyses, the EPA also projected 2023 design values based on a modified 
version of the ``3 x 3'' approach for those monitoring sites located in 
coastal areas. Briefly, in this alternative approach, the EPA 
eliminated from the design value calculations those modeling data in 
grid cells that are dominated by water (i.e., more than 50 percent of 
the area in the grid cell is water) and that do not contain a 
monitoring site (i.e., if a grid cell is more than 50 percent water but 
contains an air quality monitor, that cell would remain in the 
calculation).\44\ For each individual monitoring site, the base period 
2009-2013 average and maximum design values, 2023 projected average and 
maximum design values based on both the ``3 x 3'' approach and the 
alternative approach affecting coastal sites are available in Excel 
format in the docket for this action and at https://www.epa.gov/airmarkets/october-2017-memo-and-information-interstate-transport-sips-2008-ozone-naaqs.
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    \40\ See Notice of Availability of the Environmental Protection 
Agency's Preliminary Interstate Ozone Transport Modeling Data for 
the 2015 Ozone National Ambient Air Quality Standard (NAAQS), 82 FR 
1733 (January 6, 2017). This memorandum also supplements the 
information provided in, ``Supplemental Information on the 
Interstate Transport State Implementation Plan Submissions for the 
2008 Ozone National Ambient Air Quality Standards under Clean Air 
Act Section 110(a)(2)(D)(i)(I).'' Memorandum from Stephen D. Page, 
Director, U.S. EPA Office of Air Quality Planning and Standards, to 
Regional Air Division Directors, Regions 1-10. October 27, 2017. 
Available at https://www.epa.gov/sites/production/files/2017-10/documents/final_2008_o3_naaqs_transport_memo_10-27-17b.pdf.
    \41\ Air Quality Modeling Technical Support Document for the 
Updated 2023 Projected Ozone Design Values. U.S. EPA Office of Air 
Quality Planning and Standards. June 2018. Document developed to 
support the Determination Rule, 83 FR 65878 (December 21, 2018). 
Available at https://www.epa.gov/airmarkets/air-quality-modeling-technical-support-document-updated-2023-projected-ozone-design.
    \42\ ``Draft Modeling Guidance for Demonstrating Attainment of 
Air Quality Goals for Ozone, PM2.5, and Regional Haze.'' 
Memorandum from Richard Wayland, Division Director, Air Quality 
Assessment Division, U.S. EPA Office of Air Quality Planning and 
Standards, to Regional Air Division Directors, Regions 1-10. 
December 3, 2014. Available at https://www3.epa.gov/scram001/guidance/guide/Draft-O3-PM-RH-Modeling_Guidance-2014.pdf.
    \43\ The EPA's modeling uses 12 km\2\ grid cells.
    \44\ A model grid cell is identified as a ``water'' cell if more 
than 50 percent of the grid cell is water based on the 2006 National 
Land Cover Database. Grid cells that meet this criterion are treated 
as entirely over water in the WRF modeling used to develop the 2011 
meteorology for the EPA's air quality modeling. (See Air Quality 
Modeling Technical Support Document for the Updated 2023 Projected 
Ozone Design Values. U.S. EPA Office of Air Quality Planning and 
Standards. June 2018. Document developed to support the 
Determination Rule, 83 FR 65878 (December 21, 2018). Available at 
https://www.epa.gov/airmarkets/air-quality-modeling-technical-support-document-updated-2023-projected-ozone-design.)
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    In the Determination Rule, the EPA followed the same approach for 
identifying receptors based on this modeling as in the CSAPR Update 
rulemaking process. That is, the EPA considered a combination of 
modeling projections and monitoring data to identify receptor sites 
that are projected to have problems attaining or maintaining the 
NAAQS.\45\ Specifically, the EPA identified nonattainment receptors as 
those monitoring sites with current measured values exceeding the NAAQS 
that also have projected (i.e., in 2023) average design values 
exceeding the NAAQS. The EPA also identified maintenance receptors as 
those monitoring sites with projected maximum design values exceeding 
the NAAQS. Specifically, maintenance receptors included sites with 
current measured values below the NAAQS with projected average and 
maximum design values exceeding the NAAQS and monitoring sites with 
projected average design values below the NAAQS but with projected 
maximum design values exceeding the NAAQS.
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    \45\ See 81 FR 74530-74532 (October 26, 2016).
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    Pertinent to this action, the EPA's examination in the 
Determination Rule of the 2023 projected design values for Chautauqua 
County indicates that this area is not projected to be in nonattainment 
or have a maintenance problem in 2023 for either the 2008 or the 2015 
ozone NAAQS. The EPA's examination of the 2023 projected design values 
for the NYMA indicates that this area is not projected to be in 
nonattainment or have a maintenance problem in 2023 for the 2008 ozone 
NAAQS. However, the modeling indicates that the NYMA is projected to be 
in nonattainment in 2023 with respect to the 2015 ozone NAAQS.
    Because the EPA has already conducted a rulemaking evaluating good 
neighbor obligations for the 2008 ozone NAAQS under CAA section 
110(a)(2)(D)(i)(I) and because, as discussed previously, CAA section 
126(b) directly incorporates the CAA section 110(a)(2)(D)(i) standard, 
the EPA believes it is also appropriate to consider the 2023 modeling 
conducted for the Determination Rule in evaluating whether New York's 
petition has adequately demonstrated that there will be a downwind air 
quality problem with respect to the 2008 ozone NAAQS in Chautauqua 
County and the NYMA. Moreover, the EPA believes it is appropriate to 
consider the 2023 modeling when evaluating the petition's claims with 
respect to the 2015 ozone NAAQS because the 2023 ozone season aligns 
with the attainment year for Moderate ozone nonattainment areas.\46\ 
While the EPA is not reopening the analysis and findings made in the 
Determination Rule with respect to the 2008 ozone NAAQS in this action, 
the EPA is evaluating the petition, consistent with the standard of 
review described in Section IV.A, to determine whether additional 
information not considered in the Determination Rule should influence 
the EPA's finding as to whether the sources named in New York's 
petition emit or would emit in violation of the prohibition of CAA 
section 110(a)(2)(D)(i)(I).
---------------------------------------------------------------------------

    \46\ The 2023 ozone season represents the last full season from 
which data can be used to determine attainment with the 2015 ozone 
NAAQS by the August 3, 2024, attainment date for nonattainment areas 
classified as Moderate.
---------------------------------------------------------------------------

    The EPA notes that the petition asserts that the EPA cannot use its 
2023 modeling to support a review of the petition in part because the 
2023 analytic year does not fit the timeframe under CAA section 126(c), 
which requires that compliance with any CAA section 126(b) finding must 
be met ``in no case later than three years after the date'' of such 
finding. However, the EPA's evaluation of air quality in 2023 is a 
necessary step to determine whether the sources named in New York's 
petition are in violation of the good neighbor provision in the first 
instance, and, thus, subject to the provisions of CAA section 126(c). 
Moreover, the choice of 2023 as an analytic year does not preclude the 
implementation of a remedy in an earlier year if the necessary finding 
is made under CAA section 126(b). If the EPA were to determine based on 
its analysis of the 2023 projections that the named sources emit or 
would emit in violation of the good neighbor provision, the EPA could

[[Page 22800]]

still implement a remedy that complies with the earlier timeline set 
out under CAA section 126(c). Therefore, the EPA's reasonable choice of 
2023 as an analytic year for evaluating New York's petition does not, 
in and of itself, preclude implementation of a remedy at an earlier 
date.
    The New York petition further raises concerns about the assumptions 
and results of the EPA's modeling. Specifically, the petition indicates 
significant concerns with the EPA's expectation that uncontrolled EGUs 
will greatly reduce their emissions rates in the absence of unit-level 
enforceable limits and with the EPA's treatment of model cells 
containing a land/water interface. The petition does not further 
elaborate on the basis for these concerns, and the EPA, therefore, has 
no reason to believe that its 2023 modeling is unreliable. Moreover, 
the EPA already addressed concerns regarding the EGU assumptions in the 
2023 modeling in response to comments raised in the Determination Rule. 
See 83 FR 65886-89 (explaining statutory rationale regarding when 
enforceable emissions limitations are required and responding to 
comments); 83 FR 65913-15 (responding to comments concerning 
projections of EGU emissions in 2023). As described earlier in this 
section, the EPA also addressed concerns regarding the treatment of 
model cells containing land/water interface in the Determination Rule 
by calculating design values using two different methodologies. The 
petition does not provide any new information not already considered by 
the EPA in the Determination Rule as to these issues and therefore, has 
no basis to reconsider its conclusions finalized in that action.
    The next two sections discuss the EPA's evaluation of the 
petition's step 1 analysis regarding Chautauqua County and the NYMA 
with respect to both the 2008 and 2015 ozone NAAQS. The EPA first 
evaluates the sufficiency of the analysis provided in the petition for 
each area and then considers how the 2023 modeling or other pertinent 
information should inform the EPA's conclusion regarding whether there 
will be downwind nonattainment or maintenance concerns in each area 
with respect to each NAAQS.
Chautauqua County
    First, for Chautauqua County, New York's petition does not provide 
sufficient information to demonstrate that there will be a downwind 
nonattainment or maintenance problem with respect to either the 2008 or 
the 2015 ozone NAAQS. Although the petition correctly indicates that 
the EPA previously designated Chautauqua County as Marginal 
nonattainment under the 2008 ozone NAAQS, the petition did not 
demonstrate that there will be a future nonattainment or maintenance 
problem in that area for that NAAQS that must be addressed under the 
good neighbor provision. While a prior designation of an area as 
nonattainment may provide useful information for purposes of analyzing 
interstate transport under the good neighbor provision, designations 
themselves are not dispositive of whether a downwind area will have an 
air quality problem in the future.\47\ As discussed earlier, the EPA 
evaluates downwind ozone air quality problems for purposes of step 1 of 
the four-step interstate transport framework using observed and modeled 
future air quality concentrations for a year that considers the 
relevant attainment deadlines for the NAAQS and the anticipated 
compliance timeframe for potential control strategies.\48\ New York's 
section 126(b) petition does not include analyses indicating that 
Chautauqua County may be violating or have difficulty maintaining the 
2008 or 2015 ozone NAAQS either currently or in a relevant future year. 
In fact, the petition acknowledges that this area attained the NAAQS by 
the relevant attainment date. The petition also did not present air 
quality projections indicating that Chautauqua County will not be in 
attainment or will struggle to maintain the NAAQS in a relevant future 
year. The petition alleges that the area remains in danger of exceeding 
the ozone NAAQS but does not provide any evidence to support this 
assertion. Thus, the petition has not established that emissions from 
the named sources are linked to a nonattainment or maintenance problem 
in Chautauqua County.
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    \47\ The EPA has consistently taken the position that CAA 
section 110(a)(2)(D) refers to prevention of ``nonattainment'' in 
any area in another state, not only in designated nonattainment 
areas. See, e.g., Clean Air Interstate Rule, 70 FR 25162, 25265 (May 
12, 2005); Cross-State Air Pollution Rule, 76 FR 48208, 48211 (Aug. 
8, 2011); Final Response to Petition from New Jersey Regarding 
SO2 Emissions From the Portland Generating Station, 76 FR 
69052 (Nov. 7, 2011) (finding facility in violation of the 
prohibitions of CAA section 110(a)(2)(D)(i)(I) with respect to the 
2010 SO2 NAAQS prior to issuance of designations for that 
standard).
    \48\ 81 FR 74517.
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    Additionally, the EPA has air quality data that support an 
independent analysis of step 1 of the four-step interstate transport 
framework to assess whether Chautauqua County will have an air quality 
problem relative to either the 2008 or the 2015 ozone NAAQS. First, the 
2015-2017 design value in Chautauqua County is 68 ppb, which is below 
the level of both the 2008 and 2015 ozone NAAQS.\49\ Furthermore, the 
EPA recently finalized a determination that the Jamestown, New York 
Marginal nonattainment area (Chautauqua County) has attained the 2008 
ozone NAAQS.\50\ Additionally, the EPA's recent air quality modeling 
described earlier in this section indicates that the monitor in 
Chautauqua County is expected to continue to both attain and maintain 
the standard in 2023, with an average 2023 design value of 58.5 ppb and 
a maximum 2023 design value of 60.7 ppb.\51\ Consequently, due to the 
facts that the petition has not identified an air quality problem in 
Chautauqua County for the 2008 or 2015 ozone NAAQS, that the EPA's 
independent analysis affirms that Chautauqua County is attaining both 
the 2008 and 2015 ozone NAAQS, and that all available evidence 
indicates that the monitoring sites will continue to attain and 
maintain the NAAQS in the future, the EPA is proposing to deny New 
York's petition regarding Chautauqua County for both the 2008 and the 
2015 ozone NAAQS.
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    \49\ The 2015-2017 design value for Chautauqua County in the 
``Jamestown-Dunkirk-Fredonia, NY CBSA'' at AQS site 360130006 is 68 
ppb. Available at https://www.epa.gov/sites/production/files/2018-07/ozone_designvalues_20152017_final_07_24_18.xlsx.
    \50\ See Approval and Promulgation of Air Quality Implementation 
Plans; New York; Determination of Attainment of the 2008 8-Hour 
Ozone National Ambient Air Quality Standard for the Jamestown, New 
York Marginal Nonattainment Area, 83 FR 49492 (October 2, 2018).
    \51\ See 2023 design values for AQS site 360130006 in 
spreadsheet released with the EPA's March 2018 memorandum. Available 
at https://www.epa.gov/sites/production/files/2018-05/updated_2023_modeling_dvs_collective_contributions.xlsx.
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New York Metropolitan Area
    Second, with respect to the NYMA, the petition does not provide 
sufficient information to indicate that there will be a future 
nonattainment or maintenance problem with respect to the 2008 ozone 
NAAQS. As described in Section III.D of this notice, the petition 
correctly asserts that the NYMA was designated nonattainment for the 
2008 ozone NAAQS and has failed to attain the NAAQS by the attainment 
deadline. Additionally, the petition points to preliminary 2015-2017 
air quality data indicating that some monitoring sites in the NYMA are 
above the 2008 NAAQS. However, the EPA does not agree that an area's 
current attainment status alone is sufficient evidence regarding 
whether there will be a nonattainment or maintenance problem that must 
be addressed under either the good neighbor provision or CAA section 
126.

[[Page 22801]]

Rather, as previously discussed, the EPA evaluates whether there will 
be downwind nonattainment or maintenance concerns in each area with 
respect to each NAAQS under the good neighbor provision (and, thus, 
also under CAA section 126(b)) using observed and modeled future air 
quality concentrations for a relevant future analytic year.
    Further, the EPA has additional information related to potential 
projected nonattainment or maintenance problems in the NYMA. The EPA's 
recent air quality projections for 2023, based on the latest available 
emissions inventory, indicate that all monitoring sites in the NYMA 
will attain and maintain the 2008 ozone NAAQS. As discussed in Section 
III.C.2 of this notice, the EPA already determined that the CSAPR 
Update fully addresses the good neighbor provision requirements for the 
2008 ozone NAAQS for all eastern states previously addressed in that 
rule. This analysis indicates that all remaining receptors for the 2008 
ozone NAAQS identified in the CSAPR Update, including those in the 
NYMA, are expected to attain and maintain that NAAQS in 2023 under step 
1 of the four-step interstate transport framework, and, therefore, 
upwind states have no remaining obligations under the good neighbor 
provision. New York has not provided any new information that 
contradicts the EPA's conclusion in the Determination Rule that the 
NYMA will no longer have an air quality problem in the future. 
Therefore, the EPA is proposing to deny New York's petition regarding 
the 2008 ozone NAAQS in the NYMA because New York has not demonstrated 
that there will be a nonattainment or maintenance problem in the NYMA 
in a relevant future year and the EPA's own analysis projects that 
there will be no air quality problems under step 1.
    Regarding the 2015 ozone NAAQS, the EPA's projections indicate that 
the average design value for five of the six monitoring sites in the 
NYMA and the maximum design values at all six monitoring sites in the 
NYMA will be above the 2015 ozone NAAQS in 2023.\52\ Therefore, 
although New York did not evaluate whether there will be an air quality 
problem with respect to the 2015 ozone NAAQS in a future year, the 
EPA's independent analysis of step 1 of the interstate transport 
framework indicates that the NYMA is projected to have a downwind air 
quality problem relative to the 2015 NAAQS.
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    \52\ The EPA also notes that four of the six monitoring sites 
are in the state of Connecticut and two monitoring sites are in New 
York. However, the EPA interprets CAA section 126(b)'s petition 
authority to be limited to states and political subdivisions seeking 
to address interstate transport of pollution impacting downwind 
receptors within their geographical borders. See 83 FR 50460.
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2. The EPA's Evaluation of New York's Petition Considering Step 2
    With respect to step 2 of the four-step interstate transport 
framework, the EPA evaluated New York's petition to determine whether 
there is sufficient information to conclude that the state identified 
that the upwind states where the sources named in the petition are 
located are linked to a downwind air quality problem. Because, as 
described earlier, neither the information in the petition nor existing 
information available to the EPA indicates there will be downwind 
nonattainment or maintenance concerns in Chautauqua County with respect 
to the 2008 and 2015 ozone NAAQS, or in the NYMA with respect to the 
2008 ozone NAAQS, the EPA has no basis to find a linkage at step 2 of 
the four-step framework between the named upwind states and these 
downwind areas with regard to the respective NAAQS.
    With respect to the NYMA for the 2015 ozone NAAQS, existing 
information available to the EPA supports an assessment that emissions 
from at least some of the states named in the petition are linked to a 
downwind air quality problem at step 2. As the following paragraphs 
explain, the linkages between upwind and downwind states are further 
informed by an air quality screening threshold.
    Historically, at step 2, the EPA has used an air quality screening 
threshold to determine whether a state contributes to a downwind air 
quality problem in amounts that warrant further evaluation as part of a 
multi-factor analysis in step 3. Upwind states that impact a downwind 
receptor by less than the screening threshold do not contribute to the 
downwind air quality problem at step 2. The EPA has therefore 
previously determined, without conducting any additional analysis, that 
such states do not significantly contribute to nonattainment or 
interfere with maintenance of the NAAQS under the good neighbor 
provision. Upwind states that impact a downwind receptor at or above 
the threshold are identified as contributing to a downwind air quality 
problem (i.e., they are said to be ``linked'' to that downwind 
receptor). The EPA then proceeds to the multi-factor step 3 analysis to 
determine if the linked upwind state significantly contributes to 
nonattainment or interferes with maintenance of the NAAQS at the 
downwind receptor(s).\53\
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    \53\ Note that upwind states that are linked to a downwind 
receptor at step 2 may nevertheless be found to not significantly 
contribute to nonattainment or interfere with maintenance at the 
receptor depending on the outcome of the step 3 analysis.
---------------------------------------------------------------------------

    In previous federal actions,\54\ the EPA's analysis of the sum of 
contributions from all linked upwind states (i.e., collective 
contribution) concluded that a screening threshold equivalent to 1 
percent of the 1997 and 2008 ozone NAAQS was appropriate at step 2. In 
an August 31, 2018, memorandum, the EPA presented the results of our 
analysis of collective contribution for the 2015 ozone NAAQS \55\ using 
data drawn from the results of the EPA's updated 2023 modeling.\56\ 
This analysis, which followed the thresholds analyses conducted in both 
the CSAPR and CSAPR Update rulemakings,57 58 included the 
evaluation of data pertinent to several potential thresholds (i.e., 1 
percent of the 2015 ozone NAAQS or 0.70 ppb, 1 ppb and 2 ppb) that 
could be applicable to the development of SIP revisions to address the 
2015 ozone NAAQS of 70 ppb. The EPA ultimately suggested in this 
memorandum that a threshold of 1 ppb may be appropriate for states to 
use to develop SIP revisions addressing the good neighbor provision for 
the 2015 ozone NAAQS.
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    \54\ In the Cross-State Air Pollution Rule (CSAPR), the EPA used 
0.80 parts per billion (ppb) as the threshold, which is 1 percent of 
the 1997 ozone NAAQS. 76 FR 48208, 48238 (August 8, 2011). Most 
recently, in the Cross-State Air Pollution Rule Update for the 2008 
Ozone NAAQS (CSAPR Update), the EPA used 0.75 ppb as the threshold, 
which is 1 percent of the 2008 ozone NAAQS. 81 FR 74504, 74518 
(October 26, 2016).
    \55\ See Analysis of Contribution Thresholds for Use in Clean 
Air Act Section 110(a)(2)(D)(i)(I) Interstate Transport State 
Implementation Plan Submissions for the 2015 Ozone National Ambient 
Air Quality Standards (August 31, 2018).
    \56\ Information on the Interstate Transport State 
Implementation Plan Submissions for the 2015 Ozone National Ambient 
Air Quality Standards under Clean Air Act Section 110(a)(2)(D)(i)(I) 
(March 2018). https://www.epa.gov/airmarkets/march-2018-memo-and-supplemental-information-regarding-interstate-transport-sips-2015.
    \57\ Air Quality Modeling Technical Support Document for the 
Final Cross State Air Pollution Rule Update (August 2016). https://www.epa.gov/airmarkets/air-quality-modeling-technical-support-document-final-cross-state-air-pollution-rule.
    \58\ Air Quality Modeling Final Rule Technical Support Document 
(for the Final Transport Rule now known as CSAPR; June 2011). 
https://www.epa.gov/csapr/air-quality-modeling-final-rule-technical-support-document.
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    In addition to the 2023 modeling used to identify potential 
downwind air quality problems described in the prior section, the EPA 
has also performed state-level ozone source apportionment

[[Page 22802]]

modeling to provide information regarding the expected contribution of 
statewide, anthropogenic NOX and VOC emissions in each state 
to projected 2023 ozone concentrations. If the EPA applies a 1 percent 
threshold like that used in prior rulemakings (e.g., 0.70 ppb) to the 
results of the contribution modeling, the EPA's analysis indicates that 
all nine upwind states named in the petition are linked to an air 
quality problem in the NYMA for the 2015 ozone NAAQS. If the EPA 
instead applies the alternative 1 ppb threshold, the EPA's analysis 
indicates that the sources in six (i.e., Maryland, Michigan, Ohio, 
Pennsylvania, Virginia and West Virginia) of the nine states named in 
New York's petition are linked to an air quality problem in the NYMA 
for the 2015 ozone NAAQS, while three states (i.e., Illinois, Indiana 
and Kentucky) are not.\59\ The EPA is not in this action determining 
which of the potential thresholds described in this section (i.e., 1 
percent of the NAAQS (0.70 ppb) or 1 ppb) is appropriate for addressing 
collective contribution for the 2015 ozone NAAQS for purposes of New 
York's petition. However, the EPA acknowledges that emissions from at 
least some of the named upwind states are linked to projected air 
quality problems in the NYMA for the 2015 ozone NAAQS. Therefore, the 
EPA will evaluate, in the following section, whether the petition has 
adequately demonstrated at step 3 of the four-step interstate transport 
framework that the sources in the upwind states will significantly 
contribute to nonattainment or interfere with maintenance of the NAAQS.
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    \59\ As identified previously in this notice, the EPA's recent 
modeling included essentially all the EGUs at the facilities named 
in the New York petition. We say ``essentially'' because the New 
York petition identifies sources at the facility, rather than at the 
unit, level while the EPA looks at unit-level data and includes all 
fossil-fuel-fired boiler or combustion turbine EGUs with a capacity 
(electrical output) greater than 25 MW. See Information on the 
Interstate Transport State Implementation Plan Submissions for the 
2015 Ozone National Ambient Air Quality Standards under Clean Air 
Act Section 110(a)(2)(D)(i)(I) (March 27, 2018).
---------------------------------------------------------------------------

3. The EPA's Evaluation of New York's Petition Considering Step 3
    As described in Section III.C.1 of this notice, once an upwind 
state is linked to a downwind air quality problem at steps 1 and 2 of 
the four-step interstate transport framework, the next step is to 
identify the emissions reductions, if any, needed from particular 
sources to eliminate the upwind state's significant contribution to 
nonattainment and interference with maintenance of the NAAQS (i.e., 
step 3 of the four-step interstate transport framework).\60\ For the 
reasons discussed in the following paragraphs, the EPA is proposing to 
find that material elements in New York's assessment of step 3 are 
insufficient, such that the EPA cannot conclude that any source or 
group of sources in any of the named states will significantly 
contribute to nonattainment or interfere with maintenance in Chautauqua 
County or the NYMA relative to the 2008 and 2015 ozone NAAQS. Thus, the 
EPA is proposing to deny the petition as to all named sources in all 
the named upwind states because New York has not met its burden to 
demonstrate that the sources emit or would emit in violation of the 
good neighbor provision with respect to either the 2008 or 2015 ozone 
NAAQS. We also note that the petition addresses hundreds of sources 
across nine states. The EPA is taking comment on whether to also deny 
the petition because the petitioner has not provided justification for 
the proposition that identification of such a large, undifferentiated 
number of sources located in numerous upwind states constitutes a 
``group of stationary sources'' within the context of CAA section 
126(b). For example, ``group of stationary sources'' could mean 
stationary sources within a geographic region, sources identified by a 
specific North American Industry Classification System (NAICS) Code, 
sources emitting over a defined threshold and/or any combination of 
these or other defining characteristics. Although the EPA already has 
identified a sufficient basis to propose denial of the petition as to 
Chautauqua County (for the 2008 and 2015 ozone NAAQS) and NYMA (for the 
2008 ozone NAAQS) at step 1 of the four-step framework, the EPA is also 
relying on our analysis of step 3 as an additional and independent 
basis for denial as to the petition's claims for these areas.
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    \60\ Contrary to New York's assertion in its petition, 
identification of a linkage between an upwind state and a downwind 
receptor does not conclude the determination regarding whether 
sources in the upwind state will significantly contribute to 
nonattainment or interfere with maintenance of the NAAQS. The 
conclusion that a state's emissions met or exceeded the threshold 
only indicated that further analysis was appropriate to determine 
whether any of the upwind state's emissions met the statutory 
criteria under the good neighbor provision. See EME Homer City, 134 
S. Ct. at 1596-97 (noting upwind states are only obliged to 
eliminate emissions meeting both the step 2 and 3 inquiries).
---------------------------------------------------------------------------

    As discussed in Section III.C.1 of this notice, within step 3 of 
the four-step interstate transport framework, the EPA has historically 
considered several factors to determine whether sources in linked 
upwind states have emissions that will significantly contribute to 
nonattainment or interfere with maintenance of the ozone NAAQS. In 
particular, the EPA has generally considered various control, cost, and 
air quality factors and data, including: The types of control 
strategies that can be implemented at sources within the upwind states; 
the costs of implementing such control strategies; the amount of 
potential emissions reductions from implementation of control 
strategies at upwind sources; the potential downwind air quality 
improvements from such emissions reductions and the severity of the 
downwind air quality problem (i.e., whether the air quality problem 
will be resolved through implementation of the emissions reductions). 
See 76 FR 48248-49 and 48254-55; 81 FR 74519; Ozone Transport Policy 
Analysis Final Rule TSD, p. 3 (Docket ID No. EPA-HQ-OAR-2015-0500). The 
EPA has typically considered these various cost and air quality factors 
in a multifactor analysis to identify the appropriate uniform level of 
emissions controls to apply to sources across a region of upwind states 
that are collectively linked to downwind air quality problems and, 
based on the selected level of control, to quantify the amount of 
emissions (if any) from each upwind state that contribute to 
nonattainment or interfere with maintenance in a downwind area and, 
thus, should be subject to control.\61\ In these prior rules, the EPA 
has selected the level of control stringency deemed cost-effective when 
these factors are balanced together. Assessing multiple factors allows 
the EPA to consider the full range of circumstances and state-specific 
factors that affect the relationship between upwind emissions and 
downwind nonattainment and maintenance problems. For example, the EPA's 
assessment of cost considerations accounts for the existing level of 
controls at sources in upwind states as well as the potential for, and 
relative

[[Page 22803]]

difficulty of, achieving additional emissions reductions.\62\ 
Additionally, assessment of the downwind air quality impacts from the 
potential upwind emissions reductions is essential to determining 
whether various levels of potential control stringency would under- or 
over-control upwind state emissions relative to the identified downwind 
air quality problems. The Supreme Court has found the EPA's approach to 
apportioning emissions reduction responsibility among multiple upwind 
states to be ``an efficient and equitable solution to the allocation 
problem'' presented by the good neighbor provision for regional 
problems like the transport of ozone pollution. EME Homer City, 134 S. 
Ct. at 1607.
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    \61\ For example, in the CSAPR Update (81 FR 74505), the EPA 
noted that ozone transport occurs on a regional scale, that such 
transport is responsive to changes in NOX emissions, and 
that NOX emissions reductions from EGUs were effective in 
reducing 8-hour peak ozone concentrations during the ozone season. 
Accordingly, the EPA selected a uniform control stringency to apply 
to states covered by the rule by identifying the emissions reduction 
potential from EGUs in linked upwind states available at various 
levels of control stringency represented by cost, assessed how these 
potential emissions reductions would affect each state's air quality 
contributions to each receptor, evaluated the total change in air 
quality at each receptor resulting from the emissions reductions, 
and evaluated whether the air quality problems at each receptor 
would be resolved. The EPA applied a similar approach in the CSAPR 
Final Rule. 76 FR 48248 (August 8, 2011).
    \62\ See CSAPR Final Rule. 76 FR 48248 (August 8, 2011).
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    As discussed in Section IV.A, the EPA interprets the substantive 
standard under CAA section 126(b) consistent with its interpretation of 
the good neighbor provision in CAA section 110(a)(2)(D)(i). 
Accordingly, the EPA believes it could be reasonable to consider the 
same factors whether evaluating ozone transport in the context of a 
good neighbor SIP under CAA section 110 or a section 126(b) petition. 
Thus, the EPA has reviewed New York's petition to determine whether it 
has provided sufficient information to support a determination based on 
the same type of cost and air quality factors that the EPA evaluated in 
past rulemakings addressing regional ozone transport under the good 
neighbor provision. The EPA notes that it considered these factors in 
the CSAPR Update and implemented emissions reductions found to be cost-
effective at EGUs (including within the upwind states identified in New 
York's petition) by the 2017 ozone season, but it did not evaluate 
potential control strategies available on a longer implementation 
timeframe or at non-EGUs. 81 FR 74521-22. The EPA has not conducted a 
regional step 3 analysis for any sources with respect to the 2015 ozone 
NAAQS, but nonetheless believes consideration of the same type of cost 
and air quality factors could be reasonable for evaluating upwind state 
obligations under the good neighbor provision for that standard.
    The EPA's review of the petition indicates that New York has not 
sufficiently developed or evaluated the cost and air quality data and 
factors that the EPA has generally relied on in step 3, has not 
conducted any sort of multifactor analysis to determine whether cost-
effective controls are available at the named sources, and has not 
provided any alternative analysis that would support a conclusion at 
step 3 that the named sources will significantly contribute to 
nonattainment or interfere with maintenance of the NAAQS. The petition, 
therefore, has not adequately supported the conclusions that the 
sources named in its petition will significantly contribute to 
nonattainment or interfere with maintenance of either the 2008 or the 
2015 ozone NAAQS. Here, the petition simply names facilities that 
appear to have larger emissions than other facilities (at least 400 
tons of NOX per year) without supporting why the named 
facilities should make certain reductions. The petition could have 
included one or more of the following potential analyses to evaluate, 
compare and identify ``significant'' emissions from of the named 
sources, consistent with the EPA's past practice in evaluating regional 
ozone transport: (i) Verifying that the named sources whose emissions 
are those from the most recent emissions inventory continue to emit 
NOX at the same rate or continue to operate; \63\ (ii) 
describing or quantifying potentially available emissions reductions 
from the named sources (i.e., the control technologies/techniques and 
the costs of those control technologies/techniques); (iii) describing 
the downwind air quality impacts of controlling the named sources 
relative to other sources; or (iv) providing information on the 
relative cost of the available emissions reductions and whether they 
are less expensive than other reductions from other sources. In the 
absence of such analyses, the petition has not demonstrated, based on 
information available at this time, that the sources named in the 
petition should be required to make further emissions reductions under 
the good neighbor provision.
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    \63\ Such information may be found in the EPA's Enforcement and 
Compliance Data (ECHO), which is a publicly available database 
containing information for nearly all point sources in the U.S. Data 
are typically updated several times a month. The operating status of 
the point source at the facility level is available. Thus, the 
operating status of non-EGU point sources can be determined outside 
of having an up to date NEI version available. This is likely to be 
accurate for the operating status of EGUs as well.
---------------------------------------------------------------------------

    The petition also has not demonstrated how relevant cost and air 
quality factors should be weighed to determine an appropriate level of 
control for the named sources. Instead, the petition simply suggests 
that upwind sources should be subject to a comparable level of control 
as sources in downwind states (i.e., the $5,000/ton level of control 
sources in New York are subjected to for purposes of RACT). While 
information such as costs of controls in the downwind area may provide 
useful data for consideration when evaluating upwind emissions 
reduction potential, such information is not determinative of the 
appropriate level of upwind control. Nothing in the text of the good 
neighbor provision indicates that upwind states are required to 
implement RACT, which is a requirement that applies to designated 
nonattainment areas, see CAA section 172(c)(1) (nonattainment areas 
generally), 182(b)(2) (ozone nonattainment areas classified as 
Moderate), nor does the provision require uniformity of control 
strategies imposed in both upwind and downwind states. Rather, the 
provision indicates that states are required to prohibit those 
emissions which ``contribute significantly to nonattainment'' or 
``interfere with maintenance'' of the NAAQS in a downwind state, terms 
that the Supreme Court has found to be ambiguous. See EME Homer City, 
134 S. Ct. 1584. The EPA has always considered cost under the good 
neighbor provision as part of a multifactor analysis based on the facts 
and circumstances of the air quality problem at the time of each 
evaluation, but the EPA has never set upwind control obligations based 
solely on the level of controls imposed for purposes of RACT in 
downwind nonattainment areas, as the petition suggests the EPA do here. 
The EPA believes that such a multifactor analysis that considers 
relevant cost and air quality factors is important for any evaluation 
of a CAA section 126(b) petition regarding interstate transport of 
ozone (a regional pollutant with contribution from a variety of 
sources), as the EPA reviews whether the particular sources identified 
in the petition should be controlled in light of the costs and 
collective impact of emissions on air quality in the area, including 
emissions from other anthropogenic sources. The petition fails to 
conduct any comparable analysis. Review of the named sources in New 
York's petition provides a starting point for such an analysis but does 
not complete the analysis or even provide the type of data that would 
be necessary for the EPA to conduct such an analysis to determine 
whether the named sources emit or would emit in violation of the good 
neighbor provision.
    The petition also suggests that upwind sources should be subject to 
a comparable level of control as sources

[[Page 22804]]

in downwind states, in part, because it asserts that, while the CSAPR 
program provides the legal and technical basis for states to eliminate 
their significant contributions to excessive ozone pollution, the EPA 
has failed to implement a full, federal-level remedy to completely 
address the issue of transported ozone. Instead the EPA issued EGU 
NOX ozone season emissions budgets as a partial remedy for 
interstate transport for the 2008 ozone NAAQS. The petition asserts 
that, according to the analyses in the CSAPR Update, after application 
of the rule's NOX budgets, the EPA's modeling still 
projected multiple remaining nonattainment and maintenance receptors in 
the NYMA, including monitoring sites in Fairfield and New Haven 
Counties in the Connecticut portion of the area, which would continue 
to project nonattainment in 2017.
    While the EPA acknowledged in the CSAPR Update that the FIPs may 
only be a partial remedy for interstate transport for the 2008 ozone 
NAAQS, the EPA subsequently promulgated the Determination Rule, in 
which the EPA concluded that the existing CSAPR Update fully addresses 
the interstate transport obligations under CAA section 
110(a)(2)(D)(i)(I) for the 2008 ozone NAAQS for certain states, 
including eight of the states named in New York's petition (Illinois, 
Indiana, Maryland, Michigan, Ohio, Pennsylvania, Virginia and West 
Virginia), because the downwind air quality problems projected in 2017 
would be resolved in 2023. 83 FR 65878 (December 21, 2018). The EPA 
also approved a SIP from Kentucky which similarly determined that the 
CSAPR Update FIP would fully satisfy the state's good neighbor 
obligation with respect to the 2008 ozone NAAQS (83 FR 33730). 
Together, the EPA found that these actions fully address the good 
neighbor requirements with respect to the 2008 ozone NAAQS for the 
states named in the petition. For the reasons explained in this 
section, the petition has failed to demonstrate that it is necessary to 
implement additional, source-specific, unit-level emissions limits at 
any of the sources named in the petition to ensure reductions are being 
achieved under the CSAPR Update.
    As discussed earlier, the EPA interprets CAA section 126(b) as 
placing the burden on the petitioner to demonstrate in the first 
instance that a finding under the provision is justified. The breadth 
of New York's petition demonstrates why the EPA's interpretation is 
particularly reasonable. The petition names over 350 sources from 
several different source sectors (both EGUs and non-EGUs) in nine 
different upwind states and asked the EPA to evaluate and implement 
source-specific emissions limits for each source. While the EPA has air 
quality modeling information relevant to the step 1 and 2 analyses 
discussed earlier, this analysis was conducted for separate rulemaking 
actions and not solely for use in evaluating this petition. The EPA has 
not already conducted the type of multifactor analysis that would 
normally be used in step 3 to determine whether such a large group of 
upwind sources emits or would emit in violation of the good neighbor 
provision. The EPA also does not currently have information available 
to independently conduct such an analysis, especially for such a 
variety of sources. As noted in the Determination Rule (81 FR 65878), 
the EPA lacks the relevant data to conduct such an analysis for the 
multiple non-EGU source categories, including those referred to in this 
petition. Collecting the relevant data and conducting such an analysis 
independently would require the EPA to invest significant time and 
resources. As the EPA noted in Section IV.B, the 60-day deadline 
provided by Congress for action under CAA section 126(b) is evidence 
that Congress did not intend for the EPA to be required to conduct such 
detailed independent analyses before acting on the petitions, 
especially where a petition addresses a large number and variety of 
sources and seeks tailored unit-level remedies, as New York's petition 
does. While the EPA acknowledges that this task may also be resource-
and time-intensive for a petitioner, the EPA nonetheless interprets the 
timeframe imposed on the EPA in CAA section 126(b) (along with the 
potentially severe consequences under CAA section 126(c) if a finding 
is made) as evidence that the burden is on the petitioner in the first 
instance to demonstrate that the statutory threshold has been met. For 
the reasons discussed in this section, the petition does not provide 
the EPA with a sufficient basis to conclude at step 3 that sources in 
the named states will significantly contribute to nonattainment or 
interfere with maintenance in New York with respect to either the 2008 
or 2015 ozone NAAQS. Therefore, on this basis, the EPA is proposing to 
deny New York's petition as to all named sources because, in addition 
to the specific failures described above for steps 1 and 2, the state 
has also failed to meet its burden to demonstrate at step 3 that the 
sources emit or would emit in violation of the good neighbor provision.

V. Conclusion

    Based on the information discussed in this notice, the EPA is 
proposing to deny New York's CAA section 126(b) petition. The EPA has 
described several technical deficiencies with the petition and, 
therefore, proposes to deny on the basis that New York has not met its 
burden to demonstrate that the named sources emit or would emit in 
violation of the good neighbor provision with respect to the 2008 ozone 
NAAQS or the 2015 ozone NAAQS. For Chautauqua County, the petition does 
not provide sufficient information to indicate that there will be a 
downwind air quality problem (either nonattainment or maintenance) with 
respect to either the 2008 or the 2015 ozone NAAQS. For the NYMA, with 
respect to the 2008 ozone NAAQS, the petition does not provide 
sufficient information to indicate that the NYMA should be considered a 
nonattainment or maintenance receptor pursuant to the good neighbor 
provision. Furthermore, the EPA's own independent analysis of available 
information indicates that there is not currently nor is there 
projected to be an air quality problem with respect to either NAAQS in 
Chautauqua County, and that there is not projected to be any further 
air quality problem with respect to the 2008 ozone NAAQS in the NYMA. 
As an additional independent basis for the proposed denial, even if the 
EPA assumed that the named upwind states were linked to downwind air 
quality problems in New York at steps 1 and 2 of its interstate 
transport framework, material elements in the petition's step 3 
analysis are insufficient, such that the EPA cannot conclude that any 
named source or group of sources in any of the named states will 
significantly contribute to nonattainment or interfere with maintenance 
in any area in New York with respect to either NAAQS. The EPA requests 
comment on its proposed denial of New York's CAA section 126(b) 
petitions, including the bases for the decision described herein.

VI. Judicial Review

    Section 307(b)(1) of the CAA indicates which Federal Courts of 
Appeal have venue for petitions of review of final actions by the EPA. 
This section provides, in part, that petitions for review must be filed 
in the Court of Appeals for the District of Columbia Circuit if: (i) 
The agency action consists of ``nationally applicable regulations 
promulgated, or final action taken, by the Administrator;'' or (ii) 
such action is locally or regionally applicable, but ``such action is 
based on a

[[Page 22805]]

determination of nationwide scope or effect and if in taking such 
action the Administrator finds and publishes that such action is based 
on such a determination.''
    To the extent a court finds this action to be locally or regionally 
applicable, the EPA proposes to find that this action is based on a 
determination of ``nationwide scope or effect'' within the meaning of 
CAA section 307(b)(1). This action addresses emissions impacts from 
sources located in nine states, which are located in multiple EPA 
Regions and federal circuits. The proposed action is also based on a 
common core of factual findings and analyses concerning the transport 
of pollutants between the different states.
    For these reasons, to the extent a court finds this action to be 
locally or regionally applicable, the Administrator proposes to 
determine that any final action related to this proposal is based on a 
determination of nationwide scope or effect for purposes of section 
307(b)(1) of the CAA. Thus, pursuant to CAA section 307(b), any 
petitions for review of any final action related to this proposal must 
be filed in the Court of Appeals for the District of Columbia Circuit 
within 60 days from the date such final action is published in the 
Federal Register.

VII. Statutory Authority

    42 U.S.C. 7410, 7426, 7601.

    Dated: May 6, 2019.
Andrew R. Wheeler,
Administrator.
[FR Doc. 2019-09928 Filed 5-17-19; 8:45 am]
BILLING CODE 6560-50-P


