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ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 52, 78, and 97 [EPA - HQ - OAR - 2015 - 0500 ; FRL - 9935 - 25 - OAR ] RIN 2060 - AS05
Cross - State Air Pollution Rule Update for the 2008 Ozone NAAQS AGENCY: Environmental Protection Agency (EPA)
. ACTION: Proposed r ule
.

________________________________________________________________ SUMMARY: The primary purpose of this proposal is to address interstate air quality impacts with respect to the 2008 ozone National Ambient Air Quality Standards (NAAQS). The EPA promulgated the Cross

- State Air Pollution Rule (CSAPR) on July 6, 2011, to address inte rstate transport of ozone pollution under the 1997 ozone NAAQS and fine particulate matter (PM 2.5 ) under the 1997 and 2006 PM 2.5 NAAQS . The EPA is proposing to update CSAPR to address interstate emission transport with respect to the 2008 ozone NAAQS . This proposal also responds to the July 28, 2015 remand by the Court of Appeals for the District of Columbia Circuit of certain states’ ozone - season nitrogen oxides (NO X ) emissions budgets established by CSAPR.
T his proposal also updates the status of cert ain states’ outstanding interstate ozone transport obligations with respect to the 1997 ozone NAAQS, for which CSAPR provided a partial2

remedy
. The EPA is taking this action under Clean Air Act section 110(a)(2)(D)(i)(I), sometimes called the “good neighbo r provision.” This proposal finds that ozone season emissions of NO X in 23
eastern states affect the ability of downwind states to attain and maintain the 2008 ozone NAAQS. These emissions can be transported downwind as NO X or, after transformation in the atmosphere, as ozone. For these 23 eastern states, the EPA
proposes to issue Federal Implementation Plans (FIPs) that generally update the existing CSAPR NO X ozone - season emission s budgets for electricity generating units ( EGUs) and implement these budgets via the CSAPR NO X ozone - season allowance trading
program . One state, Kansas, would have a new CSAPR ozone season requirement under this proposal. The remaining 22 states were included in the original CSAPR ozone

- season pro gram as to the 1997 ozone NAAQS. The EPA would finalize a FIP for any state that does not have an approved SIP addressing its contribution by the date this rule is finalized. The EPA is proposing implement ation starting with the 2017 ozone season . The proposed
NO X emission reductions do not necessarily eliminate fully states’ significant contribution to downwind air quality problems . However, the proposed emission reductions would provide a partial remedy to address these obligations and would result in important near

- term reductions in ozone pollution that3

crosses state lines, thereby improving air quality impacts in downwind states . I n conjunction with o ther federal and state actions, the se requirements would assist downwind states in the eastern United States in attain ing and maintain ing the 2008 ozone standard
. DATES: Comments must be received on or before [insert date 45 days after publication in the Federal Register]. Under the Paperwork Reduction Act (PRA), comments on the information collection provisions are best assured of consideration if the Office of Management and Budget (OMB) receives a copy of your
comments on or before [ insert date 30 days after date of publ ication in the Federal Register]
. Public h earing . The EPA will be holding one public hearing on the proposed Cross

- State Air Pollution Rule Update for the 2008 Ozone National Ambient Air Quality Standards. The hearing will be held to accept oral comments o n the proposal. The hearing will be held on December 17, 2015 in Washington D.C. The hearing will begin at 9:00 a.m. EST and will conclude at 8:00 p.m. EST
. Additional information for t his public hearing is available in a separate Federal Register notice a nd at http://www2.epa.gov/airmarkets/proposed

- cross - state

- air

pollution

- update

- rule
. ADDRESSES: Submit your comments, identified by Docket ID No.
EPA

- HQ

- OAR

- 2015

- 0500 , to the Federal eRulemaking Portal:4

http://www.regulations.gov . Follow the online instructions for submitting comments. Once submitted, comments cannot be edited or withdrawn. 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 acco mpanied by a written comment. The written comment is considered the official comment and should include discussion of all points you wish to make. The EPA will generally not consider comments or comment contents located outside of the primary submission ( i.e. on the web, cloud, or other file sharing system). For additional submission methods, the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit http://www2.epa.gov/dockets/commenting

- epa - dockets
. FOR FURTHER INFORMATION CONTACT: Mr. David Risley, Clean Air Markets Division, Office of Atmospheric Programs (Mail Code 6204M), Environmental Protection Agency, 1200 Pennsylvania Avenue NW, Washington, DC 20460; telephone number: (202) 343

- 9177; email address: Risley.David@epa.gov. SUPPLEMENTARY INFORMATION:5

Preamble Glossary of Terms and Abbreviations The following are abbreviations of terms used in the preamble.
CAA or Act Clean Air Act
C AIR Clean Air Interstate Rule
CAMx Comprehensive Air Quality Model with Extensions
CBI Confidential Business Information
CEMS Continuous Emission Monitoring Systems
CFR Code of Federal Regulations
CSAPR Cross

- State Air Pollution Rule
EGU Electric Generating Unit
EPA U.S. Environmental Protection Agency
FIP Federal Implementation Plan
FR Federal Register GWh Gigawatt hours
ICR Information Collection Request
IPM Integrated Planning Model
Km Kilome ter lb/mmBtu Pounds per Million British Thermal Unit
LNB Low

- NO x Burners
mmBtu Pounds per Million British Thermal Unit
MOVES Motor Vehicle Emission Simulator NAAQS National Ambient Air Quality Standard
NBP NO X Budget Trading Program6

NEI National Emission Inventory
NO X Nitrogen Oxides
NODA Notice of Data Availability
NSPS New Source Performance Standard
OFA Overfire Air
PM 2.5 Fine Particulate Matter
PPB Parts Per Billion
RIA Regulatory Impact Analysis
SC

- CO 2 Social Cost of Carbon
SCR Selective Catalytic Reduction
SIP State Implementation Plan
SMOKE Sparse Matrix Operator Kernel Emissions
SNCR Selective Non

- catalytic Reduction
SO 2 Sulfur Dioxide
TSD Technical Support Document

Table of Contents
I. Executive Summary A. Purpose o f Regulatory Action B. Major Provisions C. Benefits and Costs II. General Information A. To Whom Does the Proposed Action Apply
III. Air Quality Issues Addressed and Overall Approach for the Proposed Rule A. The Interstate Transport Challenge under the 2008 Ozone Standard7 1. Background on the Overall Nature of the Interstate Ozone Transport Problem 2. Events Affecting Application of the Good Neighbor Provision for the 2008 Ozone NAAQS B. Proposed Approach to Address Ozone Transport under the 2008 Ozone NAAQS via FI PS 1. The CSAPR Framework 2. Partial v ersus Full Resolution of Transport Obligation 3. Why We Focus on Eastern States 4. Short

- Term NO X Emissions C. Responding to the Remand of CSAPR NO X Ozone

- Season Emissions Budgets D. Addressing the Status of Outstanding Transport Obligations for the 1997 Ozone NAAQS IV. Legal Authority A. EPA’s Authority for the Proposed Rule 1. Statutory Authority 2. FIP Authority for Each State Covered by the Proposed Rule V. Analyzing Downwind Air Quality and Upwind

- State Contributions A. Overview of Air Quality Modeling Platform B. Emission Inventories 1. Foundation Emission Inventory Data Sets 2. Development of Emission Inventories for EGUs 3. Development of Emission Inventories for Non

- EGU Point Sources 4. Development of Emission Inventories for Onroad Mobile Sources 5. Development of Emission Inventories for Commercial Marine Category 3 (Vessel) 6. Development of Emission Inventories for Other Nonroad Mobile Sources 7. Development of Emission Inventories for Nonpoint Sources C. Air Quality Modeling to Identify No nattainment and Maintenance Receptors D. Pollutant Transport from Upwind States 1. Air Quality Modeling to Quantify Upwind State Contributions 2. Application of Screening Threshold VI. Quantifying Upwind

- State EGU NO X Reduction Potential to Reduce Interstate Ozone Tran sport for the 2008 NAAQS8 A. Introduction B. NO X Mitigation Strategies 1. EGU NO X Mitigation Strategies 2. Non

- EGU NO X Mitigation Strategies C. Uniform EGU Cost T hresholds for Assessment D. Assessing Cost, EGU NO X Reductions, and Air Quality E. Quantifying State Emissions B udget s VII. Implementation Using the Existing CSAPR Ozone

- Season Allowance Trading Program and Relationship to Other Rules A. Background B. FIP Requirements and Key Elements of the CSAPR Trading Programs 1. Applicability 2. State Budgets 3. Allocations of Emission Allowances 4. Variability Limits, Assurance Levels, and Penalties 5. Implementation Approaches for Transitioning the Existing CSAPR NO X Ozone

- season Program to Address Transport for a Newer NAAQS 6. Compliance Deadlines 7. Monitoring and Reporting and the Allowance Management System 8. Recordation of Allowances C. Submitting a SIP 1. 2018 SIP O ption 2. 2019 and B eyond SIP O ption 3. SIP R evisions that D o N ot U se T he CSAPR T rading P rogram 4. Submitting a SIP to P articipate in CSAPR for S tates not I ncluded in this P roposal D. Title V Permitting E. Relationship to Other Emission Trading and Ozone Transport Programs 1. Interactions with Existing CSAPR Annual Programs, Title IV Acid Rain Program, NO X SIP Call, 176A Petition, and Other State Implementation Plans 2. Other Federal Rulemakings VIII. Costs, Benefits, and Other Impacts of the Proposed Rule IX. Summary of Proposed Changes to the Regulatory Text for the CSAPR FIPs and CSAPR Trading Program X. Statutory and Executive Order Reviews9 A. Executive Order 12866: Regulatory Planning and Review and Executive Order 1356 3: Improving Regulation and Regulatory Review
B. Paperwork Reduction Act (PRA)
C. Regulatory Flexibility Act (RFA)
D. Unfunded Mandates Reform Act (UMRA)
E. Executive Order 13132: Federalism
F. Executive Order 13175: Consultation and Coordination with Indian Tribal Governments
G. Executive Order 13045: Protection of Children from Environmental Health Risks and Safety Risks
H. Executive Order 13211: Actions Concerning Regulations That Significantly Affect Energy Supply, Distribution or
Use

I. National Technology Transfer and Advancement Act (NTTAA)
J. Executive Order 12898: Federal Actions to Address Environmental Justice in Minority Populations and Low

Income Populations K. Determinations Under Section 307(b)(1) a nd (d)

I. Executive Summary10

The EPA promulgated the original Cross

- State Air Pollution Rule (CSAPR) on July 6, 2011, to address interstate ozone transport under the 1997 ozone National Ambient Air Quality Standards (NAAQS). The EPA is proposing to update CSAPR to address interstate e mission transport with respect to the 2008 ozone NAAQS. The 2008 ozone NAAQS is an 8

- hour standard that was set at 75 parts per billion (ppb). See 73 FR 16436 (March 27, 2008).
A. Purpose of Regulatory Action The purpose of this rule is to reduce interstate emission transport that significantly contributes to nonattainment, or interferes with maintenance, of the 2008 ozone NAAQS in the eastern U.S. To achieve this goal, this proposal would further limit ozone season (May 1 through September 30) NO X emissions from electric generating units (EGUs) in 23 eastern states. Ozone causes a variety of negative effects on human health, vegetation, and ecosystems. In humans, acute and chronic exposure to ozone is associated with premature mortality and a number of morbid ity effects, such as asthma exacerbation. Ozone exposure can also negatively impact ecosystems. Studies have established that ozone occurs on a regional scale (i.e., thousands of kilometers) over much of the eastern U.S., with elevated concentrations occur ring in rural as well as metropolitan areas. To reduce this regional

- scale ozone11

transport, assessments of ozone control approaches have concluded that NO X control strategies are most effective. Further, studies have found that EGU NO X emission reductions can be effective in reducing individual 8

- hour peak ozone concentrations and in reducing 8

- hour peak ozone concentrations averaged across the ozone season. 1 Specifically, studies indicate that EGUs’ emissions, which are generally released higher in the air column through tall stacks and are significant in quantity, may disproportionately contribute to long

- range transport of ozone pollution on a per

- ton basis. 2 Clean Air Act (CAA or the Act) section 110(a)(2)(D)(i)(I), sometimes called the “good neighbor pr ovision,” requires states 3 to prohibit emissions that will contribute significantly to nonattainment in, or interfere with maintenance by, any other state with respect to any primary or secondary NAAQS. The EPA originally finalized CSAPR on July 6, 2011. See 76 FR 48208 (July 6, 2011). CSAPR addresses the 1997 ozone NAAQS and the 1997 and 2006 fine particulate matter (PM 2.5 ) NAAQS. 4 (See

1 Summertime Zero

- Out Contributions of regional NO X and VOC emissions to modeled 8

- hour ozone concentrations in the Washington, DC; Philadelphia, PA, and New York City MSAs. “Contributions of regional air pollutant emissions to ozone and fine particulate matter

- related mortalities in eastern U.S. urban are as”. 2 Butler, et al., “Response of Ozone and Nitrate to Stationary Source Reductions in the Eastern USA” 3 The term “state” has the same meaning as provided in CAA section 302(d) which specifically includes the District of Columbia. 4 CSAPR did not evalua te the 2008 ozone standard because the 2008 ozone NAAQS was under reconsideration during the analytic work for the rule.12

section IV for a discussion of CSAPR litigation and implementation.) CSAPR provides a 4

- step process to address the requ irements of the good neighbor provision for ozone or PM 2.5 standards: (1) identifying downwind receptors that are expected to have problems attaining or maintaining clean air standards (i.e., NAAQS); (2) determining which upwind states contribute to these identified problems in amounts sufficient to “link” them to the downwind air quality problems; (3) for states linked to downwind air quality problems, identifying upwind emissions that significantly contribute to downwind nonattainment or interfere with do wnwind maintenance of a standard by quantifying available upwind emission reductions and apportioning upwind responsibility among linked states; and (4) for states that are found to have emissions that significantly contribute to nonattainment or interfere with maintenance of the NAAQS downwind, reducing the identified upwind emissions via regional emissions allowance trading programs. Each time the ozone or
PM 2.5 NAAQS are revised, this process can be applied for the new NAAQS. In this action, the EPA prop oses to apply this 4

- step process to update CSAPR with respect to the 2008 ozone NAAQS. Application of this process with respect to the 2008 ozone NAAQS provides the analytic basis for proposing to further limit

ozone season EGU NO X emissions in 23 easter n states. However, the13

EPA seeks comment on this proposal from all states and stakeholders. The requirements of this proposal are in addition to existing, on

- the

- books EPA and state environmental regulations, including the Clean Power Plan (CPP), which is included in the base case for this proposal. On August 3, 2015, President Obama and EPA announced the Clean Power Plan

– a historic and important action on emissions that contribute to climate change. The CPP reduces carbon pollution from the power sector. Due to the compliance timeframes of the CPP, the EPA does not anticipate significant interactions with the CPP and the near

term ozone season EGU NO X emission reduction requirements under this proposal. However, states and utilities will be able to make t heir compliance plans with both programs in mind. Further discussion of the CPP is provided later in this proposal. In addition to reducing interstate ozone transport with respect to the 2008 ozone NAAQS, this proposal also addresses the status of outstand ing interstate ozone transport obligations with respect to the 1997 ozone NAAQS. Under CSAPR, the EPA promulgated FIPs for 25 states to address ozone transport under the 1997 NAAQS. For 11 of these states, 5 in the 2011 final rule,

5 Alabama, Arkansas, Georgia, Illinois, Indiana, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, and Texas. (See CSAPR Final R ule, 76 FR at 48220, and the CSAPR Supplemental Rule, 76 FR at 80760 , December 27, 2011)
.14

CSAPR quantified ozone season NO X emission reductions that were not necessarily sufficient to eliminate all significant contribution to downwind nonattainment or interference with downwind maintenance of the 1997 ozone NAAQS downwind. Relying on base case modeling completed for this proposed rulemaking, this action proposes to find that the reductions required by those 11 FIPs were in fact sufficient to eliminate such significant contributions to downwind air quality problems for that standard. This action also responds to the Ju ly 28, 2015 opinion of the Court of Appeals for the District of Columbia (D.C. Circuit) remanding without vacatur 11 states’ CSAPR phase 2 NO X ozone season emissions budgets. EME Homer City Generation, L.P. , v.
EPA , No. 795 F.3d 118, 129

- 30, 138 ( EME Homer City II ). This action proposes to respond to that remand by replacing the budgets invalidated by the D.C. Circuit for nine states and by removing two states from the CSAPR NO X ozone - season trading
program. 6
On October 1, 2015 , the EPA strengthen ed the gr ound

- level ozone NAAQS, based on extensive scientific evidence about ozone’s effects on public health and welfare. This proposal to

6 The EPA proposes to replace emissions budgets for Maryland, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tex as, Virginia, and West Virginia. The EPA proposes to remove Florida and South Carolina from the CSAPR ozone

season NO X trading program.15

reduce interstate emission transport with respect to the 2008 ozone NAAQS is a separate and distinct regulatory action and i s not meant to address the CAA’s good neighbor provision with respect to the 2015 ozone NAAQS final rule. The Clean Air Act gives states the responsibility to address interstate pollution transport through good neighbor State Implementation Plans (SIPs). T he EPA supports state efforts to submit good neighbor SIPs for the 2008 ozone NAAQS and has shared information with states to facilitate such SIP submittals. However, in the event that good neighbor SIPs are not submitted or cannot be approved, this rule p roposes Federal Implementation Plans (FIPs), as required under section 110(c)(1) of the CAA, to establish and implement EGU NO X reductions identified in this rule. On July 13, 2015, the EPA published a rule finding that 24
states 7 failed to make complete submissions that address the requirements of section 110(a)(2)(D)(i)(I) related to the interstate transport of pollution as to the 2008 ozone NAAQS. See 80 FR 39961 (July 13, 2015) (effective August 12, 2015). The finding action triggered a 2

- year deadline for the EPA to issue

7 The states included in this finding of failure to submit are: Alabama, Arkansas, California, Florida, Georgia, Iowa, Illinois, Kansas, Massachusetts, Maine, Mi chigan, Minnesota, Mississippi, Missouri, New Hampshire, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Vermont, Virginia, and West Virginia.16

FIPs to address the good neighbor provision for these states by August 12, 2017. The EPA would finalize a FIP for a state that we find has failed to submit a complete good neighbor SIP or for which we issue a final rule disapproving its good neighbor SIP. The EPA proposes to align implementation of this rule with relevant attainment dates for the 2008 ozone NAAQS, as required by the D.C. Ci rcuit’s decision North Carolina v. EPA. 8 The EPA’s final 2008 Ozone NAAQS SIP Requirements Rule 9 revised the attainment deadline for ozone nonattainment areas currently designated as moderate from December 2018 to July 2018 in accordance with the D.C. Circ uit’s decision in NRDC v. EPA . 10 Because July 2018 falls during the 2018 ozone season, the 2017 ozone season will be the last full season from which data can be used to determine attainment of the NAAQS by the July 2018 attainment date. We believe that Nort h Carolina compels the EPA to identify upwind reductions and implementation programs to achieve these reductions, to the extent possible, for the 2017

ozone season. In order to apply the first and second steps of the CSAPR
4

- step process to interstate transport for the 2008 ozone NAAQS,

8 531 F.3d 896, 911

- 12 (D.C. Cir. 2008) (holding that EPA must coordinate intersta te transport compliance deadlines with downwind attainment deadlines). 9 80 FR 12264, 12268; 40 CFR 51.1103. 10 777 F.3d 456, 469 (D.C. Cir. 2014).17

the EPA used air quality modeling to project ozone concentrations at air quality monitoring sites to 2017. The EPA evaluated these mo deling projections for the air quality monitoring sites and considered current ozone monitoring data at these sites to identify receptors that are anticipated to have problems attaining or maintaining the 2008 ozone NAAQS. The EPA then used air quality mod eling to evaluate contributions from upwind states to these downwind receptors. CSAPR and previous federal transport rules, such as the NO X SIP Call and the Clean Air Interstate Rule (CAIR)

– discussed in detail below

- addressed collective contributions o f ozone pollution from states in the eastern U.S. These rules did not address contributions in the 11 western contiguous United
States. 11 There may be additional criteria to evaluate regarding collective contribution of transported air pollution in the
West , such as those raised in EPA

- state meetings to discuss approaches for determining how emissions in upwind states impact air quality in downwind states
. 12 Given that the near

- term 2017 implementation timeframe constrains the opportunity to conduct evaluations of additional criteria, the EPA proposes to focus

11 For the purpose of this action, the western U.S. (or the West) consists of the 11 western contiguous states of Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington, and Wyoming. 12 For example, EPA

- State meetings held in Research Triangle Park, NC on April 8, 2013 and Denver, Colorado on April 17, 2013.18

this rulemaking on eastern states. This focus would not relieve western states of obligations to add ress interstate transport under the Act. The EPA and western states, working together,

w ould continue to evaluate interstate transport on a case

- by

case basis. While the EPA proposes to focus this rulemaking on eastern states, we seek comment on whether to include western states in this rule
. To apply the third step of the 4

- step process, the EPA assessed ozone season NO X reductions that are achievable for the 2017 ozone season. This assessment reveals that there is significant EGU NO X reduction potential t hat can be achieved for 2017 at reasonable cost, which would make meaningful and timely improvements in ozone air quality. The EPA applied a multi

factor test to evaluate EGU NO X reduction potential for 2017 and proposes to quantify EGU NO X ozone - season em issions budgets reflecting emission reductions from cost

- effective pollution control measures achievable for the 2017 ozone season (estimated to obtain NO X reductions at a uniform cost of approximately $1,300 per ton). The EPA is not proposing to quantify non - EGU emission reductions to reduce interstate ozone transport for the 2008 ozone NAAQS at this time because we are uncertain that significant NO X mitigation is achievable from non

- EGUs for the 2017 ozone season. The EPA will continue to evaluate whether19

non - EGU emission reductions can be achieved on a longer time

frame at a future date. However, as explained later in this notice, this proposal seeks comment on a preliminary evaluation of stationary non

- EGU NO X mitigation potential and on allowing a
state to include legacy NO X SIP Call non

- EGUs in the CSAPR trading program by adopting a SIP revision that the EPA would approve as modifying the CSAPR trading program provisions with regard to that state. To evaluate full elimination of a state’s significant contribution to nonattainment and interference with maintenance, EGU and non

- EGU ozone season NO X reductions should both be evaluated. To the extent air quality impacts persist after implementation of the NO X reductions identified in this rule, a final jud gment on whether the proposed EGU NO X reductions represent a full or partial elimination of a state’s good neighbor obligation for the 2008 NAAQS is therefore subject to an evaluation of the contribution to interstate transport from additional non

- EGU emis sion sectors. However, the EPA believes that it is beneficial to implement, without further delay, EGU NO X reductions since they are achievable in the near term. Generally, notwithstanding that additional reductions may be required to fully address the
st ates’ interstate transport obligations, the proposed NO X emission reductions are needed for these states to eliminate20

their significant contribution to nonattainment and interference with maintenance of the 2008 ozone NAAQS and needed for downwind
states w ith ozone nonattainment areas that are required to attain the standard by 2018. 13 At the same time, the EPA also notes that section 110(a)(2)(D)(i)(I) of the CAA only requires upwind states to prohibit emissions that will significantly contribute to
nonatt ainment or interfere with maintenance of the NAAQS in other states. It does not shift to upwind states the full responsibility for ensuring that all areas in other states attain and maintain the NAAQS. Downwind states also have control responsibilities bec ause, among other things, the Act requires each state to adopt enforceable plans to attain and maintain air quality standards. The requirements established for upwind states through this proposed rule will supplement downwind states’ local emission control strategies that, in conjunction with the certainty on maximum allowable upwind state EGU emissions that this proposed rule would provide, promote attainment and maintenance of the 2008 ozone NAAQS. To meet the fourth step of the 4

- step process (i.e., impl ementation) the proposed FIPs contain enforceable measures necessary to achieve the emission reductions in each state. The

13 The proposed requi rements for one state, North Carolina, would fully eliminate that state’s significant contribution to downwind air quality problems.21

proposed FIPs would require power plants in affected states (i.e., states that significantly contribute to ozone transport in the eas t) to participate in the CSAPR NO X ozone - season allowance trading program (as modified by the proposed changes described elsewhere in this notice). CSAPR’s trading programs and EPA’s prior emissions trading programs provide a proven implementation framewor k for achieving emission reductions. In addition to providing environmental certainty (i.e., a cap on emissions), these programs also provide regulated sources with flexibility in choosing compliance strategies. By using the existing CSAPR NO X ozone - season allowance trading program, the EPA is proposing to use an implementation framework that was shaped by notice and comment in previous rulemakings and reflects the evolution of these programs in response to court decisions. Further, this program is familiar to the EGUs that will be regulated under this rule, which means that monitoring, reporting, and compliance will be done as it already is under CSAPR’s current ozone - season and annual programs. 14 These FIP requirements, if finalized, would begin with the 2017 ozone season and would continue for subsequent ozone seasons to ensure that upwind states included in this rule meet

14 One state, Kansas, would have a new CSAPR ozone season requirement under this proposal . Kansas currently participates in the CSAPR NO X and SO 2 annual programs . The remaining 22 states were included in the original CSAPR ozone

season program as to the 1997 ozone NAAQS.22

their Clean Air Act obligation to address interstate emissions transport with respect to the 2008 ozone NAAQS for 2017 and future year s. To the extent that emissions in an included state would otherwise exceed the promulgated emission level, these good neighbor EGU emissions limits will ensure that future emissions are consistent with states’ ongoing good neighbor obligations. To the ext ent that emissions in an included state would be reduced for other reasons, for example planned lower

- NO X emitting generation coming online, then those actions will help the state comply with its good neighbor requirements. Generally, for states that would be affected by one of the FIPs proposed in this action and that are already included in the CSAPR NO X ozone - season trading program to address interstate ozone transport for the 1997 NAAQS, this action proposes to revise the existing part 97 regulations th at define that program to incorporate lower EGU NO X ozone - season emissions budget s for each of the affected states in order to reduce ozone transport for the 2008 ozone NAAQS. 15 If finalized, compliance with these lower emissions budget s for the 2008 ozone NAAQS would also satisfy compliance with the existing higher emissions budget s for the 1997 ozone NAAQS. Therefore, the EPA proposes to replace the existing CSAPR emissions budgets (i.e. for the 1997 ozone

15 One state, Kansas, would have a new CSAPR ozone season requirement under this proposal. The remaining 22 s tates were included in the original CSAPR ozone - season program as to the 1997 ozone NAAQS.23

NAAQS) for the affected state s with the lower emissions budgets proposed to reduce ozone transport for the 2008 ozone NAAQS. Compliance with the final lower emissions budget s for the 2008 ozone NAAQS would supersede compliance with the CSAPR NO X ozone season budgets for the 1997 ozone NAAQS. This action would therefore respond to the remand of EME Homer City II with respect to the NO X ozone - season emissions budgets for nine
states 16 by replacing the budgets declared invalid by the court with revised budgets designed to address the 2008 ozone NAAQS. The proposed FIPs, if finalized, would not limit states’ flexibility in meeting their CAA requirements, as any state included in this rule can submit a good neighbor SIP at any time that, if approved by the EPA, could replace the FIP for that state. Additionally, CSAPR already provides states with the option to submit abbreviated SIPs to customize the methodology for allocating NO X ozone - season allowances while participating in the ozone

- season trading program and we propose to continue that

a pproach in this rule. The EPA therefore proposes revisions to the Code of Federal Regulations, specifically 40 CFR part 97, subpart BBBBB (federal
CSAPR NO X ozone - season trading program); 40 CFR 52.38(b) (rules on replacing or modifying the federal CSAPR N O X ozone - season

16 The EPA proposes to replace emissions budgets for Maryland, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tex as, Virginia, and West Virginia.24

trading program with a SIP); 40 CFR 52.540, 52.882, and 52.2140 (adding or limiting requirements for EGUs in certain individual states to participate in the CSAPR NO X ozone - season trading program); and 40 CFR 78.1 (modifying the list of dec isions subject to administrative appeal procedures under part 78) to address interstate transport for the 2008 ozone NAAQS. In addition, various minor corrections are proposed to these CFR sections and other sections of parts 52, 78, and 97 relating to the CSAPR ozone

- season and annual trading programs. The 23 eastern states for which the EPA proposes to promulgate FIPs to reduce interstate ozone transport as to the 2008 ozone NAAQS are listed in Table I

- 1.

Table I - A - 1 Proposed List of Covered States for the 2008 8 - Hour Ozone NAAQS
State Name Alabama Arkansas Illinois Indiana Iowa Kansas Kentucky Louisiana Maryland Michigan Mississippi Missouri New Jersey New York North Carolina25

Ohio Oklahoma Pennsylvania Tennessee Texas Virginia West Virginia Wisconsin

For eastern states for which the EPA is not proposing FIPs in this action, the EPA notes that updates to the modeling for the final rule , made based on comments received on the proposal, could change the analysis as to which states significantly contribute to nonattainment or interfere with maintenance. In this regard, the final modeling could result in additional states being included in the final rule. Therefore, the EPA provides all da ta and methods necessary for all eastern states to comment on all aspects of this proposal in the Ozone Transport Policy Analysis TSD. This information includes EGU NO X

ozone - season emissions budgets for all eastern states, in the
event that final rule mo deling demonstrates that additional states significantly contribute to downwind air quality problems. The EPA notes that the annual PM 2.5 NAAQS was updated after CSAPR was promulgated (78 FR 306, January 15, 2013). However, this rule does not address the 2 012 PM 2.5 standard. The EPA acknowledges that, in EME Homer City II , the D.C. Circuit also26

remanded without vacatur the CSAPR phase 2 SO 2 emissions budgets as to four states. 795 F.3d at 129, 138
. This proposal does not address the remand of these CSAPR phase 2 SO 2 annual emissions budgets. The EPA intends to address the remand of the phase 2 SO 2 annual emissions budgets separately. The existing CSAPR emissions budget s and implementation programs (CSAPR SO 2 annual and NO X annual requirements), whic h address interstate transport for the 1997 and 2006 PM 2.5 NAAQS, continue to apply at this time.
B. Major Provisions The major provision of this action are described in the remainder of this preamble and organized as follows: section III describes the human health and environmental context, the EPA’s overall approach for addressing interstate transport, and the EPA’s response to the remand of certain CSAPR NO X ozone - season emissions budgets; section IV describes the EPA’s legal authority for this action; sect ion V describes the air quality modeling platform and emission inventories that the EPA used to identify downwind receptors of concern and upwind state ozone contributions to those receptors; section VI describes the EPA’s proposed approach to quantify upw ind state obligations in the form of EGU NO X emissions budgets; section VII details the implementation requirements including key elements of the CSAPR allowance trading program and deadlines for compliance; section27

VIII describes the expected costs, benefits, and other impacts of this proposed rule; section IX discusses p roposed changes to the existing regulatory text for the CSAPR FIPs and the CSAPR trading programs; and section X discusses the statutes and executive orders affecting this rulemaking. The EPA invites comment on this proposed rulemaking.
C. Benefits and Costs The proposed rule would achieve near

- term emission reductions from the power sector, lowering ozone season NO X in 2017 by 85,000 tons, compared to baseline 2017 projections without th e rule. Consistent with Executive Order 13563, “Improving Regulation and Regulatory Review,” we have estimated the costs and benefits of the proposed rule. Estimates here are subject to uncertainties discussed further in the Regulatory Impact Analysis (RIA ) in the docket. The estimated net benefits of the proposed rule at a 3 percent discount rate are $ 700 m illion to $ 1. 2 billion (2011$) . The non

- monetized benefits include reduced ecosystem effects and reduced visibility impairment. D iscussion of the costs and benefits of the proposal is provided in preamble section VIII, below, and in the RIA, which is found in the docket for this proposed rulemaking. The EPA’s estimate of
t he proposed rule’s costs and quantified benefits is summarized in Table I.C

- 1, below
.28

Table I.C - 1 Summary of Compliance Costs, Monetized Benefits, and Monetized Net Benefits of the Proposed Rule for 2017 (2011$)

Description Impacts at 3 percent discount rate ($ millions) Annualized Compliance Costs a $93 Monetized benefits b $ 700 to $1,200 Net benefits (benefits

- costs $ 620 to $ 1,200

a Total annualized social costs are estimated at a 3 percent discount rate. The social costs presented here reflect the EGU ozone season costs of complying with the proposed FIPs. b Total monetized benefits are estimated at a 3 percent discount rate. The total monetized benefits reflect the human health benefits associated with reducing exposure to ozone and PM 2.5 . It is important to note that the monetized benefits and co - benefits include many but not all health effects associated with pollution exposure. Benefits are shown as a range reflecting studies from Krewski et al. (2009) with Smith et al. (2009) to Lepeule et al. (2012) with Zanobetti and Schwartz (2008).

II. General Information

A. To Whom Does This Action Apply ? This rule affects EGUs, and regulates the following groups:

Industry Group NAICS* Fossil fuel

- fired electric power generation 221112 *North American Industry Classification System This table is not intended to be exhaustive, but rather provides a guide for readers regarding entities likely to be regulated by this action. This table lists the types of entities that the EPA is now aware could potentially be regulated by this

ac tion. Other types of entities not listed in the table could also be regulated. To determine whether your entity is regulated29

by this action, you should carefully examine the applicability criteria found in 40 CFR 97.504. If you have questions regarding the applicability of this action to a particular entity, consult the person listed in the FOR FURTHER INFORMATION CONTACT section.

III. Air Quality Issues Addressed and Overall Approach for the Proposed Rule A. The Interstate Transport Challenge under the 2008 Ozone Standard. 1. Background on the Overall Nature of the Interstate Ozone Transport Problem Interstate transport of NO X emissions poses significant challenges with respect to the 2008 ozone NAAQS in the eastern U.S. and th us presents a threat to pub lic health and welfare. a. Nature of O zone and the O zone NAAQS Ground

- level ozone is not emitted directly into the air, but is created by chemical reactions between NO X and volatile organic compounds (VOC) in the presence of sunlight. Emissions from elect ric utilities and industrial facilities, motor vehicles, gasoline vapors, and chemical solvents are some of the major sources of NO X and VOC. Because ground

- level ozone formation increases with temperature and sunlight, ozone levels are generally higher30

during the summer. Increased temperature also increases emissions of volatile man

- made and biogenic organics and can indirectly increase NO X emissions as well (e.g., increased electricity generation for air conditioning). The 2008 primary and secondary ozo ne standards are both 75 parts per billion (ppb) as an 8

- hour level. Specifically, the standards require that the 3

- year average of the fourth highest 24

- hour maximum 8

- hour average ozone concentration may not exceed 75 ppb. b. Ozone T ransport Studies hav e established that ozone formation, atmospheric residence, and transport occurs on a regional scale (i.e., thousands of kilometers) over much of the eastern U.S., with elevated concentrations occurring in rural as well as metropolitan areas. While substantial progress has been made in reducing ozone in many urban areas, regiona l

- scale ozone transport is still an important component of peak ozone concentrations during the summer ozone season . The EPA has previously concluded in the NO x SIP Call, CAIR, and CSAPR that, for reducing regional

- scale ozone transport, a
NO X control str ategy would be most effective. NO X emissions can be transported downwind as NO X or, after transformation in the atmosphere, as ozone. As a result of ozone transport, in any given location, ozone pollution levels are impacted by a31

combination of local emiss ions and emissions from upwind sources. The transport of ozone pollution across state borders compounds the difficulty for downwind states in meeting health

based air quality standards (i.e., NAAQS). Recent assessments of ozone, for example those conducte d for the October 2015 Regulatory Impact Analysis of the Final Revisions to the National Ambient Air Quality Standards for Ground

- Level Ozone (EPA

- 452/ R

- 15

- 007 ) continue to show the importance of NO X emissions on ozone transport. This analysis is in the do cket for this proposal and can be also found at the EPA’s website at: http://www3.epa.gov/ozonepollution/pdfs/20151001ria.pdf
. There are five general categories of NO X emission sources: EGUs, non

- EGU point, onroad mobile, non

- road mobile, and area. Studies have found that EGU NO X emission reductions can be effective in reducing individual 8

- hour peak ozone concentrations and in reducing 8

- hour peak ozone concentrations averaged across the ozone season . For example, a study that evaluates the effectiveness on ozone concentrations of EGU NO X reductions achieved under the NO X Budget Trading Program shows that regulating NO X emissions has been highly effective in reducing bo th ozone and dry

- NO 3 concentrations during the ozone

season . Further , this study indicates that EGU emissions, which are generally released higher in the air column through tall32

stacks and are significant in quantity , m a y disproportionately contribute to long

- range transport of ozone pollution on a per

ton basis
. 17 Another study shows that EGU NO X emissions can contribute between 5 ppb and 25 ppb to average 8

- hour peak ozone concentrations in mid

- Atlantic metropolitan statistical areas. 18 Previous regional ozone transport efforts, including the NO X SIP Call, CAIR, and CSAPR, required ozone season NO X reductions from EGUs to address interstate transport of ozone. The EPA has taken comment on regulating EGU NO X emissions to address interstate ozone transport in the notice

- and

- comment process for these rulemakings. The EPA received no significant adverse comments in any of these proposals regarding the rules’ focus on

ozone season EGU NO X reductions to address interstate ozone transport. As described late r in t his notice, the EPA’s analysis finds that the power sector continues to be capable of making NO X reductions at reasonable cost that reduce interstate transport with respect to ground

- level ozone. EGU NO X emission reductions can be made in the near

- term und er this proposal by fully operating existing EGU NO X post

- combustion controls (i.e.,

17 Butler, et al., “Response of Ozone and Nitrate to Stationary Source Reductions in the Eastern USA” 18 Summertime Zero

- Out Contributions of regional NO X and VOC emissions to modeled 8

- hour ozone concentrations in the Washington, DC; Philadelphia, PA, and Ne w York City MSAs. “Contributions of regional air pollutant emissions to ozone and fine particulate matter

- related mortalities in eastern U.S. urban areas”
.33

Selective Catalytic Reduction and Selective Non

- Catalytic Reduction)

– including optimizing NO X removal by existing, operational controls and turning on and optimizing exi sting idled controls; installation of (or upgrading to) state

- of

- the

art NO X combustion controls; and shifting generation to units with lower NO X emission rates. Further, additional assessment reveals that these available EGU NO X reductions would make meaningful and timely improvements in ozone air quality.
T he Clean Air Act's good neighbor provision requires states and the EPA to address interstate transport of air pollution that affects downwind states' ability to attain and mai ntain NAAQS. Other provisions of the CAA , namely sections 179B and 319(b), are available to deal with NAAQS exceedances not attributable to the interstate transport of pollution covered by the good neighbor provisions but caused by emission sources outside the control of a downwind state
. These provisions address international transport and exceptional events, respectively. 19 , 20

19 The EPA recognizes that both in

- state and upwind wildfires may contribute to monitored ozone conc entrations. The EPA encourages all states to consider how the appropriate use of prescribed fire may benefit of public safety and health by resulting in fewer ozone exceedances for both the affected state and their neighboring states. 20 The CAA and the EP A’s implementing regulations, specifically the Exceptional Events Rule at 40 CFR 50.14, allow for the exclusion of air quality monitoring data from regulatory determinations when events, including wildland fires, contribute to NAAQS exceedances or violatio ns if they meet certain requirements, including the criterion that the event be not reasonably controllable or preventable. Wildland fires can be of two types:34

c. Health and E nvironmental E ffects Exposure to ambient ozone causes a variety of negative effects on human health, vegetation, and ecosystems. In humans, acute and chronic exposure to ozone is associated with premature mortality and a number of morbidity effects, such as asthma exacerbation. In ecosystems, ozone exposure causes visible foliar injury, decreases plant growth, and affect s ecosystem community composition. See the EPA’s November 2014 Regulatory Impact Analysis of the Proposed Revisions to the National Ambient Air Quality Standards for Ground

- Level Ozone (EPA

- 452/P

14

- 006) , in the docket for this proposal and available on the EPA’s website at: http://www.epa.gov/ttn/ecas/regdata/RIAs/20141125ria.pdf , for more information on the human health and welfare a nd ecosystem effects associated with ambient ozone exposure.

wildfire (unplanned) and prescribed fire (planned). Under the Exceptional Events Rule, wildfires are considered, by their nature, to be not reasonably controllable or preventable. Because prescribed fires on wildland are intentionally ignited for resource management purposes, to meet the not reasonably controllable or preventable criterion, they must be conducted under a certified Smoke Management Program or employ basic smoke management practices. Both types of wildland fire must also satisfy the other rule criteria. The EPA will soon propose revisions to the Exceptional Events Rule and release a dra ft guidance document, which applies the proposed rule revisions to wildfire events that could influence ozone concentrations. These actions, which the EPA intends to finalize in the summer of 2016, further clarify the treatment of wildland fires under the Exceptional Events Rule.35

2. Events Affecting Application of the Good Neighbor Provision for the 2008 Ozone NAAQS The 2008 revisions to the ozone NAAQS were promulgated on March 12, 2008. See National Ambient Air Quality Sta ndards for Ozone, Final Rule, 73 FR 16436 (March 27, 2008). The revision of the NAAQS, in turn, triggered a 3

- year deadline of March 12, 2011, for states to submit SIP revisions addressing infrastructure requirements under CAA sections 110(a)(1) and 110(a) (2), including the good neighbor provision. During this 3

- year SIP development period, on September 16, 2009, the EPA announced 21 that it would reconsider the 2008 ozone NAAQS. To reduce the workload for states during the interim period of reconsideration, the EPA also announced its intention to propose staying implementation of the 2008 standards for a number of the requirements
. On January 6, 2010, the EPA proposed to revise the 2008 NAAQS for ozone from 75 ppb to a level within the range of 60 to 70 ppb. See 75 FR 2938 (January 19, 2010). The EPA indicated its intent to issue final standards based upon the reconsideration by summer 2011. On July 6, 2011, the EPA finalized CSAPR, in response to the D.C. Circuit’s remand of the EPA’s prior federal transport

21 Fact Sheet. The EPA to reconsider Ozone Pollution Standards. http://www.epa.gov/groundlevelozone/pdfs/O3_Reconsideration_FACT%20SHE ET_091609.pdf36

rule, CAIR. See 76 FR 48208 (July 6, 2011). CSAPR addresses ozone transport under the 1997 ozone NAAQS, but does not address the 2008 ozone standard, because the 2008 ozone NAAQS was under reconsideration during the analytic work for the rule. On Septemb er 2, 2011, consistent with the direction of the President, the Administrator of the Office of Information and Regulatory Affairs of the Office of Management and Budget returned the draft final 2008 ozone rule EPA had developed upon reconsideration to the Agency for further consideration. 22 In view of this direction and the timing of the agency’s ongoing periodic review of the ozone NAAQS required under CAA section 109 (as announced on September 29, 2008), the EPA decided to coordinate further proceedings on its voluntary reconsideration rulemaking of the 2008 ozone standard with that of its ongoing periodic review of the ozone NAAQS
. 23 Implementation for the original 2008 ozone standard was renewed. However, during this time period , a number of legal developments pertaining to the EPA’s promulgation of CSAPR created uncertainty surrounding the EPA’s statutory interpretation and implementation of the good neighbor provision.

22 See Policy Assessment for the Review of the Ozone National Ambient Air Quality Sta ndards, August 2014, http://www.epa.gov/ttn/naaqs/standards/ozone/data/20140829pa.pdf, at 1

- 9. 23 Id.37

On August 21, 2012, the D.C. Circuit issued a decision in
EM E Homer City Generation, L.P. v. EPA addressing several legal challenges to CSAPR and holding, among other things, that states had no obligation to submit good neighbor SIPs until the EPA had first quantified each state’s good neighbor obligation. 24 Accordi ng to that decision, the submission deadline for good neighbor SIPs under the CAA would not necessarily be tied to the promulgation of a new or revised NAAQS. While the EPA disagreed with this interpretation of the statute and sought review of the decision in the D.C. Circuit and the U.S. Supreme Court, the EPA complied with the D.C. Circuit’s ruling during the pendency of its appeal. In particular, the EPA indicated that , consistent with the D.C. Circuit’s opinion, it would not at that time issue findings that states had failed to submit SIPs addressing the good neighbor provision. 25

24 EME Homer City Generation, L.P. v. EPA , 696 F.3d 7, 31 (D.C. Cir. 2012). 25 See, e.g. , Memorandum from the Office of Air and Radiation former Assistant Administrator Gina McCarthy to the EPA Regions, “Next Steps for Pending Redesignation Requests and State Implementation Plan Actions Affected by the Recent Court Decision Vacating the 2011 Cross

State Air Pollution Rule,” November 19, 2012; 78 FR 65559 (November 1, 2013) (final action on Florida infrastructure SIP submission for 2008 8

- hour ozone NAAQS); 78 FR 14450 (March 6, 2013) (final action on Tennessee infrastructure SIP submissions fo r 2008 8

- hour ozone NAAQS); Final Rule, Findings of Failure To Submit a Complete State Implementation Plan for Section 110(a) Pertaining to the 2008 Ozone National Ambient Air Quality Standard, 78 FR 2884 (January 15, 2013).38

On January 23, 2013, the Supreme Court granted the EPA’s petition for certiorari. 26 During 2013 and early 2014, as the EPA awaited a decision from the Supreme Court, the EPA ini tiated efforts and technical analyses aimed at identifying and quantifying state good neighbor obligations for the 2008 ozone NAAQS. As part of this effort, the EPA solicited stakeholder input and also provided states with, and requested input on, emission s inventories for 2011 (78 FR 70935, November 27, 2013) and inventory projections for 2018 (79 FR 2437, January 14, 2014). On April 29, 2014, the Supreme Court revers ed the D.C. Circuit’s EME Homer City opinion on CSAPR and held, among other things, that under the plain language of the CAA, states must submit SIPs addressing the good neighbor provision within 3 years of promulgation of a new or revised NAAQS, regardless of whether the EPA first provides guidance, technical data, or rulemaking to quantify the state’s obligation. 27 Thus, the Supreme Court affirmed that states have an obligation in the first instance to address the good neighbor provision after promulgation of a new or revised NAAQS, a holdin g that also

26 EPA v. EME Homer City Generation, L.P. , 133 S. Ct. 2857 (2013) (granting the EPA’s and other parties’ petitions for certiorari). 27 EPA v. EME Homer City Generation, L.P. , 134 S. Ct. 1584, 1600

- 01 (2014).39

applies to states’ obligation to address transport for the 2008 ozone NAAQS. The Supreme Court holding affirmed that states were required to submit SIPs addressing the good neighbor provision with respect to the 2008 ozone NAAQS by March 12, 2011. To the extent that states have failed to submit SIP s to meet this statutory obligation, then the EPA has not only the authority , but the obligation, to promulgate FIP s to address the CAA requirement. Following the remand of the case to the D.C. Circuit, the EPA requested that the court lift the CSAPR stay and toll the CSAPR compliance deadlines by three years. On October 23, 2014, the D.C. Circuit granted the EPA's request. The EPA issued an interim final rule to revise the regulatory de adlines in CSAPR to reflect the three

- year delay in implementation. Accordingly,
CSAPR p hase 1 implementation began in 2015 and p hase 2 will begin in 2017. 28 On March 6, 2015, the EPA’s final 2008 Ozone NAAQS SIP Requirements Rule 29 revised the attainment deadline for ozone nonattainment areas currently designated as moderate to July 2018 . In order to demonstrate attainment by the deadline, the demonstration would have to be based on design values calculated

28 79 FR 71663 (December 3, 2014). 29 80 FR 12264, 12268 (Mar. 6, 2015); 40 CFR 51.1103.40

using 2015 through 2017 o zone season data, since the July 2018 deadline does not afford a full ozone season of measured data. The EPA established this deadline in the 2015 Ozone SIP Requirements Rule after previously establishing a deadline of December 31, 2018, that was vacated b y the D.C. Circuit Court in Natural Resources Defense Council v. EPA
. 30 On July 28, 2015, the D.C. Circuit issued its opinion regarding CSAPR on remand from the Supreme Court, EME Homer City
II , 795 F.3d 118
. The court largely upheld CSAPR, but remanded
to EPA without vacatur certain states’ emissions budgets for reconsideration. This proposal responds to the remand of certain
CSAPR NO X ozone - season emissions budgets to the EPA for reconsideration ; see section C below. Regarding the remand of CSAPR phase 2 SO 2 annual emissions budgets as to four states , this proposal does not address that particular aspect of the D.C. Circuit opinion. The EPA intends to address the remand of the phase 2 SO 2 annual e missions budgets separately.
B. Proposed Approach to Address Ozone Transport under the 2008 Ozone NAAQS via FIPs 1. The CSAPR F ramework
CSAPR establishe s a 4

- step process to address the requirements of the good neighbor provision
. 31 The EPA proposes

30 777 F.3d 456 (D.C. Cir. 2014). 31 See CSAPR, Final Rule, 76 FR 48208 (August 8, 2011).41

to follow the same steps for this rule with respect to the 2008 ozone NAAQS. These steps are : (1) identifying downwind receptors that are expected to have problems attaining or maintaining clean air standards (i.e., NAAQS); (2) determining which upwind
sta tes contribute to these identified problems in amounts sufficient to “link” them to the downwind air quality problems; (3) for states linked to downwind air quality problems, identifying upwind emissions that significantly contribute to nonattainment or in terfere with maintenance of a standard by quantifying available upwind emission reductions and apportioning upwind responsibility among linked states; and (4) for states that are found to have emissions that significantly contribute to nonattainment or int erfere with maintenance of the NAAQS downwind, reducing the identified upwind emissions via regional emissions allowance trading programs. Step 1

– In the original CSAPR, downwind air quality problems we re assessed using modeled future air quality
concentr ations for a year aligned with attainment deadlines for the NAAQS considered in that rulemaking . The assessment of future air qualit y conditions generally accounts for on

- the

books emission reductions 32 and the most up

- to

- date forecast of future emissions i n the absence of the transport policy being

32 Since CSAPR was designed to replace CAIR, CAIR emissions reductions were not considered “on

- the

- books.”42

evaluated (i.e., base case conditions) . The locations of downwind air quality problems are identified as those with receptors that are projected to be unable to attain (i.e., nonattainment receptor) or maintain ( i.e., maintenance receptor) the standard. This proposal follows this same general approach. However, the EPA also proposes to consider current monitored air quality data to further inform the projected identification of downwind air quality problems for th is proposal. Further details and application of step one for this proposal are described in section V of this notice. Step 2

– The original CSAPR use d a screening threshold of one percent of the NAAQS to identify upwind states that were “linked” to downwin d air pollution problems. States were identified as needing further evaluation for actions to address transport if their air quality impact 33 was greater than or equal to the threshold for at least one downwind problem receptor (i.e., nonattainment or maintenance receptor identified in step 1)
. We evaluate d a given state’s contribution based on the average relative downwind impact calculated over multiple days. States whose air quality impacts to all downwind problem receptors we re below this threshold d id not require further evaluation for actions to address transport

— that is, these

33 For ozone the impacts would include those from volatile organic compounds (VOC) and NO X, and from all sectors.43

states we re determined to make insignificant contributions to downwind air quality problems and therefore have no emission reduction obligations under the good neighbor pr ovision. The EPA

use d this threshold because much of the ozone nonattainment problem in the eastern half of the United States results from relatively small contributions from a number of upwind states. Use of the one percent threshold for CSAPR is discusse d in the preambles to the proposed and final CSAPR rules. See 75 FR 45237 (Aug. 2, 2010); 76 FR 48238, (Aug. 8, 2011). The EPA proposes to use this same approach for this rule. A pplication of step two for this proposal is described in section V of this not ice. Step 3

– For states that are linked in step 2 to downwind air quality problems, the original CSAPR use d a multi

- factor test to evaluate emission reductions available in upwind states by application of uniform cost threshold s . T he EPA evaluate d NO X reductions that we re available in upwind states by applying a marginal cost of NO X emissions to entities in these states. This approach , in essence , simulate d placing an economic value on NO X emissions and evaluate d emission reduction potential that was

c ost

- effective under this constraint. The EPA evaluate d NO X

r eduction potential , cost, and downwind air quality improvements available at several cost thresholds in t he multi

- factor test
. This evaluation quantifie d the magnitude of emissions that significantly contribute to nonattainment or interfere with44

maintenance of a NAAQS downwind and apportion ed upwind responsibility among linked states , an approach upheld by the U.S. Supreme Court in EPA v. EME Homer City
. 34 The EPA proposes to apply this ap proach to identify NO X emission reductions necessary to reduce interstate transport for the 2008 ozone NAAQS , updated to also explicitly consider over

- control. For this proposal, the multi

- factor test is also used to evaluate possible over

- control by evaluating if an upwind state is linked solely to downwind air quality problems that are resolved at a given cost threshold, or if upwind states would reduce their emissions at a given cost threshold to the extent that they would no longer meet or exceed t he 1% air quality contribution threshold. This evaluation of cost, NO X reductions, and air quality improvements, including its consideration of potential

over - control, results in the EPA’s determination of upwind emissions that significantly contribute to nonattainment or interfere with maintenance of the NAAQS downwind. Next, emissions budgets are determined. Emissions budgets are remaining allowable emissions after the elimination of emissions identified as significantly contributing to nonattainment or i nterfering with maintenance of the standard downwind. The EPA’s assessment of significant contribution to nonattainment and

34 EPA v. EME Homer City Generation, L.P., 134 S. Ct. 1584, 1606

- 07 (2014).45

interference with maintenance and development of EGU NO X ozone season emissions budgets is described in section VI of this notice.
S tep 4

– Finally, the original CSAPR use d allowance trading programs to implement the necessary emission reductions. Specifically , the emissions budgets identified in step 3 we re implemented via a tradable allowance program. Emissions allowances we re issued to units covered by the trading program and the allowance s can be turned in at the close of each compliance period to account for a specified amount of ozone
season EGU NO X emissions. Additionally, the original CSAPR included variability limits, which define the amount by which collective emissions within a state may exceed the level of the budgets in a given year to account for variability in EGU operations. CSAPR set assurance levels equal to the sum of each state’s emissions budget plus its variability limit. The original CSAPR include d assurance provisions that help to assure that state emissions remain below the assurance levels in each state by requiring additional allowance surre nder s in the instance that emissions in the state exceed the state’s assurance level. This limited interstate trading approach is responsive to previous court decisions (see discussion in section IV of this preamble) and has been upheld in subsequent liti gation regarding CSAPR. The EPA proposes to apply this46

approach to reduce interstate transport for the 2008 ozone NAAQS. Implementation using the CSAPR allowance trading program is described in section V II of this notice. 2. Partial versus Full Resolution of Transport Obligation Given the unique circumstances surrounding the implementation of the 2008 ozone standard that have delayed state and EPA efforts to address interstate transport, at this time the EPA is focusing its efforts on the immediately availa ble and cost

- effective emission reductions that are achievable by the 2017 ozone season .

a. Partial R emedy under P roposed FIPs This rule proposes to establish (or revise currently established) FIPs for 23 eastern states under the good neighbor provision of the CAA. These FIPs contain requirements for EGUs in these states to reduce ozone season NO X emissions for the 2017 ozone season. As noted in section VI, the EPA has identified important EGU emission reductions that are achievable starting for the 2017 ozone season in each of the covered states through actions such as turning on and operating exi sting pollution controls. These readily available emission reductions will assist downwind states to attain and maintain the 2008 ozone NAAQS and will provide human health and welfare benefits through reduced exposure to ozone pollution.47

While these reduct ions are necessary to assist downwind states attain and maintain the 2008 ozone NAAQS and are necessary to address good neighbor obligations for these states, the EPA acknowledges that they may not be sufficient to fully address these states’ good neighbor obligations. 35 With respect to the 2008 ozone standard, the EPA has generally not attempted to quantify the ozone season NO X reductions that may be necessary to eliminate all significant contribution to nonattainment and interference with maintenance in ot her states. Given the time constraints for implementing NO X reduction strategies, the EPA believes that implementation of a full remedy may not be achievable for 2017, even though a partial remedy is achievable. To evaluate full elimination of a state’s s ignificant contribution to nonattainment and interference with maintenance, EGU and non

- EGU ozone season NO X reductions should both be evaluated. However, the EPA is not proposing to quantify non

- EGU emission s reductions to address interstate ozone transpo rt for the 2008 ozone NAAQS at this time because: (1) there is greater uncertainty in the non

- EGU emission inventory estimates than for EGUs; and (2) there appear to be few non

- EGU reductions that could be accomplished by the beginning of the 2017 ozone se ason. This is discussed further in section VI of this proposal and in

35 The proposed requirements for one state, North Carolina, would fully eliminate that state’s significant contributi on to downwind air quality problems.48

the Non

- EGU NO X Mitigation Strategies TSD
. We intend to continue to collect information and undertake analysis for potential future emissions reductions at non

- EGUs that may be necessary to fully quantify states’ significant contributions in a future action. Because the reductions proposed in this action are EGU

- only and because EPA has focused the policy analysis for this proposal on reductions available by 2017, for most states they
rep resent a first, partial step to addressing a given upwind state’s significant contribution to downwind air quality impacts for the 2008 ozone NAAQS. Generally, a final determination of whether the proposed EGU NO X reductions represent a full or partial eli mination of a state’s good neighbor obligation for the 2008 NAAQS is subject to an evaluation of the contribution to interstate transport from additional emission sectors, such

as non - EGUs. However, the EPA believes that it is beneficial to implement, with out further delay, EGU NO X reductions that are achievable in the near term. The proposed NO X emission reductions are needed (although they may not be all that is needed) for these states to eliminate their significant contribution to nonattainment and interference with maintenance of the 2008 ozone NAAQS. The EPA’s current statutory deadlines to promulgate FIPs extend until 2017 for most states, and the EPA will remain mindful of those deadlines as it evaluates what further steps49

may be necessary to address interstate transport for the 2008 ozone NAAQS. The EPA seeks comment on possible future ste ps that may be necessary to resolve the remainder of the good neighbor obligation for the 2008 ozone standard. The EPA has shared information with states to facilitate the development of the ozone transport SIPs. 36 The EPA encourages state SIP development a nd will continue to assist states in developing transport SIPs regardless of whether they are covered by this proposed FIP. Where a state would be covered by this proposed FIP, the EPA may be able to partially approve SIPs that include controls on EGU emis sions that achieve ozone season NO X emission reductions and/or that establish EGU NO X ozone emissions budget s approximately equivalent to those identified in this proposal as achievable by 2017. (This is discussed in more detail in Section VII.) In these S IPS, states could also demonstrate that they are achieving the same level of emissions reductions through non

- EGU source measures as they would achieve under the EGU budgets established in the FIP. For example, a SIP could set EGU budgets, but allow emiss ion reductions from

non - EGU sources as a compliance option. EPA also seeks comment

36 On January 22, 2015, the EPA issued a memo with preliminary air quality modeling data that characterized interstate ozone transport projected to 2018. On April 8, 2015, the EPA held a workshop that continued a discuss ion with states on the path forward for addressing interstate transport for the 2008 8

- hour ozone NAAQS. On August 4, 2015, we published a NODA with updated modeling that states could use to support development of transport SIPs.50

on methods it can use to ensure tha t any non - EGU reductions are incremental to the base case, permanent, and enforceable
.

b. Potential for F ull R emedy u nder SIPs The EPA also notes that many states have already submitted ,

or are currently developing , SIP submittals to address the good neighbor provision of the CAA for the 2008 ozone standard , and expects that some may assert that the state plan fully address es the state’s good neighbor obligation
. The EPA anticipates that those SIPs intending to fully address the state’s good neighbor obligations and for which the state is seeking approval may fall into one of two categories: (1) The SIP concludes that the state is meeting its good neighbor obligation without need for additional NO X reductions
. This SIP could include an adequate demonstration, using EPA or
state

- generated analytical results, which support s the state ’s conclusion that the state contributes insignific ant amounts to downwind nonattainment or maintenance problems in other states
. The EPA would generally expect to propose full approval of these
SIPs. (2) The SIP demonstrates that the state will timely achieve reductions that fully address its significant contribution to nonattainment or interference with maintenance in downwind states. This demonstration could include an assessment of how all emissions source sectors contribute to the state’s51

contribution and how these sectors are controlled in that state
. States wishing to seek full approval of good neighbor SIPs should contact their appropriate regional office. Guidance on developing such SIPs is outside the scope of this action, but the EPA intends to work closely with any state that is interested in pu rsuing this option. 3. Why We Focus on Eastern States CSAPR and previous federal transport rules, such as the NO X SIP Call and CAIR, were designed to address collective contributions of ozone pollution from states in the eastern U.S. These rules did not address contributions in the 11 western contiguous United States. 37 The EPA’s air quality modeling that supports thi s proposed rule includes data for the western states. This assessment shows that there are problem receptors in the West to which western states contribute amounts greater than or equal to the screening threshold used to evaluate transport across eastern s tates (i.e., 1 percent of the NAAQS). However, there may be additional criteria to evaluate regarding transported air pollution in the West when evaluating upwind states’ contributions to downwind air quality

37 For the purpose of this action, the western U.S. (or the West) consists of the 11 western contiguous states of Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington, and Wyoming, and the eastern U.S. (or East) consists of the remaining states in the contiguous U.S.52

impacts, such as those discussed in EPA

- state m eetings to discuss approaches for determining how emissions in upwind states impact air quality in downwind states. 38 Given that the

near - term 2017 implementation timeframe constrains the opportunity to conduct a further evaluation of western states, the EP A proposes to focus this rulemaking on eastern states. This focus would not relieve western states of obligations to address interstate transport under the Act. The EPA and states working together w ould continue to evaluate interstate transport in the west ern states on a case

- by

- case basis. The
EPA would also continue to engage with western states on air quality modeling analyses and the implications of those analyses for interstate transport. While the EPA proposes to focus this rulemaking on eastern
stat es, we seek comment on whether to include western states in this rule
. The EPA notes that analyses developed to support this proposal, including air quality modeling and the EPA’s
assessment of EGU NO X mitigation potential, contain data that could be usefu l for states in developing SIPs or could be used to develop FIPs, where necessary. The EPA seeks comment on the data provided for western states, including emissions inventories, ozone concentration

38 For example, EPA

- State meetings held in Research Triangle Park, NC on April 8, 2013 and Denver, Colorado on April 17, 2013.53

modeling, contribution modeling, and EPA’s assessment of EGU NO X reduction potential. 39 These data are available in the docket for this proposal. The EPA also solicits comment on whether to promulgate FIPs to address interstate ozone transport for the 2008 ozone NAAQS for western states, either in this rulemaking or in a subsequent rulemakin g. 4. Short

- Term NO X Emissions In eastern states, the highest measured ozone days tend to occur within the hottest days, weeks, or months of the summer. On many high ozone days, there is higher demand for electricity (for instance, to run air conditioners). In general and technical discussions with representatives and officials of eastern states in April 2013 and April 2015, and in several letters to the EPA, officials from the Ozone Transport Region (OTR) 40 states suggested that EGU emissions transported from upwind states may disproportionally affect downwind ozone concentrations on peak ozone days in the eastern U.S. These

39 On August 4, 2015, the EPA published a Notice of Data Availability (80 FR 46271) requesting comment on t he air quality modeling platform and air quality modeling results that are being used for this proposed rule. Specifically, in the NODA, the EPA requested comment on the data and methodologies related to the 2011 and 2017 emissions and the air quality mode ling to project 2017 concentrations and contributions. Comments received on that data via the NODA will be considered for the final rule. 40 The OTR was established by the CAA amendments of 1990 to facilitate addressing the ozone problem on a regional basis and consists of the following states: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylv ania, Rhode Island, Vermont, the District of Columbia and northern Virginia. 42 U.S.C. 7511c, CAA section 184.54

representatives asked that the EPA consider additional “peak day” limits on EGU NO X emissions. Some states have also asked the EPA to co nsider whether existing emission controls are being turned off for short periods (e.g., multiple days) within the ozone season, for example during hot weeks. These states assert that emissions from short

- term idling of controls may contribute to downwind

o zone NAAQS exceedances in the eastern U.S. These states suggest that sub

- seasonal limits on EGU NO X emissions would reduce ozone formation that might be attributable to short

- term idling of NO X controls. The EPA seeks comment on whether or not short

- term ( e.g., peak

- day) EGU NO X emissions disproportionately impact downwind ozone concentrations, and if they do, then what EGU emission limits (e.g., daily or monthly emission rates or differential allowance surrender ratios on high ozone days) would be reasonab le complements to the proposed seasonal CSAPR requirement to mitigate this impact.
C. Respondin g to the Remand of CSAPR NO X Ozone

- Season Emissions Budgets As noted above, in EME Homer City II , the D.C. Circuit declared invalid the CSAPR phase 2 NOx ozone - season emissions budgets of 11 states, holding that those budgets over

- control with respect to the downwind air quality problems to which those55

states were linked for the 1997 ozone NAAQS. 795 F.3d at 129

- 30, 138
. As to ten of these states, the court held that EPA’s 2014 modeling conducted to support the RIA for CSAPR demonstrated that air quality problems at the downwind locations to which those states were linked would resolve by phase 2 of the CSAPR program without further transport regulation (eit her CAIR or CSAPR). Id. at 129

- 30
. With respect to Texas, the court held that the record reflected that the ozone air quality problems to which the state was linked could be resolved at a lower cost threshold. Id. The court therefore remanded those budgets to EPA for reconsideration consistent with the court’s opinion. Id. at 138
. The court instructed the EPA to act “promptly” in addressing these issues on remand. Id. at 132
. The court’s decision explicitly applies to 11 state budgets involved in that litig ation : Florida, Maryland, New Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Texas, Virginia, and West Virginia. Id. at 129

- 30, 138
. EPA is proposing in this rule to promulgate FIPs for nine of those states to address interstate transport with respect to the 2008 ozone NAAQS: Maryland, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Texas, Virginia, and West Virginia. The proposed FIPs incorporate revised emissions budgets that would supplant and replace the budgets prom ulgated in the CSAPR rule to address the 1997 ozone NAAQS, the same budgets remanded by56

the D.C. Circuit for reconsideration. Further, as proposed in this rule, these proposed budgets would be effective for the 2017 ozone season , the same period in which t he phase 2 budgets that were invalidated by the court are currently scheduled to become effective. Therefore, this proposed action provides an appropriate and timely response to the court’s remand by replacing the budgets promulgated in the CSAPR to addres s the 1997 ozone NAAQS, which were declared invalid by the D.C. Circuit, with budgets developed to address the revised and more stringent 2008 ozone NAAQS. 41 The EPA notes that it is able to propose addressing the D.C. Circuit’s remand of CSAPR NO X ozone - se ason emissions budgets because the agency was already performing analysis and policy development for this proposal, which is directly applicable to this aspect of the D.C. Circuit opinion. Separately, various petitioners filed legal challenges in the D.C. Circuit to a supplemental rule that added five states to the CSAPR ozone

- season trading program, 76 FR 80760 (Dec. 27, 2011). See Public Service Company of Oklahoma v. EPA , No. 12

- 1023 (D.C. Cir., filed Jan. 13, 2012). The case was held in

41 The methodology for developing the proposed budgets to address the 2008 ozone NAAQS is described in more detail in Sections VI and VII below. S ection VI also includes an evaluation, as instructed by the court in EME Homer City II , to affirm that the proposed budgets do not over - control with respect to downwind air quality problems identified in this rule. 795 F.3d at 127

- 28 .57

abeyance during the pendency of the litigation in EME Homer City . The case remains pending in the D.C. Circuit as of the date of signature of this rule. 42 The EPA notes that this rule also proposes to promulgate FIPs for all five states added to CSAPR in the supplemental rule: Iowa, Michigan, Missouri, Oklahoma, and Wisconsin. The proposed FIPs incorporate revised emissions budgets that would supplant and replace the budgets promulgated in the supplemental CSAPR rule t o address the 1997 ozone NAAQS for the se five states and would be effective for the 2017 ozone season
. For the two remaining ozone

- season states affected by this portion of the EME Homer City II decision, Florida and South Carolina, the EPA is not proposing in this action to promulgate
FIPs be cause the air quality modeling performed to support the proposal does not indicate that these states are linked to any identified downwind nonattainment or maintenance receptors with respect to the 2008 ozone standard. Inherently then, because the 2008 ozone NAAQS is more stringent than the 1997 ozone NAAQS, this modeling also does not indicate that Florida or South Carolina are linked to any remaining air quality concerns with

42 In 2012, the EPA al so finalized two rules making certain revisions to CSAPR. 77 FR 10324 (Feb. 21, 2012); 77 FR 34830 (June 12, 2012). Various petitioners filed legal challenges to these rules in the D.C. Circuit, and the cases were also held in abeyance pending the litiga tion in EME Homer City
. See Wisconsin Public Service Corp. v. EPA , No. 12

- 1163 (D.C. Cir., filed Apr. 6, 2012); Utility Air Regulatory Group v. EPA , No. 12

- 1346 (D.C. Cir., filed Aug. 9, 2012). The cases currently remain pending in the D.C. Circuit.58

respect to the 1997 ozone standard for whic h the states were regulated in CSAPR. Accordingly, in order to address the Court’s remand with respect to these two states’ interstate transport responsibility under the 1997 ozone standard, the EPA proposes to remove th e se states from the CSAPR ozone

- sea son trading program beginning in 2017 when the phase 2 ozone - season emissions budgets were scheduled to be implemented.
T he EPA notes that because the proposed rule modeling was performed prior to the D.C. Circuit’s issuance of EME Homer City
II , that modeling assumed in its baseline for all states the emission reductions associated with the CSAPR phase 2 ozone

season budgets. In the final rule modeling, the EPA will make any additional changes to the emissions inventories or modeling platform as may be justified based on comments received on the modeling performed for the proposed rule
. I n the event th at air quality modeling conducted for the final rule demonstrates that either Florida or South Carolina are projected to significantly (e.g., greater than or equal to 1% of the NAAQS) contribute to an air quality problem with respect to the 2008 ozone standard in the absence of a CSAPR

- related emissions budget in place for those states , the EPA instead proposes to finalize revised budget s (presented with th is rulemaking for comment) for whichever of those states may be identified as linked to such59

air quality problems rather than remove th os e state s from the
CSAPR ozone

- season trading program
. The EPA has calculated emissions budgets for Florida and South Carolina that we are proposing to apply to those states if, and only if, the final rule air quality modeling identifi es a linkage as just described. T hese proposed budgets are developed using t he same methods applied to the 23 states that the EPA proposed to regulate in this action. These methods are described in section VI of this proposal and the methods and resulting emissions budgets are provided in the Ozone Transport Policy Analysis TSD
. T he EPA seeks comment on this approach with respect to addressing the remand as to Florida and South Carolina , including the proposed budgets that would apply to those states if a linkage is identified, which are available in the docket
. Additionally, the EPA notes Florida and South Carolina may be relying upon emissions reductions that result from now

remanded emissions budgets in Florida and South Carolina to satisfy statutory obligations other than the interstate transport requirements
. However, Florida and South Carolina may have an interest in submitting SIPs to continue their participation in the CSAPR NO X ozone - season trading program in order to meet other Clean Air Act requirements. Likewise, to the extent that the final modeling indicates that other states included in the remand of the CSAPR phase 2 NO X ozone - season60

emissions budgets are not linked to any identified downwind nonattainment or maintenance receptors with respect to the 2008 ozone standard, they would not be included in the final FIP s but they may be interested in continuing to participate in the CSAPR
NO X ozone - season trading program in order to meet other Clean Air Act requirements. The EPA seeks comment on whether to allow Florida , South Carolina, and other similar ly situated states (if any) to continue their participation in the CSAPR NO X ozone season program through voluntary SIPs that would retain the
CSAPR NO X ozone - season emissions budgets, contingent upon revi ew and approval by the EPA
. The D.C. Circuit also remanded without vacatur the CSAPR SO 2 annual emissions budgets for four states (Alabama, Georgia, South Carolina, and Texas) for reconsideration. 795 F.3d at 129, 138
. This proposal does not address the remand of these CSAPR phase 2 SO 2 annual emissions budgets. The EPA intends to address the remand of the phase 2 SO 2 annual emissions budgets separately. The existing CSAPR annual emission s budgets and implementation programs (CSAPR SO 2 annual and NO X annual requirements), which addres s interstate transport for the 1997 and 2006 PM 2.5 NAAQS, continue to apply at this time.
D. Addressing Outstanding Transport Obligations for the 1997 Ozone NAAQS61

In the original CSAPR, the EPA noted that the reductions for 11 states may not be sufficient to fully eliminate all significant contribution to nonattainment or interference with maintenance for certain downwind areas with respect to the 1997 ozone NAAQS . 43 The 11 states are: Alabama, Arkansas, Georgia, Illinois, Indiana, Kentucky, Louisiana, Mississi ppi, Missouri, Tennessee, and Texas
. 44 In the original CSAPR, the EPA’s analysis projected continued nonattainment and maintenance problems at downwind receptors to which these upwind states were linked after implementation of the CSAPR trading programs
. Sp ecifically, the persistent ozone problems were expected in Baton Rouge, Louisiana; Houston, Texas; and Allegan, Michigan according to the remedy case modeling conducted for the final rule
. At that time the EPA did not address whether additional

ozone seaso n NO X emission reductions would be needed in these
states to fully resolve the good neighbor obligation under the CAA with respect to the 1997 ozone NAAQS beyond the EGU requirements promulgated in CSAPR
.

43 Se e CSAPR Final Rule , 76 FR at 48220, and the CSAPR Supplemental Rule, 76 FR at 80760 , December 27, 2011
. 44 The EPA acknowledges that, despite its conclusion in CSAPR that the air quality problems to which Texas was linked in the original CSAPR were not full y resolved, the court concluded in EME Homer City II that the NOx ozone

season emissions budget finalized for Texas resulted in over

- control as to the ozone air quality problems to which the state was linked. 795 F.3d at 129

- 30. As discussed below in sec tion V, this rule proposes to respond to the remand of Texas’s NOx ozone

- season emissions budget by promulgating a new budget to address the 2008 ozone NAAQS. The EPA has also evaluated Texas’s contribution to any remaining air quality problems with respe ct to the 1997 ozone NAAQS . [Text may be revised to reflect ongoing litigation.]6 2

To evaluate whether additional emission reductions would be needed in these 11 states to address the states’ full good neighbor obligation for the 1997 ozone NAAQS, the EPA reviewed the 2017 base line air quality modeling conducted for this proposal , which includes emission reductions associated with the CSAPR phase 2 ozone

- season budgets
. The updated 2017 air quality modeling shows that the predicted average DVs and maximum DVs for 2017 are below the level of the 1997 ozone NAAQS for the downwind receptors of concern that the 11 states were linked to in the original CSAPR for the 1997 ozone NAAQS. Further, the 2017 air quality modeling shows that there are no other nonattainment or maintenance receptors to which these areas would be linked with respect to
t he 1997 ozone NAAQS. This conclusion demonstrates that no further emission reductions are required to address the interstate transport obligations of these states with respect to the 1997 ozone NAAQS , and therefore EPA finds that the original
CSAPR emissions budget s satisf y these states’ full obligation to address interstate ozone transport under the good neighbor provision of the CAA as to that NAAQS . Therefore, we propose to find that the original CSAPR FIPs fully satisfy those 11 states’ good neig hbor CAA obligation s regarding the emissions that contribute significantly to nonattainment or interfere with maintenance of the 1997 ozone NAAQS in other states.63

I V . Legal Authority A. EPA’s Authority for the Proposed Rule 1. Statutory Authority The statu tory authority for this proposed action is provided by the CAA as amended (42 U.S.C. 7401 et seq. ). Specifically, sections 110 and 301 of the CAA provide the primary statutory bases for this proposal. The most relevant portions of section 110 are subsectio ns 110(a)(1), 110(a)(2), and 110(a)(2)(D)(i)(I), and 110(c)(1). Section 110(a)(1) provides that states must make SIP submissions “within 3 years (or such shorter period as the Administrator may prescribe) after the promulgation of a national primary ambient air quality standard (or any revision thereof),” and that these SIP submissions are to provide for the “implementation, maintenance, and enforcement” of such NAAQS. 45 The statute directly imposes on states the duty to make these SIP submissions, and the requirement to make the submissions is not conditioned upon the EPA taking any action other than promulgating a new or revised NAAQS. 46 The EPA has historically referred to SIP submissions made for the purpose of satisfying the applicable requirements of CAA

45 42 U.S.C. 7410(a) (1). 46 See EPA v. EME Homer City Generation, L.P. , 134 S. Ct. 1584, 1601 (2014).64

sections 110(a)(1) and 110(a)(2) as “infrastructure SIP” submissions. Section 110(a)(1) addresses the timing and general requirements for infrastructure SIP submissions, and section 110(a)(2) provides more details concerning the required content of these submissions. It includes a list of specific elements that “[e]ach such plan” submission must address. 47 All states, regardless of whether the state includes areas designated as nonattainment for the relevant NAAQS, must have SIPs that meet the applic able requirements of section 110(a)(2), including provisions of section 110(a)(2)(D) (i)(I) described further below and which are the focus of this proposal. Section 110(c)(1) requires the Administrator to promulgate a FIP at any time within 2 years after the Administrator : 1) finds that a state has failed to make a required SIP submission, 2) finds a SIP submission to be incomplete pursuant to CAA section 110(k)(1)(C), or 3) disapproves a SIP submission , unless the
state corrects the deficiency through a S IP revision that the Administrator approves before the FIP is promulgat ed
. 48 Section 110(a)(2)(D)(i)(I) , also known as the “good neighbor provision,” provides the basis for this proposed action. It

47 EPA’s general approach to infrastructure SIP submissions is explained in greater detail in individual notices acting or proposing to act on state infrastructure SIP submissions and in guidance. See, e.g. , Guidance on Infrastructure State Implementation Plan (SIP) Elements under Clean Air Act Sections 110(a)(1) and 110(a)(2) (S ept. 2013). 48 42 U.S.C. 7410(c) (1).65

requires that each state SIP shall include provisions sufficient to “prohibit[] . . . any source or other type of emissions activity within the State from emitting any air pollutants in amounts which will

— (I) contribute significantly to nonattainment in, or interfere with maintenance by, any other State wit h respect to any [NAAQS].” 49
The EPA has previously issued three rules interpreting and clarifying the requirements of section 110(a)(2)(D)(i)(I) for
states in the eastern half of the United States. These rules, and the associated court decisions addressin g these rules , provide important guidance regarding the requirements of section 110(a)(2)(D)(i)(I). The NO X SIP Call, promulgated in 1998, addressed the good neighbor provision for the 1979 1

- hour ozone NAAQS and the 1997 8

- hour ozone NAAQS. 50 The rule req uired 22 states and the District of Columbia to amend their SIPs and limit NO X emissions that contribute to ozo ne nonattainment. The EPA set a NO X ozone season budget for each affected state, ess entially a cap on

ozone season NO X emissions in the state. Sources in the affected states were given the option to participate in a regional cap

and

- trade program, known as the NO X Budget Trading Program (NBP). This rule was largely upheld by the D.C. Circuit in Michigan v.

49 42 U.S.C. 7410(a)(2)(D)(i)(I). 50 63 FR 57356 (Oct. 27, 1998).66

EPA , 213 F.3d 6 63 (D
. C . Cir. 2000), cert. denied , 532 U.S. 904 (2001). The Clean Air Interstate Rule (CAIR), promulgated in 2005, addressed both the 1997 PM 2.5 and ozone standards under the good neighbor provision. 51 CAIR required SIP revisions in 28 states and the District of Columbia to ensure that certain emissions of sulfur dioxide ( SO 2 ) and/or NO X — important precursors of regionally transported PM 2.5 (SO 2 and NO X ) and ozone (NO X )

– were prohibited. Like the NO X S IP Call, states were given the option to participate in a regional cap

- and

- trade program to satisfy their SIP obligation s . When the EPA promulgated the final CAIR in May 2005, the EPA also issued a national rule finding that states had failed to submit SIP s to address the requirements of CAA section 110(a)(2)(D)(i) with respect to the 1997 ozone and
PM 2.5 NAAQS, given that states were required by the CAA to have submitted section 110(a)(2)(D)(i)(I) SIPs for those standards by July 2000. 52 This finding of failure to submit triggered a 2

- year clock for the EPA to issue FIPs to address interstate transport, and on March 15, 2006 , the EPA promulgated FIPs to ensure that the emission reductions required by CAIR would be achieved on schedule. 53 CAIR wa s remanded to EPA by the D.C. Circuit in North

51 70 FR 25162 (May 12, 2005). 52 70 FR 21147 (April 25, 2005). 53 71 FR 25328 (April 28, 2006).67

Carolina , 531 F.3d 896 (D.C. Cir. 2008) , modified on reh’g , 550 F.3d 1176. For more information on the legal considerations of CAIR and the D.C. Circuit holding in North Carolina , refer to the preamble of the final CSAPR rule
. 54 In 2011, the EPA promulgated CSAPR to address the issues raised by the remand of CAIR and additionally to address the good neighbor provision for the 2006 PM 2.5 NAAQS. 55 CSAPR require s 28 states to reduce SO 2 emissions, annual NO X emissions, and/or

ozone season NO X emissions that significantly contribute to other states’ nonattainment or interfere with other states’ abilities
to maintain these air quality standards. To accomplish implementation aligned with the applicable attainment deadlines, the EPA promulgated FIPs for each of the 28 states covered by
CSAPR . The FIPs implement regional cap

- and

- trade programs to achieve the necessary reductions. States can submit good neighbor SIPs at any time that, if approved by the EPA, would replace the CSAPR FIP for that state. As discussed below, CSAPR was the subject of decisions by both the D.C. C ircuit and the Supreme Court , which largely upheld the rule
. On August 21, 2012, the D.C. Circuit issued a decision in EME Homer City Generation, L.P. v. EPA , 696 F.3d 7 (D.C. Cir.

54 76 FR 48208, 48217 (Aug. 8, 2011). 55 76 FR 48208.68

2012) , vacating CSAPR and holding, among other things, that states had no obligation to submit good neighbor SIPs until the EPA had first quantified each state’s good neighbor obligation. 56
Th e implication of this decision was that the EPA did not have authority to promulgate FIPs as a result of states’ failure to submit or EPA’s disapproval of such SIPs. The EPA sought review, first with the D.C. Circuit en banc and then with the Supreme Court. While the D.C. Circuit declined to consider the EPA’s appeal en banc , 57 on January 23, 2013, the Supreme Court granted the EPA’s petition for certiorari. 58 On April 29, 2014, the Supreme Court issued a decision reversing th e D.C. Circuit’s EME Homer City opinion on CSAPR and held, among other things, that under the plain language of the CAA, states must submit SIPs addressing the good neighbor provision within 3 years of promulgation of a new or revised NAAQS, regardless of whether the EPA first provides guidance, technical data or rulemaking to quantify the state’s obligation. 59 Thus, the Supreme Court affirmed that states have an obligation in the first instance to address the good neighbor

56 EME Homer City Generation, L.P. v. EPA , 696 F.3d 7, 31 (D.C. Cir. 2012). 57 EME Homer City Generation, L.P. v. EPA , No. 11

- 1302 (D.C. Cir. January 24, 2013), ECF No. 1417012 (denying the EPA’s motion for rehearing en banc). 58 EPA v. EME Homer City Generation, L .P. , 133 S. Ct. 2857 (2013) (granting the EPA’s and other parties’ petitions for certiorari). 59 EPA v. EME Homer City Generation, L.P. , 134 S. Ct. 1584, 1600

- 01 (2014).69

provision after promulgation of a new or revised NAAQS, a holding that also applies to states’ obligation to address interstate transport for the 2008 ozone NAAQS. The Supreme Court remanded the litigation to the D.C. Circuit for further proceedings. Finally, o n July 28, 2015, the D.C. Circuit issued its opinion on CSAPR regarding the remaining legal issues raised by the Petitioners on remand from the Supreme Court, EME Homer City
II , 795 F.3d 118
. This decision largely upheld EPA’s approach to addressing interstate transport in CSAPR , leav ing the rule in place and affirm ing EPA’s interpretation of various statutory provisions and EPA’s technical decisions. The decision also remands the rule with out vacatur for reconsideration of EPA’s emissions budgets for certain states. In particular and as discussed in more detail in section III , the court declared invalid the CSAPR phase 2 NOx ozone - season emissions budgets of 11 states, holding that those budgets over

- control with respect to the downwind air quality problems to which those states w ere linked for the 1997 ozone NAAQS
. T he court’s decision explicitly applies to 11 states: Florida, Maryland, New Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Texas , Virginia, and West Virginia. Id. at 129

- 30, 138
. The court also remanded without vacatur the SO 2 annual emissions budgets for four states (Alabama, Georgia, South Carolina, and Texas) for70

reconsideration. Id. at 129, 138
. The court instructed the EPA to act “promptly” in addressing these issues on remand
. Id. at 132
. Section 301(a)(1) of the CAA also gives the Administrator of the EPA general authority to prescribe such regulations as are necessary to carry out her functions under the Act. 60 Pursuant to this section, the EPA has authority to clarify the applicability of CAA requirements. In this action, among other things, the EPA is clarifying the applicability of section 110(a)(2)(D)(i)(I) by identifying NO X emissions in certain states that must be prohibited pursuant to this section with respect to the 8

- hour ozone NAAQS promulgated in 2008. In particular, the EPA is proposing to use its authority under sections 110 and 301 to promulgate FIPs that establish or revise EGU NO X ozone - season emissions budget s for 23 eastern
states to mitigate their significant contribution to nonattainment or interfere nce with maintenance in another state. As described in more detail later in this notice, generally the EPA is proposing to update each affected state ’s FIP, including

re vising the existing CSAPR budgets. 61 The EPA is also proposing

60 42 U.S.C. 7601(a)(1). 61 One state, Kansas, would have a new CSAPR ozone season requir ement under this proposal. The remaining 22 states were included in the original CSAPR ozone - season program as to the 1997 ozone NAAQS.71

to respond to the court’s remand in EME Homer City II with respect to the remanded NO X ozone - season emissions budgets. 2. FIP Authority for Each State Covered by the Proposed Rule.

a. Status of S tate G ood N eighbor SIPs for the 2008 O zone NAAQS As discussed above, all states have an obligation to submit SIPs that address the requirements of CAA section 110(a)(2) within 3 years of promulgation of a new or revised NAAQS. With respect to t he 2008 ozone NAAQS, states were required to submit SIPs addressing the good neighbor provision by March 12, 2011. If the EPA finds that a state has failed to submit a SIP to meet its statutory obligation to address section 110(a)(2)(D)(i)(I) or if EPA dis approves a good neighbor SIP , then the EPA has not only the authority but the obligation , pursuant to section 110(c)(1) , to promulgate a FIP to address the CAA requirement within 2 years of the finding or disapproval
. On July 13, 2015 , the EPA published a rule finding that 24 states failed to make complete submissions that address the requirements of section 110(a)(2)(D)(i)(I) related to the interstate transport of pollution as to the 2008 ozone NAAQS
. See 80 FR 39961 ( July 13, 2015 ) (effective August 12, 2 015)
. The finding action triggered a 2

- year deadline for the EPA to issue FIPs to address the good neighbor provision for these states by72

August 12, 2017. The states included in this finding of failure to submit are : Alabama, Arkansas, California, Florida, Georgia, Iowa, Illinois, Kansas, Massachusetts, Maine, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Vermont, Virginia , and West Virginia
. Since the EPA issued the findings notice, EPA has received

a SIP submission addressing the good neighbor provision for the 2008 ozone NAAQS from the state of Maine on which the EPA has not yet proposed action.
S everal additional states

– Connecticut, Nebraska, Nort h Dakota, Rhode Island, South Dakota, New York, Delaware, Maryland, Indiana, Kentucky, Louisiana, New J ersey, Ohio, Texas , Wisconsin , and the District of Columbia

– have previously submitted SIP s to address the requirements of section 110(a)(2)(D)(i)(I) for the 2008 ozone NAAQS. To the extent that the EPA has not finalized action on these submitted SIPs, these states can evaluate their submissions in light of this proposal and the actions we are taking to reduce interstate ozone transport for the 2008 ozo ne NAAQS. Pursuant to a judgment issued on May 1 5, 2015, the EPA is required to take final action

on the interstate transport SIPs for Nebraska and North Dakota by January 29, 2016 , and for Maryland, Texas, Ohio and Indiana73

by June 7, 2016. 62 In the event that the EPA finalizes disapproval or partial disapproval of any of these SIPs, that action would tri gger the EPA’s F IP authority to implement the requirements of the good neighbor provision for those states. Alternatively, if any of these sta tes withdraws its 2008 ozone interstate transport SIP submittal, the EPA plans to issue a separate notice of finding of failure to submit for these states and will finalize FIPs as appropriate. On March 7, 2013, t he EPA finalized action on the State of Kentucky’s SIP submission addressing , among other things, the good neighbor provision requirements for the 2008 ozone NAAQS
. 63 The EPA disapproved the submission as to the good neighbor requirements. I n the notice, the EPA explained that the disapproval of the good neighbor portion of the state’s infrastructure SIP submission did not trigger a mandatory duty for the EPA to promulgate a FIP to address these requirements. 64 Citing the D.C. Circuit’s decision EME Homer City Generation v.
EPA , 696 F.3d 7 (2012), the EPA explained that the court concluded states have no obligation to make a SIP submission to address the good neighbor provision for a new or revised NAAQS until the EPA first defines a state’s obligations pursuant to

62 See Judgment, Sierra Club v. McCarthy, Case 4:14

- cv - 05091

- YGR (N.D. Cal. May 15, 2015). 63 78 FR 14681 (March 7, 2013)
. 64 Id. at 14683.74

that section. 65 Therefore, because a good neighbor SIP addressing the 2008 ozone standard was not at that time required, the EPA indicated that its disapproval action would not trigger an obligation for the EPA to promulgate a FIP to address the interstate transport requ irements. 66 On April 30, 2013 , the Sierra Club filed a petition for review of the EPA’s action based on the Agency’s conclusion that the FIP clock was not triggered by the disapproval of Kentucky’s good neighbor SIP. 67 As described above, o n April 29 , 2014, the Supreme Court issued a decision reversing and vacating the D.C. Circuit’s decision in EME Homer City
. Following the Supreme Court decision, the EPA requested , and the court granted , vacatur and remand of the portion of the EPA’s final action that determined that the FIP obligation was not triggered by the disapproval. 68 In this notice , the EPA is proposing to correct the portion of the disapproval notice indicating that the FIP clock would not be triggered by the SIP disapproval . The EPA believes that the EPA’s obligation to develop a FIP was triggered on the date of the judgment issued by the Supreme Court in EPA v. EME Homer

65 Id. 66 Id. 67 Sierra Club v. EPA , Case No. 13

- 3546 (6th Cir., filed Apr. 30, 2013). 68 Order, Sierra Club v. EPA , Case No. 13

- 3546, Document No. 74

- 1 (Mar. 13, 2015).75

City , June 2 , 2014 , and the EPA is obligated to issue a FIP at any time within two years of that date
. The EPA does not believe that the FIP obligation was triggered as of the date of the SIP disapproval because the controlling law as of that date was the D.C. Circuit decision in EME Homer City , which held that states had no obligation to submit a SIP and t he EPA had no authority to issue a FIP until the EPA first quantified each state’s emission reduction obligation under the good neighbor provision. Accordingly, the most reasonable conclusion is that the EPA’s FIP obligation was triggered when the Supreme Court clarified the state and federal obligations with respect to the good neighbor provision. Thus, the EPA proposes to find that the FIP obligation was triggered as of June 2 , 2014, and that the EPA is obligated to promulgate a FIP that corrects the defi ciency by June 2 , 2016
. b
. States S ubmitting T ransport SIPs before FIP I s F inalized The EPA recognizes that some states are currently developing SIP submissions or revising their submitted SIP s to address the good n eighbor provision of the CAA for the 2008 ozone standard . The EPA encourages SIP development and will continue to assist states in developing transport SIPs. As noted above , the EPA is subject to a court order requiring final action on certain state SIPs by January 29, and June 7, 2016
.76

The fact that the EPA is proposing a FIP for any state does
not suggest that the EPA has determined that the state’s submittal is not approvable. If EPA finalizes approval of a state’s good neighbor SIP before the FIP is applied, the FIP that is now being proposed for that state would no longer be
necessary. Further, the EPA notes that the remedy being proposed in this notice are not the only means a state has to mitigate interstate ozone transport under the good neighbor provision
. States could submit me asures that strengthen their current SIPs and achieve reductions that are similar to , or more efficacious in eliminating significant transport than , those that would be achieved by the FIPs proposed in this action . The EPA strongly encourages such strength ening actions. If a state submits a SIP that is approved (in whole or in part) by the EPA via notice

and

- comment rulemaking and that achieve s ozone season NO X emission reductions and/or establish es EGU NO X ozone emissions budget s approximately equivalent to those identified by EPA as achievable by 2017 , the EPA does not anticipate subject ing the
state to the EPA’s partial remedy in this FIP action
.

V. Analyzing Downwind Air Quality and Upwind - State Contributions In this section, we describe the air quality modeling performed to (1) identify locations where we expect there to be77

nonattainment or maintenance problems for 8

- hour ozone for the 2017 analytic year chosen for this proposal, and (2) quantify the contribut ions from anthropogenic emissions from upwind states to downwind ozone concentrations at monitoring sites projected to be in nonattainment or have maintenance problems in 2017 for the 2008 ozone NAAQS. Air quality modeling to assess the health and welfare benefits of the emissions reductions expected to result from this proposal is described in section
VIII . This section includes information on the air quality modeling platform used in support of the proposed rule with a focus on the base year and future b ase case emission inventories. We also provide the projection of 2017 ozone concentrations and the interstate contributions for 8

- hour ozone. The Air Quality Modeling Technical Support Document (AQM TSD) in the docket for this proposed rule contains more d etailed information on the air quality modeling aspects of this rule.
On August 4 , 2015, the EPA published a Notice of Data Availability ( 80 FR 46271 ) requesting comment on the air quality modeling platform and air quality modeling results that are being used for this proposed rule. Specifically, in the NODA, the EPA requested comment on the data and methodologies related to the 2011 and 2017 emissions and the air quality modeling to78

project 2017 concentrations and contributions. Comments received on that data via the NODA will be considered for the final rule.
A. Overview of Air Quality Modeling Platform The EPA performed air quality modeling for three em issions scenarios: a 2011 base year, a 2017 base line , and a 2017 illustrative control case that reflects the emission reductions expected from the proposed rule. 69 We selected 2011 as the base year to reflect the most recent National Emissions Inventory (NE I). In addition, the meteorological conditions during the summer of 2011 were generally conducive for ozone formation across much of the U.S., particularly the eastern U.S. For example, as described in the AQM TSD, an a nalysis of meteorological

- adjusted tr ends in seasonal mean ozone for the period 2000 through 2012 indicates that, on a regional basis, the summer of 2011 was typical , in terms of the presence of conditions conducive to ozone formation, of high ozone years in the e astern U.S. Additional analys es of meteorological conditions during the summer of 2011 in comparison to conditions during several other recent years can be found in the AQM TSD. The use of meteorological data representing conditions that are

69 The 2017 illustrative control case is relevant to the EPA’s policy analysis discussed in section VI and to the benefits and costs assessment discussed in section VII I of this preamble. It is not used to identify nonattainment or maintenance receptors or q uantify the contributions from upwind states to these receptors.79

conducive for ozone formation is consistent with the EPA’s modeling guidance for attainment demonstrations. 70 As noted above, we selected 2017 as the projected analysis year to coincide with the attainment date for moderate areas under the 2008 ozone NAAQS. We used the 2017 base line emissions in our air quality modeling to identify future nonattainment and maintenance locations and to quantify the contributions of emissions from upwind states to 8

- hour ozone concentrations at downwind locations. We used the air quality modeling of th e 2017 base line and 2017 illustrative control case emissions to estimate the air quality impacts and health benefits of this proposal. The EPA used the Comprehensive Air Quality Model with Extensions (CAMx) version 6.11 71 to simulate pollutant concentration s for the 2011 base year and the 2017 future year scenarios. CAMx is a grid cell

- based, multi

- pollutant photochemical model that simulates the formation and fate of ozone and fine particles in the atmosphere. The CAMx model contains certain probing tools i ncluding source apportionment

70 “Modeling Guidance for Demonstrating Attainment of Air Quality Goals for Ozone, PM2.5, and Regional Haze” U.S. Environmental Protection Agency, Research Triangle Park, NC. December 2014. ht tp://www.epa.gov/ttn/scram/guidance/guide/Draft_O3

- PM

RH_Modeling_Guidance

- 2014.pdf.

71 Comprehensive Air Quality Model with Extensions Version 6.11 User’s Guide. Environ International Corporation. Novato, CA. December, 2014.80

techniques that are designed to quantify the contribution of emissions from various sources and areas to ozone in other downwind locations. The CAMx model applications were performed for a modeling region (i.e., modeling domai n) that covers the contiguous 48 states , the District of Columbia, and adjacent portions of Canada and Mexico using a horizontal resolution of 12 x 12 km. A map of the air quality modeling domain is provided in the AQM TSD. The 2011

- based air quality model ing platform includes 2011 base year emissions and future year projections of these emissions and 2011 meteorology for air quality modeling with CAMx. In the remainder of this section, we provide an overview of (1) the 2011 and 2017 emissions inventories, (2) the methods for projecting future nonattainment and maintenance along with a list of 2017 base line nonattainment and maintenance receptors in the eastern U.S., (3) the approach to developing metrics to measure interstate contributions to 8

- hour ozone, and (4) the predicted interstate contributions to downwind nonattainment and maintenance in the eastern U.S. We also identify which predicted interstate contributions are at or above the CSAPR screening threshold, which we are proposing to apply for regula tion of interstate transport of ozone for purposes of the 2008 ozone standard
.81

B. Emission Inventories The EPA developed emission inventories for this proposal including emission estimates for EGUs, non

- EGU point sources, stationary nonpoint sources, onroad mobile sources, nonroad mobile sources, wild fires, prescribed fires, and for biogenic emissions that are not the result of human activities. The EPA’s air quality modeling relies on this comprehensive set of emission inventories because emissions f rom multiple source categories are needed to model ambient air quality and to facilitate comparison of model outputs with ambient
measurements. To prepare the emission inventories for air quality modeling, t he EPA processed the emission inventories using the Sparse Matrix Operator Kernel Emissions (SMOKE) Modeling System version 3. 6
. 5 to produce the gridded, hourly, speciated, model

ready emissions for input to the CAMx air quality model. Additional information on the development of the emission inventorie s and on data sets used during the emissions modeling process are provided in the TSD “Preparation of Emissions Inventories for the Version 6. 2 , 2011 Emissions Modeling Platform , ” hereafter known as the “ Emissions Modeling TSD . ” This TSD is available in th e docket for this rule and at http://www.epa.gov/ttn/chief/emch/index.html#2011.82

The EPA published Federal Register notices on November 27, 2013 (78 FR 70935) , and January 14, 2014 (79 FR 2437) , to take comment on the 2011 and 2018 72 emissi on modeling platforms , including d ata and documentation on the methods used to prepare the emission inventories for air quality modeling. C omments were collected for the 2011 and 2018 emissions modeling platforms under the dockets EPA

- HQ

- OAR

- 2013

- 0743 and EPA

- HQ

- OAR

- 2 013

- 0809, respectively. Comments from those notices that were accepted by the EPA have been incorporated into the emission modeling data and procedures for this proposal as documented in the Emissions Modeling TSD. As indicated above, t he updated emission inventories , methodologies, and data were provided in a Notice of Data Availability published in the Federal Register on August 4 , 2015 (80 FR 46271)
. Comments received on the proposal data will be considered for the final rule. 1. Foundation Emission Inve ntory Data Sets The EPA developed emission data representing the year 2011 to support air quality modeling of a base year from which future

72 During the 2013 and 2014 pre

- proposal comment periods for the modeling platforms, the attainment deadline for the downwind areas was established by regulation as December 2018. The 2008 Ozone NAAQS SIP Requirements Rule revised the attainment deadline for ozone nonattainment areas cu rrently designated as Moderate from December 2018 to July 2018, which means attainment determinations have to be based on design values calculated using 2015 through 2017 ozone season data. Therefore, in its July 2015 NODA and in this proposal, the EPA has adjusted the future year modeling to be for the year 2017 rather than 2018.83

air quality could be forecasted. The EPA used the 2011 National Emission Inventory (NEI) version 2 (2011NEIv2) , released in March 2015 , as the primary basis for the U.S. inventories supporting the 2011 air quality modeling. Documentation on the 2011NEIv 2 is available in the 2011 National Emissions Inventory, version 2 TSD available in the docket for this rule and at http://www.epa.gov/ttn/chief/net/2011inventory.html#inventorydoc

. The future base case scenario modeled for 201 7 includes a representation of changes in activity data and of predicted emission reductions from on - the

- books actions , including planned emissi on control installation s and promulgated federal measures that affect anthropogenic emissions
. 73 2. Development of Emission Inventories for EGUs
A nnual NO X and SO 2 emissions for EGUs in the 2011NEIv 2 are based primarily on data from continuous emission monitoring systems (CEMS), with other EGU pollutants estimated using emission factors and annual heat input data reported to the EPA. For EGUs without CEMS, the EPA used data submitted to the NEI by the states. For more information on the details of how the 2011 EGU emissions were developed and prepared for air quality modeling, see the Emissions Modeling TSD.

73 Biogenic emissions and emissions from wild fires and prescribed fires were held constant between 2011 and 2017 since (1) these emissions are tied to the 2011 meteorological conditions and (2) the focus of this rule is on the contribution from anthropogenic emissions to projected ozone nonattainment and maintenance.84

The EPA projected future 201 7 base line EGU emissions using version 5.1 4 of the Integrated Plann ing Model (IPM) ( http://www.epa.gov/powersectormodeling ). IPM, developed by ICF Consulting, is a state

- of

- the

- art, peer

- reviewed, multi

regional, dynamic, deterministic linear programming model of the contiguous U.S. electric power sector. It provides fore casts of least cost capacity expansion, electricity dispatch, and emission control strategies while meeting energy demand and environmental, transmission, dispatch, and reliability constraints. EPA has used IPM for over two decades to better understand pow er sector behavior under future business

- as - usual conditions and to evaluate the economic and emission impacts of prospective environmental policies. The model is designed to reflect electricity markets as accurately as possible. The EPA uses the best avai lable information from utilities, industry experts, gas and coal market experts, financial institutions, and government statistics as the basis for the detailed power sector modeling in IPM. The model documentation provides additional information on the as sumptions discussed here as well as all other model assumptions and inputs. 74

74 Detailed information and documentation of EPA’s Base Case, including all the underlying assumptions, data sources, and architecture parameters can be found on EPA’s website at: www.epa.gov/airmarkets/powersectormodeling
.85

The IPM version 5.14 base case accounts for comments received as a result of the NODAs released in 2013 and 2014 (including control configuration) as well as updated environmental regulations. Th is projected base case accounts for the effects of the finalized MATS 75 and CSAPR rules, New Source Review settlements , and on - the

- books state rules through 2014 76 impacting SO 2 , NO X , directly emitted particulate matter , and CO 2 , and final actions the EPA has taken to implement the Regional Haze Rule. The EPA’s IPM base case also includes two federal

non - air rules affecting EGUs: the Cooling Water Intake Structure ( Clean Water Act section 316(b)) r ule and the Coal Combustion Resid uals (CCR) rule
. Documentation of IPM version 5.1 4 is in the docket and available online at www.epa.gov/powersectormodeling
. A fter the receptor and contribution analyses for this proposal were underway, the EPA released an updated IPM base case, version 5. 15, and the final Clean Power Plan (CPP). 77 In order to reflect all on

- the

- books policies as well as the most

75 In Michigan v. EPA , the Supreme Court reversed on narrow grounds a portion of the D.C. Circuit decision upholding the MATS rule, finding that EPA erred by not considering cost when determining that regulation of EGUs was "appropriate" pursuant to CAA section 112(n)(1). 135 S.Ct. 192 (2015). The case was remanded to the D.C. Circuit for further proceedings , and the MATS rule currently remains in place.

76 For any specific version of IPM there is a cutoff date after which it is no longer possible to incorporate updates into the input databases. For version 5.14, that cutoff date was N ovember 2014.

77 [Placeholder for CPP reference once published]86

current power sector modeling data, the EPA performed an assessment , described in section V

- D below, to reflect inclusion of IPM 5.15 with the CPP in th e base case for this proposal. The EPA will use this base case, including the final CPP , for its modeling analysis for the final rule. Additionally, EPA’s analysis for the final rule may include updated assumptions about CSAPR p hase 2 NO X ozone - season or SO 2 annual emissions budgets for those states with budgets that were declared invalid and remanded to the EPA by the D.C. Circuit’s decision in EME Homer City II
. In projecting future 2017 base line EGU emissions, the EPA adjusted the 2018 IPM version 5.14 base case results to account for three categories of differences between 2017 and 2018. The categories are: 1) adjusting NO X emissions for units with SCRs in 2018 but that are assumed not to operate or be installed in 2017; 2) adding NO X emissions for units that are retiring in 2018 but are projected to operate in 2017; and 3) adjusting NO X emissions for coal

- fired units that are projected to convert to natural gas (i.e., “coal

- to

- gas”) in 2018, but are still
pro j ected to burn coal in 2017. These adjustments were only made to the air q uality flat file outputs of IPM and are discussed in greater detail in the IPM documentation found in the docket for this proposed rule
.87

3. Development of Emission Inventories for Non

- EGU Point Sources The 2011 non

- EGU point sources in the 2011 base case inventory match those in the 2011NEIv 2 . Details on the development of the 2011 emission inventories can be found in the 2011NEIv 2 TSD. Prior to air quality modeling, the emission inventories must be proc essed into a format that is appropriate for the air quality model to use. Details on the processing of the emissions for 2011 and on the development of the 201 7 non EGU emission inventories are available in the Emissions Modeling TSD. Projection factors an d percent reductions in this proposal reflect comments received as a result of the NODAs in 2013 and 2014 , along with emission reductions due to national and local rules, control programs, plant closures, consent decrees and settlements. Reductions from se veral Maximum Achievable Control Technology (MACT) and National Emission Standards for Hazardous Air Pollutants (NESHAP) standards are included. Projection approaches for corn ethanol and biodiesel plants, refineries and upstream impacts represent requirem ents pursuant to the Energy Independence and Security Act of 2007 (EISA). For aircraft emissions at airports, the EPA developed projection factors based on activity growth projected by the Federal Aviation Administration Terminal Area Forecast (TAF) system, published in March 2013.88

Point source and nonpoint oil and gas emissions are projected to 2018 using regional p rojection factors by product type using Annual Energy Outlook (AEO) 201 4 projections to year 201 7
. NO X and VOC reductions that are co

- benefits to the NESHAP and New Source Performance Standards (NSPS) for Stationary Reciprocating Internal Combustion Engine s (RICE ) are reflected for select source categories. In addition, Natural Gas Turbines and Process Heaters NSPS NO X controls and NSPS Oil and Gas VOC controls are reflected for select source categories. 4. Development of Emission Inventories for Onroad Mo bile Sources The EPA developed the onroad mobile source emissions for states other than California using the EPA’s Motor Vehicle Emissions Simulator (MOVES) 2014
. We computed the emissions within SMOKE by multiplying emission factors developed using
MOVES with the appropriate activity data. We also used MOVES emission factors to estimate emissions from refueling. The 2011 onroad mobile source emissions used in the inventory for this rule are similar but not identical to the 2011NEIv 2 emissions due to a more detailed treatment of E

- 85 emissions in the 2011 emission modeling platform used for this rule . Additional information on the approach for generating the onroad mobile source emissions is available in the Emissions Modeling TSD. Onroad mobile source emissions for California are consistent89

with the emissions submitted by the state as reflected in the 2011NEIv 2
. In the future

- year modeling for mobile sources, we included all national measures known at the time of modeling. The future scenarios f or mobile sources reflect projected changes to fuel
usage and onroad mobile control programs finalized as of the date of the model run. Finalized rules that are incorporated into the mobile source emissions include: Tier 3 Standards (March 2014), the Light

- Duty Greenhouse Gas Rule (March 2013), Heavy (and Medium)

- Duty Greenhouse Gas Rule (August 2011), the Renewable Fuel Standard (February 2010), the Light Duty Greenhouse Gas Rule (April 2010), the Corporate

- Average Fuel Economy standards for 2008

- 2011 (Apr il 2010), the 2007 Onroad Heavy

- Duty Rule (February 2009), and the Final Mobile Source Air Toxics Rule (MSAT2) (February 2007). Impacts of rules that were in effect in 2011 are reflected in the 2011 base year emissions at a level that corresponds to the ex tent to which each rule had penetrated into the fleet and fuel supply by the year 2011
. L ocal control programs such as the California LEV III program are included in the onroad mobile source emissions
. A ctivity data for onroad mobile sources was projected using AEO 2014. Because EPA changed the model year from 2018 to 2017 between its
pre - proposal modeling and the modeling conducted for this proposal (see footnote 64), and due to the substantial amount of90

lead time required to generate emissio n factors with MOVES, the EPA was unable to direct ly generate emission factors for 2017 prior to the modeling used to support this proposed rule
. Therefore, f or this proposal, f uture year onroad mobile source emissions were computed for 2018 and adjusted t o 2017 levels using adjustment factors derived from national MOVES runs for 2017 and 2018. Emission factors will be generat ed directly for 2017 prior to air quality modeling for the final rule. 5. Development of Emission Inventories for Commercial Marine Category 3 ( Vessel ) The commercial marine category 3 vessel (“C3 marine”) emissions in the 2011 base case emission inventory for this rule

are consistent with those in the 2011NEI v2
. These emissions reflect reductions associated with the Emissions Control Area proposal to the International Maritime Organization control strategy (EPA

- 420

- F

- 10

- 041, August 2010); reductions of NO X , VOC, and CO emissions for new C 3 engines that went into effect in 2011; and fuel sulfur limits that went in to effect as early as 2010. The cumulative impacts of these rules through 2017 are incorporated in the 2017 projected emissions for C3 marine

sources. 6. Development of Emission Inventories for Other Nonroad Mobile
Sources91

To develop the nonroad mobile sou rce emission inventories other than C 3 marine for the modeling platform , t he EPA used monthly, county, and process level emissions output from the National Mobile Inventory Model (NMIM) (see http://www.epa.gov/otaq/nmim.htm) . State

- submitted emissi ons data for nonroad sources were used for Texas and California. These emissions are consistent with those in the 2011NEIv2. The EPA also used NMIM to project nonroad mobile emissions for future years. Development of the future year nonroad emissions requi re a substantial amount of lead time and the emissions were prepared for the year 2018 before the model year

was changed to 2017 when the attainment date was revised in the 2008 Ozone NAAQS SIP Requirements Rule
. To develop a 2017 nonroad emissions invento ry for this proposal that account ed for the difference between 2017 and 2018 emissions levels , we calculated the nonroad emissions for 201 8 , and then adjusted th os e emissions to 2017 levels using national adjustment factors derived from national NMIM runs for 2017 and 2018
. Emissions specific to 2017 will be developed for the modeling that will support the final rule. The n onroad mobile emission control
programs include reductions to locomotives, diesel engines and marine engine s , along with standards for f uel sulfur content and evaporative emissions. A comprehensive list of control programs92

included for mobile sources is available in the Emissions Modeling TSD. 7. Development of Emission Inventories for Nonpoint Sources The emissions for stationary nonpoint sources in our 2011 base case emission inventory are largely consistent with those in the 2011NEIv 2 . For more information on the nonpoint sources in the 2011 base case inventory , see the Emissions Modeling TSD and the 2011NEIv 2 TSD. Where states provided EPA with information about projected control measures or changes in nonpoint source emissions, t he
EPA incorporated those inputs in its projections . We included adjustments for state fuel sulfur content rules for fuel o il in the N ortheast. Projected emissions for p ortable fuel container s reflect the impact of projection factors required by the final Mobile Source Air Toxics (MSAT2) rule and the EISA, including updates to cellulosic ethanol plants, ethanol transport worki ng losses, and ethanol distribution vapor losses. The EPA developed regional projection factors for nonpoint oil and gas sources by product type based on Annual Energy Outlook (AEO) 201 4 projections to year 201 8 . We reflected criteria air pollutant ( CAP ) co - benefit reductions resulting from the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Reciprocating Internal Combustion Engines (RICE) and NSPS rule s and Oil and Gas NSPS VOC controls93

for select source categories. Additional detail s on the projections are available in the Emissions Modeling TSD. C. Air Quality Modeling to Identify Nonattainment and Maintenance Receptors In this section, we describe the air quality modeling performed to identify locations where we expect there to be nonattainment or maintenance problems for the 2008 8

- hour ozone NAAQS in the 2017 analytic future year chosen for this proposal. We then describe how we factored current monitored data into the identification of sites as having either nonattainment or main tenance concerns for the purposes of this rulemaking
. These sites are used as the “receptors” for quantifying the contributions of emissions in upwind states to nonattainment and maintenance concerns in downwind locations. In this proposed rule, the EPA i s relying on CSAPR’s approach to identify separate nonattainment and maintenance receptors in order to give independent effect to both the “contribute significantly to nonattainment” and the "interfere with maintenance" prongs of section 110(a)(2)(D)(i)(I) , consistent with the D.C. Circuit’s direction in North Carolina
. 78 In its decision on remand from the Supreme Court, the D.C. Circuit confirmed that EPA’s approach to identifying maintenance

78 531 F.3d at 910

- 911 (holding that the EPA must give “independent significance” to each prong of CAA section 110(a)(2)(D)(i)(I)).94

receptors in CSAPR comported with the court’s prior instruction
t o give independent meaning to the “interfere with maintenance” prong in the good neighbor provision. EME Homer City II , 795 F.3d at 136
. In CSAPR, the EPA identified nonattainment receptors as those monitoring sites that are projected to have average design values that exceed the NAAQS
. T he EPA separately identified maintenance receptors as those receptors that would have difficulty maintaining the relevant NAAQS in a scenario that takes into account historic al variability in air quality at that recept or. The CSAPR approach for identifying nonattainment and maintenance receptors relied only upon air quality model projection s of measured design values. In CSAPR, if the average design value in the analysis year was projected to exceed the NAAQS, then the monitoring site is identified as a nonattainment receptor without consideration of whether the monitoring site is currently measuring “clean data” (i.e., design values below the NAAQS based on the most recent three years of measured data). In prior transpo rt rulemakings, such as the NO X SIP Call and CAIR, the EPA defined nonattainment receptors as those areas that both currently monitor nonattainment and that the EPA projects will95

be in nonattainment in the future compliance year. 79 We explained that we had the most confidence in our projections of nonattainment for those counties that also measure nonattainment for the most recent period of available ambient data. In CSAPR,

we were compelled to deviate from this practice of incorporating monitored data into EPA’s evaluation of projected nonattainment receptors because the most recent monitoring data then available reflected large emission reductions from CAIR, which CSAPR was designed to replace. As recently affirmed by the D.C. Circuit, i t was therefore reas onable for the EPA to decide not to compare monitored data reflecting CAIR emissions reductions to its modeling projections that instead excluded CAIR from its baseline. 80 As the EPA is not replacing an existing transport program in this rule proposal, we are proposing to consider current monitored data as part of the process for identifying projected nonattainment receptors for this rulemaking. Accordingly, in this rule, the EPA is proposing to return to our prior practice of comparing our modeled nonattai nment projections to current monitored air quality. For the purposes of this rulemakin g , the EPA proposes to identify as nonattainment receptors those

79 63 FR at 57375, 57377; 70 FR at 25241. See also North Carol ina , 531 F.3d at 913

- 914 (affirming as reasonable EPA’s approach to defining nonattainment in CAIR). 80 EME Homer City II , 795 F.3d at 135

- 36 ; see also 76 FR at 48230

- 31.96

monitors that both currently measure nonattainment and that the EPA projects will be in nonattainment in 2017.
As noted above, in CSAPR the EPA identified maintenance receptors as those receptors that would have difficulty maintaining the relevant NAAQS in a scenario that takes into account historic al variability in air quality at that receptor. The variability in air quality was determined by evaluating the “maximum” future design value at each receptor based on a projection of the maximum measured design value over the relevant period. The EPA inter prets the projected maximum future design value to be a potential future air quality outcome consistent with the meteorology that yielded maximum measured concentrations in the ambient data set analyzed for that receptor. The EPA also recognizes that previ ously experienced meteorological conditions (e.g., dominant wind direction, temperatures, air mass patterns) promoting ozone formation that led to maximum concentrations in the measured data may reoccur in the future. The maximum design value gives a reaso nable projection of future air quality at the receptor under a scenario in which such conditions do, in fact, reoccur. The projected maximum design value is used to identif y upwind emissions that, under those circumstances, could interfere with the downwin d area's ability to maintain the NAAQS. Therefore,97

the EPA assesses the magnitude of the maximum projected design value for 2017 at each receptor in relation to the 2008 ozone NAAQS and, where such a value exceeds the NAAQS, EPA determines that receptor to be a “maintenance” receptor for purposes of defining interference with maintenance in this proposal, consistent with the method used in CSAPR and upheld by the D.C. Circuit in EME Homer City II
. 81 That is, monitoring sites with a maximum design value that exceeds the NAAQS are projected to have a maintenance problem in 2017. Consistent with the CSAPR methodology, monitoring sites with a projected maximum design value that exceeds the NAAQS , but with a projected average design value that is below the NAAQS, are identified as maintenance

- only receptors. In addition, those sites that are currently measuring clean data, but are projected to be nonattainment based on the average design value and that , by definition, are projected to have a maximum design v alue above the standard are also identified as maintenance

- only receptors
. We are not proposing that monitored data have any effect on the EPA’s determination of maintenance receptors using the CSAPR method since even those receptor sites that are not curr ently monitoring violations are still subject

81 See 795 F.3d at 136
.98

to conditions that may allow violations to reoccur and therefore have future maintenance concerns. The following is a brief summary of the procedures for projecting future

- year 8

- hour ozone average and maximum design values to 2017 . Consistent with the EPA’s modeling guidance we use the air quality modeling results in a “relative” sense to project future concentrations. That is, the ratios of future year model predictions to base year model predictions are use d to adjust ambient ozone design values 82 up or down depending on the relative (percent) change in model predictions for each location. The modeling guidance recommends using measured ozone concentrations for the 5

- year period centered on the base year
as t he air quality data starting point for future year projections. This average design value is used to dampen the effects of inter

- annual variability in meteorology on ozone concentrations and to provide a reasonable projection of future air quality at the r eceptor under "average" conditions. Because the base year for this proposal is 2011, we are using the base period 2009

- 2013 ambient ozone design value data in order to project 2017 average design values in a manner consistent with the modeling guidance.

82 The ozone design value at a particular monitoring site is the 3

- year average of the annual 4th highest daily maximum 8

- hour ozone concentration at that site.99

T he approach for projecting future ozone design values involved the projection of an average of up to 3 design value periods, which include the years 2009

- 2013 (design values for 2009

- 2011, 2010

- 2012, and 2011

- 2013). The 2009

– 2011, 2010

- 2012, and 2011

- 2013 design values are accessible at www.epa.gov/airtrends/values.html . The average of the 3 design values creates a “5

- year weighted average” value. The 5

- year weighted average values were then projected to 2017. To project 8

- hour ozone design values we used the 2011 base year and 2017 future base

- case model

- predicted ozone concentrations to calculate relative reduction factors (RRFs) for the location of each monitoring site. The RRFs were applied to the 2009

- 2013 average ozone design values and the individual design values for 2009

- 2011, 2010

- 2012, and 2011

- 2013 through the following steps: Step 1 : For each monitoring site, we calculate the average concentration across the 10 days with the 10 highest 8

- hour daily maximum ozone predictions in the 2017 base line 83 using the predictions in the nine grid cells that include or surround the location of the monitoring site. The RRF for a site is the ratio of the mean prediction in the future year to the mean pr ediction

83 As specified in the attainment demonstration modeling guidance, if there are fewer than 10 mo deled days greater than or equal to (>=) 70 ppb, then the threshold is lowered in 1 ppb increments (to as low as 60 ppb) until there are 10 days. If there are fewer than 5 days >= 60 ppb, then an RRF calculation is not completed for that site.100

in the 2011 base year. The RRFs were calculated on a site

- by

site basis. 84 Step 2 : The RRF for each site is then multiplied by the 2009

- 2013 5

- year weighted average ambient design value for that site, yielding an estimate of the future average des ign value at that particular monitoring location. Step 3 : We calculate the maximum future design value by multiplying the RRF for each site by the three base periods (2009

- 201 1 , 2010

- 2012, and 2011

- 2013) separately. The highest of the three future values is the projected maximum design value. Consistent with the truncation and rounding procedures for the 8

- hour ozone NAAQS, the projected design values are truncated to integers in units of ppb
. 85 Projected design values that are greater than or equal to 76 ppb are considered to be violating the NAAQS in 2017. For those sites that are projected to be violating the NAAQS based on the average design values in 2017 , we examined measured design values f or the period 2012

- 2014 , which is the most recent available measured design values at the time of this proposal. As noted above, we are proposing to identify nonattainment receptors in this rulemaking as those sites that are violating

84 Sites wit h insufficient valid design values were not included in the calculation. In addition, sites with fewer than 5 days with predicted 8

- hour ozone >= 60 ppb in 2018 were dropped from the analysis. 85 40 CFR Part 50, Appendix P to Part 50

– Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone.101

the NAAQS based on cu rrent measured air quality and also have projected average design values of 76 ppb or greater. Maintenance

- only receptors therefore include both (1) those sites with projected average design values above the NAAQS that are currently measuring clean data an d (2) those sites with projected average design values below the level of the NAAQS, but with projected maximum design values of 76 ppb or greater. In addition to the maintenance

- only receptors, t he 2017 ozone nonattainment receptors are also maintenance r eceptors because the maximum design values for each of these sites is always greater than or equal to the average design value
. The monitoring sites that we project to be nonattainment and maintenance receptors for the ozone NAAQS in the 2017 base line

are used for assessing the contribution of emissions in upwind states to downwind nonattainment and maintenance of ozone NAAQS as part of this proposal. Table V.C

- 1 contains the 2009

- 2013 base period average and maximum 8

- hour ozone design values, the 2017 ba se line average and maximum design values, and the 2012

- 2014 design values for the 8 sites in the eastern U.S. projected to be 2017 nonattainment receptor s . Table V.C

- 2 contains this same information for the 6 maintenance

- only sites in the eastern U.S. that are projected nonattainment but currently measuring clean data
. Table V.C

- 3 contains this same information for the 23102

maintenance

- only sites in the eastern U.S. that are projected to have average design values below the NAAQS, but maximum design values ab ove the NAAQS. The design values for all monitoring site s in the U.S. are provided in docket item EPA

- HQ

- OAR

- 2015

- 0500

- 0006. Additional details on the approach for projecting average and maximum design values are provided in the modeling guidance, Model Attainment Test Software 86 documentation, and the AQM TSD. The EPA is seeking comment on the proposed methods for determining projected nonattainment and maintenance receptors. Table V.C - 1. Average and Maximum 2009 - 2013 and 2017 Base line 8 - Hour Ozone Design Values and 2012 - 2014 Design Values (ppb) at Projected Nonattainment Sites in the Eastern U.S. (Nonattainment Receptors)

Monitor ID State County Average Design Value 2009

- 2013 Maximum

Design Value 2009

- 2013 Average

Design Value 2017 Maximum

Design Value 2017 2012

-

2014 Design Value 90013007 Connecticut Fairfield 84.3 89.0 77.1 81.4 84.0 90019003 Connecticut Fairfield 83.7 87.0 78.0 81.1 85.0 90099002 Connecticut New Haven 85.7 89.0 77.2 80.2 81.0 480391004 Texas Brazoria 88.0 89.0 81.4 82.3 80.0 481210034 Texas Denton 84.3 87.0 76.9 79.4 81.0 484392003 Texas Tarrant 87.3 90.0 79.6 82.1 77.0 484393009 Texas Tarrant 86.0 86.0 78.6 78.6 80.0 551170006 Wisconsin Sheboygan 84.3 87.0 77.0 79.4 81.0

Table V.C - 2. Average and Maximum 2009 - 2013 and 2017 Base line 8 - Hour Ozone Design Values and 2012 - 2014 Design Values (ppb) at Sites in the Eastern U.S. that are Projected Nonattainment but Currently Measuring Clean Data (Maintenance - Only Receptors)

86 Abt Associates, 2014. User’s Guide: Modeled Attainment Test Software. http://www.epa.gov/scram001/modelingapps_mats .htm103 Monitor ID State County Average Design Value 2009

- 2013 Maximum

Design Value 2009

- 2013 Average

Design Value 2017 Maximum

Design Value 2017 2012

-

2014 Design Value 240251001 Maryland Harford 90.0 93.0 81.3 84.0 75.0 360850067 New York Richmond 81.3 83.0 76.3 77.8 73.0 361030002 New York Suffolk 83.3 85.0 79.2 80.8 73.0 390610006 Ohio Hamilton 82.0 85.0 76.3 79.1 75.0 482011034 Texas Harris 81.0 82.0 76.8 77.8 72.0 482011039 Texas Harris 82.0 84.0 78.2 80.2 72.0

Table V.C - 3. Average and Maximum 2009 - 2013 and 2017 Base line 8 - Hour Ozone Design Values and 2012 - 2014 Design Values (ppb) at Projected Maintenance Sites in the Eastern U.S. Based on the CSAPR Method ology (Maintenance - Only Receptors)104 Monitor ID State County Average Design Value 2009

- 2013 Maximum

Design Value 2009

- 2013 Average

Design Value 2017 Maximum

Design Value 2017 2012

- 2014

Design Value 90010017 Connecticut Fairfield 80.3 83.0 75.8 78.4 82.0
211110067 Kentucky Jefferson 82.0 85.0 75.8 78.6 Incomplete Data 211850004 Kentucky Oldham 82.0 86.0 73.7 77.3 74.0 240053001 Maryland Baltimore 80.7 84.0 73.2 76.2 72.0 260050003 Michigan Allegan 82.7 86.0 75.5 78.5 83.0 261630019 Michigan Wayne 78.7 81.0 74.0 76.2 74.0 340071001 New Jersey Camden 82.7 87.0 74.2 78.1 76.0 340150002 New Jersey Gloucester 84.3 87.0 75.1 77.5 76.0 340230011 New Jersey Middlesex 81.3 85.0 73.0 76.3 74.0 340290006 New Jersey Ocean 82.0 85.0 73.9 76.6 75.0 360810124 New York Queens 78.0 80.0 75.7 77.6 72.0 420031005 Pennsylvania Allegheny 80.7 82.0 75.3 76.5 77.0 421010024 Pennsylvania Philadelphia 83.3 87.0 75.1 78.4 75.0 480850005 Texas Collin 82.7 84.0 74.9 76.0 78.0 481130069 Texas Dallas 79.7 84.0 74.0 78.0 78.0 481130075 Texas Dallas 82.0 83.0 75.8 76.7 77.0 481211032 Texas Denton 82.7 84.0 75.1 76.3 79.0 482010024 Texas Harris 80.3 83.0 75.9 78.5 72.0 482010026 Texas Harris 77.3 80.0 73.5 76.1 67.0 482010055 Texas Harris 81.3 83.0 75.4 77.0 75.0 482011050 Texas Harris 78.3 80.0 74.6 76.2 72.0 484390075 Texas Tarrant 82.0 83.0 75.5 76.4 79.0 484393011 Texas Tarrant 80.7 83.0 74.5 76.6 75.0

D. Pollutant Transport from Upwind States 1. Air Quality Modeling to Quantify Upwind State Contributions This section documents the procedures the EPA used to quantify the impact of emissions from specific upwind states on 2017 8

- hour design values for identified downwind nonattainment and maintenance receptors . The EPA used CAMx photochemical105

source apportionment modeling to quantify the impact of emissions in specific upwind states on downwind non attainment and maintenance receptors for 8

- hour ozone. CAMx employs enhanced source apportionment techniques that track the formation and transport of ozone from specific emissions sources and calculates the contribution of sources and precursors to

ozone for individual receptor locations. The strength of the photochemical model source apportionment technique is that all modeled ozone at a given receptor location in the modeling domain is tracked back to specific sources of emissions and boundary conditions to fully characterize culpable sources. The EPA performed nationwide, state

- level ozone source apportionment modeling using the CAMx Ozone Source Apportionment Technology/Anthropogenic Precursor Culpability Analysis ( OSAT/APCA) technique 87 to quantify the contribution of 2017 base line NO X and VOC emissions from all sources in each state to projected 2017 ozone concentrations at air quality monitoring sites. In the source apportionment model run, we tracked the ozone formed from each of the following contrib ution categories (i.e., “tags”):

87 As part of this technique, ozone formed from reactions between biogenic VOC and NO x with anthropogenic NO x and VOC are assigned to the anthropogenic emissions.106

 States

– anthropogenic NO X and VOC emissions from each state tracked individually (emissions from all anthropogenic sectors in a given state were combined);

 Biogenics

– biogenic NO X and VOC emissions domain

- wide (i.e., not by state);

 Boundary Concentrations

– concentrations transported into the modeling domain;

 Tribes

– the emissions from those tribal lands for which we have point source inventory data in the 2011 NEI (we did not mod el the contributions from individual tribes);

 Canada and Mexico

– anthropogenic emissions from sources in the portions of Canada and Mexico included in the modeling domain (we did not model the contributions from Canada and Mexico separately);

 Fires

– com bined emissions from wild and prescribed fires domain

- wide (i.e., not by state) ; and

 Offshore

– combined emissions from offshore marine vessels and offshore drilling platforms. The contribution modeling provided contributions to ozone from anthropogenic NO X and VOC emissions in each state, individually. The contributions to ozone from chemical reactions between biogenic NO X and VOC emissions we re modeled and assigned to the

“ biogenic ” category. T he contributions from wild fire and107

prescribed fire NO X and VOC emissions were modeled and assigned to the “ fires ” category. That is, the contributions from the

“ biogenic ” and “ fires ” categories are not assigned to individual
states nor are they included in the state contributions
. The CAMx OSAT/APCA model ru n was performed for the period May 1 through September 30 using the projected 2017 base line emissions and 2011 meteorology for this time period. The hourly contributions 88 from each tag were processed to obtain the 8

- hour average contributions corresponding to the time period of the 8

- hour daily maximum concentration on each day in the 2017 model simulation. This step was performed for those model grid cells containing moni toring sites in order to obtain 8

- hour average contributions for each day at the location of each site. The model

- predicted contributions were then applied in a relative sense to quantify the contributions to the 2017 average design value at each site. The resulting 2017 contributions from each tag to each monitoring site in the eastern and western U.S. along with additional details on the source apportionment modeling and the procedures for calculating contributions can be found in the AQM TSD. The EPA is seeking comment on the methodologies for calculating ozone contributions.

88 Contributions from anthropogenic emissions under “NO X - limited” and “VOC

- limited” chemical regimes were combined to obtain the net contribution from NO X and VOC anthropogenic emissions in each state.108

The average contribution metric is intended to provide a reasonable representation of the contribution from individual states to the projected 2017 design value, based on modeled
tra nsport patterns and other meteorological conditions generally associated with modeled high ozone concentrations at the receptor. An average contribution metric constructed in this manner is beneficial since the magnitude of the contributions is directly re lated to the magnitude of the design value at each site. The largest contribution from each state in the East to 8

- hour ozone nonattainment receptors in downwind states is provided in Table V.D

- 1. The largest contribution from each state in the East to 8

- hour ozone maintenance

- only receptors in downwind states is also provided in Table V.D

- 1. Table V.D - 1. Largest Contribution to Downwind 8 - Hour Ozone Nonattainment and Maintenance Receptors for Each State in the Eastern U.S.

Upwind

State Largest

Downwind Contribution to Nonattainment Receptors for Ozone (ppb) Largest

Downwind Contribution to Maintenance Receptors for Ozone (ppb AL 0.79 1.28 AR 0.98 2.15 CT 0.00 0.46 DE 0.37 2.23 DC 0.06 0.73 FL 0.54 0.72 GA 0.47 0.58109 Upwind State Largest

Downwind Contribution to Nonattainment Receptors for Ozone (ppb) Largest

Downwind Contribution to Maintenance Receptors for Ozone (ppb IL 17.48 23.17 IN 6.24 14.95 IA 0.61 0.85 KS 0.80 1.03 KY 0.75 11.17 LA 3.09 4.23 ME 0.00 0.08 MD 2.07 7.11 MA 0.10 0.37 MI 2.69 1.79 MN 0.40 0.47 MS 0.78 1.48 MO 1.63 3.69 NE 0.24 0.36 NH 0.02 0.07 NJ 8.84 12.38 NY 16.96 17.21 NC 0.55 0.93 ND 0.11 0.28 OH 2.18 7.92 OK 1.70 2.46 PA 9.39 15.93 RI 0.02 0.08 SC 0.16 0.21 SD 0.08 0.12 TN 0.51 1.67 TX 2.44 2.95 VT 0.01 0.05 VA 1.87 5.29 WV 0.95 3.11 WI 0.34 2.59110

2. Application of Screening Threshold The EPA then evaluated the magnitude of the contributions from each upwind state to downwind nonattainment and maintenance receptors. In this proposal, the EPA uses an air quality screening threshold to identify upwind states that contribute to downwind ozone concentrations in amounts sufficient to “link” them to these to downwind nonattainment and maintenance receptors. As discussed above in section III , the EPA is proposing to establish the air quality screening threshold calculated as one percent of the NAAQS. Specifically for this rule, we propose calculating an 8

- hour ozone value for this air quality threshold of 0.75 ppb as the quantification of one percent of the 2008 ozone NAAQS.
States in the East 89 whose contributions to a specific receptor meet or exceed the screening threshold are considered linked to that receptor; those states’ ozone contributions and emissions (and available emission reductions) are analyzed

89 As discussed in section III this assessment shows that there are problem receptors in the West where western states contribute amounts g reater than or equal to the screening threshold used to evaluate eastern states (i.e., 1 percent of the NAAQS). However, there may be additional criteria to evaluate regarding transported air pollution in the West and upwind state obligations . The EPA prop oses to focus this rulemaking on eastern states, but seeks comment on whether to include western states in this rule.111

further, as described in section VI, to determine whether and what emissions reductions might be required from each state. States in the East w hose contributions are below the threshold are not included in the proposed rule and are considered to make insignificant contributions to projected downwind air quality problems. However, for eastern states for which the EPA is not proposing FIPs in this action, the EPA notes that updates to the modeling for the final rule could change the analysis as to which states have contributions that meet or exceed the screening threshold. In the event that air quality modeling conducted for the final rule demonstra tes that states that contribute amounts below the threshold in the proposal are projected to contribute amounts greater than or equal to the threshold in the final rule modeling , the EPA instead proposes to finalize revised budgets (presented with this rulemaking for comment) for whichever of those states may be identified as linked to such air quality problems. The EPA has calculated emissions budgets for all eastern states that we are proposing to apply to those states if, and only if, the final rule air quality modeling identifies a linkage as just described
. T hese budgets are available in the Ozone Transport Policy Analysis TSD
. Based on the maximum downwind contributions in T able V.D

- 1, the following states contribute at or above the 0.75 ppb112

threshold to downwind nonattainment receptors: Alabama, Arkansas, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Michigan, Mississippi, Missouri, New Jersey, New York, Ohio, Ok lahoma, Pennsylvania, Texas, Virginia, and West Virginia. Based on the maximum downwind contributions in Table
V.D

- 1, the following states contribute at or above the 0.75 ppb threshold to downwind maintenance

- only receptors: Alabama, Arkansas, Delaware, Il linois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Virginia, West Virginia, and Wisconsin. The linkages between each upwind st ate and downwind nonattainment receptors and maintenance

- only receptors in the eastern U.S. are provided in Table V.D

- 2 and Table V.D

- 3, respectively. Table V.D - 2 . Linkages between Each Upwind State and Downwind Nonattainment Receptors in the Eastern U.S. Upwind State Downwind Nonattainment Receptors

AL Tarrant Co, TX (484392003) AR Brazoria Co, TX (480391004) Tarrant Co, TX (484392003) Tarrant Co, TX (484393009) IL Brazoria Co, TX (480391004) Sheboygan Co, WI (551170006) IN Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) Sheboygan Co, WI (551170006) KS Sheboygan Co, WI (551170006) KY Sheboygan Co, WI (551170006)113

Upwind State Downwind Nonattainment Receptors

LA Brazoria Co, TX (480391004) Denton Co, TX (481210034) Tarrant Co, TX (484392003) Tarrant Co, TX (484393009) Sheboygan Co, WI (551170006) MD Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002)

MI Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002) Sheboygan Co, WI (551170006) MS Brazoria Co, TX (480391004) MO Brazoria Co, TX (480391004) Sheboygan Co, WI (551170006) NJ Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002) NY Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002)

OH Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002) Sheboygan Co, WI (551170006)

OK Denton Co, TX (481210034) Tarrant Co, TX (484392003) Tarrant Co, TX (484393009) Sheboygan Co, WI (551170006) PA Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002) TX Sheboygan Co, WI (551170006) VA Fairfield Co, CT (90013007) Fairfield Co, CT (90019003) New Haven Co, CT (90099002) WV Fairfield Co, CT (90013007) Fairfield Co, CT (90019003)114

Table V.D - 3 . Linkages between Each Upwind States and Downwind Maintenance - Only Receptors in the Eastern U.S. Upwind State Downwind Nonattainment Receptors

AL Hamilton Co, OH (390610006) Harris Co, TX (482010055)

AR Oldham Co, KY (211850004) Allegan Co, MI (260050003) Dallas Co, TX (481130069) Dallas Co, TX (481130075) Harris Co, TX (482010026) Harris Co, TX (482010055) Harris Co, TX (482011039) Harris Co, TX (482011050) Tarrant Co, TX (484390075) Tarrant Co, TX (484393011)

DE Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Ocean Co, NJ (340290006) Philadelphia Co, PA (421010024)

IL Jefferson Co, KY (211110067) Oldham Co, KY (211850004) Allegan Co, MI (260050003) Wayne Co, MI (261630019) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Suffolk Co, NY (361030002) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) Harris Co, TX (482010026) Harris Co, TX (482011039)

IN Jefferson Co, KY (211110067) Oldham Co, KY (211850004) Baltimore Co, MD (240053001) Harford Co, MD (240251001) Allegan Co, MI (260050003) Wayne Co, MI (261630019) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) Philadelphia Co, PA (421010024)115

Upwind State Downwind Nonattainment Receptors

IA Allegan Co, MI (260050003) KS Allegan Co, MI (260050003) Tarrant Co, TX (484390075) Tarrant Co, TX (484393011)

KY Baltimore Co, MD (240053001) Harford Co, MD (240251001) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Richmond Co, NY (360850067) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) Philadelphia Co, PA (421010024)

LA Collin Co, TX (480850005) Dallas Co, TX (481130069) Dallas Co, TX (481130075) Denton Co, TX (481211032) Harris Co, TX (482010024) Harris Co, TX (482010026) Harris Co, TX (482010055) Harris Co, TX (482011034) Harris Co, TX (482011039) Harris Co, TX (482011050) Tarrant Co, TX (484390075) Tarrant Co, TX (484393011)

MD Fairfield Co, CT (90010017) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Philadelphia Co, PA (421010024)

MI Fairfield Co, CT (90010017) Jefferson Co, KY (211110067) Oldham Co, KY (211850004) Harford Co, MD (240251001) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) MS Harris Co, TX (482010055) Harris Co, TX (482011039)

MO Oldham Co, KY (211850004) Allegan Co, MI (260050003) Camden Co, NJ (340071001) Hamilton Co, OH (390610006) Harris Co, TX (482010026) Harris Co, TX (482010055)116

Upwind State Downwind Nonattainment Receptors

Harris Co, TX (482011039) Harris Co, TX (482011050)

NJ Fairfield Co, CT (90010017) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Philadelphia Co, PA (421010024)

NY Fairfield Co, CT (90010017) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) NC Baltimore Co, MD (240053001)

OH Fairfield Co, CT (90010017) Jefferson Co, KY (211110067) Oldham Co, KY (211850004) Baltimore Co, MD (240053001) Harford Co, MD (240251001) Wayne Co, MI (261630019) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Allegheny Co, PA (420031005) Philadelphia Co, PA (421010024)

OK Allegan Co, MI (260050003) Hamilton Co, OH (390610006) Dallas Co, TX (481130069) Dallas Co, TX (481130075) Denton Co, TX (481211032) Harris Co, TX (482010026) Harris Co, TX (482011034) Harris Co, TX (482011039) Tarrant Co, TX (484390075) Tarrant Co, TX (484393011)

PA Fairfield Co, CT (90010017) Baltimore Co, MD (240053001) Harford Co, MD (240251001) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) TN Hamilton Co, OH (390610006) Philadelphia Co, PA (421010024)117

Upwind State Downwind Nonattainment Receptors

TX Baltimore Co, MD (240053001) Harford Co, MD (240251001) Allegan Co, MI (260050003) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) Philadelphia Co, PA (421010024)

VA Fairfield Co, CT (90010017) Baltimore Co, MD (240053001) Harford Co, MD (240251001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Philadelphia Co, PA (421010024)

WV Baltimore Co, MD (240053001) Harford Co, MD (240251001) Camden Co, NJ (340071001) Gloucester Co, NJ (340150002) Middlesex Co, NJ (340230011) Ocean Co, NJ (340290006) Queens Co, NY (360810124) Richmond Co, NY (360850067) Suffolk Co, NY (361030002) Hamilton Co, OH (390610006) Allegheny Co, PA (420031005) Philadelphia Co, PA (421010024) WI Allegan Co, MI (260050003) Wayne Co, MI (261630019)

As discussed previously, after the receptor and contribution analyses for this proposal were underway, the EPA released an updated IPM base case, version 5.15, and the final CPP. In order to reflect all on

- the

- books policies as well as the most current power sector modeling data, the EPA performed an assessment to reflect inclusion of IPM 5.15 with the CPP in

an ”adjusted” base case for this proposal. All references below118

to the “adjusted base case” refer to the 2017 air quality modeling base case which has been adjusted to account for the revised IPM 5.15 with CPP emissions. This assessment method relied on the EPA’s air quality modeling contribution data as well as projec ted ozone concentrations from an illustrative EGU
NO X mitigation scenario. For more information about these methods, refer to the Ozone Transport Policy Analysis Technical Support Document. This assessment shows that two receptors

-- Hamilton County Ohio ( 390610006) and Richmond County New York (360850067)

- – that were projected to hav e average design values exceeding the NAAQS in the modeled 2017 base line , are expected to have average design values below the NAAQS with the adjusted base case. However, t hes e receptors are still expected to have maximum design values exceeding the NAAQS with the adjusted base case. Because both of these receptors are also considered maintenance receptors for the purposes of this proposal, their status as identified air quality concerns and the status of states linked to these receptors is unchanged by the adjusted base case. This assessment also shows that four receptors

– Allegheny County Pennsylvania (420031005), Collin County Texas (480850005), Wayne County Michigan (261630019), and Middlesex County New Jersey (340230011)

- – that were projected to have maximum design values exceeding the NAAQS in the modeled base119

case, are expected to have maximum design values below the NAAQS with the adjusted base c ase. With the adjusted base case, t hese sites would not be considered nonattainment or maintenance receptors for the purposes of this proposal . However, because no
state is linked solely to any one of these sites, changing the
status of these receptors doe s not impact the scope of states linked to downwind nonattainment or maintenance receptors for this proposal. In addition to evaluating the status of downwind receptors identified for this proposal, t he EPA evaluated whether the adjusted base case would reduce ozone contributions from upwind states to the extent that a previously linked state would have a maximum contribution less than the 1% threshold. This assessment shows that in the adjusted base case, all states are expected to remain linked ( i.e., contribute greater than or equal to 1% of the NAAQS) to at least one downwind nonattainment or maintenance receptor. Therefore, using the adjusted base case for this proposal does not impact the scope of states linked to downwind nonattainment or mai ntenance receptors relative to the modeled base case. The EPA seeks comment on this analysis, but notes that for the final rule, the EPA intends to rely on full air quality modeling of the adjusted base case to identify nonattainment and120

maintenance recept ors and to inform the analysis of interstate ozone transport for the 2008 ozone NAAQS. The analyses that EPA uses in section VI to quantify EGU NO X

ozone - season emissions budgets for this proposal rely on the adjusted base case.

VI. Quantifying Upwind - State EGU NO X Reduction Potential to Reduce Interstate Ozone Transport for the 2008 NAAQS
A. Introduction This section describes the EPA’s proposed quantification of

near - term EGU NO X reductions that are necessary to fulfill (at least in part) the Clean Air Act requirement to address interstate ozone transport for the 2008 NAAQS. This section also describes the EPA’s proposal to translate these reductions into
EGU NO X ozone - season emissions budgets
. Section VII describes the EPA’s proposal to im plement these proposed emissions budgets via updates to the existing CSAPR NO X ozone - season trading program
. As described in section V, the EPA separately identified nonattainment receptors and maintenance receptors. The EPA proposes to apply a single approach for quantifying an upwind state’s ozone transport obligation to both nonattainment and maintenance receptors. It is reasonable to apply the same approach to quantify upwind

- state reduction requirements with respect to both nonattainment and mainte nance because the121

structur e of the problems is the same

— emissions from sources in upwind states contributing to downwind ozone concentrations that put the downwind receptor at risk of nonattainment with respect to the EPA’s clean air standards. Moreover, as all nonattainment receptors are also maintenance receptors because the maximum design value will always be equal to or exceed the average design value, it is reasonable to control all sites consistent with the level of control necessary to reduce maintenance concerns. As described in section III of this preamble, due to the impending July 2018 moderate area attainment date, the EPA is proposing , as a first step, to quantify near - term EGU NO X ozone season emission reductions to reduce interstate ozo ne transport for the 2008 ozone NAAQS. For this section, this means that the EPA is proposing to quantify ozone season EGU NO X reductions achievable for the 2017 ozone season (i.e., the last full ozone

season prior to the July 2018 attainment date)
. The EPA’s assessment of upwind state obligations in this proposal reflects application of a multi

- factor test that considers cost, available emission reductions, and air quality
. This is the same multi

- factor test used in the original CSAPR . This multi

- factor test considers increasing levels of uniform control stringency, where each level is represented by cost , to determine the appropriate magnitude of pollution reduction that122

would reduce the impacts of interstate transport on downwind
states and to apportion that reduction responsibility among collectively

- contributing upwind states. This approach to quantifying upwind state emission reduction obligations was reviewed by the Supreme Court in EPA v. EME Homer City Generation , which held that using such an approach to apportion reduction responsibilities among upwind states that are collectively responsible for downwind air quality impact s “is an efficient and equitable solution to the allocation problem the Good Neighbor Prov ision requires the Agency to address.” 134 S.Ct. at 1607. There are three steps in developing and applying the multi

factor test to quantify upwind state emission reductions as to the 2008 ozone NAAQS: (1) identify NO X mitigation strategies , focusing on those that can be in place for the 2017 ozone

season ; (2) develop uniform EGU NO X cost thresholds based on these NOx mitigation strategies ; (3) assess EGU NO X mitigation potential that is achievable for 2017 and assess corresponding air quality improvement s resulting from the application of each uniform cost threshold , including to check for over - control
. This multi

- factor evaluation informs the EPA’s determination of appropriate ozone season EGU NO X reductions necessary to reduce significant contribution to nonattainment and interference with maintenance of the 2008 ozone NAAQS for the proposed 2017123

compliance year. These steps are discussed in further detail in the following sections.
Th is proposal evaluates a range of uniform EGU NO X costs from $500 per ton to $10,000 per ton. This range, and the intermediate uniform NO X cost thresholds ev aluated within that
range , were selected based on the cost thresholds at which various EGU NO X control technologies are widely available, the

use of certain EGU NO X cost thresholds in previous rules to address ozone transport, and EGU NO X cost thresholds incorporated into state requirements to address ozone non attainment. The EPA evaluated the emission reduction potential in each upwind state at each uniform NO X cost threshold using IPM. In this case, t he EPA limited IPM’s evaluation of NO X mitigation strategies to those that can be implemented for the 2017 ozone

season , which is the proposed compliance timing for this rule ,

as described in section VI. B below.
B. NO X Mitigation Strategies The following sub

- sections describe the EPA’s assessment of EGU and non

- EGU point source NO X mitigation strategies. For more details on these assessments, refer to the EGU NO X Mitigation Strategies TSD and the Update to Non

- EGU Emission Reductions Cost and Potential for States with Potentially Significant Contributions under the 2008 Ozone Standa rd TSD in the docket for this proposed rule.124

1. EGU NO X Mitigation Strategies In developing this proposed rule, t he EPA considered all widely used EGU NO X control strategies: fully operating existing Selective Catalytic Reduction (SCR) and Selective Non

- Catalytic Reduction (SNCR)

– including optimizing NO X removal by existing , operational SCRs and SNCRs and turning on and optimizing existing idled SCRs and SNCRs; installation of (or upgrading to)
state

- of

- the

- art NO X combustion controls; shifting generation to units with lower NO X emission rates within the same state; and installing new SCRs and SNCRs. Although this proposal does not require or impose any specific technology standards to demonstrate com pliance, EPA determined that certain technologies would be available by the 2017 timeframe when assessing potential reductions in the region. For the reasons explained below, t he EPA determined that the power sector could implement all of the se NO X mitigation strategies, except installation of new SCRs or SNCRs , between finalization of this proposal in summer of 2016 and the 2017

ozone season . As to the installation of new SCRs or SNCRs, the amount of time from contract award through commissioning f or retrofit with new SCR or SNCR exceeds 18 and 12 months, respectively. For both technologies, conceptual design, permitting, financing, and bid review require additional time.
I t would therefore not be feasible to retrofit new SCR or SNCR125

to achieve EGU NO X reductions in the 2017 ozone season. See EGU
NO X Mitigation Strategies TSD for discussion of feasibility of
EGU NO X controls for the 2017 ozone season. The refore, the EPA analyze d the remaining strategie s for purposes of quantifying upwind state obliga tions in this rule. Exclusion of new SCR and SNCR installation from this analysis reflects a determination only that these strategies are infeasible by 2017, not a determination that they are infeasible or inappropriate for consideration of cost

- effective NO X reduction potential over a longer timeframe
. The EPA requests comment on what EGU NO X mitigation strategies are feasible for the 2017 ozone season .
a. Fully O perating E xisting SCR s and SNCR s Fully operating existing SCR and SNCRs can sign ificantly reduce EGU NO X emissions quickly , us ing investments that have already been made. SCRs can achieve up to 90 percent reduction in EGU NO X (with sufficient installed catalyst), while SNCRs can achieve 20

- 30 percent reduction in EGU NO X , beyond the reductions from combustion controls. These controls are in widespread use

across the U.S. power sector. In the east, approximately 64 percent of coal

- fired EGU capacity and 75 percent of n atural g as

c ombined c ycle ( NGCC ) EGU capacity is equipp ed with SCR or SNCR . Recent power sector data reveal that some SCR and SNCR controls126

are being under use d. 90 In some cases, controls are not fully operating (i.e. , the controls could be operated at a higher NO X removal rate) . In other cases, controls have been idled for
years. Fully operating existing SCR and SNCR would be a cost

effective and readily available approach for EGUs to reduce NO X emissions and the EPA evaluate d this NO X mitigation strategy in quantifying EGU NO X obligations for this proposal
. For existing SCRs and SNCRs that are operating to some
extent , but not at their full pollution control capabilit y, the EPA’s analysis determined that $500 per ton represents the costs reflective of fully operating these systems
. Because the SCR or SNCR is already installed and is at least to some extent operating, the EPA assumes that additional reagent (i.e., ammonia or urea) is the only significant cost required for full operation. We observe that urea can cost on the order of $300
per metric ton. The cos t for anhydrous ammonia is around $750
per ton . 91 In our assessment , we assume that a 50 percent

90 This assessment is available in the EGU NO X Mitigation Strategies TSD.

91 Schnitkey, G. " Nitrogen Fertilizer Prices and 2015 Planting Decisions ." farmdoc daily (4):195, Department of Agricultural and Consumer Economics, University of Illinois at Urbana

- Champaign, October 9, 2 014.
Permalink URL http://farmdocdaily.illinois.edu/2014/10/nitrogen

fertilizer

- prices

- and

- 2015

- planting

- decisions.html127

solution is use d in removing an equivalent amount of NO X . Thus, we estimate that sufficient reagent could be purchased at a cost of $500 per ton of NO X removed to achieve full operation for most
SCRs and SNCRs
. For more details on this assessment, refer to the EGU NO X Mitigation Strategies TSD in the docket for this proposed rule. The proposal seeks comment on this assessment
. The operational difference between not fully operating and fully operating existing SCRs and SNCRs is increasing reagent (i.e., ammonia or urea) flow rate and ensuring sufficient reagent exists to sustain higher flow operations. Therefore, increasing NO X removal from these controls can be i mplemented by procuring more reagent. Stocking

- up additional reagent for sustaining increased NOX removal could be done in a one or two weeks. 92 For existing SCRs and SNCRs that have been idled for years, unit operators may need to restart payment of some f ixed and variable costs associated with that control. Fixed and variable costs include labor, maintenance and repair, reagent, parasitic load , and ammonia or urea. As further detailed in the EGU NO X Mitigation Strategies TSD , which is found in the docket f or this proposed rule, the EPA performed an in

- depth cost assessment for all coal

- fired units with SCRs , finding that 90 percent of the

92 This assessment is available in the EGU NO X Mitigation Strategies TSD.128

units had total SCR operation costs of $1,300 per ton of NO X removed, or less. Based on this assessment, t he EPA proposes that turning on and fully operating idled SCRs is widely available at a uniform cost of $1,300 per ton of NO X removed
. For more details on this assessment, refer to the EGU NO X Mitigation Strategies TSD in the docket for this proposed rule. The proposal seeks comment on this assessment. The EPA performed a similar assessment for fully operating existing idled SNCR systems , finding that the majority of the total fixed and variable operating cost for SNCR is related to the cost of the reagent u sed (e.g., ammonia or urea) and that the resulting cost per ton of NO X reduction is sensitive to the
NO X rate of the unit prior to SNCR operation
. Based on the results of this analysis, and in order to represent a broad range of unit

- level NO X rates before SNCR operation, the EPA proposes that turning on and full y operating idled SNCRs is widely available at a uniform cost of $3,400 per ton of NO X removed. For more details on this assessment, refer to the EGU
NO X Mitigation Strategies TSD in the docket for this proposed rule. The proposal seeks comment on this assessment and on higher cost thresholds that would require some installation of new SCRs/SNCRs and the appropriate timetable or phase

- in needed to accommodate those technologies.129

The EPA also evaluat ed the feasibility of turning on idled SCR and SNCR for the 2017 ozone season. Based on past practice and the possible effort to restart the controls (e.g., stockpiling reagent, bringing the system out of protective lay

up, performing inspections, etc.), returning these idled controls to operation should be available in equal to or less than 3 months. 93 The proposal seeks comment on this assessment. b. S tate

- of

- the

- art NO X C ombustion C ontrols
State

- of

- the

- art combustion controls such as low

- NO X burners (LNB) a nd/or over

- fire air (OFA) are cost

- effective, can be installed quickly, and can significantly reduce EGU NO X emissions. Ninety

- nine percent of coal

- fired EGU capacity in the East is equipped with some form of combustion control. Combustion controls alone c an achieve NO X em ission rates of 0.15 to 0.50 lb/mmBtu. Once installed, combustion controls reduce NO X emissions at all times of EGU operation. State

- of

- the

- art combustion controls would be a cost

- effective, timely, and readily available approach for EGUs to reduce NO X emissions and the EPA include d this NO X mitigation strategy in quantifying EGU
NO X reductions for this proposal
. The cost of sta te

- of

- the

- art combustion controls per ton of
NO X reduced is dependent on the combustion control type and unit

93 This assessment is available in the EGU NO X Mitigation Strategies TSD.130

type. We estimate the cost per ton of state

- of

- the

- art combustion controls to be $500 per ton to $1,200 per ton of NO X removed. To be conservative , t he EPA proposes that installation of (or upgrading to) state

- of

- the

- art NO X combustion controls is widely available at $1,300 per ton of NO X removed. As described in CSAPR the EPA has observed that upgrade, replacement, or installation of combustion co ntrols has been demonstrated to be achievable within the timeframe provided for by this rulemaking and its compliance dates
. 94 The EPA revisited this analysis with data specific to this proposal and proposes that a 2017 compliance timeframe is feasible for this EGU NO X mitigation strategy. These controls are fully proven, widely used, and with a reasonable effort can be procured, designed, installed, tested and be in op eration on any coal

- steam EGU consistent with the compliance timeframe provided for this

r ulemaking
. The EPA proposes that this will be feasible for the 2017 ozone season. The proposal seeks comment on additional EGU NOx mitigation strategies that may be feasible for the 2017

ozone season. For more details on this assessment, refer to the EGU NO X Mitigation Strategies TSD in the docket for this proposed rule. The proposal seeks comment on this assessment.

94 “Installation Timing for Low NOx Burners (LNB)”, Docket ID No. EPA

- HQ

- OAR

- 2009

- 0491

- 0051131

c. Shifting G eneration to L ower NO X - emitting EGUs Shifting generation to lower NO X - emitting EGUs, similar to operating existing post

- combustion controls, use s investments that have already been made, can be done quickly, and can significantly reduce EGU NO X emissions. Since CSAPR was promulgated, electricity generation has trended tow ard lower NO X - emitting generation due to market conditions (e.g., low natural gas prices) and state and federal environmental policies. For example, new NGCC facilities, which represented 45% of new 2014 capacity, can achieve NO X emission rates of 0.0095 lb/mmBtu, compared to existing coal steam facilities , which emitted at an average rate across the 23 states included in this proposal of 0.18 lbs/ mmBtu of NO X in 2014. This substantial difference in NO X emission performance between existing coal steam and new NGCC generation is due both to higher nitrogen content in coal compared to natural gas, as well as to the substantially lower generating efficiency of steam combustion technology compared to combined cycle combustion technology. Shifting generation to lower NO X - emitting EGUs would be a cost

- effective, timely, and readily available approach for EGUs to reduce NO X emissions and the EPA included this NO X mitigation strategy in quantifying EGU NO X obligations for this proposal
.132

Shifting generation to lower NO X - emitting EGUs occurs on a continuum in response to economic factors such as fuel costs and uniform NO X cost thresholds, including those evaluated for this proposal (i.e. , relatively lower uniform NO X cost thresholds incent ivize relatively fewer EGU NO X reductions resulting from shifting generation , while relatively higher uniform NO X cost thresholds encourage more EGU NO X reductions driven by shifting generation ). As a result, t he EPA quantif i ed reduction potential from this EGU NO X mitigation strategy at each cost level identified that represents the availability of other pollution control measures evaluated in our assessment of uniform NO X cost thresh olds described in section VI.C. In this analysis, t he EPA assumed shifting genera tion to units with lower NO X emission rates could occur within the same
state by the near

- term 2017 implementation timing for this proposed rule when assessing state emission reduction potential for emission s budget purposes
. This conservative approach do es not capture emission reductions that would occur if generation was shifted more broadly among units in different states, which the EPA believes is feasible over time but which may be subject
to out

- of

- merit order dispatch constraints in the near term. Limiting such generation shifting potential to units within each state is not a reflection of how generation shifting works in practice (given that the grid crosses state boundaries);133

instead, it is an analytic proxy designed to respect the feasibility of near - term generation shifting in light of these potential near

- term out

- of

- merit order dispatch constraints. The EPA seeks comment on this assessment and on this limitation in quantifying EGU NO X reduction potential for the 2017 ozone

season. 2. Non

- EGU NO X Mitigation Strategies The EPA is not proposing to address non - EGU emission reductions in its efforts to reduce interstate ozone transport for the 2008 ozone NAAQS at this time
. Compared to EGUs, there are relatively more non

- EGU point sources and these s ources on average are smaller than EGUs
. The implication of these fleet characteristics is that there are more individual sources to control and there are relatively fewer emission reductions available from each source. Given the proposed 2017 implementation timing for this rule , we are uncertain that significant aggregate NO X mitigation is achievable from non - EGU point sources for 2017
. Moreover, there is greater uncertainty in the EPA’s assessment of non

- EGU point

- source NO X mitigation potenti al (see below). The EPA requests comment on these issues, including how non

- EGU reductions should be addressed and considered in fulfilling upwind states’ good neighbor obligations under the 2008 ozone standard in the future, as the control of non - EGUs may be a necessary part of address ing134

states’ full transport obligation. States can always choose to reduce non

- EGU emissions via good neighbor SIPs. The EPA has evaluated the potential for ozone season NO X reductions from non

- EGU sources. A detailed discussion of this assessment is provided in the Non

- EGU NO X Mitigation Potential
TSD , located in the docket for this proposed rule. This TSD discusses non

- EGU source category emissions, EPA tools for estimating emission reductions from non

- EGU categories, and efforts, to date, to review and refine our estimates for certain states. In addition, the TSD contains brief discussions of available controls, costs, and potential emission reductions for a few specific so urce categories. The EPA views this non

- EGU assessment as an initial step in future efforts to evaluate non

EGU categories that may be necessary to fully quantify upwind states’ significant contribution to nonattainment and interference with maintenance. T he EPA seeks comment on its assessment that non

- EGU controls are not feasible by the 2017

ozone - season. It also seeks comment on its broader non - EGU NO X mitigation assessment and the availability of non

- EGU NO X emission reductions to mitigate interstate ozone transport in years following 2017
. Although EPA did not find non

- EGU reductions feasible by 2017 in this proposal, it is taking comment on that asses sment. Future EPA rulemakings or guidance c ould revisit the potential135

for reductions from non

- EGU sources. Under such a scenario, EPA could use a similar approach of identifying appropriate cost thresholds for non

- EGUs and EGUs alike, and then identify potential emission reductions and corresponding emission budgets. Under this scenario, an emission budget could be established for all covered sources (e.g., EGUs and non

- EGUs alike) with fungible allowances. EPA is taking comment on the potential to combine EGUs and non

- EGUs into a single trading program to r esolve the remaining non

- attainment and maintenance issues at a later date.
C. Uniform EGU Cost Thresholds for Assessment As discussed above, the multi

- factor test used here considers increasing levels of uniform control stringency, where each level is repres ented by cost , in combination with consideration of NO X reduction potential and corresponding air quality improvements
. To determine which cost thresholds to use to assess upwind state NO X mitigation potential, the EPA evaluated EGU NO X control costs that represent the thresholds at which various control technologies are widely available ( described previously in section VI.B ), the use of certain cost thresholds in previous rules to address ozone transport , and cost thresholds incorporated into state requirements to address

ozone nonattainment.136

The EPA began by determining the appropriate range of costs to evaluate. The lower end of the range is informed by a confluence of considerations. In CSAPR, $500 per ton was the EGU
NO X cost threshold relied upon to partially address ozone transport for the less stringent 1997 standard. It is also the lowest marginal cost where EPA expects NO X reduction to be cost effective, based on our assessment of EGU NO X mitigation strategies (see s ection B). Specifically, the cost of this approach to NO X reduction is the marginal cost of running currently operating SCR and SNCR systems at higher levels of NO X removal than they are currently achieving. The EPA has not identified a discrete NO X pollut ion control measure that would achieve sufficient emission reductions to address relevant air quality impact s at an estimated cost of less than $500 per ton; as a result, the EPA has not included a representation of such a cost level in this proposal’s ana lyses. 95
The EPA then evaluated EGU NO X cost thresholds to determine an appropriate upper bound for our assessment. T he EPA identified $10,000 per ton as an upper bound, exceeding the costs of operating existing or installing new EGU NO X controls.

95 Additionally, the EPA notes that, as discussed in more detail below, no identified air quality problems were resolved at the $500 per ton cost threshold. Accordingly, it would not be practical for the EPA to evaluate emission reductions achieved at cost thresholds below $500 per ton.137

The EPA seeks comment on whether $500 per ton is an appropriate minimum and $10,000 per ton is an appropriate maximum uniform cost threshold to evaluate for the purpose of quantifying EGU NO X reductions to reduce interstate ozone transport for the 2008 ozone NAAQS
. The EPA then determined appropriate EGU NO X cost thresholds to evaluate within the range of $500 per ton to $10,000 per ton. As described above, these cost thresholds are informed by our assessment of the costs at which EGU NO X control strategies are wid ely available. While the EPA could evaluate additional cost thresholds in between those selected, this would not yield meaningful insights as to NO X reduction potential. T he EPA has identified cost thresholds where control technologies are widely available and thereby where the most significant incremental emission reduction potential is expected. Analyzing costs between these cost thresholds is not expected to reveal significant incremental emission reduction potential that isn’t already anticipated at the analyzed cost thresholds. Table VI. C

1 lists the EGU NO X cost thresholds evaluated and the NO X reduction strategy or policy used to identify each cost threshold. Table VI. C

- 1
EGU NO X Cost Threshold $500/ton CSAPR ozone season NO X cost threshold; fully operating138 post

- combustion controls that are already running. $1,300/ton Widespread availability of restarting idled SCRs and state of the art combustion controls $3,400/ton NO X SIP Call ozone season NO X cost threshold, adjusted to 2014$; Widespread availability of restarting idled SNCRs $5,000/ton Widespread availability of new SCRs 96 $6,400/ton Widespread availability of new SNCRs 97 $10,000/ton Upper bound
The EPA proposes that this range and selection of interim uniform cost thresholds are appropriate to evaluate potential
EGU NO X reduction obligations to address interstate ozone transport for the 2008 ozone NAAQS. Because these cost thresholds are linked to costs at which EGU NO X mitigation strategies be come widely available in each state , the cost thresholds represent the break points at which the most significant step

- changes in EGU NO X mitigation are expected. The EPA seeks comment on the appropriateness of evaluating these uniform cost thresholds for the purpose of quantifying EGU NO X

96 Th e cost assessment for new SCR is available in the EGU NO X Mitigation Strategies TSD. W hile chosen to define a cost

- threshold, new SCRs were not considered a feasible control on the compliance timeframe being proposed for this rule. 97 Th e cost assessment for new SNCR is available in the EGU NO X Mitigation Strategies TSD. W hile chosen to define a cost

- threshold, new SNCRs were not considered a feasible control on the compliance timeframe being proposed for this rule.139

reductions to reduce interstate ozone transport for the 2008 ozone NAAQS.
D. Assessing Cost, EGU NO X Reductions, and Air Quality The EPA analyzed ozone season NO X emission reductions available from the power sector in each state using IPM. 98 The agency analyzed levels of uniform control stringency, where each level is represented by uniform EGU NO X cost threshold s listed in Table VI. C

- 1 above and repeated here: $500 per ton ; $1,300 per ton; $3,400 per ton; $5,000 per ton; $6,400 per ton; and $10,000 per ton . The EPA limited IPM’s NO X mitigation strategies to those that could be implemented for 2017, as described in section
VI.B. The analysis applied the se uniform EGU NO X co st thresholds
to EGUs in the 48 contiguous United States and the District of Columbia , starting in 2017. The analysis covered EGUs with a capacity (electrical output) greater than 25 MW to make the analysis similar to previous analyses done for interstate transport purposes . The EGU Emission Reduction Cost Analysis
TSD , which is in the docket for this proposed rule, provides further details of EPA’s analysis of ozone season NO X emission

98 IPM v ersion 5.14 is discussed in preamble section IV.B. IPM documentation is in the docket and available at www.epa.gov/powersectormodeling.140

reductions occurring at the representative EGU NOx cost thresholds analyzed for the 2017 ozone season . Table V I . D

- 1 shows the 2017 base line EGU emissions and

ozone season NO X reduction potential in each state corresponding to the uniform cost levels. Table V I . D - 1 . EGU Ozone Season NO X Emission Reductions (Tons)

State 2017

Emissions (short tons) Reduction Potential (short

tons) at Various Representative Marginal Costs per Ton (in 2011$) Base Case $500/ton $1,300/ton $3,400/ton Alabama 13,289 1,729 3,582 3,670 Arkansas 6,224 13 104 859 Illinois 10,021 395 472 546 Indiana 41,748 6,611 12,173 12,989 Iowa 7,911 186 423 717 Kansas 11,332 428 438 465 Kentucky 27,141 3,608 11,896 12,382 Louisiana 10,897 64 117 400 Maryland 6,470 1,028 1,026 1,164 Michigan 20,049 403 3,033 3,528 Mississippi 7,871 82 297 893 Missouri 17,050 934 996 1,152 New Jersey 3,302 370 372 378 New York 4,948 115 284 359 North Carolina 14,435 1,922 1,922 3,526 Ohio 27,795 5,746 9,646 9,666 Oklahoma 19,593 703 2,170 3,169 Pennsylvania 41,533 2,210 26,759 26,791 Tennessee 5,554 74 113 146 Texas 58,199 685 3,610 5,810 Virginia 7,196 423 539 1,587 West Virginia 25,384 592 10,908 12,014 Wisconsin 5,257 5 36 107 Total 393,198 28,325 90,916 102,318 Table VI. D - 1 (continued). EGU Ozone Season NO X Emission Reductions (Tons)141

State Reduction Potential (short tons)

at Various Representative Marginal Costs per Ton (in 2011$) $5,000/ton $6,400/ton $10,000/ton Alabama 4,780 5,418 5,840 Arkansas 1,147 1,242 1,935 Illinois 622 640 761 Indiana 13,770 13,437 17,109 Iowa 717 717 1,317 Kansas 677 838 1,150 Kentucky 12,473 13,456 14,503 Louisiana 461 467 706 Maryland 1,176 1,369 1,369 Michigan 3,756 3,889 4,411 Mississippi 1,165 1,479 2,208 Missouri 1,298 1,930 2,775 New Jersey 381 384 465 New York 370 661 906 North Carolina 3,626 4,415 4,643 Ohio 9,773 10,078 10,231 Oklahoma 3,821 5,702 6,609 Pennsylvania 26,913 26,932 27,091 Tennessee 224 241 285 Texas 6,940 7,772 8,380 Virginia 3,104 3,560 3,610 West Virginia 12,211 12,243 12,243 Wisconsin 131 276 618 Total 109,535 117,145 129,166

Next, the EPA performed a combined multi

- factor assessment of costs (i.e., the uniform cost thresholds evaluated), EGU NO X reductions (i.e., the reductions in Table VI.D

- 1 ), and corresponding improvements in downwind ozone concentrations . For this assessment, the EPA used simplifying assumptions regarding the relationship between EGU NO X emissions and corresponding ozone concentrations at nonattainment and maintenance receptors of concern. For more information about how this assessment was142

performed, refer to the Ozone Transport Policy Analysis Technical Support Document. For each nonatt ainment or maintenance receptor identified for this proposal, the EPA evaluated the air quality improvement at that receptor that is expected from progressively more stringent upwind EGU NO X reductions in states that are linked to that receptor. For exampl e, the EPA evaluated the Harford County Maryland receptor with all linked states controlling their emissions at $500 per ton. This assessment showed a 0.35 ppb reduction in expected ozone design value s at $500 per ton. The residual design values at this site are still expected to exceed the 2008 ozone NAAQS with an average design value of 81.2 ppb and a maximum design value of 83.9 ppb. Next, t he EPA evaluated this receptor with all linked states controlling their emissions at $1,300 per ton. This assessment showed a 0.94 ppb reduction in expected ozone design values. At a cost threshold of $1,300 per ton, t he residual design values at this site are expected to continue to exceed the 2008 ozone NAAQS with an average design value of 80.6 ppb and a m aximum design value of 83.3 ppb. With respect to this receptor, t he EPA then evaluated each progressively more stringent uniform control stringency (i.e. $3,400 per ton; $5,000 per ton; $6,400 per ton; and $10,000 per ton). Generally , t he EPA evaluated the air quality improvements
at each monitoring site for each progressively more stringent143

uniform EGU NO X control level. This information is available in the Ozone Transport Policy Analysis TSD. This approach evaluates interstate ozone transport for each receptor independently
. Also, by evaluating the downwind ozone impact of upwind reductions that are made in all linked states
at the same uniform control stringency, this approach provides equitable treatment of all upwind states as to their contribution t o each downwind receptor to which they are linked
. The EPA aggregates the relevant data (i.e., cost of control, EGU NO X reduction potential, and downwind ozone reduction metrics) in a multi

- factor test that allows the EPA to evaluate the cost

- effectiveness of various levels of emission reductions and the resulting improvements in downwind ozone concentrations. This evaluation shows that meaningful EGU NO X reductions are available at reasonable cost and that these reductions can provide meaningful improveme nts in downwind ozone concentrations at the identified nonattainment and maintenance receptors for this proposal. For example, the combined downwind ozone improvement across nonattainment and maintenance receptors is approximately 19 ppb at the $1,300 per ton level. See Figure
VI. 1
.144

Figure VI. 1 . EGU Ozone season NO X Reduction Potential in 24 linked states and Corresponding Total Reduction in Downwind Ozone Concentrations at Nonattainment and Maintenance Receptors for each Uniform NO X Cost Evaluated

Combining costs, EGU NO X reductions, and corresponding improvements in downwind ozone concentrations results in a “knee in the curve” at $1,300 per ton. This uniform cost of reduction represents the threshold at which EGU NO X reduction potential and

corres ponding downwind ozone air quality improvements are maximized with respect to marginal cost. That is, the ratio of emission reductions to marginal cost and the ratio of ozone improvements to marginal cost are maximized relative to the other uniform cost th resholds evaluated. Further, at higher cost 0 6 12 18 24 30

- 30,000 60,000 90,000 120,000 150,000

$0 $2,000 $4,000 $6,000 $8,000 $10,000 Total Ozone Improvement at Nonattainment and Maintenance Receptors (ppb) EGU Ozone - season NO X Reduction Potential (tons)

Uniform NOx Cost Thresholds

NOX Reduction Potential Ozone Improvement145

thresholds, as a result of this analysis we do not anticipate significant additional reductions that would justify these higher costs. As part of this analysis, the EPA evaluate s potential over

control with respe ct to whether (1) the expected ozone improvements would be sufficient or greater than necessary to resolv e the downwind ozone pollution problem (i.e., resolving nonattainment or maintenance problems) or (2) the expected ozone improvements would reduc e upwind state ozone contributions to below the screening threshold (i.e., 1% of the NAAQS).
In EME Homer City , the Supreme Court held that EPA cannot “require [] an upwind State to reduce emissions by more than the amount necessary to achieve attainment in every downwind State to which it is linked.” 134 S.Ct. at 1608. On remand from the Supreme Court, the D.C. Circuit held that this means that EPA might overstep its authority “when those downwind locations would achieve attainment even if less stringent emi ssions limits were imposed on the upwind States linked to those locations.” EME Homer City II , 795 F.3d at 127
. The D.C. Circuit qualified this statement by noting that this “does not mean that every such upwind State would then be entitled to less stringe nt emission limits. Some of those upwind States may still be subject to the more stringent emissions limits so as not to146

cause other downwind locations to which those States are linked to fall into nonattainment.” Id. at 14

- 15. Consistent with these instruction s from the Supreme Court and the D.C. Circuit, the EPA evaluated whether reductions quantified under the evaluated cost thresholds can be anticipated to resolve any downwind nonattainment or maintenance problems (as defined in section V) and by how much
. The EPA’s assessment shows that the uniform control stringency represented by $500 per ton would resolve the maintenance problem at two downwind maintenance receptors

-- Ocean County New Jersey (maximum design value of 75.9 ppb) and Oldham Count y Kentucky (maximum design value of 75.8 ppb)
. B ecause no state is linked solely to one of these maintenance receptors , resolving the se downwind air quality impact does not fully address any individual upwind state’s good neighbor obligation. This assessme nt shows that the uniform control stringency represented by $1,300 per ton would resolve maintenance problems at three additional downwind maintenance receptors

– - Baltimore County Maryland (maximum design value of 75.6 ppb) , Hamilton County Ohio (maximum design value of 75.1 ppb) , and Gloucester County New Jersey (maximum design value of 75.8 ppb) . The EPA’s assessment shows that this control level does resolve the only identified nonattainment or maintenance problem to which North147

Carolina is linked for this proposal

– the Baltimore County Maryland maintenance receptor
. T he EPA therefore proposes that this EGU control level would fully address North Carolina ’s good neighbor obligation with respect to the 2008 ozone NAAQS. The EPA seeks comment on this det ermination. The EPA also proposes that, based on the information supporting this proposal, this level of EGU NO X control for North Carolina would not constitute over

- control as to the Baltimore County receptor . The level of the 2008 ozone standard NAAQS is 75 ppb. At the uniform $1,300 per ton cost threshold, EPA’s assessment demonstrates that the receptor would just be maintaining the standard, with a maximum design value of 75.6 ppb. Therefore, the emissions reductions that would be achieved at the $1 ,300 per ton cost threshold would not result in air quality improvements at the Baltimore County receptor significantly better than the standard such the emission reductions might constitute over

- control as to that receptor. On the contrary , the emission reductions achieved in upwind states at the $1,300 per ton cost threshold are necessary to bring the maximum design value at the Baltimore County receptor into alignment with the standard. The EPA also seeks comment on this determination. For the remainder of the states for which the EPA is proposing FIPs in this action, none of these states are linked148

solely to one of these maintenance receptors with air quality resolved at the $1,300 per ton cost threshold . Therefore, resolving these down wind air quality impact s does not fully address any other individual upwind state’s good neighbor obligation. As noted above the EPA is proposing that the $1,300 per ton EGU control level would fully address North Carolina’s good neighbor obligation with r espect to the 2008 ozone NAAQS. As such, based on the data supporting this proposal, North Carolina was excluded from assessment of air quality improvements at more stringent uniform EGU NO X control levels. The EPA’s assessment shows that the uniform cont rol stringency represented by $3,400 per ton would resolve the maintenance problem at two additional downwind maintenance receptors

-- Denton County Texas ( 481211032) (maximum design value of 7 5
. 9 ppb) and Harris County Texas (482011050) (maximum design value of 7 5
. 9 ppb). B ecause no state is linked solely to one of these maintenance receptors, resolving these downwind air quality impact s does not fully address any individual upwind state’s good neighbor obligation. The EPA provides this summary of the e valuation for the $500 per ton; $1,300 per ton; and $3,400 per ton uniform cost thresholds because, as described below, the EPA is proposing to use the $1,300 per ton level and is taking comment on using the149

$500 per ton level or $3,400 per ton level to qu antify ozone
season EGU NO X requirements to reduce interstate ozone transport for the 2008 ozone NAAQS. Further information on the EPA’s evaluation of these cost thresholds as well as additional cost thresholds ($5,000 per ton; $6,400 per ton; and $10,000 per ton) are provided in the Ozone Transport Policy Analysis Technical Support Document. Additionally, Table VI. D

- 2 provides a summary of the expected number of nonattainment and maintenance

- only receptors at the adjusted base case and cost thresholds. Table VI. D - 2 Number of Nonattainment or Maintenance Receptors after EGU NO X Mitigation
Cost Threshold Nonattainment Receptors Maintenance

- Only

Receptors Base Case (IPM 5.15 w/CPP) 12 21 $500 per ton 12 19 $1,300 per ton 12 14 $3,400 per ton 12 13 $5,000 per ton 12 13 $6,400 per ton 12 13 $10,000 per ton 12 12

In EME Homer City , the Supreme Court also held that “EPA cannot require a State to reduce its output of pollution . . . at odds with the one

- percent threshold the Agency has set.” 134 S.Ct. at 1608. The Court explained that “EPA cannot demand reductions that would drive an upwind State’s contribution to every downwind State to which it is linked below one percent of the relevant NAAQS.” Id. Accordingly, the EPA also evaluated the potent ial for over

- control with respect to the 1% threshold150

proposed to be applied in this rule at each relevant cost threshold. Specifically, t he EPA evaluated whether the uniform cost thresholds would reduce upwind EGU emissions to a level where the contributi on from each upwind state would be below the 1% threshold that linked the upwind state to the downwind receptors. If the EPA found that any state’s reduction obligation at the applied cost threshold decreased its contribution to every downwind receptor to which it is linked below the 1% threshold, we would need to adjust the state’s reduction obligation accordingly. The EPA’s assessment reveals that there is not over

- control with respect to the 1% threshold
at any of the evaluated uniform cost s in any upwind state ; in fact, even at the highest uniform cost threshold evaluated (e.g., $10,000 per ton), all upwind states that contributed greater than or equal to the 1% threshold in the base case continued to contribute greater than or equal to 1% of the NA AQS to at least one downwind nonattainment or maintenance receptor. 99 Therefore, the EPA does not expect any of the uniform cost thresholds evaluated to result in over

- control relative to the 1% threshold. For more information about this assessment, refer

99 As discussed above, North Carolina would not be regulated at any level higher than $1300/ton and at that level, there’ s no over - control as to the 1% threshold. In fact, while the receptor to which North Carolina is linked resolves its maintenance problem at the $1,300/ton level, North Carolina would continue to contribute equal to or greater than 1% to that air quality mo nitor.151

t o the Ozone Transport Policy Analysis Technical Support
Document. The EPA proposes to determine ozone season EGU NO X control requirements for upwind states to reduce interstate ozone transport for the 2008 ozone NAAQS based on the reduction potential quantified from pollution control measures that are
cost

- effective at the $1,300 per ton level
. The EPA seeks
comment on potentially basing these ozone season NO X control requirements on uniform cost levels that are less s tringent ($500 per ton) or more stringent ($3,400 per ton) , including comments on the proposed approach to addressing a state like North Carolina in such a situation, which is explained below.
. The EPA notes that the evaluation of cost, NO X reductions, and ozone improvements for the final rule could show different results for different states . For example, one or more states could fully address their good neighbor obligation based on

ozone season NO X control requirements represented by one cost level while one or more other states would not fully address their good neighbor obligation at that level and would have

ozone season NO X control requirements based on a more stringent cost level in order to fu lly address or make further progress toward partially addressing their good neighbor obligation . In this situation , the EPA proposes that it would quantify requirements for these different groups of states based on152

different uniform control stringencies. T his could be similar to EPA’s establishing two different SO2 groups under the original CSAPR as to addressing PM 2.5 transport. The EPA seeks comment on this proposed approach for quantifying requirements. The EPA also seeks comment on implementation of th e resulting emissions budgets
. The EPA proposes that if there are groups of states with ozone season NO X control requirements based on different cost levels, we would nevertheless finalize FIPs for the states in these groups of states that incorporate participation in a trading program that allows them to trade allowances with each other subject to limitations describ ed in section VII of this proposal. By way of example and a s noted above, the EPA is also seeking comment on potentially basing ozone season NO X control requirements on the $3,400 per ton uniform cost levels
. I f the
EPA were to finalize ozone season NO X control requirements based

on this level, given the specific data informing this proposal, then the EPA would set North Carolina’s requirements based on the less stringent $1,300 per ton level because, a s discussed above, the sole receptor to which North Carolina is linked for this proposal is resolved at the $1,300 per ton level with a maximum design value of 75.6 ppb. The refore, because the $1,300 per ton level fully addresses North Carolina’s good neighbor obligation , if EPA were to determine ozone season NO X control153

requirements base d on the $3,400 per ton level for the remainder of states, the EPA would finalize good ne ighbor requirements for these two groups of states using different uniform control stringencies. The EPA proposes that it would finalize FIPs for the states that incorporate participation in a trading program that allows them to trade allowances with each other subject to limitations described in section VII of this proposal. The EPA’s selection of reductions for this rule is specific
to , and appropriate for , defining near - term achievable upwind obligations with respect to the 2008 ozone NAAQS in states where a FIP is necessary
. We do not intend

– nor do we believe we would be justified in doing so in any event

– that the cost

level

- based determinations in t his proposed rule impose a constraint for selection of cost levels in addressing transpo rted pollution with respect to future NAAQS and/or any revisions to these FIPs for any other future transport rules that the EPA may develop to address any potential remaining obligation as to the current NAAQS, for which different cost levels may be appro priate. As described above, the EPA is proposing that the NO X emission reductions associated with uniform control stringency represented by $1,300 per ton would not result in over

- control at any of the identified non

- attainment or maintenance receptors154

an d it is reasonable to require such reductions from upwind
states. The EPA requests comment on its proposal to quantify ozone

season EGU NO X reductions to reduce interstate transport with respect to the 2008 ozone NAAQS using the $1,300 per ton uniform
cost threshold
. Note that our assessment of EGU NO X reduction potential shows zero reductions available in Delaware in 2017 at any evaluated cost threshold. A t this time, because the assessment shows no EGU NO X reduction potential within Delaware up to $10,000 per ton and because Delaware does not currently participate in the original CSAPR NO X ozone - season allowance trading program , the EPA is not proposing to promulgate a FIP for Delaware to be included in this rule. However, as this assessment has only considered reductions available at EGUs by 2017, the EPA cannot at this time conclude that Delaware does not have reductions available on a longer timeframe or from other emission sectors. Accordingly, the EPA cannot c onclude at this time that Delaware does not significantly contribute to nonattainment or interfere with maintenance at downwind receptors to which it is linked. The EPA will evaluate additional reduction potential from Delaware in a future rulemaking to ad dress the 2008 ozone standard. The EPA seeks comment on not including Delaware in the proposed FIPs.155

The EPA’s EGU NO X reduction assessment also shows nearly zero reductions available in Wisconsin in 2017 at the proposed $1,300 per ton cost threshold. Howe ver, Wisconsin currently participates in the original CSAPR NO X ozone - season emissions trading program and Wisconsin’s original CSAPR NO X ozone emissions budget is greater than its projected base case emissions. The EPA proposes to update Wisconsin’s emissions budgets because not doing so would mean that Wisconsin, which is found to contribute above 1% to downwind ozone problems, could increase emissions above its base case level. The EPA proposes to determine ozo ne season NO X control requirements for Wisconsin to reduce interstate ozone transport for the 2008 ozone NAAQS based on the reduction potential quantified from pollution control measures that are cost

- effective at the $1,300 per ton level. For Wisconsin, b ased on modeling for this proposal, this level is similar to its projected base

- case level. The EPA seeks comment on the proposed FIP for Wisconsin
. The EPA also requests comment as to whether the EPA should treat Delaware and Wisconsin in the same manner with respect to their inclusion or exclusion from the ozone

- season trading program with respect to the 2008 ozone NAAQS. For example, the EPA requests comment as to whether both Delaware and Wisconsin should be included in the ozone

- season trading program with budgets on the reduction potential quantified from pollution156

control measures that are cost

- effective at $1,300 per ton,. EPA also requests comment as to whether both states should instead be excluded from the ozone

- season trading program.
E. Quantifyi ng State Emission s Budgets The proposed emission s budgets reflect remaining EGU emissions after upwind states achieve the emission reduction obligations defined in section VI of this proposal. In the original CSAPR proposal, the EPA set proposed emission s budgets by using an approach that considered monitored
state

- level heat input and modeled state

- level emissions rates. However, for the CSAPR final rule, the EPA set budgets using only the modeling results from CSAPR’s uniform cost assessment. For this ru le, the EPA proposes to set emission s budgets by considering monitored heat input and modeled emissions rates, similar to the original CSAPR proposal. The EPA seeks comment on all aspects of quantifying state emission s budgets reflecting upwind obligations , including alternative metrics to heat input , such as generation The EPA proposes to quantify state emission s budgets using the minimum of calculated EGU emissions budgets using the state

level EGU NO X emission rates that correspond to the upwind state

re ductions identified above using a uniform cost threshold of $1,300 per ton or 2014 monitored historic emissions
.157

T he proposed approach for translating this EGU NO X reduction potential into emissions budgets is a four step process. First , the EPA would use the resulting 2018 state

- level modeled EGU NO X emissions rate (lbs/mmBtu) from the IPM $1,300 per ton uniform
cost assessment. The state

- level rate is calculated as the total emissions from affected sources within the state, divided by the total heat input from these sources. Second, t he EPA proposes to multiply this modeled state

- level emissions rate by 2014 monitored historic state

- level heat input
. Multiplying the projected state

- level emissions rate by historical heat input yields state

- specif ic ozone season EGU NO X emissions for 2018
. Third, the EPA proposes to add an adjustment to account for differences in unit availability between the IPM 2018 run year and 2017, yielding state

- specific ozone season EGU NO X emissions for 2017. Finally, t he E PA then proposes EGU emissions budgets as the minimum of this calculated 2017 emission level or 2014 historic monitored emissions
. This proposed approach reflects the EGU NO X reduction potential described above and grounds the EPA’s quantification of emis sion s budget s in historic al data. The proposed EGU NOx

ozone - season emission s budgets calculated using this approach can be found in Table VI. E

- 1. Tables VI. E

- 2 and VI. E

- 3 provide the EGU NO X ozone - season emissions budget s reflecting EGU NO X158

mitigation available for 2017 at $500 per ton and $3,400 per ton, respectively. Table VI. E - 1. Proposed EGU NO X Ozone - Season Emissions budget s , Reflecting EGU NO X mitigation Available for 2017 at $1,300 per ton

State 2014

Emissions (tons) 2018

$1,300/ton Emission Rate (lbs/MMBtu) 2014 Heat

Input(MMBtu) 2017

Adjustment (tons) 100 2017 EGU

NOx Ozone

Season Emissions budget (tons) Alabama 21,075 0.049 410,477,094 0 9,979 Arkansas 18,135 0.074 185,511,093 51 6,949 Illinois 17,520 0.062 388,382,456 9 12,078 Indiana 40,247 0.126 447,417,615 0 28,284 Iowa 13,857 0.11 151,989,571 0 8,351 Kansas 12,297 0.12 154,921,650 0 9,272 Kentucky 33,896 0.102 380,694,315 2,169 21,519 Louisiana 18,278 0.097 326,662,000 17 15,807 Maryland 4,026 0.05 86,239,563 2,669 4,026 Michigan 25,065 0.112 307,723,171 1,836 19,115 Mississippi 10,229 0.069 172,406,970 0 5,910 Missouri 31,235 0.086 330,006,788 1,210 15,323 New Jersey 2,746 0.036 112,887,439 0 2,015 New York 5,547 0.038 235,619,397 0 4,450 North Carolina 16,759 0.078 315,255,877 0 12,275 Ohio 32,181 0.073 457,251,027 0 16,660 Oklahoma 16,215 0.144 236,715,186 154 16,215 Pennsylvania 44,551 0.057 508,608,673 0 14,387 Tennessee 8,057 0.056 196,132,311 0 5,481 Texas 58,492 0.079 1,474,773,212 33 58,002 Virginia 9,695 0.076 179,324,728 0 6,818 West Virginia 29,420 0.084 317,087,558 0 13,390 Wisconsin 9,087 0.054 205,305,933 0 5,561

100 The entire 2017 Adjustment listed is not used in calculating for Maryland and Oklahoma because it would push their budget above their 2014 emissions.159

23 State Region 478,610 7,581,393,627 311,867

Table VI. E - 2. Proposed EGU NO X Ozone - Season Emissions budget s, Reflecting EGU NO X mitigation Available for 2017 at $500 per ton

State 2014

Emissions (tons) 2018

$500/ton Emission Rate (lbs/MMBtu) 2014 Heat

Input(MMBtu) 2017

Adjustment (tons) 101 2017 EGU

NOx Ozone

Season Emissions budget (tons) Alabama 21,075 0.058 410,477,094 0 11,886 Arkansas 18,135 0.075 185,511,093 51 7,038 Illinois 17,520 0.062 388,382,456 23 12,144 Indiana 40,247 0.15 447,417,615 0 33,483 Iowa 13,857 0.113 151,989,571 0 8,614 Kansas 12,297 0.12 154,921,650 0 9,278 Kentucky 33,896 0.149 380,694,315 4,463 32,783 Louisiana 18,278 0.097 326,662,000 17 15,861 Maryland 4,026 0.05 86,239,563 2,672 4,026 Michigan 25,065 0.131 307,723,171 1,836 22,022 Mississippi 10,229 0.071 172,406,970 0 6,083 Missouri 31,235 0.086 330,006,788 1,123 15,380 New Jersey 2,746 0.036 112,887,439 0 2,016 New York 5,547 0.039 235,619,397 0 4,607 North Carolina 16,759 0.078 315,255,877 0 12,278 Ohio 32,181 0.088 457,251,027 0 20,194 Oklahoma 16,215 0.156 236,715,186 154 16,215 Pennsylvania 44,551 0.15 508,608,673 0 38,270 Tennessee 8,057 0.056 196,132,311 0 5,520 Texas 58,492 0.083 1,474,773,212 0 58,492 Virginia 9,695 0.078 179,324,728 0 6,955 West Virginia 29,420 0.145 317,087,558 0 22,932 Wisconsin 9,087 0.054 205,305,933 0 5,588

101 The entire 2017 Adjustment listed is not used in calculating for Maryland, Oklahoma, and Texas because it would push their budget above their 2014 emissions.1 60

23 State Region 478,610 7,581,393,627 371, 665

Table VI. E - 3 . Proposed EGU NO X Ozone - Season Emissions budget s, Reflecting EGU NO X mitigation Available for 2017 at $3,400 per ton

State 2014

Emissions (tons) 2018

$3,400/ton Emission Rate (lbs/MMBtu) 2014 Heat

Input(MMBtu) 2017

Adjustment (tons) 102 2017 EGU

NOx Ozone

Season Emissions budget (tons) Alabama 21,075 0.048 410,477,094 0 9,931 Arkansas 18,135 0.065 185,511,093 51 6,101 Illinois 17,520 0.062 388,382,456 0 11,992 Indiana 40,247 0.123 447,417,615 0 27,585 Iowa 13,857 0.107 151,989,571 0 8,118 Kansas 12,297 0.12 154,921,650 0 9,259 Kentucky 33,896 0.099 380,694,315 2,169 20,945 Louisiana 18,278 0.094 326,662,000 17 15,378 Maryland 4,026 0.05 86,239,563 2,523 4,026 Michigan 25,065 0.108 307,723,171 1,978 18,624 Mississippi 10,229 0.064 172,406,970 0 5,487 Missouri 31,235 0.083 330,006,788 1,500 15,240 New Jersey 2,746 0.036 112,887,439 0 2,011 New York 5,547 0.037 235,619,397 0 4,391 North Carolina 16,759 0.068 315,255,877 0 10,705 Ohio 32,181 0.073 457,251,027 0 16,637 Oklahoma 16,215 0.137 236,715,186 146 16,215 Pennsylvania 44,551 0.056 508,608,673 0 14,358 Tennessee 8,057 0.056 196,132,311 0 5,449 Texas 58,492 0.076 1,474,773,212 100 55,864 Virginia 9,695 0.065 179,324,728 0 5,834 West Virginia 29,420 0.078 317,087,558 0 12,367 Wisconsin 9,087 0.054 205,305,933 0 5,511

102 The entire 2017 Adjustment listed is not used in calculating for Maryland and Oklahoma because it would push their budget above their 2014 emissions.161

23 State Region 478,610 7,581,393,627 302, 028

VII. Implementation Using the Existing CSAPR NO X Ozone - Season Allowance Trading Program and Relationship to Other Rules
A. Background This section describes implementing and enforcing the budgets quantified in section VI
. In the 4

- step CSAPR methodology previously described, once emission reduction potential is quantified into emissions budgets, the remaining step is to identi fy an approach for ensuring that such reductions occur and are enforceable. As discussed previously, EPA is proposing implement the budgets to address the 2008 ozone NAAQS using the existing CSAPR trading program that allows limited interstate trading amon g states participating in the

ozone - season trading program. The EPA proposes to revise the existing budgets, developed to address transport as to the 1997 ozone NAAQS, where necessary to reflect the additional reductions that the EPA identified as necessar y to address transport as to the 2008 NAAQS. The EPA will implement the trading program in each affected state through the issuance of a
FIP. In electing to propose to implement these near

- term EGU reductions for the 2008 ozone standard using the existing CSAPR162

trading infrastructure, the EPA considered the many significant advantages of continuing to use the existing CSAPR program, including the ease of transition to the new budgets, the economic and administrative efficiency of trading approaches, and the flexibility afforded to sources regarding compliance. The EPA also considered views expressed by some stakeholders that a complementary short

- term (e.g., 30

- day)
rate

- based limit would ensure that control measures adopted to meet the revised budgets conti nue to operate over time. Some

s takeholders have observed, for example, that some existing SCR and SNCR units may not have operat ed in recent years because
CAIR allowance prices are below the operating costs of the controls. The EPA notes that in such cases, the CAIR emissions budget s that states were required to meet to address significant contribution for the 1997 NAAQS were in fact still being met. The EPA will also evaluate power sector behavior for 2015, the first year of CSA PR implementation , and provide that assessment for the final rule
. The EPA expects that certain aspects of this proposal will alleviate some of these concerns. In particular, this proposal is aimed at establishing new, lower emissions budgets that are calc ulated based on a uniform cost that is reflective of , among other things, operating those controls. Furthermore, as described later in this notice, we are p r oposing adjustments to the CSAPR regulations that, if adopted, would163

address the role that the bank ed allowances may play in allowance prices . For these reasons, the EPA does not believe that including a short

- term complementary rate

- based limit in the proposed FIPs is necessary. Nevertheless, we invite comment on the need for such an approach and, from commenters arguing that it is needed, we invite suggestions for calculating it. As explained in greater detail in section IV , under CAA sections 110(a)(1) and 110(a)(2), each state is required to submit a SIP that provides for the implementation, maintenance, and enforcement of each primary or secondary NAAQS. According to section 110(a)(2)(D)(i)(I), the SIP for each state, regardless of a state’s designation status for the relevant NAAQS, must prohibit sources or other types of emissions activity from emitting any air pollutant in amounts that will "contribute significantly to nonattainment" of the standard in a downwind state or "interfere with maintenance" of the standard in a downwind state. Section IV also explains in detail that the EPA is obligated to promulgate FIPs when we find that a state fails to submit a complete SIP or the EPA disapproves a SIP submittal. The EPA recognizes that several states included in this proposal have submitted transport SIPs to address the 2008 ozone standard that the EPA is reviewing, and it is possible that additional states may submit SIPs in the future. As explained in section I V above, the EPA may only finalize FIPs for states164

where FIP authority exists; that is, for states where either the EPA found that the state failed to submit a complete transport SIP or where the EPA has disapproved a transport SIP submittal for that state. T he EPA intends to finalize these proposed FIPs together in a single action and , to the g reatest extent possible, the EPA inte nds to take final action on SIP submittals currently before the agency prior to finalizing this proposal. In the event that a state plans to revise its SIP or submit a SIP prior to any final rule, contact your regional office to alert the EPA. By this action, the EPA is proposing federal implementation plans with respect to the 2008 ozone NAAQS for each state potentially covered by this rule. Section VI above describes the EPA’s approach to defining state

- level EGU emiss ions budget s that represent the EGU emissions remaining after reducing that state’s significant contribution to downwind nonattainment and/or interference with maintenance. The EPA is proposing to implement these EGU emissions budget s in the FIPs through t he
CSAPR EGU NO X ozone - season trading program. When the EPA finalized CSAPR in 2011 under the good neighbor provision of the CAA to reduce emissions of SO 2 and NO X from power plants in eastern states, the rule put in place regional trading programs to quickly and cost

- effectively address pollution that affects air quality in downwind states.165

The EPA envisioned that the methodology could be used to address transport concerns under other existing NAAQS and future NAAQS revisions. See 76 FR 48211 and 48246, August 8, 2011. Accordingly, t he EPA proposes to use the CSAPR ozone

- season trading program and related provisions as codified under 40 CFR Part 97 , Subpart BBBBB an d section 52.38, as amended in this proposal, to implement the proposed EGU NO X ozone - season emissions budget s for the 2008 ozone NAAQS. This program will be initially implemented in each state through a FIP. In this notice, the EPA proposes that the first control period for the requirements is the 2017 ozone season. A covered

s tate would be required to demonstrate compliance with FIP requirements for each subsequent ozone season until it submits, and the EPA approves, a SIP or the EPA promulgates another
f ederal rule replacing the FIP. The EPA notes that the compliance flexibility provided by the CSAPR NO X ozone - season trading program allows sources to demonstrate compliance by holding allowances and does not prescribe unit

- specific and technology

- specific NO X mitigation. In other words, while the EPA quantified EGU NO X reductions resulting from mitigation strategies such as operating or installing (or upgrading to) state

- of

- the

- art combustion controls, no particular reduction strategy is required for any
sp ecific unit because the Act only requires that an upwind166

state’s aggregate emissions neither significantly contribute to nonattainment nor interfere with maintenance of the NAAQS in a downwind state. In practice , the EGU emissions budget s that the EPA is proposing in this action are achievable for each of the 23 states through operating existing SCR and SNCR controls , installing or upgrading to state

- of

- the

- art combustion controls, or shifting generation to low

- NO X emitting units. The EPA believes that this proposed rule provides sufficient lead time to implement these control strategies by the 2017 ozone season. For the EPA’s assessment of the feasibility of controls for 2017, refer to section VI a bove and the EGU NO X Reduction TSD in the docket fo r this proposal
. 103 In this section of the preamble, the following topics are addressed: FIP requirements and key elements of the CSAPR trading programs; participation in the CSAPR NO X ozone - season trading program with a new budget; source monitoring and reporting; replacing the FIP with a SIP; title V permitting; and the relationship of this proposed rule to existing programs (NO X SIP Call, CSAPR trading programs, Clean Power Plan (CPP), and other ozone transport programs).

103 The EPA notes that a state can instead require non

- EGU NO X emission reductions through a SIP, if they choose to do so.167

B. F IP Requirements and Key Elem ents of the CSAPR Trading Programs The original CSAPR establishe s a n NO X ozone - season allowance trading program that allow s covered sources within each state to trade allowances with other sources with in the same trading
group. Pursuant to the CSAPR NO X ozone - season trading program,

s ources are required to hold one allowance for each ton of NO X emitted during the ozone season . We propose to use that same regional trading program, with adjusted budgets and certain additional revisions described below , as t he compliance remedy for the proposed FIP s to address the 2008 ozone NAAQS
. The first control period for this updated CSAPR NO X ozone - season trading
program is proposed to begin with the 2017 ozone season , on May 1, 2017
. In this section, t he EPA is proposing to us e the existing
NO X ozone - season allowance trading system that was established under CSAPR in 40 CFR Part 97, Subpart BBBBB, to implement the emission reductions identified and quantified in the FIPs for this action
. 1. Applicability In this proposed rule, the EPA would maintain the applicability provisions in the final CSAPR rule for the NO X

ozone - season trading program (see 40 CFR 97.504)
.168

Under the general applicability provisions of the CSAPR final rule, a covered unit is any stationary fo ssil

- fuel

- fired boiler or combustion t u r bine serving at any time on or after January 1, 2005, a generator with nameplate capacity exceeding 25 MW producing electricity for sale, with the exception of certain cogeneration units and solid waste incineration units (see 76 FR 48273, August 8, 2011, for a discussion on

a pplicability in the final CSAPR rule). The EPA is not proposing any changes to this provision
. 2. State Budgets
Th is propos al includes revisions to 40 CFR Part 97.510 to reflect new budgets for states covered under this proposal as delineated in section VI above
. This includes the NO X ozone season t rading budgets, new unit set

- asides, and Indian country new unit set

- asides for 2017 and b eyond , described in further detail below
. For states already covered by the original CSAPR ozone

season program, the EPA proposes to update CSAPR EGU NO X ozone season budgets to reflect obligations to reduce interstate transport to address the 2008 ozone standard. For states that are newly brought into the CSAPR ozone - season program because emissions from the s tates significantly contribute to nonattainment or interfere with maintenance of the 2008 ozone NAAQS in a downwind state ( i.e., Kans as based on information169

used to develop this proposal ) , the proposal includes a n EGU NO X

ozone - season emissions budget . For states currently in the CSAPR

ozone - season trading program, but not identified as contributing to interstate ozone transport for the 2008 NAAQS ( i.e., Georgia based on information used to develop this proposal ) , participation in CSAPR would continue unchanged pursuant to their previously

- defined obligation (budget) with respect to the 1997 ozone NAAQS. The EPA proposes to establish reduced or new ozone - season emissions budgets for the 23 eastern states affected by the transport rule for the 2008 ozone NAAQS. The EPA proposes to implement these emissions budgets by allocating allowances to sources in those states equal to th e proposed budget s for compliance starting in 2017. T he EPA will establish allowance allocations for the existing units in each state through this rulemaking. Portions of the state budgets will be set aside for new units, and the EPA will use the existing processes set forth in the CSAPR regulations to annually allocate allowances to the new units in each state from the new unit set

- asides. For states that are currently in the CSAPR ozone - season program, but are not affected under this proposed transport ru le for the 2008 ozone NAAQS ( i.e., Georgia based on information used to develop this proposal ) , the EPA will maintain the state’s budget as finalized in the original CSAPR rulemakings.170

3. Allocations of Emission Allowances Pursuant to the CSAPR trading program regulations, a covered source is required to hold sufficient allowances to cover the emissions from all covered units at the source during the control period for the NO X ozone season. The EPA assesses compliance with these allowance

- holding require ments at the source (i.e., facility) level. This section explains that the EPA proposes to allocate a state’s budget to existing units and new units in that state by apply ing the same allocation approach as finalized in CSAPR, based on a unit’s historical heat input and its maximum historical emissions (see 76 FR 48284, August 8, 2011). This section also describes allocation for Tribes, the new unit set

asides and Indian count ry new unit set

- asides in each state, allocations to units that are not operating ; and the recordation of allowance allocations in source compliance accounts.

A. Allocations for E xisting U nits The EPA proposes to implement each state’s EGU NO X ozone - season

em issions budget in the trading program by allocating the number of emission allowances to sources within that state, equivalent to the tonnage of that specific state budget, as shown in section VI. For these 23 states, the EPA would allocate allowances unde r each state’s budget to covered units in that state. The portion of a state budget allocated to existing units171

in that state is the state budget minus the new unit set

- aside and minus the Indian country new unit set

- aside. The new unit
set

- asides are port ions of each budget reserved for new units that might locate in each state or in Indian country in the future. For the existing source level allocations, see the TSD called, “Existing Source Level Allocations for the 2008 NO X Ozone

- season Rule FIPs,” in th e docket for this rulemaking. The methodology used to allocate allowances to individual units in a particular state has no impact on that state’s budget. For the purpose of allocations, an “existing unit” in CSAPR is one that commenced commercial operatio n prior to January 1, 2010. For the 23 states included in this proposed rulemaking for the 2008 ozone NAAQS, the EPA proposes to identify an “existing unit” as one that commenced commercial operation prior to January 1, 2015. EPA has updated information on affected units that have commenced commercial operation prior to January 1, 2015 ( currently defined either as existing units or as new units pursuant to the current CSAPR regulations ) that would allow these units to be considered existing u nits for purposes of allocations and would allow new unit set

- asides to be fully reserved for any future new units in affected states or Indian country. The EPA is not proposing to change the January 1, 2010 date for states that remain in the original CSAP R and are not affected by the changes proposed here (i.e., Georgia with172

respect to the CSAPR NO X ozone - season allowances and all states with respect to CSAPR SO 2 or NO X annual allowances); thus, the only allowance allocations that are proposed to be change d in this rule for any units under any of the CSAPR trading programs are allocations of NO X ozone - season allowances from budgets that are proposed to be revised in this rule. The EPA proposes to follow the original CSAPR methodology for distributing, or al locating, emission allowances to existing units based on the unit’s share of the state’s heat input, limited by the unit’s maximum historical emissions. This approach uses the highest three of the last five years to establish the heat input baseline for ea ch unit, and constrains the unit

- level allocations so as not to exceed the maximum historical baseline emissions during 2007

- 2014. As discussed in the original CSAPR final rule ( see 76 FR 48288

- 9, August 8, 2011), the EPA finds no advantage or disadvantage in this approach that would penalize those units that have already invested in cleaner fuels or other pollution reduction measures. The EPA considers this allocation approach to be fuel

- neutral, control

- neutral, transparent, based on reliable data, and si milar to allocation methodologies previously used in the NO X SIP Call and Acid Rain Program. The EPA requests comments on following the CSAPR approach for existing unit allocations in states covered by this proposed rule as to the 2008 ozone NAAQS.173

For sta tes that have EPA

- approved abbreviated SIP revisions adopting a different allocation methodology for sources located within the state for CSAPR for the 2017 ozone season and beyond, those provisions would address the allocation of revised NO X

ozone - season emissions budgets established under this rule, provided that the SIP revision includes not only specific allocations given the total state budget expected at the time of the SIP revision, but also a methodology for determining allocations from any given to tal state budget. For states that have EPA

- approved full SIP revisions, the EPA proposes to use the EPA

- approved allocation provisions of the state’s SIP revision to allocate allowances to sources in that particular state using the revised emissions budget proposed to address interstate ozone transport for the 2008 NAAQS, again provided that the SIP includes not only specific allocations but a methodology for determining allocations from any given total state budget. Further, where the state regulation approved as a full or abbreviated SIP revision does not contain an allocation methodology but the materials submitted by the state to support EPA’s approval of that regulation as a SIP revision contain the state’s alloca tion method, described in an unambiguous manner, the EPA seeks comment on using that state

- approved methodology to determine the allocations of allowances to sources in the174

state under the FIPs established in this rule. These possible approaches could prev ent a state from needing to submit another SIP revision to implement the same allocation provisions under this rule that the state has already implemented under CSAPR before adoption of this rule. For all other states, the EPA proposes to use the allocati on method previously finalized in the final CSAPR rulemaking as discussed above in this section. These provisions would not prevent any state (one with an EPA

- approved SIP revision or without) from submitting an alternative allocation methodology under the rule for later compliance years. EPA requests comment on this modified allocation approach for states with EPA

- approved SIP revisions under the current rule. b. Allocations for N ew U nits For the purpose of allocations, CSAPR identifies a “new unit” as one th at commenced commercial operation on or after January 1, 2010 , and provides a methodology for allocating emission allowances to new units from new unit set

- asides in each state and to new units that locate in Indian country. See 76 FR 48290

- 48294 (Aug. 8, 2011), for more information. The FIPs that EPA is proposing will incorporate a trading program in which EPA is proposing to define a covered unit as a “new unit” if it commences commercial operation on or after January 1, 2015; if it becomes covered by mee ting applicability criteria175

subsequent to January 1, 2015; if it relocates into a different state covered by this FIP; or if it was an “existing” covered unit that stopped operating for 2 consecutive years but resumes commercial operation at some point the reafter. To the extent that states seek approval of SIPs with different allocation provisions tha n EPA, these SIPs may seek to defin e new units differently
. The EPA further proposes that its trading program will make allocations to each state for new unit s (the new unit set

- aside) equal to a basic minimum 2 percent of the total state budget, plus the projected amount of emissions from planned units in that state (for instance, if planned units in state A are projected to emit 3 percent of the state’s NO X o zone - season emissions budget , then the new unit set

- aside for the state would be set at 5 percent, consisting of the basic minimum 2 percent plus an additional 3 percent for planned units). See 76 FR 48292. New units may receive allocations starting with t he first year they are subject to the allowance

- holding requirements of the rule. If unallocated to new units, set

asides are redistributed to unretired existing units before the compliance deadline. The EPA requests comments on following the CSAPR approac h for new unit allocations under this proposal. (For more detail on the CSAPR new unit set

- aside provisions, see 40 CFR 97.511(b) and 97.512. )176

The EPA notes that applying the CSAPR approach using the data for this proposal results in a new

- unit set

- aside f or New Jersey that is greater than 50% of the total proposed EGU NO X

ozone - season emissions budget for the state. Th is result is influenced by the EPA’s projected emissions rates for new units that are anticipated to come online within state s . The EPA seeks comment on these data, which are available in the IPM documentation in the docket for this proposal. Further, t he EPA seeks comment on whether additional data should be considered

— for example, reported NO X emission rates of recently constructed
new N GCC units in each state. Table VII. B - 1. Proposed EGU NO X Ozone - Season New - unit Set - aside Amounts, Reflecting Proposed EGU Emissions Budgets (tons)

State Proposed EGU NO X Emissions Budgets (tons) New

- unit

set

- aside amount (percent) New

- unit

set

- aside amount (tons) Indian

country set

aside amount (tons) Alabama 9,979 2% 205 Arkansas 6,949 2% 141 Illinois 12,078 5% 591 Indiana 28,284 2% 565 Iowa 8,351 5% 419 8 Kansas 9,272 3% 281 9 Kentucky 21,519 3% 647 Louisiana 15,807 4% 628 16 Maryland 4,026 12% 485 Michigan 19,115 2% 382 19 Mississippi 5,910 10% 590 6 Missouri 15,323 2% 314 New Jersey 2,015 57% 1,151 New York 4,450 2% 93 4 North Carolina 12,275 2% 248 12 Ohio 16,660 2% 337 Oklahoma 16,215 2% 325 16177

Pennsylvania 14,387 7% 1,017 Tennessee 5,481 2% 109 Texas 58,002 5% 2,910 58 Virginia 6,818 27% 1,844 West Virginia 13,390 2% 268 Wisconsin 5,561 2% 121 6 23 State Region 311,867 13,671 154

c. Allocations for Tribes and New Units in Indian Country Tribes are not required to submit tribal implementation plans. However, as explained in the EPA’s regulations outlining Tribal Clean Air Act authority, the EPA is authorized to promulgate FIPs for Indian country as necessary or appropriate to protect air q uality if a tribe does not submit and get EPA approval of a tribal implementation plan. See 40 CFR 49.11(a); see also 42 U.S.C. 7601(d)(4). For this proposed ozone rule, there are no existing affected units in Indian country in the states affected by this rule. Under the current rule, allowances to possible future new units locating in Indian country are allocated by the EPA from an Indian country new unit set

- aside established for each state with Indian country. (See 40 CFR 97.511(b)(2) and 97.512(b).)
Bec ause states generally have no SIP authority in reservation areas of Indian country and other areas of Indian country over which a tribe or EPA has demonstrated that a tribe has jurisdiction , the EPA continues to allocate such allowances to sources locating in such areas of Indian country within a state178

even if the state submits a SIP to replace the FIP. (40 CFR 52.38(b)(5)(v) and (vi) and 52.38(b)(6).) The EPA reserves 0.1 percent of the total state budget for new units in Indian country within that state ( 5 percent of the basic 2 percent new unit set

- aside prior to any increase in a state’s new unit set

aside amount for planned units). Unallocated allowances from a state’s Indian country new unit set

- aside are returned to the state’s new unit set

- aside and allocated according to the methodology described above. The EPA requests comment on following the CSAPR approach for new unit allocations in such areas of Indian country under the transport rule for the 2008 ozone NAAQS. d. Units that do not operate and the n ew unit set

- aside The EPA proposes to continue to apply for purposes of this rule the existing CSAPR provision under which a covered unit that does not operate for a period of two consecutive years will receive allowance allocations for a total of up to fi ve years of

non - operation. 40 CFR 97.511(a)(2). Starting in the fifth year after the first year of non

- operation, allowances allocated to such units will instead be allocated to the new unit set

- aside for the state in which the non

- operating unit is locate d. This approach allows the new unit set

- asides to grow over time. The EPA requests comment on retaining this timeline for allowance allocation for non

- operating units or changing the allowance179

allocation for non

- operating units to, for instance, two years or three years, in which case allowances would revert to the new unit set

- aside in the second or third year after the first of two consecutive years of non

- operation of a unit. 4. Variability Limits , Assurance Levels , and Penalties
I n the original CSAPR , the EPA developed assurance provisions, including variability limits and assurance levels (with associated compliance penalties) , to assure that each state will meet its pollution control obligations and to accommodate inherent year

- to

- year variability in state

- level EGU operations
. The original CSAPR budgets , and the updated CSAPR emissions budget s proposed in this notice, reflect EGU operati ons in an “average year
. ” However, year

- to

- year variability in EGU operations occurs due to the interconnected nature of the power sector and from changing weather patterns, demand growth, or disruptions in electricity supply from other units or from the transmission grid. R ecognizing this, the FIP includes variability limits, which define the amount by which state emissions may exceed the level of the budgets in a given year to account for this variability in EGU operations
. A state’s budget plus its variability limit equals a state’s assurance level, which acts as a cap on each state’s NO X emissions during a180

control period (that is, during the May

- September ozone season in the case of this rule). To establish the variability limits in the original CSAPR, the EPA analyzed historic al state

- level heat input variability as a proxy for emissions variability, assuming constant emission
rates. (See 76 FR 48265, August 8, 2011.) T he variability limit s for ozone

- season NO X in the original CSAPR were calculated as 21 percent of each state’s budget, and these variability limits were then codified in 40 CFR 97.510 along with the state budgets
. Applying the CSAPR approach , t he EPA proposes to set new variability limits applying the same 21 percent figure as determined in the original CSAPR to this rule’ s budgets
. The EPA proposes that the same 21% figure is appropriate to use because variability in state

- level heat input across a multi

- year period is expected to be relatively consistent around long

- term trends. The EPA seeks comment on this approach. Tab le VII . B

- 2 shows the proposed EGU NO X ozone - season emissions budgets , variability limits , and assurance levels for each state
. Table VII. B - 2
. Proposed EGU NO X Ozone - Season Emissions budget s Reflecting EGU NO X mitigation Available for 2017 at $1,300 per ton , Variability Limits , and Assurance Levels (Tons)

State EGU NOx Ozone

Season Emissions budget s Variability Limits EGU NOx Ozone

Season Assurance Levels Alabama 9,979 2,096 12,075 Arkansas 6,949 1,459 8,408 Illinois 12,078 2,536 14,614 Indiana 28,284 5,940 34,224181

Iowa 8,351 1,754 10,105 Kansas 9,272 1,947 11,219 Kentucky 21,519 4,519 26,03 8 Louisiana 15,807 3,3 19 19, 126 Maryland 4, 026 8 45 4,871 Michigan 19,115 4,014 23,129 Mississippi 5,910 1,241 7,151 Missouri 15,323 3,218 18,541 New Jersey 2,015 423 2,438 New York 4,450 935 5,385 North Carolina 12,275 2,578 14,853 Ohio 16,660 3,499 20,159 Oklahoma 16, 215 3, 405 19, 620 Pennsylvania 14,387 3,021 17,408 Tennessee 5,481 1,151 6,632 Texas 58,002 12,180 70, 182 Virginia 6,818 1,432 8,250 West Virginia 13,390 2,812 16,202 Wisconsin 5,561 1,168 6,729 Region cap 311,867 65,493
The assurance provisions include penalties that are triggered when the state emissions as a whole exceed its assurance level. The original CSAPR provide d that a state that exceeds its assurance level in a given year is assessed a total of 3

- to

- 1 allowance surrender on the excess tons. E ach excess ton above the assurance level must be met with one allowance for normal compliance plus two additional allowanc es to satisfy the penalty. The penalty is designed to deter state

- level emissions from exceeding assurance levels. This was referred to in the original CSAPR as air quality

- assured trading that account s for variability in the electricity sector but also en sure s that the182

necessary emission reductions occur within each covered state. If a state does not exceed its assurance level, no penalties are incurred by any source. Establishing assurance levels with compliance penalties therefore responds to the court’s holding in North Carolina requiring the EPA to assure that sources in each state were required to eliminate emissions that significantly contribute to nonattainment and interfere with maintenance of the NAAQS in another state. 104 To assess the penalty und er the assurance provisions , the EPA evaluates whether any state’s total EGU emissions in a control period exceeded the state’s assurance level, and if so, the EPA then determines which owners and operators of units in the state will be subject to an allowance surrender requirement based on each source’s emissions as compared to its unit

- level assurance level. Since a single designated representative (DR) often r epresents multiple sources, the EPA evaluates which groups of units at the common DR level had emissions exceeding the respective common DR’s share of the state assurance level, regardless of whether the individual source had enough allowances to cover its emissions during the control period. This provision is triggered only if two criteria are met: (1) the group of sources and units with a common DR are located in a

104 531 F.3d at 908.183

state where the total state EGU emissions for a control period exceed the state assurance l evel; and (2) that group with the common DR had emissions exceeding the respective DR’s share of
the state assurance level. For more information on the CSAPR assurance provisions see 76 FR 48294 ( August 8, 2011 )
. 5. Implementation Approaches for Transitioning the Existing
CSAPR NO X Ozone

- season Program to Address Transport for a Newer NAAQS Consistent with the original CSAPR approach , EPA proposes that in this updated rulemaking, EGUs would be able to trade NO X

ozone - season emission allowances among units within the state and across state boundaries, with emissions and use of allowances limit ed by the assurance provisions. The following sections describe approaches to transition the existing CSAPR
program designed for the 19 97 ozone NAAQS to address interstate ozone transport for the 2008 ozone NAAQS. A primary focus of this section is the extent to which allowances created to address interstate transport with respect to the 1997 ozone NAAQS , reflecting emissions budgets at $500 per ton , are fungible with allowances created under this proposal to address interstate transport for the 2008 ozone NAAQS , reflecting emissions budgets at $1,300 per ton. The EPA proposes that these implementation too ls are not presumptively184

equivalent, given that they were developed to address ozone transport under different NAAQS and using different cost thresholds. However, as further discussed below, the EPA is proposing approach es under which allowances allocated under budgets established to address the 1997 NAAQS could be used for compliance for addressing interstate transport for the 2008 NAAQS, subject to specific limitations
. The EPA is also taking comment on several other approaches for addressing the transit ion from a program in which all budgets were established based on an integrated analysis using a single control cost threshold to address the 1997 NAAQS to a program with a mix of budgets established in independent analyses using different control cost thr esholds, in some cases to address the 1997 NAAQS and in other cases to address the 2008 NAAQS.

a. Use of CSAPR Ozone

- season Trading Program Bank in the
T ransport R ule for the 2008 O zone NAAQS Trading Program Since CSAPR was promulgated in 2011, the U.S. electric sector has undergone considerable transformation primarily due to economic and market forces precipitated by the natural gas boom. For example, Henry Hub natural gas prices reached below $2.00 per mill ion BTU in 2012 and were in the $2.00

- $3.00 range for most of 2012. These prices are below the level initially anticipated when establishing the phase 1 and 2 budgets, and have made the operation of lower emitting units more185

competitive, putting more down ward pressure on emissions. There has also been turnover in the power generation fleet as newer, lower emitting sources replace older, higher emitting sources, putting further downward pressure on emissions. A pproximately 28.5 GW of coal units retired fro m the fleet between 2012 and June of 2015. In addition, demand growth has slowed ; a majority of U.S. states have implemented renewable portfolio standards and other energy efficiency programs ; and high

- efficiency building designs, residential energy conse rvation, roof

- top solar , and other forms of distributed generation have grown. In combination, these factors have significantly reduc ed EGU NO X emissions between 2012 and 2015
. As a result of protracted litigation, CSAPR implementation was delayed by thre e years, from 2012 to 2015. Due to this delay , combined with the market forces and changes that took place during that timeframe , e xpectations are that total banked allowances for the CSAPR o zone - season t rading p rogram could be in excess of 2 1 0,000 tons by the start of the 2017 ozone - season compliance period , which is more than twice the emission reduction potential estimated at the $1,300 per ton control level described in section VI above
. This number was estimated by comparing recent measur ed emission levels to the original
CSAPR NO X ozone - season phase 1 emissions budgets, assuming EGU186

emissions in CSAPR NO X ozone - season states for 2015 and 2016 would continue at 2014 levels. 105
The use of allowance b anks generally provide a glide path for sources required to meet more stringent emission limits in later years and accommodate year - to

- year variability in operation. However, allowing unrestricted use of the large number of banked allowances for compliance with this new rule could result in regional 2017 ozone season NO X emissions that exceed the collective state budgets quantified in this rule to address transported air pollution with respect to the 2008 ozone standard
. While the assurance provisions included in CSAPR do limit the ultimate a mount of pollution that may occur in these states in 2017 (i.e., no matter how large an allowance bank may exist, only a portion of that bank may be used in a state in any given year without exceeding the assurance levels and incurring penalties ) , unrestricted use of the bank in this situation could allow emissions to exceed the state budgets, up to the assurance level, year after year. As described in CSAPR, the flexibility provided by the assurance provisions is not designed to be used repeated ly, year after year. Rather, the use of banked allowances is intended to be limited by binding emissions budgets such that drawing down

105 This data analysis relies on 40 CFR Part 75 emissions reporting data as available in EPA Air Markets Program Data available at http://ampd.epa.gov/ampd/187

the bank in one year is only possible because of actions taken to build up the bank in a previous year. Moreover, a rela tively large allowance bank that enables emissions budget s to be exceeded year after year may encourage sources to postpone emission reductions that would be more timely in the 2017 timeframe in order to align reductions with the downwind area attainment d ates for the 2008 ozone NAAQS. The EPA is proposing and taking comment on a range of options for how to treat the use of banked 2015 and 2016 CSAPR
NO X ozone - season allowances by units in the 23 states with new or updated budgets in this proposal. The use of banked allowances by s tates that are not included in the proposed FIPs to address ozone transport under the 2008 NAAQS (i.e., Georgia for CSAPR NO X

ozone - season program and all states for CSAPR SO 2 and NO X annual programs) would not be affected by thes e options. The EPA is proposing that allowances issued for compliance in 2015 and 2016 under CSAPR may be used for compliance under the updated CSAPR from 2017 forward in order to smooth implementation in the first few years under the new budgets.
However , t he EPA is proposing to impose certain limits on the use of these banked allowances starting in 2017 . Specifically, the EPA is proposing that sources in the 23 states with new or updated budgets in this proposal m ay use all of their banked allowances, but at a tonnage authorization level significantly188

lower than one ton per allowance. This would be realized through a surrender ratio greater than one pre - 2017 allowances (vintage 2015 or 2016) to cover one ton of NO X emitt ed in 2017 and each year thereafter
. The surrender ratio, such as four

for

- one or two

- for

- one, would require more than one pre

- 2017 banked allowance to be used for each ton of ozone season NOx emitted in 2017 and beyond. This would have the dual effect o f carrying over the banked allowances into the new program to promote program continuity, while also recognizing the environmental objectives of the updated ozone NAAQS for 2008 and the corresponding new state emission budgets designed to help move air qua lity towards compliance with that NAAQS standard. A surrender ratio would respect the flexibility of sources to operate at their assurance levels in the program’s early years, but would reduce the ability for the collective EGU fleet to repeatedly exceed the emissions budget year after year. Finally, EPA believes a surrender ratio is appropriate as it reflects the fact that tighter budgets will put upward pressure on allowance value in the future. Therefore, fewer allowances will be needed to reach the sa me value of a current allowance holding, making a surrender ratio a natural complement to carrying over the value of the banked allowances in a program where more stringent emission budgets are replacing less stringent emission budgets.189

EPA is proposing a surrender ratio greater than one

- for

one, such as two

- for

- one or four

- for

- one . For analytic purposes in this rulemaking, it reflects the four

- for

- one surrender ratio
to illustrate one potential surrender ratio . However, in the final rule, EPA would update this assumption to reflect the surrender ratio finalized. This ratio of four or two banked allowances to one ton of emissions is derived from the ratio of the anti cipated allowance bank in 2017 (approximately 2 10,000 allowances ) to the ozone

season variability limit (i.e., the difference between the sum of the emissions budgets for all 23 states and the sum of the assurance level s for all 23 states ; approximately 6 0 ,000 tons ) or the ozone season variability limit multiplied by two (120,000 tons) , rou nded to the nearest whole number. The EPA identified this approach to limit the emissions impact of using banked allowances to the magnitude of all states emitting up to the ir assurance level s for one or two year s . The variability limit respects the upper bound variation in emissions and load EPA would expect in any given year. Thus, the carryover of banked allowances equal to one or two year s ’ worth of variability limits provides the affected fleet with the ability to accommodate potential variation from the mean in its load and emission patterns in the first year s of the program , while balancing the need to ensure that emissions are reduced, on190

average, to the level of the budgets and within the assurance levels in subsequent years. The EPA believes that a surrender ratio approach provides a means for the existing CSAPR EGU NO X ozone - season allowances to retain some value, while appropriately mitigating the potential adverse impact of the allowance bank on the emissi on - reducing actions needed from affected units in states with obligations to address interstate transport for the 2008 ozone NAAQS. The EPA seeks comment on a surrender ratio approach and on the use of a ratio , such as two

- for

- one or four

- for

- one , and whether a n alternative ratio would be appropriate
. The EPA is also soliciting comment on another approach that we believe could achieve these same goals (i.e., valuing the anticipated CSAPR allowance bank while promoting near

- term emission reductions). Und er this alternative approach, the EPA would issue fewer allowances than the tons quantified in state budgets for the 23 states affected by this rulemaking in the first three years of program implementation (i.e. 2017, 2018, and 2019) . This approach recogni zes that 2015 and 2016 allowances are available to sources for compliance and would allow use of those banked CSAPR NO X ozone allowances at a one - to

one turn

- in ratio (i.e., one allowance is surrendered for one ton of emissions) . By reducing overall alloc ations for a period191

of time, the impact of states using those banked allowances on emission levels would be mitigated. The EPA seeks comment on what percentage (below 100 percent) of allowances to issue , and over what number of years, under this alternative approach. As a specific example , the EPA seeks comment on implementing this approach in a manner such that the EPA would issue allowances to sources within each of the 23 states with updated budgets under this proposal at a level of 8 5 percent of the proposed emissions budgets for the first three years that the new budgets are effective
. Using the proposed EGU NO X ozone - season emissions budget of 9 , 979 tons for Alabama as an example, this would mean issuing approximately 8,482 allowances for each of the 2017 through 2019 (inclusive) control periods (and the full budget for each subsequent control period)
. Applying this approach to all 23 states with updated budgets under this proposal (which sum to 3 12 , 824 allowances ) would mean that EPA would issue approximately 266,900 allowances across those states in each of the 2017, 2018, and 2019 control periods. EGUs in those states would be able to use allowances from the anticipated 210 ,000 allowance bank in addition to allowances issued for these yea rs in order to comply with the updated CSAPR emission requirements
. A llocating approximately 266 , 900 allowances for the first three years of the updated requirements would , based on current estimates, result in192

approximately 47 ,000 banked allowances used for compliance each
year. This would leave approximately 7 0,000 banked allowances , which is roughly equivalent to the regional variability limit (i.e., the difference between the states’ collective emissions budgets and their collective assurance level s )
. As under the illustrative four

- for

- one surrender ratio option, the remaining
amount of banked allowances that would remain after using this initial reduced allocation is approximately the amount of banked allowances that would allow all states to emit up t o their assurance level s for one year. The EPA also seeks comment on what other percentages of the budget and time

- frame s could be appropriately used to implement this alternative approach. As in the specific example above, the
EPA would seek a combination of time and recordation percentage such that the ultimate influence of the anticipated allowance bank is limited to approximately the regional variability limit (i.e., the difference between the collective emissions budgets and the collective assurance level s )
. Under either approach, the EPA would conduct unit

- level allowance allocation s in the same manner as described above, such that each unit ’s share of its state’s total allowances issued is determined by that allocation approach whether the EPA issues allowances in the full amount of the state budget with a surrender ratio for banked allowances or in a lesser amount to193

address the potential effect of the allowance bank (as entertained in this alternative on which we are inviting comment). In other words, the effect of this alternative approach would be to reduce unit

- level allowance allocations in those years in a proportional manner (e.g., all unit

- level allowance allocations would decrease by the same percentage as the reduction in total allowances issued below that state’s budget). Additionally, the EPA is soliciting comment on less and

more restrictive approaches to address use of the CSAPR EGU NO X ozone allowance bank. Specifically, the EPA seeks comment on: (1) allowing banked 2015 and 2016 CSAPR NO X ozone allowances to be used for compliance with the proposed budgets for the 2008 ozone NAAQS starting in 2017 at a 1

- to

- 1 ratio, or (2) completely d isallowing the use of banked 2015 and 2016 CSAPR NO X ozone allowances for compliance with the proposed budgets for the 2008 ozone NAAQS starting in 2017. The EPA is also soliciting comment on whether and how the assurance provision penalty might be increas ed, in conjunction with any of the above approaches, to address the relationship of the allowance bank to emissions occurring under this revised program from 2017 onward.

B. Use of CSAPR NO X Ozone

- season Allowances from States Addressing the 1997 Ozone NAAQS for Compliance in States Addressing the 2008 Ozone NAAQS194

Consistent with the original CSAPR, EGUs covered by the seasonal NO X budget trading program that will be incorporated into these proposed FIPs are able to trade NO X ozone - season emission allowances among units within the state and across state boundaries, with emissions and the use of allowances limited by the assurance provisions. The EPA is considering how to transition allowance trading between the group of states that are in the CSAPR NO X ozone season program with respect to the 1997 ozone NAAQS but will not have updated emissions budgets proposed in this action (e.g., Georgia based on this proposal) and the group of states for which the EPA is proposing to establish new or lower budgets to address the 2008 ozone NAAQS in this action. The EPA believes that , where appropriate and feasible, continuity of programs is important, particularly for market

based and other power sector regulati ons, as this sector makes long

- term investment and operational decisions. However, CSAPR allowances issued under budgets established to address the 1997 ozone NAAQS using a $500 per ton cost threshold in one state may not be appropriately valued to reduce interstate ozone transport in another state for the 2008 NAAQS under this proposal where budgets are being established using a $1,300 per ton cost
threshold. In the original CSAPR rulemaking, the EPA discussed the concern that allowing unrestricted trading between groups of195

states whose budgets were established using different cost thresholds would impact whether the necessary emission reductions would be achieved within each state. 106 The assurance provisions used in CSAPR provide some assurance that emission reductions will occur within each state, but in the CSAPR rulemaking the EPA acknowledged concerns that the assurance provisions alone may not be sufficient. Consistent with those previously acknowledged concerns , the EPA is proposing in this rule not to allow these two groups of states to trade without some additional assurances that the emission reductions will be appropriately achieved within each state. However, b ecause of the r elatively small size of the group of states with budgets set using the $500 per ton cost threshold, the EPA is not proposing to prohibit altogether trading between the two groups in this instance
. The EPA does not expect that a single state ( i.e., Georgia) would drastically influence emission reductions in the other 23 states covered by this proposed rule. EPA is instead proposing to permit trading between the two groups of ozone states subject to certain restrictions on trading. In particular, the EPA is p roposing to require that sources in states addressing the 2008 ozone NAAQS under this proposal may use allowances issued in states only

106 76 FR at 48263

- 64.196

addressing the 1997 ozone NAAQS via the CSAPR trading programs (e.g., Georgia) at a rate of 2.5 allowances for each ton of NO X emitted. The EPA proposes a ratio of 2.5

- to

- 1 in order to align with the ratio of the cost of ozone season EGU NO X reduction promulgated in the original CSAPR (i.e., $500 per ton) to the cost proposed for this rule (i.e., $1,300 per ton). The EPA proposes this restriction as sufficient, in conjunction with the assurance provisions, to protect the needed reductions in the 23 states addressing interstate transport for the 2008 ozone NAAQS. The EPA requests comments on this approach
. The EPA also seek s comment on using a different ratio than 2.5

- to

- 1 , and on using the same ratio as the ratio for the use of banked allowances , whether that ratio is 4

- to

- 1 as proposed or a different ratio. The EPA is also seeking comment on allowing trading without distin ction between the particular NAAQS (1997 ozone NAAQS or 2008 ozone NAAQS) for which an upwind state has obligations to reduce transported pollution, and subject only to the constraints of the CSAPR assurance provisions with no additional restrictions. The EPA is soliciting comment on whether and how the assurance provision penalty might be increased in conjunction with this approach. Alternatively, the EPA is seeking comment on separating compliance between groups of upwind states under each NAAQS, whereby the use of NO X ozone - season emission allowances from one197

group (e.g., sources in states only covered for the 1997 ozone NAAQS) would be disallowed for compliance use by units in the other group (e.g., sources in states covered for the 2008 ozone NAAQS) , si milar to the existing separation between the CSAPR SO 2 Group 1 and CSAPR SO 2 Group 2 programs
.

C. Use of CSAPR NO X Ozone

- season Allowances between States with Different Control Stringen cies Address ing the 2008 Ozone NAAQS As discussed in Section VI of this proposal, the EPA notes that the evaluation of EGU NO X requirements for the final rule could show one or more states fully addressing their good neighbor obligation based on ozone season NO X control requirements represent ed by one cost level while one or more other states have ozone season NO X control requirements based on a more stringent cost level. In this situation, the EPA proposes that it would quantify requirements for these different groups of states based on diffe rent uniform control stringencies. However, CSAPR allowances issued under budgets established using a one cost threshold (e.g., $1,300 per ton) in one state may not be appropriately valued to reduce interstate ozone transport in another state where budgets might be established using different cost threshold (e.g., $3,400 per ton). Consistent with the previous discussion (regarding allowances issued in states continuing to address the 1997 ozone NAAQS under budgets198

established using $500 per ton threshold ), the EPA is proposing to permit trading between the se groups of states subject to certain restrictions on trading. In particular, the EPA is proposing to require that sources in states with emissions budgets established using the more stringent cost thresholds (e.g., $3,400 per ton) may use allowances issued in states with emissions budgets established using the less stringent cost thresholds (e.g., $1,300 per ton) at a rate of allowance s for each ton of NO X emitted based on the ratio of these cost thresholds. For example, states with emissions budgets established using $3,400 per ton could use allowances at a rate of approximately 2.5

- to

- 1 in order to align with the ratio of the relevant cost thresholds. The EPA requests comments on allowing the states to trade with the proposed restrictions on the use of allowances by sources in states controlled using the more stringent cost threshold. The EPA is also seeking comment on allowing tradin g without distinction between the particular cost thresholds for which an upwind state has obligations to reduce transported pollution, and subject only to the constraints of the CSAPR assurance provisions with no additional restrictions. The EPA is also

s oliciting comment on whether and how the assurance provision penalty might be increased in conjunction with this approach.199

Alternatively, the EPA is seeking comment on separating compliance between groups of upwind states under each cost threshold , whereby the use of NO X ozone - season emission allowances from one group (e.g., sources in states with allowances issued using the more stringent cost threshold ) would be disallowed for compliance use by units in the other group, similar to the existing separation between the CSAPR SO 2 Group 1 and CSAPR SO 2 Group 2 programs.

D. Summary of Proposed Allowance Surrender Ratios As discussed in sections a
. and b
. above, the EPA proposes that in this updated rulemaking, EGUs would be able to trade NO X

ozone - season emission allowances among units within the state and across state boundaries, with emissions and use of allowances limit ed by the assurance provisions. However, the EPA is proposing to impose certain additional limits on the use of allowances starting in 2017 for EGUs in the 23 states with updated budgets in this proposal. Table VII

- 2 summarizes the limits on the proposed use for CSAPR NO X ozone - season allowances. 107

107 In the regulatory text revisions for this proposal, the proposed limits discussed here are described in terms of the “tonnage equivalent” of an allowance. In the case of 2015 or 2016 vintage allowances used for compliance in a control period in 2017 or later, where 4 allowances would be needed for each ton of emissions, each such allowance would have a tonnage equivalent of 0.25 tons per allowance (1/4 = 0.25). In the case of 2017 or later allowances from a state with an original CSAPR budget used for compliance by a unit in a200

Table VII. B - 2. Proposed Use of CSAPR NO X Ozone - Season Allowances for 2015, 2016, 2017, and Later Allowance Vintages (Tons) Compliance Period and Unit Location of Allowance Use Used for 2015 or 2016 C ompliance

– any state Used for 2017

or later compliance

- unit in state s with updated budget for 2008 ozone NAAQS Used for 2017 or later compliance

– states with original CSAPR emissions budget Vintage Year and State of Allowance Issuance 2015 or 2016 vintage

– any state 1 for 1 4 for 1 1 for 1

2017 or later vintage

– states with updated budget for 2008 ozone NAAQS Not Applicable 1 for 1 1 for 1

2017 or later vintage

– states with original CSAPR emissions budget Not Applicable 2.5 for 1 1 for 1

6. Compliance Deadlines As discussed above at sections II.A., III.B., and IV.A., the proposed rule would require NO X reductions from sources starting May 1, 2017, to ensure that reductions are made as expeditiously as practicable to assist downwind states’

state with an updated budget based on the 2008 ozone NAAQS, where 2.5 allowances would be needed for each ton of emissions, each such allowance would have a tonnage equivalent of 0.40 tons per allowance (1/2.5 = 0 .40). In a case where one allowance is needed for each ton of emissions, such allowances would have a tonnage equivalent of one ton per allowance. See proposed 40 CFR 97.524(f) in the regulatory text for this proposal.201

attainment and maintenance of the 2008 ozone NAAQS. The compliance deadline is coordinated with the atta inment deadline for the relevant NAAQS and, as discussed above, the rule includes provisions to assure that all necessary reductions occur at sources within each individual state. In section VI above, the EPA explains that this is an adequate and reasonabl e time for sources to plan for compliance and operate necessary controls. For states for which EPA has already established a FIP requiring their units to participate in the CSAPR NO X ozone season trading program because of transport obligations under the 1 997 ozone NAAQS, no CFR changes are necessary to accommodate this compliance deadline. The EPA proposes to amend the regulatory text in 40 CFR section 97.506(c)(3) to reflect the 2017 start of compliance obligations for units in states that were not previo usly subject to the CSAPR NO X ozone - season trading program (e.g., Kansas). The EPA also proposes to amend various FIP provisions in 40 CFR Part 52 to indicate the start and end of compliance obligations under the FIPs for sources in states added to the tra ding program under this rule (e.g., Kansas) or removed from the trading program in response to the D.C. Circuit’s remand of certain NO X ozone - season emissions budget s (e.g., Florida and South Carolina). These revisions are202

shown in the proposed regulatory text at the end of this preamble. 7. Monitoring and Reporting and the Allowance Management System Monitoring and reporting in accordance with the provisions of 40 CFR Part 75 are required for all units subject to the
CSAPR NO X ozone - season trading programs and would also be required for all units covered under the proposed transport rule for the 2008 ozone NAAQS requirements. The EPA proposes that the monitoring certification deadline by which monitors are installed and certified for compli ance use generally would be May 1, 2017 , the beginning of the first compliance period proposed in this rule , with potentially later deadlines for units that commence commercial operation after July 1, 2016
. Similarly, the EPA proposes that the first calend ar quarter in which quarterly emission reporting is required would generally be the quarter including May 1, 2017. These deadlines are analogous to the current deadlines under CSAPR but are delayed by two years to reflect the fact that this rule’s initial implementation year would be two years later than the existing CSAPR programs’ initial implementation year. Under Part 75, a unit has several options for monitoring and reporting, namely the use of a CEMS; an excepted monitoring methodology based in part on fuel flow metering for certain gas -203

or oil

- fired peaking units; low

- mass emissions monitoring for certain non

- coal

- fired, low emitting units; or an alternative monitoring system approved by the Administrator through a petition process. In addition, sources can submit petitions to the Administrator for alternatives to specific CSAPR and Part 75 monitoring, recordkeeping, and reporting requirements. Each CEMS must undergo rigorous initial certification testing and periodic quality assurance t esting thereafter, including the use of relative accuracy test audits (RATAs) and 24

- hour calibrations. In addition, when a monitoring system is not operating properly, standard substitute data procedures are applied and result in a conservative estimate o f emissions for the period involved. Further, Part 75 requir es electronic submission of a quarterly emissions report to the Administrator, and in a format prescribed by the Administrator. The report would contain all of the data required concerning ozone s eason NO X emissions. Units currently subject to CSAPR NO X ozone - season or CSAPR
NO X annual trading program requirements monitor and report NO X emissions in accordance with Part 75, so most sources would not have to make any changes to monitoring and reporting practices. In fact, only units in Kansas currently subject to the CSAPR NO X annual trading program but not the CSAPR NO X ozone - season trading
program would need to start newly reporting ozone season NO X mass emissions. These emissions are already measured under the annual204

program , so the change would be a minor reporting modification
. Units in the following states monitor and report NO X emissions under the CSAPR NO X ozone - season trading program and would continue to do s o without change under the CSAPR ozone update for the 2008 NAAQS: Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Michigan, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma , Pennsylvania, Tennessee, Texas, Virginia, West Virginia, and Wisconsin. 8. Recordation of Allowances The EPA proposes to update the deadlines by which EPA would record allowances for the CSAPR NO X ozone - season trading program for the compliance periods in the years from 2017 through 2022
. The proposed new dates would amend the recordation deadlines in 40 CFR 97.521 as shown in the proposed regulatory text amendments at the end of this proposal. The existing recordation provisions require EPA to record either FIP

- based (i.e., governed by part 97) or SIP

- based allocations for 2017 and 2018 by July 1, 2016. The EPA proposes to delay this deadline to December 1, 2016. The extension would allow EPA to finalize any changes to the state budgets for the 2017 compliance period before recording 2017 allowances
. This would prevent the need to take back allowances that were recorded under existing budgets in cases where state budgets are reduced. The extended205

deadline would still allow allocations to be recorded five months prior to the start of the 2017 compliance period , giving affected units time to make compliance plans. Compliance true

- up for the 2017 ozone season occurs after December 1, 2017 , so affected sources would have more than a year from the extended recordation deadline to ensure th ey hold enough allowances for 2017 ozone season compliance. The EPA is taking comment on this new deadline for 2017 and 2018 allowance allocation recordation. The EPA is also taking comment on whether the provision to delay 2017 and 2018 allocation recorda tion should be finalized ahead of final action on this full proposal if this proposal is not finalized before July 1, 2016. The EPA is also proposing to extend the existing deadlines for recording CSAPR NO X ozone - season allowances for the 2019 and 2020 compliance periods and for the 2021 and 2022 compliance periods each by one year, to July 1, 2018, and July 1, 2019, respectively. The purpose of these proposed deadline extensions is to provide time for states to submit SIP revisions to modify or replace the FIPs proposed in this rule on schedules comparable to the schedules for the SIP revision options that the states have under the current CSAPR regulations. The EPA seeks comment on extending these recordation deadlines as discussed.206

C. Submitting a SIP
As noted earlier in this section VII I , s tates may replace the FIP with a SIP at any time if approv ed by the EPA . “Abbreviated” and “full” SIP options continue to be available. An “abbreviated SIP” allows a state to submit a SIP that would modify allocation p rovisions in the NOx budget trading program that is incorporated into FIP to allow the state to substitute its own allocation provisions. A second approach, referred to as a full SIP, allows a state to adopt a trading program meeting certain requirements that would allow sources in the state to continue to use the EPA

- administered trading program through an approved SIP, rather than a FIP. In addition, as under CSAPR, EPA proposes to provide states with an opportunity to adopt
state

- determined allowance al locations for existing units for the second compliance period under this rule

– in this case, the 2018 compliance period

– through streamlined SIP revision s . See 76 FR 48326

- 48332 for additional discussion on full and abbreviated SIP options and 40 CFR 52. 38(b). 1. 2018 SIP O ption As under CSAPR, the EPA proposes to allow a state to submit a SIP revision establishing allowance allocations for existing units for the second year of the new requirements, 2018 , to replace the FIP

- based allocations
. The process wo uld be the same as under the current rule with deadlines shifted207

roughly 2 years

— i.e., a state would submit a letter to EPA by November 15, 2016 indicating its intent to submit a complete SIP revision by April 1, 2017. The SIP would provide in an EPA

prescribed format a list of existing unit s and their allocations for the 2018 control period. If a state does not submit a letter of intent to submit a SIP revision , FIP allocations would be recorded by December 1, 2016 . If a state submits a timely let ter of intent but fails to submit a SIP revision, FIP allocations would be recorded by April 1, 2017. If a state submits a timely letter of intent followed by a timely SIP revision that is approved, the approved SIP allocations would be recorded by October 1, 2017. 2. 2019 and B eyond SIP O ption For the 2019 control period and later, EPA proposes that the SIP submittal deadline be delayed one year, until December 1, 2017, from the current deadline. The deadline to then submit state allocations for 2019 and 2020 would be June 1, 2018 and the deadline to record those allocations would be July 1, 2018. Under the proposed new deadlines , a state could submit a SIP revision for 2021 and beyond control periods by December 1, 2018 , with state allocations due June 1, 201 9 , and allocation recordation by July 1, 2019. For 2019 control period and later, SIPs can be full or abbreviated SIPs. An allocation methodology approved in an abbreviated SIP submitted for 2017 under the208

existing CSAPR regulations could also apply under the proposed new rule in 2017 and 2018. See above and 76 FR 48326

- 48332 for additional discussion on full and abbreviated SIP options and 40 CFR 52.38(b). 3. SIP R evisions that D o N ot U se the CSAPR T rading P rogram For a transport SIP revision that does not use the CSAPR NO X

ozone - season trading program, EPA would evaluate the transport SIP based on the particular control strategies selected and whether the strategies as a whole provide adequate and enforceable provisions ensuring that the emission reductions will be achieved. The SIP revision at a minimum should include the following general elements: (1) a comprehensive baseline 20 17 statewide NO X emission inventory (which includes growth and existing control requirements), which should be consistent with th e 201 7 emission inventory the EPA would use when finalizing this rulemaking to calculate the required state budget; (2) a list and description of control measures to satisfy the state emission reduction obligation and a demonstration showing when each meas ure would be in place to meet the 2017 compliance date ; (3) fully

- adopted state rules providing for such NO X control s during the ozone season ; ( 4 ) for EGUs greater than 25 MWe and large boilers and combustion turbines with a rated heat input capacity of 250 mmBtu per hour or greater, Part 75 monitoring , and for other units, monitor ing and reporting procedures209

sufficient to demonstrate that sources are complying with the
SIP ; an d ( 5 ) a projected inventory demonstrat ing that state measures along with federal measures will achieve the necessary emission reductions in time to meet the 2017 compliance deadline
. 108 The SIPs must meet the requirements for public hearing, be adopted by the appropriate board or authority, and establish by a practically enforceable regulation or permit a schedule and date for each affected source or source category to achieve compliance
. Once the state has made a SIP submission, the EPA will evaluate the submission(s) for completeness. The EPA's criteria for determining completeness of a SIP submission are codified at 40 CFR part 51 appendix V. For further information on replacing a FIP with a SIP, see the discussion in the final CSAPR rule making ( 76 FR 48326, August 8, 2011 )
. The EPA requests comment on what types of additional information and guidance would be helpful and stands ready to assist states in SIP development
. 4. Submitting a SIP to P articipate in CSAPR for S tates N ot
I ncluded in this P roposal The EPA believes that there could be circumstances where a
state that is not obligated to reduce NO X emissions in order to eliminate significant contribution to nonattainment or

108 The EPA notes that the SIP is not r equired to include modeling.210

interference with maintenance of ozone standards in another state (such as Florida or South Carolina for purposes of this proposal) may wish to participate in the NO X ozone - season trading program in order to serve a different regulatory purpose. For

ex ample, the state may have a pending request for redesignation of an area to attainment that relies on participation in the trading program as part of the state’s demonstration that emissions will not exceed certain levels, or the state may wish to rely on participation in the trading program for purposes of a SIP revision to satisfy certain obligations under the Regional Haze Rule. The EPA seeks comment on whether the EPA should revise the CSAPR regulations to allow the EPA to approve a SIP revision in whic h a state seeks to participate in the NO X ozone season trading program for a purpose other than addressing ozone transport obligations. Further, the EPA seeks comment on the conditions that should apply to any such approval in order to ensure that the state’s participation is consistent with the trading program’s ability to achieve the program’s objectives with respect to interstate transp ort of ozone pollution. The EPA believes that the primary conditions for consideration in this circumstance would be the level of the state emissions budget and what , if
any , limitations would be placed on the use of allowances issued to the sources in tha t state by sources in other states
.211

The EPA specifically seeks comment on whether a presumption of approvability of such a SIP revision should arise, without limitations on the use of corresponding allowances for compliance by sources within that state or in other states , if the state would adopt as part of the SIP revision a NO X ozone season emissions budget no higher than the emissions budgets that the EPA finalizes under this rule. For example, based on this proposal, an emissions budget that reflects EG U NO X mitigation strategies represented by a uniform cost of $1,300 per ton. The EPA notes that such emissions budgets could be developed using the data and analysis used to establish the emissions budgets for this rule. EPA also specifically seeks comment on whether a presumption of approvability of such a SIP revision should arise, with limitations on the use of allowances issued to the state’s sources analogous to the limitations proposed for allowances issued to Georgia’s units in this rule, if the stat e would adopt as part of the SIP revision a NO X ozone - season emissions budget no higher than the base case ozone season NO X emissions that EPA projected for the state in the analysis used to establish the emissions budgets for this rule. The EPA also speci fically seeks comment on whether, in the case of a state previously subject to the CSAPR NO X ozone - season trading program (e.g., Florida or South Carolina), a presumption212

of approvability of such a SIP revision should arise at an emissions level higher tha n the state’s base case emissions in the analysis used to establish the emissions budgets for this rule

– for example, an emissions level equal to the state’s previously promulgated CSAPR budget

– subject to the imposition of trading limitations on allowan ces issued to the state’s units analogous to the limitations proposed for allowances issued to Georgia’s units in this proposal. Finally, the EPA also seeks comment on whether a state whose allowances would otherwise be subject to limitations on use analo gous to the limitations proposed for allowances issued to Georgia’s units in this rule could avoid those limitations by adopting in a SIP revision a more stringent budget reflecting emission levels at higher dollar per ton emission reduction costs comparab le to the dollar per ton emission reduction costs used to establish the budgets for other states in this rule.
D. Title V Permitting The proposed rule , like CSAPR, does not establish any permitting requirements independent of those under title V of the CAA and the regulations implementing title V, 40 CFR Parts 70 and 71. 109 All major stationary sources of air pollution and

109 Part 70 addresses requirements for state title V programs, and Part 71 governs the federal title V program.213

certain other sources are required to apply for title V operating permits that include emission limitations and other conditio ns as necessary to assure compliance with the applicable requirements of the CAA, including the requirements of the applicable State Implementation Plan. CAA sections 502(a) and 504(a), 42 U.S.C. 7661a(a) and 7661c(a). The ‘‘applicable requirements’’ that must be addressed in title V permits are defined in the title V regulations (40 CFR 70.2 and 71.2 (definition of ‘‘applicable requirement’’)). The EPA anticipates that, given the nature of the units subject to this transport rule and given that many of the units covered here are already subject to CSAPR , most of the sources at which the units are located are already subject to title V permitting requirements. For sources subject to title V, the interstate transport requirements for the 2008 ozone NAAQS that would be applicable to them under the final FIPs will be ‘‘applicable requirements’’ under title V and therefore will need to be addressed in the title V permits. For example, requirements concerning designated representatives, monitoring, reporting, and recordkeeping, the requirement to hold allowances covering emissions, the assurance provisions, and liability will be ‘‘applicable requirements’’ to be addressed in the permits. Title V of the CAA establishes the basic requirements for
state title V permit ting programs, including, among other214

things, provisions governing permit applications, permit content, and permit revisions that address applicable requirements under final FIPs in a manner that provides the flexibility necessary to implement market

- based programs such as the trading programs established by CSAPR and updated by this proposed ozone interstate transport rule . 42 U.S.C. 7661a(b). In CSAPR, EPA established standard requirements governing how sources covered by the rule would comply with title V and its regulations. 110 40 CFR 97.506(d). Under this proposed rule, EPA proposes that those same requirements would continue to apply to sources already in the CSAPR NO X Ozone

- season Trading Program and to any newly covered sources that have been added to address interstate transport of the 2008 ozone NAAQS. For example, the title V regulations provide that a permit issued under title V must include “[ a ] provision stating that no perm it revision shall be required under any approved . . . emissions trading and other similar programs or processes for changes that are provided for in the permit. ” 40 CFR 70.6(a)(8) and 71.6(a)(8). Consistent with these provisions in the title V regulations , in CSAPR , EPA included a provision stating that no permit revision is necessary for the allocation, holding,

110 EPA also issued a guidance document and template that includes instructions describing how to incorporate the CSAP R applicable requirements into a source’s title V permit. http://www.epa.gov/airtransport/CSAPR/pdfs/CSAPR_Title_V_Permit_Guidan ce.pdf215

deduction, or transfer of allowances. 40 CFR 97.506 (d)(1)
. This provision is also included in each title V permit for a covered

source. The EPA proposes to maintain its approach under CSAPR that allowances can be traded (or allocated, held, or deducted) without a revision to the title V permit of any of the sources involved. Similarly, the EPA is also proposing to maintain that sources in the CSAPR NOx Ozone

- season Trading Program can continue to use the title V minor modification procedure to change their approach for monitoring and reporting emissions, in certain circumstances. Specificall y, sources may use the minor modification procedure so long as the new monitoring and reporting approach is one of the prior

- approved approaches under
CSAPR (i.e., approaches using a continuous emission monitoring system, an excepted monitoring system unde r appendices D and E to Part 75, a low mass emissions excepted monitoring methodology under 40 CFR 75.19, or an alternative monitoring system under subpart E of Part 75 ), and the permit already includes a description of the new monitoring and reporting app roach to be used
. See 40 CFR 97.506(d)(2); 40 CFR 70.7(e)(2)(i)(B) and 40 CFR 71.7(e)(1)(i)(B). As described in our 2015 guidance, we suggest in our template that sources may comply with this requirement by including a table of all of the approved monitori ng and reporting approaches under the rule, and the216

applicable requirements governing each of those approaches. Inclusion of the table in a source’s title V permit therefore allows a covered unit that seeks to change or add to their chosen monitoring and r ecordkeeping approach to easily comply with the regulations governing the use of the title V minor modification procedure. Parts XXX and XXX [CITE GUIDANCE DOCUMENT] set forth in detail the approaches previously discussed that are available for covered units to use for monitoring and reporting emissions , and provide reference to the relevant provisions in Part 75. Under CSAPR, in order to change a monitoring or reporting approach, unit owners and operators must submit monitoring system certification appl ications to the EPA establishing the monitoring and reporting approach actually to be used by the unit, or, if the owners and operators choose to employ an alternative monitoring system, to submit petitions for that alternative to the EPA. These applicatio ns and petitions are subject to EPA review and approval to ensure consistency in monitoring and reporting among all trading program participants
. T he EPA’s responses to any petitions for alternative monitoring systems or for alternatives to specific monito ring or reporting217

requirements are to be posted on the EPA’s website 111
. EPA proposes to maintain the same approach in this proposed rule. Consistent with the EPA’s approach under CSAPR, the applicable requirements resulting from this proposed FIP would be i ncorporated into covered sources’ existing title V permits either pursuant to the provisions for reopening for cause (40 CFR 70.7(f) and 40 CFR 71.7(f)) or the standard permit renewal provisions (40 CFR 70.7(c) and 71.7(c)). 112 For sources newly subject to t itle V that will also be covered sources under the final FIPs, the initial title V permit issued pursuant to 40 CFR 70.7(a) should address the final FIP requirements. As in CSAPR, t he approach to title V permitting under the proposed FIP s imposes no independent permitting requirements and should reduce the burden on sources already required to be permitted under title V and on permitting authorities.

111 http://www.epa.gov/airmarkets/par ticipants/monitoring/petitions.html

112 A permit is reopened for cause if any new applicable requirements (such as those under a FIP) become applicable to a covered source with a remaining permit term of 3 or more years. If the remaining permit term is less than 3 years, such new applicable requirements will be added to the permit during permit renewal. See 40 CFR 70.7(f)(1)(I) and 71.7(f)(1)(I).218

E . Relationship to Other Emission Trading and Ozone Transport Programs 1. Interactions wi th Existing CSAPR 113 Annual Programs, Title IV Acid Rain Program, NO X SIP Call, Section 176A Petition , and O ther State Implementation Plans

a. CSAPR Annual Programs Nothing in this proposal affects any CSAPR NO X annual or
CSAPR SO 2 Group 1 or CSAPR SO 2 Group 2 requirements. The CSAPR annual requirements were premised on the 1997 and 2006 PM 2.5 NAAQS that are not being addressed in this rulemaking. The CSAPR NO X annual trading program and the CSAPR SO 2 Group 1 and Group 2 trading programs remain in place and will continue to be administered by the EPA. The EPA acknowledges that, in addition to the ozone budgets discussed above, the D.C. Circuit has remanded for reconsideration the CSAPR SO 2 budgets for Alabama, Georgia, South Carolina, and Texas. EME Homer City II , 795 F.3d at 138
. This proposal does not address the remand of these CSAPR phase 2 SO 2 emissions budgets. The EPA intends to address the remand of the phase 2 SO 2 annual emissions budgets separately. b. Title IV Interactions

113 The CSAPR Annual Programs are referred to in regulations as the Transport Rule NO X Annual Trading Program (40 CFR 97.401

- 97.435), the Transport Rule SO 2 Group 1 Trading Program (40 CFR 97.601

- 97.635) and the Transport Rule SO 2 Group 2 Trading Program (40 CFR 97.701

- 97.735).219

This proposed rule if adopted would not affect any Acid Rain Program requirements. Any Title IV sources that are subject to provisions of this proposed rule would still need to continue to comply with all Acid Rain provisions. Acid Rain Program SO 2 and NO X requirements are established independently in Title IV of the Clean Air Act, and will continue to apply independently of this proposed rule’s provisions. Acid Rain sources will still be required to comply with Title IV requirements, including the requirem ent to hold Title IV allowances to cover SO 2 emissions at the end of a compliance year.

c. NO X SIP Call Interactions States affected by both the NO X SIP Call and any final CSAPR ozone update for the 2008 NAAQS will be required to comply with the requirem ents of both rules. This proposed rule requires NO X

ozone season emission reductions from EGUs greater than 25 MW in nearly all NO X SIP Call states and at levels greater than required by the NO X SIP Call. Therefore, this proposed rule would satisfy the requirements of the NO X SIP Call for these large EGU units. The NO X SIP Call states used the NO X Budget Trading Program to comply with the NO X SIP Call requirements for EGUs serving a generator wi th a nameplate capacity greater than 25 MW and large

non - EGUs with a maximum rated heat input capacity greater than 250 MMBTU/hr. (In some states, EGUs smaller than 25 MW were also220

part of the NBP as a carryover from the Ozone Transport Commission NO X Budg et Trading Program.) When the EPA promulgated CAIR, it allowed states to modify that program and include all
NO X Budget Trading Program units in the CAIR NO X Ozone

- season Trading Program as a way to continue to meet the requirements of the NO X SIP Call for these sources. In CSAPR, however, the EPA allowed states to expand applicability of the trading program to EGUs smaller than 25 MW but did not allow the expansion of applicability to include large non

- EGU sources. The reason for excluding large non

- EGU

sources was largely that emissions from these sources were generally much lower than the budget amount and there was concern that surplus allowances cr e ated as a result of an overestimat ion of baseline emissions and subsequent s hutdowns (since 1999 when the NO X SIP Call was promulgated) would prevent needed reductions by the EGUs to address significant contribution to downwind air quality impact s. Since then, s tates have had to find appropriate ways to continue to show complianc e with the NO X SIP Call, particularly221

for large non - EGUs. 114 Most states that included such sources in CAIR are still working to find suitable solutions. 115 Therefore, the EPA is taking comment on whether to allow
any NO X SIP Call state affected by this proposed rule to voluntarily submit a SIP revision at a budget level that is environmentally neutral to address the state’s NO X SIP Call requirement for ozone season NO X reductions. The SIP revision could include a rule to expand the applicability of the CSAPR NO X

ozone - season trading program to include all NO X Budget Trading Program units. Analysis shows that these units (mainly large

non - EGU boilers, combustion turbines, and combined cycle units with a maximum rated heat i nput capacity greater than 250

mm B tu /hr) continue to emit well below their portion of the NO X SIP Call budget. In order to ensure that the necessary amount of
EGU emission reductions occur for this proposed rule, the corresponding state ozone - season emissi ons budget amount could be increased by the lesser of the highest ozone season NO X emissions (in the last 3

- 5 years) 116 from those units or the relevant non

- EGU budget under the NO X SIP Call , and this small

114 CSAPR generally satisfies NO X SIP Call requirements for EGUs in most affected states because the CSAPR cap is lower than the EGU portion of the NO X SIP Call emission levels. 115 Affected sources continue to report ozone season emissions using part 75 as required by the NO X SIP Call and emissions in most states cannot (or are not likely to) exceed NO X SIP Call non

- EGU budget levels. 116 EPA requests comment on the appropriate time period for this determination.222

group of non

- EGUs could participate in the CSAPR ozone - season trading program
. The environmental impact would be neutral using this approach , and hourly reporting of emissions under part 75 would continue. This approach would address requests by states for help in determining an appropriate way to address the continuing NO X SIP Call requirement as to non

- EGU sources . EPA proposes that if this option is finalized that the variability limits established for EGUs be unchanged as a result of including these non

- EGUs. The assurance provisions would apply
to EGUs , and emissions from non - EGUs would not affect the assurance levels. The NO X SIP Call generally requires that states choosing to rely on large EGUs and large non

- EGUs for meeting NO X SIP Call emission reduction requirements must establish a NO X mas s emissions cap on each source and require Part 75, subpart H monitoring. As an alternative to source

- by

- source NO X mass emission caps, a state may impose NO X emission rate limits on each source and use maximum operating capacity for estimating NO X

mass em issions or may rely on other requirements that the state demonstrates to be equivalent to either the NO X mass emission caps or the NO X emission rate limits that assume maximum operating capacity. Collectively, the caps or their alternatives cannot exceed the portion of the state budget for those sources.
See 40 CFR 51.121(f)(2) and (i)(4). If the EPA were to allow a223

state to expand the a pplicability of this proposed rule to include all the NO X Budget Trading Program units in the CSAPR NO X

ozone - season trading program, the cap requirement would be met through the new budget and the monitoring requirement would be met through the trading pr ogram provisions , which require part 75 monitoring. Whether this option is finalized or not , the EPA will work with states to ensure that NO X SIP Call obligations continue to be met. The EPA requests comment on the voluntary inclusion of NO X SIP Call non

- EGUs in this 2008 ozone - season proposed rule. d
. CAA Section 176A Petition to Expand the OTR On December 9, 2013, the EPA received a CAA section 176A petition from the states of Connecticut, Delaware, Maryland, Massachusetts, New Hampshire , N ew York, Rhode Island , and Vermont. The petition was amended on December 12, 2013 to add the state of Pennsylvania as a petitioning state. The petition requests that the EPA add 8 states and the remainder of the Commonwealth of Virginia to the current Ozon e Transport Region that was established under CAA section 184. 117 The EPA will address this petition at a future date.

117 The named 8 states are: Illinois, Indiana, Kentucky, Michigan, North Carolina, Ohio, Tennessee, and West Virginia. Currently, the portion of the Commonwealth of Virginia in the OTR is in the consolidated metropolitan statistical area that includes the Dis trict of Columbia and northern Virginia.224

e . Other State Implementation Plans In this proposal, the EPA has not conducted any technical analysis to determine whether compliance with the proposed rule would satisfy other requirements for EG Us in any attainment or nonattainment areas (e.g., RACT or BART)
. For that reason, the EPA is not now making determinations nor establishing any presumptions that compliance with the proposed rule satisfies
any other requirements for EGUs. Based on analyses that states conduct on a case

- by

- case basis, states may be able to conclude that compliance with the proposed rule for certain EGUs fulfills other SIP requirements. 2. Other Federal Rulemakings a. Clean Power Plan On August 3, 2015, President Obama and EPA announced the Clean Power Plan

– a historic and important action on emissions that contribute to cl imate change . The CPP reduc es carbon pollution from the power sector . With strong but achievable standards for power plants, and customized goals for states to cut the carbon pollution (CO 2 ) that is driving climate change, the Clean Power Plan (CPP) provid es national consistency, accountability and a level playing field while reflecting each state’s energy mix. The Clean Air Act

– under section 111(d)

– creates a partnership between EPA, states, tribes and U.S. territories

–225

with EPA setting a goal and sta tes and tribes choosing how they will meet it. The CPP follows that approach. The CPP establish es interim and final CO 2 emission performance rates and statewide goals. States then develop and implement plans that ensure that the power plants in their state

– either individually, together or in combination with other measures

– achieve these rates or goals. States will be required to submit a state plan, or an initial submittal with an extension request, by September 6, 2016. C omplete state plans must be submitted no later than September 6, 2018. The interim rates and goals are assessed over the years 2022 to 2029 and the final CO 2 emission performance rates, rate

- based goals, or mass

- based goals are assessed for 2030 and after. Because the final deadline for states to submit complete plans under the CPP is September 2018 and because mandatory CPP reductions do not begin until the interim period (i.e., starting in 2022), the EPA does not anticipate significant interactions with t he CPP and the near

- term (i.e., starting in 2017) ozone
season EGU NO X emission reduction requirements under this proposal. However the EPA notes that actions taken to reduce CO 2 emissions (e.g., deployment of zero

- emitting generation) may also reduce ozon e season NO X emissions. To the extent that states or electric utilities consider emission reduction strategies to226

meet these two separate requirements

– CPP and interstate ozone transport

– in a coordinated manner , they may find efficiency gains in that ac tions to meet the CPP goals may also help meet interstate ozone transport requirements. The EPA believes that timing flexibility provided in the CPP offers significant benefits that allow states to develop plans that will help achieve a number of goals, in cluding, but not limited to: reducing cost, addressing reliability concerns, addressing concerns about stranded assets, and facilitating the integration of meeting the emission guidelines and compliance by affected EGUs with other air quality and pollution control obligations on the part of both states and affected EGUs. The EPA is also cognizant of the potential influence of addressing interstate ozone transport on the CPP. As states and utilities undertake the near

- and longer

- term planning that will be n eeded for the CPP, they will have the opportunity to consider how compliance with this rule can anticipate, or be consistent with, expected compliance strategies for the CPP. While some EGU NO X mitigation strategies, most notably shifting generation from h igher

- NO X emitting coal

- fired units to lower NO X emitting NGCC units, can potentially also reduce CO 2 emissions, the EGU emissions analysis performed for this interstate transport action does not results in a notable difference in CO 2 emissions. However, EPA’s results do not preclude states and227

utilities from considering these programs together. And, as the EPA has structured the interstate transport obligations that would be established by this proposal as requirements to limit aggregate affected EGU emissions and the EPA is not proposing to enforce source

- specific emission reduction requirements , EGU

owners have the flexibility to plan for compliance with the interstate ozone transport requirements in ways that are consistent with state and EGU s trategies to reduce CO 2 emissions for the Clean Power Plan. With respect to concerns about potentially stranded investments 118 in NO X control equipment, the EPA’s budget

- setting approach quantifies NO X reductions from upgrading combustion controls at coal

- f ired units. However, CSAPR’s flexible compliance does not require that specific NO X controls be installed at any specific facilities , and we would n o t expect such controls to be installed on units that may not be economic to operate in the future
. b. 2015 Ozone Standard
On October 1, 2015 , the EPA strengthen ed the ground

- level ozone NAAQS to 70 ppb , based on extensive scientific evidence about ozone’s effects on public health and welfare. This proposed rule to update CSAPR to address interstate emissions

118 A potential stranded investment is an investment in an EGU NOX reduction strategy (e.g., combustion controls) for which the affected EGU retires before the investment is fully depreciated.228

tr ansport with respect to the 2008 ozone NAAQS is a separate and distinct regulatory action and is not meant to address the CAA’s good neighbor provision with respect to the strengthened 2015

ozone NAAQS . The EPA is mindful of the need to address ozone transport for the 2015 ozone NAAQS. T h e statutory deadline for the EPA to finalize area designations is October 1, 2017. Further, good neighbor SIPs from states are due on October 1, 2018. The steps taken un der this proposal to reduce interstate ozone transport, when finalized, will help states attain and maintain the 2015 ozone NAAQS. Moreover, t o facilitate the implementation of the CAA good neighbor provision the EPA intends to provide information regarding steps 1 and 2 of the CSAPR framework in the fall of 2016. In particular, t he EPA expects to conduct modeling necessary to identify projected nonattainment and maintenance receptors and identify the upwind states that contribute significantly to t hese receptors.

VIII. Costs , Benefits , and Other Impacts of the Proposed Rule The EPA evaluated the costs, benefits, and impacts of compliance with the proposed EGU NO X ozone - season emissions budgets that reflect uniform NO X costs of $1,300 per ton (see
propos ed emissions budgets in table VI.1). In addition, the EPA also assessed compliance with other more and less stringent229

alternative EGU NO X ozone - season emissions budgets, reflecting uniform NO X costs of $3,400 per ton and $500 per ton, respectively (see alt ernative emissions budgets in tables VI.2 and VI.3). The EPA evaluated the impact of implementing these emissions budgets to reduce interstate transport for the 2008 ozone NAAQS in 2017. More details for this assessment can be found in the Regulatory Impac t Analysis in the docket for this proposed rule. The EPA notes that its analysis of the regulatory control scenarios (i.e., the proposal and more and less stringent alternatives) is illustrative in nature, in part because the EPA proposes to implement the proposed EGU NO X emissions budgets via a regional NO X ozone - season allowance trading program. This implementation approach provides utilities with the flexibility to determine their own compliance path. The EPA’s assessment develops and analyzes one possible scenario for implementing the
NO X budgets proposed by this action and one possible scenario for implementing the more and less stringent alternatives. Table VIII.1 provides the projected 2017 EGU emissions reductions for the evaluated regulatory control scenarios.230

Table VIII.1 - Projected 2017 Emissions Reductions of NOx, SO 2 , and CO 2 with the Proposed NOx Emissions Budgets and More or Less Stringent Alternatives (Tons) 1
Proposal More Stringent

Alternative Less Stringent

Alternative NO X (annual) 89,969 92,582 23,686 NO X (ozone season) 84,856 83,680 25,051 SO 2 (annual) 383 425 301 CO 2 (annual) 610,092 614,385 719,760 1 NOx and SO 2 emissions are reported in English (short) tons; CO 2 is reported in metric tons.

The EPA estimates the costs associated with compliance with the illustrative proposed regulatory control alternative to be approximately $93 million annually. These costs represent the private compliance cost of reducing NO X emissions to comply with the proposal and include monitoring, recordkeeping, and reporting costs . Table VIII.2 provid es the estimated costs for the evaluated regulatory control scenarios, including the proposal and more and less stringent alternatives. Estimates are in 2011 dollars. Table VIII.2 – Cost Estimates for Compliance with the Proposed NO X Emissions Budgets and More and Less Stringent Alternatives (2011$) 1
Proposal More Stringent Alternative Less Stringent

Alternative Costs $93 $96 $4.7 1 Levelized annualized costs over the period 2016 through 2040, discounted using the 4.77 discount rate used in IPM’s objective function of minimizing the net present value of the stream of total costs of electricity generation. In this analysis, the EPA monetized th e estimated benefits associated with reduc ing population exposure to ozone and PM 2.5231

and co

- benefits of decreased emissions of CO 2 , but was unable to monetize the co

- benefits associated with reducing exposure to mercury, carbon monoxide, and NO 2 , as well a s ecosystem effects and visibility impairment. In addition, the EPA expects positive health and welfare impacts associated with reduced levels of hydrogen chloride , but could not quantify these impacts
. Among the benefits it could quantify , the EPA estimat ed combinations of health benefits at discount rates of 3 percent and 7 percent (as recommended by the EPA’s Guidelines for Preparing Economic Analyses [U.S. EPA, 2014] and OMB’s Circular A

- 4 [OMB, 2003]) and climate co

- benefits at discount rates of 5 perc ent, 3 percent, 2.5 percent, and 3 percent (95 th percentile) (as recommended by the interagency working group). The EPA estimates the monetized ozone

- related benefits 119 of the proposal to be $490 million to $790 million (2011$) in 2017 and the PM2.5

- related co - benefits 120 of the proposal to be $190 million to $430 million (2011$) using a 3% discount rate and $170 million to $380 million (2011$) using a 7% discount rate. Further, the EPA estimates CO 2 - related co

- benefits of $6.5 to $66 million (2011$). Addition al details on this analysis are provided in the RIA for

119 The ozone - related heal th benefits range is based on applying different adult mortality functions ( i. e., Smith et al. (200 9 ) and Zanobetti and Schwartz (2008))
. 120 The PM2.5

- related health co - benefits range is based on applying different adult mortality functions ( i.e., Krewski e t al. (2009) and Lepeule et al. (2012)).232

this proposal. Tables VIII. 3 and VIII. 5 summarize the quantified monetized human health and climate benefits of the proposal and the more and less stringent control alternatives. Table VIII.4 summarizes the estimated avoided ozone

- and PM2.5

- related health incidences for the proposal and the more and less stringent control alternatives. Table VIII.3 Estimated Health Benefits of Projected 2017 Emissions Reductions for the Proposal and More or Less Stringent Alternatives (millions of 2011$) 1
Proposal More Stringent

Alternative Less Stringent

Alternative NO X (as ozone) $490 to $790 $500 to $820 $140 to $ 2 2 0 NO X (as PM2.5) 3% Discount Rate 7% Discount Rate $190 to $430 $170 to $380 $190 to $440

$170 to $390 $49 to $110

$45 to $100 Total 3% Discount Rate 7% Discount Rate $670 to $1,200 $ 6 5 0 to $1,200 $690 to $1,300

$670 to $1,200 $190 to $ 3 4 0 $ 1 8 0 to $ 3 3 0 1 The health benefits range is based on adult mortality functions (e.g., from Krewski et al. (2009) with Smith et al. (2009) to Lepeule et al. (2012) with Zanobetti and Schwartz (2008)).
Table VIII.4 Summary of Estimated Avoided Ozone - Related and PM 2.5 - Rel ated Health Incidences from Projected 2017 Emissions Reductions for the Proposal and More or Less Stringent Alternatives 1233

Ozone - related Health Effects Proposal More Stringent Alternative Less

Stringent Alternative Avoided Premature Mortality Smith et al. (2009) (all ages) 48 50 14 Zanobetti and Schwartz (2008) (all ages) 81 83 2 3 Avoided Morbidity Hospital admissions

— respiratory causes (ages > 65) 79 81 2 2 Emergency room visits for asthma (all ages) 320 330 9 0 Asthma exacerbation (ages 6

- 18) 93,000 95,000 2 6 ,000 Minor restricted

- activity days (ages 18

- 65) 240,000 240,000 67 ,000 School loss days (ages 5

- 17) 77,000 79,000 2 2 ,000 PM 2.5 - related Health Effects Avoided Premature Mortality Krewski et al. (2009) (adult) 21 22 5.6 Lepeule et al. (2012) (adult) 48 50 13 Woodruff et al. (1997) (infant) <1 <1 <1 Avoided Morbidity Emergency department visits for asthma (all ages) 12 12 3.1 Acute bronchitis (age 8

– 12) 31 32 8.1 Lower respiratory symptoms (age 7

– 14) 390 400 100 Upper respiratory symptoms (asthmatics age 9

– 11) 560 570 150 Minor restricted

- activity days (age 18

– 65) 16,000 16,000 4,200 Lost work days (age 18

– 65) 2,700 2,700 700 Asthma exacerbation (age 6

– 18) 580 600 150 Hospital admissions

— respiratory (all ages) 6.4 6.5 1.7 Hospital admissions

— cardiovascular (age > 18) 7.8 8.0 2.1
Non

- Fatal Heart Attacks (age >18) Peters et al. (2001) 25 26 6.6 Pooled estimate of 4 studies 2.7 2.8 0.7 1 All estimates are rounded to whole numbers with two significant figures.234

Table VIII . 5 Estimated Global Climate Co - benefits of CO 2 Reductions for the Proposal and More or Less Stringent Alternatives (millions of 2011$) 1
Discount rate and statistic Proposal More Stringent Alternative Less

Stringent Alternative 5% (average) $6.5 $6.5 $7.6 3% (average) $23 $23 $27 2.5% (average) $35 $35 $41 3% (95 th percentile) $66 $66 $78 1 The social cost of carbon (SC

- CO 2 ) values are dollar

- year and emissions

- year specific. SC

- CO 2 values represent only a partial accounting of climate impacts.
The EPA combined this information to perform a benefit

- cost analysis for this proposal (shown in table VIII.6 and for the more and less stringen t alternatives

— shown in the RIA in the docket for this proposed rule). Table VIII . 6 Total Costs, Total Monetized Benefits, and Net Benefits of the Proposal in 2017 for U.S. (millions of 2011$) Climate Co

- Benefits $23 Air Quality Health Benefits $ 67 0 to $1200 Total Benefits $ 7 0 0 to $1200 Annualized Compliance Costs $93 10 Net Benefits $ 6 0 0 to $1100 Non

- Monetized Benefits Non

- monetized climate benefits Reductions in exposure to ambient NO 2 and SO 2 Reductions in mercury deposition Ecosystem benefits assoc. with reductions in emissions of NOx, SO 2 , and PM Visibility impairment
There are additional important benefits that the EPA could not monetize. Due to current data and modeling limitations, our estimates of the co

- benefits from reducing CO 2 emissions do not include important impacts like ocean acidification or potential tipping points in natural or managed ecosystems. Unquantified235

benefits also include climate co

- benefits from reducing emissions of non

- CO 2 GHGs (e.g., nitrous oxide and m ethane) and

co - benefits from reducing direct exposure to SO 2 , NO X , and hazardous air pollution (e.g., mercury), as well as from reducing ecosystem effects and visibility impairment. Based upon the foregoing discussion, it remains clear that the benefits of this proposed action are substantial, and far exceed the costs. Additional details on benefits, costs, and net benefits estimates are provided in the RIA for this proposal.
For this proposed rule, the EPA analyzed the costs to the electric power sector us ing IPM. The IPM is a dynamic linear programming model that can be used to examine the economic impacts of air pollution control policies for SO 2 and NO X throughout the contiguous United States for the entire power system. Documentation for IPM can be foun d in the docket for this rulemaking or at www.epa.gov/powersectormodeling
. The EPA provides a qualitative assessment of economic impacts associated with electricity price changes to consumers that may result from this proposed rule. This assessment can be found in the RIA for this proposed rule. Executive Order 13563 directs federal agencies to consider the effect of regulations on job creation and employment. According to the Executive Order, “our regulatory system must236

protect public health, welfare, safety, and our environment while promoting e conomic growth, innovation, competitiveness, and job creation. It must be based on the best available science” (Executive Order 13563, 2011). Although standard benefit

- cost analyses have not typically included a separate analysis of regulation

- induced empl oyment impacts, employment impacts are of particular concern and questions may arise about their existence and magnitude. States have the responsibility and flexibility to implement policies and practices as part of developing SIPs for compliance with the emissions budgets found in this proposed rule. Given the wide range of approaches that may be used and industries that could be affected, quantifying the associated employment impacts is difficult.

IX. Summary of Proposed Changes to the Regulatory Text for the CSAPR FIPs and CSAPR Trading Program s This section describes proposed amendments to the regulatory text in the Code of Federal Regulations (CFR) for the CSAPR FIPs and the CSAPR NO X Ozone

- Season Trading Program related to the findings and remedy discu ssed throughout this preamble. This section also describes other minor proposed corrections to the existing CFR text for the CSAPR FIPs and the CSAPR trading programs more generally.237

The proposed regulatory text amendments related to the CSAPR FIPs and the CSAPR NO X Ozone

- Season Trading Program would be made in parts 52, 78, and 97 of title 40 of the CFR. Proposed changes to update the list of states that would be subject to FIPs to address obligations related to transported ozone pollution are in section 5 2.38(b)(2) (summarizing all states subject to FIPs), 52.540 (ending FIP for Florida), 52.882 (establishing FIP for Kansas), and 52.2140 (ending FIP for South Carolina). Section 97.510 contains the proposed changes establishing or revising the amounts of NO X Ozone

- Season trading budgets, new unit set

- asides (NUSAs), Indian country NUSAs, and variability limits for states whose sources participate in the
CSAPR NO X Ozone

- Season Trading Program. Additional proposed changes to accommodate trading program partici pation by sources whose coverage starts in different years are in sections 97.506(c)(3) (compliance deadlines), 97.512 (NUSA allowance allocation procedures), 97.530(b) (monitor certification deadlines), and 97.534(d) (reporting deadlines). Proposed chan ges to section 52.38(b)(3) through (5) would update states’ options to submit SIP revisions which, upon approval by the EPA, would modify certain CSAPR trading program provisions as applied to those states or replace the states’ FIPs with SIPs

– options th at correspond closely to states’ SIP revision options under CSAPR as initially promulgated. Proposed238

changes in section 97.521 (allowance recordation) delay the deadlines for recording CSAPR NO X Ozone

- Season allowances for the control periods in 2018 thro ugh 2022 in order to coordinate with the proposed updated submission deadlines for the optional SIP revisions. A similar proposed delay in the deadline for recording allowances for the control period in 2017 would provide time to finalize this rule and wo uld thereby allow the EPA to record allocations of 2017 allowances based on the final revised budgets instead of recording allocations based on existing budgets that are proposed to be superseded. The proposed limitations on the use of emission allowances issued for a compliance period before 2017 or from the state NO X Ozone

- Season trading budget for Georgia are implemented by redefining sources’ obligations under the trading program in terms of “tonnage equivalents” of allowances rather than in terms of no minal quantities of allowances. Section 97.502 contains a proposed new definition of “tonnage equivalent” and related proposed modifications to the definitions of “CSAPR NO X Ozone

- Season allowance” and “CSAPR NO X Ozone

- Season emissions limitation.” A new s ection 97.524(f) sets out the proposed procedures for determining the tonnage equivalent of an allowance. Additional proposed changes to reflect the use of allowances based on their tonnage equivalents ( rather than their nominal numbers ) to meet various obligations are contained in239

sections 97.506(c) (standard requirements relating to NO X emissions), 97.511(c) (corrections of incorrect allowance allocations), 97.524 (compliance with emissions limitations and excess emissions provisions), and 97.525 (compliance with assurance provisions). A proposed change to section 78.1 would make EPA’s determinations of the tonnage equivalents of particular allowance holdings subject to the administrative appeal procedures set forth in part 78. In addit ion to the proposed CFR changes described above, this proposal also includes other minor amendments throughout the sections of parts 52, 78, and 97 implementing CSAPR, including sections implementing CSAPR’s other three emissions trading programs. The most common category of these minor changes consists of proposed corrections to cross

- references.
Some cross

- references would change as a result of this proposal and corrections of those cross

- references are therefore related to the changes described above, wh ile other cross

- references as originally published indicated incorrect locations because of typographical errors or indicated correct locations but did not use the correct CFR format. In virtually all cases, the intended
correct cross

- reference can be dete rmined from context, but the corrections clarify the regulations. Besides the proposed corrections to cross

- references, most of the remaining proposed corrections address other240

typographical errors. However, a small number of the proposed CFR changes corr ect errors that are not cross

- references or obviously typographical errors. While the EPA views all of these proposed corrections as noncontroversial, a few merit a short explanation. First, the phrase “with regard to the State” or “the State and” would b e added in a number of locations in sections 52.38 and 52.39 where it was inadvertently omitted. The added phrase clarifies that when the EPA approves a state’s SIP revision as modifying or replacing provisions in a CSAPR trading program, the modification or replacement is effective only with regard to that particular state. Correcting the omissions of these phrases would make the language concerning SIP revisions consistent for all the types of SIP revisions under all the CSAPR trading
programs. Second, th e phrase “in part” would be removed from the existing FIP language in various sections of part 52 for certain states with Indian country to clarify that in order to replace a CSAPR FIP affecting the sources in these states, a SIP revision must fully, not “ in part,” correct the SIP deficiency identified by the EPA as the basis for the FIP. The intended purpose of the words “in part”

– specifically, to indicate that approval of a state’s SIP revision would not relieve any sources in Indian country within the borders of the state from obligations under241

the FIP

– is already served by other language in those FIPs. The proposed corrections would make the language in these CSAPR FIPs consistent with the FIP language for the remaining CSAPR FIPs that address states with Indian country. Analogous proposed changes to the general CSAPR FIP language in sections 52.38(a)(5) and (6) and (b)(5) and (6) and 52.39(f), (i), and (j) would remove the phrase “in whole or in part” (referencing states without Indian country and st ates with Indian country, respectively) while adding language distinguishing the effect that the EPA’s approval of a SIP revision would have on sources in the state from the lack of effect on any sources in Indian country within the borders of the state. Third, language would be added to section 78.1 clarifying that determinations by the EPA Administrator under the CSAPR trading programs that are subject to the part 78 administrative appeal procedures are subject to those procedures whether the source in question participates in a CSAPR trading program under a FIP or under an approved SIP revision. This approach is consistent with the approach taken under CAIR FIPs and SIPs and with the EPA’s intent in CSAPR, as evidenced by the lack of any proposal or dis cussion in the CSAPR rulemaking regarding deviation from the historical approach. This approach is also consistent with provisions in sections 52.38 and 52.39 prohibiting approvable SIP revisions from altering certain242

provisions of the CSAPR trading progra ms, including the provisions specifying that administrative appeal procedures for determinations of the EPA Administrator under the trading programs are set forth in part 78. Fourth, the phrase “steam turbine generator” would be changed to “generator” in the list of required equipment in the definition of a “cogeneration system” in sections 97.402, 97.502, 97.602, and 97.702. Absent this correction, a combustion turbine in a facility that uses the combustion turbine in combination with an electricity gener ator and heat recovery steam generator, but no steam turbine, to produce electricity and useful thermal energy would not meet the definition of a “cogeneration unit.” The proposed correction would clarify that a combustion turbine in such a facility should be able to qualify as a “cogeneration unit” (assuming it meets other relevant criteria) under the CSAPR trading programs , as it could under the CAIR trading programs . The consistency of this approach with the EPA’s intent in the CSAPR rulemaking is eviden ced by the lack of any proposal or discussion in that rulemaking regarding the concept of narrowing the set of facilities qualifying for an applicability exemption as cogeneration units. To the contrary, as discussed in the preamble to the CSAPR proposal ( 75 FR 45307), the definition of “cogeneration system” was created in CSAPR to potentially243

broaden the set of facilities qualifying for the exemption, specifically by facilitating qualification as “cogeneration units” for certain units that might not meet t he required levels of efficiency on an individual basis but that operate as components of multi

- unit “cogeneration systems” that do meet the required levels of efficiency. Fifth, the deadline for recording certain allowance allocations under sections 97.42 1(j), 97.521(j), 97.621(j), and 97.721(j) would be changed from the “date on which” the EPA receives the necessary allocation information to the date “15 days after the date on which” the EPA receives the information. The EPA’s lack of intention in the CSA PR rulemaking to establish the deadline as defined prior to the correction is evidenced by the impracticability of complying with such a deadline. Sixth, a proposed change to a description of a required notice under the assurance provisions in sections 97 .425(b)(2)(iii)(B), 97.525(b)(2)(iii)(B), 97.625(b)(2)(iii)(B), and 97.725(b)(2)(iii)(B) would modify the phrase “any adjustments” to the phrase “calculations incorporating any adjustments” in order to clarify that the required notice will identify not onl y any adjustments made to previously noticed calculations, but also the complete calculations with (or without) such adjustments. The intended meaning is clear from the subsequent provisions that use this244

notice as the point of reference for the complete c alculations used in the succeeding administrative procedures. Finally, the EPA notes that the proposed amendments include updating the name of the rule in the CFR from its name as initially proposed

– “Transport Rule” or “TR”

– to its name as finalized

– “ Cross

- State Air Pollution Rule” or “CSAPR.” This update is intended to reduce confusion and simplify communications regarding the rule by allowing a single name to be used in all contexts. The EPA invites comment on the proposed regulatory text amendments described above and shown at the end of this notice.

X. Statutory and Executive Order Reviews Additional information about these statutes and Executive Orders can be found at htt p://www2.epa.gov/laws

regulations/laws

- and

- executive

- orders
. A. Executive Order 12866: Regulatory Planning and Review and Executive Order 13563: Improving Regulation and Regulatory Review This action is an economically significant regulatory action that was submitted to the Office of Management and Budget (OMB) for review. Any changes made in response to OMB recommendations have been documented in the docket. The EPA
p repared an analysis of the potential costs and benefits24 5

associated with this action. This analysis , which is contained in the “Regulatory Impact Analysis for the Proposed Cross

- State Air Pollutio n Rule Update for the 2008 Ozone NAAQS” [ EPA

- 452/R

15

- 009 ] , i s available in the docket and is briefly summarized in section VIII of this preamble. Consistent with E xecutive O rder (EO) 12866 and EO 13563, the EPA estimated the costs and benefits for three regulatory control alternatives: the proposed EGU NO X ozone - season emissions budgets and more and less stringent alternatives. This proposed action would reduce ozone season NO X emissions from EGUs in 23 eastern states. Actions taken to comply with the proposed EGU NO X

ozone - season emissions budgets would al so reduce emissions of other criteria air pollution and hazardous air pollution emissions, including annual NO X , and CO 2 . The benefits associated with these co

- pollutant reductions are referred to as co

benefits, as these reductions are not the primary obj ective of this rule. The RIA for this proposal analyzed illustrative compliance approaches for implementing the proposed FIPs. This proposal would establish EGU NO X ozone - season emissions budgets for 23 states and implement these budgets via the existing C SAPR NO X

ozone - sea son allowance trading program. The EPA evaluated the costs, benefits, and impacts of implementing the proposed EGU NO X ozone - season emissions budgets246

that reflect uniform NO X costs of $1,300 per ton (see proposed emissions budgets in tab le VI.1). In addition, the EPA also assessed implementation of other more and less stringent alternative EGU NO X ozone - season emissions budgets, reflecting uniform NO X costs of $3,400 per ton and $500 per ton, respectively (see alternative emissions budget s in tables VI.2 and VI.3). The EPA evaluated the impact of implementing these emissions budgets to reduce interstate transport for the 2008 ozone NAAQS in 2017. More details for this assessment can be found in the Regulatory Impact Analysis in the docket for this proposed rule.
The EPA notes that its analysis of the regulatory control scenarios (i.e., the proposal and more and less stringent alternatives) is illustrative in nature, in part because the EPA proposes to implement the proposed EGU NO X emissions budgets via a regional NO X ozone - season allowance trading program. This implementation approach provides utilities with the flexibility to determine their own compliance path. The EPA’s assessment develops and analyzes one possible scenario for implementing the
NO X budgets proposed by this action and one possible scenario for implementing the more and less stringent alternatives. The EPA estimates the costs associated with compliance with the illustrative proposed regulatory control alternative t o be247

approximately $93 million (2011$) annually. These costs represent the private compliance cost of reducing NO X emissions to comply with the proposal. In this analysis, the EPA monetized the estimated benefits associated with the reduced exposure to oz one and PM2.5 and co

benefits of decreased emissions of CO 2 , but was unable to monetize the co

- benefits associated with reducing exposure to mercury, carbon monoxide, and NO 2 , as well as ecosystem effects and visibility impairment. In addition, there are e xpected to be unquantified health and welfare impacts associated with changes in hydrogen chloride. Specifically, the EPA estimated combinations of health benefits at discount rates of 3 percent and 7 percent (as recommended by the EPA’s Guidelines for
Pre paring Economic Analyses [U.S. EPA, 2014] and OMB’s Circular
A

- 4 [OMB, 2003]) and climate co

- benefits at discount rates of 5 percent, 3 percent, 2.5 percent, and 3 percent (95 th percentile) (as recommended by the interagency working group). The EPA estimat es the monetized ozone - related benefits 121 of the proposal to be $490 million to $790 million (2011$) in 2017 and the PM2.5

- related co

- benefits 122 of the proposal to be $190 million

121 The ozone - related health benefits range is based on applying different adult mortality functions ( i. e., Smith et al. (200 9 ) and Zanobetti and Schwartz (2008))
. 122 The PM2.5

- related health co - benefits range is based on applying different adult mortality functions ( i.e., Krewski et al. (2009) and Lepeule et al. (2012)).248

to $430 million (2011$) using a 3% discount rate and $170 million to $380 mill ion (2011$) using a 7% discount rate. Further, the EPA estimates CO 2 - related co

- benefits of $6.5 to $66 million (2011$). Additional details on this analysis are provided in the RIA for this proposal. Tables X. A

- 1, X. A

- 2, and
X. A

- 3 summarize the quantified human health and climate benefits and the costs of the proposal and the more and less stringent control alternatives. Table X . A - 1 Estimated Health Benefits of Projected 2017 Emissions Reductions for the Proposal and More or Less Stringent Alternatives (millions of 2011$) 1 Proposal More Stringent Less Stringent NO X (as ozone) $490 to $790 $500 to $820 $140 to $ 2 2 0 NO X (as PM2.5) 3% Discount Rate 7% Discount Rate $190 to $430 $170 to $380 $190 to $440

$170 to $390 $49 to $110

$45 to $100 Total 3% Discount Rate 7% Discount Rate $670 to $1,200 $ 6 5 0 to $1,200 $690 to $1,300

$670 to $1,200 $190 to $ 3 4 0 $ 1 8 0 to $ 3 3 0 1 The health benefits range is based on adult mortality functions (e.g., from Krewski et al. (2009) with Smith et al. (2009) to Lepeule et al. (2012) with Zanobetti and Schwartz (2008)).

Table X . A - 2 Estimated Global Climate Co - benefits of CO 2 Reductions for the Proposal and More or Less S tringent Alternatives (millions of 2 011$) 1 Discount rate and statistic Proposal More Stringent Less

Stringent 5% (average) $6.5 $6.5 $7.6 3% (average) $23 $23 $27 2.5% (average) $35 $35 $41 3% (95 th percentile) $66 $66 $78 1 The social cost of carbon ( SC

- CO 2 ) values are dollar

- year and emissions

- year specific. SC

- CO 2 values represent only a partial accounting of climate impacts.249

The EPA combined this information to perform a benefit

- cost analysis for this proposal (shown in table VIII.6 and for the more and less stringent alternatives

— shown in the RIA in the docket for this proposed rule). Table X. A - 3 Total Costs, Total Monetized Benefits, and Net Benefits of the Proposal in 2017 for U.S. (millions of 2011$) Climate Co

- Benefits $23 Air Quality Health Benefits $ 67 0 to $1200 Total Benefits $ 7 0 0 to $1200 Annualized Costs Compliance Costs $93 10 Net Benefits $ 6 0 0 to $1100 Non

- Monetized Benefits Non

- monetized climate benefits Reductions in exposure to ambient NO 2 and SO 2 Reductions in mercury deposition Ecosystem benefits assoc. with reductions in emissions of NOx, SO 2 , and PM Visibility impairment
There are additional important benefits that the EPA could not monetize. Due to current data and modeling limitations, our estimates of the co

- benefits from reducing CO 2 emissions do not include important impacts like ocean acidification or potential tipping points in natural or managed ecosystems. Unquantified benefits also include climate co

- benefits from reducing emissions of non

- CO 2 GHGs (e.g., nitrous oxide and metha ne) and

co - benefits from reducing direct exposure to SO 2 , NO X , and hazardous air pollution (e.g., mercury), as well as from reducing ecosystem effects and visibility impairment. Based upon the foregoing discussion, it remains clear that the benefits of thi s proposed action are substantial, and far exceed the costs.250

Additional details on benefits, costs, and net benefits estimates are provided in the RIA for this proposal.

B. Paperwork Reduction Act (PRA) The information collection acti vities in this proposed rule have been submitted for approval to the Office of Management and Budget (OMB) under the Paperwork Reduction Act (PRA), 44 U.S.C. 3501 et seq. The Information Collection Request (ICR) document that the EPA prepared has been assigned EPA ICR number 2527.01
. You can find a copy of the ICR in the docket for this rule, and it is briefly summarized here. The information generated by information colle ction activities under CSAPR is used by the EPA to ensure that affected facilities comply with the emission limits and other requirements. Records and reports are necessary to enable EPA or states to identify affected facilities that may not be in complian ce with the requirements. The recordkeeping requirements require only the specific information needed to determine compliance. These recordkeeping and reporting requirements are established pursuant to CAA sections 110 (a)(2)(D) and (c) and 301 (a) (42 U.S.C . 7410 (a)(2)(D) and (c) and 7601 (a) ) and are specifically authorized by CAA section 114 (42 U.S.C. 7414). Reported data may also be used for other regulatory and programmatic purposes. All information submitted to the EPA for251

which a claim of confidentiali ty is made will be safeguarded according to EPA policies in 40 CFR part 2, subpart B, Confidentiality of Business Information. All of the EGUs that would be subject to changed information collection requirements under this proposed rule are already subject to information collection requirements under CSAPR. Most of these EGUs also are already subject to information collection requ irements under the Acid Rain Program (ARP) established under Title IV of the 1990 Clean Air Act Amendments. Both CSAPR and the ARP have existing approved ICRs: EPA ICR Number 2391.03/OMB Control Number 2060

- 0667 (CSAPR) and EPA ICR Number 1633.16/OMB Contr ol Number 2060

- 0258 (ARP). The burden and costs of the information collection requirements covered under the CSAPR ICR are estimated as incremental to the information collection requirements covered under the ARP ICR. Most of the information used to estima te burden and costs in this ICR was developed for the existing CSAPR and ARP ICRs. This proposed rule would change the universe of sources subject to certain information collection requirements under CSAPR but would not change the substance of any CSAPR i nformation collection requirements. The burden and costs associated with the proposed changes in the reporting universe are estimated as reductions from the burden and costs under the existing CSAPR ICR. (This proposed rule would not change any252

source’s in formation collection requirements with respect to the ARP.) The EPA intends to incorporate the burden and costs associated with the proposed changes in the reporting universe under this rule into the next renewal of the CSAPR ICR. Respondents/affected enti ties : Entities potentially affected by this proposed action are EGUs in the states of Florida, Kansas, and South Carolina that meet the applicability criteria for the CSAPR NO X Ozone

- Season Trading Program in 40 CFR 97.404. Respondent’s obligation to resp ond : Mandatory (sections 110(a) and 301(a) of the Clean Air Act). Estimated number of respondents : 116 sources in Florida, Kansas, and South Carolina with one or more EGUs
. Frequency of response : Quarterly, occasionally. Total estimated burden : reduction of 14,064 hours (per year). Burden is defined at 5 CFR 1320.3(b). Total estimated cost : reduction of $ 1,472,047 (per year), includes reduction of $ 450,951 operation and maintenance costs. The burden and cost estimates above reflect the reduction in burden and cost for Florida sources with EGUs that would no longer be required to report NO X mass emissions and heat input data for the ozone season to the EPA under the proposed rule and that ar e not subject to similar information collection requirements under the Acid Rain Program. Because t hese EGUs253

would no longer need to collect NO X emissions or heat input data under 40 CFR part 75, the estimates above also reflect the reduction in burden and cost to collect and quality assure these data and to maintain the associated monitoring equipment. The EPA estimates that the proposed rule would cause no change in information collection burden or cost for EGUs in Kansas that would be required to report NO X mass emissions and heat input data for the ozone season to the EPA or for EGUs in South Carolina that would no longer be required to report NO X emissions and heat input data for the ozone season to the EPA. The EGUs in both Kansas and South Carolina a lready are and would remain subject to requirements to report NO X mass emissions and heat input data for the entire year to the EPA under the CSAPR
NO X Annual Trading Program, and the requirements related to ozone season reporting are a subset of the requi rements related to annual reporting. Similarly, the EPA estimates that the proposed rule would cause no change in information collection burden or cost for EGUs in Florida that are subject to the Acid Rain Program because of the close similarity between th e information collection requirements under CSAPR and under the Acid Rain Program. More information on the ICR analysis is included in the docket for this rule.254

An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB control number. The OMB control numbers for the EPA’s regulations in 40 CFR are listed in 40 CFR part 9. Submit your comments on the Agency’s need for this information, the accuracy of the provided b urden estimates and any suggested methods for minimizing respondent burden to the EPA using the docket identified at the beginning of this rule. You may also send your ICR

- related comments to OMB’s Office of Information and Regulatory Affairs via email to oria_submissions@omb.eop.gov, Attention: Desk Officer for the EPA. Because OMB is required to make a decision concerning the ICR between 30 and 60 days after receipt, OMB must receive comments no later than [INSERT DATE 30 DAYS AFTER DATE OF
PUBLICATION IN THE FEDERAL REGISTER]. The EPA will respond to any ICR

- related comments in the final rule. The information collection requirements in the proposed rule have been submitted for approval to OMB under the PRA
. The information collection requirements are not enforceable until OMB approves them. The information collection activities in this proposed rule include monitoring and the maintenance of records.255

E. Regulatory Flexibility Act (RFA) I certify that this action will not have a significant economic impact on a substantial number of small entities under the RFA. The small entities subject to the requirements of this action are small businesses, small organizations, and small governmental jurisdictions
. The EPA has lessened the impacts for small entities by excluding all units smaller than 25 MWe. This exclusion, in addition to the exemptions for cogeneration units and solid waste incineration units, eliminates the burden of higher costs for a substantial number of small entities located in the 23 states for which the EPA is proposing FIPs. Within these states, t he EPA identified a total of 318 potentially affected EGUs (i.e., greater than 25 MWe) warranting examination in its RFA analysis. Of these, EPA i dentified 16 potentially affected EGUs that are owned by 7 entities that met the Small Business Administration’s criteria for identifying small entities. The EPA estimated the annualized net compliance cost to these 7 small entities to be approximately

- $3 8.3 million in 2017, or savings of $38.3 million. The fact that the net compliance costs for all entities are actually net savings does not mean that each small entity would benefit from the proposal to update CSAPR. The net savings are driven by entities that are able to increase their revenues by increasing256

generation. Of the 7 small entities considered in this analysis, 1 entity may experience compliance costs greater than 1 or 3 percent of generation revenues in 2017. Since this entity is not projected to operate in the base case, we are unable to compare the estimated compliance costs to base case generation revenues
. However, we note that this entity is located in a cost of service market, where typically we expect entities should be able to recover al l of their costs of complying with the proposal. EPA has concluded that there is no significant economic impact on a substantial number of small entities (No SISNOSE) for this rule. Details of this analysis are presented in the RIA, which is in the publi c docket.
F. Unfunded Mandates Reform Act (UMRA) This action does not contain an unfunded mandate of $100 million or more as described in UMRA, 2 U.S.C. 1531

– 1538, and does not significantly or uniquely affect small governments. However, t he EPA analyzed the economic impacts of the proposal on government entities. According to EPA’s analysis, the total net economic impact on government owned entities (state

- and municipality

- owned utilities and subdivisions) is expected to be negative (i.e., cost savings) in 2 014. Note that we expect the proposal to potentially have an impact on only one category of government

- owned entities (municipality

- owned entities). This257

analysis does not examine potential indirect economic impacts associated with the proposal, such as em ployment effects in industries providing fuel and pollution control equipment, or the potential effects of electricity price increases on government entities
. For more information on the estimated impact on government entities, refer to the RIA , which is i n the public docket.
E. Executive Order 13132: Federalism This action does not have federalism implications. It will not have substantial direct effects on the states, on the relationship between the national government and the states, or on the distribution of power and responsibilities among the various levels of government.

F. Executive Order 13175: Consultation and Coordination with Indian Tribal Governments This action has tribal implications. However, it will neither impose substantial direct compliance costs on federally recognized tribal governments, nor preempt tribal law. This action proposes to implement EGU NO X ozone season emissions reductions in 23 eastern states. However, at this time, n one of the existing or planned EGUs affect ed by this rule are owned by tribes or located in Indian country. This action may have tribal implications if a new affected EGU is built in258

Indian country. Additionally, tribes have a vested interest in how this proposed rule would affect air quality.
In developing CSAPR, which was promulgated on July 6, 2011
to address interstate transport of ozone pollution under the 1997 ozone NAAQS, 123 t he EPA consulted with tribal officials under the EPA Policy on Consultation and Coordination with Indian Tribes early in the process of developing that regulation to permit them to have meaningful and timely input into its development. A summary of that consultation is provided in 76 FR 48346 (August 8, 2011). EPA received comments from several tribal commenters regardin g the availability of CSAPR allowance allocations to new units in Indian country. EPA responded to these comments by instituting Indian country new unit set

- asides in the final CSAPR. In order to protect tribal sovereignty, these set

- asides are managed and distributed by the federal government regardless of whether CSAPR in the adjoining or surrounding state is implemented through a FIP or SIP. While there are no existing affected EGUs in Indian country covered by this proposal, the Indian country set

- aside s will ensure that any future new units built in Indian country will be able to obtain the necessary allowances. This proposal maintains the Indian country new unit

123 CSAPR also addressed interstate transport of fine particulate matter (PM2.5) under the 1997 and 2006 PM2.5 NAAQS.259

set

- aside and adjusts the amounts of allowances in each set

aside according to the same met hodology of the original CSAPR rule. The EPA has informed tribes of our development of this proposal through a National Tribal Air Association

– EPA air policy conference call (January 29, 2015)
. The EPA plans to further consult with tribal officials under the EPA Policy on Consultation and Coordination with Indian Tribes early in the process of developing this regulation to permit them to have meaningful and timely input into its development. The EPA will facilita te this consultation before finalizing this proposed rule. As required by section 7(a), the EPA’s Tribal Consultation Official has certified that the requirements of the executive order have been met in a meaningful and timely manner. A copy of the certifi cation is included in the docket for this action.

G. Executive Order 13045: Protection of Children from Environmental Health Risks and Safety Risks The EPA interprets EO 13045 (62 FR 19885, April 23, 1997) as applying to those regulatory actions that conc ern health or safety risks, such that the analysis required under section 5

– 501 of the Order has the potential to influence the regulation. This action is not subject to EO 13045 because it does not260

involve decisions on environmental health or safety risks that may disproportionately affect children. The EPA believes that the ozone

- related benefits, PM 2.5 - related co

- benefits, and CO 2 - related co

- benefits would further improve children’s health.
H. Executive Order 13211: Actions Concerning Regulations That
S ignificantly Affect Energy Supply, Distribution or Use This action, which is a significant regulatory action under EO 12866, is likely to have a significant effect on the supply, distribution, or use of energy. The EPA notes that one aspect of this proposa l that may affect energy supply, disposition or use is the EPA’s proposing and taking comment on a range of options with respect to use of 2015 vintage and 2016 vintage CSAPR NO X

ozone - season allowances for compliance with 2017 and later ozone season requirements. The EPA has prepared a Statement of Energy Effects for the proposed regulatory control alternative as follows. We estimate a much less than 1 percent change in retail electricity prices on average across the contiguous U.S. in 20 17 , an d a much less than 1 percent reduction in coal

- fired electricity generation in 2017 as a result of this rule. The EPA projects that utility power sector delivered natural gas prices will change by less than 1 percent in 20 17 . For more information on the es timated energy effects, refer to the RIA , which is in the public docket.261

I. National Technology Transfer and Advancement Act (NTTAA) This rulemaking does not involve technical standards.
J. Executive Order 12898: Federal Actions to Address Environmental Justice in Minority Populations and Low

- Income Populations The EPA believes the human health or environmental risk addressed by this action will not have potential disproportionately high and adverse human health or environmental eff ects on minority, low

- i ncome or indigenous populations. The EPA notes that this action proposes to update CSAPR to reduce interstate ozone transport with r espect to the 2008 ozone NAAQS. This rule uses EPA’s authority in CAA section 110(a)(2)(d) to reduce (nitrogen oxides) NO X pollution that significantly contributes to downwind ozone nonattainment or maintenance areas. As a result, the rule will reduce exposures to ozone in the most

- contaminated areas (i.e., areas that are not meeting the 2008 ozone Nation al Ambient Air Quality Standards (NAAQS)). In addition, the rule separately identifies both nonattainment areas and maintenance areas. This requirement reduces the likelihood that areas close to the level of the standard w ill exceed the current health

- base d standards in the future. The EPA proposes to implement these emission reductions262

using the CSAPR EGU NO X ozone - season emissions trading program with assurance provisions
. EPA recognizes that many environmental justice communities have voiced concerns in the past about emission trading and the potential for any emission increases in any location. The EPA believes that CSAPR mitigated these concerns and that this proposal, which applies the CSAPR framework to reduce interstate ozone pollution and implement these reductions, will also minimize community concerns. T he EPA seeks comment from communities on this proposal. Ozone pollution from power plants have both local and regional components: part of the pollution in a given location

— even in locations near em ission sources

— is due to emissions from nearby sources and part is due to emissions that travel hundreds of miles and mix with emissions from other sources. It is important to note that the section of the Clean Air Act providing authority for this rule, section 110(a)(2)(D), unlike some other provisions, does not dictate levels of control for particular facilities. CSAPR allows sources to trade allowances with other sources in the same or different states while firmly constraining any emissions shifting that may occur by requiring a strict emission ceiling in each state (the assurance level). In addition, assurance provisions in the rule outline the allowance s urrender penalties for failing to meet263

the assurance level; there are additional allowance penalties as well as financial penalties for failing to hold an adequate number of allowances to cover emissions. This approach reduces EGU emissions in each state that signif icantly contribute to downwind nonat tainment or maintenance areas, whi le allowing power companies to adjust
g eneration as needed and ensure that the co untry’s electricity needs will continue to be met. EPA maintains that th e existence of these a ssurance provi sions, including the penalties impos ed when triggered, will ensure that state emissions will stay below the level of the budget plus variability limit. In addition, all sour ces must hold en ough allowances to cover their emissions . Therefore, if a source emits more than i ts allocation in a given year, either another source must have used less than it s allocation and be willing to sell some of its excess allowances, or th e source it self had emitted less than its allocation in one or more previous years (i.e., banked allowances for future use). In summary, the CSAPR minimizes community concerns about localized hot spots and reduces ambient concentrations of pollution where they ar e most needed by sensitive and vulnerab le populations by: considering the science of ozone transport to
set str ict state emissions budgets to reduce signific ant contributions to ozone nonattainment and maintenance (i.e., the264

most polluted) areas; im plementing air quality

- assured trading; requiring any emissio ns above the level o f the allocations to be offset by em ission decreases; and imposing str ict penalties for sources that contribute to a state’s exceedance of its bud get plus variability limit. In addition , it is important to note that nothing in this fina l rule allows sources to viola te their title V permit or any other federal , state, or local emissions

or air quality requirements. In addition, it is important to note that CAA section 110(a)(2)(d), which addresses transport of criteria pollutants between states, is only one of many provisions of the CAA that provide EPA, states, and local governments with authorities to reduce exposure to ozone in communities. These legal authorities work together to reduce exposure to these pollutants in communities, incl uding for minority, low

- income, and tribal populations, and provide substantial health benefits to both the general public and sensitive sub

- populations.
The EPA has informed communities of our development of this proposal through an Environmental Justice community call (January 28, 2015) and a National Tribal Air Association

– EPA air policy conference call (January 29, 2015) . The EPA plans to further consult with communiti es early in the process of developing this regulation to permit them to have meaning ful and265

timely input into its development. The EPA will facilitate this engagement before finalizing this proposed rule.
K. Determination s Under Section 307 (b)(1) and (d) Section 307(b)(1) of the CAA indicates which Federal Courts of Appeal have venue for petitions of review of final actions by 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 promul gated, or final actio n taken, by the Administrator,” or (ii) such action is locally or regionally applicable, if “ such action is based on a 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.” The EPA proposes to find that any final action related to this rulemaking is “nationally applicable” or of “nationwide scope and effect” within the meaning of section 307(b)(1). Through this rulemaking action , the EPA interprets section 110 of the CAA, a provision which has nationwide applicability. In addition, the proposed rule would apply to 23 States. The proposed rule is also based on a common core of factual findings and analyses concerning the transport of pollutants between the different states subject to it. For these reasons, the Admin istrator proposes to determ ine that any final action266

related to the proposed rule is of nationwide scope and effect for purposes of section 307(b)(1). Thus, pursuant to section 307(b) any petitions for review of any final actions regarding the rulemaking would be filed in the Court of Appeals for the District of Columbia Circuit within 60 days from the date any final action is publ ished in the Federal Register. In additi on, pursuant to sections 307(d)(1)(C) and 307(d)(1)(V) of the CAA, the Administrator proposes to determine that this action is subject to the provisions of section 307(d). CAA section 307(d)(1)(B) provides that section 307(d) applies to, among other things , to “the promulgation or revision of an implementation plan by the Administrator under CAA section 110(c).” 42 U.S.C. 7407(d)(1)(B). Under section 307(d)(1)(V), the provisions of section 307(d) also apply to “such other actions as the Administrator may de termine.” 42 U.S.C. 7407(d)(1)(V). The Agency has complied with procedural requirements of CAA section 307(d) during the course of this rulemaking.267

Cross - State Air Pollution Rule Update for the 2008 Ozone NAAQS , Proposed Rule Page 267 of 34 7

List of Subjects in 40 CFR Parts 52, 78, and 97
. Environmental protection, Administrative practice and procedure, Air pollution control, Electric power plants, Nitrogen oxides, Reporting and record keeping requirements.

Dated:

Gina McCarthy, Administrator.268

For the reasons stated in the preamble, parts 52, 78, and 97 of chapter I of title 40 of the Code of Federal Regulations are proposed to be amended as follows: PART 52 —

APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS 1. The authority ci tation for part 52 continues to read as follows: Authority: 42 U.S.C. 7401 et seq . §§ 52.38, 52.39, 52.54, 52.55, 52.184, 52.540, 52.584, 52.585, 52.731, 52.732, 52.789, 52.790, 52.840, 52.841, 52.882, 52.883, 52.940, 52.941, 52.984, 52.1084, 52.1085, 52.1 186, 52.1187, 52.1240, 52.1241, 52.1284, 52.1326, 52.1327, 52.1428, 52.1429, 52.1584, 52.1585, 52.1684, 52.1685, 52.1784, 52.1785, 52.1882, 52.1883, 52.1930, 52.2040, 52.2041, 52.2140, 52.2141, 52.2240, 52.2241, 52.2283, 52.2284, 52.2440, 52.2441, 52.2540, 52.2541, 52.2587, and 52.2588 [Amended] 2. Sections 52.38, 52.39, 52.54, 52.55, 52.184, 52.540, 52.584, 52.585, 52.731, 52.732, 52.789, 52.790, 52.840, 52.841, 52.882, 52.883, 52.940, 52.941, 52.984, 52.1084, 52.1085, 52.1186, 52.1187, 52.1240, 52.1241, 52.1284, 52.1326, 52.1327, 52.1428, 52.1429, 52.1584, 52.1585, 52.1684, 52.1685, 52.1784, 52.1785, 52.1882, 52.1883, 52.1930, 52.2040, 52.2041, 52.2140, 52.2141, 52.2240, 52.2241, 52.2283, 52.2284, 52.2440, 52.2441, 52.2540, 52.2541, 52.2587, and 52.2588 a re amended by removing “TR Federal Implementation Plan” wherever it appears and adding269

in its place “CSAPR Federal Implementation Plan”, by removing “TR NO X ” wherever it appears and adding in its place “CSAPR NO X ”, and by removing “TR SO 2 ” wherever it appe ars and adding in its place “CSAPR SO 2 ”. §§ 52.540, 52.840, 52.841, 52.882, 52.883, 52.984, 52.1186, 52.1187, 52.1240, 52.1241, 52.1284, 52.1428, 52.1429, 52.1684, 52.1685, 52.1784, 52.1785, 52.2140, 52.2141, 52.2283, 52.2284, 52.2587, and 52.2588 [Amended] 3. Sections 52.540, 52.840, 52.841, 52.882, 52.883, 52.984, 52.1186, 52.1187, 52.1240, 52.1241, 52.1284, 52.1428, 52.1429, 52.1684, 52.1685, 52.1784, 52.1785, 52.2140, 52.2141, 52.2283, 52.2284, 52.2587, and 52.2588 are amended by removing “correcting in part the SIP's deficiency that is the basis for the CSAPR Federal Implementation Plan” wherever it appears and adding in its place “correcting the SIP’s deficiency that is the basis for the CSAPR Federal Implementation Plan”. Subpart A

— General Provisions § 52.36 [Amended] 4. Section 52.36 is amended in paragraph (e)(1)(i) by removing “paragraphs (a) through (e)” and adding in its place “paragraphs (a) through (c)”. 5. Section 52.38 is amended by :

a. R evising the section heading;270

b. In paragraph (a)(2), by removing “the sources in the following States” and adding in its place “sources in each of the following States”; c. In paragraph (a)(3)(ii), by adding “the” before “CSAPR
NO X Annual trading budget”; d. In paragraph (a)(3)(v)(A), by removing “paragra ph” and adding in its place “paragraphs”; e. In the table in paragraph (a)(4)(i)(B), by removing “annual” and adding in its place “Annual”, and by removing “administrator” and adding in its place “the Administrator”; f. In paragraph (a)(4)(ii), by removi ng “for the first control period” and adding in its place “applicable to the first control period”; g. In paragraph (a)(5) introductory text, by removing “in whole or in part, as appropriate,” and by removing “paragraphs (a)(1) through (4) of this section ” and adding in its place “paragraphs (a)(1) through (4) of this section with regard to sources in the State but not sources in any Indian country within the borders of the State”; h. In the table in paragraph (a)(5)(i)(B), by removing “annual” and adding in its place “Annual”, and by removing “administrator” and adding in its place “the Administrator”; i. In paragraph (a)(5)(iv), by adding after “97.412(b)” the words “of this chapter”;271

j. In paragraph (a)(5)(v), by removing “97.425, and” and adding in its place “and 97.425 of this chapter and”, and by adding after “other provisions” the words “of subpart AAAAA of part 97 of this chapter”; k. In paragraph (a)(5)(vi), by removing “paragraphs (a)(5)(i) and (ii)” and adding in its place “paragraph (a)(5)(i )”; l. In paragraph (a)(6), by removing “in whole or in part, as appropriate,”, by removing “described in paragraphs (a)(1) through (5)” and adding in its place “set forth in paragraphs (a)(1) through (4)”, and by removing “the sources” and adding in its place “sources”; m. In paragraph (a)(7), by removing “a State” and adding in its place “the State”; n. In paragraph (b)(1), by adding “subpart BBBBB of” before “part 97”;

o. R evising paragraph (b)(2);
p. R edesignating paragraph (b)(3) as paragraph (b)( 3)(i); in redesignated paragraph (b)(3)(i), by further redesignating paragraphs (i) through (v) as paragraphs (A) through (E); and in redesignated paragraph (b)(3)(i)(E), by further redesignating paragraphs (A) and (B) as paragraphs ( 1 ) and ( 2 );272

q. In re designated paragraph (b)(3)(i) introductory text, by removing “paragraph (b)(2)” and adding in its place “paragraph (b)(2)(i) or (ii)”; r. In redesignated paragraph (b)(3)(i)(B), by adding “the” before “CSAPR NO X Ozone Season trading budget”;
s. In redes ignated paragraph (b)(3)(i)(E)( 1 ), by removing “paragraph (b)(3)(i) through (iv)” and adding in its place “paragraphs (b)(3)(i)(A) through (D)”; t. In redesignated paragraph (b)(3)(i)(E)( 2 ), by removing “paragraph (b)(3)(v)(A)” and adding in its place “pa ragraph (b)(3)(i)(E)( 1 )”;

u. A dding a new paragraph (b)(3)(ii); v. In paragraph (b)(4) introductory text, by removing “paragraph (b)(2)” and adding in its place “paragraph (b)(2)(ii) or (iii)”; w. In paragraph (b)(4)(i), by removing “§§” and adding in i ts place “§”, by adding after “chapter” the words “with regard to the State”, and by removing “whenever” and adding in its place “wherever”;

x. R evising paragraph (b)(4)(ii) introductory text; y. In paragraph (b)(4)(ii)(B), by revising the table;
z. In paragraph (b)(5) introductory text, by removing “paragraph (b)(2)” and adding in its place “paragraph (b)(2)(ii) or (iii)”, by removing “in whole or in part, as appropriate,”,273

and by removing “paragraphs (b)(1) through (4) of this section” and adding in it s place “paragraphs (b)(1) through (4) of this section with regard to sources in the State but not sources in any Indian country within the borders of the State”; aa. In paragraph (b)(5)(i), by removing “§§” and adding in its place “§”, by adding after “c hapter” the words “with regard to the State”, and by removing “whenever” and adding in its place “wherever”; bb. R evising paragraph (b)(5)(ii) introductory text; cc. In paragraph (b)(5)(ii)(B), by removing “auction of CSAPR” and adding in its place “auct ions of CSAPR”, and by revising the table; dd. In paragraph (b)(5)(ii)(C), by removing “any control period” and adding in its place “any such control period”; ee. In paragraph (b)(5)(iii), by adding a comma after “May adopt”; ff. In paragraph (b)(5)(v), by adding after “97.512(b)” the words “of this chapter”; gg. In paragraph (b)(5)(vi), by removing “97.525, and” and adding in its place “and 97.525 of this chapter and”, and by adding after “other provisions” the words “of subpart BBBBB of part 97 of thi s chapter”; hh. In paragraph (b)(5)(vii), by removing “paragraph (b)(5)(i) through (v)” and adding in its place “paragraph274

(b)(5)(i) or (ii) of this section and paragraphs (b)(5)(iii) through (v)”, by removing “paragraphs (5)(ii)(B) and (C)” and adding in its place “paragraphs (b)(5)(ii)(B) and (C)”, and by removing “paragraphs (b)(5)(ii) and (iii)” and adding in its place “paragraph (b)(5)(i) or (ii)”; ii. In paragraph (b)(6), by removing “in whole or in part, as appropriate,”, and by removing “paragraph s (b)(1) through (5)” and adding in its place “paragraphs (b)(1) through (4)”;
and jj. In paragraph (b)(7), by removing “a State” and adding in its place “the State”; to read as follows: § 52.38 What are the requirements of the Federal Implementation Plans (FIPs) for the Cross - State Air Pollution Rule (CSAPR) relating to emissions of nitrogen oxides?
* * * * * (b) * * * (2) The provisions of subpart BBBBB of part 97 of this chapter apply to sources in each of the following States and Indi an country located within the borders of such States with regard to emissions in the following years: (i) With regard to emissions in 2015 and 2016 only, Florida and South Carolina;275

(ii) With regard to emissions in 2015 and each subsequent year, Alabama , Arkansas, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Michigan, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Virginia, West Virginia, and Wisconsin; and (iii) With rega rd to emissions in 2017 and each subsequent year, Kansas. (3) * * * (ii) Notwithstanding the provisions of paragraph (b)(1) of this section, a State other than Georgia listed in paragraph (b)(2)(ii) or (iii) of this section may adopt and include in a SIP revision, and the Administrator will approve, as CSAPR NO X Ozone Season allowance allocation provisions replacing the provisions in § 97.511(a) of this chapter with regard to the State and the control period in 2018, a list of CSAPR NO X Ozone
Season u nits and the amount of CSAPR NO X Ozone Season allowances allocated to each unit on such list, provided that the list of units and allocations meets the following requirements: (A) All of the units on the list must be units that are in the State and commen ced commercial operation before January 1, 2015; (B) The total amount of CSAPR NO X Ozone Season allowance allocations on the list must not exceed the amount, under276

§ 97.510(a) of this chapter for the State and the control period in 2018, of the CSAPR NO X O zone Season trading budget minus the sum of the new unit set

- aside and Indian country new unit set

aside; (C) The list must be submitted electronically in a format specified by the Administrator; and (D) The SIP revision must not provide for any change i n the units and allocations on the list after approval of the SIP revision by the Administrator and must not provide for any change in any allocation determined and recorded by the Administrator under subpart BBBBB of part 97 of this chapter; (E) Provided that: ( 1 ) By November 15, 2016, the State must notify the Administrator electronically in a format specified by the Administrator of the State's intent to submit to the Administrator a complete SIP revision meeting the requirements of paragraphs (b)(3)(i i)(A) through (D) of this section by April 1, 2017; and ( 2 ) The State must submit to the Administrator a complete SIP revision described in paragraph (b)(3)(ii)(E)( 1 ) of this section by April 1, 2017. (4) * * * (ii) The State may adopt, as CSAPR NO X Ozone Season allowance allocation or auction provisions replacing the277

provisions in §§97.511(a) and (b)(1) and 97.512(a) of this chapter with regard to the State and the control period in 2017 or any subsequent year or, for Kansas, 2019 or any subsequent
y ear, any methodology under which the State or the permitting authority allocates or auctions CSAPR NO X Ozone Season allowances and may adopt, in addition to the definitions in §97.502 of this chapter, one or more definitions that shall apply only to terms as used in the adopted CSAPR NO X Ozone Season allowance allocation or auction provisions, if such methodology

— * * * * * (B) * * * Year of the control period for which CSAPR NO X Ozone Season allowances are allocated or

auctioned Deadline for submission of allocations or auction results to the Administrator

2017 November 1, 2016. 2018 November 1, 2016. 2019 June 1, 2018. 2020 June 1, 2018. 2021 June 1, 2019. 2022 June 1, 2019.278

2023 and any year thereafter June 1 of the fourth year before the year of the control

period.

* * * * * (5) * * * (ii) May adopt, as CSAPR NO X Ozone Season allowance allocation provisions replacing the provisions in §§ 97.511(a) and (b)(1) and 97.512(a) of this chapter with regard to the State and the control period in 2019 or any subsequent year or, for Georgia, 2017 or any subsequent year, any methodology under which the State or the permitting authority allocates or auctions CSAPR NO X Ozone Season allowances and that

— * * * * * (B) * * * Year of the control period for which CSAPR NO X Ozone Season allowances are allocated or

auctioned Deadline for submission of allocations or auction results to the Administrator

2017 November 1, 2016. 2018 November 1, 2016. 2019 June 1, 2018.
2 020 June 1, 2018. 2021 June 1, 2019.279 2022 June 1, 2019. 2023 and any year thereafter June 1 of the fourth year before the year of the control

period.

* * * * * §52.39 What are the requirements of the Federal Implementation Plans (FIPs) for the Cross - State Air Pollution Rule (CSAPR) relating to emissions of sulfur dioxide? 6. Section 52.39 is amended by :

a. R evising the section heading as set forth above; b. In paragraph (d)(2), by adding “the” before “CSAPR SO 2 Group 1 trading budget”;
c. I n paragraph (d)(5)(i), by removing “paragraph (d)(1) through (4) ” and adding in its place “paragraphs (d)(1) through (4) ”; d. In paragraph (e)(1) introductory text, by adding after “with regard to” the words “the State and”; e. In paragraph (e)(1)(ii), b y removing “auction of CSAPR” and adding in its place “auctions of CSAPR”, and by removing in the table “administrator” and adding in its place “the Administrator”; f. In paragraph (f) introductory text, by removing “in whole or in part, as appropriate,”, and by removing “paragraphs280

(a), (b), (d), and (e) of this section” and adding in its place “paragraphs (a), (b), (d), and (e) of this section with regard to sources in the State but not sources in any Indian country within the borders of the State”;
g. In paragraph (f)(1) introductory text, by adding after “with regard to” the words “the State and”, and by removing “and any subsequent year” and adding in its place “or any subsequent year”; h. In paragraph (f)(1)(i), by removing “for such control period” and adding in its place “for any such control period”; i. In paragraph (f)(1)(ii), by removing “auction of CSAPR” and adding in its place “auctions of CSAPR”, and by removing in the table “administrator” and adding in its place “the Administrator”; j. I n paragraph (f)(1)(iv), by removing “paragraphs (f)(2)(ii) and (iii)” and adding in its place “paragraphs (f)(1)(ii) and (iii)”; k. In paragraph (f)(4), by adding after “97.612(b)” the words “of this chapter”; l. In paragraph (f)(5), by removing “97.625, and” and adding in its place “and 97.625 of this chapter and”, and by adding after “other provisions” the words “of subpart CCCCC of part 97 of this chapter”;281

m. In paragraph (f)(6), by removing “hold an auction under paragraph (f)(1)(ii) and (iii)” and adding in its place “hold an auction under paragraph (f)(1)”; n. In paragraph (g) introductory text, by adding after “with regard to” the words “the State and”; o. In paragraph (g)(2), by adding “the” before “CSAPR SO 2 Group 2 trading budget”; p. In paragraph (g)(5)(i), by removing “paragraph (g)(1) through (4) ” and adding in its place “paragraphs (g)(1) through (4) ”; q. In paragraph (h)(1) introductory text, by adding after “with regard to” the words “the State and”, and by removing “and any subsequ ent year” and adding in its place “or any subsequent year”; r. In paragraph (h)(1)(ii), by removing “auction of CSAPR” and adding in its place “auctions of CSAPR”, and by removing in the table “administrator” and adding in its place “the Administrator”; s. In paragraph (h)(2), by removing “hold an auction under paragraph (h)(1)(ii) and (iii)” and adding in its place “hold an auction under paragraph (h)(1)”; t. In paragraph (i) introductory text, by removing “in whole or in part, as appropriate,”, and by removing “paragraphs (a), (c), (g), and (h) of this section” and adding in its place282

“paragraphs (a), (c), (g), and (h) of this section with regard to sources in the State but not sources in any Indian country within the borders of the State”; u. In paragr aph (i)(1) introductory text, by adding after “with regard to” the words “the State and”, and by removing “and any subsequent year” and adding in its place “or any subsequent year”; v. In paragraph (i)(1)(ii), by removing “auction of CSAPR” and adding in its place “auctions of CSAPR”, and by removing in the table “administrator” and adding in its place “the Administrator”; w. In paragraph (i)(4), by adding after “97.712(b)” the words “of this chapter”; x. In paragraph (i)(5), by removing “97.725, and” a nd adding in its place “and 97.725 of this chapter and”, and by adding after “other provisions” the words “of subpart DDDDD of part 97 of this chapter”; y. In paragraph (i)(6), by removing “hold an auction under paragraphs (i)(1)(ii) and (iii)” and adding in its place “hold an auction under paragraph (i)(1)”; z. In paragraph (j), by removing “in whole or in part, as appropriate,”, by adding after “CSAPR Federal Implementation Plan” the words “set forth in paragraphs (a), (b), (d), and (e) of this section or paragraphs (a), (c), (g), and (h) of this283

section, as applicable”, and by removing “paragraph (b) and (c)” and adding in its place “paragraph (b) or (c)”; and aa. In paragraph (k), by removing “a State” and adding in its place “the State”. Subpart B

— Al abama § 52.54 [Amended] 7. Section 52.54 is amended in paragraph (b)(2) by removing “the” before “Alabama’s SIP revision”. Subpart K

— Florida 8. Section 52.540 is amended by adding a new paragraph (c) to read as follows: § 52.540 Interstate pollutant tran sport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?
* * * * * (c) Notwithstanding paragraph (a) of this section, no source or unit located in the State of Florida or Indian country within the borders of the State shall be required under paragraph (a) of this section to comply with the requirements set forth under the CSAPR NO X Ozone Season Trading Program in subpart BBBBB of part 97 of this chapter with regard to emissions after 2016. Subpart R

— Kansas 9. Section 52.882 is amended by revising paragraph (b) to read as follows:284

§ 52.882 Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?
* * * * * (b)(1) The owner and operator of each source and each unit located in the State of Kansas and Indian country within the borders of the State and for which requirements are set forth under the CSAPR NO X Ozone Season Trading Program in subpart BBBBB of part 97 of this chapter must comply wi th such requirements. The obligation to comply with such requirements with regard to sources and units in the State will be eliminated by the promulgation of an approval by the Administrator of a revision to Kansas' State Implementation Plan (SIP) as corre cting the SIP's deficiency that is the basis for the CSAPR Fede ral Implementation Plan under § 52.38(b), except to the extent the Administrator's approval is partial or conditional. The obligation to comply with such requirements with regard to sources and units located in Indian country within the borders of the State will not be eliminated by the promulgation of an approval by the Administrator of a revision to Kansas' SIP. (2) Notwithstanding the provisions of paragraph (b)(1) of this section, if, at the time of the approval of Kansas' SIP revision described in paragraph (b)(1) of this section, the Administrator has already started recording any allocations of285

CSAPR NO X Ozone Season allowances under subpart BBBBB of part 97 of this chapter to units in the State for a control period in any year, the provisions of subpart BBBBB of part 97 of this chapter authorizing the Administrator to complete the allocation and recordation of CSAPR NO X Ozone Season allowances to units in the State for each such control pe riod shall continue to apply, unless provided otherwise by such approval of the State's SIP revision. Subpart X

— Michigan § 52.1187 [Amended] 10. Section 52.1187 is amended in paragraph (c)(2) by removing “Maryland’s SIP revision” and adding in its place “Michigan’s SIP revision”. Subpart PP

— South Carolina 11. Section 52.2140 is amended by adding a new paragraph (b)(3) to read as follows: § 52.2140 Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitro gen oxides?
* * * * * (b) * * * (3) Notwithstanding paragraph (b)(1) of this section, no source or unit located in the State of South Carolina or Indian country within the borders of the State shall be required under286

paragraph (b)(1) of this section to comply with the requirements set forth under the CSAPR NO X Ozone Season Trading Program in subpart BBBBB of part 97 of this chapter with regard to emissions after 2016. PART 78 —

APPEAL PROCEDURES 12. The authority citation for part 78 continues to read as follows: Authority: 42 U.S.C. 7401, 7403, 7410, 7411, 7426, 7601, and 7651, et seq . §§78.1 and 78.4 [Amended] 13. Sections 78.1 and 78.4 are amended by removing “TR NO X ” wherever it appears and adding in its place “CSAPR NO X ”, and by removing “TR SO 2 ” wherever it appears and adding in its place

“ CSAPR SO 2 ”. 14. Section 78.1 is amended by : a. In paragraph (a)(1), by adding after “part 97 of this chapter” the words “or Sta te regulations approved under § 52.38(a)(4) or (5) or (b)(4) or (5) of this chapter or § 52.39(e), (f), (h), or (i) of this chapter” , and by adding a

new third sentence at the end of the paragraph ; b
. A dding a new paragraph (b)(14)(viii); and

c . In paragraphs (b)(16)(ii), (iii), and (v), by removing “SO 2 Group 1” and adding in its place “SO 2 Group 2”; to read as follows:287

§ 78.1 Purpose and scope. (a)(1) * * * All references in paragra ph (b) of this section and in § 78.3 to subpart AAAAA of part 97 of this chapter, subpart BBBBB of part 97 of this chapter, subpart CCCCC of part 97 of this chapter, and subpart DDDDD of part 97 of this chapter shall be read to include the comparable provisions in
Sta te regulations approved under § 52.38( a)(4) or (5) of this chapter, § 52.38( b)(4) or (5) of this chapter, § 52.39(e ) or (f) of this chapter, and § 52.39(h) or (i) of this chapter, respectively.
* * * * * (b) * * * (14) * * * (viii) The determination of the tonnage equivalent of a
CSAPR NO X Ozone Season allowance under § 97.524(f) of this cha pter. * * * * * § 78.4 [Amended] 15. Section 78.4 is amended in paragraph (a)(1)(i) by removing “a affected” and adding in its place “an affected”, by adding “or” before “CSAPR SO 2 Group 2 unit”, and by removing “, or a unit for which a TR opt

- i n application is submitted and not withdrawn”.288

PART 97 — FEDERAL NO X BUDGET TRADING PROGRAM, CAIR NO X AND SO 2 TRADING PROGRAMS, AND CSAPR NO X AND SO 2 TRADING PROGRAMS 16. The heading of part 97 is revised to read as set forth above. 17. The authority citat ion for part 97 continues to read as follows: Authority: 42 U.S.C. 7401, 7403, 7410, 7426, 7601, and 7651, et seq . §§ 97.401 through 97.735 [Amended] 18. Sections 97.401 through 97.735 are amended by removing “Transport Rule (TR)“ wherever it ap pears and a dding in its place “ Cross

- State Air Pollution Rule (CSAPR)”, by removing “TR
NO X ” wherever it appears and adding in its place “CSAPR NO X ”, and by removing “TR SO 2 ” wherever it appears and adding in its place “CSAPR SO 2 ”. Subpart AAAAA

— CSAPR NO X Annual Trading Program 19. The heading of subpart AAAAA of part 97 is revised to read as set forth above. § 97.402 [Amended] 20. Section 97.402 is amended by :

a. R elocating all definitions beginning with “ CSAPR ” to their alphabetical locations in the lis t of definitions; b. In the definition of “ Cogeneration system ”, by removing “steam turbine generator” and adding in its place “generator”;289

c. In the definition of “ Commence commercial operation ”, in paragraph (2) introductory text, by adding after “defi ned in” the word “the”; d. In the definition of “ CSAPR NO X Annual allowances held or hold TR NO 4 Annual allowances ”, by removing “ TR NO 4 ” and adding in its place “ CSAPR NO X ”; e. In the definition of “ CSAPR SO 2 Group 2 Trading Program ”, by removing “52.39 (a)” and adding in its place “§52.39(a)”; f. In the definition of “ Fossil fuel ”, by removing “§§” and adding in its place §”; g. In the definition of “ Owner ”, by removing the paragraph designator “3)” and adding in its place the paragraph designator “(3) ”; and h. In the definition of “ Sequential use of energy ”, in paragraph (2), by adding after “from” the word “a”. § 97.404 [Amended] 21. Section 97.404 is amended in paragraph (b)(2)(ii) by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(2)(i)”. § 97.406 [Amended] 22. Section 97.406 is amended in the heading of paragraph (c)(4) by adding “CSAPR NO X Annual” before “allowances”. §97.410 State NO X Annual trading budgets, new unit set - asides, Indian country new unit set - asides, and variability limits.290

23. Section 97.410 is amended by :

a. R evising the heading as set forth above; b. R emoving “NO X annual trading budget” wherever it appears and addin g in its place “NO X Annual trading budget”;

c. R emoving “NO X annual new unit set

- aside” wherever it appears and adding in its place “new unit set

- aside”; d. R emoving “NO X annual Indian country new unit set

- aside” wherever it appears and adding in its pla ce “Indian country new unit set

- aside”;

e. R emoving “NO X annual variability limit” wherever it appears and adding in its place “variability limit”; f. In paragraph (a) introductory text, by removing “new unit

- set aside” and adding in its place “new unit set

- aside”;
g. A dding and reserving paragraphs (a)(11)(vi) and (a)(16)(vi); and h. I n paragraph (c), by adding after “Each” the word “State”, by removing “identified”, and by removing “set aside” wherever it appears and adding in its place “set

- aside”. § 97.411 [Amended] 24. Section 97.411 is amended by : a. In paragraphs (b)(1)(iii) and (b)(2)(iii), by adding after “November 30 of” the word “the”; b. In paragraph (c)(1)(ii), by removing “§ 52.38(a)(3), (4), or (5)” and adding in its place “§ 52.38(a)(4) or (5)”;291

c. In paragraph ( c)(5)(i)(B), by adding after “§ 52.38(a)(4) or (5)” the words “of this chapter”; d. In paragraph (c)(5)(ii) introductory text, by removing “of this paragraph” and adding in its place “of this section”; e. In paragraph (c )(5)(ii )(B), by adding after “§ 52.38(a)(4) or (5)” the words “of this chapter”; and f. In paragraph (c)(5)(iii), by removing “of this paragraph” and adding in its place “of this section”. § 97.412 [Amended] 25. Section 97.412 is amended by : a. In paragraph (a) (2), by removing “§§” and adding in its place “§”; b. In paragraph (a)(4)(i), by removing “paragraph (a)(1)(i) through (iii)” and adding in its place “paragraphs (a)(1)(i) through (iii)”; c. In paragraph (a)(4)(ii), by adding after “paragraph (a)(4)(i)” the words “of this section”; d. In paragraph (a)(9)(i), by adding after “November 30 of” the word “the”; e. In paragraph (b)(4)(ii), by adding after “paragraph (b)(4)(i)” the words “of this section”; f. In paragraph (b)(9)(i), by adding after “November 30 of” the word “the”; and292

g. In paragraph (b)(10)(ii), by adding after “§ 52.38(a)(4) or (5)” the words “of this chapter”. § 97.421 [Amended] 26. Section 97.421 is amended by : a. In paragraphs (c), (d), and (e), by removing “period” and adding in its pla ce “periods”; and b. In paragraph (j), by removing “the date” and adding in its place “the date 15 days after the date”. § 97.425 [Amended] 27. Section 97.425 is amended by : a. In paragraph (b)(2)(iii) introductory text, by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(1)(ii)”; b. In paragraph (b)(2)(iii)(B), by adding “the calculations incorporating” before “any adjustments”; c. In paragraph (b)(4)(i), by removing “the” before “them”;
and d. In paragraph (b)(6)(iii)(B), by rem oving after “appropriate” the word “at”. § 97.426 [Amended] 28. Section 97.426 is amended in paragraph (b) by removing “97.427, or 97. 428” and adding in its place “§97.427, or § 97.428”. § 97.428 [Amended]293

29. Section 97.428 is amended in paragraph (b) by r emoving “paragraph (a)(1)” and adding in its place “paragraph (a)”. § 97.430 [Amended] 30. Section 97.430 is amended by : a. In paragraph (b) introductory text, by adding after “operator” the words “of a CSAPR NO X Annual unit”, by adding “the later of” befo re “the following dates” each time it appears, and by removing the final period and adding in its place a colon; b. R emoving paragraphs (b)(1) and (b)(2) introductory text;

c. R edesignating paragraphs (b)(2)(i) and (ii) as paragraphs (b)(1) and (2); d. In redesignated paragraph (b)(2), by removing the final semicolon and adding in its place a period; e. In paragraph (b)(3) introductory text , by removing “§§” and adding in its place “§”; and f. In paragraph (b)(3)(iii), by adding after “§75.66” the words “of this chapter”. §97.431 [Amended] 31. Section 97.431 is amended in paragraph (d)(3) introductory text by removing “§§” and adding in its place “§”. §97.434 [Amended] 32. Section 97.434 is amended by : a. In paragraph (b) by adding “the” before “requirements”;294

b. In paragraph (d)(1) introductory text, by removing “the CSAPR” and adding in its place “a CSAPR”, and by adding “the later of” before the final colon; c. In paragraph (d)(1)(i), by removing “For a unit that commences commercial operation before July 1, 2014, the” and adding in its place “The”; and d. In paragraph (d)(1)(ii), by removing “For a unit that commences commercial operation on or after July 1, 2014, the” and adding in its place “The”, and by removing “, unless that quarter is th e third or fourth quarter of 2014, in which case reporting shall commence in the quarter covering January 1, 2015 through March 31, 2015”. Subpart BBBBB

— CSAPR NO X Ozone Season Trading Program 33. The heading of subpart BBBBB of part 97 is revised to read a s set forth above. 34. Section 97.502 is amended by :

a. R elocating all definitions beginning with “ CSAPR ” to their alphabetical locations in the list of definitions; b. In the definition of “ Cogeneration system ”, by removing “steam turbine generator” an d adding in its place “generator”; c. In the definition of “ Commence commercial operation ”, in paragraph (2) introductory text, by adding after “defined in” the word “the”;295

d. R evising the definitions of “ CSAPR NO X Ozone Season allowance ” and “ CSAPR NO X Ozone Season emissions limitation ”; e. In the definitions of “ CSAPR SO 2 Group 1 Trading Program ” and “ CSAPR SO 2 Group 2 Trading Program ”, by removing “52.39(a) ” and adding in in its place “§ 52.39(a)”; f. In the definition of “ Fossil fuel ”, by removing “ §§” and adding in its place §”; g. In the definition of “ Sequential use of energy ”, in paragraph (2), by adding after “from” the word “a”; and h. A dding, in alphabetical order, a new definition of

“ Tonnage equivalent ”; to read as follows: §97.502 Defin itions.
* * * * *
CSAPR NO X Ozone Season allowance means a limited authorization under the CSAPR NO X Ozone Season Trading Program issued and allocated or auctioned to a CSAPR NO X Ozone Season unit in a State (or Indian country within the borders of such State) by the Administrator under this subpart, or by the State or permitting authority under a SIP revision approved by the Administrator under §52.38(b)(3), (4), or (5) of this chapter, to emit either: (1) One ton of NO X in the State (or Indian country located within the borders of such State) during a control period of the296

specified calendar year for which the authorization is allocated or auctioned; or (2) As determined under § 97.524(f), up to one ton of NO X in another State (or Indian country located within the borders of another State) or during a control period after the specified calendar year for which the authorization is allocated or auctioned.
* * * * *
CSAPR NO X Ozone Season emissions limitation means, for a
CSAPR NO X Ozone S eason source, the tonnage of NO X emissions authorized in a control period in a given year by the tonnage equivalent of CSAPR NO X Ozone Season allowances available for d eduction for the source under § 97.524(a) for such control period.
* * * * *
To nnage equivalent means, with regard to a specific individual CSAPR NO X Ozone Season allowance held or deducted for an identified purpose, the portion of one ton represented by the
CSAPR NO X Ozone Season a llowance as determined under § 97.524(f) or, with reg ard to a specific group of CSAPR NO X Ozone Season allowances held or deducted for a common identified purpose, the unrounded sum of the tonnage equivalents of the individual CSAPR
NO X Ozone Season allowances comprising the group.
* * * * *297

§ 97.504 [Amended] 35. Section 97.504 is amended in paragraph (b)(2)(ii) by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(2)(i)”, and by removing “TR NOX" and adding in its place “CSAPR NO X ”. 36. Section 97.506 is amended by :

a. R evising paragraphs (c)(1)(i), (c)(2)(i) introductory text, and (c)(2)(v)(B); b. R edesignating paragraph (c)(3)(i) as paragraph (c)(3)(i)(A), and by revising the redesignated paragraph;

c. A dding a new paragraph (c)(3)(i)(B); d. In the heading of paragraph (c)(4 ), by adding “CSAPR NO X Ozone Season” before “allowances”; and

e. R evising paragraph (c)(6) introductory text; to read as follows: §97.506 Standard requirements.
* * * * * (c) * * * (1) * * * (i) As of the allowance transfer deadline f or a control period in a given year, the owners and operators of each CSAPR
NO X Ozone Season source and each CSAPR NO X Ozone Season unit at the source shall hold, in the source's compliance account, CSAPR
NO X Ozone Season allowances available for deduction for such298

control period under § 97.524(a) with a tonnage equivalent not less than the tons of total NO X emissions for such control period from all CSAPR NO X Ozone Season units at the source.
* * * * * (2) * * * (i) If total NO X emissions during a control period in a given year from all CSAPR NO X Ozone Season units at CSAPR NO X Ozone Season sources in a State (and Indian country within the borders of such State) exceed the State assurance level, then the owners and operators of such sources and u nits in each group of one or more sources and units having a common designated representative for such control period, where the common designated representative's share of such NO X emissions during such control period exceeds the common designated
represe ntative's assurance level for the State and such control period, shall hold (in the assurance account established for the owners and operators of such group) CSAPR NO X Ozone Season allowances available for deduction for such control period under § 97.525(a) with a tonnage equivalent not less than two times the product (rounded to the nearest whole number), as determined by the Adm inistrator in accordance with § 97.525(b), of multiplying

— * * * * * (v) * * *299

(B) Each ton of the tonnage equivalent of CSAPR NO X Ozone Season allowances that the owners and operators fail to hold for such control period in accordance with paragraphs (c)(2)(i) through (iii) of this section and each day of such control period shall constitute a separate violation of this subpart and the Clean Air Act. (3) * * * (i)(A) Except as provided in paragraph (c)(3)(i)(B) of this section, a CSAPR NO X Ozone Season unit shall be subject to the requirements under paragraph (c)(1) of this section for the control period starting on the later of May 1, 2015 or the deadline for meeting the unit's monitor cer tification requirements under § 97.530(b) and for each control period thereafter. (B) A CSAPR NO X Ozone Season unit in the State of Kansas (or Indian country within the borders of t he State) that is not a
CSAPR NO X Ozone Season unit in another State (or Indian country within the borders of another State) during any portion of a control period in 2015 or 2016 shall be subject to the requirements under paragraph (c)(1) of this section for the control period starting on the later of May 1, 2017 or the deadline for meeting the unit's monitor cer tification requirements under § 97.530(b) and for each control period thereafter.300

* * * * * (6) Limited authorization. A CSAPR NO X Ozone S eason allowance is a limited authorization to emit up to one ton of NO X during the control period in one year as determined under § 97.524(f). Such authorization is limited in its use and duration as follows:
* * * * * 37. Section 97.510 is revised to read as follows: §97.510 State NO X Ozone Season trading budgets, new unit set asides, Indian country new unit set - asides, and variability limits. (a) The State NO X Ozone Season trading budgets, new unit
set

- asides, and Indian country new unit set

- asides for allocations of CSAPR NO X Ozone Season allowances for the control periods in 2015 and thereafter are as follows: (1) Alabama . (i) The NO X Ozone Season trading bu dget for 2015 and 2016 is 31,746 tons. (ii) The new unit set

- aside for 2015 and 2016 is 635 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 9,979 tons. (v) The new unit set

- aside for 2017 and thereafter is 205
tons. (vi) [Reserved]301

(2) Arkansas . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 15,110 tons. (ii) The new unit set

- aside for 2015 and 2016 is 756 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 6, 949 tons. (v) The new unit set

- aside for 2017 and thereafter is 1 41
tons. (vi) [Reserved] (3) Florida . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 28,644 tons. (ii) The new unit set

- aside for 2015 and 2016 is 544 tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 29 tons. (iv) [Reserved] (v) [Reserved] (vi) [Reserved] (4) Georgia . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 27,944 tons. (ii) The new unit set

- aside for 2015 and 2016 is 559 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 24,041 tons.302

(v) The new unit set

- aside for 2017 and thereafter is 481
tons. (vi) [Reserved] (5) Illinois . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 21,208 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,697
tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 12,0 78 tons. (v) The new unit set

- aside for 2017 and thereafter is 5 91
tons. (vi) [Reserved] (6) Indiana . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 46,876 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,406
tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 28,284 t ons. (v) The new unit set

- aside for 2017 and thereafter is 565
tons. (vi) [Reserved]303

(7) Iowa . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 16,532 tons. (ii) The new unit set

- aside for 2015 and 2016 is 314 tons. (iii) The Indian countr y new unit set

- aside for 2015 and 2016 is 17 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 8,351 tons. (v) The new unit set

- aside for 2017 and thereafter is 411
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 8 tons. (8) Kansas . (i) [Reserved] (ii) [Reserved] (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 9,272 tons. (v) The new unit set

- aside for 2017 and thereafter is 272
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 9 tons. (9) Kentucky . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 36,167 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,447
tons.304

(iii) [Reserved] (iv) The NO X Ozone Season tradin g budget for 2017 and thereafter is 21,519 tons. (v) The new unit set

- aside for 2017 and thereafter is 647
tons. (vi) [Reserved] (10) Louisiana . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 18,115 tons. (ii) The new unit set

- aside for 2 015 and 2016 is 344 tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 18 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 15, 807 tons. (v) The new unit set

- aside for 2017 and thereafter is 612
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 16 tons. (11) Maryland . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 7,179 tons. (ii) The new unit set

- aside for 2015 and 2016 is 144 tons. (iii) [Reserved] (iv) The NO X O zone Season trading budget for 2017 and thereafter is 4,026 tons.305

(v) The new unit set

- aside for 2017 and thereafter is 485
tons. (vi) [Reserved] (12) Michigan . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 28,041 tons. (ii) The new unit set

- aside for 2015 and 2016 is 533 tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 28 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 19,115 tons. (v) The new unit set

- aside for 2017 and thereafter is 3 6 3
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 1 9 tons. (13) Mississippi . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 12,429 tons. (ii) The new unit set

- aside for 2015 and 2016 is 237 tons. (iii) The Indi an country new unit set

- aside for 2015 and 2016 is 12 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 5,910 tons. (v) The new unit set

- aside for 2017 and thereafter is 584
tons.306

(vi) The Indian country new unit set

- aside for 20 17 and thereafter is 6 tons. (14) Missouri . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 22,788 tons. (ii) The new unit set

- aside for 2015 is 684 tons and for 2016 is 1,367 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 1 5,323 tons. (v) The new unit set

- aside for 2017 and thereafter is 314
tons. (vi) [Reserved] (15) New Jersey . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 4,128 tons. (ii) The new unit set

- aside for 2015 and 2016 is 83 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 2,015 tons. (v) The new unit set

- aside for 2017 and thereafter is 1,151
tons. (vi) [Reserved] (16) New York . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 10,369 tons. (ii) The new unit set

- aside for 2015 and 2016 is 197 tons.307

(iii) The Indian country new unit set

- aside for 2015 and 2016 is 10 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 4,450 tons. (v) T he new unit set

- aside for 2017 and thereafter is 89
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 4 tons. (17) North Carolina . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 22,168 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,308
tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 22 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 12,275 tons. (v) The new unit set

- aside for 2017 and thereafter is 236
t ons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 12 tons. (18) Ohio . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 41,284 tons. (ii) The new unit set

- aside for 2015 and 2016 is 826 tons. (iii) [Reserved]308

(iv) The NO X Ozone Season trading budget for 2017 and thereafter is 16,660 tons. (v) The new unit set

- aside for 2017 and thereafter is 337
tons. (vi) [Reserved] (19) Oklahoma . (i) The NO X Ozone Season trading budget for 2015 is 36,567 tons and for 2016 is 22 ,694 tons. (ii) The new unit set

- aside for 2015 is 731 tons and for 2016 is 454 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 16,215 tons. (v) The new unit set

- aside for 2017 and thereafter is 3 09
tons. (vi ) The Indian country new unit set

- aside for 2017 and thereafter is 1 6 tons. (20) Pennsylvania . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 52,201 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,044
tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 14,387 tons.309

(v) The new unit set

- aside for 2017 and thereafter is 1,017
tons. (vi) [Reserved] (21) South Carolina . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 13,909 tons. (ii) The new unit set

- aside for 2015 and 2016 is 264 tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 14 tons. (iv) [Reserved] (v) [Reserved] (vi) [Reserved] (22) Tennessee . (i) The NO X Ozone Season trading budget for 2015 and 2 016 is 14,908 tons. (ii) The new unit set

- aside for 2015 and 2016 is 298 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 5,481 tons. (v) The new unit set

- aside for 2017 and thereafter is 109
tons. (vi) [Reser ved] (23) Texas . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 65,560 tons. (ii) The new unit set

- aside for 2015 and 2016 is 2,556
tons.310

(iii) The Indian country new unit set

- aside for 2015 and 2016 is 66 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 5 8,002 tons. (v) The new unit set

- aside for 2017 and thereafter is 2, 852
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 58 tons. (24) Virginia . (i) The NO X Ozone Season trading budge t for 2015 and 2016 is 14,452 tons. (ii) The new unit set

- aside for 2015 and 2016 is 723 tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 6,818 tons. (v) The new unit set

- aside for 2017 and thereafter is 1, 844
tons. (vi) [Reserved] (25) West Virginia . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 25,283 tons. (ii) The new unit set

- aside for 2015 and 2016 is 1,264
tons. (iii) [Reserved] (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 13,390 tons.311

(v) The new unit set

- aside for 2017 and thereafter is 268
tons. (vi) [Reserved] (26) Wisconsin . (i) The NO X Ozone Season trading budget for 2015 and 2016 is 14,784 tons. (ii) The new unit set

- aside for 2015 and 2016 is 872 tons. (iii) The Indian country new unit set

- aside for 2015 and 2016 is 15 tons. (iv) The NO X Ozone Season trading budget for 2017 and thereafter is 5,561 tons. (v) The new unit set

- aside for 2017 and thereafter is 115
tons. (vi) The Indian country new unit set

- aside for 2017 and thereafter is 6 tons. (b) The States' variability limits for the State NO X Ozone Season trading budgets for the control periods in 2017 and thereafter are as follows: (1) The variability limit for Alabama is 2,096 tons. (2) The variability limit for Arkansas is 1,459 tons. (3) [Reserved] (4) The variability limit for Georgia is 5,049 tons. (5) The variability limit for Illinois is 2,536 tons. (6) The variability limit for Indiana is 5,940 tons. (7) The variability limit for Iowa is 1,754 tons.312

(8) The variability limit for Kansas is 1,947 tons. (9) The variability limit for Kentucky is 4,519 tons. (10) The variability limit for Louisiana is 3,319 tons. (11) The variability limit for Maryland is 845 tons. (12) The variability limit for Michigan is 4,014 tons. (13) The variability limit for Mississippi is 1,241 tons. (14) The variability limit for Missouri is 3,218 tons. (15) The variability limit for New Jersey is 423 tons. (16) The variability limit for New York is 935 tons. (17) The variability limit for North Carolina is 2,578
tons. (18) The variability limit for Ohio is 3,499 tons. (19) The variability limit for Oklahoma is 3,405 tons. (20) The variability limit for P ennsylvania is 3,021 tons. (21) [Reserved] (22) The variability limit for Tennessee is 1,151 tons. (23) The variability limit for Texas is 12,180 tons. (24) The variability limit for Virginia is 1,432 tons. (25) The variability limit for West Virginia is 2,812 tons. (26) The variability limit for Wisconsin is 1,168 tons. (c) Each State NO X Ozone Season trading budget in this section includes any tons in a new unit set

- aside or Indian country new unit set

- aside, but does not include any tons in a vari ability limit.313

38. Section 97.511 is amended by : a. In paragraphs (b)(1)(iii) and (b)(2)(iii), by adding after “August 31 of” the word “the”; b. In paragraph (b)(2)(iv)(B), by adding a paragraph break after the end of the second sentence and before the paragraph designator “(v)” for the following paragraph (b)(2)(v); c. In parag raph (c)(1)(ii), by removing “§ 52.38(b)(3), (4),

or (5)” and adding in its place “§ 52.38(b)(4) or (5)”, and by removing “January 1” and adding in its place “May 1”; d. R evising paragraph (c)(3); e. In paragraph (c)(5)(i)(B), by adding after “§ 52.38(b)(4) or (5)” the words “of this chapter”; f. In paragraph (c)(5)(ii) introductory text, by removing “of this paragraph” and adding in its place “of this section”; g. In paragraph ( c )(5)(ii)(B), by adding after “§ 52.38(b)(4) or (5)” the words “of this chapter”; and h. In paragraph (c)(5)(iii), by removing “of this paragraph” and adding in its place “of this section”;
T o read as follows: §97.511 Timing requirements for CSAPR NO X Ozon e Season allowance allocations.
* * * * * (c) * * *314

(3) If the Administrator already recorded such CSAPR NO X Ozone Season allowances under § 97.521 and if the Administrator makes the determination under paragraph (c)(1) of this section before ma king deductions for the source that includes such recipient under § 97.524(b) for such control period, then the Administrator will deduct from the account in which such CSAPR
NO X Ozone Season allowances were recorded CSAPR NO X Ozone Season allowances alloca ted for the same or a prior control period until the tonnage equivalent of the CSAPR NO X Ozone Season allowances deducted under this paragraph equals or exceeds the tonnage equivalent of such already recorded CSAPR NO X Ozone Season allowances , making all s uch deductions in whole CSAPR NO X Ozone Season allowances . The authorized account representative shall ensure that there are CSAPR NO X Ozone Season allowances in such account with a tonnage equivalent sufficient for completion of the deduction.
* * * * * 39. Section 97.512 is amended by : a. R evising paragraph (a) introductory text; b. In paragraph (a)(4)(i), by removing “paragraph (a)(1)(i) through (iii)” and adding in its place “paragraphs (a)(1)(i) through (iii)”; c. In paragraph (a)(2), by removing “§§” and adding in its place “§”;315

d. In paragraph (a)(4)(ii), by adding after “paragraph (a)(4)(i)” the words “of this section”; e. In paragraph (a)(9)(i), by adding after “August 31 of” the word “the”; f. R evising paragraph (b) introductory te xt; g. In paragraph (b)(4)(ii), by adding after “paragraph (b)(4)(i)” the words “of this section”; h. In paragraph (b)(9)(i), by adding after “August 31 of” the word “the”; and i. In paragraph (b)(10)(ii), by adding after “§ 52.38(b)(4) or (5)” the word s “of this chapter”;
T o read as follows: § 97.512 CSAPR NO X Ozone Season allowance allocations to new units. (a) For each control period in 2015 and thereafter and for the CSAPR NO X Ozone Season units in each State for which a new

u nit set

- aside is set fo rth in § 97.510 for that control period, the Administrator will allocate CSAPR NO X Ozone Season allowances to the CSAPR NO X Ozone Season units as follows:
* * * * * (b) For each control period in 2015 and thereafter and for the CSAPR NO X Ozone Seaso n units located in Indian country within the borders of each State for which an Indian country new unit
set

- aside is set forth in §97.510 for that control period, the316

Administrator will allocate CSAPR NO X Ozone Season allowances to the CSAPR NO X Ozone Seas on units as follows:
* * * * * 40. Section 97.521 is amended by : a. In paragraph (b) in troductory text, by removing “§ 52.38(b)(3)(i) through ( iv)” and adding in its place “§ 52.38(b)(3)(i)(A) through (D)”;
b. R edesignating paragraph (c) as paragra ph (c)(1), and by revising the redesignated paragraph;

c. A dding a new paragraph (c)(2); d. R evising paragraphs (d) and (e); and
e. I n paragraph (j), by removing “the date” and adding in its place “the date 15 days after the date”;
T o read as follows: § 97.521 Recordation of CSAPR NO X Ozone Season allowance allocations and auction results.
* * * * * (c)(1) By December 1, 2016, the Administrator will record in each CSAPR NO X Ozone Season source's compliance account the
CSAPR NO X Ozone Season allowa nces allocated to the CSAPR NO X Ozone Season units at the source, or in each appropriate Allowance Management System account the CSAPR NO X Ozone Season allowances auctioned to CSAPR NO X Ozone Sea son units, in accordance with § 97.511(a), or with a SIP revision approved317

under § 52.38(b)(4) or (5) of this chapter, for the control period in 2017 or, for such sources in Georgia, the control periods in 2017 and 2018. (2) For the CSAPR NO X Ozone Season sources not in Georgia, by Decem ber 1, 2016, the Administrator will record in each such source’s compliance account the CSAPR NO X Ozone Season allowances allocated to the CSAPR NO X Ozone Season units at the source in accordance with § 97.511(a) for the control period in 2018, unless the S tate in which the source is located notifies the Administrator in writing by November 15, 2016 of the State's intent to submit to the Administrator a complete SIP revision by April 1, 201 7 meeting the requirements of § 52.38(b)(3)(ii)(A) through (D) of this chapter. (A) If the State does not submit to the Administrator by April 1, 2017 such complete SIP revision, the Administrator will record by April 15, 2017 in each CSAPR NO X Ozone Season source's compliance account the CSAPR NO X Ozone Season allowances allocated to the CSAPR NO X Ozone Season units at the source in accorda nce with § 97.511(a) for the control period in 2018. (B) If the State submits to the Administrator by April 1, 2017 and the Administrator approves by October 1, 2017 such complete SIP revision, the Administrator will record by October 1, 2017 in each CSAPR NO X Ozone Season source's compliance account the CSAPR NO X Ozone Season allowances allocated to the318

CSAPR NO X Ozone Season units at the source as provided in su ch approved, complete SIP revision for the control period in 2018. (C) If the State submits to the Administrator by April 1, 2017 and the Administrator does not approve by October 1, 2017 such complete SIP revision, the Administrator will record by Octobe r 1, 2017 in each CSAPR NO X Ozone Season source's compliance account the CSAPR NO X Ozone Season allowances allocated to the CSAPR NO X Ozone Season units at the source in accordance with §97.511(a) for the control period in 2018. (d) By July 1, 2018, the Ad ministrator will record in each
CSAPR NO X Ozone Season source's compliance account the CSAPR NO X Ozone Season allowances allocated to the CSAPR NO X Ozone Season units at the source, or in each appropriate Allowance Management System account the CSAPR NO X O zone Season allowances auctioned to
CSAPR NO X Ozone Sea son units, in accordance with § 97.511(a), or with a SIP revision approved under § 52.38(b)(4) or (5) of this chapter, for the control periods in 2019 and 2020. (e) By July 1, 2019, the Administrator wil l record in each
CSAPR NO X Ozone Season source's compliance account the CSAPR NO X Ozone Season allowances allocated to the CSAPR NO X Ozone Season units at the source, or in each appropriate Allowance Management System account the CSAPR NO X Ozone Season all owances auctioned to
CSAPR NO X Ozone Sea son units, in accordance with § 97.511(a), or319

with a SIP revision approved under § 52.38(b)(4) or (5) of this chapter, for the control periods in 2021 and 2022.
* * * * * 41. Section 97.524 is amended by :

a. R evising paragraphs (b) introductory text, (b)(1), (c)(2) introductory text, and (c)(2) (i) and (ii); b. A dding new paragraphs (c)(2)(iii) through (v);

c. R evising paragraph (d); and d. A dding a new paragraph (f);
T o read as follows: §97.524 Compliance with CSAPR NO X Ozone Season emissions limitation.
* * * * * (b) Deductions for compliance . After the recordation, in accordance with §97.523, of CSAPR NO X Ozone Season allowance transfers submitted by the allowance transfer deadline for a control p eriod in a given year, the Administrator will deduct from each source's compliance account CSAPR NO X Ozone Season allowances available under paragraph (a) of this section in order to determine whether the source meets the CSAPR NO X Ozone Season emissions l imitation for such control period, making all such deductions in whole CSAPR NO X Ozone Season allowances, as follows:320

(1) Until the tonnage equivalent of the CSAPR NO X Ozone Season allowances deducted equals or exceeds the number of tons of total NO X emiss ions from all CSAPR NO X Ozone Season units at the source for such control period; or
* * * * * (c) * * * (2) Default order of deductions . The Administrator will deduct CSAPR NO X Ozone Season allowances under paragraph (b) or (d) of this section from the source's compliance account in accordance with a complete request under paragraph (c)(1) of this section or, in the absence of such request or in the case of identification of an insufficient amount of CSAPR NO X Ozone Season allowances in such re quest, in the following order: (i) Any CSAPR NO X Ozone Season allowances determined under paragraph (f)(1) of this section to have a tonnage equivalent of one ton per allowance that were allocated or auctioned from the
NO X Ozone Season trading budget for the State within whose borders the source is located to the units at the source and were not transferred out of the compliance account, in the order of recordation; (ii) Any CSAPR NO X Ozone Season allowances determined under paragraph (f)(1) of this sect ion to have a tonnage equivalent of one ton per allowance that were not allocated or auctioned from the NO X Ozone Season trading budget for the State within whose321

borders the source is located to any unit at the source and were transferred to and recorded in the compliance account pursuant to this subpart, in the order of recordation; (iii) Any CSAPR NO X Ozone Season allowances determined under paragraph (f)(2) of this section to have a tonnage equivalent of four tenths of one ton per allowance, in the ord er of recordation; (iv) Any CSAPR NO X Ozone Season allowances determined under paragraph (f)(3) of this section to have a tonnage equivalent of one fourth of one ton per allowance that were allocated or auctioned from the NO X Ozone Season trading budget f or the State within whose borders the source is located to the units at the source and were not transferred out of the compliance account, in the order of recordation; and (v) Any CSAPR NO X Ozone Season allowances determined under paragraph (f)(3) of this section to have a tonnage equivalent of one fourth of one ton per allowance that were not allocated or auctioned from the NO X Ozone Season trading budget for the State within whose borders the source is located to any unit at the source and were transferr ed to and recorded in the compliance account pursuant to this subpart, in the order of recordation. (d) Deductions for excess emissions . After making the deductions for compliance under paragraph (b) of this section for a control period in a year in which the CSAPR NO X Ozone322

Season source has excess emissions, the Administrator will deduct from the source's compliance account CSAPR NO X Ozone Season allowances allocated for a control period in a prior year or the control period in the year of the excess emissions or in the immediately following year, making all such deductions in whole CSAPR NO X Ozone Season allowances, until the tonnage equivalent of the CSAPR NO X Ozone Season allowances deducted under this paragraph equals or exceeds two times the number of tons of the source's excess emissions.
* * * * * (f) Tonnage equivalents of CSAPR NO X Ozone Season allowances . Where a det ermination is needed of the tonnage equivalent of a CSAPR NO X Ozone Season allowance held or de ducted under any provision of § 97.5 06(c), §97.511(c), §97.524, §97.525, §97.527, or § 97.528 relating to the holding or deduction of
CSAPR NO X Ozone Season allowa nces, the Administrator will make the determination as follows, provided that notwithstanding any such determination the CSAPR NO X Ozone Season allowance remains subject to the limitations in § 97.506(c)(6): (1) Except as provided under paragraph (f)(2) or (f)(3) of this section, the tonnage equivalent of each CSAPR NO X Ozone Season allowance shall be one ton per allowance. (2) Where a CSAPR NO X Ozone Season allowance has been allocated or auctioned for a control period in 2017 or a323

subsequent year from th e NO X Ozone Season trading budget for Georgia, and where the CSAPR NO X Ozone Season allowance is held or deducted for any purpose related to emissions from a CSAPR NO X Ozone Season unit in another State (or Indian country within the borders of another Stat e) or for the purpose of correcting an allocation or recordation error affecting a CSAPR NO X Ozone Season unit in another State (or Indian country within the borders of another State), the tonnage equivalent of the CSAPR
NO X Ozone Season allowance shall be four tenths of one ton per allowance. (3) Where a CSAPR NO X Ozone Season allowance has been allocated or auctioned for a control period in 2015 or 2016, and where the CSAPR NO X Ozone Season allowance is held or deducted for any purpose related to emissio ns from a CSAPR NO X Ozone Season unit in any State except Georgia (or Indian country within the borders of such a State) in a control period in 2017 or a subsequent year or for the purpose of correcting an allocation or recordation error affecting a CSAPR NO X Ozone Season unit in any State except Georgia (or Indian country within the borders of such a State) for a control period in 2017 or a subsequent year, the tonnage equivalent of the CSAPR NO X Ozone Season allowance shall be one fourth of one ton per al lowance.324

(4) The Administrator will determine the year of the compliance period for which a CSAPR NO X Ozone Season allowance was allocated or auctioned and the State from whose NO X Ozone Season trading budget the CSAPR NO X Ozone Season allowance was alloc ated or auctioned based on the records maintained in the Allowance Management System. 42. Section 97.525 is amended by :

a. R evising paragraphs (b) introductory text and (b)(2)(ii); b. In paragraph (b)(2)(iii) introductory text, by removing “paragraph (b )(1)(i)” and adding in its place “paragraph (b)(1)(ii)”; c. In paragraph (b)(2)(iii)(B), by adding “the calculations incorporating” before “any adjustments”; and
d. R evising paragraphs (b)(4)(i) , (b)(5), (b)(6) introductory text, (b)(6)(i) and (ii), (b)( 6)(iii) introductory text, and (b)(6)(iii)(A) and (B) ;
T o read as follows: §97.525 Compliance with CSAPR NO X Ozone Season assurance provisions.
* * * * * (b) Deductions for compliance . The Administrator will deduct CSAPR NO X Ozone Season allowances available under paragraph (a) of this section for compliance with the CSAPR NO X325

Ozone Season assurance provisions for a State for a control period in a given year in accordance with the following procedures, making all such deductions in whole C SAPR NO X Ozone Season allowances:
* * * * * (2) * * * (ii) By August 1 immediately after the promulgation of such notice, the Administrator will calculate, for each such State (and Indian country within the borders of such State) and such
cont rol period and each common designated representative for such control period for a group of one or more CSAPR NO X Ozone Season sources and units in the State (and Indian country within the borders of such State), the common designated representative's shar e of the total NO X emissions from all CSAPR
NO X Ozone Season units at CSAPR NO X Ozone Season sources in the State (and Indian country within the borders of such State), the common designated representative's assurance level, and the tonnage equivalent (if any) of CSAPR NO X Ozone Season allowances that the owners and operators of such group of sources and units must hold in accordance wi th the calculation formula in § 97.506(c)(2)(i) and will promulgate a notice of data availability of the results of these ca lculations.
* * * * * (4) * * *326

(i) As of midnight of November 1 immediately after the promulgation of each notice of data availability required in paragraph (b)(2)(iii)(B) of this section, the owners and operators described in paragraph (b)(3 ) of this section shall hold in the assurance account established for them and for the appropriate CSAPR NO X Ozone Season sources, CSAPR NO X Ozone Season units, and State (and Indian country within the borders of such State) under paragraph (b)(3) of this section CSAPR NO X Ozone Season allowances, available for deduction under paragraph (a) of this section, with a total tonnage equivalent not less than the tonnage equivalent such owners and operators are required to hold with regard to such sources, units a nd State (and Indian country within the borders of such State) as calculated by the Administrator and referenced in such notice.
* * * * * (5) After November 1 (or the date described in paragraph (b)(4)(ii) of this section) immediately after the pr omulgation of each notice of data availability required in paragraph (b)(2)(iii)(B) of this section and after the re cordation, in accordance with § 97.523, of CSAPR NO X Ozone Season allowance transfers submitted by midnight of such date, the Administrator

w ill determine whether the owners and operators described in paragraph (b)(3) of this section hold, in the assurance account for the appropriate CSAPR NO X Ozone Season sources, CSAPR NO X327

Ozone Season units, and State (and Indian country within the borders o f such State) established under paragraph (b)(3) of this section, CSAPR NO X Ozone Season allowances available under paragraph (a) of this section with the tonnage equivalent that the owners and operators are required to hold with regard to such sources, un its, and State (and Indian country within the borders of such State) as calculated by the Administrator and referenced in the notice required in paragraph (b)(2)(iii)(B) of this section. (6) Notwithstanding any other provision of this subpart and any revis ion, made by or submitted to the Administrator after the promulgation of the notice of data availability required in paragraph (b)(2)(iii)(B) of this section for a control period in a given year, of any data used in making the calculations referenced in su ch notice, the tonnage equivalents of CSAPR NO X Ozone Season allowances that the owners and operators are requir ed to hold in accordance with § 97.506(c)(2)(i) for such control period shall continue to be such tonnage equivalents as calculated by the Administrator and referenced in such notice required in paragraph (b)(2)(iii)(B) of this section, except as follows: (i) If any such data are revised by the Administrator as a result of a decision in or settlement of litigation concerning such data on appe al under part 78 of this chapter of such328

notice, or on appeal under section 307 of the Clean Air Act of a decision rendered under part 78 of this chapter on appeal of such notice, then the Administrator will use the data as so revised to recalculate the to nnage equivalents of CSAPR NO X Ozone Season allowances that owners and operators are required to hold in accordance with the calculation formula in §97.506(c)(2)(i) for such control period with regard to the CSAPR NO X Ozone Season sources, CSAPR NO X Ozone Season units, and State (and Indian country within the borders of such State) involved, provided that such litigation under part 78 of this chapter, or the proceeding under part 78 of this chapter that resulted in the decision appealed in such litigation u nder section 307 of the Clean Air Act, was initiated no later than 30 days after promulgation of such notice required in paragraph (b)(2)(iii)(B) of this section. (ii) If any such data are revised by the owners and operators of a CSAPR NO X Ozone Season sou rce and CSAPR NO X Ozone Season unit whose designated representative submitted such data under paragraph (b)(2)(i) of this section, as a result of a decision in or settlement of litigation concerning such submission, then the Administrator will use the data as so revised to recalculate the tonnage equivalents of CSAPR NO X Ozone Season allowances that owners and operators are required to hold in accordance wi th the calculation formula in § 97.506(c)(2)(i)329

for such control period with regard to the CSAPR NO X Oz one Season sources, CSAPR NO X Ozone Season units, and State (and Indian country within the borders of such State) involved, provided that such litigation was initiated no later than 30 days after promulgation of such notice required in paragraph (b)(2)(iii )(B) of this section. (iii) If the revised data are used to recalculate, in accordance with paragraphs (b)(6)(i) and (ii) of this section, the tonnage equivalent of CSAPR NO X Ozone Season allowances that the owners and operators are required to hold for su ch control period with regard to the CSAPR NO X Ozone Season sources, CSAPR
NO X Ozone Season units, and State (and Indian country within the borders of such State) involved

— (A) Where the tonnage equivalent of CSAPR NO X Ozone Season allowances that the owne rs and operators are required to hold increases as a result of the use of all such revised data, the Administrator will establish a new, reasonable deadline on which the owners and operators shall hold CSAPR NO X Ozone Season allowances with the additional tonnage equivalent in the assurance account established by the Administrator for the appropriate CSAPR NO X Ozone Season sources, CSAPR NO X Ozone Season units, and State (and Indian country within the borders of such State) under paragraph (b)(3) of this se ction. The owners' and operators' failure to hold such additional tonnage330

equivalent, as required, before the new deadline shall not be a violation of the Clean Air Act. The owners' and operators' failure to hold such additional tonnage equivalent, as requ ired, as of the new deadline shall be a violation of the Clean Air Act. Each ton of the tonnage equivalent of CSAPR NO X Ozone Season allowances that the owners and operators fail to hold as required as of the new deadline, and each day in such control peri od, shall be a separate violation of the Clean Air Act. (B) For the owners and operators for which the tonnage equivalent of CSAPR NO X Ozone Season allowances required to be held decreases as a result of the use of all such revised data, the Administrator will record, in all accounts from which CSAPR
NO X Ozone Season allowances were transferred by such owners and operators for such control period to the assurance account established by the Administrator for the appropriate CSAPR NO X Ozone Season sources, CS APR NO X Ozone Season units, and State (and Indian country within the borders of such State) under paragraph (b)(3) of this section, a total amount of the CSAPR NO X Ozone Season allowances held in such assurance account that the Administrator determines may be transferred from such assurance account without causing the tonnage equivalent of the CSAPR NO X Ozone Season allowances held by such owners and operators in such assurance account to fall below the tonnage equivalent required to be held by such owners and operators in such331

assurance account, making any transfers in whole CSAPR NO X Ozone Season allowances. If CSAPR NO X Ozone Season allowances were transferred to such assurance account from more than one account, the tonnage equivalent of CSAPR NO X Ozone Season allowances recorded in each such transferor account will be in proportion to the percentage of the total tonnage equivalent of
CSAPR NO X Ozone Season allowances transferred to such assurance account for such control period from such transferor accou nt. * * * * * §97.528 [Amended] 43. Section 97.528 is amended in paragraph (b) by removing “paragraph (a)(1)” and adding in its place “paragraph (a)”. 44. Section 97.530 is amended by :

a. R evising paragraphs (b) introductory text and (b) (1) through (3); b. In paragraph (b)(4) introductory text, by removing “§§” and adding in its place “§”; and c. In paragraph (b)(4)(iii), by adding after “§ 75.66” the words “of this chapter”;
T o read as follows: § 97.530 General monitoring, recordkeeping, and reporting requirements.
* * * * *332

(b) Compliance deadlines . Except as provided in paragraph (e) of this section, the owner or operator of a CSAPR NO X Ozone Season unit shall meet the monitoring system certification and other requirements of pa ragraphs (a)(1) and (2) of this section on or before the latest of the following dates and shall record, report, and quality

- assure the data from the monitoring systems under paragraph (a)(1) of this section on and after the latest of the following dates: (1)(i) For a unit other than a unit described in paragraph (b)(1)(ii) of this section, May 1, 2015; or (ii) For a unit in the State of Kansas (or Indian country within the borders of the State) that is not a CSAPR NO X Ozone Season unit in another State (o r Indian country within the borders of another State) during any portion of a control period in 2015 or 2016, May 1, 2017; (2) 180 calendar days after the date on which the unit commences commercial operation; or (3) Where data for the unit is reported on a control period basis under § 97.534(d)(2)(ii)(B), and where the compliance date under paragraph (b)(2) of this section is not in a month from May through September, May 1 immediately after the compliance date under paragraph (b)(2) of this section.
* * * * * § 97.531 [Amended]333

45. Section 97.531 is amended by : a. In paragraph (d)(3) introductory text, by removing “§§” and adding in its place “§”; and
b. R edesignating paragraphs (d)(3)(v)(A)(1) through (5) as paragraphs (d)(3)(v)(A)( 1 ) through ( 5 )
. 46. Section 97.534 is amended by : a. In paragraph (b), by adding “the” before “requirements”;
b. R evising paragraphs (d)(1) and (2);

c. R edesignating paragraph (d)(6) as paragraph (d)(5)(ii); and d. In paragraph (e)(3), by removing “paragraph (d)(2 )(ii)” and adding in its place “paragraph (d)(2)(ii)(B)” ;
T o read as follows: §97.534 Recordkeeping and reporting.
* * * * * (d) * * * (1) The designated representative shall report the NO X mass emissions data and heat input data for a CSAPR NO X Ozone Season unit, in an electronic quarterly report in a format prescribed by the Administrator, for each calendar quarter indicated under paragraph (d)(2) of this section beginning with the latest of: (i)(A) For a unit other than a unit described in pa ragraph (d)(1)(i)(B) of this section, the calendar quarter covering May 1, 2015 through June 30, 2015; or334

(B) For a unit in the State of Kansas (or Indian country within the borders of the State) that is not a CSAPR NO X Ozone Season unit in another State (or Indian country within the borders of another State) during any portion of a control period in 2015 or 2016, the calendar quarter covering May 1, 2017 through June 30, 2017; (ii) The calendar quarter corresponding to the earlier of the date of provision al certification or the applicable deadline for initial certification under §97.530(b); or (iii) For a unit that reports on a control period basis under paragraph (d)(2)(ii)(B) of this section, if the calendar quarter under paragraph (d)(1)(ii) of this sec tion does not include a month from May through September, the calendar quarter covering May 1 through June 30 immediately after the calendar quarter under paragraph (d)(1)(ii) of this section. (2)(i) If a CSAPR NO X Ozone Season unit is subject to the Acid Rain Program or a CSAPR NO X Annual emissions limitation or if the owner or operator of such unit chooses to report on an annual basis under this subpart, then the designated representative shall meet the requirements of subpart H of part 75 of this chapter (concerning monitoring of NO X mass emissions) for such unit for the entire year and report the NO X mass emissions data and heat input data for such unit for the entire
year.335

(ii) If a CSAPR NO X Ozone Season unit is not subject to the Acid Rain Program or a CSAPR NO X Annual emissions limitation, then the designated representative shall either: (A) Meet the requirements of subpart H of part 75 of this chapter for such unit for the entire year and report the NO X mass emissions data and heat input data for such unit for the entire year in accordance with paragraph (d)(2)(i) of this section; or (B) Meet the requirements of subpart H of part 75 of this chapter ( including the requirements in § 75.74(c) o f this chapter) for such unit for the control period and report the NO X mass emissions data and heat input data (in cluding the data described in § 75.74(c)(6) of this chapter) for such unit only for the control period of each year.
* * * * * Subpar t CCCCC — CSAPR SO 2 Group 1 Trading Program 47. The heading of subpart CCCCC of part 97 is revised to read as set forth above. § 97.602 [Amended] 48. Section 97.602 is amended by :

a. R elocating all definitions beginning with “ CSAPR ” to their alphabetical lo cations in the list of definitions; b. In the definition of “ Cogeneration system ”, by removing “steam turbine generator” and adding in its place “generator”;336

c. In the definition of “ Commence commercial operation ”, in paragraph (2) introductory text, by adding after “defined in” the word “the”; d. In the definition of “ Fossil fuel ”, by removing “§§” and adding in its place §”; and e. In the definition of “ Sequential use of energy ”, in paragraph (2), by adding after “from” the word “a”. §97.604 [Amended] 49. Section 97.604 is amended in paragraph (b)(2)(ii) by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(2)(i)”. §97.606 [Amended] 50. Section 97.606 is amended by : a. In the heading of paragraph (c)(4), by adding “CSAPR SO 2 Group 1” before “allowances”; and b. In paragraph (d)(2), by removing “subpart H” and adding in its place “subpart B”. §97.610 State SO 2 Group 1 trading budgets, new unit set - asides, Indian country new unit set - asides, and variability limits. 51. Section 97.610 is amended by :

a. R evising the heading as set forth above; b. R emoving “SO 2 trading budget” wherever it appears and adding in its place “SO 2 Group 1 trading budget”;337

c. R emoving “SO 2 new unit set

- aside” wherever it appears and adding in its place “new unit set

- aside”; d. R emoving “SO 2 Indian country new unit set

- aside” wherever it appears and adding in its place “Indian country new unit set

aside”;

e. R emoving “SO 2 variability limit ” wherever it appears and adding in its place “variability limit”; f. In paragraph (a) introductory text, by adding “Group 1” before “trading budgets”, and by removing “new unit

- set aside” and adding in its place “new unit set

- aside”;
g. A dding and reser ving paragraphs (a)(2)(vi) and (a)(11)(vi); and h. In paragraph (c), by adding after “Each” the word “State”, and by removing “set aside” wherever it appears and adding in its place “set

- aside”. § 97.611 [Amended] 52. Section 97.611 is amended by : a. In paragraphs (b)(1)(iii) and (b)(2)(iii), by adding after “November 30 of” the word “the”; b. In paragraph (c)(1)(ii), by removing “§ 52.39(d), (e), or (f)” and adding in its place “§ 52.39(e) or (f)”; c. In paragraph (c)(5)(i)(B), by adding after “§ 52.39 (e) or (f)” the words “of this chapter”;338

d. In paragraph (c)(5)(ii) introductory text, by removing “of this paragraph” and adding in its place “of this section”; e. In paragraph (c)(5)(ii)(B), by adding after “§ 52.39(e) or (f)” the words “of this chapt er”; and f. In paragraph (c)(5)(iii), by removing “of this paragraph” and adding in its place “of this section”. § 97.612 [Amended] 53. Section 97.612 is amended by : a. In paragraph (a)(2), by removing “§§” and adding in its place “§”; b. In paragraph ( a)(4)(i), by removing “paragraph (a)(1)(i) through (iii)” and adding in its place “paragraphs (a)(1)(i) through (iii)”; c. In paragraph (a)(4)(ii), by adding after “paragraph (a)(4)(i)” the words “of this section”; d. In paragraph (a)(9)(i), by adding af ter “November 30 of” the word “the”; e. In paragraph (b)(4)(ii), by adding after “paragraph (b)(4)(i)” the words “of this section”; f. In paragraph (b)(9)(i), by adding after “November 30 of” the word “the”; g. In paragraph (b)(10)(ii), by removing “§ 5 2.39(d), (e), or (f)” and by adding in its place “§ 52.39(e) or (f)”; and339

h. In paragraph (b)(11), by adding after “paragraphs (b)(9), (10) and (12)” the words “of this section”. § 97.621 [Amended] 54. Section 97.621 is amended by : a. In paragraphs (c), (d), and (e), by removing “period” and adding in its place “periods”’; b. In paragraphs (f) and (g), by removing “§ 52.39(e) and (f)” and adding in its place “§ 52.39(e) or (f)”; and c. In paragraph (j), by removing “the date” and adding in its place “th e date 15 days after the date”. §97.625 [Amended] 55. Section 97.625 is amended by : a. In paragraph (b)(2)(iii) introductory text, by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(1)(ii)”; and b. In paragraph (b)(2)(iii)(B), by a dding “the calculations incorporating” before “any adjustments”. §97.628 [Amended] 56. Section 97.628 is amended in paragraph (b) by removing “paragraph (a)(1)” and adding in its place “paragraph (a)”. §97.630 [Amended] 57. Section 97.630 is amended by : a. In paragraph (b) introductory text, by adding after “operator” the words “of a CSAPR SO 2 Group 1 unit”, by adding340

“the later of” before “the following dates” each time it appears, and by removing the final period and adding in its place a colon; b. R emo ving paragraphs (b)(1) and (b)(2) introductory text;

c. R edesignating paragraphs (b)(2)(i) and (ii) as paragraphs (b)(1) and (2); d. In redesignated paragraph (b)(2), by removing the final semicolon and adding in its place a period; e. In paragraph (b)(3) introductory text , by removing “§§” and adding in its place “§”; and f. In paragraph (b)(3)(iii), by adding after “§ 75.66” the words “of this chapter”. §97.631 [Amended] 58. Section 97.631 is amended by : a. In paragraph (d)(3) introductory text, by remov ing “§§” and adding in its place “§”; and
b. R edesignating paragraphs (d)(3)(v)(A)(1) through (3) as paragraphs (d)(3)(v)(A)( 1 ) through ( 3 ). §97.634 [Amended] 59. Section 97.634 is amended by : a. In paragraph (b) by adding “the” before “requirements”;
b. In paragraph (d)(1) introductory text, by removing “the CSAPR” and adding in its place “a CSAPR”, and by adding “the later of” before the final colon;341

c. In paragraph (d)(1)(i), by removing “For a unit that commences commercial operation before July 1, 201 4, the” and adding in its place “The”; and d. In paragraph (d)(1)(ii), by removing “For a unit that commences commercial operation on or after July 1, 2014, the” and adding in its place “The”, and by removing “, unless that quarter is the third or fourth quarter of 2014, in which case reporting shall commence in the quarter covering January 1, 2015 through March 31, 2015”. Subpart DDDDD — CSAPR SO 2 Group 2 Trading Program 60. The heading of subpart DDDDD of part 97 is revised to read as set forth above. §97. 702 [Amended] 61. Section 97.702 is amended by :

a. R elocating all definitions beginning with “ CSAPR ” to their alphabetical locations in the list of definitions; b. In the definition of “ Cogeneration system ”, by removing “steam turbine generator” and add ing in its place “generator”; c. In the definition of “ Commence commercial operation ”, in paragraph (2) introductory text, by adding after “defined in” the word “the”; d. In the definition of “ Fossil fuel ”, by removing “§§” and adding in its place §”; an d342

e. In the definition of “ Sequential use of energy ”, in paragraph (2), by adding after “from” the word “a”. § 97.704 [Amended] 62. Section 97.704 is amended in paragraph (b)(2)(ii) by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)( 2)(i)”. § 97.706 [Amended] 63. Section 97.706 is amended by : a. In the heading of paragraph (c)(4), by adding “CSAPR SO 2 Group 2” before “allowances”; and b. In paragraph (d)(2), by removing “subpart H” and adding in its place “subpart B”. §97.710 Stat e SO 2 Group 2 trading budgets, new unit set - asides, Indian country new unit set - asides, and variability limits. 64. Section 97.710 is amended by :

a. R evising the heading as set forth above; b. R emoving “SO 2 trading budget” wherever it appears and adding in its place “SO 2 Group 2 trading budget”;

c. R emoving “SO 2 new unit set

- aside” wherever it appears and adding in its place “new unit set

- aside”; d. R emoving “SO 2 Indian country new unit set

- aside” wherever it appears and adding in its place “Indian country new unit set

aside”;343

e. R emoving “SO 2 variability limit” wherever it appears and adding in its place “variability limit”; f. In paragraph (a) introductory tex t, by adding “Group 2” before “trading budgets”, and by removing “new unit

- set aside” and adding in its place “new unit set

- aside”; and g. In paragraph (c), by adding after “Each” the word “State”, by removing “identified under” and adding in its place “i n”, by removing “excludes” and adding in its place “does not include”, and by removing “set aside” wherever it appears and adding in its place “set

- aside”. § 97.711 [Amended] 65. Section 97.711 is amended by : a. In paragraphs (b)(1)(iii) and (b)(2)(iii), by adding after “November 30 of” the word “the”; b. In paragraph (c)(1) introductory text, by adding after “approved” each time it appears the word “under”; c. In paragraph (c)(1)(ii), by removing “§ 52.39(g), (h), or (i)” and adding in its place “§ 52.3 9(h) or (i)”; d. In paragraph (c)(5)(i)(B), by adding after “§ 52.39(h) or (i)” the words “of this chapter”; e. In paragraph (c)(5)(ii) introductory text, by removing “of this paragraph” and adding in its place “of this section”; f. In paragraph (c)(5)( ii)(B), by adding after “§ 52.39(h) or (i)” the words “of this chapter”; and344

g. In paragraph (c)(5)(iii), by removing “of this paragraph” and adding in its place “of this section”. § 97.712 [Amended] 66. Section 97.712 is amended by : a. In paragraph (a)( 2), by removing “§§” and adding in its place “§”; b. In paragraph (a)(4)(i), by removing “paragraph (a)(1)(i) through (iii)” and adding in its place “paragraphs (a)(1)(i) through (iii)”; c. In paragraph (a)(4)(ii), by adding after “paragraph (a)(4)(i)” t he words “of this section”; d. In paragraph (a)(9)(i), by adding after “November 30 of” the word “the”; e. In paragraph (b)(4)(ii), by adding after “paragraph (b)(4)(i)” the words “of this section”; f. In paragraph (b)(9)(i), by adding after “November 3 0 of” the word “the”; and g. In paragraph (b)(10)(ii), by removing “§ 52.39(g), (h), or (i)” and by adding in its place “§ 52.39(h) or (i)”. § 97.721 [Amended] 67. Section 97.721 is amended by : a. In paragraphs (c), (d), and (e), by removing “period” and adding in its place “periods”’;345

b. In paragraphs (f) and (g), by removing “§ 52.39(h) and (i)” and adding in its place “§ 52.39(h) or (i)”; and c. In paragraph (j), by removing “the date” and adding in its place “the date 15 days after the date”, and by removing the comma before “described”. § 97.725 [Amended] 68. Section 97.725 is amended by : a. In paragraph (b)(2)(iii) introductory text, by removing “paragraph (b)(1)(i)” and adding in its place “paragraph (b)(1)(ii)”; b. In paragraph (b)(2)(iii)(B), by adding “the calculations incorporating” before “any adjustments”; and c. In paragraph (b)(6)(iii)(B), by removing after “appropriate” the word “at”. § 97.728 [Amended] 69. Section 97.728 is amended in paragraph (b) by removing “paragraph (a)(1)” and adding in its place “paragraph (a)”. § 97.730 [Amended] 70. Section 97.730 is amended by : a. In paragraph (b) introductory text, by adding after “operator” the words “of a CSAPR SO 2 Group 2 unit”, by adding “the later of” before “the following dates” each time it appears, and by removing the final period and adding in its place a colon;346

b. R emoving paragraphs (b)(1) and (b)(2) introductory text;
c. R edesignating paragraphs (b)(2)(i) and (ii) as paragraphs (b)(1) and (2); d. In redesignated paragraph (b)(2), by removing the final semicolon and adding in its place a period; e. In paragraph (b)(3) introductory text , by removing “§§” and adding in its place “§”; and f. In paragraph (b)(3)(iii), by adding after “§75.66” the words “of this chapter”. § 97.731 [Amend ed] 71. Section 97.731 is amended by : a. In paragraph (d)(3) introductory text, by removing “§§” and adding in its place “§”; and b. R edesignating paragraphs (d)(3)(v)(A)(1) through (3) as paragraphs (d)(3)(v)(A)( 1 ) through ( 3 ). § 97.734 [Amended] 72. Sec tion 97.734 is amended by : a. In paragraph (b) by adding “the” before “requirements”; b. In paragraph (d)(1) introductory text, by removing “the CSAPR” and adding in its place “a CSAPR”, and by adding “the later of” before the final colon; c. In paragraph (d)(1)(i), by removing “For a unit that commences commercial operation before July 1, 2014, the” and adding in its place “The”; and347

d. In paragraph (d)(1)(ii), by removing “For a unit that commences commercial operation on or after July 1, 2014, the” and a dding in its place “The”, and by removing “, unless that quarter is the third or fourth quarter of 2014, in which case reporting shall commence in the quarter covering January 1, 2015 through March 31, 2015”.