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Page 1 of 223 **6560 -**  **50 -**  **P ENVIRONMENTAL PROTECTION AGENCY**  **40 CFR Parts 50, 51, 52,**  **70 and 71 [EPA**  **- HQ**  **- OAR** **- 2010**  **- 0885, FRL**  **- 9917**  **- 29**  **- OAR**  **]**

**RIN 2060 -**  **AR34 Implementation of the 2008 National Ambient Air Quality Standards for Ozone:** 

**State Implementation Plan Requirements AGENCY:**  Environmental Protection Agency (EPA). **ACTION:** Final rule. **SUMMARY:** The U.S. Environmental Protection Agency ( EPA ) is establishing a final rule for implementing the 2008 ozone national ambient air quality standards (NAAQS) (the “2008 ozone NAAQS”) that were promulgated on March 12, 2008. This final rule addresses a range of nonattainment area state implementation plan (SIP) requireme nts for the 2008 ozone NAAQS, including requirements pertaining to attainment demonstrations, reasonable further progress (RFP), reasonabl y available control technology (RACT), reasonabl y available control measures (RACM), major new source review (NSR),
em ission inventories, and the timing of SI P submissions and of compliance with emission control measures in the SIP. Other issues also addressed in this final rule are the revocation of the 1997 ozone NAAQS and anti
- backsliding requirements that apply when the 1997 ozone NAAQS is revoked. If the primary or secondary ozone NAAQS are revised in the future, the EPA expects that this rule will help facilitate implementation of any new standards. **DATES:** This final rule is effective on **[INSERT DATE 30**  **DAYS FROM DATE OF PUBLICATION**  **IN THE FEDERAL REGISTER ]**  **.***** E.O. 12866 Review

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Page 2 of 223 **ADDRESSES:** The EPA has established a docket for this action under Docket ID No. EPA
- HQ
- OAR
- 2011
- 0885. All documents in the docket are listed in http:// www.regulations.gov . Although listed in the inde x, some information is not publicly available, i.e. , confidential business information (CBI) or other information whose disclosure is restricted b y statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be pub licly available only

in hard copy form. Publicly

available docket materials are available either electronically in http:// www.regulations.gov or in hard cop y at the EPA Docket Center, Room Number 3334 in the EPA William Jefferson Clinton West Building, loc ated at 1301 Constitution Ave nue , NW, Washington, D.C. 20004. The Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through Friday , excluding legal holiday s. The telephone number for the Public Reading Room is (202) 566
- 1744 , and the telephon e number for the Air Docket is (202) 566
- 1742
. **FOR FURTHER INFORMATION CONTACT** : For further general information on this rulemaking, contact Dr. Karl Pepple, Office of Air Qualit y Planning and Standards, U.S. Environmental Protection Agency , by phone at ( 206 ) 553
- 1778 , or b y email at pepple.karl@epa.gov ; or Mr. Butch Stackhouse, Office of Air Qualit y Planning and Standards, U.S. Environmental Protection Agency, phone number (919) 54l
- 5208, or by email at stackhouse.butch@epa.gov
. **SUPPLEMENTARY INFORMATION: I. General Information**  A. Does this action apply to me?*** E.O. 12866 Review

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Page 3 of 223 Entities potentially

affected directl y b y this final rule include state, local and tribal governments. Entities potentially affected indirectly

by this final rule include owners and ope rators of sources of emissions [ volatile organic compounds (VOCs) and nitrogen oxides (NO x )] that contribute to ground
- level ozone formation. B. W here can I get a copy o

f this document and other related information? In addition to being available in the docket, an electronic cop y of this notice will be posted at http://www.epa.gov/air/ozonepollu tion/actions.html#impl under “recent actions.” C. How is this notice organized? The information presented in this notice is organized as follows: I. General Information A. Does this action appl y to me? B. Where can I get a cop y of this document and other relate d information? C. How is this notice organized? II. Background III. What are the state implementation plan requirements for the 2008 ozone NAAQS? A. What is the deadline for submitting nonattainment area SIP revisions for the 2008 ozone NAAQS? B. What are the requirements for modeling and attainment demonstration SIPs? C. What are the RFP requirements for the 2008 ozone NAAQS? D. How do RACT and RACM requirements appl y for 2008 ozone NAAQS nonattainment areas? E. Does the 2008 ozone NAAQS result in any new vehicle I/M programs? F. How does transportation conformity appl y to the 2008 ozone NAAQS? G. What requirements for general conformit y appl y t o the 2008 ozone NAAQS? H. What are the requirements for contingency measures in the event of failure to meet a m ilestone or to attain? I. How do the NSR requirements apply for the 2008 ozone NAAQS? J. What are the emission inventory and emission statement requirements? K. What are the ambient monitoring requirements? L. How can an area qualify for a 1
- ye ar attainment deadline extension? M. How will the EPA identify rural transport areas ? N. What are the special requirements for multi
- state nonattainment areas? O. How will the EPA address interstate and international ozone transport? P
. How will the section 182(f) NO x provisions be handled?*** E.O. 12866 Review

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Page 4 of 223 Q
. Emissions R eduction B enefits of E nergy E fficiency /R enewable E nergy P olicies and P rograms, L and U se P lanning and T ravel E fficiency R
. Efforts to E ncourage a M ulti
- pollutant Approach W hen D eveloping 2008 O zone SIPs S. What are the requirements for the Ozone Transport Region ( OTR) ? T. Are there an y additional requirements related to enforcement and compliance ? U. What are the requirements for addressing emergency episodes? V. How does the “Clean Data Policy” appl y to the 2008 ozone NAAQS? W
. How does this final rule apply to tribes? X
. What collaborative program ha s the EPA implement ed for the 2008 ozone NAAQS? IV
. What are the anti
- backsliding requirements for the revoked 1997 ozone NAAQS? A. What is the effective date of the revocation of the 1997 ozone NAAQS? B
. What are the applicable requirements for anti
- backsliding purposes following the revocation of the 1997 ozone NAAQS? C
. Application of T ransition R equirements to N onattainment and Attainment Areas D
. Satisfaction of Anti
- backsliding R equirements for an Area E
. How will the EPA’s determination of attainment (“Clean Data”) regulation apply for purposes of the anti
- backsliding requirements? F
. What is the relationship between implementation of the 2008 ozone NAAQS and the CAA title V permits program? V. Statutory

and Executive Order Reviews A. Executive Order 12866: Regulatory Planning and Review and Executive Order 13563: Imp roving Regulation and Regulatory Review B. Paperwork Reduction Act C. Regulatory

Flexibility

Act D. Unfunded Mandates Reform Act 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 and Safet y Risks H. Executive Order 13211: Actions Concerning Regulations That Significantly Affect Energy

Suppl y, Distribution, or Use. I. National Technology

Transfer and Advanceme nt Act J. Executive Order 12898: Federal Actions to Address Environmental Justice in Minority Populations and L ow - Income Populations K. Congressional Review Act L
. Determination under Section 307(d) M. Judicial Review Appendix A to Preamble

— Glossary of Terms and Acron ym s Appendix B to Preamble

— Li st of Areas Nonattainment for the 2008 Ozone NAAQS in Addition to a Prior Ozone NAAQS Statutory Authorit y L ist of Subjects*** E.O. 12866 Review

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Page 5 of 223 **II. Background** On March 12, 2008, 1 the EPA ann ounced revisions to the primary and secondary NAAQS for ozone to a level of 0.075 parts per million (ppm) (annual fourth
- highest daily maximum 8
- hour concentration, averaged over 3 years). 2 Since the 2008 primary and secondary NAAQS for ozone are identical , for convenience, we refer to both as "the 2008 ozone NAAQS" or "the 2008 ozone standard s ." The 2008 ozone NAAQS retains the same general form and averaging time as the 0.08 ppm NAAQS set in 1997 , but is set at a more stringent level.
When the EPA revises a NAAQS for a particular criteria pollutant, it considers the extent to which existing EPA regulations and guidance are sufficient to implement the standard and whether any revisions or updates to those regulations and guidance would be helpful or appropriate in facilitating the implementation of the revised standard b y states, tribes, and local agencies. The CAA does not require that the EPA promulgate new implementing regulations every time that a NAAQS is revised. L ikewise, the CAA does not require the issuance of additional implementing regulations or guidance by the EPA bef ore a revised NAAQS becomes effective. The plain language of the CAA and existing EPA regulations may

be sufficient in many

cases to enable the EPA and the states to begin working together to implement a revised NAAQS. However, where the nature of revision s to a NAAQS indicate that additional regulations or guidance (or revisions to

1 See 73 FR 16436
. 2 For a detailed explanation of the calculation of the 3
- year 8
- hour average, see 40 CFR part 50, Appendix I
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Page 6 of 223 existing regulations or guidance) may be helpful, or even necessary (e.g. to implement unique aspects of the revised standard), the EPA endeavors to provide those regulations
an d guidance to facilitate preparation of SIPs. It is important to note, however, that the existing EPA regulations in 40 CFR part 51 applicable to SIPs generall y and to particular pollutants continue to apply even without such updates. This rule revises exi sting regulations and guidance as necessary and appropriate to aid in the implementation of the 2008 ozone NAAQS. Promulgation of a NAAQS triggers a requirement for the EPA to designate areas as nonattainment, attainment, or unclassifiable, and to classify the areas at the time of designation. The EPA has alread y completed area designations and associated classifications for the 2008 NAAQS, and they were effective July

20, 2012 (May

21, 2012; 77 FR 30088). The EPA also undertook notice and comment rulemaki ng on the Clean Air Act’s (CAA or Act) nonattainment area provisions for the 2008 ozone NAAQS, which is complete with this final rule
. The public comment period on the notice of proposed rulemaking (NPRM ) for the SIP Requirements Rule ran fr om June 6, 2013 , to September 4, 2013. The EPA received 54 comment submissions on the NPRM. The preamble to this final rule discusses the comments received and how they were considered by

the EPA in general terms. The Response to Comments document provides more detailed responses to the comments received. The public comments received on the NPRM and the EPA’s Response to Comment document are posted in the docket at www.regulations.gov (Docket ID No. EPA
- HQ
- OAR
- 2011
- 0885)
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Page 7 of 223 We are taking multiple actions in this rule pertaining to submittal deadlines and specific CAA requirements for the content of SIPs for the 2008 ozone NAAQS. As a general matter, this final rule follows the same basic principles and approach that the EPA a pplied to interpreting the CAA ’s p art D, s ubpart 2 ozone nonattainment area requirements in the EPA’s development of the implementation rules for the 1997 ozone NAAQS. 4 Additionally , we are revoking the 1997 ozone NAAQS for all purposes and establishing anti
- backsliding requirements for areas that remain designated nonattainment for the revoked NAAQS
. Regarding the format of the following sections of this preamble , on topics where we proposed an action, we include detailed information about what we proposed , what we are finalizing and our rationale , as well as response s to significant comments. With topics where we did not propose an y action , we provid e guidance on that topic in the preamble . For a comprehensive look at all comments received and responses to those comments, please refer to the Response to Comment document in the docket. **III. What are the state implementation plan requirements for the 2008 ozone NAAQS?**  A. W hat is the deadline for submitting nonattainment area SIP revisions for the 2008
ozone NAAQS? 1. Summary of the Proposal For purposes of the 2008 ozone NAAQS, the EPA proposed two alternatives regarding the deadlines for submitting the various elements of an ozone nonattainment

4 See the Phase 1 (69 FR 23951, April 30, 2004) and Phase 2 (7 0 FR 71612, November 29, 2005) R

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Page 8 of 223 area state implementation plan, including emission inventor ies , RACT SIPs and emission statement SIPs , Ozone Transport Region (OTR) RACT , 15 percent r ate - of
- p rogress (ROP) plans and Moderate area attainment demonstrations , and the 3 percent per y ear RFP plans and attainment demonstrations for Serious and higher areas. The two proposed alternatives for SIP due dates were 1) the period of time provided by CAA section 182, and 2) a state’s choice of either submitting all elements in accordance with the timeframe provided b y section 182 or submitting all elements under a c onsolidated approach, no later than 30 months after the effective date of designation. The consolidated SIP approach would provide more time for some SIPs, and less time for others. The EPA also proposed a timeframe, for Serious and higher areas, of 4 ye ars for states to develop their attainment demonstration s and 3 percent per ye ar RFP plans. This was a proposed change from the approach used in the implementation of the 1997 ozone NAAQS, but is consistent with the timeframe allowed under section 182. Addi tionally , the EPA requested comment on its proposal to align the due date of the vehicle inspection and maintenance (I/M) program SIP with the due date of the attainment demonstration SIP so that both are due at the same time. This was similarly a proposed change from the current I/M SI P deadline for ozone nonattainment areas ( 1 y ear after the effective date of designation and classification under a revised ozone standard)
. We proposed that states with areas initially classified as Severe or Extr eme for the 2008 ozone NAAQS would be required to submit a CAA section 185 SI P no later than 10 ye ars after the effective date of designation and classification for the 2008 ozone NAAQS.*** E.O. 12866 Review

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Page 9 of 223 Finally , the EPA proposed that all SIP due date timeframes would run from the effective date of nonattainment designations for the 2008 ozone NAAQS. 2. Final Action We are finalizing the approach that the SIP elements listed in the proposal are due based on the timeframes provided in section 182. That is, states with area s designated nonattainment have 2 ye ars from the effective date of nonattainment designation 5 to submit emission inventories (required b y section 182 (a)(1)), RACT SIPs ( section 182(b)(2) ) and emission statement SIPs 6 (section 182(a)(3)(B)); 3 ye ars to subm it 15 percent ROP plans (section 182(b)(1)) and Moderate area attainment demonstrations (section 182(b)(1)); and 4 y ears to submit 3 percent per y ear 7 RFP plans (section 182(c)(2)) and attainment demonstrations (section 182(c)(2)) for Serious and higher
ar eas. This approach conforms to the manner in which the 1997 ozone NAAQS was implemented, with the exception of the 4 th year provided to areas classified Serious and higher to develop attainment demonstration SIPs for the 2008 ozone NAAQS. Additionally , we note that OTR states that owe SIPs due to section 184 must meet the
same SIP due dates listed previously
. The EPA is also finalizing the alignment of the vehicle I/M program SIP due date with the due date for the attainment demonstration SIP for the area. This will be achieved by revising 40 CFR 51.372(b)(2) of the vehicle I/ M rule 8 to replace the current 1
- ye ar

5 The effective date of designations was July 20, 2012. See 77 FR 30088. 6 See section III.J.2 of this rule for additional information on emission statements. 7 Ty pically submitted in 3
- ye ar increments, thus as 9 percent RFP plans that produce average redu ctions of 3 percent per ye ar. 8 See 71 FR 17705, April 7, 2006.*** E.O. 12866 Review

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Page 10 of 223 deadline for vehicle I/M program SIP submissions with a deadline of no later than the due date for submitting the area’s attainment demonstration SIP. The EPA is also finalizing the due date of the section 185 penalty fee program SIPs from areas initially

classified as Severe or Extreme for the 2008 ozone NAAQS as 10 y ears from the effective date of designations. For areas that are reclassified to Severe or Extreme after the original 2008 designations and classifications, the EPA will establish an appropriate fee program SIP submission deadline as part of the reclassification action. We note that in the proposed SIP Requirements Rule, the EPA did no t include a specific due date for nonattainment NSR SIPs for the 2008 ozone NAAQS. This final rule includes a due date of 3 y ears from the effective date of designation for states with nonattainment areas for the 2008 ozone NAAQS to submit their nonattainm ent NSR SIPs as a logical outgrowth of the proposed rule and the comments submitted . Additional discussion of this due date and our rationale for that date are provided in the following Comments and Responses section, which discusses NSR requirements in gr eater detail. As proposed, the EPA is finalizing that these various SI P due dates are established based on the effective date of designations for the 2008 ozone NAAQS. For areas initially designated nonattainment, this effective date was July 20, 2012. 9 3. Rationale After considering comments questioning the legal supportability of the consolidated approach, the EPA has concluded that we do not have a sufficient statutory

9 See 77 FR 30088, May

21, 2012; and 77 FR 34221, June 11, 2012.*** E.O. 12866 Review

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Page 11 of 223 basis to provide this flexibility
. 10 Therefore, the EPA is finalizing the approach that the various SIP elements are due based on the timeframes provided in section 182. When implementing the 1997 ozone NAAQS, the EPA provided areas classified as Serious and higher only 3 ye ars to develop and submit attainment demonstration SIPs. The E PA is now providing the maximum of 4 ye ars to develop and submit these SIPs, consistent with the CAA. The policy reasons that existed at the time the Phase 2 rule was developed (i.e., the need for timing consistency between subpart 1 and subpart 2 areas wi thin the same region, the timing of the large
- scale interstate transport modeling underway at the time, and the option of coordinated planning with the similarly timed PM 2.5 SIPs ) are not generally circumstances faced currentl y by the Serious and higher
areas. Thu s, the EPA concludes that it is not appropriate to shorten the time period allowed b y the Act to submit these SIPs. Regarding the alignment of due dates for attainment demonstration SIPs and vehicle I/M program SIPs, the EPA believes this allows the best use of state resources. Areas need to determine together the total amount of emissions reductions needed for attainment and the amount of emissions reductions to achieve from different sectors and strategies (including vehicle I/M), before designing a vehicle I/M program capable of achieving the necessary

reductions to demonstrate attainment. Requiring submittal of a vehicle I/M program in advance of an attainment demonstration for the current or future ozone standard co uld result in significant unnecessary work on modeling and SIP revisions if revisions to the vehicle I/M program are later deemed necessary to integrate
10 The EPA believes that the recent ruling by the D.C. Circuit Court on the Classifications Rule (77 FR 30160, May 21, 2012 ) impacts the level of flexibility EPA is able to provide regarding SIP due date s. See NRDC v. EPA (D.C. Cir. No. 12
- 1321, Dec 23, 2014).*** E.O. 12866 Review

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Page 12 of 223 with the overall attainment strategy . Although no new vehicle I/M programs are required under the initi al designations and classifications for the 2008 ozone NAAQS , this change will apply

to an y current Marginal areas that may be required to adopt vehicle I/M as a result of missing an attainment deadline and being reclassified to a higher nonattainment clas sification in the future
. We believe the submittal date for the section 185 penalty fee program SI Ps is consistent with section 182(d)(3) of the CAA , which provided slightl y more than 10 ye ars for submission of the fee program SIP revision for areas desi gnated as nonattainment and classified as Severe or Extreme by operation of law in 1990 for the 1
- hour ozone NAAQS. The EPA has historicall y based the due date of the SIPs discussed previously from the effective date of designations and sees no reason to d epart from that practice here. 4. Comments and Responses Comment: Several commenters supported the idea of a consolidated SIP submittal, but thought that the 30 months provided in the proposal for the consolidated submittal was not sufficient to entice an y states to take advantage of the option. Many commenters expressed a concern that the EPA did not have a sufficiently firm legal basis to allow states to delay

any of the required SIP submissions bey ond the timeframes provided in the statute , nor to requi re earl y submittal of an y S IP s . Response: The EPA proposed the consolidated approach in an attempt to provide flexibility and a potential burden reduction option to states. After considering the comments questioning the legal supportability of this appro ach, we concluded that at this*** E.O. 12866 Review

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Page 13 of 223 time we do not have a sufficient basis to support this flexibility . Thus, we are not finalizing the consolidated approach. Comment: One commenter disagreed with the EPA’s proposal that the SIP submittal due dates in subpart 2 should run from the effective date of designations. The commenter believed that the SIP due dates must run from the date the designations are signed. Response: We disagree with the commenter that the CAA mandates the SIP submittal due dates in subpart 2 must run from the date the designations are signed instead of the effective date of designation s . The EPA believes that its historic practice of establishing SIP due dates that run from the effective dates of designations, as it did for the 1997 ozone NAAQS , is appropriate and legally supportable . Therefore, we are not deviating from this practice. Comment: Two commenters supported the EPA’s proposal to align the vehicle I/M program SIP and attainment SIP deadlines, while two other commenters stated that any change to the vehicle I/M program SIP deadline needs to be consistent with the deadlines prescribed in the CAA and not delay implementation of required I/M pr ograms. Response: The EPA’s decision to align the I/M SIP submittal deadline with the deadline for submitting the attainment demonstration will not impact the emission reductions achieved through the vehicle I/M program requirement because we are not chan ging the deadline b y which affected areas must begin testing and repairing vehicles. Further, the EPA believes that it must, of necessity , provide a reasonable interpretation of the CAA’s vehicle I/M program SIP submission deadline because the Act’s basic vehicle I/M program SIP submission requirement of “immediately upon enactment” of the CAA*** E.O. 12866 Review

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Page 14 of 223 is impossible to meet. Lastly , given the degree to which the overall attainment demonstration will rely

on emission reductions derived from vehicle I/M, it is reasona ble and cost
- effective to allow states to coordinate these two planning requirements. Comment: One commenter noted that the proposal was silent about the due date of the nonattainment NSR SIP. The commenter stated that the EPA should clearl y establish the associated due dates for nonattainment NSR SI P submittals. Response: The commenter is correct that the discussion of SIP submittal deadlines in the proposed SIP Requirements R ule did not include the date on which states must submit for the EPA’s approval the required nonattainment NSR SIP applicable to the 2008 ozone NAAQS. This final rule includes a deadline of 3 ye ars from the date of designation for states to submit their nonattainment NSR program SIPs for the 2008 ozone NAAQS. This date is consistent wi th the submittal date that the EPA provided states to develop an approvable nonattainment NSR program for the 1997 ozone NAAQS in the Phase 2 Rule, and is consistent with CAA section 172(b), which states that the EPA shall establish a date no later than 3 ye ars from the date of the nonattainment designation. 11 Consequently , the EPA does not believe it has discretion to set a date longer than 3 years, and also concludes that states may need up to 3 y ears to develop and submit any

necessary

SIPs. In the Pha se 2 Rule , we indicated that the 3
- ye ar SI P deadline facilitates coordination of NSR program changes with the submission of the attainment plan, which was also due within 3 ye ars . We recognize that CAA section 182(a)(2)(C)(i), under the heading “Correct ions to the State implementation plans

– Permit programs” contains a
11 See 70 FR 71612 at 71672 and 71683 (November 29, 2005).*** E.O. 12866 Review

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Page 15 of 223 requirement for states to submit NSR SI P revisions to meet the requirements of CAA sections 172(c)(5) and 173 within 2 y ears after the date of enactment of the 1990 CAA Amendments. As exp lained in our Phase 2 rulemaking, we believe the submission of NSR SIPs due on November 15, 1992 fulfilled this CAA requirement. 12 Accordingl y, we do not believe that the 2
- ye ar deadline contained in section 182(a)(2)(C)(i) applies to subsequent NSR SI Ps fo r revised ozone standards, including the nonattainment NSR SIPs for implementing the 8
- hour ozone NAAQS. In addition, we note that while section 182 specifies the offset ratios or major source thresholds to be included in the revised NSR SIP, it is silent as to the SIP submission deadline ( see , e.g. , section 182(a)(4), section 182(b)(5) and section 182(c )). Given this gap in section 182, we believe it is reasonable to look to section 172(b) in establishing a deadline for submission of the nonattainment NSR SIP. While the EPA did not propose a date on which states must submit for the agency ’s approval the required nonattainment NSR SIP, stakeholders could have anticipated that we would continue our prior practice unless we proposed to take a different course. In this rule, we are continuing our prior practice, as reflected in the Phase 2 rule for the 1997 ozone NAAQS, of including a deadline of 3 ye ars from the date of designation for states to submit their nonattainment NSR program SI Ps. B. W hat are the requi rements for modeling and attainment demonstration SIPs? 1. Marginal Areas Under CAA section 182(a), Marginal areas have up to 3 y ears from the effective date of designation to attain the NAAQS, and are not required to submit an attainment demonstration SIP . The EPA offers assistance to states as they consider the most
12 I bid*** E.O. 12866 Review

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Page 16 of 223 appropriate course of action for Marginal areas that may be at risk of failing to meet the NAAQS within the applicable 3 ye ar timeframe. States can choose to adopt additional controls for such areas or they can seek a voluntary

reclassification to a higher classification category . The EPA believes that voluntary reclassification for areas that are not likely to attain by

their attainment date is an appropriate action that will facilitate focus on develop ing the attainment plans required of Moderate and above areas. 2. Moderate Areas a. Summary of the Proposal The EPA proposed to continue to require states with an area classified as Moderate to submit an attainment demonstration , 13 due no later th an 3 ye ars from the effective date of an area’s designation, based on photochemical modeling or another equivalent anal yt ical method that is determined to be at least as effective as that which is required under the Act for Serious and above areas and mult i
- state nonattainment areas. 14 This is the same approach used in the implementation rules for the 1997 ozone NAAQS. 40 CFR 51.908(c).

13 An attainment demonstration consists of: ( 1) technical anal ys es, such as base y ear and future ye ar modeling of emissions which identifies sources and quantifies emissions from those sources that are contributing to nonattainment; ( 2) anal ys es of future y ear emissions reductions and air quality improvement resulting from existing ( i.e. , already
- adopted or “on the books”) nati onal, regional and local programs, and potential new local measures needed for attainment, including RACM and RACT for the area; (3) a list of adopted measures (including RACT) with schedules for implementation and other means and techniques necessary

and appropriate for demonstrating attainment as expeditiously as practicable but no later than the outside attainment date for the area’s classification; and (4 ) a RACM anal ys is to determine whether any additional RACM measures could advance attainment b y one ye ar. 14 State plans for single nonattainment areas that include more than one state (multi
- state nonattainment areas) are also required to have photochemical modeling (see CAA section 182(j)(1)(B)).*** E.O. 12866 Review

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Page 17 of 223 b. Final Action and Rationale The EPA is finalizing requirements for Moderate areas as proposed. The EPA continues to beli eve the requirements for Moderate areas are reasonable, primarily because photochemical modeling is generall y available and reasonable to employ. However, this requirement also explicitly allows for alternative anal yt ical methods to be substituted for or u sed to supplement a photochemical modeling
- based assessment of an emissions control strategy. An y alternative anal ys is should be based on technically credible methods and provide for the timel y submittal of the attainment demonstration and implementation o f SIP controls. States should review the EPA modeling guidance 15 and consult their appropriate EPA Regional Office before proceeding with alternative anal ys es. c. Comments and Responses Comment : Some commenters believed that the EPA exceed s its authority t o require states with Moderate nonattainment areas to use photochemical modeling and thus, undermines states’ discretionary options allowed under the statute. Response : The EPA disagrees with the commenters and believes that we have the authority to requ ire states to use appropriate modeling to predict the effect of emissions on air quality

of any NAAQS as we did for the 1997 ozone NAAQS. Section 182(c)(2)(A) contains specific requirements for states to use photochemical modeling or another similarly

effective equivalent modeling meth od in their SIPs for Serious and

15 The modeling guidance can be found in the EPA’s “Guidan ce on the Use of Models and Other Anal ys es for Demonstrating Attainment of Air Quality Goals for Ozone, PM2.5, and Regional Haze,” at the following website: http://www.epa.gov/scram001/guidance/guide/final

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Page 18 of 223 above nonattainment areas. Additionally , CAA Section 182(b)(1)(A)(i) requires RFP plans for Moderate areas to provide for such specific annual reductions in emissions of VOC and NO x as necessary to attain the NAAQS by

the a pplicable attainment date. The EPA has interpreted this as a requirement for Moderate areas to submit an attainment demonstration. Since photochemical modeling is the most scientifically rigorous technique to determine NO x and/or VOC emissions reductions n eeded to show attainment of the NAAQS and is readily available , we are requiring photochemical modeling (or a similarly effective equivalent modeling method) for all attainment demonstrations (including Moderate areas). The authorit y for this requirement f or Moderate areas is derived from section 110(a)(2)(k), which gives the Administrator the authority to require air quality

modeling for the purpose of predicting the effect on ambient air quality of emissions of any

air pollutant for which there is an esta blished NAAQS. Comment: One commenter stated that allowing up to 3 y ears to submit an attainment demonstration is not sufficient time to allow for the emissions inventory development and modeling required for an attainment demonstration. The commenter
wanted the EPA to allow “the original four ye ar timeline” to submit attainment demonstrations. Response : Section 182 contains two attainment demonstration submittal dates that depend on an area’s classification. For Moderate areas, section 182(b)(1)(A) req uires a plan within 3 y ears of the designation date. For Serious and above areas, section 182(c)(2) requires a plan within 4 y ears of the designation date. In the Phase 2 R ule, 70 FR 71612, at 71639, the EPA required all attainment demonstrations to be sub mitted within 3 y ears of designation. However, for this rule, the EPA proposed to allow the*** E.O. 12866 Review

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Page 19 of 223 original CAA deadlines of up to 3 y ears for Moderate areas and up to 4 y ears for Serious areas, 78 FR 34178, at 34183. While the EPA agrees that the development of emissions inventories and modeling for attainment demonstrations can be a lengthy process, the statute does not allow for more than 3 years for a Moderate area attainment demonstration. However, since the statute does allow up to 4 y ears to submit a Seriou s (and above) area attainment demonstration, in this rule we are allowing the maximum amount of time provided by the statute for such areas . Therefore, the EPA is finalizing the attainment demonstration submittal dates as proposed; up to 3 y ears from the
e ffective date of designation for Moderate areas and up to 4 y ears from the effective date of designation for Serious and above areas. Comment : One commenter stated that there are now a number of rural areas in the country with wintertime ozone attainment issues, and recommended that the EPA exempt rural wintertime ozone nonattainment areas from this requirement because a wintertime photochemical grid model or proven alternative analy tical method has not been developed. The commenter argued that it is the EPA’s responsibility to develop and test models that can be used consistently across the nation. Response : The EPA recognizes that the causes of rural wintertime ozone exceedances are different than ty pical summer exceedances. However, the CAA does not distinguish between summer and winter ozone areas. Areas with wintertime violations are designated as nonattai nment based on the same classification thresholds as all other nonattainment areas. They therefore must meet all of the appropriate CAA requirements for their particular nonattainment classification. Nonattainment areas classified as Moderate and above, ev en those that may experience wintertime ozone problems, are*** E.O. 12866 Review

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Page 20 of 223 required to submit an attainment demonstration. However, there is flexibility in determining anal yt ical methods to be used in developing the demonstration. The EPA will consider the nature of the ozone problem in reviewing available models and potential alternative methods for demonstrating attainment. There is also ongoing research that has successfull y identified enhancements in modeling science which have improved photochemical model performance in wintertime ozone situations. Some of these science updates may

be available for states to use in their attainment demonstrations by the time modeling is needed for areas with wintertime ozone problems. 3. Serious and Above Areas For Serious and higher
- classified areas, section 182(c)(2)(A) states that attainment demonstrations must be submitted within 4 y ears of the designation date and be based on photochemical grid modeling or an equivalent effective method. We continue to believe that photoche mical modeling is the most technically credible method of estimating future ye ar ozone concentrations based on projected VOC and NO x precursor emissions. Therefore, consistent with the CAA and previous implementation rules, states with areas classified as Serious and higher are required to submit attainment demonstration s within 4 y ears of the effective date of designation , based on photochemical modeling or an alternative anal yt ical method determined by the Administrator to be at least as effective. 4. W h at guidance is there for using models to demonstrate attainment? The procedures for modeling ozone as part of an attainment demonstration are well developed and described in the EPA’s “Guidance on the Use of Models and Other Analy ses for Demonstrating Att ainment of Air Quality Goals for Ozone, PM 2.5 , and*** E.O. 12866 Review

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Page 21 of 223 Regional Haze.” 16 This guidance document, as it currently exists, can be used by states for purposes of developing attainment demonstration SIPs for the 2008 ozone NAAQS. Commenters requested that the EPA update its modeling guidance pertinent to ozone and that it be made available in advance of SIP submission deadlines. T he EPA agrees with this comment and is therefore currently updating the modeling guidance , and
we intend to issue the update d guidance p rior to the SIP deadlines. 5. Capturing H

igh E missions D ays in I

nventories In the proposed SIP Requirements Rule, the EPA did not propose changes to modeling requirements for modeling high emissions day s. The current modeling guidance addresses, among man y other considerations, episode selection and accounting for variabilit y in emissions and meteorology. Additionally , there is a known phenomenon called High Electricit y Demand Days (HEDD), which are time periods with relativel y higher NO x emissions fro m electric utilities during high energy demand periods. Since NO x emissions from electric power generation are a significant contributor to the total NO x emissions for man y ozone nonattainment areas, states that experience this phenomenon should ensure that these emissions are included in photochemical modeling of episode day s on which the HEDD phenomenon occurs. In order to properl y account for HEDD emissions in the modeling, careful attention should be paid to the temporalization of emissions to the speci fic day and hour of the day

when these emissions occur. We note that the EPA’s current

16 The modeling guidance can be found at the following website: http://www.epa.gov/scram001/guidance/guide/final

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Page 22 of 223 modeling guidance 17 already addresses episode selection and development of accurate emissions input information during peak ozone periods. Some commenters urged the EPA t o update the current modeling guidance. The EPA is in the process of updating the current modeling guidance and intends to more specificall y address modeling of the HEDD phenomenon in that guidance
. The EPA did not propose changes in this rule to the emiss ion inventory requirements for capturing high emissions day s but received many comments on the rule requirements that should have been directed to EPA guidance documents under development for ozone emission inventories (see section III.3 of this preamble)
. They will be considered when these guidance documents are reviewed. The EPA does address the comments referring to the emission inventory guidance in the R esponse to C omments document for this rule. The comments do not directly impact the outcome of this rule. The EPA responses are provided for completeness and to provide these commenters with more information regarding the EPA’s intentions for guidance development related to HEDD emissions. 6. Modeled Attainment Test The EPA’s attainment demonstration modeling guidance addresses the modeled attainment test for ozone, which uses a combination of ambient ozone data and modeled ozone concentrations to estimate future year air quality. The attainment test is applied at
eac h monitor location within or near a designated nonattainment area. Models are used in a relative sense to estimate the response of measured air qualit y to anticipated future changes in emissions. Future air qualit y is estimated by adjusting recent monitore d values
17 http://www.epa.gov/scram001/guidance/guide/final

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Page 23 of 223 by the modeled relative response to projected future changes in emissions. 18 The EPA additionally

recommends application of an attainment test to be performed in unmonitored areas. The recommended attainment test methodology for unmonitored
area s has been used in 8
- hour ozone SIPs developed for the 1997 ozone NAAQS. To make it easier for states to apply the attainment tests, both the monitor
- based test and the unmonitored area test have been incorporated in a software package called the “Modeled Attainment Test Software” (MATS). The MATS is available for no charge at: http://www.epa.gov/scram001/modelingapps_mats.htm
. 7. W hat future year(s) should be modeled in attainment demonstrations? a. Summary of the Proposal The EPA proposed that for the 2 008 ozone NAAQS, control measures relied upon to demonstrate attainment should be implemented by the beginning of the last full ozone
18 The EPA recommends using ambient design values that are consistent with the official design values as calculated according to 40 CFR part 50 Appendix N (PM 2.5 NAAQS) and Appendix P (8
- hour ozone NAAQS). This includes flagging and removing event
influenced data that meet the requirements set forth in the Exceptional Events Rule (40 CFR 50.14). In general, air agencies flag data that they believe may

qualify for r emoval as an exceptional event and are then responsible for developing and providing documentation to the EPA to support these requests for exclusion. EPA Regional Offices review exceptional events claims and decide whether to concur with each individual c laim. Once the EPA concurs with an air agency ’s request, the event
- influenced data are officiall y noted and removed from the data set used to calculate official design values. In some cases, historical ambient data may meet the requirements of the Exceptio nal Events Rule, but remain in the data set used to calculate official design values. Air agencies may not have flagged these data as being potentially influenced by

exceptional events , or may have flagged these data but not submitted the required document ation. Air agencies sometimes do not closely examine potential event - influenced data that do not affect attainment/nonattainment decisions. However, the influence of potential event
- influenced data may affect future ye ar projections that are part of the mo deled attainment demonstration. If potential exceptional event
- influenced data from the historical record are likel y to affect the outcome of the modeled attainment demonstration, we encourage air agencies to consult with their EPA regional office to determine how best to handle this situation.*** E.O. 12866 Review

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Page 24 of 223 season prior to the area’s attainment date. Accordingl y, the future ye ar attainment modeling should not extend bey ond that time period. b. Final Action and Rationale The EPA is finalizing this action as proposed. The EPA stated in the proposal that the future modeling ye ar should be selected such that all emissions control measures relied on for attainment will have been imp lemented by that y ear. This same approach
was used for the 1997 ozone NAAQS and we continue to believe it is an appropriate approach for modeling of control measures. To demonstrate attainment, the modeling results for the nonattainment area must predict that emissions reductions implemented by the beginning of the last full ozone season preceding the attainment date will result in ozone concentrations that meet the level of the standard. 19 Because an area must attain “as expeditiously as practicable,” addi tional considerations are necessary before a future attainment date can be established
. For example, although the latest attainment date under the Clean Air Act for a Moderate area designated in 2012 would be six y ears after the effective date of designation , Jul y 20, 2018, under the 2008 ozone NAAQS Classifications Rule, see NRDC v. EPA, the state would need to conduct an anal ys is of reasonabl y available control measures (RACM) (CAA section 172(c)(1)) to determine if it can advan ce the area’s attainment date by at least a year. 20 Results of the RACM anal ys is may indicate attainment can be achieved

19 Note that for purposes of the 2008 ozone NAAQS, a determination of attainment (or failure to attain), which the EPA is required to make after the attainment date has passed, is based on the most recent 3 compl ete y ears of ambient data prior to the area’s attainment date. Attainment date extensions are only available if the 4th maximum 8
- hour average ozone concentration in the attainment y ear is below the level of the standard. 20 See section III.D.2 of this prop osal for a discussion of RACM analy sis requirements.*** E.O. 12866 Review

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Page 25 of 223 earlier through implementation of reasonabl y available control measures prior to July 20 of an earlier ye ar. . For instance, if emission reductions sufficient to demonstrate attainment are implemented prior to July , 2016, , then in this example the attainment y ear and the future projection ye ar should be 2016. The proposal for this rulemaking also stated21 that, in determining the attainment date that is as expeditious as practicable, the state should consider impacts on the nonattainment area of intrastate transport of pollution from sources within its jurisdiction, and potential reasonable measures to reduce emissions from those sources. We strongl y recommend that the state discuss the selection of the future ye ar(s) to model with the appropriate EPA Regional Office as part of the modeling proto col development process.
c. Comments and Responses Comment: Man y commenters supported the EPA’s proposal ; however, one commenter believed that it should not matter when the control measure is implemented if the demonstration shows attainment by the attainment date. The commenter provided a specific example of when a large point source plans to shut down in the middle of an
ozone season. Response: The EPA continues to believe that modeling the emission reductions implemented by

the beginning of the last full ozone season preceding the final y ear of the statutory attainment date is reasonable. The effect on attainment of the NAAQS of emissions reduct ions that may occur sometime after the start of an ozone season is necessarily

uncertain, and cannot be reliably counted on to ensure modeled attainment in
21 See 78 FR 34178 at p. 34191 ( June 6, 2013).*** E.O. 12866 Review

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Page 26 of 223 that y ear . Information about source shutdowns or other emissions reductions that are not accounted f

or in the modeling can be used as part of a weight of evidence demonstration ( i.e. , qualitative adjustment based on reductions from additional measures) if necessary to demonstrate timely

attainment
. Comment: One commenter supported the proposal to allow modeling of up to the last y ear of the statutory

attainment date, but disagreed with the RACM requirement to evaluate if attainment can be advanced. The commenter disagreed with any thing that would require the demonstration of attainment to be earlier than is required by statute. Response: The EPA disagrees with the commenter . A demonstration of attainment would not be required earlier than is required by statute. The statute provides maximum dates by which attainment must be achieved, but in all cases the statute requires that attainment must be achieved as expeditiously as practicable but no later than the maximum date . Therefore, a RACM anal ys is to examine whether the attainment date can be advanced is required by the statute as part of all attainment dem onstrations. Note that a RACM analy sis is not required for Marginal nonattainment areas since an attainment demonstration is not required for those areas
. 8. Multi

- state Nonattainment Areas Under CAA section 182(j), each state located in a portion of a multi
- state ozone nonattainment area is required to use photochemical grid modeling ( or any other anal yt ic method determined b y the Administrator to be at least as effective ) and to take all reasonable steps to coordinate, substantively and procedurally , the development, submittal and implementation of SIPs applicable to the various states within the nonattainment area. The EPA interprets CAA section 182(j) to require coordination on all*** E.O. 12866 Review

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Page 27 of 223 aspects of nonattainment SIPs, including the development of an attainm ent demonstration
. The EPA did not propose any changes to this longstanding policy , and we did not receive adverse comments on this item. C. W hat are the RFP requirements for the 2008 ozone NAAQS? 1. Overview of RFP requirements Areas that are designated nonattainment for ozone must achieve reasonable further progress ( RFP ) toward attainment of the ozone NAAQS. Part D of the CAA contains three separate provisions regarding RFP. Under subpart 1, section 172(c)(2) contains a general requirement that nonattainment SIPs must provide for reasonable further progress; RFP is defined in section 171(1) as “such annual incremental reductions in emissions” as required by part D or as required by

the Administrator for ensuring attainment of th e NAAQS. Sections 182(b)(1) and 182(c)(2)(B) under subpart 2 contain specific percent reduction targets for ozone nonattainment areas classified as Moderate and above and Serious and above, respectivel y. For Moderate and above areas, section 182(b)(1) requ ires a 15 percent reduction in VOC emissions from the baseline anthropogenic emissions within 6 years after November 15, 1990. We often refer to this RFP requirement as rate
- of
- progress (ROP). For Serious and above areas, section 182(c)(2)(B) requires an a dditional 3 percent per year reduction in VOC emissions, averaged over consecutive 3
- year periods, starting within 6 y ears after November 15, 1990 and until the attainment date. Section 182(c)(2)(B) allows NO x reductions to be substituted for VOC reduction s under certain conditions to meet this RFP requirement. Note that the 15 percent requirement must be met by the end of the 6
- ye ar period*** E.O. 12866 Review

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Page 28 of 223 regardless of when the nonattainment area attains the NAAQS. The 3 percent per y ear RFP requirement for Serious and ab ove areas applies each ye ar until the attainment date. The EPA previousl y interpreted the requirements of subpart 2 as they would apply to areas for the 1997 ozone NAAQS, and we proposed to follow essentially the same interpretation with regard to the 2008 ozone NAAQS. With respect to RFP requirements, we interpret the 15 percent VOC emission reduction requirement in section 182(b)(1) such that an area that has alread y met the 15 percent requirement for VOC under either the 1
- hour ozone NAAQS or the 1997 oz one NAAQS (for the first 6 years after the RFP baseline year for the prior ozone NAAQS) would not have to fulfill that requirement again. Instead, such areas would be treated like areas covered under section 172(c)(2) if they are classified as Moderate for the 2008 ozone NAAQS , and would need to meet the RFP requirements under section 182(c)(2)(B) if they are classified as Serious or above for the 2008 ozone NAAQS
. 22 For the purposes of the 2008 ozone NAAQS, the EPA is interpreting section 172(c)(2) to requi re such Moderate areas to obtain 15 percent ozone precursor emission reductions over the first 6 y ears after the baseline y ear for the 2008 ozone NAAQS, and is interpreting section 182(c)(2)(B) to require such Serious and above areas to obtain 18 percent o zone precursor emission reductions in that 6 y ear period. Under the section 172(c)(2) and 182(c)(2)(B) RFP requirements, NO x emission reductions could be substituted for VOC reductions. With the intent of providing direction and/or flexibility to states i n satisfying RFP requirements, we proposed a number of provisions to address issues relevant to

22 Similar interpretation s w ere made for the 1997 ozone NAAQS in the Phase 2 Ozone Implementation Rule, (70 FR 71615, November 29, 2005) and were upheld in NRDC v. EPA, 571 F.3d 1245 (D.C. Cir. 2009).*** E.O. 12866 Review

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Page 29 of 223 implementing RFP under the 2008 ozone NAAQS: (1) allowing states the option of selecting either the EPA’s recommended baseline y ear or an alternate baseline y ear, if justifiable and appropriate; (2) restricting emission reduction measures that can be used to fulfill the RFP requirements; (3) fulfilling ROP/RFP requirements with emission reductions from sources located outside the nonattainment area; (4) removing RFP creditability

determination requirements for certain pre
- 1990 control measures that currentl y achieve de minimis reductions; (5) requiring 15 percent VOC reductions from the nonattainment area emissions inventory baseline during a 6
- ye ar period after d esignation; (6) providing that areas that had previously met the 15 percent requirement for the 1
- hour or 1997 ozone NAAQS would be subject to the RFP requirement of section 172(c)(2) (if classified as Moderate) or 182(c)(2)(B) (if classified as Serious or above) and consistent with those provisions could substitute NO x for VOC; and (7) satisfying ROP/RFP requirements when a 2008 NAAQS nonattainment area is comprised of portions that have an EPA
- approved RFP plan for a previous NAAQS. Through this rulemakin g, the EPA is finalizing actions that address the aforementioned issues. 2. W hat baseline year may states use for the emission inventory for the RFP requirement? a. Summary of Proposal The baseline ye ar inventory for RFP is used as the starting point from which creditable reductions are determined to meet RFP requirements. For the 2008 ozone NAAQS, the EPA proposed that states should use as the baseline ye ar for RFP the calendar year for the most recentl y available triennial emission inventory at the time ROP/RFP plans are developed. As discussed in section III.C.3 of the proposal , ROP plans*** E.O. 12866 Review

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Page 30 of 223 for areas designated nonattainment in 2012 would be due in 2015, and we proposed the baseline year would be 2011 for these areas. We explained that this approach was analogous to the approach provided for RFP in the CAA. 78 FR 34178, at 34190 (June 6, 2013). The CAA required a 1990 baseline for the 15 percent ROP requirement which lined up with the 199 6 attainment date for Moderate areas under the 1
- hour NAAQS. For the 2008 ozone NAAQS, initial area designations were effective in 2012 and the 6
- ye ar RFP period from a baseline of 2011 ( i.e. , January 1, 2012

– December 31, 2017) would line up reasonabl y w ell with the Moderate attainment date of 2018. However, we also proposed that states have the option of selecting an appropriate and justifiable alternate year as a baseline ye ar for RFP. In the proposal, we proposed that if states choose a pre
- 2011 base line y ear, the 6
- ye ar period for achieving the 15 percent reduction starts in January of the y ear following the selected baseline y ear. When a y ear prior to 2011 is chosen as the baseline ye ar, the 6
- ye ar period thus concludes more than 1 ye ar prior to the start of the attainment y ear for the area. In this situation, the EPA proposed that the area is responsible for an additional 3 percent emissions reduction each ye ar after the initial 6
- ye ar period has concluded up to the beginning of the attainment ye ar. The EPA also proposed that for a multi
- state nonattainment area, all states associated with the nonattainment area must consult and agree on the same year to use as the baseline ye ar for RFP. b. Final Action and Rationale For the 2008 ozone NAAQS, the EP A is providing that states should use as the baseline year for RFP, the calendar ye ar for the most recentl y available triennial emission*** E.O. 12866 Review

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Page 31 of 223 inventory at the time ROP/RFP plans are developed, which in the case of areas designated nonattainment in 2012 translat es to 2011. We finalized this same interpretation for purposes of implementing the 1997 ozone NAAQS. 40 CFR 51.910(d). We are also allowing an alternate ye ar to be used. In determining the appropriate alternate ye ars, the EPA recognizes that some states may have initiated certain control strategies between the ye ar the standard was finalized (2008) and the most recentl y available triennial emission inventory y ear (2011), and that it would be appropriate to recognize these investments in implementing early r eductions to achieve improved air quality . We also believe that allowing alternate baseline y ears prior to 2008 ( e.g. , 1990 and 2007) would not be appropriate because we believe that it is necessary for RFP credit for attainment planning to be tied as dire ctly as possible to promulgation of the 2008 ozone NAAQS. Emission reduction measures adopted into the SI P prior to promulgation of the 2008 NAAQS are certainl y helpful for improving air quality , and consequently may lower the nonattainment classification of an area and the baseline inventory
. However, they

are not readily

tied to attainment planning for the specific standard and associated nonattainment designation that did not y et exist when the measures were adopted , and therefore are not appropriate to be credited for fulfilling nonattainment area RFP requirements for the 2008 ozone NAAQS . We also recognize that since we designated most areas on April 30, 2012, with an effective date 60 day s after publication in the Federal Register , that 2012 (the designation y ear) is an appropriate alternative baseline year consistent with the subpart 2 structure. With these considerations, the EPA is finalizing that states may use an alternate y ear ( i.e. , other than 2011) between the ye ars of 2008 to 2012 that the stat e justifies as appropriate. We are also finalizing as proposed*** E.O. 12866 Review

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Page 32 of 223 that states selecting a pre
- 2011 alternate baseline y ear must achieve 3 percent emission reductions each ye ar after the initial 6
- ye ar period has concluded up to the beginning of the attainment ye ar. For example, if 2009 is chosen as a baseline ye ar for a Moderate area that has an attainment date of July 20, , 2018, the 15 percent reductions cover the period from January

1, 2010 , to December 31, 2015. The state would need to generate an additional 3 percent emissions reduction per ye ar for the area for the ye ars 2016 and 2017. We are also finalizing that for a multi
- state nonattainment area, all states associated with the nonatta inment area must consult and agree on the same year to use as the baseline ye ar for RFP. c. Comments and Responses Comment : We received mixed comments regarding the appropriate baseline y ear for RFP. Some commenters believed that 2011 would be the most su itable y ear to use as a baseline ye ar for ROP/RFP plans and others urged the EPA to allow states the option of justifying an alternative baseline y ear, including 2012, 2008, 2007 and 1990. One commenter argued that the CAA does not provide flexibility in a llowing a choice of baseline year for RFP and that the EPA must set the baseline ye ar as 2012. Response : While 2011 may be the most suitable year for many areas, we believe it is appropriate to provide some flexibility to choose an alternate y ear that falls between the y ear the NAAQS was established (2008) and the y ear of designation (2012 for the initial area designations). The EPA disagrees with the comment suggesting that the CAA does not provide the flexibility to allow states to choose the appropriate baseline y ear and that the EPA must set the baseline year as 2012. While the CAA does identify a specif ic*** E.O. 12866 Review

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Page 33 of 223 ye ar to use as the baseline for purposes of the 1
- hour NAAQS that was in place when the CAA Amendments of 1990 were enacted, we believe use of that y ear (1990) as the baseline would produce absurd results if used for a revised NAAQS that is being implem ented more than 20 y ears later. Thus, the EPA has discretion in determining how to interpret this provision of the statute for purposes of implementing the 2008 ozone NAAQS. Nothing in the statute explicitly or implicitly

suggests that all areas must use the same baseline ye ar. The purpose of the RFP requirement is to ensure areas achieve percentage reductions in emissions that will help an area attain the NAAQS and to not delay emission reductions until close to the attainment date. Thus, we believe a base line ye ar that is reasonabl y cl ose to the designation date and within the implementation timeframe of the revised NAAQS will ensure that the goal of the RFP provisions is met. We note also, that regardless of the baseline ye ar selected, the final regulatio ns provide that areas must continue to achieve annual percentage reductions up to the attainment ye ar. This will further ensure that the purpose of the RFP provisions is fulfilled. We do not believe it is reasonable to select as a baseline year for RFP pur poses a year that predates both the revisions to the NAAQS in 2008 and nonattainment designations. Comment : One commenter noted that the EPA’s proposal would require areas selecting a pre
- 2011 baseline, to achieve 3 percent emission reduction each y ear af ter the initial 6
- year period has concluded up to the beginning of the attainment year. The commenter urged the EPA to apply the same requirement to Moderate areas selecting 2011 as a baseline ye ar and require an additional 3 percent emissions reduction fo r the final y ear before the attainment deadline. Comments varied on our proposal for areas to achieve 3 percent emission reductions when selecting a pre
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Page 34 of 223 Commenters generally

supported the alternate baseline y ear proposal, however, oppos ing commenters stated the proposed 3 percent reduction requirement seemed to penalize states selecting a pre
- 2011 baseline y ear. Response : The first commenter correctl y identifies that the EPA’s selection of the 2011 baseline year creates a gap period of up to 12 months between the end of the 6 y ear ROP period and the latest attainment date for Moderate areas. The final rule specifies that RFP for this 1
- ye ar gap period is whatever additional emissions reductions are needed to achieve the goal of attainment. We believe that requiring Moderate areas using 2011 as a base year to obtain an additional 3 percent per year during the 2018 attainment year where doing so is not necessary to attainment would be more than Congress intended to require through the RFP requirements under Part D of Subchapter 1 of the CAA Amendments of 1990. However, because a pre
- 2011 baseline would be voluntarily selected b y a state and would create a larger gap period before the attainment date than a 2011 bas eline (as much as 2 to 4 y ears), we believe the language “whatever additional emissions reductions are needed for attainment” is not specific enough to ensure annual incremental progress through the latest attainment date. Therefore, we are finalizing as p roposed an additional 3 percent per ye ar as a reasonable RFP reduction requirement for a state that chooses to take advantage of the regulatory flexibility

this regulation offers b y selecting a pre - 2011 baseline. CAA section 171(1) defines reasonabl e further progress under Subpart D to include such annual reductions as “may reasonable be required b y the Administrator for the purpose of ensuring attainment of the applicable national ambient air quality

standard by

the applicable date.” Consistent with that , if a state chooses to use an earlier baseline ye ar, its total RFP emission reduction obligation should be to ensure*** E.O. 12866 Review

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Page 35 of 223 that additional reductions averaging 3 percent per year for each ye ar bey ond the first 6 ye ars until the y ear before th e attainment year are provided for in the RFP plan. However, the EPA continues to believe the 2011 NEI reporting ye ar is the preferred baseline year for RFP planning purposes. Comment : Comments were mixed in relation to the proposal that states associate d with multi
- state nonattainment areas must consult and agree on the same alternate ye ar to use as the baseline y ear for RFP. Commenters generall y agreed with our proposal, however, several commenters indicated that RFP demonstrations are state specific an d do not necessaril y rel y on a regional inventory. Response : The EP A believes that the CAA requires that RFP be demonstrated for a nonattainment area as a whole. Thus, in order to effectivel y anal yz e RFP reductions and ensure that the entire nonattainment area achieves the RFP requirements, it is critical that the same baseline be used for all portions of the area. We note that section 182(j), requires that states in a multi
- state nonattainment area take all reasonable steps to coordinate their plan. 3. C an emission reductions from sources located outside the nonattainment area boundary apply toward ROP and RFP? a. Summary of Proposal The EPA proposed that for the 2008 ozone NAAQS states may not take credit for VOC or NO x reductions occurring outside the n onattainment area for purposes of meeting the 15 percent ROP requirement and 3 percent RFP requirements of sections 172(c)(2), 182(b)(1) and (c)(2)(B). In the preamble to the proposal, the EPA noted that it would be sound policy

to allow areas to use reduc tions coming from outside the area to meet*** E.O. 12866 Review

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Page 36 of 223 ROP/RFP requirements, but concluded that in light of the reasoning used in N atural R esources D efense C

ouncil (NRDC) v. EPA , 571 F.3d 1245 (D.C. 2009) , and the language of the CAA, there is no legal basis for states to credit emissions reductions from sources outside the nonattainment area for satisfying ROP/RFP requirements. Inthe proposed rule, we also stated that if the EPA received comment providing a clear legal justification for allowing areas to take credit in their RFP plan for reductions outside the nonattainment area, we would consider adopting that approach in the final rule. b. Final Action and Rationale The EPA is finalizing the interpretation that states may not take credit for VOC or N O x reductions occurring from sources outside the nonattainment area for purposes of meeting the 15 percent ROP and 3 percent RFP requirements of sections 172(c)(2), 182(b)(1) and (c)(2)(B). This approach means that ROP credit for meeting the 15 percent VOC requirement for Moderate and above ozone nonattainment areas in section 182(b)(1), and the additional 3 percent per ye ar RFP requirement for Serious and above ozone nonattainment areas in section 182(c)(2)(B), or for meeting the RFP requirement of section 172(c)(2) for Moderate areas that met the 15 percent requirement for a previous NAAQS , can come only from emission reductions from sources located within the nonattainment area. The ROP/RFP requirements in CAA 182(b)(1)(A)(i) and 182(c)(2)(B) require that nonattainment SIPs provide for emission reductions from “baseline emissions.” CAA section 182(b)(1)(B) defines baseline emissions as “the total amount of actual VOC or NO x emissions from all anthropogenic sources in the area .” (emphasis added) The ROP/RF P language in 182(b)(1)(B) and 182(c)(2)(B) is almost identical to the language*** E.O. 12866 Review

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Page 37 of 223 in the CAA’s RACT provision that the D.C. Circuit Court has interpreted as requiring emission reductions to come from within the nonattainment area and not “from sources outsid e the nonattainment area.” NRDC v. EPA, 571 F.3d 1245, 1256 (D.C. Cir. 2009). Accordingl y, for reasons explained more fully in the proposal, 78 FR 34178, at 34191 (June 6, 2013), the EPA has concluded that there is no legal basis allowing states to credit reductions achieved at sources outside the nonattainment area toward meeting ROP/RFP requirements. c. Comments and Responses Comment : Several commenters suggested that the EPA allow credit toward meeting ROP/RFP for emission reductions from an area larger than the nonattainment area but related to or affecting it, such as the same airshed or an air quality control region or a “transport couple area.” These comments emphasized the close connection between air quality

within the nonattainment area and emissions from outside that area and argued that controlling emissions from an area outside a nonattainment area may be a very effective way

to improve air quality

within the nonattainment area. They argued that statutory references to “the area” do not n ecessarily refer onl y to the “nonattainment area.” A commenter suggested that CAA section 107(c) provides the EPA the authority to allow outside
- the
- area reduction credits for satisfying RFP requirements. Other commenters note that CAA 182(b)(1)(B), viewed in isolation, does not directl y refer to sources in the nonattainment area, but rather to “sources in the area,” and that NRDC v. EPA addresses sources in the nonattainment area only for purposes of meeting RACT nonattainment SIP requirements under CAA 17 2(c)(1). Other commenters took the*** E.O. 12866 Review

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Page 38 of 223 opposite view, arguing that the EPA had no legal basis for allowing states to use out of area reductions to meet RFP requirements. Response : As explained more fully in the R esponse to C omments document in the docket, to some extent, the comments in support of allowing out
- of
- area credits were either policy

arguments or suggestions about how best to implement a program allowing such credits. The EPA agrees that some of these are good policy arguments , but does not see a le gal basis to allow this approach . While some commenters did provide legal arguments, upon examination the EPA does not believe they overcome the restrictions in the combined language of CAA section 182(b)(1)(B) with sections 182(b)(1)(A)(i) and 182(c)(2)(B ), and the reasoning in NRDC v. EPA concerning reductions within the nonattainment area
. ( See the Response to Comments document, located in the docket, for detailed responses to all of the arguments presented and explaining wh y EPA believes the statutory p rovisions taken as a whole clearl y support the interpretation that these RFP reductions must occur within the nonattainment area). 4. Restrictions on Emission Reduction Measures that can Fulfill the ROP/RFP Requirement a. Summary of Proposal The EPA prop osed that, e xcept as specifically provided in section 182(b)(1)(D) of the CAA, all SIP
- approved or federall y promulgated emissions reductions that occur after the baseline emissions inventory y ear are creditable for purposes of the ROP/RFP requirements, pr ovided that the reductions meet the standard requirements for creditability . That is, to receive SIP credit, the reductions must be enforceable, quantifiable, permanent and surplus.*** E.O. 12866 Review

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Page 39 of 223 b. Final Action and Rationale We are finalizing, as proposed, that all S IP
- approved or federall y promulgated emissions reductions that occur after the baseline emissions inventory y ear from sources located in the nonattainment area are creditable for purposes of the ROP/RFP requirements, provided the reductions meet the standa rd requirements for creditability and are not prohibited by section 182(b)(1)(D) of the CAA. For the reasons provided in the preamble to the proposed rule, 78 FR 34178, at 34187 (June 6, 2013), the EPA believes it is appropriate to credit emissions redu ctions that actually

occur during the relevant ROP/RFP period and after the baseline y ear. We promulgated a regulatory provision adopting this same interpretation for purposes of implementing the 1997 ozone NAAQS. 40 CFR 51.910(a)(2). No significant comments were received. 5. How should states account for non

- creditable reductions when determining compliance with the ROP/RFP emission reduction requirements ? a. Summary of Proposal Section 182(b)(1)(D) specifies four categories of control measures that are not creditable toward the 15 percent ROP requirement under CAA section 182(b)(1)(A): (i) measures related to motor vehicle exhaust or evaporative emissions promulgated by January 1 , 1990; (ii) regulations concerning Reid vapor pressure ( RVP ) promulgated b y November 15, 1990; (iii) measures to correct previous RACT requirements; and (iv) measures required to correct I/M programs. As noted in the proposal, with the exception of the fi rst category , reductions from these measures were achieved many y ears ago, so the question of creditability is moot for RFP credits for the 2008 ozone NAAQS. Citing*** E.O. 12866 Review

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Page 40 of 223 an assessment that at this point in history the ongoing emissions reductions from pre
1990 control measures in the first category are de minimis the EPA proposed that states would no longer need to perform the complicated calculations for these control measures to ensure that they

are not credited toward the 15 percent ROP requirements under
sec tion 182(b)(1)(D). ( See 78 FR 34178 at 34189) b. Final Action and Rationale Consistent with the proposal, the EPA is finalizing the approach that eliminates any obligation for states to continue to perform emissions reduction calculations for the pre - 1990 control measures listed under section 182(b)(1)(D)(i). The CAA section 182(b)(1)(D)(i) provides that motor vehicle emission reductions resulting from meas ures promulgated “b y J anuary 1, 1990,” (which can only come from pre - 1990 vehicles), are “not creditable.” The EPA is aware that making the calculations necessary to ensure a state does not take credit for these measures would be “a very resource intensive process requiring multiple modeling runs and extensive staff time,” as we stated in the proposal for this rulemaking 23 . Furthermore, the EPA recognizes that emissions from pre
- 1990 vehicles are a very small and diminishing part of the total emissions inventory

for any RFP
- related ye ar associated with implementation of the 2008 ozone NAAQS (which under the final implementation rules could start, at earliest, in 2008). This final action will relieve states of the burden of doing the calculations “based on the de minimis nature” of the potential credits. 24 c. Comments and Responses

23 See 78 FR 34178, at 34190 (June 6, 2013) 24 Ibid*** E.O. 12866 Review

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Page 41 of 223 Comment : A majority

of commenters supported removing the calculations requirement. However, one commenter argued that the EPA cannot remove the calculation requirement because the p rovision in 182(b)(1)(D) that certain emission reductions are “not creditable” toward RFP reductions “is the sort of extraordinarily rigid statutory provision that does not allow for de minimis exceptions.” The commenter further asserts that the EPA has not demonstrated that the non
- creditable reductions will alway s be de minimis because the EPA failed to review the impact of this exception on any specific nonattainment areas, rel yi ng instead on national modeling from which the EPA has claimed th at local results may vary . Response : The EPA thanks the commenters that support this approach. The EPA disagrees, however, with the commenter who argued that the EPA cannot relieve states of this burden based on the de minimis impact of the measures. CAA section 182(b)(1)(C) established a general rule allowing credit toward RFP requirements for emission reductions under a SIP that would occur within the 6 ye ars following November 1990. Section 182(b)(1)(D) established four narrow exceptions to that general rule, three of which are currently entirely moot because they have alread y occurred and are not ongoing reductions for future RFP purposes. The comment concerns the motor vehicle emission reduction measures imposed on pre
- 1990 motor vehicles. The EPA has concluded that these reductions are ever diminishing as each ye ar the motor vehicle fleet continues to replace older vehicles with new vehicles. The EPA estimates that by 2017 the control measures that appl y to the pre
- 1990 portion of the nationwide vehicl e fleet would account for only between 0.2 and 0.6 percent of total on
- road VOC or NO x emissions, or between about 0.1 and 0.3 percent of total VOC or NO x emissions*** E.O. 12866 Review

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Page 42 of 223 inventories. Because calculating those emissions reductions would be very resource intensiv e, the EPA proposed not to require states to calculate them based on the de minimis nature of the reductions. Courts recognize that agencies generally have discretion to overlook circumstances that in context can fairly be considered de minimis such as requirements whose literal application would mandate pointless expenditures “when the burdens of regulation yield a gain of trivial or no value
. ” 25 The EPA does not believe that the creditability

exemption in 182(b)(1)(D)(i) is so “extraordinaril y rigid” as to preclude a de minimis exception. The comment also claims that the EPA has not demonstrated that these circumstances are de minimis . Without disputing the EPA’s conclusions as to either the share of the emissions inventory or the resource burdens of the c alculations, the comment nevertheless claims that “local results may vary ,” and the EPA must assess reductions in “specific nonattainment areas.” The comment does not identify an y area where , or any evidence that , the impact of the credits any where would b e more than de minimis. Moreover, the EPA implicitly accounted for local variations when it concluded in the proposal that reductions associated with pre
- 1990 vehicles “every where” will be “a very small fraction of the total on
- road VOC emissions inventory by 2017.” 6. W hat are the RFP plan requirements for 2008 ozone nonattainment areas for which no portion of the area has previously been required to meet the 15 percent ROP requirement for VOC in section 182(b)(1) of the CAA? a. Summary of Proposal

25 See Alabama Power Co. v. Costle, 636 F.2d 323, 360 (D.C. Cir. 1979)*** E.O. 12866 Review

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Page 43 of 223 We proposed that newl y designated 2008 nonattainment areas, 26 namel y 2008 ozone nonattainment areas for which a state has n ever adopted and implemented a SIP providing for the section 182(b) 15 percent VOC emission reductions, will be subject to the 15 percent ROP requirement in section 182(b)(1). We also proposed that for an y 2008 ozone nonattainment area, a state could meet the 15 percent ROP requirement in whole or in part with NO x reductions in lieu of VOC reductions if that state could demonstrate that the area had in fact achieved a 15 percent reduction in VOC emissions within 6 years from a 1990 baseline. We also propos ed that if we did not finalize the proposal to allow any area to substitute NO x reductions for VOC reductions where a state can demonstrate that the area achieved a 15 percent reduction in VOC emissions from a 1990 baseline, then we would allow such substi tution only for new 2008 nonattainment areas located in the OTR that would be subject to the 15 percent ROP requirement for the first time. b. Final Action and Rationale We are finalizing that the ROP plan for a 2008 nonattainment area that has not previ ously

adopted and implemented a SIP providing for a 15 percent reduction in VOC emissions consistent with section 182(b)(1) must provide for a 15 percent reduction in VOC emissions from the area’s baseline emissions in the 6 y ears following the baseline
em issions inventory

y ear. This is consistent with the CAA section 182(b)(1) requirement and the prior approach for the 1997 ozone NAAQS. 40 CFR 51.910(a)(1)(i). The EPA is

26 Hereafter in the discussion of RFP requirements within this section , when we use the term ‘‘2008 nonattainment area’’ we mean ‘‘nonattainment area classified as Moderate or higher under the 2008 ozone NAAQS.’’*** E.O. 12866 Review

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Page 44 of 223 not finalizing either of the additional approaches that would have allowed areas to me et the 15 percent ROP requirement in whole or in part with NO x reductions in lieu of VOC reductions. After reviewing all comments submitted the EPA does not believe that it has the authority

under the CAA to allow NO x substitution for VOC emissions reducti ons for the 15 percent ROP requirement in an y area that has not previously met the 15 percent reduction requirement , including an area in the OTR. c. Comments and Responses Comment : Several commenters raised objections to the EPA’s proposal that would allow only

areas in the OTR to meet the RFP requirements by allowing NO x substitutions. The commenters argued that it would be better to allow all areas to take advantage of this alternative. Response : Although attainment areas in the OTR were not require d to adopt 15 percent RFP plans under section 184 of the CAA , w e discussed certain VOC reduction measures in the proposal. We expected that the VOC reductions from those measures would account for a significant portion of the 15 percent requirement for are as designated nonattainment. We reasoned that since attainment areas in the OTR are required to adopt and implement many

of the same measures applied in nonattainment areas such areas should be treated as having met the 15 percent VOC reduction requirement if they can demonstrate that they

did, in fact, achieve a 15 percent reduction in VOC emissions during the relevant time period , even though they of course would not have submitted a 15 percent plan as they

were not subject to the 15 percent requirement at that time. The EPA has reconsidered its proposal and now believes it does not have authority under the CAA to allow NO x substitution for VOC emissions reductions for the 15 percent ROP in*** E.O. 12866 Review

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Page 45 of 223 any area, including an area located in the OTR, unless the area ha s previously submitted, adopted and implemented a SIP providing for a 15 percent VOC reduction in emissions from the area’s baseline emissions . These emissions reductions would have to have been produced in the 6 y ears following the baseline emissions inve ntory y ear consistent with the requirement in section 182(b)(1) and the prior approach for the 1997 ozone NAAQS. 40 CFR 51.910(a)(1)(i). Comment : One commenter supported the proposed alternative that would allow areas to substitute NO x for VOC, in part or in whole, in the 15 percent ROP plans because the scientific understanding of the relative roles of VOC and NO x control has improved. However, numerous commenters stated their understanding that new nonattainment areas become subject to CAA section 182(b) (1) and are therefore subject to the 15 percent VOC
- only ROP emission reduction requirement which does not provide for an y NO x substitution
. Response : The EPA agrees that the current understanding of the role of NO x reductions in reducing ozone would suggest that, in some areas, it would be relativel y more efficient to focus attainment planning efforts on achieving reductions in NO x rather than VOC emissions. However, for new nonattainment areas , CAA section 182(b)(1 ) expressly requires the 15 percent ROP plans to reduce emissions of VOC. It does not provide discretion to meet these requirements by reducing emissions of other pollutants. Where Congress intended to allow such a substitution, it specifically provided so , such as in section 182(c)(2)(C) which allows NO x to be substituted for VOC in the 3 percent annual RFP plans for Serious and above areas. Absent a showing of absurd results which*** E.O. 12866 Review

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Page 46 of 223 the record for this action does not support, the EPA does not believe it ha s discretion to allow NO x substitution in this case. 7. Wh at are the ROP/RFP plan requirements for 2008 ozone nonattainment areas that consist entirely of one or more areas that fulfilled the 15 percent ROP plan requirement for VOC for a former ozone NAAQS ? a. Summary of Proposal We proposed that an y 2008 nonattainment area which consists entirely of a nonattainment area, or portions of nonattainment areas, for which we previously approved an RFP plan as meeting the 15 percent ROP plan requirement for VOC in section 182(b)(1) of the CAA would not need to submit such an ROP SIP. Such a 2008 nonattainment area could consist of one or more 1
- hour nonattainment areas, one or more nonattainment areas under the 1997 ozone NAAQS, or a combination of nonattainment areas for either the 1
- hour or 1997 ozone NAAQS. 27 Consistent with our approach for the 1997 ozone NAAQS, we proposed to interpret the CAA ’s RFP provisions to mean that a 2008 nonattainment area that had already achieved a 15 percent reduction in VOC emiss ions per an approved 182(b)(1) ROP SI P, would instead be subject to the RFP requirement of section 172(c)(2) (which the EPA has interpreted to represent 15 percent emissions reductions over the first 6
- ye ar period) if classified as Moderate, or the 3 percent per ye ar requirement of section 182(c)(2)(B), if classified as Serious or above,

27 The following nonattainment areas were nonattainment for both the 1
- hour and the 1997 ozone NAAQS, and remained the same size under the 2008 ozone NAAQS compared to the 1997 ozone NAAQS: Baltimore, MD; L os Angeles
- San Bernardino Counties (West Mojave Desert), CA; Los Angeles
- South Coast Air Basin, CA; Riverside County (Coachella Valley), CA; Sacramento Metro, CA; San Joaquin Valley , CA ; and Ventura Count y, CA.*** E.O. 12866 Review

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Page 47 of 223 and under those requirements could substitute NO x emission reductions for VOC emission reductions. b. Final Action and Rationale We are finalizing as proposed, such that 2008 nonattainment areas that have previously

met the CAA requirement for a 15 percent ROP VOC reduction plan for the entire area are not required to fulfill that requirement again. This is consistent with the appr oach we used for the 1997 NAAQS, and the D.C. Circuit Court’s decision in NRDC v. EPA. 28 Inthat case, concerning the EPA’s same interpretation for implementing the 1997 ozone NAAQS, the Court held that section 182(b)(1) is ambiguous under these circumstanc e s and that it was reasonable for the EPA to interpret it not to require areas that had alread y met the 15 percent VOC emission reduction requirement to obtain another 15 percent reduction in VOC emissions. Instead, for purposes of the 1997 ozone NAAQS and for purpose s of the 2008 ozone NAAQS, the EPA interprets the RFP requirement of section 172(c)(2) to require an area classified as Moderate to achieve an average 3 percent annual reduction in VOC and/or NO x emissions for the first 6 years following the baseline y ear, and the RFP requirement in section 182(c)(2)(B) to require the same thing for areas classified as Serious or higher. Under these circumstances, RFP requirements may

be satisfied with reductions in either NO x or VOC emissions. As explained in the proposal, we believe there are two policy reasons for interpreting this ambiguous provision in this manner. First, both our understanding of the effects of reductions of VOC and NO x on ambient ozone levels and the technical tools to help predict what combinations of reductions of ozone precursors will be most effective for
28 See NRDC v. EPA , 571 F.3d 1245 (D.C. Cir. 2009).*** E.O. 12866 Review

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Page 48 of 223 ozone reduction in an y area have improved. Since the purpose of the RFP provisions in sections 172 and 182 is to foster the achievement of reasonable further progress toward attainme nt, we believe that it makes the most sense to allow states to credit toward the RFP requirement those reductions that an area most needs to reach attainment. Second, as explained more fully

in the proposal, the mix of emissions across the country and in
s pecific areas is very

different than it was in 1990 because of various measures and developments that have substantially reduced the anthropogenic VOC emissions inventory such that additional area
- specific VOC reductions will be increasingl y difficult to a chieve. c. Comments and Responses Comment : Numerous commenters agreed with the EPA’s proposal that 2008 nonattainment areas that have already met the CAA requirement for a 15 percent VOC reduction plan are not required to fulfill that VOC requirement again
. Two commenters generall y supported the EPA’s approach but argued fo r reducing the showing a state must make or giving states more latitude in determining how to treat new nonattainment areas. However, o ne commenter stated that although the Court in NRDC v. EPA , 571 F.3d 1245 (D.C. Cir. 2009), held that the EPA could permi ssibly read the statute as requiring SIPs to provide for the 15 percent VOC reduction only once, the Court did not address the question of whether mere EPA approval of a prior 15 percent ROP SIP would satisfy the 15 percent requirement for a subsequent NAA QS, or whether the area would have to show it actually

achieved the 15 percent VOC reduction within the 6 y ears required b y the statute. The commenter stated that to be creditable, the 15 percent reduction must have actually

occurred within 6 y ears of Nove mber 15, 1990 , due to implementation of*** E.O. 12866 Review

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Page 49 of 223 measures required under the SIP, rules promulgated by the EPA, or t itle V permits. Accordingl y, the commenter believed the EPA cannot treat previousl y approved ROP plans as satisfying the 15 percent ROP requirement unless the state also shows that the required VOC reductions were actuall y achieved as required b y section 1 82(b)(1)(C). Response : The EPA thanks the commenters for their supporting comments. The EPA disagrees , however, that s tates must demonstrate that they achieved the 15 percent reduction within 6 ye ars of the baseline for a previous NAAQS. We have consistently maintained that if an area has alread y met the requirement to submit for approval and to implement a plan for reducing VOC emissions by 15 percent within 6 y ears of the baseline year for either the 1
- hour or the 1997 ozone NAAQS , then the area should n ot be required to meet that requirement a second time for the 2008 ozone NAAQS but instead will be subject to the other applicable RFP provisions of the CAA
. 8. W hat are the RFP plan requirements for 2008 ozone nonattainment areas that include portions co nsisting of all or a piece of one or more nonattainment areas for a previous NAAQS that fulfilled the 15 percent ROP plan requirement for VOC for that previous NAAQS and portions that have never been subject to or have never submitted the 15 percent ROP plan for VOC for a previous NAAQS? a. Summary of Proposal For those areas that include all or part of a nonattainment area under a former ozone NAAQS that fulfilled the 15 percent ROP plan requirement for VOC and all or part of an area that was not subject to or did not meet the 15 percent requirement for a former ozone NAAQS, we proposed that a state may choose between two approaches for addressing the 15 percent ROP requirement. First, the state could choose to treat the*** E.O. 12866 Review

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Page 50 of 223 entire area as an area that never met the 15 percent requirement and submit a new 15 percent plan for the entire area . Second, the state could choose to treat the 2008 nonattainment area as divided into two portions: the non
- ROP plan portion and the former ROP plan portion. For the non
- ROP plan portion of the 2008 nonattainment area, the plan would establish a separate 15 percent ROP VOC reduction requirement under section 182(b)(1) of subpart 2. However, VOC emissions reductions to meet the 15 percent requirement could come from across the entire 2008 nonattainment area, provided that the former ROP plan portion of the area also has a VOC reduction target as part of its ROP plan for the 2008 ozone NAAQS. If the 2008 ozone NAAQS ROP plan for the former ROP plan nonattainment area relies sole ly on NO x reductions, then the portion of the nonattainment area never before subject to nonattainment requirements is still responsible for the full 15 percent VOC reductions. We also stated in the proposal that for the former RFP plan portion of the 2008 nonattainment area, the RFP requirements in section 172(c)(2) will apply to Moderate nonattainment areas and the RFP requirements of section 182(c)(2) appl y to areas classified as Serious and above. These areas may both substitute NO x for the VOC reductions in the manner specified in section 182(c)(2)(C). b. Final Action and Rationale We are finalizing the two proposed approaches that a state may choose between for addressing the 15 percent ROP requirement where a portion of th e area submitted and implemented a 15 percent ROP plan for a previous ozone NAAQS and a portion did not. First, the state may

choose to treat the entire area as an area that never met the 15 percent ROP VOC reduction requirement in section 182(b)(1). Secon d, the state may choose to*** E.O. 12866 Review

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Page 51 of 223 treat the 2008 nonattainment area as divided into two portions: the non
- ROP plan portion and the former ROP plan portion. For the non
- ROP plan portion of the 2008 nonattainment area, the plan would establish a separate 15 percent VOC reduction requirement under section 182(b)(1) of subpart 2. However, d ivergent from our proposal that would have allowed creditable VOC reductions to come from across the entire 2008 nonattainment area, the final rule requires that VOC emission reduct ions to satisfy the section 182(b)(1) 15 percent requirement must come entirel y from within the non
- ROP plan area. For the former ROP plan portion of the 2008 nonattainment area, the RFP requirements in section 172(c)(2) appl y if the 2008 nonattainment are a is classified as Moderate. CAA section 182(c)(2)(B) RFP requirements apply if the 2008 ozone NAAQS nonattainment area is classified as Serious or higher. The EPA believes that nonattainment areas with a previously approved 15 percent plan developed to satisfy

previous ozone NAAQS standards are not required to adopt a second 15 percent VOC ROP plan under section 182(b)(1) for purposes of the 2008
ozone NAAQS . The EPA believes that if a portion of the nonattainment area was not subject to an approved 15 per cent plan for previous ozone standards, then section 182(b)(1) applies to that portion of the 2008 nonattainment area. We are offering two options, as described previously , and states can select the appropriate option to meet the RFP requirements. However, due to significant comments received regarding the source of reductions to satisfy

the 15 percent requirement for the non - ROP portion of the area, we are requiring that VOC emissions reductions to meet the 15 percent requirement must come from within the boundaries of the non
- ROP plan portion rather than from across the*** E.O. 12866 Review

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Page 52 of 223 entire nonattainment area as we proposed. Additionally , the ROP plan for the 2008 ozone NAAQS for the new non
- ROP plan portion must provide for 15 percent VOC reductions. c. Comments and R esponses Comment : One commenter opposed both of the EPA’s proposed options , believing that they

are not permissible under the CAA because a prior ROP plan for just part of a 2008 nonattainment area cannot be deemed to satisfy the ROP plan requirement

—that “area” is different from the area encompassed b y the prior ROP plan. The commenter argued that the prior ROP plan could not have provided the 15 percent baseline emissions reduction in an “area” that was not even defined at the time of the prior ROP p lan. The commenter also argued that the statute does not allow the EPA to divide up “the area” into multiple sub
- areas with separate ROP plans or requirements. The commenter also argued that it would be illegal and arbitrary to allow a sub
- area to claim cr edit for emission reductions from outside the sub
- area without having to also add emissions from outside the sub
- area to its baseline. The commenter stated that unless the EPA is proposing to require that the non
- former ROP sub
- area assure a net 15 percent cut from new baseline emissions for the entire 2008 nonattainment area, it cannot allow the sub
- area to claim credit for reductions outside the sub
- area. The commenter believed that for sub
- areas within the nonattainment area, each with its own 15 percent reduction
o bligation, that the required VOC emission reductions must come from inside each sub
area respectivel y. Response : The EPA recognizes that a prior ROP plan would not necessarily encompass the newly

designated portion of a 2008 nonattainment are a and that the newl y designated portion may

not have previousl y been covered b y an approved 15 percent*** E.O. 12866 Review

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Page 53 of 223 ROP VOC plan. In light of this comment, the EPA has reconsidered the proposal and now believes that if a portion or portions of a nonattainment area for the 2008 ozone NAAQS was /were not subject to an approved 15 percent ROP VOC
- onl y plan for either the 1
- hour or the 1997 ozone NAAQS, then section 182(b)(1) requirements apply to that new portion of the 2008 NAAQS nonattainment area. T he EPA disagrees with the commenter’s assertion that the statute does not allow areas to be divided into former ROP plan areas and new non
- ROP areas. Consistent with the reasoning in the Phase 2 R ule, upheld in NRDC v. EPA , we believe that an area, or a
sub
- area that has never met the 15 percent requirement must do so, but that an area (or sub
- area) that has previously met the requirement need not be subjected to it for a second time. Based on similar reasoning, we have reconsidered our proposal that would have allowed emission reductions from across the entire nonattainment area to be creditable toward achieving the 15 percent ROP VOC reductions for the non
- ROP portion(s) of the area. We now believe it is important to recognize that VOC emissions reductions to meet the 15 percent ROP VOC reduction requirement must come from within the boundaries of the non
- ROP plan portion. Accordingl y, the ROP plan for the 2008 ozone NAAQS for the new non
- ROP plan portion must demonstrate achievement of 15 percent VOC reduc tions from that sub
- area’s baseline. 9. Alternative Approaches to Achieving RFP a. Summary of Proposal We requested comment on two alternative approaches to achieve RFP: (1) an air quality
- based approach that would measure RFP in terms of ambient air qua lity improvements tied to an area’s percent emission reduction; and, (2) an approach that*** E.O. 12866 Review

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Page 54 of 223 would adjust (or “weight”) the amount of RFP credit given for reductions of individual species (or similar groups) of VOC based on their ozone forming potential ( i.e. , photochemical reactivity). For each of these alternative approaches, the EPA sought comment on the usefulness and practicality of the approach, and specificall y on whether there is an adequate legal basis under the CAA to approve SIPs that would employ it. b. Final Action and Rationale The EPA is not taking final action on these alternative approaches. The EPA may further consider such alternatives in the future. The EPA believes that more time is needed to better understand the scientific and legal is sues involved in allowing and implementing these approaches. In the meantime, use of these approaches may be considered on a case
- by
- case basis. If states wish to pursue either of these approaches, we encourage them to work closely on developing such an ap proach with their respective EPA Regional Offices. If a state submits an alternative approach to achieving RFP , then the EPA will address the submittal in a separate notice and comment rulemaking action. c. Comments and Responses Comment : Some commenters, while supporting the approaches, believed that the EPA must provide more information on how both the VOC
- weighted approach and the air quality
- based approach would be implemented, a stronger legal justification for allowing these alternatives, and more scientific support for practical implementation. There were commenters that supported the air quality
- based approach. One commenter stated that the air qualit y alternative would better reflect the air quality progress being made in areas ad

jacent to an upwind nonattainment area, whereby the downwind areas*** E.O. 12866 Review

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Page 55 of 223 must rely on large upwind emission reductions to attain the ozone standard. The commenter also argued that states should have the opportunity to demonstrate that such an approach is equival ent to or better than an emission reduction target and believes i t would qualify

as an equivalent planning procedure under section 172(c)(8) and should be included in the final rule. The commenter indicated a similar approach was included in the implementation rules that govern SIP development for the PM 2.5 NAAQS (40 CFR 51.1009(g) and (h)). Other commenters pointed out that the VOC
- weighted reactivit y method has alread y been adopted in other national, state and local ozone regulations , such as the current national aerosol coatings rule and a highl y - reactive VOC emissions cap - and
- trade program and these may serve as legal and administrative precedent s for other reactivity
- based standards. Commenters also cautioned the EPA that such approaches should not be m andated , and must be left to the state's discretion. There were commenters that did not support these alternative approaches , stating that the CAA clearly

requires a percentage reduction from baseline emissions for purposes of RFP. Response : The EPA appre ciates the comments it has received on these alternative approaches. As noted above, the EPA believes more time is needed to better understand the scientific and legal issues involved before finalizing any alternative approaches to achieving RFP. We encour age states to work closely with their respective EPA Regional Offices , who may

consider these approaches on a case
- by
- case basis. An y s uch actions would be addressed through separate notice and comment rulemaking including analy sis of appropriate legal and technical justifications
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Page 56 of 223 D. How do RACT and RACM requirements apply for 2008 ozone NAAQS nonattainment areas? 1. Reasonably Available Control Technology a. Summary of the Proposal The EPA indicated in the proposal that RACT SI Ps must contain adopted RA CT regulations, certifications where appropriate that existing provisions are RACT , 29 and/or negative declarations that there are no sources in the nonattainment area covered b y a specific CTG source category . The EPA also indicated that states must provide notice and opportunity

for public comment on their RACT submission even where the s tate determines it is appropriate to certify that the existing provisions remain RACT or where the state submits a negative declaration. States must also submit appropriate supporting information for their RACT submission as described in the Phase 2 Rule. See 70 FR 71652. The EPA proposed a number of items regarding RACT submittals. First, the EPA proposed that states should use current EPA guidance [ including existing control techniques guidelines (CTGs) and alternative control techniques (ACTs) ] and any other

29 The EPA has defined RACT as the lowest emission limitation that a particular source is capable of meeting b y the application of control technology that is reasonably available c onsidering technological and economic feasibility (December 9, 1976 memorandum from Roger Strelow, Assistant Administrator for Air and Waste Management, to Regional Administrators, “Guidance for Determining Acceptability of SIP Regulations in Non
- Attainment Areas” and also in 44 FR 53762; September 17, 1979). Availability

and feasibility

may differ across sources in the same category ( June 9 , 1985 , memorandum from John Calcagni , Chief , Economic Anal ys is Branch , to G. T. Helms, “ Criteria for Determining RACT in Region IV .” )*** E.O. 12866 Review

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Page 57 of 223 information available in making RACT determinations. 30 The EPA recognized in the proposal that existing CTGs and ACTs for man y s ource categories have not been revised in a number of ye ars. However, in man y cases, more recent technical information is available in other forms
. The EPA proposed that as part of their RACT SIP submission, states should provide adequate documentation that they have considered control technology

that is economically

and technologically

feasible. The anal ys is o f economic and technological feasibility should be based on information that is current as of the time of development of the RACT SI P for the 2008 ozone NAAQS. Additionally , the EPA noted that states should consider information submitted as part of the pub lic comment period associated with the RACT SIP. The EPA proposed that in some cases, states may conclude that sources already addressed b y RACT determinations for the 1
- hour and/or 1997 ozone NAAQS may not need to implement additional controls to meet th e 2008 ozone NAAQS RACT requirement. The EPA proposed to follow the EPA’s existing policy with respect to “area wide average emission rates.” This policy recognizes that states may demonstrate as part of their NO x RACT SIP submittal that the weighted aver age NO x emission rate from all sources in the nonattainment area subject to RACT meets NO x RACT requirements. The EPA proposed that as part of their RACT submission s , states have the option of conducting a technical analy sis for a nonattainment area considering the emissions controls required by a regional cap
- and
- trade program, and demonstrating that

30 The EPA’s CTGs and ACTs are located at http://www.epa.gov/air/ozonepollution/SIPToolkit/ctgs.html
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Page 58 of 223 compliance b y certain sources participating in the cap
- and
- trade program results in actual emission reductions in the particular nonattainment area that are equal to or greater than the emission reductions that would result if RACT were applied to an individual sourc e or source category within the nonattainment area. The EPA provided legal reasoning for this approach. The EPA proposed to follow its curre nt policy that for VOC sources subject to MACT standards, states would be allowed to streamline their RACT anal ysis by including a discussion of the MACT controls and considerations relevant to VOC RACT. Historically , in many

cases, states have been able t o rely on MACT standards for purposes of showing that a source has met VOC RACT. The EPA also noted that a state has discretion to require bey ond
- RACT reductions from an y source, and has an obligation to demonstrate attainment as expeditiously

as practicable. Thus, states may require VOC and NO x reductions that are “bey ond RACT” if such reductions are needed in order to provide for timely attainment of the ozone NAAQS. The EPA solicited comment on modifying existing guidance to provide additional flexibil ity in implementing the section 182(b)(2) RACT requirements. In particular, the EPA solicited comments on whether it would be appropriate for states, as part of their RACT determinations regarding what is “reasonable,” to consider the effect (or lack there of) of VOC emission reductions on reductions in ozone concentrations when assessing economic feasibility . The EPA solicited comments on this approach because in some nonattainment areas, additional reductions of anthropogenic VOC emissions have*** E.O. 12866 Review

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Page 59 of 223 been scient ifically

demonstrated to have a limited impact on reducing ozone concentrations. The EPA took comments on the following: 1) whether state RACT determinations could take into consideration, in the evaluation of what is economicall y feasible, the potential air quality

benefit (or lack thereof) of further VOC controls; 2) the specific circumstances and limitations to which an air quality benefit factor would apply ; 3) specific examples of where modeling has demonstrated that anthropogenic VOC reductions have "negligible effect, ” (commenters were also asked to provide a defensible threshold for defining “ineffective,” and define a test for concluding that the effect of additional VOC reductions would be "negligible."); 4) input regarding whether this flexibili ty should be provided on an individual source basis, or also on a source category basis; 5) that any

approaches suggested by commenters should also address how public health and welfare will be impacted; and 6) an explanation as to the specific legal basis for supporting the suggested approach. Finally , the EPA proposed a specific deadline by which RACT measures are to be implemented for the 2008 ozone NAAQS, which is consistent with the timeline specified in CAA Section 182(b)(2). For the 2008 ozone NAAQS , we proposed that areas must implement RACT measures as expeditiously as practicable, but no later than January 1 of the 5th ye ar after the effective date of a nonattainment designation. Nonattainment designations for all areas of the country were effecti ve July

20, 2012. RACT measures for areas classified Moderate or above and all areas of the OTC would be required to be implemented by

January 1, 2017. This would allow a comparable amount of time for*** E.O. 12866 Review

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Page 60 of 223 sources to meet RACT requirements as originall y anticip ated under the 1990 CAA Amendments, consistent with the Moderate area attainment date of July 20 , 2018. b. Final Action and Rationale The EPA is finalizing the approach where states should refer to the existing CTGs and ACTs for purposes of meeting their RACT requirements, as well as all relevant information (including recent technical information as well as information received during the public comment period) that is available at the time that they are developing their RACT SIPs for the 2008 ozone NAAQS. We believe that there is sufficient information available to states to inform their RACT determinations. The EPA is finalizing the a pproach allowing in some cases for states to conclude that sources alread y addressed b y RACT determinations for the 1
- hour and/or 1997 ozone NAAQS do not need to implement additional controls to meet the 2008 ozone NAAQS RACT requirement. We believe that, in some cases, a new RACT determination under the 2008 standard would result in the same or similar control technology as the initial RACT determination under the 1
- hour or 1997 standard because the fundamental control techniques, as described in the CTGs and ACTs, are still applicable. 31 Incases where controls were applied due to the 1
- hour or 1997 NAAQS ozone RACT requirement, we expect that any incremental emissions reductions from application of a second round of RACT controls may

be small and, theref

ore, the cost for advancing that small additional increment of reduction may not be reasonable. In contrast, a RACT anal ys is for

31 See existing guidance in RACT Questions and Answers 2006 (May 18, 2006 , Note from William Harnett to Regional Air Division Directors ), Questions 17 and 18, regarding RACT c ertifications
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Page 61 of 223 uncontrolled sources would be much more likel y to find that new RACT
- level controls are economicall y and technically feasible. The EPA is finalizing the proposed approach with respect to “area wide average emission rates.” This approach is consistent with the EPA’s existing policy
. The EPA is finalizing the proposed approach, where states have the option of conducting a technical analy sis for a nonattainment area considering the emissions controls required b y a regional cap
- and
- trade program, and demonstrating that compliance b y certain sources participating in the cap
- and
- trade program results in
a ctual emission reductions in the particular nonattainment area that are equal to or greater than the emission reductions that would result if RACT were applied to an individual source or source category within the nonattainment area. This approach is consi stent with the Court’s reasoning in NRDC v. EPA regarding the NO x SI P Call. Additionally , we note that in August 2013, the Court granted EPA’s request for voluntary vacatur of the CAIR
- RACT presumption for the 1997 ozone NAAQS. The approach we are finalizi ng is not inconsistent with the vacatur decision. The EPA is finalizing the proposed approach for VOC sources subject to MACT standards, such that states would be allowed to streamline their RACT analysis b y including an assessment of the MACT controls and how they relate to VOC RACT considerations . This approach is consistent with the EPA’s current policy
. The EPA is finalizing the proposed approach to provide states with the discretion to require bey ond
- RACT reductions from an y source, and that states hav e an obligation to demonstrate attainment as expeditiously as practicable. We believe it may be necessary*** E.O. 12866 Review

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Page 62 of 223 in some cases for states to achieve “bey ond RACT” reductions in order to demonstrate attainment as expeditiously as practicable. The EPA is not modifying existing guidance for meeting the 182(b)(2) RACT requirements for the 2008 ozone NAAQS through this action. There is scientific information available that indicates that in some locations ozone formation is NO x limited, and changes in anthropogenic VOC emissions will have little effect on ozone concentrations. However, the EPA is not prepared at this time to establish a specific definition of “negligible effect,” and believes that legal support for modifying the existing RACT guidance needs to be furthe r explored. States therefore will continue to conduct RACT determinations as they historically have. Additionally , we do not anticipate that an y current NO x - limited nonattainment areas will immediately need to develop substantive new VOC RACT SI P submissio ns. Therefore, we do not expect that retaining the current RACT guidance will have any near term impact on states or VOC sources in current NO x - limited nonattainment areas. The EPA notes that we may consider modifying the existing guidance in the future. T he EPA received potentially useful information from commenters regarding the definition of “negligible effect,” which we will consider in the future as we further assess whether to modify the existing RACT guidance. The EPA is finalizing the proposed appro ach that areas must implement RACT measures as expeditiously as practicable, but no later than January 1 of the 5th ye ar after the effective date of a nonattainment designation. For the nonattainment designations that were effective July

20, 2012, RACT measures (for areas where they are required) must be implemented by

January 1, 2017. This allows a comparable amount o f time for sources to*** E.O. 12866 Review

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Page 63 of 223 meet RACT requirements as originally anticipated under the 1990 CAA Amendments, and ensures that RACT measures are required to be in place no later than the last ozone season prior to the Moderate area attainment date o f July 20 , 2018. c. Comments and Responses Comment: Several commenters supported the proposed approach that in some cases, states may

conclude that sources already addressed b y RACT determinations for the 1
- hour and/or 1997 ozone NAAQS may not need to implement additional controls to meet the 2008 ozone NAAQS RACT requirement. Several other commenters generally did not support this conclusion. One commenter requested clarification regarding situations where a state may conclude that existin g RACT controls meet RACT for the 2008 ozone NAAQS. Response: The EPA generally agrees with the supporting comments. The EPA disagrees with the comments opposing the proposed approach. In areas previously subject to the RACT requirement under the 1
- hour and/or 1997 ozone NAAQS, states have previously

addressed the RACT requirement with respect to these NAAQS. We believe that, in some cases, a new RACT determination under the 2008 standard would result in the same or similar control technology as the initia l RACT determination under the 1
- hour or 1997 standard because the fundamental control techniques, as described in the CTGs and ACTs, are still applicable. We appreciate the commenter’s request for more information regarding the specific situations where this approach may be reasonable. In cases where controls were applied due to the 1
- hour or 1997 ozone NAAQS RACT requirement, the incremental emissions reductions from application of updated RACT controls may be small and,*** E.O. 12866 Review

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Page 64 of 223 therefore, the cost for advancing that small additional increment of reduction may not be reasonable. In contrast, a RACT analy sis for uncontrolled or partiall y controlled sources would be more likel y to find that updated RACT
- level controls under the 2008 ozone NAAQS are economically and technically

feasible. In portions of 2008 nonattainment areas where control technologies f or major sources or source categories were previousl y reviewed and controls applied to meet the RACT requirement under the 1
- hour or the 1997 o zone NAAQS , states should review and, if appropriate, accept the initial RACT analy sis as meeting the RACT requirements for the 2008 ozone NAAQS . Absent data or public comments indicating that the previous RACT determination is no longer appropriate, the s tate need not adopt additional SIP controls to meet the new RACT requirement for these sources. In such cases, the state’s SIP revision submitted after notice and comment should contain a certification, with appropriate supporting information (including co nsideration of new data), indicating that these sources are alread y subject to SIP
- approved requirements that still meet the RACT obligation. There are cases where the initial RACT anal ys is under the 1
- hour standard or the 1997 standard for a specific sour ce or source category concluded that no additional controls were necessary . In such cases, a new RACT determination is needed to consider whether more cost effective control measures have become available for sources that were not previously

regulated. A r e - anal ys is may determine that controls are now economicall y and technically feasible and are necessary to meet the RACT requirement. Please refer to the Response to Comments document for additional detail on this topic. Comment: A commenter expressed the concern that a nonattainment area
- wide weighted NO x averaging demonstration would exempt EGUs used primarily on high*** E.O. 12866 Review

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Page 65 of 223 electricit y demand day s from NO x control. The commenter also expressed that the exemption of HEDD EGUs from NO x control does not reduce NO x emissions when and where such reductions are necessary to attain the ozone NAAQS. Another commenter asserted that the EPA’s definition of RACT plainly requires each individual source to apply control technology to achieve the lowest emission limitation that each particular source is capable of meeting considering technology and economic feasibility . The commenter argued that substitution of area
- wide averaging for source
- specific RACT does not meet the language of section 182(b)(2) of the Act, which requi res SIPs for Moderate and above areas to require implementation of RACT “with respect to ... [a]ll VOC sources in the area covered b y an y CTG issued before November 15, 1990,” and

“ [a]ll other major stationary sources of VOCs that are located in the area.” 4 2 U.S.C. § 7511a(b)(2). The commenter argued that the EPA is supplanting these statutory directives with an area
- wide averaging program that allows some sources to avoid installing RACT controls. Response: The EPA’s existing policy recognizes that states can meet NO x RACT requirements b y submitting as part of their NO x RACT SIP submittal a demonstration that the weighted average NO x emission rate from sources in the nonattainment area subject to RACT achieves RACT
- level reductions. We note, however, that this policy does not include an exemption for HEDD EGUs from NO x control. Additionally , the EPA disagrees with the comment that “area
- wide averaging is not a legally

permissible method for compl yi ng with” RACT and that RACT requires reductions from “each and every source” in an area. The EPA believes that the statute, as interpreted b y the court in NRDC v. EPA, provides a state with the option of*** E.O. 12866 Review

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Page 66 of 223 demonstrating that its program achieves RACT level reductions by showing emission reductions greater than or equal to reductions that would be achieved through a source
specific application of RACT in the nonattainment area. NRDC v. EPA interprets the CAA as requiring that each nonattainment area must achieve “RACT
- level reductions,” which is to say

the reduction s that would be achieved “if RACT
- level controls were installed in the area.” 571 F.3d at 1258. In sum, n othing in the CAA or in NRDC v. EPA requires that “each and every” source in the area employ RACT or achieve RACT
- level reductions. Consistent with pre vious guidance, the EPA continues to believe that RACT can be met on average b y a group of sources within a nonattainment area rather than at each individual source. Therefore, states can show that SIP provisions for these sources meet the ozone RACT requi rement using the averaging approach. Comment: Several commenters expressed general support for the proposed policy that would allow states to demonstrate that compliance with a regional trading program by affected sources within a nonattainment area will s atisfy RACT requirements for those sources. Several commenters additionally expressed that it may

be appropriate for states to rely on a cap - and
- trade program that is limited to a nonattainment area for purposes of meeting RACT for sources located in the n onattainment area. Other commenters did not support the proposed approach. A few of these commenters expressed concerns that b y providing states with an option to rely on trading programs, the EPA is allowing for sources to turn off their controls in upwi nd states. Commenters additionally suggested that RACT should apply on an individual basis to every affected stationary

source in a nonattainment area. Commenters implied that the EPA should specificall y require controls to be operational at all times at these sources.*** E.O. 12866 Review

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Page 67 of 223 Response: The EPA appreciates, and generally agrees with, the supporting comments pertaining to the proposed policy allowing states to rel y on a regional cap
- and
trade program to comply

with RACT if they

provide an appropriate technical demonstration. The EPA also agrees that states may rely on a cap - and
- trade program that is limited to a nonattainment area for purposes of meeting RACT for sources located in the nonattainment area. The EPA disagree s, however, with those comment er s that say that states should not have the option to demonstrate that compliance with a regional trading program b y sources in a nonattainment area achieves RACT
- level reductions within the nonattainment area. In NRDC v
. EPA , the Court noted that a determination that RACT was satisfied b y compliance with a regional trading program might be permissible for an area if accompanied by a technical anal ys is demonstrating that the program in fact “results in greater emissions reduct ions in a nonattainment area than would be achieved if RACT
- level controls were installed in that area.” 32 In other words, the Court rejected the notion that a regional trading program intended to eliminate interstate transport of emissions consistent with section 110(a)(2)(D)(i) could automatically constitute the RACT
- level of control required by section 172(c)(1), but held open the possibility that an anal ys is could be conducted to determine whether such a program would result in the same, or higher level of emissions reductions in individual nonattainment areas. The EPA additionally

disagrees with any

implication by

the commenters that the proposal should address whether controls are required to be operational at all times at sources in the nonattainment area. The EPA’s NO x RACT guidance (Nitrogen Oxides Supplement to the General Preamble, 57 FR 55625; November 25, 1992) includes a
32 571 F.3d at 1258.*** E.O. 12866 Review

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Page 68 of 223 policy where states may

develop RACT programs that are based on ”area wide average emission rates.” Additional guidance on are a - wide RACT provisions is provided by the EPA’s January

2001 economic ince ntive program guidance titled, “ Improving Air Quality with Economic Incentive Programs.” Thus, the EPA’s existing policy recognizes that states may

demonstrate as part of their NO x RACT SIP submittal that the weighted average NO x emission rate from a group of sources in the nonattainment area subject to RACT meets NO x RACT requirements. Comment: The EPA received several supporting and opposing comments regarding whether the EPA should modify the RACT guidance to allow for states to consider the ozone air quality benefits of reductions in VOC emissions for purposes of RACT determinations. Supporti ng comments provided examples where photochemical modeling appears to show that in some areas VOC reductions have a limited effect on reductions in ozone concentrations. These commenters also provided information that may be useful in evaluating the potent ial definition of “negligible effect.” Several commenters also provided potential legal justifications for modifying the RACT guidance in this respect
. Response: The EPA recognizes that modification of the existing guidance on determining RACT could add flexibility that would be beneficial to the efficiency of ozone controls in some states. In addition, it appears that there is available science suggesting that oz one formation in some areas is NO x limited, such that changes in anthropogenic VOC emissions will have little effect on ozone concentrations. However, the EPA does not believe that the legal arguments provided b y the commenters are sufficient to address po tential statutory restrictions. The main legal argument presented*** E.O. 12866 Review

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Page 69 of 223 by commenters in support of flexibility is that the EPA has “discretion” to determine what constitutes “reasonably ” available control technology . However, the EPA may not have sufficient dis cretion to support this modification of the existing RACT guidance
. Section 182(b)(2) provides that SIPs must “require the implementation of reasonabl y available control technology” with respect to “ VOC sources.” It does not clearl y authorize consideration of whether technology that is “reasonabl y available” is also reasonabl y effective with respect to improving air quality or reducing ozone formation, and it does not specify

criteria for discerning a level of air qualit y improvement below which available t echnology does not need to be implemented. Comment: Some opposing comments raised equity concerns with modifying the RACT guidance, while other comments raised legal concerns. Several commenters stated the EPA has issued NO x waivers in the past under sect ion 182(f) and the proposed approach would appear to establish a VOC waiver scheme, which the commenters do not support and is not expressly provided b y the statute . Several commenters stated that the CAA requires RACT on all major sources of VOC in nonatt ainment areas and the commenters do not believe that the EPA has the authority to eliminate this requirement. One commenter also stated that not only has Congress made clear that section 182(b)(2)’s mandates for VOC RACT are not limited by any sort of air qualit y benefit test, but the plain meaning of “economic feasibility” does not have an ything to do with air quality benefits, citing several cases
. Response: Given these concerns about whether the CAA authorizes such an approach , and as is discussed above , the EPA is not at this time revising our long
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Page 70 of 223 standing RACT determination guidance. However, EPA may continue to explore this option and potential legal support for it in the future. Comment: The EPA received one supporting comment regarding the propose d approach that for VOC sources subject to MACT standards, states would be allowed to streamline their RACT analy sis by including a discussion of the MACT controls and considerations relevant to VOC RACT. The EPA received one additional comment suggesting that, before requiring states to appl y NO x RACT to all combustion sources, the EPA should study

certain MACT rules and specificall y recommend the SIP credit for federal MACT measures in SIP planning. Response: The EPA thanks the commenter for their support . Regarding the issue of whether to specifically recommend the SIP credit for federal MACT measures in SIP planning, the EPA is not planning at this time to develop specific recommendations for SIP credit for Federal MACT measures. Additionally , the commenter seems to imply that the EPA should not require compliance with RACT until such a study is completed. The EPA disagrees with the commenter. Regardless of whether or not the EPA conducts such a study , the RACT requirements remain requirements that must b e met under the CAA , whether through reliance on MACT or otherwise
. Comment: One commenter expressed concern that the EPA’s proposed requirement to have RACT in place by January 1, 2017, may

not provide enough time for implementation. The commenter noted that if the EPA needs to develop additional CTGs for the current ozone NAAQS , states may not have ample time to develop regulations that provide sufficient time for sources to implement RACT for sources covered b y additional CTGs.*** E.O. 12866 Review

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Page 71 of 223 Response: The EPA disagree s with the commenter that a requirement for RACT to be in place b y J anuary

1, 2017 for areas designated nonattainment effective July 20, 2012 (and all areas of the OTR) does not allow enough time for implementation. The EPA believes that the January 1, 201 7 , date allows a sufficient amount of time for states to make RACT determinations and for sources to meet RACT requirements on the time
table originally

anticipated under the 1990 CAA Amendments, and ensures that RACT measures are required to be in place throughout the last two ozone seasons prior to the Moderate area attainment date of December 31, 2018. Given the comment received, we wish to provide further clarification regarding the RACT implementation deadline. The EPA notes that the requirement to de velop a RACT SIP applies only

to nonattainment areas that are classified as Moderate or above ( i.e. , Serious, Severe, or Extreme). Therefore, for such areas that were designated effective July

20, 2012, RACT SI Ps are due within 2 y ears of the effective dat e of designation, b y July

20, 2014. Sources subject to RACT in those areas would then need to implement RACT by

January 1, 2017. 33 If an area is reclassified from Marginal to Moderate at some later date, then that area would become subject to a new RACT requirement, and the EPA would set new SIP submission and RACT compliance dates on a reasonable schedule that the Administrator will establish in the applicable notice and comment rulemaking reclassifying the area. For areas newl y redesignated to nonattainment, the RACT SIP is due 2 ye ars from the effective date of designation, and

33 We note that the RACT compliance date does not change relative to the RACT SIP submission. This compliance date is fixed, such that if a state submits a RACT SIP past the deadline, then sources would still have to comply with the RACT requirements by January 1, 2017.*** E.O. 12866 Review

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Page 72 of 223 the implementation deadline is January 1 st of the 5 th year after the effective date of designation. Additionally , the January 1, 2017 RACT implementation deadline, would not automatically

apply to sources covered b y future CTGs. If a new CTG is developed, all current Moderate or above areas would be required to revise their SIPs for the sources covered b y the CTG within the period set forth b y the EPA in issuing the CTG docume nt (see Section 182(b)(2) of the CAA ), which would occur through notice and comment rulemaking. This will give sources lead time to comply with the new requirement. Comment: With regard to the EPA’s proposed requirement to have RACT in place b y J anuary

1, 2017, one commenter asserted that it was not Congress’s intention to require another round of RACT revisions in the short period of time between ozone NAAQS revisions. The commenter claims the short period of time would not allow a facility to recoup the investment in the original pollution control before the requirement to reconsider if the next round RACT determinations requires newer controls. The commenter also believes that it would be burdensome for states to adopt new RACT SIPs and resubmit them for EPA approval. Response: The EPA disagrees with the commenter that Congress did not realize the implication that the 5
- ye ar NAAQS review cycle would potentially require new RACT determinations each time a NAAQS is revised. The EPA has offered flexibilities in applying the RACT requirements for areas that have previousl y met requirements for the 1
- hour or the 1997 8
- hour ozone NAAQS. 2. Reasonably Available Control Measures (RACM) a. Summary of the Proposal*** E.O. 12866 Review

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Page 73 of 223 The EPA proposed to continue to apply to the 2008 ozone NAAQS , existing RACM guidance that interprets the RACM provision to require a demonstration that the state has adopted all reasonable measures (including RACT) to meet RFP requirements and to demonstrate attainment as expeditiously as practicable an d thus that no additional measures that are reasonably available will advance the attainment date or contribute to RFP for the area. 34 , 35 , 36 The EPA also proposed that although states should consider all available measures, including those being implemented in other areas, a state must adopt measures for an area only if those measures are economically and technologically feasible and will advan ce the attainment date or are necessary for RFP. b. Final Action and Rationale The EPA is finalizing the proposed approach of continuing to apply existing RACM guidance to the 2008 ozone NAAQS, such that we interpret the RACM provision to require a demon stration that the state has adopted all reasonable measures (including RACT) to meet RFP requirements and to demonstrate attainment as expeditiously as practicable and thus that no additional measures that are reasonably available will advance the attainme nt date or contribute to RFP for the area. Additionall y the EPA is
34 “ State Implementation Plans; General Preamble for Proposed Rulemaking on Approval of Plan Revisions for Nonattainment Areas” 44 FR 20372 at 20375 (April 4, 1979). “State Implementation Plans; General Preamble for the Implementation of Title Iof the Clean Air Act Amendments of 1990; Proposed Rule.” 57 FR 13498 at 13560 (April 16, 1992). 35 “Guidance on the Reasonably Available Control Measures (RACM) Requirement and Atta inment Demonstration Submissions for Ozone Nonattainment Areas.” John S. Seitz, Director, Office of Air Quality Planning and Standards. November 30, 1999. http:// www.epa.gov/ttn/oarpg/t1/memoranda/revracm.pdf. 36 Memorandum of December 14, 2000, from John S . Seitz, Director, Office of Air Quality Planning and Standards, re: “Additional Submission on RACM from States with Severe One
- Hour Ozone Nonattainment Area SIPs.” http://www.epa.gov/ttn/caaa/t1/memoranda/121400_racmmemfin.pdf*** E.O. 12866 Review

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Page 74 of 223 finalizing the interpretation of the CAA requirements that states should consider all available measures, including those being implemented in other areas, and that a state must adopt measures for an area onl y if those measures are economically and technologicall y feasible and will advance the attainment date or are necessary for RFP. This interpretation has been upheld b y several courts. See , e.g. , Sierra Club v. EPA , et al., 294 F.3d 155 (D.C. Circuit, 2002). Significant tracts of land under federal management may also be included in nonattainment area boundaries. The role of fire in these areas should be assessed and emissions budgets developed in concert with those federal land managemen t agencies. Where appropriate, states may consider developing plans for addressing w ildland fuels in collaboration with land managers and owners. Information is available from the D epartment of Interior (DOI) and USDA Forest Service on smoke management programs and basic smoke management practices and may be considered as potential mitigation measures to lessen the impacts of wildfires. 37 Wildfire emissions are a component of background ozone 38 and can significantly contribute to periodic high ozone levels. 39 Besides their effect on air quality , wildfires pose a direct threat to public safet y – a threat that can be mitigated through management

37 USDA Forest Service and Natural Resources Conservation Service, Basic Smoke Management Practices Tech Note, October 2011, http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1046311.pdf
. 38 Jaffe, DA; Wigder, NL. (2012). Ozone production from wildfires: A critical review. Atmos Environ 51: 1
- 10. http://dx.doi.org/10.1016/j.atmosenv.2011.11.063 39 Emery , C; Jung, J; Downey , N; Johnson, J; Jimenez, M; Yarwood, G; Morris, R. (2012). Regional and global modeling estimates of policy relevant background ozone o ver the United States. Atmos Environ 47:206
- 217. http://dx.doi.org/10.1016/j.atmosenv.2011.11.012*** E.O. 12866 Review

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Page 75 of 223 of wildland vegetation. Attempts to suppress wildfires have resulted in unintended consequences, including increased risks to both humans and ecos ys tems. 40 The use of wildland prescribed fire can influen ce the occurrence of catastrophic wildfires which may help manage the contribution of wildfires to background ozone levels and periodic peak ozone events. Additionally prescribed fires can have benefits to those plant and animal species that depend upon natural fires for propagation, habitat restoration, and reproduction, as well as my riad ecos ys tem functions (e.g., carbon sequestration). The EPA understands the importance of prescribed fire which mimics a natural process necessary to manage and maintain fi re - adapted ecosy stems and climate change adaptation, while reducing risk of uncontrolled emissions from catastrophic wildfires, and is committed to working with federal land managers, tribes, and states to effectivel y manage prescribed wildland fire use to reduce the impact of wildfire related emissions on
ozone. If wildfire impacts are significant, contributing to exceedances of the standard, states should consider RACM for this source. F ires play an important ecological role across the globe, benefiting those plant and animal species that depend upon natural fires for propagation, habitat restoration, and reproduction. Fires are one tool that can be used to reduce fuel load, unnatural understo ry , and tree density , helping to reduce the risk of catastrophic wildfires. The use of prescribed fire can influence the occurrence of catastrophic wildfires which may reduce the probability

of fire
- induced ozone impacts

40 In deed, “Fire policy

that focuses on [wildfire] suppression only , delay s the inevitable, promising more dangerous and destructive future...fires.” Stephens, SL ; Agee, JK; Fule, PZ; North, MP; Romme, WH; Swetnam, TW. (2013). Managing Forests and Fire in Changing Climates. Science 342:41
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Page 76 of 223 and subsequent public health effect s. RACM for wildfire may include addressing the wildland fuels through fuels management and including the use of prescribed fire in sy stems that are ecologically fire dependent. Where appropriate, states may consider developing plans for addressing wildlan d fuels in collaboration with land managers and owners. RACM for prescribed fires should also be considered. Information is available from DOI and the USDA Forest Service on smoke management programs and basic smoke management practices and may be consi dered when determining RACM for prescribed fires. RACM must be determined for each area on a case
- by
- case basis. c. Comments and Responses Comment: One commenter suggested amending RACM guidance to follow the
same common - sense approach proposed for RACT; i.e. , if studies show that reducing anthropogenic VOC emissions in an area has little effect on ground
- level ozone concentrations, RACM analy ses should not be required for that pollutant. Response: We note that existing EPA guidance alread y provides some assistance to states with identifying the ty pe of measures that might be considered for RACM ( See General Preamble, 57 FR 13549, April 16, 1992 ). If a state demonstrates that implementation of VOC emission reduction measures will not contribute to an area’ s reasonable further progress or to attainment, then additional control of VOC emissions does not need to be further considered for RACM purposes
. Thus, the EPA concludes that it need not amend RACM guidance to address this comment. E. Does the 2008 ozone NAAQS result in any new vehicle I/M programs? Based on current designations and classifications for the 2008 ozone NAAQS, no new vehicle I/M programs are currentl y required. In the proposal for this rulemaking , the*** E.O. 12866 Review

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Page 77 of 223 EPA provided information on potential w ay s a state could design and implement an I/M program , either because it was required to implement a program due to a future reclassification for the 2008 ozone NAAQS , as a result of a nonattainment designation and classification under a future standard, o r because an area decided to implement an I/M program even though it was not otherwise required. That discussion is not repeated here; therefore, please refer to the proposal (78 FR 34194
- 34196). Although the EPA is finalizing its proposal to revise the I/M SIP due date to align it with other SIP due dates (see section III.A of this preamble), no other changes are being made to the EPA's existing regulations and guidance on vehicle I/M programs. F. How does transportation conformity apply to the 2008 ozone NAAQS? 1. W hat is transportation conformity? Transportation conformity is required under CAA section 176(c) to ensure that transportation plans, transportation improvement programs (TIPs) and federall y supported highway

and transit projects are consistent with (“conform to”) the purpose of the SIP. Conformity

to the purpose of the SIP means that transportation activities will not cause new air quality

violations, worsen existing violations, or delay timel y attainment of the relevant NAAQS or interim reducti ons and milestones. Transportation conformity applies to areas that are designated nonattainment, and to those former nonattainment areas that have been redesignated to attainment since 1990 and have a CAA section 175A maintenance plan (“maintenance areas” ) for transportation
- related criteria pollutants: carbon monoxide, ozone, nitrogen dioxide and particulate matter. The EPA’s Transportation Conformity Rule (40 CFR 51.390 and p art 93, subpart A) establishes the criteria and procedures for determining wheth er transportation*** E.O. 12866 Review

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Page 78 of 223 activities conform to the SIP. The EPA first promulgated the Transportation Conformity Rule on November 24, 1993 (58 FR 62188), and subsequently published several amendments. For example, the EPA published a final rule on July 1, 2004 (69 FR 40004) that provided transportation conformity procedures for state and local agencies under the 1997 ozone NAAQS, among other things. Parties involved in implementing transportation conformity include state and local transportation and air quality age ncies, metropolitan planning organizations (MPOs) and the U.S. Department of Transportation (the DOT) (40 CFR 93.102). For further information on transportation conformity rulemakings, policy

guidance and outreach materials, see the EPA’s website at http:/ /www.epa.gov/otaq/stateresources/transconf/index.htm
. 2. W hen would transportation conformity apply to areas designated nonattainment for the 2008 ozone NAAQS? Transportation conformity for the 2008 ozone NAAQS applied 1 y ear after the effective date of no nattainment designations for the NAAQS . CAA section 176(c)(6) and 40 CFR 93.102(d) provide a 1
- ye ar grace period from the effective date of an initial designation of nonattainment before transportation conformity applies in the area for a particular pollut ant and standard. For areas designated nonattainment effective July 20, 2012, the 1
- year grace period ended on July 20, 2013. For an y area subsequently redesignated to nonattainment (from unclassifiable or attainment), the 1
- ye ar grace period runs from the effective date of the redesignation. The grace period requirements differ depending on whether the nonattainment area is a metropolitan area or an isolated rural
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Page 79 of 223 In metropolitan areas, which are defined as urbanized areas that have a population greater than 50,000 and a designated MPO responsible for transportation planning per 23 U.S.C. 134, within 1 y ear after the effective date of the nonattainment designation, the area’s MPO and the DOT must make a conformity determination with regard to the
area ’s transportation plan and TIP for the 2008 ozone NAAQS under the transportation conformity

regulations ( 40 CFR 51.390 and part 93, subpart A) . The conformity requirements for “ donut areas, ” 41 including the application of the 1
- ye ar conformity grace period , are generall y the same as those for metropolitan areas. If, at the end of the grace period, the MPO and the DOT have not made a transportation plan and TIP conformity determination for the relevant pollutant and standard, the area would be in a conformity “lapse.” During a conformity lapse, onl y certain projects can receive additional federal funding or approvals to proceed. The practical impact of a conformity lapse will vary from area to area. Isolated rural nonattainment areas are areas that do not co ntain or are not part of an MPO (40 CFR 93.101). Conformity requirements for isolated rural nonattainment areas can be found at 40 CFR 93.109(g). An isolated rural area would be required to make a conformity

determination only

at the point when a new trans portation project needs funding or approval. This point may occur significantly

after the 1
- ye ar grace period has ended. See the EPA’s July 1, 2004, final rule for further background on how

41 For the purposes of transportation conformity , a “donut” area is the geographic area outside a metropolitan planning are a boundary , but inside a designated nonattainment or maintenance area boundary that includes an MPO (40 CFR 93.101).*** E.O. 12866 Review

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Page 80 of 223 the EPA has implemented this conformity grace period for the 1997 ozone NAAQS in metropolitan, donut and isolated rural areas (69 FR 40008
- 40014). 42 3. Does transportation conformity apply for the 1997 ozone NAAQS once that NAAQS is revoked? The CAA only

requires transportation conformity in areas that are designated
nonattainment or maintenance for a given pollutant and standard. Therefore, transportation conformity would no longer appl y for purposes of the 1997 ozone NAAQS as of the time that standard (and thus an area’s designation for that standard) is revoked. Accordi ngl y, existing 1997 ozone NAAQS nonattainment and maintenance areas, regardless of their designation for the 2008 ozone NAAQS, would no longer be required to demonstrate transportation conformity for the 1997 ozone NAAQS after the 1997 ozone NAAQS is revok ed. The D.C. Circuit ruled that the EPA violated the CAA when it attempted to revoke the 1997 ozone NAAQS for transportation conformit y purposes only in the Classifications Rule for the 2008 ozone NAAQS. The attempted revocation would have bec o me effective on July 20, 2013, 1 y ear after the effective date of designations for the 2008 ozone NAAQS. (77 FR 30160) The D.C. Circuit Court of Appeals said nothing to suggest that the EPA could not revoke the standard for all purposes, as it is doi ng today
. See South Coast, (upholding revocation of standard so long as anti
- backsliding measures are introduced)
. Under our current Transportation Conformity Rule, the latest approved or adequate emission budgets for a previous ozone NAAQS ( i.e. , the 1997 or the 1
- hour ozone NAAQS) would continue to be used in conformity determinations for
42 Also, see the EPA’s transportation conformity website for more information, including EPA’s “Transportation Conformity Guidance for 2008 Ozone NAAQS Nonattainment Areas” at: http://

www.epa.gov/otaq/stateresources/transconf/2008naaqs.htm
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Page 81 of 223 the 2008 ozone NAAQS until emission budgets are established and found adequate or are approved for the 2008 ozone NAAQS. ( 77 FR 14981
- 2 ) 4. W hat impact will the implementation of the 2008 ozone NAAQS have on a state’s Transportation Conformity SIP? States with previously

approved Transportation Conformity SIPs should not need to revise those SIPs, unless they need to do so to ensure that existing state regulati ons apply in areas newl y designated nonattainment for the 2008 ozone NAAQS. However, if this is the first time that transportation conformity will apply

in a state, such a state is required to submit a SIP revision within 12 months of the effective date of the nonattainment designation that covers the three specific transportation conformity requirements that are delineated in CAA section 176(c)(4)(E). These specific requirements are consultation procedures and written commitments to control or mitigation m easures associated with conformity determinations for transportation plans, TIPs or projects. 40 CFR 51.390. Additional information and guidance can be found in EPA’s “Guidance for Developing Transportation Conformity State Implementation Plans” ( http://ww w.epa.gov/otaq/stateresources/transconf/policy/420b09001.pdf ). G. What requirements for general conformity apply to the 2008 ozone NAAQS?? 1. Summary of the Proposal The EPA did not propose to make revisions to the General Conformity Regulations. 43 However, we did recommend that as areas develop their SIPs for the 2008

43 In formation on what federal actions are covered and how to demonstrate conformity are found in 40 CFR part 93 subpart B. On March 24, 2010, former Administrator L isa P. Jackson signed the General Conformity Final Rule “ Revisions to the General Conformity Regulations, ” which was published April 5, 2010 (75 FR 17254

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Page 82 of 223 ozone NAAQS, state and local air qualit y agencies work with federal agencies with major facilities that are subject to the General Conformity Regulations to establish an emissions bud get for those facilities in order to facilitate future conformity determinations. Significant tracts of land under federal management may also be included in nonattainment area boundaries. The role of fire in these areas should be assessed and emissions budgets developed in concert with those federal land management agencies. Where appropriate, states may consider developing plans for addressing wildland fuels in collaboration with land managers and owners. Information is available from DOI and USDA F orest Service on the ecological role of fire and on smoke management programs and basic smoke management practices and may be considered as potential mitigation measures to lessen the impacts of wildfires
. 44 We also stated in the proposal that for the ozone precursors VOC and NO x , the existing de minimis emission levels contained in 40 CFR 93.153(b)(1) will continue to apply to the 2008 ozone NAAQS. We also stated in the proposal that g eneral conformity for the 2008 ozone NAAQS would apply 1 y ear after the effective date of nonattainment designations for that NAAQS because section 176(c)(6) provides a 1
- ye ar grace period from the effective date of initial designations before general conformity determinations are required in areas newl y designated nonatta inment for a particular pollutant and standard. In such areas we encourage states to consider in an y baseline inventory used and/or submitted to include emissions
information on the gen eral conformit y program is available at http://www.epa.gov/air/genconform/
. 44 USDA Forest Service and Natural Resources Conservation Service, Basic Smoke Management Practices Tech Note, October 2011, http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1046311.pdf
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Page 83 of 223 expected from projects to general conformit y, including emissions from wildland fire that may be reasonabl y expected in the area . Since we proposed to revoke the 1997 ozone NAAQS at the time the final SIP Requirements Rule is published in the Federal Register , we stated in the proposal that general conformit y requirements under the 1997 ozone NAAQS would end after the 2008 ozone NAAQS general conformity requirements begin. 2. Final Action and Rationale The EPA is taking no action to revise General Conformity Regulations. For reasons explained in section IV of this rule , we are revoking the 1997 ozone NAAQS 30 day s after publication of this final rule. Accordingly , the g eneral c onformity requirements for the 1997 ozone NAAQS will end when the NAAQS is revoked , and the general conformity

requirements for the 2008 ozone NAAQS are applicable 1 y ear after the effective date of nonattainment designations for the 2008 NAAQS
. 45 The EPA believes the existing General Conformity Regulations (40 CFR p art 93) remain appropriate for the 2008 ozone NAAQS. States with approved general conformity S IPs should not need to revise their SIPs unless they need to do so to ensure they are consistent with the April 5, 2010, revisions to the general conformity regulations or to ensure the existing regulations apply in the appropriate newly designated area s. H. What are the requirements for contingency measures in the event of failure to meet a milestone or to attain? 1. Summary of Proposal

45 For areas designated in 2012, the effective date was July 20, 2013.*** E.O. 12866 Review

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Page 84 of 223 The EPA proposed that the contingency measures required for Moderate and above areas under CAA sections 172(c)(9) and 182(c)(9) must provide for the implementation of specific measures if the area fails to attain or to meet any applicable milestone. These measures must be submitted for approval into the SIP as adopted measures that would take effect without further rulem aking action b y the state or the Administrator upon a determination that an area failed to attain or to meet the applicable milestone. Per the EPA guidance, contingency measures should represent 1
- ye ar’s worth of progress, amounting to reductions of 3 perc ent of the baseline emissions inventory for the nonattainment area, which would be achieved while the state is revising its plans for the area. 46 Regarding the content of the contingency measures, the EPA’s prior guidance specifies that some portion of the contingency measures must include VOC reductions. As explained in the proposal, this previous limitation is no longer necessary in all cases. In particular, Moderate and above areas that have completed the initial 15 percent VOC reduction required b y C AA section 182(b)(1)(A)(i), can meet the contingency measures requirement based entirely on NO x controls if that is what the state’s analy ses have demonstrated would be most effective in bringing the area into attainment. There would be no minimum VOC requir ement. Also, the EPA proposed continuing its long
- standing policy that allows promulgated federal measures to be used as contingency measures as

46 See the April 16, 1992 General Preamble section III.A.3.c (57 FR 13498 at 13511).*** E.O. 12866 Review

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Page 85 of 223 long as they

provide emission reductions in the relevant y ears in excess of those needed for attainment or RFP. 47 The EPA also proposed an implementation approach for Extreme nonattainment areas whereb y plan provisions meeting the requirements of section 182(e)(5) (referred to as the “black box”) , including the requirements concerning contingency measure s, therein, may satisfy the section 172(c)(9) and 182(c)(9) contingency measure requirements for the area provided the state has alread y adopted all reasonable candidate measures in the applicable SIP to satisfy RACM , RFP , and all other requirements necessary for atta inment in the area
. 2. Final Action and Rationale The EPA is finalizing the proposed requirements that contingency measures must be submitted for approval into the SIP as required by the CAA and must provide for the implementation of specific measures with out an y further rulemaking action if the area fails to attain or meet an y applicable milestone , with limited exceptions for Extreme nonattainment areas rel yi ng on plan provisions approved under section 182(e)(5), as discussed below . Regarding content of th e 1
- ye ar’s worth of emissions covered b y the contingency

measures, the EPA is finalizing its proposal to allow the 3 percent emissions reductions of the contingency measures, to be based entirel y on NO x controls if the area has completed the initial 15 per cent ROP VOC reduction required by CAA section 182(b)(1)(A)(i) and the state’s anal ys es have demonstrated that NO x substitution would be most effective in bringing the area into attainment.

47 See Louisiana Environmental Action Network (LEAN) v. EPA, 382 F.3d 575 (D.C. 2004).*** E.O. 12866 Review

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Page 86 of 223 The EPA will continue to allow the use of federal measures provid ing ongoing reductions into the future to be used meet contingency measure requirements for the 2008
o zone NAAQS , consistent with the EPA’s longstanding policy . T he EPA has previousl y approved the use of federal measures to meet contingency measure require ments in actions approving 1
- hour and 8
- hour ozone SIPs. With respect to Extreme ozone nonattainment areas, section 182(e)(5) allows the agency to exercise discretion in approving Extreme area attainment plans that rel y, in part, on the future development of new control technologies or improvements of existing control technologies , where certain conditions are met . This discretion can be applied as long as the state has demonstrated that: all reasonably available control measures, including RACT, have been included in the plan; the area’s RFP demonstration during the first 10 y ears after designation does not rel y on anticipated future technologies; and the state has submitted enforceable commitments to timely develop and adopt contingency

measures to be implemented i f the anticipated future technologies do not achieve planned reductions. The EPA is finalizing its proposal to allow states to submit , for Extreme nonattainment areas, enforceable commitments to develop and adopt contingency

measures meeting the requirements of 182(e)(5) to satisfy the requirements for both attainment contingency measures in sections 1 72(c)(9) and 182(c)(9). These enforceable commitments must obligate the state to submit the required contingency measures to the EPA no later than three y ears before any applicable implementation date , in accordance with section 182(e)(5). 48 We note that th is does not, however, relieve states

48 For example, where a state intends to rely on section 182(e)(5) commitments to satisfy the section 182(c)(9) contingency measure requirement for an RFP milestone in y ear*** E.O. 12866 Review

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Page 87 of 223 from obligations to submit contingency plans as required by

sections 172(c)(9) and 182(c)(9) for periods in the first 10 y ears after designation
. 3. Comments and Responses Comment : Commenters urged the EPA to provide fl exibility to states when adopting, subject to EPA approval, contingency measures into the SIP that are read y for implementation should the area fail to either meet milestones or attain. Commenters requested that the EPA allow air quality improvement measur ements to be taken into consideration for purposes of evaluating the level of emission reductions necessary to meet the contingency

measure requirements when providing “approximately” 1 ye ar’s worth of progress for contingency measures. Commenters indicate d that a similar air quality improvements approach has been used in approving PM 2.5 contingency measures. Response : The EPA’s long
- standing interpretation is that a 3 percent emissions reduction from the RFP baseline, rather than a specific ozone concentration improvement, is the minimum contingency measure adoption requirement under subpart 2 . The EPA did not propose to alter this guidance. However, we note that if the contingency

measures are ever triggered for an area, states may take air quality considerations into account in determining whether a subset of measures amounting to less than 3 percent emissions reduction are all that is necessary to be implemented to cure the identified failure. 49 The implementation of PM 2.5 NAAQS is governed b y statutory and regulatory

requirements that are separate from , and not identical to , ozone 202 2, the commitments must obligate the state to submit adopted contingency measures to the EPA no later than 2019. ( i.e., three ye ars before RFP contingency measures for 2022 would be implemented. 49 See “Guidance for Growth Factors, Projections, and Control Strategies for the 15 Percent Rate
- of

- Progress Plans,” U.S. EPA, March 1993, page 83 (EPA
- 452/R
- 93/002).*** E.O. 12866 Review

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Page 88 of 223 implementation and provide flexibility for states to consider the degree of air quality improvement that may

be needed in developing RFP plans and contingency measures. Comment : Several commenters supported, and no commenters objected to using section 182(e)(5) authority to approve contingency measure plans for Extreme nonattainment areas where the attainment plan is based on development of new or improved control measures. Response : We appreciate the supportive comments. We recognize that all areas must meet the contingency plan requirements of sections 172(c)(9) and 182(c)(9). We agree that CAA section 182(e)(5) provides the agency discretion to approve an Extreme
are a attainment plan that relies, in part, on the future development of new control technologies or improvements of existing control technologies. This authority can be exercised as long as the state has demonstrated that: all reasonabl y available control
mea sures, including RACT, have been included in the plan; the area’s RFP demonstration during the first 10 y ears after designation does not rely on anticipated future technologies; and the state has submitted enforceable commitments to timely develop and adop t contingency

measures in the event that anticipated future technologies do not achieve planned reductions. Comment : One commenter argued that an Extreme nonattainment area seeking to rely on the section 182(e)(5) “black box” should be required to demonstrate that it has adopted all feasible controls, even if they do not advance attainment by a year and regardless of whether they constitute “reasonably

available control measures,” and that the EPA should “change its interpretation of RACT and RACM, which currently allows areas to avoid adopting and implementing feasible measures.”*** E.O. 12866 Review

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Page 89 of 223 Response : The EPA believes that both i ts long
- standing interpretation of RACM and its focus on whether control measures are “reasonably available” provide an appropriate framework for determining when to exercise the discretion provided by section 182(e)(5). As noted in the proposal, the deter mination of whether a SIP contains all RACM requires an area
- specific anal ys is establishing that there are no additional economicall y and technically feasible control measures (alone or cumulatively) that will advance the attainment date b y 1 year. This re quires close review of any measure that a commenter identifies as reasonabl y available for implementation in the area in light of local circumstances, and of measures being implemented in other states. 78 FR 34187, at 34194 (June 6, 2013). This interpretat ion of RACM has been upheld in court ( e.g. , Sierra Club v. EPA , 294 F
. 3d 155, 162
- 163 (D.C. Cir. 2002)). Thus, the EPA believes that it is appropriate to require that an area seeking to rely on the anticipated development of new technology

demonstrate that its plan includes all control measures that come within this definition of “reasonabl y available.” The EPA does not believe it is necessary for an area to demonstrate the use of measures that go bey ond that definition in order to meet contingency

measure requirements. I . How do the NSR requirements apply for the 2008 ozone NAAQS? 1. Major NSR R equirements for the 2008 O zone NAAQS The NSR programs established in parts C and D of title Iof the CAA contain specific requirements for the preconstruction revie w and permitting of new or modified major stationary

sources of air pollutants. In attainment and unclassifiable areas outside the OTR, the requirements under part C appl y for the prevention of significant deterioration ( PSD ) program. In nonattainment area s and throughout the OTR, the*** E.O. 12866 Review

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Page 90 of 223 requirements under part D apply for the nonattainment NSR program. We commonly refer to the PSD and nonattainment NSR programs together as the “major NSR programs.” The regulations for the major NSR programs are contained in 40 CFR 51.166 and 52.21 for PSD, and 51.165, 52.24 and part 51, Appendix S for nonattainment NSR. Among other things, in unclassifiable and attainment areas outside of the OTR, the PSD program requires a new major source, or a major modification to an exis ting major source, to obtain a permit that satisfies PSD requirements, including the application of best available control technology (BACT) for “each pollutant subject to regulation under [the CAA],” conducting an air qualit y impact analysis, and compl yi n g with requirements related to the protection of Class Iareas. As part of the required air quality impact anal ys es, s ection 165(a)(3) of the CAA provides that the owner or operator of a proposed facility must, among other things, demonstrate that “emissio ns from construction or operation of such facilit y will not cause, or contribute to, air pollution in excess of any ... national ambient air quality standard in an y air control region.” The EPA has generall y interpreted this statutory requirement , and the co rresponding regulations implementing EPA’s federal PSD permitting program at 40 CFR 52.21(k) and establishing minimum requirements for PSD programs approved into SIPs at 40 CFR 51.166(k) , to include a demonstration for an y NAAQS that is in effect at the time a final permit decision is issued. 50 See, e.g. , 73 FR

50 The EPA received comments relating to statements in the proposal about its discretion to grandfather permit applications in appropriate circumstances. Since this NAAQS has been in effect since 2008, the EPA is not adding a grandfathering provision in this final rule and those comments are discussed further in the Response to Comments document.*** E.O. 12866 Review

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Page 91 of 223 28321, 28324, 28340 (May 16, 2008); 78 FR 3253 (Jan. 15, 2013); Memorandum from Stephen D. Page, Director, Office of Air Quality Pl anning & Standards, entitled “Applicability

of the Federal Prevention of Significant Deterioration Permit Requirements to New and Revised National Ambient Air Quality Standards,” to the EPA Regional Air Division Directors and Deputies (April 1, 2010). In the proposal, the EPA indicated that, since the May 27, 2008 , effective date of the 2008 ozone NAAQS, permit applications for new major stationary sources and major modifications have been subject to the PSD program requirements for ozone under two sets of circumstances: F irst, prior to the designation of areas for the 2008 ozone NAAQS, sources locating in areas designated attainment or unclassifiable for the 1997 ozone NAAQS; and second , on and after the July 20, 2012 , effective date of area designations f or the 2008 ozone NAAQS, sources locating in areas designated as attainment or unclassifiable for both the 1997 and 2008 ozone NAAQS. If, however, an area was designated attainment or unclassifiable for the 2008 ozone NAAQS on and after July 20, 2012 , but was designated nonattainment for the 1997 ozone NAAQS, consistent with the PSD regulations at 40 CFR 51.166(i)(2) and 52.21(i)(2), the nonattainment designation would require application of nonattainment NSR for permits issued to new and modified sources l ocating in that area that trigger major NSR requirements for ozone until the revocation of th e 1997 ozone NAAQS is effective. In this rulemaking , the EPA is revoking the 1997 ozone NAAQS for all purposes . Accordingl y, as explained in section IV
. A of this preamble, as of 30 day s after the publication of this rule in the Federal Register , the area designations for the 1997 ozone NAAQS will no longer be considered current designations; thus, all areas designated attainment for the 2008 ozone NAAQS*** E.O. 12866 Review

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Page 92 of 223 wi ll be subject to PSD requirements
. In the proposal, the EPA explained that this result was based on its interpretation of the PSD regulations at 40 CFR 51.166(i)(2) and 52.21(i)(2), but recognized that th o se provisions d id not expressly say that a nonattai nment designation for a revoked standard does not trigger the exemption from PSD requirements contained in those provisions. 78 FR 34216
- 17. Accordingl y, the EPA requested comment on whether amendment of 40 CFR 51.166(i)(2) and 52.21(i)(2) is necessary to achieve that outcome and on how such an amendment, if an y, should be worded. After additional consideration, we believe there is a need for us to amend these provisions to further clarify the application of the exemption they contain . Therefore, the EPA is amending its PSD regulations at 40 CFR 51.166(i)(2) and 52.21(i)(2) as a logical outgrowth of the proposal and the submitted comments to clarify that historical designations for a revoked NAAQS should not be considered in determining whether PSD requireme nts appl y for that pollutant once the revocation becomes effective in an
area. For an y area that is designated nonattainment for the 2008 ozone NAAQS, the historical designations and classifications resulting from the revoked 1997 ozone NAAQS will continue to serve to identify nonattainment NSR anti
- backsliding requirements ( i.e. , major source thresholds and emissions offset ratios) that need to be taken into account in issuing nonattainment NSR permits to major stationary sources and major modifications. 51 As indicated previousl y , the designations and classifications for the revoked standard should not be regarded as current designations and classifications

51 Inthis final rule, the anti
- backsliding re quirements for nonattainment NSR are codified in 40 CFR 51.1105 (f), and are described in Section IV.B of this preamble . The*** E.O. 12866 Review

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Page 93 of 223 once the revocation takes effect. For example, in implementing the emissions offset requirements for nonattainment NSR, offset ratios based on the classification for the revoked standard, to the extent more stringent than the ratios for the 2008 ozone NAAQS classification, must be used for anti
- backsliding purposes. However, for purposes of determining wh ether a prospective offset can be obtained from a nonattainment area other than the one in which a new or modified source would be located, the requirements under section 173(c)(1) of the CAA must be satisfied. Section 173(c)(1) requires, in part, that the nonattainment area from which the offset is obtained must have “an equal or higher nonattainment classification than the area in which the [new or modified] source is located....” After the revocation takes effect, the historical classification for the revo ked NAAQS, to the extent that it is lower than the classification in the nonattainment area where a new or modified source would be located, would not preclude obtaining the offset from that area, so long as (1) the current classification for the ozone NAA QS for that area is equal to or higher than the current classification of the nonattainment area where the new or modified source is locating and (2) the other requirements under section 173(c)(1) of the CAA are satisfied. Some states may

have already

in their SIP a nonattainment NSR program consistent with part D of the CAA that can be applied to new nonattainment areas. In such situations , permitting authorities should have begun appl yi ng the nonattainment nonattainment NSR regulations at 40 CFR 51.165 have been amended in this final rule to add new paragraph (a)(12), which references those anti
- backsliding requirements. Also, as proposed, a new section VII has been added to Appendix S to set forth the anti
backsliding requirements that must be followed when states issue nonattainment NSR permits under that Ruling.*** E.O. 12866 Review

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Page 94 of 223 NSR requirements in permitting actions for new and modified major sources that trigger major source permitting requirements for ozone in new nonattainment areas starting from the effecti ve date of the 2008 ozone designations (July 20, 2012). For a newl y designated (or redesignated) nonattainment area for the 2008 ozone NAAQS in a state with a SIP that specifically lists the areas in which nonattainment NSR requirements under part D apply , or in a state that currentl y has no approved nonattainment NSR program, there will be an interim period between the July 20, 2012 designation date and the date when the EPA approves the state’s amended SIP, which must be revised to adequately address the nonattainment NSR requirements for the 2008 ozone NAAQS contained in this final rule. In the proposal, we explained that during this interim period, nonattainment NSR requirements for the 2008 NAAQS are governed b y the EPA’s Emission Offset Interpretative Ruling codified in Appendix S to 40 CFR part 51. Among other things, in general, Appendix S requires new or modified major sources in nonattainment areas to meet the lowest achievable emission rate (LAER) and obtain sufficient offsetting emissions reductio ns to assure that the new or modified major sources will not interfere with the area’s progress toward attainment. In addition, a new section VII of Appendix S has been added as part of this final rule to set forth the anti
backsliding requirements that mu st be addressed in order to issue a nonattainment NSR permit under Appendix S. That language for section VII is being finalized with only minor modifications to what was proposed. Readers should refer to 40 CFR part 51, Appendix S for a better understandin g of the Appendix S permitting requirements. In the proposal, the EPA explained that the time period for the NSR waiver provision contained in section VIof Appendix S, enabling permitting authorities in*** E.O. 12866 Review

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Page 95 of 223 specified circumstances to issue nonattainment NSR permits that do not require LAER or emissions offsets as are otherwise required under section IV of appendix S, was limited by the court’s ruling in NRDC v. EPA , 571 F.3d 1245 (D.C. Cir. 2009). The court’s ruling was the result of a petition filed in respo nse to the EPA’s Phase 2 Rule for the 1997 ozone NAAQS in which the EPA revised 40 CFR 52.24(k). The revision to paragraph (k) eliminated language stating that if a nonattainment area did not have an approved nonattainment NSR program within 18 months afte r designation, Appendix S would no longer appl y and a construction ban would appl y instead. 70 FR 71612 (November 29, 2005). The effect of the revision was to extend the applicability of Appendix S, including the section VI waiver provision, to cover the f ull period from the date of designation to the date on which the EPA approved the nonattainment NSR SIP for a new NAAQS
. In NRDC v. EPA (571 F.3d 1245 (D.C. Cir. 2009)), the court vacated “the elimination of the 18
- month time limit for NSR waivers under Appendix S” on the ground s that it violated section 172(e) of the CAA (571 F.3d at 1276). As a result of the court’s vacatur of the extension of the 18
- month time limit for section VI of Appendix S, no section VI waivers may be granted bey ond 18 months from the date of designation for any NAAQS
. Several commenters requested that the EPA clarify how the court’s decision affects the implementation of Appendix S as an interim nonattainment NSR program. While most commenters understood that the vacatur applied o nly to the removal of the 18
- month deadline for the section VI waiver, one commenter seemed to interpret the vacatur to appl y to appendix S in its entirety
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Page 96 of 223 To clarify , there is now a distinction between the length of time during which waivers may

be granted under section VI of Appendix S and the length of time the remainder of Appendix S applies as an interim nonattainment NSR program. No section VIwaivers may

be granted bey ond 18 months from the date of designation. The remainder of Appendix S, however, is not subject to an 18
- month time limitation. It will remain as the basis for air agencies to issue nonattainment NSR permits in new ozone nonattainment areas until the EPA approves a state’s nonattainment NSR program for the 2008 ozone NAAQS under the SIP for the area. Specificall y, section IV of Appendix S contains preconstruction requirements for proposed sources and modifications, which reflect the requirements contained in part D of the CAA for ozone nonattainment areas. The r equirements in section IV should be met consistent with the anti
- backsliding requirements contained in new section VII of Appendix S. 2. Offset Requirements and Policy To satisfy requirements under section 173 of the Act , new and modified major sources in nonattainment areas must secure emissions reductions ( i.e. , “offsets”) to compensate for a proposed emissions increase. Offsets are generated b y em issions reductions that meet specific creditability criteria set forth by

the SIP consistent with EPA regulat ions. See, 40 CFR 51.165(a)(3)(ii)(A)
- (J) and part 51 Appendix S section IV .C. 52 One commenter suggested that nonattainment NSR major source construction and major modification offsets should be available outside the nonattainment area ( from

52 See also , the EPA’ s “Improving Air Quality with Economic Incentive Programs” document at http://www.epa.gov/region07/air/nsr/nsrmemos/eipfin.pdf . For additional memoranda and guidance documents, see http://www.epa.gov/region7/air/nsr/nsrindex.htm
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Page 97 of 223 attainment are as) due to the possibility that new sources would develop in attainment areas in close proximity

to the boundary

of the ozone nonattainment area with subsequent impact on the nonattainment area. Further, the commenter seemed to suggest that emissions reduc tions from these close proximity sources should also be allowed to be used as offsets within the adjacent nonattainment area. The commenter’s suggestion fails to address the statutory

requirements for offsets and, more specifically , does not confront the s tatutory

provisions restricting where offsets can be obtained from . In accordance with the requirements under section 173(c)(1) of the CAA , emissions offsets must be obtained from the same nonattainment area, except that the state may allow a source to obt ain offset s from another nonattainment area if (1) that area has an equal or higher nonattainment classification than the nonattainment area in which the source requiring the offsets is located, and (2) emissions from that other area contribute to a violat ion of the NAAQS in the nonattainment area in which the source requiring the offsets is located. Accordingl y, the EPA does not intend to revise the existing requirements as to where emissions offsets may

be obtained to allow use of offsets from attainment areas. 3. Facilitating New Source Growth in Nonattainment Areas a. Offset Banks States can help facilitate continued economic development in a nonattainment area b y establishing offset banks or registries. Such banks or registries can help new or modified major stationary source owners meet offset requirements by streamlining identification and access to available emissions reductions. Some states have established offset banks to help ensure a consistent method for generating and transferring NO x and*** E.O. 12866 Review

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Page 98 of 223 VOC o ffsets. 53 Offsets in these areas are generated by emissions reductions that meet specific creditability

criteria set forth by

the SIP consistent with EPA regulations. See existing 40 CFR 51.165(a)(3)(ii)(A)
- (J) and part 51 Appendix S section IV.C. b. Interp recursor Offset Substitution In the proposal, the EPA recognized that s tates could establish interprecursor 54 offset substitution provisions, which would create additional flexibility in meeting offset requirements b y allowing NO x emissions reductions to satisfy VOC offset requirements and vice versa. See 78 FR at 34201. The EPA received no adverse comments on whether to allow such interprecursor trading for ozone and no comment suggested that such trading is not or should not be al lowed for ozone. In fact, all comments addressing the EPA’s statements in the proposal concerning interprecursor trades for ozone for nonattainment NSR permitting were in support of allowing NO x emissions reductions to satisfy VOC offset requirements and v ice versa. Although there were no adverse comments relating to the EPA’s ability to allow interprecursor trading for ozone, the EPA recognize s that the current language of 40 CFR 51.165(a)(11) and part 51 Appendix S IV.G.5 could be read to limit interprec ursor trading to PM 2.5 , and thus to preclude this kind of interprecursor trading for ozone precursors (NO x and VOC )
. However, the EPA has issued previous guidance that clearl y allow s for such interprecursor trading for ozone precursors. 55 While the EPA did not

53 See , for example, emission reduction credit banking programs in Ohio (OAC Chapter 3745
- 1111) and California (H&SC Section 40709). 54 For purposes of this rulemaking, we are using the terms interprecursor and interpollutant interchangeabl y. 55 “Improving Air Quality with Economic Incentive Programs” document at http://www.epa.gov/region07/air/nsr/nsrmemos/eipfin.pdf
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Page 99 of 223 specificall y propose to amend the nonattainment NSR regulations to address interprecursor trading for ozone , the proposal indicated th e EPA’s intent to continue to allow states to establish provisions that allow for such interprecursor trading for ozon e precursors . As noted previousl y , the EPA received no adverse comments on the interprecursor aspect of the proposal. Commenters did, however, indicate support for ensuring in the final rulemaking that interpollutant trading would continue to be allowed , and one commenter indicated support for measures similar to what was authorized in the final 2008 PM 2.5 NAAQS implementation rule, ( see 73 FR 28321 ) which revised the regulations and Appendix S to allow for interprecursor trading for PM2.5 precursors. Ac cordingl y, the EPA is taking action in this final rulemaking to amend the regulatory

text in both section 51.165 and Appendix S as a logical outgrowth of the proposal and the submitted comments to ensure that the offset provisions of both rules are consist ent with our proposal and our ongoing position to allow such trades for the ozone precursors (VOC and NO x ). See revised 40 CFR 51.165(a)(11) and part 51 Appendix S IV .G.5. These changes in the regulatory text are intended to clarify that interprecursor tra ding continues to be an option for the ozone precursors VOC and NO x , as long as such trades are consistent with existing policy and legal requirements; these revisions are not intended to change the underlying requirements for such trades. Please refer to the

stated: “[o]zone interprecursor trading can be used to meet NSR offset requirements, regardless of whether the NS R offset emission reductions are generated through an EIP.” Id. at 244. For additional memoranda and guidance documents, see http://www.epa.gov/region7/air/nsr/nsrindex.htm
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Page 100 of 223 Response to Comments document in the d ocket for this rulemaking for more detailed information and responses to comments with respect to interprecursor trading concerns. c. Economic Development Zones (EDZs) Section 173(a)(1)(B) of the CAA authorizes th e Administrator, in consultation with the Secretary

of Housing and Urban Development (HUD), to identify areas within nonattainment areas as "zone[s] to which economic development should be targeted." Under this section , new or modified major stationary sources that locate in such a zone are relieved of the NSR requirement to obtain emission offsets if (1) the relevant SI P includes an NSR nonattainment program that has established emission levels for new and modified maj or sources in the zone ("growth allowance"), and (2) the emissions from new or modified stationary sources in the zone will not cause or contribute to emission levels that exceed such growth allowance. Section 172(c)(4) of the CAA requires that the growth allowance be consistent with the achievement of reasonable further progress, and that it will not interfere with attainment of the applicable NAAQS b y the applicable attainment date for the nonattainment area. The EPA is willing to work with HUD and states to identify

potential areas that could be identified as EDZs. 4. Deadline for Submitting Nonattainment NSR Program SIPs for 2008 ozone NAAQS As explained in section III.A of this preamble, several commenters noted that the EPA’s proposed rulemaking did not address the SIP submittal deadline for the nonattainment NSR program for the 2008 ozone NAAQS. As explained in section III.A, the final rule includes a deadline of 3 y ears from the effective date of designation for states to submit their nonattainment NSR program SIPs for the 2008 ozone NAAQS. The rationale for this deadline appears in section III.A of this preamble.*** E.O. 12866 Review

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Page 101 of 223 J. What are the emission inventory and emission statement requirements? 1. Emission Inventory Requirements a. Summary of the Proposal We proposed that states should rely on their 3
- ye ar cy cle inventory as described by the Air Emissions Reporting Requirements ( AERR) to meet 182(a)(3)(A) periodic inventory obligation s and that the emissions reporting requirements of the AERR be applied to de termine all of the data elements required for such inventories (see , e.g. , Tables 2A, 2B, 2C and 2D of 40 CFR part 51, subpart A, Appendix A). We also proposed to follow our existing guidance, titled “Public Hearing Requirements for 1990 Base
- Year Emissions Inventories for Ozone and Carbon Monoxide Nonattainment Areas” in implementing certain SIP adoption and submission procedures for the emissi ons inventory requirements under CAA sections 182(a)(1) and 182(a)(3)(A) for purposes of the 2008 ozone NAAQS. b. Final Action and Rationale We are generall y finalizing as proposed , although in light of comments received we made small change s to address r eporting of ozone season day and partial county emissions n ot currently addressed in the AERR , as explained below . CAA section 182(a)(3)(A) requires that states submit periodic emission inventories no later than the end of each 3
- ye ar period after submissi on of the base year inventory for the nonattainment area. This requirement applies to Marginal and above ozone nonattainment areas. Thus, states must submit this periodic inventory no later than the end of each 3
- ye ar period after submission of the base y e ar inventory for the nonattainment area. The periodic inventory required by this final rule must include ozone season day emissions of*** E.O. 12866 Review

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Page 102 of 223 VOC and NO x for point, nonpoint and mobile sources (on
- road and non
- road) and fire
related event emissions
. On December 4, 2008, the EPA promulgated the AERR rule (40 CFR 51, subpart A). The AERR requires states to submit comprehensive statewide 3
- ye ar cy cle annual emission inventories (2008, 2011, 2014, etc .) for a number of pollutants (see list provided at 40 CFR 51.15(a)) regardless of an area’s attainment status. During the submission of the 3
- year c yc le inventories in accordance with the AERR, states may also submit ozone season day emissions to meet the periodic inventory requirement of this rule. If the p eriodic inventory required b y this rule is not included in the AERR submission , then it must be submitted to the EPA through other mechanisms in coordination with the Regional Office. Emission inventory elements submitted per the AERR that are relied on in the SIP also need to be adopted through the SI P submittal requirements per. Section 51.100 et seq . We are finalizing the requirement that states use the reporting requirements of the AERR to determine the data elements required for such inventories, while including an additional requirement to report ozone season day emissions , as defined in this final rule, rather than the AERR requirement for annual emissions for both the base y ear inventory for the nonattainment area and the periodic inventory
. Addition ally , the EPA has included within section 51.1100(bb) and (cc) of this final rule definitions pertaining to base year inventory and the ozone season day emissions , in response to several significant comments as explained in section III.J.1. c . Accordingl y, a base year inventory for the nonattainment area is due no later than 2 ye ars after the effective date of designations , and the emissions included in this inventory must be ozone season day emissions as defined in section 51.1100( cc ) of this rule. A period ic inventory must be submitted on*** E.O. 12866 Review

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Page 103 of 223 intervals no later than the end of each 3
- ye ar period after submission of the base y ear inventory for the nonattainment area. T he EPA has concluded that ozone season day emissions are the most appropriate temporal basis f

or developing the emissions to be included in this inventory , rather than summer day

emissions as required by past implementation rules or the AERR
. The EPA believes that s ummer day emissions required previously are an insufficient nomenclature, since in s ome areas nonattainment may be due to ozone exceedances in months other than summer months ( e.g. , wintertime), and necessitate focusing planning efforts on emissions occurring during the most relevant time period. Other than changing the name to be more in clusive, the definition of the emissions to be included is essentially the same as the previous definition. Ozone season day emissions means an average day ’s emissions for a ty pical ozone season work weekday section as defined in section 51.1100( cc ). The s tate will select, subject to EPA approval, the particular month(s) in the ozone season and the day (s) in the work week to be represented. The selection of day s should be coordinated with the conditions assumed in the development of RFP plans and/or emissio ns budgets for transportation conformity to allow comparability

of dail y emissions estimates. The day s should represent the conditions that contribute to high ozone that led to a nonattainment designation. For all inventories submitted to the EPA for this rule, states must use the reporting requirements of the AERR to determine which sources are reported as point sources as well as the detail ( i.e. , data elements) required for such inventories, with the exception of the emissions values. The emissions values must be ozone season day emissions rather*** E.O. 12866 Review

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Page 104 of 223 than the AERR requirement for annual emissions for both the base ye ar inventory for the nonattainment area and the periodic inventory
. Inventories of partial
- county nonattainment areas must match the spatial extent of the nonattainment area to include only emissions within the nonattainment area. The EPA acknowledges the challenges associated with partial county inventories and has prepared
an updated draft of the emissions inventory guidance (see below) to p rovide additional information for air agencies to use in preparing partial county emissions. The base ye ar inventory for the nonattainment area is used as the baseline for RFP plans to achieve emissions reductions within the nonattainment area. As explaine d more fully in section III.C of this preamble , the EPA has determined that emissions reductions in areas outside the nonattainment area cannot be included in the area’s RFP demonstration. Thus, the EPA has concluded that for nonattainment areas with parti al county boundaries, all inventories must be developed to reflect the partial county boundaries. This requirement partly supersedes the requirement to use the AERR data elements, such that for nonpoint and mobile sources, the county field required b y the AERR should be replaced by a separate identifier to indicate the partial count y nonattainment area. Because of this partial difference in requirements, periodic inventories for partial count y nonattainment areas cannot be reported to the EPA as part of a s tate’s AERR/NEI triennial inventory submission . Instead, states must make available the inventory data to the EPA as electronic files in some other electronic media, such as FTP, zip drives, or DVDs. For all inventories that are used in developing RFP plans or attainment demonstrations, mobile source emissions should be estimated using the latest emissions models, data and planning assumptions available at the time the SIP is developed. The*** E.O. 12866 Review

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Page 105 of 223 latest approved models should be used to estimate emissions from o n - road and non
- road sources, in combination with the latest available estimates of vehicle miles traveled ( VMT ) , vehicle population, and/or equipment activity . States are advised to check the EPA web pages for the currentl y approved mobile source models an d to consult with the EPA Office of Transportation and Air Qualit y and their Regional Office to determine the versions of models to use for their SIPs for the 2008 ozone NAAQS. For on
- road mobile emissions in states other than California, the current appro ved version of MOVES, as well as links to the Federal Register Notice approving that version, and links to guidance documents with much more detail on when and how MOVES should be used can be found at: http://www.epa.gov/otaq/models/moves/index.htm
. For Ca lifornia, consult with the EPA Region 9 Office for the information on the latest approved version of the EMFAC (EMissions FACtors ) model . Emissions from non
- road equipment should be estimated with the latest official version of the EPA's NONROAD model, and other appropriate methods for estimating emissions from sources not covered b y these models. Links to Federal Register notices and policy guidance memos on the latest approved versions of MOVES and NONROAD can be found at http://ww w.epa.gov/otaq/models.htm
. Additional information is available to states for all emissions sources and quality assurance in the form of guidance. States should consult the latest version of the guidance document “Emission Inventory Guidance for Implementat ion of Ozone and Particulate Matter National Ambient Air Quality Standards (NAAQS) and Regional Haze Regulations,” EPA

–454/R

– 05

– 001 (latest final November 2005; revised draft April 2014) and an y subsequent updates to that guidance that the EPA makes availa ble (which*** E.O. 12866 Review

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Page 106 of 223 can be found at http://www.epa.gov/ttn/chief/eidocs/eiguid/index.html). States should submit inventories that are appropriate for each nonattainment area and consistent with the EPA’s guidance. As indicated previousl y , some inventories submitte d to meet the requirements of section 182(a)(1) and 182(a)(3)(A) may be used in the development of RFP plans and/or attainment demonstrations. The EPA expects that the base ye ar inventory for the nonattainment area will serve as the RFP plan baseline. As s uch, the EPA requires the methodologies used to develop these inventories to be clearly documented and the inventories themselves to be subject to public participation requirements and formal approval/disapproval b y the EPA. 56 The EPA is not finalizing th e proposed approach, where we advised that states could follow our existing September 29, 1992, guidance, titled, “Public Hearing Requirements for 1990 Base
- Year Emissions Inventories for Ozone and Carbon Monoxide Nonattainment Areas” in implementing certain SIP adoption and submission procedures for the emissions inventory requirements under CAA sections 182(a)(1) and 182(a)(3)(A) for purposes of the 2008 ozone NAAQS. In that guidance, the EPA indicated it could provide states with a time
- limited “ de minimis ” deferral of the CAA’s state public hearing requirement for the emissions inventory SIP revision required to be

56 Incomparison, the AERR emissions data are submitted by the states to the EPA, e lectronically

via the Emission Inventory S ys tem to the National Emissions Inventory (NEI), and public review is not required for NEI purposes . The states submit data to the NEI inventory

12 months after the NEI inventory y ear ( i.e. , calendar ye ar 201 1 NEI inventory data were to be submitted by December 31, 201 2 ). The NEI process provides for the states to review the data as collected b y the EPA before the EPA officially publishes the data. Under the current process, the EPA intend s to publish the data 6 months after the AERR data are required to be submitted to the EPA.*** E.O. 12866 Review

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Page 107 of 223 submitted for each nonattainment area within 2 y ears of the date of designation. The EPA continues to believe that there are valid polic y reasons to provide such a deferral since the inventories alone do not have significant regulatory context without the accompanying
area - specific RFP plans or attainment plans, which are not required to be submitted until the 3 rd ye ar after designations at the earliest. However, as a general matter the CAA clearl y requires that SIP submittals, including emissions inventories (see CAA sections 182(a)(1) and 182(a)(3)(A)), must meet the requirements of CAA section 110(a)(2), which includes the requirement th at the state provide reasonable notice and public hearing for SIP submittals. As there is nothing in these CAA provisions that provides for waiver or delay of the public notification and hearing requirements specified in CAA section 110(a) de minimis or otherwise, we no longer believe it is appropriate to advise states to follow the 1992 guidance
. We instead remind states that the EPA’s implementing regulations at 40 CFR Part 51 (Requirements for Preparation, Adoption, and Submittal of Implementation Plans) provide flexibility for states to streamline SIP
related public notification and hearing procedures (for example, only holding a public hearing if one is requested, per 40 CFR § 51.102) , and we encourage states to take advantage of those provisions in mee ting the emissions inventory requirements under CAA sections 182(a)(1) and 182(a)(3)(A).
c . Comments and Responses Commenters provided a variet y of comments on issues relating to emissions inventories. A full accounting of those comments and the EPA’s det ailed responses are further explained in the Response to Comments document contained in the docket. Significant comments were made that resulted in small changes from the proposed rule.*** E.O. 12866 Review

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Page 108 of 223 In particular, commenters noted that the proposed rule failed to clearly indicate the need for seasonal or summer day emissions values in the required inventories and for use in the RFP plan. Different commenters suggested different terms, time periods, and emissions bases to use in the inventories and plans, including summe r day , ty pical summer day , high ozone season day , and maximum daily . These comments and others noted the discrepancy

with this rule and proposed changes to the AERR, in that seasonal emissions were not expressly required b y either the proposed ozone requir ements rule or the proposed AERR changes. As a result of these comments, the EPA has included the requirement in this rule as a logical outgrowth for ozone season day emissions , as defined in this final rule, to be used in emission inventories submitted for ozone SIPs. One commenter noted that partial county areas are not expressly addressed in the emissions inventory requirements and pointed out that it will be burdensome for states to create partial count y i nventories. The EPA addresses partial county emissions in this final rule by specificall y defining the emissions to be included as “within the boundaries of the nonattainment area” and clarifies in this preamble that such partial county estimates are still needed to comply

with the CAA requirements for inventories and RFP plans. 2. Source Emission Statements States must develop emission reporting programs, called emission statement programs, for VOC and NO x sources in accordance with CAA section 182(a)(3) (B). The required state program and associated regulation defines how states obtain emissions data directly from facilities and report it to the EPA. States should coordinate their emission statement regulations with the requirements laid out in this rule, which includes coordination with requirements of the AERR.*** E.O. 12866 Review

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Page 109 of 223 The EPA published guidance on source emission statements in a July 1992 memorandum titled, “Guidance on the Implementation of an Emission Statement Program.” A memorandum titled, “Emission Stateme nt Requirements Under 8
- hour Ozone NAAQS Implementation,” dated March 14, 2006, clarified that the source emission statement requirement under the CAA was applicable to all areas designated nonattainment for the 1997 ozone NAAQS and classified as Marginal or higher under subpart 2, part D, title I of the CAA. This requirement similarly applies to all areas designated nonattainment for the 2008 ozone NAAQS. Most areas that need an emission statement program already have one in place due to a nonattainment de signation for an earlier ozone NAAQS. If an area has a previousl y approved emission statement rule in force for the 1997 ozone NAAQS or the 1
- hour ozone NAAQS that covers all portions of the nonattainment area for the 2008 ozone NAAQS, such rule should be sufficient for purposes of the emissions statement requirement for the 2008 ozone NAAQS. The state should review the existing rule to ensure it is adequate and, if it is, may rel y on it to meet the emission statement requirement for the 2008 ozone NAAQS. In cases when an existing emission statement requirement is still adequate to meet the requirements of this rule, states can provide the rationale for that determination to the EPA in a written statement in the SIP to meet this requirement. States should id entify the various requirements and how each is met by the existing emission statement program. In cases when an emission statement requirement is modified for an y reason, states must provide the revisions to the emission statement as part of their SIP
. K. Wh at are the ambient monitoring requirements?*** E.O. 12866 Review

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Page 110 of 223 The EPA’s ambient monitoring requirements are contained in 40 CFR p art 58. Monitoring rule amendments published on October 17, 2006, (71 FR 61236) established minimum ozone monitoring requirements based on p opulation and levels of ozone in an area to better prioritize monitoring resources. The minimum monitoring requirements are contained in Table D
- 2 of Appendix D to part 58. The Photochemical Assessment Monitoring Station (PAMS) program, required by CAA sec tion 182(c)(1), collects enhanced ambient air measurements in ozone nonattainment areas classified as Serious, Severe, or Extreme. The monitoring rule amendments published on October 17, 2006 , reduced the minimum PAMS requirements. The revisions were intended to require the retention of the minimum common PAMS network elements necessary to meet the objectives of every

PAMS program, while freeing up resources for states to tailor other features of their own PAMS networks to suit their specific data needs
. This final rule makes no changes to these existing requirements. L. How can an area qualify for a 1

- year attainment deadline extension? 1. Summary of the Proposal Section 181(a)(5) of the CAA addresses the conditions under which an area may be eligible for a 1
- year extension of its attainment date. Because that statutory provision was written for an exceedance
- based standard, such as the 1
- hour ozone NAAQS, the EPA established through the Phase 1 Rule (40 CFR 51.907) an interpretation that would apply to a concentration
- based standard, such as the 1997 ozone NAAQS. 57 We proposed

57 The exceedance based standard basicall y allowed the NAAQS level to be exceeded an average of onl y once a year over a 3
- ye ar period. (This is a generalization of how attainment is determined; the actual method considers other factors such as completeness of the data.) See 40 CFR, appendix H. Incontrast, the concentration based standard*** E.O. 12866 Review

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Page 111 of 223 the same approach as set forth in section 51.907 for purposes of the 2008 ozone NAAQS, which like the 1997 ozone NAAQS is a concentration
- based standard. 2. Final Action The EPA is finalizing th e proposed approach . An area that fails to attain the 2008 ozone NAAQS by

its attainment date would be eligible for the first 1
- ye ar extension if, for the attainment ye ar, the area’ s 4 th highest daily maximum 8
- hour average is at or below the level of the standard. The area would be eligible for the second 1
- ye ar extension if the area’s 4 th highest dail y maximum 8
- hour value, averaged over both the original attainment ye ar and the fi rst extension y ear, is at or below the level of the standard. Thus, to be eligible for the first 1
- ye ar extension, the 4 th highest daily maximum 8
- hour value for an area would need to be at or below 0.075 ppm. The area would be eligible for the second exte nsion if the area’s 4th highest dail y maximum 8
- hour value, averaged over both the original attainment ye ar and the first extension y ear, is less than or equal to 0.075 ppm. 3. Rationale This approach is the same approach used for implementing the 1997 ozone NAAQS. The EPA believes this approach makes sense for the 2008 ozone NAAQS as well
. 4. Comments and Responses The EPA received no adverse comments on the proposed action
. M. How will the EPA identify rural transport areas? allows the level of the 8
- hour ozone NAAQS to be “exceeded” more than once a ye ar on average because the form (concentration
- based) of that NAAQS is determined by averaging the 4th highest reading for each y ear over a 3
- ye ar period.*** E.O. 12866 Review

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Page 112 of 223 1. Summary of Proposal The CAA Amendments of 1990 contained section 182(h) that provides a “rural transport” determination for ozone nonattainment areas that are rural in nature and can demonstrate that sources in the area do not make a significant contribution to ozone concentrations measured in the area or in other areas. These areas are subject to Marginal nonattainment area requirements, regardless of the area’s classification under section 181(a ) . This classification was created for rural nonattainment areas whose ozone problem is the result of ozone and/or precursors transport into the area that is so overwhelming that the contribution of local emissions to ozone concentrations above the level of the NAAQS is relatively minor and that emissions within the are a do not significantl y contribute to ozone measured in other areas. The criteria in CAA section 182(h) make use of the terms “Metropolitan Statistical Area” (MSA) and “Consolidated Metropolitan Statistical Area” (CMSA) as defined b y the U.S. Bureau of the Census. In 2000, OMB issued new standards 58 for defining statistical areas to replace the pre
- existing MSA and CMSA definitions (65 FR 82228; December 27, 2000). Under the 2000 standards, MSAs are defined as having a central count y or counties with an urbanized area of at least 50,000 people, plus adjacent outlying counties having a high degree of economic integration with the central county , as measured through worker commuting ties. Multiple counties are included in a MSA if at least 25 percent of e mploy ed residents in the central county commute to work in one or more adjacent counties. The term CMSA was retired in 2003 with the introduction of Core Based Statistical Area concepts. We proposed to interpret the references to both
58 See http://www.census.gov/population/www/metroareas/metrodef.html
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Page 113 of 223 MSA and CMSA in secti on 182(h) to refer to the new Census Bureau definition for the term MSA. 2. Final Action and Rationale We are finalizing, as proposed, the interpretation of the references to both MSA and CMSA in section 182(h) to refer to OMB’s current definition of MSA. Accordingl y, to qualify as a rural transport nonattainment area, the nonattainment area’s boundary could not include or be adjacent to a current OMB
- defined MSA. Under this approach, any nonattainment area associated with a Census
- defined micropolitan area (areas with central count y or counties containing an urban cluster of 10,000
- 49,999 people plus adjacent counties having a high degree of economic and social integration as measured through worker commuting) or an area too sparsely populated to be included in a census
defined statistical area, may be able to qualify

as a rural transport nonattainment area. 59 An area seeking to be classified as a rural transport nonattainment area would also need to meet the other criteria specified in secti on 182(h). The EPA believes this interpretation of CAA section 182(h) is consistent with the original scope of section 182(h) as promulgated in 1990 and provides maximum flexibility for areas to qualify

for this determination where appropriate. We did not receive an y adverse comments on our proposed interpretation. N. W hat are the special requirements for multi

- state nonattainment areas? Each state within a multi
- state ozone nonattainment area is responsible for meeting all the requirements relevant to that area. Section 182(j)(1)(A) requires that

59 During the designations process for the 2008 ozone NAAQS, the EPA did not identify any areas as rural transport areas.*** E.O. 12866 Review

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Page 114 of 223 states should “take all reasonable steps to coordinate substantively and procedurall y” on SIP development. States should coordinate on topics such as determining the appropriate modeling domain, bas eline y ear, projection y ears and meteorological episodes. In addition, they

should coordinate modeling efforts and, as required b y section 182(j)(1)(B), the attainment demonstration must be based on photochemical grid modeling or another method determined by the EPA to be at least as effective. Section 182(j)(2) recognizes that in certain instances, one or more states within a multi
- state nonattainment area may not submit an attainment plan by the required date, thus interfering with the ability of the are a as a whole to demonstrate attainment. In such case, section 182(j) provides that even though the area as a whole would not be able to demonstrate attainment, the sanction provisions of section 179 shall not apply in the portion of the nonattainment area located in a state that submitted all other provisions of an attainment plan and demonstrated that it could have demonstrated attainment but for the failure of the other state to cooperate. The EPA did not propose an y changes to its prior interpretations o f these sections of the CAA ( See 70 FR 71612) , and no comments were received on these provisions
. Therefore, these interpretations will continue to apply for purposes of the 2008 ozone NAAQS. O. How will the EPA address interstate and international ozone transport? 1. Interstate Transport The EPA recognizes that many states are affected by transported ozone and ozone precursors from upwind states, and that transported pollution may contribute significantly to air pollution that exceeds the NAAQS in those s tates. The CAA establishes states’ responsibilities to address interstate transport through two provisions. First, s ection*** E.O. 12866 Review

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Page 115 of 223 110(a)(2)(D)(i) obligates states to include provisions in their infrastructure SIPs to prohibit any

source or other ty

pe of emissions activity

in one state from contributing significantl y to nonattainment, or interfering with maintenance, of the NAAQS in another state, from interfering with required provisions preventing significant deterioration of air quality or from interfering with measures to protect visibility in another state . Second,
s ection 126 directs states to include provisions to establish a notification process in their infrastructure SIP s through which downwind jurisdictions can be alerted to specific sources of transported pollution
. The EPA issued its “Guidance on Infrastructure State Implementation Plan Elements Under the Clean Air Act Sections 110(a)(1) and 110(a)(2),” on September 13, 2013 , 60 on the required elements of the section 110 infrastructure SIP submi ttal for the 2008 ozone NAAQS. This guidance does not, however, address the requirements of CAA section 110(a)(2)(D)(i). The proposal for this rulemaking, and this final rule, also do not address these requirements relating to transport. The EPA will addre ss the transport requirements in a separate action. Where interstate transported emissions contribute to an exceedance or violation and come from natural sources such as wildfires, a ir agencies can use the provisions in the EPA’s Exceptional Events Rule (40 CFR 50.14) to request exclusion of affected data
. Once EPA concurs with an air agency ’s request, the event
- influenced data are officiall y noted and removed from the data set used to calculate official design values. Becau se of previousl y expressed stakeholder feedback regarding implementation of the Exceptional Events Rule and specific stakeholder concerns regarding the anal ys es that can be used to support ozone
- related exceptional event demonstrations, the EPA
60 See http://www.epa.gov/oar/urbanair/sipstatus/infrastructure.html
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Page 116 of 223 intends to propose revisions to the Exceptional Events Rule in a future notice and comment rulemaking effort and will solicit public comment at that time. Additionally , the EPA intends to develop guidance to address implementing the Exceptional Events Rule criteria f or wildfires that could affect ambient ozone concentrations. Depending on the nature and scope of international emission events affecting air quality in the U.S., the EPA may be able to assist states in developing approvable exceptional events demonstratio ns . 2. International Transport Most ozone air quality

problems in the United States are due primaril y to emission sources within the United States. However, domestic ozone air quality can also be affected b y sources of emissions located across United States borders in Canada and Mexico, and from other continents. These contributions to U.S. ozone concentrations from sources outside of the United States can affect to varying degrees the ability of some areas to attain and maintain the 2008 ozone NAAQS. The EPA will continue to work with o ur domestic and international partners to better understand the extent and implications of transboundary flows of air pollutants and, where possible, to mitigate their impact on U.S. domestic air qualit y. a. Summary of the Proposal Section 179B of the C AA allows the EPA to approve an attainment demonstration for a nonattainment area if: (1) the attainment demonstration meets all other applicable requirements of the CAA; and (2) the submitting state can satisfactoril y demonstrate that “but for emissions e manating from outside of the United States,” the area would attain*** E.O. 12866 Review

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Page 117 of 223 and maintain the ozone standard. The EPA proposed that this could include consideration of an y emissions from North American or intercontinental sources. b. Final Action and Rationale The EPA is finalizing this action as proposed
. The EPA believes that the best approach for addressing the potential impacts of international transport on nonattainment is for states to work with the relevant EPA Regional Office on a case
- by
- case basis to deter mine the most appropriate information and analy tical methods for each area’s unique situation. We will work with states that are developing plans pursuant to section 179B, and ensure the states have the benefit of the EPA ’ s developing understanding of inte rnational transport of ozone and its precursors. Although monitored data cannot be excluded for a determination of whether an area has attained a NAAQS based solely on the fact the data are affected by emissions from outside the U.S., such data may be exc luded from consideration if they were significantl y influenced by exceptional events as described in CAA section 319(b). Where international transport meets the criteria and procedural requirements contained in the EPA’s Exceptional Events Rule (40 CFR 50. 14), it may be addressed by

that rule. 61 c. Comments and Responses Comment : One commenter supported the EPA’s interpretation of CAA section 179B to include consideration of an y emissions from any non
- United States source and requested confirmation that the EPA’s interpretation may be applied to areas other than those adjoining i nternational borders. The commenter believed that section 179B does not

61 “Treatment of Data Influenced b y Exceptional Events; Final Rule” (72 FR 13560, March 22, 2007.)*** E.O. 12866 Review

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Page 118 of 223 limit this option to areas, regardless of classification and believed that the EPA did not provide an explanation for wh y it proposed limiting the availability of a determination under section 179B for Marginal classified areas. Response : The EPA appreciates the commenter’s support. The EPA has interpreted the Act such that section 179B allows the EPA to approve an attainment demonstration if the state can satisfactorily demonstrate th at ‘‘but for emissions emanating from outside of the United States,’’ the area would attain and maintain the ozone standard. The EPA has historically evaluated these demonstrations on a case
- by
case basis, based on the individual circumstances . The EPA do es not believe this provision is restricted to areas adjoining international borders. Also, in the proposal the EPA indicated that for areas classified as Moderate and above, the modeling and other elements of the attainment demonstration must show timely attainment of the NAAQS but for the emissions from outside of the U.S. However, if a M arginal area (which is not otherwise required to submit an attainment demonstration) were to submit to the EPA a demonstration that they

could attain the standard but for international emissions, the EPA would be able to evaluate that demonstration similarly to demonstrations submitted by higher classified areas. P . How will the section 182(f) NO x provisions be handled? 1. Summary of the Proposal We propose d , consistent with the approach taken in the Phase 2 Rule for the 1997 ozone NAAQS and the 2005 updated guidance, that a previousl y granted NO x exemption (or waiver) under the 1
- hour or 1997 ozone NAAQS would not automatically appl y for purposes of implementing the 2008 ozone NAAQS.*** E.O. 12866 Review

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Page 119 of 223 2. Final Action and Rationale We are finalizing this approach as proposed. A state with a previousl y approved NO x waiver for the 1
- hour or 1997 ozone NAAQS would need to submit a new request for an exemption that is supported b y anal ys es specific to the 2008 ozone NAAQS. The new request should consider an y relevant information developed after the 1
- hour or 1997 8
- hour ozone NAAQS waivers were granted. The EPA believes that while it may be appropriate in certain circumstances to grant NO x waivers, these waivers should be based upon applications and analy ses specificall y focused on the circumstances relevant for attainment of the 2008 ozone NAAQS, rather than a previous ozone NAAQS , since the standards for granting a waiver relate to attainment of the relevant NAAQS
. As states evaluate whether to seek a NO x waiver, the EPA encourages them to include consideration of air quality effects that may

extend bey ond the designated nonattainment area. A petition requesting a NO x exemption fo r the 2008 ozone NAAQS must contain adequate documentation that the provisions of section 182(f) , some of which relate to attainment impacts in other areas, are met. The January 14, 2005 memo 62 provides guidance on appropriate documentation for a waiver req uest for application to the 8
- hour ozone program. The EPA believes this guidance is sufficient to cover the 2008 ozone NAAQS. 3. Comments and Responses

62 Memorandum dated January 14, 2005, “Guidance on L imiting Nitrogen Oxides (NO x ) Requirements R elated to 8
- Hour Ozone Implementation” from Stephen D. Page, Director, Office of Air Quality Planning and Standards, to Air Directors, Regions I
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Page 120 of 223 Comment: One commenter stated that the EPA should avoid granting NO x exemptions for nonattainment areas that use NO x controls from other programs to demonstrate attainment and/or to address other provisions of the CAA. Response: In order to request a NO x exemption, a state must submit a petition specific to the 2008 ozone NAAQS. This petition must specifically address the provisions of section 182(f). The EPA will grant NO x exemptions only through notice
- and
comment rulemaking where the public will have an opportunity to address whether the petition complies with the provisions of section 182 (f). In granting waivers , the EPA will take into consideration existing NO x controls in an area. Q . Emissions R eduction B enefits of E nergy E fficiency/ R enewable E

nergy Policies and Programs, L and U

se P lanning and T

ravel E fficiency 1. Energy Efficiency/Renewable Energy Policies and Programs Energy efficiency

and renewable energy

(EE/RE) policies and programs are adopted b y federal, state and local governments to lower energy demand through the use of more energy

efficient equipment, technologi es and practices and to transition to cleaner energy . These policies help reduce electricity generation from fossil
- fueled sources, which, in turn, can result in lower emissions of NO x (as well as other criteria pollutants, hazardous air pollutants and gre enhouse gases)
. Energy efficiency

policies offer cost savings benefits, and can be a cost
- effective strategy to help achieve air quality goals. The EPA encourages state adoption of these policies and programs to benefit nonattainment areas and to reduce th e impact of ozone transport on downwind areas. In July 2012, the EPA released the “Roadmap for Incorporating Energy Efficiency/Renewable Energy Policies and Programs into State and Tribal*** E.O. 12866 Review

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Page 121 of 223 Implementation Plans (SIPs/TIPs) ” 63 to clarify guidance on the incorporation of EE/RE measures in SIPs/TIPs
. The Roadmap is a “living” document that will be updated periodicall y as new information becomes available. The Roadmap describes four pathway s that states can use for considering air pollution reductions from EE/RE policies and programs in SIPs and TIPs. Valid EE/RE policies and programs that meet the applicable requirements of section 182(c)(9) can also be used as contingency measures. In addition to the Roadmap, the EPA is providing training and technical
as sistance to state, tribal and local agencies, as well as tools for quantifying the emissions impacts of EE/RE policies and programs ( i.e. , the AVoided Emissions genERation Tool, AVERT 64 ), and energy

savings information for state
- level EE policies and programs. 65 The EPA is also working with states to develop examples that illustrate how reductions from specific EE/RE policies and programs could be quantified and considered in SIPs. 2. Land Use Planning States may

also wish to consider strategies that foster more efficient urban and regional development patterns as a long
- term air pollution control measure. Resources include the HUD DOT EPA Sustainable Communities Partnership, as well as the policy and technical guidance documents on land use available on the EPA’s Office of Transportation and Air Quality website. 66 These documents provide communities with the information they

need to better understand the link between air quality , transportation and land use activities, and how certain land use activities have the potential to help local

63 See http://www.epa.gov/airquality/eere.html
. 64 See http://epa.gov/avert/
. 65 See http://www.epa.gov/statelo calclimate/state/topics/energy

- efficiency.html
. 66 See http://www.epa.gov/otaq/stateresources/policy/pag_transp.htm*** E.O. 12866 Review

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Page 122 of 223 areas achieve and maintain healthy air quality . The documents also include methods to help communities account for the air qualit y benefits of their local land use activities in their air qualit y plans. If wildfire impacts are significant in a particular area , air agencies and communities may

be able to lessen the impacts of wildfires by working collaborativel y with land managers and land owners to employ various mitigation measures including taking steps to minimize fuel loa ding in areas vulnerable to fire. The EPA will provide additional guidance as needed, and will continue to work with states on incorporating these t ypes of programs into their SIPs. 3. Travel Efficiency Areas may

also consider incorporating travel efficiency strategies , such as new or expanded mass transit options, commuter strategies, sy stem operations ( e.g. , eco - driving, ramp metering), pricing ( e.g. , parking taxes, congestion pricing, intercit y tolls), speed limit restrictions and multimodal frei ght strategies in their SIPs. In March of 2011, the EPA released two documents that we believe will prove to be useful to states that want to evaluate emissions reductions that may be available from travel efficiency strategies. The first document is title d, “Potential Changes in Emissions Due To Improvements in Travel Efficiency .” This report provides information on the effectiveness of travel efficiency measures for reducing emissions of NO x , VOC and PM 2.5 at the national scale. The second document is tit led, “Transportation Control Measures: An Information Document for Developing and Implementing Emission Reduction Programs.” This document provides information on transportation control measures that have been implemented across the country

for a variet y o f purposes, including reducing emissions related to*** E.O. 12866 Review

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Page 123 of 223 criteria pollutants. These documents are available on the EPA’s Office of Transportation and Air Qualit y website. 67 R . Efforts to E

ncourage a M

ulti

- pollutant A

pproach W

hen D eveloping 2008 O

zone SIPs 1. Summary of the Proposal The EPA stated in the proposal that from a planning and resource perspective, we believe it can be efficient for states to develop integrated control strategies that address multiple pollutants rather than separate strategies for ea ch pollutant or NAAQS individually . The EPA also provided states with recommendations and considerations to take into account when developing a comprehensive approach. The EPA requested comment on what incentives or assistance we might be able to provide t o encourage states to integrate their planning activities. 2. Final Action and Rationale From a planning and resource perspective, the EPA continues to believe that multi
- pollutant control strategy planning can be efficient for states. An integrated air quality control strategy

that reduces multiple pollutants can help ensure that reductions are efficientl y achieved and produce the greatest overall air quality benefits. However, multi
- pollutant approaches are not required as part of this rule. States may

a lso find it desirable to assess the impact of ozone, PM 2.5 and/or regional haze control strategies on toxic air pollutants regulated under the CAA or under state air toxics initiatives. Given the relationships that exist between toxic air pollutants and th e formation of ozone and PM 2.5 , states and sources may find that controls can be

67 See http://www.epa.gov/otaq/stateresources/policy/pag_transp.htm*** E.O. 12866 Review

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Page 124 of 223 selected to meet goals for ozone and/or PM 2.5 attainment as well as those of specific toxic air pollutant programs. We recommend that states and tribes wishing to take a compr ehensive approach consider the following activities:

 Choose or develop models for use in the attainment demonstration that can assess the air quality

and ecos ys tem impacts of measures to reduce ozone precursors, secondary fine particles, pollutants that co ntribute to regional haze and, where appropriate, toxic air pollutants and other related pollutants that can impact ecos ys tems.

 Conduct an integrated assessment of the impact controls have on ambient levels of ozone, PM 2.5 , regional haze and, where applic able, toxic air pollutants, greenhouse gases, ecos ys tem protection and environmental justice considerations.

 Use common data bases and anal yt ical tools, where possible. 3. Comments and Responses Comment: Several commenters supported the use of a multi
- pollutant approach. One commenter encouraged the EPA to allow states to take credit for programs that may not y et have been fully

implemented. Another commenter noted the constraints in the CAA, which focuse s on a pollutant
- by
- pollutant approach, and another commenter stated that they prefer a single pollutant approach. Response: The EPA supports multi
- pollutant planning, where possible. Regarding the comment encouraging the EPA to allow states to take credit for programs that may not y et have been fully

implemented, please see S ection III.B in the preamble for details regarding the EPA’s final policy on this subject.*** E.O. 12866 Review

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Page 125 of 223 The EPA also supports considering the co
- benefits of emissions reductions on multiple pollut ants. We acknowledge that there are CAA constraints that may limit the incentive for multi
- pollutant planning , and clarify that single
- pollutant planning is acceptable under the Act
. S . W hat are the requirements for the OTR? The EPA proposed to adopt for the 2008 ozone NAAQS the same requirements applicable to the OTR that were codified in 40 CFR 51.916 for the 1997 ozone NAAQS, except that the submission date for OTR RACT SIPs required under section 182(b)(2) would be the same as provided under the RACT s ection of this regulation for nonattainment areas. ( See S ection III.A of this preamble for additional information on SIP submittal timeframes.) We are finalizing adopt ion of the requirements as proposed along with the OTR RACT SIP submittal due date. T . A re there any additional requirements related to enforcement and compliance? The EPA did not propose any specific regulatory

provisions related to compliance and enforcement. Section 172(c)(6) requires nonattainment SIPs to “include enforceable emission l imitations, and such other control measures, means or techniques ... as well as schedules and timetables for compliance, as may be necessary

or appropriate to provide for attainment ...” The EPA’s current guidance, “Guidance on Preparing Enforceable Regulations and Compliance Programs for the 15 Percent Rate
- of
- Progress Plans (EPA
452/R
- 93
- 005, June 1993)” is still relevant to rules adopted for SIPs under the 2008 ozone NAAQS and should be consulted for purposes of developing appropriate enforceable nonatta inment plan provisions under section 172(c)(6). The EPA did not solicit comment on this section and thus, none were received.*** E.O. 12866 Review

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Page 126 of 223 U . What are the requirements for addressing emergency episodes? 1. Summary of the Proposal The EPA proposed that the existing re quirements for emergency episodes (40 CFR p art 51, subpart H) would also apply to the 2008 ozone NAAQS. 2. Final Action and Rationale The EPA did not receive any adverse comments on the proposal. The EPA is finalizing the requirements for emergency episodes as proposed. The EPA believes the existing requirements for emergency episodes (40 CFR p art 51, subpart H) remain appropriate for th e 2008 ozone NAAQS and/or any current ozone NAAQS. If wildfire is a potential contributor to these episodes, the EPA urges implementing state and local agencies to coordinate with the land management agencies, as appropriate, in developing plans and approp riate public communications regarding public safet y and reducing exposure . V . How does the “Clean Data Policy” apply to the 2008 ozone NAAQS? 1. Summary of the Proposal The EPA proposed to apply the same approach with respect to the Clean Data Policy f or the 2008 ozone NAAQS as it applied in the Phase 1 Rule for the 1997 ozone NAAQS. That is, a determination of attainment would suspend the obligation to submit attainment planning SIP elements for the 2008 ozone NAAQS. Such a determination would suspend the obligation to submit any attainment
- related SIP elements not y et approved in the SIP, for so long as the area continues to attain the 2008 ozone NAAQS. 2. Final Action*** E.O. 12866 Review

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Page 127 of 223 The EPA is finalizing this action as proposed. The EPA is replacing 40 CFR 51.918 with 40 CFR 51.1118 to consolidate in one regulation a comprehensive provision applicable to determinations of attainment for the current and former ozone NAAQS. Thus 40 CFR 51.1118 will apply to a determination of attainment that is made with respect to any

revoked or current ozone NAAQS

– the 1
- hour, the 1997 or the 2008 ozone NAAQS. 3. Rationale The EPA continues to believe that it is appropriate for an area that has met an ozone NAAQS to suspend further attainment planning efforts for that ozone NAAQS. The new section 51.1118 sets forth the regulatory consequences of an EPA determination, made after notice
- and
- comment rulemaking, that an area designated nonattainment for an ozone standard has air quality attaining that standard. Upon such a determination by

the EPA, the requirements for the area to submit an attainment demonstration, associated reasonabl y available control measures, RFP plans , contingency measures and other attainment
- related planning requirements for that NAAQS, shall be suspended until such time as the area is redesignated to attainment, at which time the requirements no longer apply , or until the EPA determines that the area has again violated that ozone NAAQS, in which case the requirements are again applicable. 4. Comments and Respon ses Comment: Several commenters supported the continued use of the Clean Data Policy . One of these commenters requested that the EPA expeditiously redesignate areas using its CAA Section 107(d)(3) authority for states that have submitted "clean data" cert ification and redesignation/maintenance SIPs.*** E.O. 12866 Review

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Page 128 of 223 Response: As stated in the policy , the requirements for an attainment demonstration, RFP and contingency measures are designed to bring an area into attainment. Once this goal has been achieved, we believe the statute no longer requires submission of plans designed to bring the area into attainment and thus it is appropriate to suspend the obligation that s tates submit plans to meet that goal, so long as the area continues to attain the relevant standard. The E PA Regional Offices will act on redesignating areas based on any section 175 A submittals that were received in as expeditious a manner as possible
. W . How does this final rule apply to tribes? As we mentioned in the proposal, tribes are generally not requ ired to submit tribal implementation plans (TIPs). 68 However, should a tribe choose to develop a TIP, this final rule is intended to serve as a guide for addressing key implementation issues for their area of Indian country . This rule will likely be especia lly

useful to those tribes whose areas of Indian country were designated as separate nonattainment areas from surrounding state areas. X . W hat collaborative program has the EPA implemented for the 2008 ozone NAAQS?

68 On January

17, 2014, the United States Court of Appeals for the District of Columbia Circuit issued a decision vacating the EPA’s 2011 rule entitled “Review of New Sources and Modifications in Indian Country ” (76 FR 38748) with respect to non
- reservation areas of Indian country

( See, Oklahoma Department of Environmental Qualit y v. EPA , 740 F.3d 185 (D.C. Cir. 2014)). Under the court’s reasoning, with respect to CAA state implementation plans, a state has primary regulatory

jurisdiction in non
- reservation areas of Indian country

(i.e., Indian allotments located outside of reserv ations and dependent Indian communities) within its geographic boundaries unless the EPA or a tribe has demonstrated that a tribe has jurisdiction over a particular area of non
- reservation Indian country within the state .*** E.O. 12866 Review

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Page 129 of 223 The EPA stands read y to assist states in implementing the 2008 ozone NAAQS. The Ozone Advance program, which began in April 2012, is an opportunity for 2008 ozone NAAQS attainment areas to work collaboratively with EPA to improve local air quality . Information on the Ozone Advance program for the 2008 ozone NAAQS is provided in a separate guidance document that is available at http:// www.epa.gov/ozonepmadvance
. **IV. What**  **are the anti**  **- backsliding**  **requirements for**  **the revoked**  **1997 ozone NAAQS?**  A. Wh at is the effective date of the revocation of the 1997 ozone NAAQS? 1. Summary of the Proposal The EPA proposed to exercise its authorit y to revoke the 1997 ozone NAAQS for all purposes upon the publication of the final SIP Requirements Rule in the Federal Register
. 71 The EPA also proposed that anti
- backsliding provisions would apply to an area in accordance with its designation and, as applicable, its classification, for the 1997 (and, if applicable, 1
- hour) ozone NAAQS at the time of revocation of the 1997 ozone NAAQS . The following sections discuss in detail the applicable anti
- backsliding requirements and how they appl y to areas with various designations and classifications

71 The EPA’s Classifications Rule for the 2008 ozone NAAQS also provided that the 1997 ozone NAAQS would be revoked 1 y ear after the effective date of initial area designations for the 2008 ozone NAAQS for purposes of transportation conformity . The D.C. Circuit held that the EPA lacked authorit y for such a partial revocation, but did not question its authority

to revoke a standard in total. NRDC v. EPA (D.C. Cir. No. 12
- 1321, Dec 2 3 , 2014).*** E.O. 12866 Review

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Page 130 of 223 for the 2008 and the soon to be revoked 1997 and the alread y revoked 1
- hour ozone NAAQS. 72 2. F inal Action The EPA is revoking the 1997 ozone NAAQS for all purposes upon the effective date of this final rule, which will be 30 day s after publication of this rule in the Federal Register
. When the 1997 ozone NAAQS is revoked, the anti
- backsliding requ irements for that NAAQS, as detailed in this final rulemaking, become applicable. The extent of continued implementation efforts for a revoked standard derives from administration of anti
- backsliding requirements for the revoked standard. After the revocat ion of the 1997 ozone NAAQS , the EPA will no longer be able to take action to reclassify or to redesignate areas for that standard. After revocation of the 1997 standard, the designations (and the classifications associated with those designations) for that standard are no longer in effect, and the sole designations that remain in effect are those for the 2008 ozone NAAQS. However, the EPA is retaining the listing of the designat ed areas for the revoked 1997 ozone NAAQS in 40 CFR part 81, for the so le purpose of identifying the anti
- backsliding requirements that may apply to the areas at the time of revocation. Accordingl y, such references to historical designations for the revoked standard should not be viewed as current designations under CAA secti on 107 (d)
. 3. Rationale

72 The 1
- hour ozone NAAQS was revoked in the Phase 1 Rule. See 69 FR 23951 , April 30, 2004
. The D.C. Circuit upheld EPA’s authority to revoke that standard so long as it introduces a dequate anti
- backsliding measures. South Coast Air Quality Management Dist. v. EPA, 472 F.3d 882 , 899 (D.C. Cir. 2007)*** E.O. 12866 Review

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Page 131 of 223 This approach of establishing anti
- backsliding requirements is consistent with the EPA’s practice in the transition from the 1
- hour to the 1997 ozone NAAQS. It is not logical to attach to an area an y anti
- backsliding requirements fo r the revoked 1997 NAAQS until that NAAQS is revoked because up until revocation, implementation of the 1997 NAAQS is still adequately governed b y the relevant CAA and regulatory provisions, and the EPA can still take actions to redesignate or reclassify areas for that standard. 73 , 74 In fact, the status of many areas with respect to designation and classification for the 1997 ozone NAAQS has already changed since promulgation of the 2008 ozone NAAQS. Thus, the EPA concludes that it is reasonable to establish the date of revocation of the 1997 ozone NAAQS as the time for anti
- backsliding requirements for that NAAQS to take effect, which is consistent with past practice under the Phase 1 Rule. The EPA believes it is appropriate to revoke rather than retain the 1997 ozone NAAQS for all purposes. 75 Th is final action ensures that only one ozone NAAQS

—the more protective 2008 ozone NAAQS

— dire ctly applies, rather than having two standards apply concurrentl y. In revoking an y standard, the EPA provides adequate anti
backsliding requirements.

73 Although section 51.905(a) specified that the anti
- backsliding requirements “attached” at the time of designation for the 1997 ozone NAAQS, areas were still able to redesignate to attainment for the 1
- hour ozone NAAQS up to the date of revocation of that s tandard. 74 See , for example, the redesignations to 1
- hour attainment for Phoenix (June 14, 2005, 70 FR 34362) and Atlanta (June 15, 2005, 70 FR 34660) which occurred right up until the June 15, 2005 effective date of revocation of the 1
- hour ozone NAAQS. 75 When the EPA revises a NAAQS, the prior NAAQS is not automatically revoked. Accordingl y, both the 1997 ozone NAAQS and the more stringent 2008 ozone NAAQS are active standards unless and until the EPA takes action to revoke the previous 1997 ozone NAAQS , subject to appropriate anti
- backsliding requirements
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Page 132 of 223 We believe that revoking the 1997 ozone NAAQS is appropriate for all purposes. The EPA believes that the permanent retention of two standards, differing only in the
ozone concentrations they allow, creates unnecessary complexity and is not necessary to provide for attainment of the more stringent NAAQS . The EPA’s reason for establishing the new standard s of 0.075 ppm as requisite to protect public health and welfare was its conclusion that the old standard of 0.08 ppm was not adequate. Revoking (with appropriate anti
- backsliding measures) rather than retaining that 1997 ozone NAAQS will facilitate a more seamless transition to demonstrating compliance with the more health an d welfare protective 2008 ozone NAAQS. This approach will ensure the most efficient use of state and local resources in working toward attainment of the standard that the EPA has determined is requisite to protect public health and welfare . Moreover,
we believe that by

requiring adequate anti
- backsliding measures we will ensure continued momentum in states’ efforts toward achieving cleaner air. 4. Comments and Responses Comment: One commenter recognized the EPA’s authority to revoke the 1997 ozone NAAQS , but opposed the revocation because attainment of the 1997 NAAQS would advance progress toward the 2008 standard and ensures that such progress would be made sooner rather than later. The commenter indicated that the EPA’s proposal to revoke the 1997 ozon e NAAQS would waive key requirements for Extreme nonattainment areas under the 1997 standard before the deadline comes due. The commenter also state d that the EPA must explain the specific problems caused by retaining the 1997 (and 1
- hour) ozone NAAQS and tailor the solutions to address those*** E.O. 12866 Review

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Page 133 of 223 specific problems, citing several rulings that the commenter believed that the EPA must provide a rational basis for their action. Response: The anti
- backsliding approach that the EPA proposed retains all applicable c ontrol requirements for the 1997 ozone NAAQS, while enabling areas , where possible , to focus planning efforts on meeting the more protective 2008 ozone NAAQS. We believe the strong anti
- backsliding provisions in 40 CFR 51.1105 will ensure that controls alr ead y adopted to attain the previous NAAQS continue to be implemented until an area attains the 2008 ozone NAAQS, and will also ensure that there will be no delay in attaining the 1997 ozone NAAQS. Since it is impossible to attain the 2008 ozone NAAQS witho ut also attaining the 1997 ozone NAAQS, retaining the 1997 ozone NAAQS would be largely superfluous from a health protection standpoint
. The EPA agrees with the commenter that the adopted revocation approach means that the 1997 NAAQS would be revoked befo re the statutory maximum attainment date for areas classified as Severe and Extreme for the 1997 ozone NAAQS. We believe that Congress understood this possibility when it amended the CAA in 1990 to require the EPA to review each NAAQS every 5 ye ars. Similarly , Congress also recognized that areas with more significant ozone problems would need more time to attain the standard, and gave these areas more time to attain the standard, with timeframes for attainment largel y be yond the 5
- year timeframe required for review of the NAAQS. The EPA does not agree with the commenter’s characterization of revoking the NAAQS, while retaining a retinue of anti
- backsliding requirements, as creating perpetual extensions for attaining old standards. The commenter ’s argument ignores the fact that the old standard has been supplanted by

a more protective standard, and that the EPA’s anti
- backsliding*** E.O. 12866 Review

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Page 134 of 223 requirements, combined with the CAA’s new obligations to achieve the more stringent 2008 ozone NAAQS as expeditiously as practicable, effectivel y fulfill the function of the prior attainment date. In addition the EPA notes that the attainment demonstration for the prior standard is retained as an anti
- backsliding measure. The EPA believes that integrating prior requirements with new goals facilitates coherent, effective and timely planning and controls, and minimizes the separate potentially

duplicative submittal of requirements left over from obsolete standards. In this time of diminished resources, the states and the EPA need to move forward efficientl y without being overburdened by unnecessary

paperwork requirements arising from former standards that can detract from efficient movement towards more stringent standards. For these reasons, and consistent with the anti
- back sliding regime previously endorsed b y the D.C. Circuit , South Coast Air Quality Management Dist. v. EPA, 472 F.3d 882 for the transition from the 1
- hour to the 1997 ozone NAAQS , the EPA believes that the revocation and associated anti
- backsliding meas ures for the 2008 ozone NAAQS provide the appropriate way to move toward attaining the more protective standard s in a timely and effective manner, while ensuring that progress made under previous ozone NAAQS is not lost. For additional details, please refe r to the Response to Comments document
. Comment: A number of commenters in favor of revocation of the 1997 ozone NAAQS suggested alternate dates for revocation. Several commenters wanted an earlier date for revocation, such as the promulgation date of the 2008 ozone NAAQS or the effective date of designations for the 2008 ozone NAAQS. One of these commenters*** E.O. 12866 Review

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Page 135 of 223 questioned whether the revocation would occur on the date of publication of the rule in the F ederal R egister or on the effective date of the rule. Response: We disagree with comment ers that recommended that the EPA revoke the 1997 ozone NAAQS at an earlier date. We believe that revoking the 1997 ozone NAAQS prior to the establishment of clear anti
- backsliding requirements would create a gap when taki ng action on plans submitted by states. The EPA believes and the court has endorsed in South Coast v. EPA , 472 F.3d 882, that backstops to prevent relaxation of measures implemented for a previous NAAQS must be in place before the EPA can revoke that NAAQS. The EPA, upon considering the comment on the effective date of revocation, clarifies here that the 1997 ozone NAAQS wil l be revoked on the rule’s effective date as set forth in the Federal Register . That is, the 1997 ozone NAAQS will be revoked 30 day s after publication of the final rule in the Federal Register
. B. W hat are the applicable requirements for anti

- backsliding purposes following the revocation of the 1997 ozone NAAQS? 1. Summary of the Proposal The EPA proposal stated that subpart AA, 40 CFR section 51.1100 et seq. , would provide comprehensive anti
- backsliding requirements for transition to the 2008 ozone NAAQS . The EPA proposed that, upon revocation of the 1997 ozone NAAQS, subpart X, 40 CFR section 51.900 et seq ., would be effectively replaced by

the proposed subpart AA. In proposed subpart AA , 51.1100(o) specified the list of “applicable requirements” that would apply as anti
- backsliding requirements for the transition from the 1997 ozone NAAQS to the 2008 ozone NAAQS. The EPA proposed as “applicable*** E.O. 12866 Review

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Page 136 of 223 requirements” the requirements that were pre viously listed in section 51.900(f) (except for Stage II vapor recovery), 78 as well as the addition of three anti
- backsliding requirements that were included as a result of the South Coast v. EPA 79 decision: nonattainment NSR thresholds and offset ratios, no nattainment contingency measures for failure to attain b y the applicable deadline or to meet RFP milestones, and section 185 fee program requirements. Since the South Coast v. EPA decision, the EPA has been including these three requirements as anti
- backsl iding requirements for the 1
- hour ozone NAAQS for the purpose of discharging its obligations to effectuate anti
- backsliding for that standard. The proposed action would formally list them with the other applicable requirements. The applicable requirements discussed previously apply to areas that are designated nonattainment for the 2008 ozone NAAQS and remain nonattainment for a previous ozone NAAQS on the date the 1997 ozone NAAQS is revoked. For areas designated attainment for the 2008 ozone NAAQS but non attainment for the 1997 ozone NAAQS, the EPA proposed that after the 1997 ozone NAAQS is revoked, these areas would not be required to retain in their SIPs nonattainment NSR programs for ozone. Instead, such areas would be required to implement PSD require ments for ozone . The EPA’s determination that after revocation of the 1997 ozone NAAQS nonattainment

78 Under CAA section 202(a)(6), the EPA found that onboard refueling vapor recovery (ORVR) sy stems are in widespread use in the motor vehicle fleet and waived the section 182(b)(3) Stage II vapor recovery requirement for Serious and higher ozone nonattainment areas on May 16, 2012 (77 FR 28772). Thus, in th e proposal, the section 182(b)(3) Stage II requirement is omitted from the list of applicable requirements in 51.1100(o). 79 South Coast Air Quality Management District v. EPA , 472 F.3d at 899
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Page 137 of 223 NSR requirements do not apply to areas designated attainment for the 2008 ozone NAAQS is consistent with the Greenbaum v. EPA decision
. 80 Based on requireme nts in the Phase 1 rule for the 1997 ozone NAAQS, as modified in light of South Coast v. EPA , the definition of applicable requirements proposed in section 51.1100(o) included the following: 1) RACT; 2) Vehicle I/M programs; 3) Major source applicability cut - offs for purposes of RACT; 4) ROP and/or RFP reductions; 5) the Clean fuels fleet program under section 183(c)(4) of the CAA; 6) Clean fuels for boilers under section 182(e)(3) of the CAA; 7) Transportation control measures during heav y traffic hours a s provided under section 182(e)(4) of the CAA; 8) Enhanced (ambient) monitoring under section 182(c)(1) of the CAA; 9) Transportation controls under section 182(c)(5) of the CAA; 10) Vehicle miles traveled provisions under section 182(d)(1)(A) of the CAA; 11) NO x requirements under section 182(f) of the CAA; 12) Attainment demonstrations; 13) Nonattainment contingency measures; 14) Nonattainment NSR requirements; and 15) Section 185 enforcement requirements for Severe and Extreme nonattainment areas for fai lure to attain. As part of the proposal, the EPA indicated that upon revocation of the 1997 ozone NAAQS, the designations for that NAAQS would have no further effect except as reference s for anti
- backsliding purposes. References to the designations for th e revoked standard in 40 CFR part 81 would be retained solely for anti
- backsliding purposes for areas designated nonattainment for the 2008 ozone NAAQS, and should not be viewed as current nonattainment designations under CAA §107 within the meaning of 40 CFR
80 Greenbaum v. EPA , 370 F.3d 527, 536 (6 th Cir. 2004)
. “It would make little sense for [nonattainment NSR] to be included in the post
- attainment SIP, as the Clean Air Act . . . explicitly states that attainment area SIPs must include a PSD program.”*** E.O. 12866 Review

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Page 138 of 223 51.166(i)(2) and 52.21(i)(2) and, therefore, would not trigger the exemption from PSD requirements otherwise resulting from those provisions. The proposal also request ed comment as to whether or not an amendment to 40 CFR 51.166(i)(2) and 52.21(i)(2)
w ould be appropriate to make it clear that a nonattainment designation for a revoked NAAQS, once the revocation becomes effective in an area, would not trigger the PSD exemption in those provisions and would not prevent application of PSD requirements for that pollutant and how to word such an amendment. Alternatively , the EPA sought comment as to whether it would be sufficient for the EPA to articulate the interpretation of these provisions as described earlier in this paragraph. 2. Final Action The EPA i s finalizing the anti
- backsliding requirements as proposed , including amendments to 51.166(i)(2) and 52.21(i)(2) which address classifications for revoked NAAQS . The amended subpart AA addresses anti
- backsliding requirements for both the previously

revoked 1
- hour ozone NAAQS and the 1997 ozone NAAQS in a consolidated and streamlined fashion. Areas designated nonattainment for the 2008 ozone NAAQS and also designated nonattainment for the 1997 ozone NAAQS 81 at the time of revocation of the 1997 ozone NAAQS wi ll be subject to section 51.1100(o). As proposed, areas designated attainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS when the 1997 ozone NAAQS is revoked will become subject to PSD requirements rather than nonattainment NSR requirements once the revocation is effective
.

81 Note that some areas designated as nonattainment for the 1997 NAAQS might also retain anti
- backsliding requirements for the already revoked 1
- hour ozone NAAQS.*** E.O. 12866 Review

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Page 139 of 223 Also as proposed, three items are being added to the list of applicable requirements: nonattainment contingency measures, nonattainment NSR requirements (clarified to refer to major source thresholds and offset ratios) , and section 185 requirements for Severe and Extreme areas. As proposed, Stage II vapor recovery is not being included in the list of applicable requirements for the reasons described above
. Based on feedback received during the comment period, the EPA is specifically including two additional items in the list of applicable requirements: RACM and section 182(e)(5) contingency

measures. These provisions were implicitly included in the attainment demonstration but are listed separatel y for clarification. As such, the complete list of applicable requirements in section 51.1100(o) is: 1) RACT; 2) Vehicle I/M programs; 3) Major source applicability cut - offs for purposes of RACT; 4) ROP and/or RFP reductions; 5) the Clean fuels fleet program under section 183(c)(4) of the CAA; 6) Clean fuels for boilers under section 182(e)(3) of the CAA; 7) Transportation control measures during heav y traffic hours as provided under section 182(e)(4) of the CAA; 8 ) Enhanced (ambient) monitoring under section 182(c)(1) of the CAA; 9) Transportation controls under section 182(c)(5) of the CAA; 10) Vehicle miles traveled provisions under section 182(d)(1)(A) of the CAA; 11) NO x requirements under section 182(f) of the CAA; 12) Attainment demonstrations; 13) Nonattainment contingency measures; 14) Nonattainment NSR major source thresholds and offset ratios ; 82 15) Section 185 requirements for Severe and Extreme areas for failure to attain; 16) RACM; and 17) Contingency

me asures for SIPs invoking section 182(e)(5) of the CAA.
82 Itshould be noted that replacement of nonattainment NSR SIP provisions with PSD upon successful redesignation to attainment does not relieve sources of their obligations under previousl y established permit conditions.*** E.O. 12866 Review

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Page 140 of 223 3. Rationale As detailed in the proposal, 83 the EPA alread y treats nonattainment contingency measures, nonattainment NSR major source thresholds and offset ratios , and section 185 requirements for Seve re and Extreme areas as being included in the list of applicable requirements that appl y t o areas for anti
- backsliding purposes under the revoked 1
- hour NAAQS, consistent with the South Coast v. EPA decision. Their explicit inclusion in this list is to for

malize their place in the list of applicable requirements. Similarly , Stage II vapor recovery

is not included in this list due to the May 16, 2012 determination 84 that the requirement is waived, and that an area currently implementing a Stage II control program can, under certain circumstances, remove it from the SIP. These changes to the list of applicable requirements reflect policies already being implemented by the EPA. Similarly , areas designated attainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS when the 1997 ozone NAAQS is revoked will become subject to PSD rather than nonattainment NSR once the revocation takes effect
. An area that is attainment for the 2008 ozone NAAQS is attaining the most current and health protective ozone standard. The EPA believes that Congress did not intend to hold such an area to the requirements for an old standard when the area has met a newer, more stringent standard of the same form. Such areas will implement PSD for the 2008 ozone NAAQS once the revocation of the 1997 ozone NAAQS takes effect , notwithstanding any remaining references to nonattainment designations for the 1997 ozone NAAQS in 40 CFR p art 81. The references to the designations for the revoked standard in 40 CFR

83 See 78 FR 34178, June 6, 2013 84 See 77 FR 28772*** E.O. 12866 Review

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Page 141 of 223 part 81 are retained solely for anti
- backsliding purposes for areas designated nonattainment for the 2008 ozone NAAQS. Accordingl y, such references to historical nonattainment des ignations for the revoked standard should not be viewed as current nonattainment designations under CAA § 107 within the meaning of 40 CFR 51.166(i)(2) and 52.21(i)(2) and, therefore, do not trigger the exemption from PSD requirements otherwise resulting f

rom those provisions. Upon reviewing comments, the EPA decided that sufficient arguments were provided to append two additional items to the list of applicable requirements in 51.1100(o). Those two items are RACM and 182(e)(5) contingency measures. The EP A views this as a clarification, rather than as an addition of control elements. Attainment demonstration SIPs are already listed as an applicable requirement. RACM is an integral part of an approvable attainment demonstration. Similarly , contingency measures will become a required element of 51.1100(o) consistent with the South Coast v. EPA decision. Adding contingency measures associated with section 182(e)(5) to the list is a clarification, rather than an imposition of an additional requirement. 4. Comme nts and Responses Comment: A commenter pointed out that, with regard to applicable requirements, federal measures and locally implemented measures are held to two separate standards. The commenter used the example of Stage II vapor recovery. The EPA remov ed Stage II vapor recovery from the list of applicable requirements. However, locall y implemented control measures included in a SIP for a previous NAAQS must be retained in perpetuity
. Response : The EPA disagrees with the commenter. SIP
- approved control measures, whether federal programs or locall y implemented measures, may not be*** E.O. 12866 Review

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Page 142 of 223 modified unless the modification meets the requirements of CAA section 110(l) and, if applicable, section 193. For purposes of anti
- backsliding, Stage II control programs are
n o longer mandatory

because the EPA has determined under the statutory provisions of section 202(a)(6) that another federal program, onboard refueling vapor recovery (ORVR) technology , is in widespread use, rendering Stage II controls largely redundant. How ever, in an area where a Stage II control program is alread y adopted into the SIP, it cannot be removed from the SIP unless the conditions of CAA sections 110(l) and 193 are met. Therefore, it is subject to the same treatment as an y locall y implemented SIP
adopted control measure. Comment: A commenter stated that no planning requirements from the 1997 ozone NAAQS should apply once that NAAQS is revoked. The commenter based this on two arguments. First, CAA section 172(e) applies to control requirements and not state planning requirements. Second, the commenter argued that the decision in South Coast v. EPA has limited applicability because the court was faced with two ozone standards that differed in form and level, and in this situation the two standards a re of the same form. Response: The EPA agrees that the transition from the 1997 ozone NAAQS to the 2008 ozone NAAQS calls for a re
- evaluation of the provisions necessary to protect against backsliding and ensure continued progress toward achieving healthy air quality
. However, we do not agree that South Coast v. EPA has limited application to informing appropriate anti
- backsliding requirements for a revoked 1997 NAAQS simply because the 2008 NAAQS has the same form as the 1997 NAAQS. With only one exception, the seventeen “applicable requirements” that will be listed in new 40 CFR 51.1100(o) are all control requirements, consistent with South Coast v. EPA . To the extent that any of these*** E.O. 12866 Review

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Page 143 of 223 control requirements have not been implemented in a 1997 nonattainment area b y the time the 1997 NAAQS is revoked, consistent with So uth Coast v. EPA the state must ensure these controls are adopted into the SIP and implemented, if applicable. The one applicable requirement that involves both planning and control elements is the attainment demonstration requirement. 85 Since the attainment demonstration is part of the basis for establishing that the RACM requirement (a control requirement consistent with South Coast) is satisfied, the EPA believes it is appropriate to retain this as an applicable anti
backsliding requirement to ensure time ly progress toward attainment of the 1997 NAAQS, especially

for areas classified in the highest classifications where the statutory attainment dates for the 1997 NAAQS extend well into the future ( e.g. , 2019 for Severe and 2024 for Extreme areas). The EPA encourages states to sy nchronize their planning and emissions control efforts for attainment of the 2008 ozone NAAQS with any unfulfilled anti
- backsliding requirements associated with the revoked 1997 ozone NAAQS. As a reminder, a Clean Data Determination for the 1997 ozone NAAQS can suspend the associated attainment demonstration requirement for as long as the area continues to attain the 1997 NAAQS. Comment: A commenter pointed out that there are several control measures that continue to apply

to areas a fter a standard is revoked. The commenter argued that, for consistency , the EPA should include these items in the list of applicable requirements. For example, RACT is listed as an applicable requirement, but not RACM. The

85 An attainment demonstration includes technical analy ses of base y ear emissions and future ye ar emiss ions, including the impact of RACM and RACT ; a list of adopted control measures with schedules for implementation ; and a RACM anal ys is
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Page 144 of 223 commenter argued that RACM should be listed as an applicable requirement. Similarly , transportation conformity , “other control measures” as necessary for attainment under CAA section 172(c)(6), and contingency measures for CAA section 182(e)(5) measures should be retained as applicable re quirements , according to the commenter
. Response: The EPA agrees in part with the commenter, that it is appropriate to list both RACM and section 182(e)(5) contingency measures as “ applicable requirements ” in the final rule in section 51.1100(o). RACM is a component of the attainment demonstration and is a requirement of the CAA. The EPA reviews each SI P submission from a state to ensure that sufficient information is provided for the EPA to determine whether the state has adopted all RACM necessary for attainment as expeditiously as practicable and provided for implementation of those measures as expeditiously as practicable. For areas remaining in nonattainment for the 1997 ozone NAAQS and designated nonattainment for the 2008 ozone NAAQS, the EPA does no t believe that revocation of the NAAQS should halt or delay the planned implementation of control measures. These measures, while adopted pursuant to the 1997 ozone NAAQS, will also assist the areas in attaining the 2008 ozone NAAQS. Similarly , for Extrem e areas rel yi ng on CAA section 182(e)(5), the EPA agrees that the contingency

measures required for that program should be held to the same requirements as contingency measures for sections 172(c) and 182(c) of the CAA. Thus the EPA is adding 182(e)(5) contingency measures to the list of applicable requirements in 51.1100(o). However, the EPA does not agree with the commenter that conformity needs to be retained as an applicable requirement. Transportation and general conformity are retained*** E.O. 12866 Review

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Page 145 of 223 as requirement s for all areas designated nonattainment for the 2008 ozone NAAQS. For areas designated attainment for the 2008 ozone NAAQS, these areas are meeting the most stringent, health
- protective NAAQS and thus have no remaining conformity requirements because they are designated attainment for the 2008 ozone NAAQS and the designations for the 1997 ozone NAAQS which trigger conformity requirements are revoked. Transportation and general conformity apply onl y in areas designated as nonattainment or redesignated to att ainment with an approved CAA section 175A maintenance plan. (CAA section 176(c)(5)). Upon the effective date of the revocation of the 1997 ozone NAAQS the only relevant designation for ozone for conformity purposes will be an area’s designation for the 200 8 ozone NAAQS. 86 Areas that are designated attainment for the 2008 ozone NAAQS are not subject to transportation or general conformity

requirements regardless of their designation for the 1997 ozone NAAQS at the time of revocation of that NAAQS. (CAA sectio n 176(c)(5)). Similarly , “other control measures” necessary for attainment are already covered b y the attainment demonstration, and cannot be removed without satisfying CAA section 110(l). Comment: A commenter disagreed with what it described as the EPA ’s proposal to allow areas that were designated nonattainment for the 1997 ozone NAAQS or the 1
- hour NAAQS before those standards were revoked to terminate an y nonattainment NSR or 185 fee requirements once the 1997 ozone NAAQS is revoked and the area has been designated or redesignated attainment for the 2008 ozone NAAQS or a redesignation

86 The EPA revoked the 1997 ozone NAAQS for transportation conformity on May 21, 2012. (77 FR 30160) The revocation of the 1997 ozone NAAQS for transportation conformity

purposes was effective on July 20, 2013. In this final rule , the EPA is revoking the 1997 ozone NAAQS for all remaining purposes.*** E.O. 12866 Review

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Page 146 of 223 substitute has been approved for the revoked standard . The commenter argues that allowing such an area to remove nonattainment NSR or 185 fee requirements from the SIP i s contrary

to the NRDC v. EPA ruling. Response: The court ruled in NRDC v. EPA that it would be improper for the EPA to relieve an area that has not attained a standard from requirements imposed for failure to attain that standard. The EPA’s “redesignation substitute” proposal does not do that. It relieves areas that demonstrate that they are in fact attaining a standard from obligations arising from failure to attain that standard as well as all anti
- backsliding requirements applicable for an y prior revoked standard without the need for a formal redesignation. Nothing in the 2009 NRD C v. EPA decision forecloses that approach **.** The EPA also rejects an y suggestion that an area would remain subject to NSR or 185 fees after it is designated as an attainment area and an y prior standards for which it was designated nonattainment have been revoked
. Areas cannot be redesignated to attainment for ozone unless they

have attained all current standards and met all anti
- backsliding requirements applicable for prior revoked standards. Moreover, nonattainment NSR is not a requirement in attainm ent areas and 185 by its own terms does not apply to an area that has been designated “an attainment area for ozone.” C. Application of Transition Requirements to Nonattainment and Attainment Areas This section discusses how the transition requirements ap ply to various ty

pes of areas. The general principle is to apply transition requirements depending on how the area is designated

– attainment or nonattainment

– for the 2008 ozone NAAQS, while*** E.O. 12866 Review

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Page 147 of 223 taking into account the area’s status with respect to prior standards. 87 Inthe subsequent sections, for purposes of determining an area’s transition requirements, we first look to the area’s designation and classification for the 2008 ozone NAAQS. We then determine the area’s designation and classification status for the 1997 ozone NAAQS as of the effective date the 1997 ozone NAAQS is revoked. Finally , where appropriate, we determine whether anti
- backsliding requirements for the 1
- hour ozone NAAQS apply in the area and, if so, we determine the area’s designation and c lassification status for the 1
- hour ozone NAAQS as of the date the 1
- hour NAAQS was revoked. 88 Appendix B of this rule contains a list of areas subject to anti
- backsliding requirements. 1. Requirements for Areas Designated Attainment for the 2008 Ozone NAAQS and Maintenance for the 1997 Ozone NAAQS a. Summary of the Proposal For this category , the EPA proposed that an area’s approved section 175A maintenance plan for the revoked 1997 ozone NAAQS satisfies both its obligations for maintenance under section 1 10(a)(1) for the 2008 ozone NAAQS and its obligation to submit a second approvable maintenance plan under section 175A for the revoked 1997 ozone NAAQS. b. Final Action

87 One area, the Uintah Basin, UT, was designated as “unclassifiable,” and for purposes here would be treated like an area designated “attainment.” 88 If the nonattainment area was initially designated attainment for the 1997 ozone NAAQS or was redesignated to attainment (“Maintenance”) for the 1997 ozone NAAQS prior to the date of revocation of the 1997 NAAQS, then the area has already fulfilled any applicable 1
- hour anti
- backsliding requirements. For ease of reference, we refer to these areas as “Maintenan ce” areas.*** E.O. 12866 Review

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Page 148 of 223 The EPA is finalizing this as proposed. For areas designated attainment for the 2008 o zone NAAQS and maintenance for the 1997 ozone NAAQS (as of the date of revocation of the 1997 ozone NAAQS), the area’s approved section 175A maintenance plan for the revoked 1997 ozone NAAQS satisfies both its obligations for maintenance under section 110( a)(1) for the 2008 ozone NAAQS and its obligation to submit a second approvable maintenance plan under section 175A for the revoked 1997 ozone NAAQS. c. Rationale All areas in this category were alread y subject to a section 175A maintenance plan for the revoked 1997 ozone NAAQS, and have been both redesignated to attainment for the 1997 ozone NAAQS (as well as an y other revoked ozone NAAQS) and designated attainment for the more stringent 20 08 ozone NAAQS. The approved section 175A maintenance plan for the 1997 ozone NAAQS satisfied the anti
- backsliding requirements of these areas for the prior 1
- hour NAAQS . An y further 110(a)(1) maintenance plan requirement under the 2008 ozone NAAQS would b e unnecessarily burdensome. No revision to the section 175A maintenance plans for these areas can be approved unless it complies with the anti
- backsliding checks in CAA sections 110(l) and 193. The EPA believes that there is no justification for additional maintenance plan demonstration burdens to be imposed on these areas solely because at one time they were designated nonattainment under the revoked 1997 ozone NAAQS. This approach recognizes and reflects that these areas were redesignated to attainment fo r the 1997 ozone NAAQS prior to its revocation , and have been designated attainment for the 2008
ozone NAAQS
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Page 149 of 223 Comment: One commenter opposed this action for several reasons. First, the commenter stated that the EPA cannot dispens e with the statutory responsibility

of areas by excusing compliance with CAA section 110(a)(1). Second, the commenter believes that demonstrating long
- term compliance via an approved 175A maintenance plan for the 1997 ozone NAAQS is not sufficient to demon strate continued compliance with the 2008 ozone NAAQS. The commenter maintained that even with an approved 175A plan for the 1997 ozone NAAQS, emissions can continue to increase. There is nothing in the approved 175A plan that will be activated should the area start to violate the 2008 ozone NAAQS. Response: The EPA disagrees with the commenter. The EPA is not ignoring the maintenance provision of section 110(a)(1), but rather evaluating what is sufficient to address that provision under the circumstances of transition to a new more stringent NAAQS for an area designated attainment for that more stringent NAAQS. With the control measures included in their SIPs and in approved section 175A maintenance plans , those areas have alread y achieved sufficient emiss ions reductions to bring them into attainment for both the 1997 ozone NAAQS and the more stringent 2008 ozone NAAQS. These SIP control measures cannot be weakened without satisfying section 110(l) and in some cases also section 193 , which effectivel y serve as anti
- backsliding provisions . The EPA is not relieving areas designated attainment of the requirement under section 110(a)(1) to maintain the more stringent 2008 ozone NAAQS , but rather, the EPA is allowing the approved PSD plan for the 2008 ozone NAAQS to suffice as a maintenance showing for these areas. These are areas that already have many

controls in place,*** E.O. 12866 Review

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Page 150 of 223 including approved section 175A maintenance plans ensuring that the areas can maintain the level of the prior standard. While these approved 17 5A maintenance plans were established for maintenance of the 1997 ozone NAAQS, and accordingly help prevent backsliding for that revoked NAAQS, they

also provide a foundation for maintenance of the 2008 ozone NAAQS , which, in combination with other active requirements for the 2008 ozone NAAQS , contribute to maintenance of the new standard. The emissions reductions for one NAAQS build upon the emissions reductions from previous NAAQS. The EPA concludes that no additional measures bey ond the prior 175A mainte nance plans and the PSD plans for the 2008 standard should be necessary to provide for maintenance in these areas. The EPA will work with states as necessary to address an y future air qualit y concerns and maintenance needs for these areas
. 2. Areas Designa ted Attainment for the 2008 Ozone NAAQS and Nonattainment for the 1997 Ozone NAAQS a. Summary of the Proposal The EPA proposed two approaches for this category. The EPA proposed as its preferred approach for areas designated attainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS (as of revocation of the 1997 ozone NAAQS) that the state not be required to adopt an y outstanding applicable requirements for the area for the revoked 1997 standard. This approach was similar to the approach followed in the Phase 1 Rule. The EPA also proposed, in a departure from the Phase 1 Rule, that the approved PSD SIPs for these areas satisfy the obligation to submit an approvable maintenance plan for the 2 008 ozone NAAQS under section 110(a)(1).*** E.O. 12866 Review

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Page 151 of 223 The second, and less preferred, alternative proposed by the EPA for these areas was that the state be required to demonstrate maintenance for the 2008 ozone NAAQS via a “ maintenance showing. ” This maintenance showin g would be due 3 years after the effective date of designations for the 2008 ozone NAAQS and would be in a form other than a formal SIP revision. The maintenance showing would contain a demonstration of continued maintenance of the 2008 ozone NAAQS in the area for 10 years from the effective date of the area’s designation as attainment for the 2008 ozone NAAQS. The EPA committed to providing guidance regarding the specific elements of the maintenance showing if this route were chosen. b. Final Action The E PA is finalizing the preferred option: for areas designated attainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS (as of revocation of the 1997 ozone NAAQS) states are not required to adopt an y outstanding applicable requirements f

or the revoked 1997 standard. Approved PSD SIPs for these areas satisfy the obligation to submit an approvable maintenance plan for the 2008 ozone NAAQS under section 110(a)(1). c. Rationale Areas designated attainment for the 2008 ozone NAAQS and nonatta inment for the 1997 ozone NAAQS (as of revocation of the 1997 ozone NAAQS) have alread y attained the most stringent existing standard , notwithstanding any existing nonattainment designation . These areas thus have developed nonattainment SIPs that in combin ation with federal measures and emissions controls in upwind areas have produced sufficient emissions reductions to achieve air quality that attained both the 1997 ozone NAAQS and*** E.O. 12866 Review

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Page 152 of 223 resulted in an attainment designation for the more protective 2008 ozone NAA QS. They remain subject to the 1997 nonattainment area requirements already approved into the SIP, which can be revised only upon a showing that such revision complies with the anti
backsliding checks in CAA sections 110(l) and 193. G iven the succession of NAAQS of increasing stringency

that has occurred, the EPA believes that the burden of developing an approvable 110(a)(1) maintenance plan for the 2008 ozone NAAQS would outweigh any compensating benefit for an area that is already attaining that NAAQS and that is subject to prior nonattainment requirements which are already incorporated into the SIP and have been sufficient to bring the area into attainment of both the 199 7 and 2008 standards
. d. Comments and Responses Comment: A commenter believed that the EPA should adopt the alternative approach. The commenter stated that an inequit y arises from the fact that areas designated maintenance for the 1997 ozone NAAQS prior to revocation of the NAAQS have contingency

measures that are activated should the area begin to re
- violate the 1997 ozone NAAQS. These areas designated attainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS would not be subject to an y maintenance plans or contingency

measures . Implementing the alternative approac h would address this inequity
. Response: The EPA disagrees with the commenter. The control measures implemented by

these areas and included in their SIPs have already produced sufficient emissions reductions to achieve air quality that not only attained th e 1997 ozone NAAQS, but also resulted in an attainment designation for the more stringent 2008 ozone*** E.O. 12866 Review

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Page 153 of 223 NAAQS. These control measures cannot be modified or removed without a demonstration satisfying section 110(l) and in some cases both sections 110(l) and 19 3. These demonstrations must address not only the 1997 ozone NAAQS but also the 2008 ozone NAAQS as well as any future NAAQS. Comment: One commenter believed both proposed approaches violate the plain language of the CAA by

not requiring the area to submit a 175A maintenance plan, and thus opposed both options. A second commenter believed that the EPA should continue to require formal 10
- ye ar maintenance plan submittals for the 1997 ozone NAAQS from these areas in an attempt to guarantee that controls are n ot relaxed, thus impacting downwind areas. Response: We believe that an approved PSD SIP, in conjunction with the other alread y - existing statutory and regulatory provisions that govern implementation of ozone standards, and the historical safeguards in pla ce for the area adopted for prior NAAQ S , are generally

sufficient to prevent backsliding, and to satisfy the requirement for maintenance under section 110(a)(1). The control measures implemented by these areas and included in their SIPs have already produc ed sufficient emissions reductions to achieve air qualit y that attained the 1997 ozone NAAQS, and resulted in an attainment designation for the more stringent 2008 ozone NAAQS . These control measures cannot be modified or removed without a 110(l) showing and in some cases both a 110(l) and a 193 showing. Areas designated attainment for the 2008 standard remain subject to the attainment and maintenance requirements of that standard. These include continued implementation of the control measures that brought the area into attainment. For these areas, and for an y area designated attainment for the 2008 NAAQS, the CAA’s general*** E.O. 12866 Review

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Page 154 of 223 NAAQS air qualit y management framework and associated regulatory provisions continue to apply , and serve as the foundation for handling an y potential future issues with maintaining the 2008 NAAQS. 3. Areas Designated Nonattainment for the 2008 Ozone NAAQS and Maintenance for the 1997 Ozone NAAQS a. Summary of the Proposal The EPA proposed that for these areas, the area’s approved section 175A maintenance plan for the revoked 1997 ozone NAAQS would satisfy the obligation to submit a second approvable maintenance plan under section 175A for the revoked 1997 ozone NAAQS. b. Final Action The EPA is finalizing this as proposed. c. Rati onale All areas in this group are alread y subject to an approved section 175A maintenance plan for the revoked 1997 ozone NAAQS and have been redesignated to attainment for the 1997 ozone NAAQS. As explained elsewhere, the approval of the redesignation re quest and of the section 175A maintenance plan for the 1997 ozone NAAQS required the EPA to determine that an y anti
- backsliding requirements of these areas for the 1997 standard, as well as any requirements that might be applicable for the 1
- hour standard, have been met. Thus the EPA’s approvals of the redesignation request and the maintenance plan for the 1997 standard signify not onl y that all applicable requirements for the 1997 ozone NAAQS have been met, but also that all applicable anti
backsliding mea sures for the 1
- hour standard have been adopted and approved into the*** E.O. 12866 Review

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Page 155 of 223 SIP. No revision to the section 175A maintenance plans for these areas can be approved unless it complies with the anti
- backsliding checks in CAA sections 110(l) and 193. These areas are also designated nonattainment for the more stringent 2008 ozone NAAQS and therefore are subject to nonattainment NSR and other nonattainment requirements for their classification under the more stringent 2008 ozone NAAQS. Thus, the EPA believes that the re is no justification for a second 175A maintenance plan to be imposed on these areas solely because at one time they were designated nonattainment under a revoked ozone NAAQS. d. Comments and Responses Comment: A commenter that supported the EPA’s approach indicated that the proposed regulatory

text for areas designated non attainment for the 2008 ozone NAAQS and maintenance for the 1997 ozone NAAQS, located in 51.1105(a)(2), should be modified in line with text i n section 51.1105( a )(4) to allow maintenance plans to be modified consistent with CAA sections 110(l) and 193. Response: The EPA agrees that the text regarding areas designated maintenance for the 1997 ozone NAAQS should be modified. The regulatory text h as been adjusted to reflect that maintenance plans can be modified pursuant to CAA sections 110(l) and 193. Comment: One commenter indicated that a second 10
- ye ar 175A maintenance plan was needed b y these areas. The commenter maintained that the EPA’s prop osed approach does not demonstrate continued maintenance. The commenter stated that an area designated nonattainment for the 2008 ozone NAAQS should prepare a second maintenance plan to assure maintenance and set conformity budgets. Another commenter oppos ed the proposal because the CAA clearl y requires two 10
- ye ar maintenance plans.*** E.O. 12866 Review

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Page 156 of 223 The fact that the area is designated nonattainment under the 2008 ozone NAAQS is no guarantee that there will be no increase in ozone violations. The commenter suggested that the EPA review the record for areas violating a NAAQS for which it had been redesignated to attainment with an approved maintenance plan. Waiving the requirements of a second 10
- ye ar maintenance plan as described in CAA section 175A(b) without support is ar

bitrary and undermines the protections of the Act. Response: The EPA recognizes that the approved 175A maintenance plan for the 1997 ozone NAAQS can only be modified via a section 110(l) and, where appropriate, a section 193 showing. These anal ys es would h ave to demonstrate that an y revisions to the maintenance plan would not interfere with the ability to demonstrate timel y attainment for the new standard. The removal of the requirement for the second 10
- year plan for maintenance of a revoked, less stringent standard that the areas previousl y attained allows states to focus planning and control efforts on attaining and maintaining the more stringent and currently

applicable 2008 ozone NAAQS in these areas, for the already attained 1997 ozone NAAQS
. The areas will remain subject to the MVEBs established in the approved 175A maintenance plan until such time that MVEB s for the more stringent 2008 ozone NAAQS are submitted and are found adequate or are approved , which must be used for transportation conf ormity determinations under the 2008 ozone NAAQS pursuant to the conformity regulations
. 4. 2008 Nonattainment Areas Also Designated Nonattainment for a Prior Revoked Ozone NAAQS a. Summary of the Proposal*** E.O. 12866 Review

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Page 157 of 223 The EPA proposed that areas designated nonattai nment for the 2008 ozone NAAQS and also designated nonattainment for the 1997 ozone NAAQS as of the revocation of the 1997 NAAQS 89 will be subject to applicable anti
- backsliding requirements for the applicable prior NAAQS as set forth in 51.1100(o), as well as the pertinent requirements for the current 2008 ozone NAAQS. In addition, if a state seeks to revise an y measure already approved into its SIP for any prior standard, the revision must comply with the anti
- backsliding checks in CAA sections 110(l) and 193. b. Final Action The EPA is finalizing this as proposed. In an area designated nonattainment for the 2008 ozone NAAQS and nonattainment for the 1997 ozone NAAQS at the time of revocation of the 1997 ozone NAAQS the state will be obligated to implement the applicable requirements set forth in 51.1100(o) for the 1997 ozone NAAQS. This could include, as applicable, anti
- backsliding requirements associated with the revoked 1
- hour NAAQS if the area was also designated nonattainment for the 1
- hour ozone NAAQ S when that NAAQS was revoked. N onattainment NSR applies in these areas in accordance with their highest nonattainment classification under an y ozone standard for which they

are (or were at the time of revocation) designated nonattainment. Also, if

89 We do not include in these groups an y areas that were redesignated to attainment for the 1997 ozone NAAQS prior to revocation of that NAAQS. In order to be redesignated for the 1997 ozone NAAQS, the area had to satisfy all applicable anti
- back sliding requirements for the 1
- hour ozone NAAQS. An y 1997 ozone NAAQS nonattainment area that was designated nonattainment for the 1
- hour ozone NAAQS at time of revocation of the 1
- hour NAAQS had to meet applicable 1
- hour ozone NAAQS anti
backsliding requi rements in order to be redesignated to attainment for the 1997 ozone NAAQS.*** E.O. 12866 Review

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Page 158 of 223 these areas are classified Severe or Extreme at the time of revocation for a prior standard, the requirements of section 185 in relation to that prior standard continue to apply
. c. Rationale The EPA believes that the application of anti
- backsliding principles is very clear cut for th is category of areas. These areas remain subject to the applicable requirements for the 2008 ozone NAAQS, as well as for an y of the revoked ozone NAAQS for which the areas remained nonattainment, until the requirements are satisfied or suspended as detailed in sections IV.D and IV.E. The EPA received no adverse comments on this approach
. D. Satisfaction of Anti

- backsliding Requirements for an Area 1. Summary of the Proposal The EPA proposed two acceptable procedures through which a state may demonstrate that it is no longer required to adopt any additional applicable requirements for an area which have not alread y been approved into the SIP for a revoked ozone NAAQS. Both procedures allow a state to remove or revise the nonattainment NSR provisions in the SIP and, upon a showing of consistency with the anti
- backsliding checks in CAA sections 110(l) and 193 (if applicable), shift requirements which are contained in the active portion of the SIP to the contingency measures portion of the SIP
. 90

90 Nonattainment NSR is not required to be retained in the SIP as a contingency measure. In areas designated attainment , the PSD permitting program applies rather than nonattainment NSR. Replacement or removal of an area’s NSR SIP provisions does not relieve sources in the area of their obligations under previousl y established permit conditions.*** E.O. 12866 Review

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Page 159 of 223 The first of the proposed procedures is formal redesignation of the area to attainment for the 2008 ozone NAAQS. For areas subject to anti
- backsliding requirements for revoked standards, approval of a request for redesignation to attainment for the 2008 ozone NAAQS signifies that the state has satisfied its obligations to adopt anti
- backsliding requirements for the revoked standards. This is an extension of the approach that the EPA adopted in the Phase 1 Rule. The EPA proposed that once the area is redesignated and the requirement(s) for nonattainment NSR for the 2008 ozone NAAQS and for an y prior ozone NAAQS cease to apply, the state may request that the corresponding nonattainment NSR requirements be removed from the SIP rather than be retained as a maintenance plan contingency measure. 91 The state would instead implement the PSD program. The second of the proposed procedures for satisfying anti
- backsliding requirements was a new separate route referred to as a “redesignation substitute” f or a rev oked standard . T his redesignation substitute showing would serve as a successor to redesignation to attainment, for which the area would have been eligible were it not for revocation. The showing is based on the CAA’s criteria for redesignation to attainment [ CAA section 107(d)(3)(E) ]
. States would have to demonstrate that the area has attained the relevant standard and met all of the requirements for redesignation. After notice
- and
comment rulemaking on this showing, the EPA approval of the showing would have the same eff ect on the area’s nonattainment anti
- backsliding obligations as would a redesignation to attainment for the revoked standard. The EPA did not propose to require
91 States in the OTR may not use this flexibility

because the CAA requires all areas of th e OTR including attainment areas to implement, at a minimum, the nonattainment NSR requirements prescribed for Moderate areas.*** E.O. 12866 Review

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Page 160 of 223 states to go through formal SIP submission procedures to submit a request for approval of a red esignation substitute because it is not a redesignation. The EPA proposed that such an area would no longer be subject to an y remaining applicable anti
- backsliding requirements and the nonattainment NSR requirements associated with the revoked NAAQS for wh ich the area completed a redesignation substitute would be lifted, leaving the remaining NSR requirements to be determined by the highest remaining classification the area is subject to, whether for the 2008 ozone NAAQS or another revoked NAAQS for which the EPA had not approved a redesignation showing
. 2. Final Action The EPA is finalizing both routes as acceptable ways to address anti
- backsliding requirements. That is, states can choose either to submit a request to redesignate to attainment for the mos t current NAAQS with an approved 175A maintenance plan that addresses the current and revoked NAAQS, or to submit a redesignation substitute request for a revoked NAAQS. Under both of the these procedures, a state seeking to revise its SIP to remove anti
- b acksliding measures from the active portion of its SIP must demonstrate, pursuant to section 110(l), that such revision would not interfere with attainment or maintenance of an y applicable NAAQS, or an y other requirement of the CAA. 92 3. Rationale The first of the procedures, formal redesignation of the area to attainment for the 2008 ozone NAAQS, is an extension of the approach that the EPA adopted in the Phase 1
92 Li kewise , to the extent that a SIP revision seeking to remove anti
- backsliding measures modifies control requirements subject to section 193, the revision would also have to satisfy the requirements of that provision.*** E.O. 12866 Review

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Page 161 of 223 Rule. Redesignation to attainment for the 2008 ozone NAAQS would allow a state to terminate and remove from the active portion of its SIP any applicable anti
- backsliding requirements, including nonattainment NSR requirements associated with its classifications under the 2008 ozone NAAQS, or under the 1997 or 1
- hour ozone NAAQS, except for areas in the OTR. The area would instead need, at a minimum, to implement the PSD program. This approach is consistent with the EPA’s longstanding interpretation of nonattainment NSR requirements for areas that are redesignated to attainment. 93 Redesignation to attai nment would also terminate an y obligations to implement section 185 fee programs in a Severe or Extreme area for the 2008 or prior revoked 1997 or 1
- hour ozone NAAQS pursuant to the express terms of CAA section 185. Approval of a redesignation to attainme nt for the 2008 ozone NAAQS signifies that the state has satisfied its obligations to adopt anti
- backsliding requirements for the current and revoked standards for that area. This same approach was used in the Phase 1 Rule in requiring redesignations for the 1997 ozone NAAQS to address anti
- backsliding requirements for the revoked 1
- hour standard. Approval of the section 175A maintenance plan for the 2008 ozone NAAQS assures that the area’s SIP includes the provisions necessary for maintenance of the 2008 o zone NAAQS, which is the most stringent of the NAAQS. Therefore, upon redesignation to attainment and approval of its plan for maintenance of the 2008 ozone NAAQS, an area will have satisfied its obligations to adopt anti
- backsliding requirements. All of the anti
- backsliding measures that have been
93 See 40 CFR 51.905(a)(3), the comparable provision for transition from the 1
- hour NAAQS to the 1997 ozone NAAQS, which allows states with such areas to request that the 1
- hour nonattainment NSR provisions be removed from the SIP.*** E.O. 12866 Review

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Page 162 of 223 approved into the SIP must continue to be implemented unless or until the state can show that such implementation is not necessary for maintenance, consistent with section 110(l) and section 193 if applicable. 94 Experience has shown the EPA that a second mechanism for areas to address the requirements imposed b y anti
- backsliding requirements is also appropriate . After revocation of the 1997 ozone NAAQS, areas that attain and meet requirements for the revoked 1997 or 1
- hour ozone NAAQS would be disadvantaged relative to areas that were redesignated to attainment for those standards prior to their revocation. Absent this second mechanism, areas that would otherwise have qualified for redesignation to attainment for the 1997 or 1
- hour ozone NAAQS, were it not for revocation of those NAAQS, would need to continue implementing potentially outdated and onerous requirements for a NAAQS they have attained until they

also qualify

for redesignation to attainment for the more stringent 2008 ozone NAAQS. The EPA believes that, under an y view of anti
- backsliding for a revoked standard, it should not mean imposing requirements greater than those that would apply if the standard had not been revoked. Th e EPA has no mechanism for formall y redesignat ing areas for a revoked standard. However, b y establishing the redesignation substitute, the EPA is providing a pathway for states to demonstrate and for the EPA to acknowledge that they have satisfied the applicable requirements for the revoked 1
- hour or 1997 ozone NAAQS by submitting a showing that functions as a substitute for redesignation to attainment for that
94 This showing may

be submitted to the EPA at the same time as the maintenance plan, and may be approved b y the EPA in a single action. Subject to this process, anti
backsliding requirement s contained in the SIP could be shifted to the contingency measures portion of a section 175A maintenance plan, or, in limited circumstances (such as nonattainment NSR) removed from the SIP.*** E.O. 12866 Review

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Page 163 of 223 revoked standard, and ensures that the substance of the redesignation requirements are met. For a revok ed standard, this second mechanism will serve as a successor to redesignation to attainment, for which the area would have been eligible were it not for revocation. The EPA believes this is an acceptable approach because it is based on the CAA’s criteria for redesignation to attainment [ CAA section 107(d)(3)(E) ] . A showing would include: attainment of the relevant revoked 1
- hour or 1997 ozone NAAQS; a showing that attainment was due to permanent and enforceable emissions reductions; and a demonstration th at the area can continue to maintain the standard over the next 10 y ears. Redesignation criteria in section 107(d)(3)(E)(ii) and (v) would be met b y the existing approved SIP, under which the area has attained the revoked standard, in the context of (and r einforced by) the requirements for the new 2008 ozone NAAQS. The EPA will conduct notice
- and
- comment rulemaking on the state’s showings. We believe a notice
and
- comment process fulfills the function of redesignation to attainment for the purpose of satisfying anti
- backsliding requirements for a revoked standard. The EPA believes that requiring more elaborate administrative procedures for purposes of approving a state's request for a redesignation substitute for a revoked NAAQS (for example, requiring state s to use the formal SIP adoption process) would needlessl y impose burdens because the area will remain subject to all the formal requirements for redesignation to attainment for the 2008 ozone NAAQS. Development of SIP revisions takes time and imposes admi nistrative costs on states, industry and the public. As in the case of a redesignation to attainment for the 2008 ozone NAAQS, at the time of submitting a redesignation substitute request or at an y time thereafter, a state may*** E.O. 12866 Review

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Page 164 of 223 request to revise its SIP so as to cease implementing a specific nonattainment SIP requirement. However, this request could not be granted, and the SIP revised, until the EPA approves the redesignation substitute and a demonstration that the SIP revision meets the requirements of section 110(l). The EPA is not providing this mechanism for the purpose of allowing states to relax or avoid air quality management measures that are needed for attainment and maintenance of the 2008 ozone NAAQS. The showings required, the provisions of section 110(l), and the fact that the area remains subject to CAA requirements for the more stringent 2008 ozone NAAQS, assure that is not the case. It is, however, important to relieve states of requirements that are no longer necessary , or that can be replaced b y other forms of protection that might better meet the local needs and circumstances of an area
. The EPA is providing in the redesignation substitute option a mechanism that demands m ore than a determination of attainment of the prior NAAQS , and calls for a showing that addresses redesignation criteria for that NAAQS . Moreover , the process under this option occurs while the state remains subject to ongoing requirements to meet the new more stringent standard in that area . In this context, th is final action is clearl y sufficient for its limited anti
- backsliding purpose

— it recognizes and supports the state’s progress in having attained the prior standard in that area due to permanent and enforceable emissions reductions, and reinforces continued attainment by calling for a demonstration that the area can maintain the revoked standard. 4. Comments and Responses*** E.O. 12866 Review

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Page 165 of 223 Comment: Several commenters requested that the EPA preserve the statutory mech anism as described in 42 U.S.C 7407(d)(3) that would allow the EPA to redesignate areas for a revoked NAAQS. Response: After the revocation of a standard , the EPA believes that it can no longer take action to reclassify or to redesignate areas for that standard. Revocation of the standard removes both classifications and designations for the revoked standard. The EPA believes the two mechanisms provided in the final rule accomplish the goals of 42 U.S.C 7407(d)(3) [ CAA section 107(d)(3) ] in a manner consistent with anti
- backsliding principles and appropriate for the circumstance where a more stringent NAAQS with the same form and averaging time exists and is being activel y implemented. Comment: A commenter argued that redesignation to att ainment for the 2008 ozone NAAQS is not sufficient to turn off anti
- backsliding obligations triggered under the revoked 1
- hour or the 1997 ozone NAAQS. Response: The EPA disagrees with the commenter. When the EPA approves a redesignation request for the current 2008 ozone NAAQS, we assess whether the area is in attainment for the current and previous NAAQS. The maintenance plan submitted by the state demonstrates that the area being considered for redesignation will continue for the next 10 y ears to attain the standard that is requisite to protect public health, and that attainment is due to permanent and enforceable emissions reductions. A redesignation to attainment signifies that the area has met the requirements of the 2008, as well as any revoked, NAAQS . CAA section 185 specifically indicates redesignation “as an attainment area for ozone” as a basis for terminating fee requirements. Also, redesignation to attainment historically has terminated nonattainment NSR requirements,*** E.O. 12866 Review

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Page 166 of 223 which are not required to be kept in the SIP as contingency measures. See Greenbaum v. EPA ( 370 F.3d at 536 ). Moreover, redesignation for the current standard was the unchallenged basis for demonstrating satisfaction of anti
- backsliding requirements in the EPA’s previous Phase 1 anti
- backsliding regime (69 FR 23951) . We believe the application of the same principle when transitioning from the 1997 to the 2008 ozone NAAQS is an even better fit: it is impossible to attain the 2008 ozone NAAQS without first achieving air quality that wou ld attain the 1997 ozone NAAQS due to the identical form of the two standards. Comment: A number of commenters supported the concept of the redesignation substitute, but requested that a more streamlined process be developed. Several commenters suggested that a clean data determination would be sufficient to terminate anti
- backsliding requirements for a revoked NAAQS. Response: The EPA recognizes that a clean data determination alone is less burdensome for states than a section 107(d)(3) redesignation or a redesignation substitute. A clean data determination only suspends planning requirements associated with the NAAQS for which the determination was granted. However, we believe that the redesignation and redesignation substitute mechanisms represent the min imum set of requirements sufficient to demonstrate satisfaction of anti
- backsliding requirements under the EPA’s application of the principles of section 172(e). These mechanisms provide a way for states to demonstrate that they have attained these standar ds, they have met all the requirements for redesignations, and no longer need an y anti
- backsliding requirements bey ond those already approved in their SIPs.*** E.O. 12866 Review

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Page 167 of 223 Comment: Two commenters asked the EPA to reconsider the use of CAA section 172(e). One of these com menters asked that the use of 172(e) be applied to all applicable requirements required of areas subject to anti
- backsliding allowing them to substitute measures at least as stringent as the controls listed. The other commenter believed no application of 1 72(e) is justified, even to section 185 fees where the EPA has historically applied this principle. Response: CAA section 172(e), which addresses relaxations of a NAAQS, requires protections for areas that have not attained a NAAQS prior to a relaxation, b y requiring controls that are “not less stringent” than the controls applicable in nonattainment areas prior to any such relaxation. The EPA applied these principles in developing previous guidance on satisfying the anti
- backsliding approach for CAA sectio n 185 requirements. As stated in previous EPA guidance, w e interpret the principles of 172(e) as authorizing, but not requiring, the Administrator to approve on a case
- by
case basis “not less stringent” alternatives to the applicable section 185 fee program requirements associated with a revoked ozone NAAQS. 95 The NRDC challenged this guidance in 2010. Although the court vacated the 2010 guidance memorandum on procedural grounds, it did not prohibit alternative programs, stating that “neither the statute nor our case law obviously precludes that alternative.” See NRDC v. EPA , 643 F.3d 332 (D.C. Cir. July

2011 ). We believe the application of section 172(e) principles to applicable section 185 anti
- backsliding requirements is an appropriate and reasonable use of the Administrator’s discretion to approve “not less stringent” controls. However, we
95 Memo from Stephen D. Page to Regional Air Division Directors, Jan. 5, 2010, “Guidance on Developing Fee Programs Required by Clean Air Act Section 185 for the 1
- Hour Ozone NAAQS.”*** E.O. 12866 Review

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Page 168 of 223 did not propose and do not intend at this time to promulgate regulatory language to appl y principles of section 172(e) to other anti
- backsliding requirements. E
. How will the EPA’s determination of attainment (“Clean Data”) regulation apply for purposes of the anti

- backsliding requirements? 1. Summary of the Proposal The EPA proposed to apply the same approach with respect to determinations of attainment for the 2 008 ozone NAAQS as applied under the 1997 ozone NAAQS under 40 CFR 51.918. Under 40 CFR 51.918, an EPA determination that an area attained the 1997 ozone NAAQS suspended the obligation to submit any attainment
- related SIP planning elements for the 1997 ozo ne NAAQS not y et approved in the SIP, for so long as the area continued to be in attainment of that NAAQS. 96 Inorder to reflect the ongoing status of the Clean Data Policy and to consolidate in one regulation a comprehensive provision applicable to determi nations of attainment for all current and former ozone NAAQS, the EPA proposed to replace 40 CFR 51.918 with proposed 40 CFR 51.1118 after revocation of the 1997 ozone NAAQS. 2. Final Action The EPA is finalizing its proposed approach to implementing the Clean Data Policy with respect to the 2008 ozone NAAQS and all prior ozone NAAQS . Under the EPA’s Clean Data Regulation, a determination of attainment suspends the obligation to
96 The EPA initially

issued the Clean Data Policy in 1995, "Reasonable Furth er Progress, Attainment Demonstration, and Related Requirements for Ozone Nonattainment Areas Meeting the Ozone National Ambient Air Quality Standard." Memorandum from John S. Seitz, Director, Office of Air Quality Planning and Standards, May 10, 1995. For purposes of the 1997 ozone NAAQS, we codified that policy at 40 CFR 51.918. This codified policy

was upheld by

the D.C. Circuit in NRDC v. EPA 571 F.3d 1245 ( D.C. 2009).*** E.O. 12866 Review

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Page 169 of 223 submit certain attainment
- related planning requirements for the associated NAA QS for an area as long as the area continue s to attain that standard. 97 For those areas that have alread y incorporated measures into their approved SIPs that satisfy the nonattainment requirements for that standard, section 110(l) functions as an anti
- backsliding check to require continued implementation of such measures unless revised in accordance with its provisions. The planning elements that may be suspended under section 51.1118 are the same as those suspended under existing section 51.918 : RFP requirements, attainment demonstrations, RACM, contingency measures and other state planning requirements related to attainment of the relevant standard. For a Severe or Extreme area, a section 185 fee program is expressly linked by the statute itself t o an attainment plan ; therefore suspension of the obligation to submit the attainment plan also necessaril y suspends the obligation to submit the fee program which is part of the attainment plan (provided that the EPA has not alread y determined that the ar ea failed to attain by its attainment deadline and thus triggered the obligation to implement a fee program ). The EPA notes that a determination of attainment would not, however, suspend obligations to submit
non - planning requirements such as nonattainment NSR, subpart 2 RACT or emission inventories under section 182(a)(1). 3. Rationale

97 Depending on the area’s classification for the 1997 ozone NAAQS and the SI P element s alread y approved, the area may still have outstanding non - planning 1997 anti
backsliding submission requirements that are not suspended by 51.918 ( e.g. , emissions inventories, nonattainment NSR, Subpart 2 RACT requirements).*** E.O. 12866 Review

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Page 170 of 223 Section 51.1118 applies essentially the same language as 51.918. Upon revocation of the 1997 ozone NAAQS, this section would be applicable to determinations of attainment f

or all ozone NAAQS: the 2008, 1997 and the alread y revoked 1
- hour ozone NAAQS. With the finalization of 51.1118, the EPA’s long
- standing Clean Data Policy , which has been upheld by the D.C. Circuit and all other courts that have considered it, is embodied in a regulation applicable for the purpose of all existing and prior ozone NAAQS. The EPA believes that continuation of this approach makes the most sense for implementing the 2008 ozone NAAQS. 4. Comments and Responses Comment: Two commenters indicated th at a determination that an area has “clean data” for the more
- stringent 2008 ozone NAAQS should be sufficient to lift anti
backsliding requirements for the 1997 and the 1
- hour ozone NAAQS. Response: A clean data determination only suspends specific planning requirements, not mandatory control requirements , which could include, as applicable, anti
- backsliding requirements associated with revoked NAAQS. As explained previously , the EPA believes that an approved redesignation to attainment or a redesign ation substitute is necessary

to lift anti
- backsliding requirements . Section 51.1118 clarifies that a clean data determination for a specific standard only affects attainment
- related planning requirements for that standard. Comment: A commenter requested that the EPA clarify language in the proposed section 51.1118 to indicate more specificall y which NAAQS must be attained to suspend planning requirements.*** E.O. 12866 Review

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Page 171 of 223 Response: The EPA will revise the language in 51.1118 to make it clear that a clean data determination for the 2008 NAAQS acts to suspend planning requirements associated with the 2008 and less stringent 1997 ozone NAAQS , which have an identical form
. F . W hat is the relationship between implementation of the 2008 ozone NAAQS and the CAA title V permits program? 1. Summary of the Proposal W e proposed , and solicited comment on, two alternative approaches for implementing the title V permit program for sources in areas designated nonattainment for the 2008 ozone NAAQS and subject to anti
- backsliding requirements for a prior ozone NAAQS
. The EPA co
- proposed two approaches to interpreting title V applicability requirements following revocation of the 1997 ozone NAAQS : (1) major source thresholds for title V should be the same as the majo r source thresholds applicable for purposes of other requirements such as RACT and NSR; and (2) major source thresholds for title V depend solel y on the area’s classification for the 2008 ozone NAAQS
. The EPA specificall y solicited comments on whether titl e V should (or should not) be considered a “control” within the meaning of section 172(e) in light of the fact that title V generall y does not impose new substantive air quality control requirements but is intended to assure compliance with all such existi ng requirements. 2. Final Action We are finalizing the first option and the associated proposed revisions to parts 70 and 71 . F ollowing revocation of the 1997 ozone NAAQS, major source thresholds for*** E.O. 12866 Review

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Page 172 of 223 title V will be the same as the major source 98 thresholds applicable for purposes of other requirements , such as RACT and NSR ( i.e. , the major source threshold associated with the more stringent of the area’s classification for the 2008, 1997 and/or 1
- hour ozone NAAQS will be the applicable threshold for title V purposes, to the extent that anti
backsliding requirements for the 1997 and/or 1
- hour ozone NAAQS appl y i n the area)
. 99 3. Rationale The EPA received a wide range of comments on the question of whether the major source thresholds for title V per mitting should be considered a “control” for purposes of the anti
- backsliding requirements of section 172(e). The EPA recognizes that many of these comments raise valid perspectives. It is true that title V generally does not impose new substantive polluti on control requirements on sources, and thus ordinarily the EPA would not describe title V permitting itself as a “control.” At the same time, the
98 One of the way s a source can become subject to title V is as a “major source.” See CAA section 502(a); 40 CFR 70.3; 71.3. Furthermore, the definition of “major source” for purposes of title V includes, but is not limited to, a “major stationary source as defined ... in part D” of title I
. ( The EPA notes that sources can become subject to title V permitting for other reasons, and nothing in this discussion is intended to suggest that changes in an area’s classification would affect those other provisions of t itle V. Accordingl y, sources subject to title V under other provisions would remain subject to title V for those independent reasons .) See CAA section 501(2)(B) and 502(a) ; 40 CFR 70.2; 71.2. Thus, changes in an area’s classification ( e.g. , from “Serious” to “Severe”) by changing the emissions threshold for being deemed a major source ( e.g. , from 100 tpy to 50 tpy of a relevant pollutant) can result in changes in title V applicability for a source. 99 Itshould be noted that, pursuant to CAA section 503(a), a source is subject to a permit program on the later of the date that it becomes a major source and the effective date of a permit program applicable to the source. Thus, if a permitting authorit y with an approved title V program lacks an y authority to p ermit certain sources that are major sources subject to title V as a result of ozone precursor emissions and an area classification for ozone that has a major source threshold lower than 100 tpy ( e.g. , “Serious”) then there is no title V permit program “ap plicable to the source” and those sources have no obligation to apply for a title V permit until after such time as a permit program becomes applicable to them. The EPA will work with s tates to ensure that all approved title V programs are adequate under the CAA
.*** E.O. 12866 Review

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Page 173 of 223 EPA does believe that one of the underlying purposes of title V is to assure compliance with the pollution co ntrol requirements applicable to a source. Thus, it may well be true that title V provides air quality benefits, and should be considered a “control” under the broad, functional anal ys is used by the court in the South Coas t v. EPA decision. The EPA believe s it is unnecessary to resolve this precise question at this time, because the EPA believes that regardless of whether t itle V should be considered a “control” for purposes of section 172(e), it fulfils the purposes and requirements of the Act for title V permitting thresholds to be the same as the permitting thresholds for underl yi ng applicable requirements, particularly NSR which was considered a control by the South Coast court . Title V and NSR have long shared a common approach to the definition of major
source. 100 , 101 The EPA concurs with the commenters, such as Texas and New York, who believe that we should maintain clarit y and uniformity in major source threshold determinations for both NSR and t itle V. In addition, the EPA notes that, under CAA sec tion 502, sources are required to operate in accordance with the terms of a t itle V permit if, inter alia , the source is a major
source or the source is required to have a permit under part D of Title I. Thus, even if a source is not a major source for pur poses of t itle V, it is still required to get a t itle V permit if it is required to have a permit under part D of t itle I . This provides additional support to the EPA’s conclusion that the major source permitting threshold for NSR and RACT should be the same as for t itle V because otherwise, a source that is not a “major
100 The EPA recognizes that there are statutory and regulatory

differences between title V and NSR, but for purposes of the discussion we are focusing on the commonalities. 101 See, e.g. , Memorandum from Lydia N. Wegman, Deputy Director, Office of Air Quality Planning and Standards, U.S. EPA, ‘‘Definition of Regulated Air Pollutant for Purposes of Title V’’ (Apr il 26, 1993).*** E.O. 12866 Review

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Page 174 of 223 source” for purposes of t itle V might not understand it is still covered b y the applicability provisions of parts 70 and 71, if it is required to have a permit under p art D of t itle I
. Ma intaining consistency

between the NSR and t itle V thresholds in this regard will promote compliance with CAA requirements by providing a simpler permitting regime, ensuring that sources subject to major source NSR understand they are also subject to t itle V, and enabling permitting authorities to identify sources that are potentially

subject to major source NSR. The EPA believes a contrary approach would introduce not only

complexity , but anomalies, into the permitting program that would be contrary to the purposes and requirements of the Act. As noted by commenters option 1 is supported by

the fact that these thresholds emanate from the same provisions of the CAA (p art D of t itle I), therefore, the intent of the CAA was presumabl y to keep the thresholds the same. To promote effective program implementation and ensure consistency with the CAA , this final rule will amend the relevant provisions of parts 70 and 71 related to application of title V thresholds
. 4. Comments and Responses Comment: Several commenters supported the first option, which sets major source title V thresholds equal to those applied for RACT and NSR. One of these commenters supported the first option with the minor conforming amendments to the definition of major source in 40 CFR 70.2 and 71.2 as detailed on p age 34225 of the proposal
. C ommenter s stated that this approach would provide applicants with clarity and uniformity

regarding applicable major source thresholds , and that this approach maintains the consistency

which will ultimately

simplify permitting and enforcement. A c ommenter indicated that o ption 1 is supported by the fact that these thresholds emanate from the*** E.O. 12866 Review

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Page 175 of 223 same provisions of the CAA (p art D of title I), therefore, the intent of the CAA was to keep the thresh olds the same. Several commenters noted that the first approach is consistent with past precedent and compelled b y the Act’s anti
- backsliding requirements as well as court precedent. Response: As discussed previously , the EPA agrees with these commenters that the major source threshold for title V should be the same as the major source threshold for NSR and RACT, and the EPA is finalizing the proposed revisions to parts 70 and 71 to make that clear. Comment: Several commenters supported the second approach, in which the major source thresholds for title V permitting are based solel y on an area's classification for the 2008 ozone NAAQS. Commenters cited a number of reasons for this, including: this approach would provide relief to small operators, and that this approach makes good sense in a time of resour ce constraints. Several commenters questioned the utility of setting title V levels based on a revoked NAAQS. Several commenters also commented that EPA’s understanding of the impacts of the South Coast v. EPA decision is not correct. These commenters agre ed that the classifications of revoked NAAQS can impact the NSR level, but disagreed with the EPA that the title V levels are controlled by any thing other than the current 2008 ozone NAAQS. Response: The EPA recognizes that the approach being adopted does not solely rely on the area’s current classification for purposes of determining major source thresholds for title V. However, even assuming section 172(e) does not directly make title V a “control” for p urposes of anti
- backsliding, the EPA believes there is ambiguity in the intersection between title V and p art D as to whether title V should apply the major*** E.O. 12866 Review

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Page 176 of 223 source threshold of the area’s current classification, or the area’s classification for purposes of NSR and other underl yi ng applicable requirements, when that threshold would be lower. As discussed previously , the EPA believes that it is appropriate under the CAA, and consistent with the EPA’s longstanding approach to these programs, for a source which is considered to be “major” for purposes of NSR to also be considered “major” for purposes of t itle V. For the reasons stated previously , the EPA believes maintaining consistency

in the major source applicability of the two programs is the best approach t o promote consistency and compliance with the purposes and requirements of the CAA . Additional information can be found in the Response to Comment s document. Comment: The EPA received a wide range of comments on the question of whether the major source thr esholds for title V permitting should be considered a “control” for purposes of the anti
- backsliding requirements of section 172(e). Several commenters believed that title V should be considered as a control within the meaning of section 172(e). One commenter stated that t itle V permits represent “controls” for purposes of the Act’s anti
- backsliding requirements and, as such, the EPA should abide by South Coast v. EPA and use the same major source thresholds for administering the t itle V permit program as the a genc y proposes to for the NSR and RACT programs. The commenter stated that t itle V permits serve as independently enforceable compliance assurance mechanisms that constrain emissions by sources and accordingly should be
seen a s control measures . S ince t itle V permits collect multiple control requirements in one document, there is no reason for the a gency to depart from South Coast v. EPA and treat t itle V permitting classifications differently than, for example, NSR permitting.*** E.O. 12866 Review

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Page 177 of 223 A number of commenters stated that the title V program is not a control in and of itself . One commenter stated that the EPA has consistently stated that title V is a separate program when compared to the requirements of title I . Several commenters stated that the history of title V rulemaking is clear on this point, indicating that the EPA has stated repeatedly

that no substantive controls are imposed simply by having a title V permit. Title V should not be considered a “control” in light of the fact that title V is not intended to impose new substantive air qualit y control requirements but is instead intended to assure compliance with all existing applicable requirements. Response: The EPA recognizes that both sets of comments raise valid perspectives. It is true that t itle V generall y does not impose new substantive pollution control requirements on sources, and thus ordinarily the EPA would not describe t itle V permitting itself as a “control.” At the same time, the EPA does believe that one of the under lying purposes of t itle V is to improve compliance with the pollution control requirements applicable to a source, and thus it may well be true that t itle V provides air quality benefits, and should be considered a “control” under the broad, functional
ana ly sis used by

the court in the South Coast v. EPA decision. The EPA believes it is unnecessary

to resolve this precise question at this time, because the EPA believes that regardless of whether t itle V should be considered a “control” for purposes of secti on 172(e), it fulfills the purposes and requirements of the CAA for title V permitting thresholds to be the same as the permitting thresholds for underl yi ng applicable requirements, particularly NSR. Thus, the EPA is taking final action adopting the interpretation that major source definitions should be the same for both programs. **V. Statutory and Executive Order Reviews***** E.O. 12866 Review

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Page 178 of 223 A. Executive Order 12866: Regulatory Planning and Review and Executive Order 13563: Improving Regulation and Regulatory Review Th is action is a significant regulatory action that was submitted to the Office of Management and Budget (OMB) for review. This action raises novel policy issues **.** Any changes made in response to OMB recommendations have been documented in the docket. B. Paperwork Reduction Act (PRA) The information collection activities in this final rule have been submitted for approval to the O ffice of M anagement and B udget under the PRA . The Information Collection Request (I CR) document that the EPA prepared has been assigned the EPA ICR number 2347.01 and OMB Reference number 201306
- 2060
- 003
. You can find a copy of the ICR in the docket for this rule, and it is briefly summarized here. The information collection requirements are not enforceable until OMB approves them. The EPA is finalizing this 2008 ozone NAAQS SIP Requirements Rule so that states will know what CAA requirements appl y to their nonattainment areas when the states develop their SIPs for attaining and maintaining the NAAQS. The inte nded effect of the SIP Requirements Rule is to provide certainty to states regarding their planning obligations such that states may begin SIP development. For purposes of analy sis of the estimated paperwork burden, the EPA assumed 46 nonattainment areas, 102 some of which must prepare an attainment demonstration as well as submit an RFP and RACT SIP. The attainment demonstration requirement would appear in 40 CFR 51. 1108 which implements CAA subsections 172(c)(1), 182(b)(1)(A) and 182(c)(2)(B). The RFP SI P
102 May 21, 2012, 77 FR 30088.*** E.O. 12866 Review

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Page 179 of 223 submission requirement would appear in 40 CFR 51. 1110 , and the RACT SIP submission requirement would appear in 40 CFR 51. 1112 , which implements CAA subsections 172(c)(1) 182(b)(2),(c),(d) and (e). States should alread y have information from man y emission sources, as facilities should have provided this information to meet 1
- hour and 1997 ozone NAAQS SI P requirements, operating permits and/or emissions reporting requirements. Such information does not generall y reveal the details of production processes. But, to the extent it may , confidential business information for the affected facilities is protected. Specificall y, submissions of emissions and control efficiency information that is confidential, proprietary

and trade secret is protected from disclosure under the requirements of subsections 503(e) and 114(c) of the CAA. The annual burden for this information collection averaged over the first 3 years of this I CR is estimated to be a total of 120,000 labor hours per ye ar at an annual labor cost of $2.4 mill ion (present value) over the 3
- ye ar period or approximately $91,000 per state for the 26 state air agency respondents, including the District of Columbia. The In formation Collection Request Supporting Statement for the 2008 8
- hour Ozone National Ambient Ai r Quality Standard Implementation Rule EPA I CR # 2347.02 in the docket provides the details for the 26 state air agencies that are required to provide the 58 SIP revisions for the 46 areas designated nonattainment for the 2008 ozone standard
. The average annual reporting burden is 690 hours per response, with approximately 2 responses per state for 58 state r esponses from the state air agencies . There are no capital or operating and maintenance costs associated with the proposed r ule requirements. Burden is defined at 5 CFR 1320.3(b).*** E.O. 12866 Review

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Page 180 of 223 Respondents/affected entities: States with 46 nonattainment areas Respondent’s obligation to respond: mandatory ( Clean Air Act, sections 172 and 182) Estimated number of respondents: 26 state respond ents Frequency of response: Once Total estimated burden: 40 ,000 hours (per ye ar). Burden is defined at 5 CFR 1320.3(b). Total estimated cost: $ 2. 4 million (per year), includes $ 0 annualized capital or operation & maintenance costs. An agency may

not conduct or sponsor, and a person is not required to respond to, a collection of information unless it display s 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. When OMB approves this I CR, the Agency will announce that approval in the Federal Register and publish a technical amendment to 40 CFR part 9 to display the OMB control number for the approved information collection activities contained in this final rule. C. 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 . This action will not impose any requirements on small entities. Entities potentially affected directly

by this rule include state, local and tribal governments and none of these governments are small governments. Other ty pes of small entities are not directly subject to the requirements of this rule because this action only

addresses how a SIP will provide for adequate attainment and maintenance of the NAAQS and meet the obligations of the CAA. Although some states*** E.O. 12866 Review

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Page 181 of 223 may ultimatel y decide to impose economic impacts on s mall entities, that is not required by this rule and would only

occur at the discretion of the state . D. Unfunded Mandates Reform Act (UMRA) This action does not contain an y unfunded mandate as described in UMRA, 2 U.S.C. 1531

– 1538, and does not significantly or uniquely

affect small governments. The action implements mandates specifically and explicitly

set forth in [ the Clean Air Act without the exercise of any policy discretion by

the EPA. 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. Executiv e Order 13175: Consultation and Coordination with Indian Tribal Governments This action does not have tribal implications as specified in Executive Order 13175. It would not have a substantial direct effect on one or more Indian tribes, since no tribe has to develop a T IP under these regulatory revisions. Furthermore, these regulation revisions do not affect the relationship or distribution of power and responsibilities between the federal government and Indian tribes. The CAA and th e Tribal Air Rule estab lish the relationship of the federal government and tribes in developing plans to attain the NAAQS, and these revisions to the regulations do nothing to modify that relationship. Thus, Executive Order 13175 does not apply to this action.*** E.O. 12866 Review

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Page 182 of 223 Although Executiv e Order 13175 does not appl y t o this action, the EPA met with tribal officials in developing th e proposal . Meeting summaries are contained in the docket for this rulemaking. G. Executive Order 13045: Protection of Children from Environmental Health and Saf ety Risks The EPA interprets Executive Order 13045 as applying only to those regulatory actions that concern environmental health or safety risks that the EPA has reason to believe may

disproportionately

affect children, per the definition of “covered regu latory action” in section 2
- 202 of the Executive Order. This action is not subject to Executive Order 13045 because it does not concern an environmental health risk or safet y risk. H. Executive Order 13211: Actions Concerning Regulations That Significantly Affect Energy Supply, Distribution or Use This action is not subject to Executive Order 13211, because it is not a significant regulatory

action under Executive Order 12866. I. National Technology Transfer and Advancement Act (NTTA) 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 b y this action will **not** have potential disproportionately high and adverse human health or environmental effects on minority , low
- income or indigenous populations because it does not affect the level of protection provided to human health or the environment.*** E.O. 12866 Review

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Page 183 of 223 The final revisions to the regulations address the substantive requirements for SIPs to attain the NAAQS, which are designed to protect all segments of the general populations. As such, they do not adversel y affect the health or safet y of minority or low
income populations and are designed to protect and enhance the health and safet y of these and other populations. The EPA encourages states to consider an y potential impacts on these populations in developing SIPs to attain the NAAQS
. K. Congressional Review Act (CRA) This action is subject to the CRA, and the EPA will submit a rule report to each House of the Congress and to the Comptroller General of the United States. This action is not a “major rule” as defined by 5 U.S.C. 804(2). L. Determination u nder Section 307(d ) Pursuant to CAA section 307(d)(1)(V), the Administrator determines that this action is subject to the provisions of section 307(d). Section 307(d) establishes procedural requirements specific to rulemaking under the CAA. Section 307(d)(1)(V) provides that the provisions of section 307(d) appl y to “such other actions as the Administrator may determine.” M. Judicial Review Section 307(b)(1) of the CAA indicates which Federal Courts of Appeal have venue for petitions of review of final agency actions by

the EPA under the CAA. This section provides, in part, that petitions for review must be filed in the U.S. Court of Appeals for the District of Columbia Circuit (i) when the agency action consists of “nationally

applicable regulations promulgated, or final ac tions taken, by the Administrator” or (ii) when such action is locall y or regionall y applicable, if “such action*** E.O. 12866 Review

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Page 184 of 223 is based on a determination of nationwide scope or effect and if in taking such action the Administrator finds and publishes that such action i s based on such a determination.” This rule implementing the 2008 ozone NAAQS is “nationally applicable” within the meaning of section 307(b)(1). First, the rulemaking addresses a NAAQS that applies to all states and territories in the U.S. Second, the rul emaking addresses issues relevant to specific existing SIP provisions in states across the U.S. that are located in each of the 10 EPA Regions, numerous federal circuits and multiple time zones. Third, the rulemaking addresses a common core of knowledge an d analy sis involved in formulating the decision and a common interpretation of the requirements of the CAA being applied to SIPs in states across the country . Fourth, the rulemaking, by addressing issues relevant to appropriate SIP provisions in one state, may have precedential impacts upon the SIPs of other states nationwide. Courts have found similar rulemaking actions to be of nationwide scope and effect. 103 Under section 307(b)(1) of the Act, petitions for judicial review of this action must be filed in the United States Court of Appeals for the District of Columbia Circuit by **[INSERT DATE 60 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]**  . An y such judicial review is limited to only those objections that are raised with reasonable specificity in t imely comments. Filing a petition for reconsideration by

the Administrator of this final rule does not affect the finality of this rule for the purposes of judicial review nor does it extend the time within which a petition

103 See, e.g. , State of Texas, et al. v. EPA , 2011 U.S. App. L EXI S 5654 (5th Cir. 2011) (finding SIP call to 13 states to be of nationwide scope and effect and thus transferring the case to the U.S. Court of Appeals for the D.C. Circuit in accordance with CAA section 307(b)(1)).*** E.O. 12866 Review

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Page 185 of 223 for judicial review may

be filed and shall not postpone the effectiveness of such rule or action. Under section 307(b) (2) of the Act, the requirements of this final action may not be challenged later in civil or criminal proceedings brought b y us to enforce these requirements.*** E.O. 12866 Review

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Page 186 of 223 **APPENDI X A TO PREAMBLE**  **GLOSSARY OF TERMS AND ACRONYMS** ACT Alternative Control Techniques (document) AERR Air Emissions Reporting Requirements Rule BACT Best Available Control Technology CAA Clean Air Act CAAAC Clean Air Act Advisory Committee CAIR Clean Ai r Interstate Rule CERR Consolidated Emissions Reporting Rule CFR Code of Federal Regulations CO Carbon Monoxide CSAPR Cross
- State Air Pollution Rule CTG Control Technique Guideline DOT Department of Transportation DV Design Value EMFAC EMissions FACtors (a mobile emissions model) ESRP Emissions Statement Reporting Program EGU Electricity Generating Unit EO Executive Order EPA Environmental Protection Agency FIP Federal Implementation Plan GDF Gasoline dispensing facilities HEDD High Electri c Demand Day ICR In formation Collection Requirement I/M Inspection and Maintenance ( i.e. , smog check) km Kilometers LAER Lowest Achievable Emission Rate MACT Maximum Achievable Control Technology MCR Mid
- course Review MPO Metropolitan Planning Organization NAAQS National Ambient Air Quality Standards NO x Nitrogen Oxides NPRM Notice of Proposed Rulemaking NSR New Source Review NTTAA National Technology Transfer and Advancement Act of 1995 OMB Office of Management and Budget OTR Ozone Transport R egion ORVR Onboard refueling vapor recovery PM Particulate Matter PM 2.5 Fine Particulate Matter ppb Parts per Billion ppm Parts per Million PSD Prevention of Significant Deterioration RACM Reasonabl y Available Control Measures RACT Reasonabl y Available Control Technology*** E.O. 12866 Review

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Page 187 of 223 RFA Regulatory Flexibility

Act RFG Reformulated Gasoline RFP Reasonable Further Progress ROP Rate
- of

- Progress RPO Regional Planning Organization SBA Small Business Administration SIP State Implementation Plan TAR Tribal Authority Rule TAS Treatment in the Same Manner as a State (“Treatment as State”) TIP Tribal Implementation Plan; also Transportation Improvement Program

(depending on context) tpd Tons Per Day tpy Tons Per Year TSP Total Suspended Particulate UMRA Un funded Mandates Reform Act of 1995 VCS Voluntary Consensus Standards VOC Volatile Organic Compound*** E.O. 12866 Review

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Page 188 of 223 **APPENDIX B**  **TO FINAL**  **- LIST OF AREAS NONATTAINMENT FOR THE 2008**  **OZONE NAAQS IN ADDITION TO A PRIOR OZONE NAAQS** Table 1: Areas nonattainment for both the 2008 and 1997 ozone NAAQS

**2008 Nonattainment Area Name 2008**  **8 -**  **hour Ozone**  **Classification 1997**  **8 -**  **hour**

**Ozone Classification**  **1997 Ozone Attainment**

**Determination** Calaveras Count y, CA* Marginal Moderate Attainment Deadline Determination Clean Data Determination Chico Area, CA Marginal Marginal Attainment Deadline Determination Clean Data Determination Denver
- Boulder
- Greeley
- Ft. Collins
- Lo veland Area, CO Marginal Marginal Imperial County

Area, CA Marginal Moderate Clean Data Determination Jamestown Area, NY Marginal Moderate Clean Data Determination ** Kern County

(Eastern Kern) Area, CA Marginal Moderate Attainment Deadline Determination Clean Data Determination Mariposa County , CA * Marginal Moderate Attainment Deadline Determination Clean Data Determination Nevada Count y (Western part) Area, CA Marginal Moderate Attainment Deadline Determination Clean Data Determination Pittsburgh
- Beaver Valley Area, PA Marginal Moderate Clean Data Determination ** Sheboygan Count y, W I Marginal Moderate Clean Data Determination St. Louis
- St. Charles
- Farmington, MO
- IL * Marginal Moderate Attainment Deadline Determination *** Clean Data Determination*** E.O. 12866 Review

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Page 189 of 223 * 2008 nonattainment area boundary differs from 1997 nonattainment area boundary
. ** The EPA published a proposed approval action for the state submitted redesignation request under CAA section 107(d)(3)(E) for the 1997 ozone NAAQS.

** Former subpart 1 areas with Determinations of Attainment prior to subpart 2 classification on May

14, 2012 (77 FR 28424). The EPA is considering approving an Attainment Deadline Determination for the Marginal or Moderate 1997 ozone NAAQS attainment date.

*** The EPA published a final approval action for the redesignation request submitted by

the state of IL under CAA section 107(d)(3)(E) for the 1997 ozone NAAQS. The state of MO submitted a redesignation request under CAA section 107(d)(3)(E ) for the 1997 ozone NAAQS.*** E.O. 12866 Review

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Page 190 of 223 Table 2: Areas nonattainment for the 2008, 1997, and 1
- hour ozone NAAQS

**2008 Nonattainment**  **Area Name 2008** 

**8 -**  **hour Ozone**  **Classifi**   ** cation** **1 -**  **hour**

**Ozone Classifi**  **** **cation 1**  **- hour Ozone** 

**Attainment Determination**  **1997 8 -**  **hour**

**Ozone Classifi**  **** **cation 1997 Ozone** 

**Attainment Determination**  Baltimore Area, MD Moderate Severe 15 Clean Data Determination Serious Dallas
- Fort Worth Area, TX * Moderate Serious Clean Data Determination Serious Dukes County , MA * Marginal Serious Clean Data Determination, Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination Greater Connecticut Area, CT Marginal Serious Clean Data Determination Moderate Clean Data Determination, Attainment Deadline Determination Houston
Galveston
Brazoria Area, TX Marginal Severe 17 Severe 15 Los Angeles and San Bernardino Counties (W Mojave Desert) Area, CA Severe 15 Severe 17 Severe 15
Los Angeles
South Coast Air Basin Area, CA Extreme Extreme Extreme Morongo Areas of Indian Country (Morongo Band of Mission Indians) ** Serious Severe
17 Severe 17

New York
- N. New Jersey
- Long Island Area, NY, NJ, CT Marginal Severe 17 Clean Data Determination Moderate Clean Data Determination, Attainment Deadline Determination*** E.O. 12866 Review

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Page 191 of 223 * 2008 nonattainment area boundary differs from 1997 and 1
- hr ozone nonattainment area boundary
. Pechanga Areas of Indian Country (Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation) ** * Moderate Extreme Severe 17

Philadelphia
Wilmington
Atlantic City Area, PA, NJ, MD, DE * Marginal Severe 15 Clean Data Determination, Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination Riverside County (Coachella Valley) Area (1
- hr Southeast Desert), CA Severe 15 Severe 17 Severe 15

Sacramento Metro Area, CA Severe 15 Severe 15 Clean Data Determination Severe 15 San Francisco Ba y Area, CA Marginal Other Clean Data Determination, Attainment Deadline Determination Marginal
San Joaquin Valley Area, CA Extreme Extreme Extreme Seaford, DE *** * Marginal Marginal Clean Data Determination, Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination Ventura Count y (part) Area, CA Serious Severe 15 Clean Data Determination, Attainment Deadline Determination Serious Clean Data Determination Washington Area, DC, MD, VA Marginal Severe 15 Clean Data Determination, Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination*** E.O. 12866 Review

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Page 192 of 223 ** Part of Los Angeles
- South Coast Air Basin Area, CA (South Coast) for 1997 and 1
- hr ozone nonattainment area boundaries. The EPA published a correction of the classification for the 1997 ozone and 1
- hr ozone NAAQS on September 23, 2013 (78 FR 58189).
** * Part of Los Angeles
- South Coast Air Basin Area, CA (South Coast) for 1997 and 1
- hr ozone nonattainment area boundaries. The EPA published a correction o f the classification for the 1997 ozone NAAQS on May 5, 2010 (75 FR 24409).
*** * Part of the Philadelphia
- Wilmington
- Atlantic City Area, PA, NJ, MD, DE for 1997 ozone nonattainment area boundary , and part of the Sussex County , DE ozone nonattainment area boundary for the 1
- hour ozone NAAQS.*** E.O. 12866 Review

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Page 193 of 223 **Statutory Authority** The statutory

authorit y for this action is provided by sections 109; 110; 172; 181 through 185B; 301(a)(1) and 501(2)(B) of the CAA, as amended (42 U.S.C. 7409; 42 U.S.C. 7410; 42 U.S.C. 7502 ; 42 U.S.C. 7511
- 7511f; 42 U.S.C. 7601(a)(1); 42 U.S.C. 7661(2)(B)). **List of Subjects** 40 CFR Part 50 Environmental protection, Air pollution control, Carbon monoxide, Lead, Nitrogen dioxide, Ozone, Particulate matter, Sulfur oxides. 40 CFR Part 51 Air pollution control, Intergovernmental relations, Ozone, Particulate matter, Transportation, Volatile organic compounds. 40 CFR Part 52 Air pollution control, Intergovernmental relations, Ozone, Particulate matter. 40 CFR Part 70 Environmental protection, Air pollution control, Intergovernmental relations, Nitrogen oxides, Operating permits, Ozone, Particulate matter, Reporting and record keeping requirements, Volatile organic compounds.*** E.O. 12866 Review

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Page 194 of 223 **Page 18**  **8 of 2**  **1 7**  **- Implementation of the 2008 National Ambient Air Quality**  **Standards for Ozone: State Implementation Plan Requirements** 40 CFR Part 71 Environmental protection, Administrative practice and procedure, Air pollution control, Intergovernmental relations, Nitr ogen oxides, Operating permits, Ozone, Particulate matter, Reporting and record keeping requirements, Volatile organic compounds.

__________________________________ Dated:

__________________________________ Gina McCarth y , Administrator.*** E.O. 12866 Review

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Page 195 of 223 For the reasons stated in the preamble, Title 40, Chapter I of the Code of Federal Regulations is amended as follows: **PART 50**

**– NA** **TIONA L PRIMA**  **RY AN**  **D SECONDA RY**  **AMBIENT AI**  **R QUA LITY**  **STA NDA**  **RDS** 1. The authorit y citation for part 50 continues to read as follows: **Authority:** 42 U.S.C. 7401, et seq . 2. In §50.10, revise paragraph (c) to read as follows: **§50.10 National 8 -**  **hour primary and secondary ambient air quality standards for**
**ozone.** * * * * * (c) Until the effective date of the final Impleme ntation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements Rule to be codified at 40 CFR 51.1100 et seq., the 1997 ozone NAAQS set forth in this section will continue in effect, notwithstanding the promulgation of the 2008 ozone NAAQS under §50.15. The 1997 ozone NAAQS set forth in this section will no longer apply upon the effective date of the final SIP Requirements Rule. For purposes of the anti
- backsliding requirements of 40 CFR 51.1105 and 51.1114, the area designations and classifications with respect to the revoked 1997 ozone NAAQS are codified in 40 CFR part 81.

**PART 51**

**– REQUIREMENTS FOR PREPA**  **RA TION, A**  **DOPTION, A ND**  **SUBMITTA L OF IMPLEMENTA** **TION PLA NS**  3. The authorit y citation for part 51 continues to re ad as follows: **Authority:** 23 U.S.C. 101; 42 U.S.C. 7401
- 7671q.*** E.O. 12866 Review

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Page 196 of 223 **Subpart X -**  **Provisions for Implementation of 8 -**  **Hour Ozone National Ambient Air Quality Standards**  4. Add §51.919 to read as follows: **§51.919 Applicability.** As of the effective date of the SIP Requirements Rule codified at 40 CFR 51.1100 et seq. for the 2008 ozone NAAQS, the provisions of Subpart AA shall replace the provisions of Subpart X, 51.900 to 51.918, which will cease to apply , with the exception of 51.907 for the anti
- backsliding purpos es of 51.1105(d)(2).
**Subpart AA**

**— Provisions for Implementation of the 2008 Ozone National Amb**  **ient Air Quality Standards**  5. In §51.1100, add paragraphs (o) through (cc) to read as follows:
**§51.1100 Definitions.** * * * * * (o) Applicable requirements for an area means the following requirements, to the extent such requirements appl y to the area pursuant to its classification under CAA section 181(a)(1) for the 1
- hour NAAQS or the 1997 ozone NAAQS at the time of revocation of the 1997 ozone NAAQS: (1) Reasonabl y available control technology (RACT). (2) Vehicle inspection and maintenance programs (I/M) under CAA section 182(b)(4) and 182(c)(3). (3) Major source applicability cut offs for purposes of RACT.*** E.O. 12866 Review

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Page 197 of 223 (4) Reductions to achieve Reasonable Further Pro gress (RFP). (5) Clean fuels fleet program under CAA section 183(c)(4). (6) Clean fuels for boilers under CAA section 182(e)(3). (7) Transportation Control Measures (TCMs) during heav y traffic hours as specified under CAA section 182(e)(4). (8) Enhanced (ambient) monitoring under CAA section 182(c)(1). (9) Transportation controls under CAA section 182(c)(5). (10) Vehicle miles traveled provisions of CAA section 182(d)(1). (11) NO x requirements under CAA section 182(f). (12) Attainment demonstration. (13) N onattainment contingency measures required under CAA sections 172(c)(9) and 182(c)(9) for failure to attain the 1
- hour or 1997 ozone NAAQS by the applicable attainment date or to make reasonable further progress toward attainment of the 1
- hour or 1997 ozon e NAAQS. (14) Nonattainment NSR major source thresholds and offset ratios. (15) Penalt y fee program requirements for Severe and Extreme Areas under CAA section 185. (16) Contingency

measures associated with areas utilizing CAA section 182(e)(5). (17) Reas onabl y available control measures (RACM) requirements under CAA section 172(c)(1). (p) CSAPR means the Cross State Air Pollution Rule (q) CAIR means the Clean Air Interstate Rule codified at 40 CFR 51.123(a) through (ee). (r) NO

x SIP Call means the rules codified at 40 CFR 51.121 and 51.122.*** E.O. 12866 Review

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Page 198 of 223 (s) Ozone transport region (OTR) means the area established by CAA section 184(a) or any other area established by the Administrator pursuant to CAA section 176A for purposes of ozone. (t ) Reasonable further progress (RFP) means both the emissions reductions required under CAA section 172(c)(2) which EPA interprets to be an average 3 percent per ye ar emissions reductions of either VOC or NO x and CAA sections 182(c)(2)(B) and (c)(2)(C) as well as the overarching prog ram of both the 15 percent reductions over the first six ye ars of the plan and the following three percent per y ear average. (u) Rate
- of

- progress (ROP) means the 15 percent progress reductions in VOC emissions over the first 6 ye ars required under CAA sec tion 182(b)(1). (v) Revocation of the 1

- hour NAAQS means the time at which the 1
- hour NAAQS no longer appl y to an area pursuant to 40 CFR 50.9(b). (w) Revocation of the 1997 ozone NAAQS means the time at which the 1997 8
- hour NAAQS no longer appl y to an area pursuant to 40 CFR 50.10(c). (x) Subpart 1 means subpart 1 of part D of title I of the CAA. (y) Subpart 2 means subpart 2 of part D of title I of the CAA. (z) I/M refers to the inspection and maintenance programs for in
- use vehicles required under the 1990 Clean Air Act and defined b y subpart S of 40 CFR part 51. (aa) An area “Designated nonattainment for the 1

- hour ozone NAAQS ” means, for purposes of section 51.11 05, an area that is subject to applicable 1
- hour ozone NAAQS anti
- backsliding requirements at the time of revocation of the 1997 ozone NAAQS.*** E.O. 12866 Review

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Page 199 of 223 (bb) Base year inventory for the nonattainment area means a comprehensive, accurate, current inventory

of actual emissions from sources of VOC and NO x emitted within the boundaries of the nonattainment area as required by CAA section 182(a)(1). (cc) Ozone season day emissions means an average day ’s emissions for a ty pical ozone season work weekday . The state shall select, subject to EPA approval, the particular month(s) in the ozone season and the day (s) in the work week to be represented, considering the conditions assumed in the development of RFP plans and/or emissions budgets for transportation conformity
. 6. Add §§51.1104 through 51.1119 to read as follows:
**§51.1104 [Reserved]**
**§51.1105 Transition from the 1997 ozone NAAQS to the 2008 ozone NAAQS and anti**  **- backsliding.**  (a) Requirements that continue to apply after revocation of the 1997 ozone NAAQS. (1) 2008 ozone NAAQS nonattainment and 1997 ozone NAAQS nonattainment. The following requirements apply to an area designated nonattainment for the 2008 ozone NAAQS and also de signated nonattainment for the 1997 ozone NAAQS, or nonattainment for both the 1997 and 1
- hour ozone NAAQS, at the time of revocation of the 1997 ozone NAAQS: the area remains subject to the obligation to adopt and implement the applicable requirements def ined in §51.1100(o), for any NAAQS for which it was designated nonattainment at the time of revocation, in accordance with its*** E.O. 12866 Review

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Page 200 of 223 classification for that NAAQS at the time of that revocation, except as provided in paragraph (b) of this section. (2) 2008 ozon e NAAQS nonattainment and 1997 ozone NAAQS maintenance. For an area designated nonattainment for the 2008 ozone NAAQS that was redesignated to attainment for the 1997 ozone NAAQS prior to **[INSERT DATE 30 DAYS FROM**  **DATE PU**  **BLICATION IN THE FEDERAL REGISTER]** (hereinafter a “maintenance area”) the approved SIP, including the maintenance plan, can be considered to satisfy the applicable requirements defined in section 51.1100(o) for the revoked NAAQS. The measures in the approved SIP and maintenance plan shall continue to be implemented in accordance with the terms in the SIP. Any measures associated with applicable requirements that were shifted to contingency measures prior to **[INSERT DATE 30**  **DAYS FROM DATE PUBLICATION IN THE FEDERAL REGISTER]**  may remain in th at form. After **[INSERT DATE 30 DAYS FROM DATE**  **PUBLICATION IN THE FEDERAL REGISTER]**  , and to the extent consistent with any SIP for the 2008 ozone NAAQS and with sections 110(l) and 193, the state may request that obligations under the applicable requirement s of section 51.1100(o) be shifted to the SIP’s list of maintenance plan contingency measures. (3) 2008 ozone NAAQS attainment and 1997 ozone NAAQS nonattainment. For an area that is designated attainment for the 2008 ozone NAAQS, and designated nonattainm ent for the 1997 ozone NAAQS or for both the 1997 and the 1
- hour ozone NAAQS as of **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE**  **FEDERAL REGISTER]** the area is no longer subject to nonattainment NSR and the state may at any time request that the nonatta inment NSR provisions applicable to the area be*** E.O. 12866 Review

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Page 201 of 223 removed from the SIP. The state may request, consistent with CAA section 110(l) and 193, that SIP measures adopted to satisfy other applicable requirements of §51.1100(o) be shifted to the SIP’s list of maint enance contingency measures. The area’s approved PSD SIP shall satisfy

the state’s obligations with respect to the area’s maintenance of the 2008 ozone NAAQS pursuant to CAA section 110(a)(1). (4) 2008 ozone NAAQS attainment and 1997 ozone NAAQS mainten ance. An area that is designated attainment of the 2008 ozone NAAQS and which has been redesignated to attainment for the 1997 ozone NAAQS with an approved section 175A maintenance plan, can be considered to satisfy the applicable requirements set forth in section 51.1100(o) through implementation of the provisions of its SIP and maintenance plan. After **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE**  **FEDERAL REGISTER]** , and to the extent consistent with sections 110(l) and 193, the state may request that o bligations under the applicable requirements of section 51.1100(o) be shifted to its list of maintenance plan contingency measures. For an area that is initially designated attainment for the 2008 ozone NAAQS and which has been redesignated to attainment for the 1997 ozone NAAQS with an approved section 175A maintenance plan and an approved PSD SI P, the area’s approved section 175A plan and PSD SIP shall initially be considered to satisfy

the state’s obligations under CAA section 110(a)(1) with respect to maintenance of the 2008 ozone NAAQS. (b) Effect of Redesignation or Redesignation Substitute. (1) A state remains subject to the anti
- backsliding obligations for a revoked NAAQS under paragraphs (a)(1) and (a)(2) of this section until either (1) EPA appr oves a redesignation to attainment for the area for the 2008 ozone NAAQS; or (2) EPA approves*** E.O. 12866 Review

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Page 202 of 223 a state’s showing for the area in a redesignation substitute procedure for a revoked NAAQS. Under this redesignation substitute procedure for a revoked NAAQS, and for this limited anti
- backsliding purpose, the state must show that the area has attained that revoked NAAQS due to permanent and enforceable emission reductions, and demonstrate that the area will maintain that NAAQS for 10 years from the date of EPA’s
a pproval of this showing. (2) If EPA, after notice
- and
- comment rulemaking, approves a redesignation the state may request that provisions for nonattainment NSR be removed from the SIP, and that other anti
- backsliding obligations be shifted to contingency m easures provided that such action is consistent with CAA sections 110(l) and 193. (3) If EPA, after notice and comment rulemaking, approves a redesignation substitute for a revoked NAAQS, the state may request to remove from the SIP provisions for nonatta inment NSR for that revoked NAAQS. The state may also request to shift other anti
- backsliding obligations for the relevant revoked NAAQS to contingency measures provided that such action is consistent with CAA sections 110(l) and 193. (c) Portions of an ar ea designated nonattainment or attainment for the 2008 ozone NAAQS that remain subject to the obligations identified in paragraph (a) of this section. Only that portion of the designated nonattainment or attainment area for the 2008 ozone NAAQS that was re quired to adopt the applicable requirements in §51.1100(o) for purposes of the 1
- hour or 1997 ozone NAAQS is subject to the obligations identified in paragraph (a) of this section. 40 CFR part 81, subpart C identifies the areas designated nonattainment and associated area boundaries for the 1997 ozone NAAQS. Areas that are designated nonattainment for the 1997 ozone NAAQS at the time of designation for the*** E.O. 12866 Review

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Page 203 of 223 2008 ozone NAAQS may be redesignated to attainment prior to the effective date of revocation of that o zone NAAQS. (d) Obligations under the 1997 ozone NAAQS that no longer appl y after revocation of the 1997 ozone NAAQS. (1) Second 10
- ye ar Maintenance plans. As of **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE FEDERAL REGISTER]**  , an area with an approved 1997 ozone NAAQS maintenance plan under CAA section 175A is not required to submit a second 10
- ye ar maintenance plan for the 1997 ozone NAAQS 8 y ears after approval of the initial 1997 ozone NAAQS maintenance plan. (2) Determinations of failure to attain the 1997 and/or 1
- hour NAAQS. (i) As of **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE FEDERAL**  **REGISTER]** , the EPA is no longer obligated to determine pursuant to CAA section 181(b)(2) or section 179(c) whether an area attained the 1997 ozone NAAQS by that area’s attainment date for the 1997 ozone NAAQS. (ii) As of **[INSERT DATE 30 DAYS FROM DATE**  **PUBLICATION IN THE FEDERAL REGISTER]**  , the EPA is no longer obligated to reclassify an area to a higher classification fo r the 1997 ozone NAAQS based upon a determination that the area failed to attain the 1997 ozone NAAQS b y the area’s attainment date for the 1997 ozone NAAQS. (iii) For the revoked 1
- hour and 1997 ozone NAAQS, the EPA is required to determine whether an are a attained the 1
- hour or 1997 ozone NAAQS by the area’s attainment date solely for anti
- backsliding purposes to address an applicable requirement for nonattainment contingency measures and section 185 fee programs. In making such a*** E.O. 12866 Review

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Page 2 04 of 223 determination, the EPA m ay consider and appl y the provisions of CAA section 181(a)(5) and former section 51.907 in interpreting whether a 1
- year extension of the attainment date is applicable under section 172(a)(2)(C) of the CAA. (e) Continued applicability of the FIP and SIP re quirements pertaining to interstate transport under CAA section 110(a)(2)(D)(i) and (ii) after revocation of the 1997 ozone NAAQS. All control requirements associated with a FIP or approved SIP in effect for an area as of **[INSERT DATE 30 DAYS FROM DATE**  **PUB LICATION IN THE FEDERAL**  **REGISTER]** , such as the NO x SIP Call, the CAIR, or the CSAPR shall continue to apply after revocation of the 1997 ozone NAAQS. Control requirements approved into the SI P pursuant to obligations arising from section 110(a)(2)(D)(i) an d (ii), including 40 CFR §§51.121, 51.122, 51.123, and 51.124, may be modified by

the state onl y if the requirements of §§51.121, 51.122, 51.123, and 51.124, including statewide NO x emission budgets continue to be in effect. An y such modification must meet the requirements of CAA section 110(l). (f) New source review. An area designated nonattainment for the 2008 ozone NAAQS and designated nonattainment for the 1997 ozone NAAQS on **[INSERT DATE 30 DAYS**  **FROM DATE PUBLICATION IN THE FEDERAL REGISTER]**  remains subject to the obligation to adopt and implement the major source threshold and offset requirements for nonattainment NSR that apply or applied to the area pursuant to CAA sections 172(c)(5), 173 and 182 based on the highest of: (i) the area’s classificati on under CAA section 181(a)(1) for the 1
- hour NAAQS as of the effective date of revocation of the 1
- hour ozone NAAQS; (ii) the area’s classification under 40 CFR §51.903 for the 1997 ozone NAAQS as of the date a permit is issued or as of **[INSERT DATE 30 DA**  **YS FROM***** E.O. 12866 Review

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Page 205 of 223 **DATE PU**  **BLICATION IN THE FEDERAL REGISTER]** , whichever is earlier; and (iii) the area’s classification under 40 CFR 51.1103 for the 2008 ozone NAAQS. Upon removal of nonattainment NSR obligations for a revoked NAAQS under §51.1105(b)(ii), the state r emains subject to the obligation to adopt and implement the major source threshold and offset requirements for nonattainment NSR that apply or applied to the area for the remaining applicable NAAQS consistent with this paragraph.
**§51.1106 Redesignation to nonattainment following initial designations.**  For an y area that is initially designated attainment for the 2008 ozone NAAQS and that is subsequently

redesignated to nonattainment for the 2008 ozone NAAQS, any absolute, fixed date applicable in connection with the requirements of this part other than an attainment date is extended by a period of time equal to the length of time between the effective date of the initial designation for the 2008 ozone NAAQS and the effective date of redesignation, except as o therwise provided in this subpart. The maximum attainment date for a redesignated area would be based on the area’s classification, consistent with Table 1 in §51.1103.
**§51.1107 Determining eligibility for 1 -**  **year attainment date extensions for the 2008**
**o zone NAAQS under CAA section 181(a)(5).**  (a) A nonattainment area will meet the requirement of CAA section 181(a)(5)(B) pertaining to 1
- year extensions of the attainment date if: (1) For the first 1
- ye ar extension, the area's 4th highest daily maximum 8 hour average in the attainment y ear is 0.075 ppm or less.*** E.O. 12866 Review

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Page 206 of 223 (2) For the second 1
- ye ar extension, the area's 4th highest dail y maximum 8 hour value, averaged over both the original attainment ye ar and the first extension y ear, is 0.075 ppm or less. (b) For purp oses of paragraph (a) of this section, the area’s 4th highest daily maximum 8 hour average for a ye ar shall be from the monitor with the highest 4th highest daily maximum 8 hour average for that ye ar of all the monitors that represent that area.
**§51.1108 Modeling and attainment demonstration requirements.**  (a) An area classified as Moderate under §51.1103(a) shall be subject to the attainment demonstration requirement applicable for that classification under CAA section 182(b), and such demonstration will be submitted no later than 36 months after the effective date of the area's designation for the 2008 ozone NAAQS. (b) An area classified as Serious or higher under §51.1103(a) shall be subject to the attainment demonstration requirement applicable for that classification under CAA section 182(c), and such demonstration shall be submitted no later than 48 months after the effective date of the area's designation for the 2008 ozone NAAQS. (c) Attainment demonstration criteria. An attainment demonstration due pursuant to paragraph (a) or (b) of this section must meet the requirements of §51.112; the adequacy of an attainment demonstration shall be demonstrated by means of a photochemical grid model or an y other anal ytical method determined by the Administrator , in the Administrator's discretion, to be at least as effective.*** E.O. 12866 Review

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Page 207 of 223 (d) Implementation of control measures. For each nonattainment area, the state must provide for implementation of all control measures needed for attainment no later than the beginning of th e attainment y ear ozone season. **§51.1109 [Reserved]**
**§51.1110 Requirements for reasonable further progress (RFP).** (a) RFP for nonattainment areas classified pursuant to §51.1103. The RFP requirements specified in CAA section 182 for that area’s classification shall appl y. (1) Submission deadline. For each area classified as Moderate or higher pursuant to §51.1103, the state shall submit a SIP revision no later than 36 months after the effective date of designation as nonattainment for the 2008 ozone NAAQS that provides for RFP as described in paragraphs (a)(2)
- (4) of this section. (2) RFP requirements for areas with an approved 1
- hour or 1997 ozone NAAQS 15 percent VOC ROP plan. An area classified as Moderate or higher that has the same boundaries as an area, or is entirely composed of several areas or portions of areas, for which EPA fully

approved a 15 percent plan for the 1
- hour or 1997 ozone NAAQS is considered to have met the requirements of CAA section 182(b)(1) for the 2008 ozone NAAQS and instead: (i) If classified as Moderate or higher, the area is subject to the RFP requirements under CAA section 172(c)(2) and shall submit a SIP revision that: (A) Provides for a 15 percent emission reduction from the baseline ye ar within 6 y ears after the baseline y ear;*** E.O. 12866 Review

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Page 208 of 223 (B) Provides for an additional emissions reduction of 3 percent per ye ar from the end of the first 6 y ears up to the beginning of the attainment y ear if a baseline ye ar earlier than 2011 is used; and (C) Relies on either NO x or VOC emissions reductions (or a combination) to meet the requirements of (a)(2)(i)(A) and (B). Use of NO x emissions reductions must meet the criteria in CAA section 182(c)(2)(C). (ii) If classified as Serious or higher, the area is also subject to RFP under CAA section 182(c)(2)(B) and shall submit a SIP revision no later than 48 months after the effective date of designation providing for an average emissions reduction of 3 percent per y ear: (A) For all remaining 3
- year periods after the first 6
- ye ar period until the y e ar of the area's attainment date; and (B) That relies on either NO x or VOC emissions reductions (or a combination) to meet the requirements of (a)(2)(ii)(A) and (B). Use of NO x emissions reductions must meet the criteria in CAA section 182(c)(2)(C). (3) RFP requirements for areas for which an approved 15 percent VOC ROP plan for the 1
- hour or 1997 ozone NAAQS exists for only a portion of the area. An area that contains one or more portions for which EPA fully approved a 15 percent VOC ROP plan for the 1
- ho ur or 1997 ozone NAAQS (as well as areas for which EPA has not fully approved a 15 percent plan for either the 1
- hour or 1997 ozone NAAQS) shall meet the requirements of either paragraph (a)(3)(i) or (ii) below. (i) The state shall not distinguish between the portion of the area with a previously approved 15 percent ROP plan and the portion of the area without such a plan, and shall meet the requirements of (a)(4) of this section for the entire nonattainment area.*** E.O. 12866 Review

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Page 209 of 223 (ii) The state shall treat the area as two parts, each with a separate RFP target as follows: (A) For the portion of the area without an approved 15 percent VOC ROP plan for the 1
- hour or 1997 ozone NAAQS, the state shall submit a SIP revision as required under paragraph (a)(4) of this section. (B ) For the portion of the area with an approved 15 percent VOC ROP plan for the 1
- hour or 1997 ozone NAAQS, the state shall submit a SIP as required under paragraph (a)(2) of this section. (4) ROP Requirements for areas without an approved 1
- hour or 1997 oz one NAAQS 15 percent VOC ROP plan. (i) For each area, the state shall submit a SI P revision consistent with CAA section 182(b)(1). The 6
- ye ar period referenced in CAA section 182(b)(1) shall begin January 1 of the y ear following the y ear used for the base line emissions inventory
. (ii) For Moderate areas, the plan must provide for an additional 3 percent per year reduction from the end of the first 6 y ears up to the beginning of the attainment y ear if a baseline year from 2008 to 2010 is used. (iii) For eac h area classified as Serious or higher, the state shall submit a SIP revision consistent with CAA section 182(c)(2)(B). The final increment of progress must be achieved no later than the attainment date for the area. (5) Creditability

of emission control m easures for RFP plans. Except as specificall y provided in CAA section 182(b)(1)(C) and (D), section 182(c)(2)(B), and §51.1110(a)(6) below, all emission reductions from SI P
- approved or federall y promulgated measures that occur after the baseline emissions inventory y ear are creditable for purposes of the*** E.O. 12866 Review

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Page 210 of 223 RFP requirements in this section, provided the reductions meet the requirements for creditability , including the need to be enforceable, permanent, quantifiable, and surplus. (6) Creditability

of out
- of
- are a emissions reductions. For each area classified as Moderate or higher pursuant to §51.1103, in addition to the restrictions on the creditability of emission control measures listed in §51.1110(a)(5), creditable emission reductions for percentage reduction RFP must be obtained from sources within the nonattainment area. (7) Calculation of non
- creditable emissions reductions. The following four categories of control measures listed in CAA section 182(b)(1)(D) are no longer required to be calculated for excl usion in RFP anal ys es because the Administrator has determined that due to the passage of time the effect of these exclusions would be de minimis : (i) measures related to motor vehicle exhaust or evaporative emissions promulgated b y J anuary 1, 1990; (ii) r egulations concerning Reid vapor pressure promulgated by November 15, 1990; (iii) measures to correct previous RACT requirements; and (iv) measures required to correct previous I/M programs. (b) Baseline emissions inventory for RFP plans. For the RFP plan s required under this section, at the time of designation for the 2008 ozone NAAQS the baseline emissions inventory shall be the emissions inventory for the most recent calendar ye ar for which a complete triennial inventory is required to be submitted to E PA under the provisions of subpart A of this part. States may use an alternative baseline emissions inventory provided the state demonstrates wh y it is appropriate to use the alternative baseline year, and provided that the ye ar selected is between the y ears 2008 to 2012. All states associated with a multi
- state nonattainment area must consult and agree on a single*** E.O. 12866 Review

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Page 211 of 223 alternative baseline year. The emissions values included in the inventory required by this section shall be actual ozone season day emissions as defined b y 51.1100(cc).
**§51.1111 [Reserved]**
**§51.1112 Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM).**  (a) RACT requirement for areas classified pursuant to §51.1103. (1) For each nonatta inment area classified Moderate or higher, the state shall submit a SIP revision that meets the VOC and NO x RACT requirements in CAA sections 182(b)(2) and 182(f). (2) The state shall submit the RACT SIP for each area no later than 24 months after the eff ective date of designation for the 2008 ozone NAAQS. (3) The state shall provide for implementation of RACT as expeditiously as practicable but no later than January

1 of the 5th y ear after the effective date of designation for the 2008 ozone NAAQS. (b) Determination of major stationary sources for applicability

of RACT provisions. The amount of VOC and NO x emissions are to be considered separatel y for purposes of determining whether a source is a major stationary source as defined in CAA section 30 2. (c) Reasonabl y Available Control Measures (RACM) requirement. For each nonattainment area required to submit an attainment demonstration under §51.1108(a) and (b), the state shall submit with the attainment demonstration a SIP revision*** E.O. 12866 Review

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Page 212 of 223 demonstrating th at it has adopted all RACM necessary to demonstrate attainment as expeditiously

as practicable and to meet any RFP requirements.
**§51.1113 Section 182(f) NO x**  **exemption provisions.** (a) A person or a state may petition the Administrator for an exemption fro m NO x obligations under section 182(f) for an y area designated nonattainment for the 2008 ozone NAAQS and for any area in a section 184 ozone transport region. (b) The petition must contain adequate documentation that the criteria in section 182(f) are met . (c) A section 182(f) NO x exemption granted for the 1
- hour or 1997 ozone NAAQS does not relieve the area from any NO x obligations under section 182(f) for the 2008 ozone NAAQS.
**§51.1114 New source review requirements.** The requirements for nonattainment N SR for the ozone NAAQS are located in §51.165 of this part. For each nonattainment area, the state shall submit a nonattainment NSR plan or plan revision for the 2008 ozone NAAQS no later than 36 months after the effective date of the area's designation fo r the 2008 ozone NAAQS.
**§51.1115 Emissions inventory requirements.** (a) For each nonattainment area, the state shall submit a base y ear inventory as defined by §51.1100(bb) to meet the emissions inventory requirement of CAA section 182(a)(1). This inventory shall be submitted no later than 24 months after the effective date of*** E.O. 12866 Review

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Page 213 of 223 designation. The inventory y ear shall be selected consistent with the baseline y ear for the RFP plan as required b y §51.1110(b). (b) For each nonattainment area, the state shall subm it a periodic emission inventory of emissions sources in the area to meet the requirement in CAA section 182(a)(3)(A). With the exception of the inventory y ear and timing of submittal, this inventory shall be consistent with the requirements of (a). Each p eriodic inventory shall be submitted no later than the end of each 3
- ye ar period after the required submission of the base y ear inventory for the nonattainment area. This requirement shall apply until the area is redesignated to attainment. (c) The emissio ns values included in the inventories required b y (a) and (b) shall be actual ozone season day

emissions as defined by

§51.1100(cc). (d) The state shall report emissions from point sources according to the point source emissions thresholds of the Air Emiss ions Reporting Requirements (AERR), 40 CFR part 51, subpart A. (e) The data elements in the emissions inventory shall be consistent with the detail required b y 40 CFR part 51, subpart A. Since onl y emissions within the boundaries of the nonattainment area shall be included as defined b y §51.1100(cc), this requirement shall apply to the emissions inventories required in this section instead of an y total county requirements contained in 40 CFR part 51, subpart A.
**§51.1116 Requirements for an Ozone Transport Region.**  (a) In general. CAA sections 176A and 184 appl y for purposes of the 2008 ozone NAAQS.*** E.O. 12866 Review

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Page 214 of 223 (b) RACT requirements for certain portions of an Ozone Transport Region. (1) The state shall submit a SIP revision that meets the RACT requirements of CAA sectio n 184(b)(2) for all portions of the state located in an ozone transport region. (2) The state is required to submit the RACT revision no later than 24 months after designation for the 2008 ozone NAAQS and shall provide for implementation of RACT as expe ditiously

as practicable but no later than January 1 of the 5th ye ar after designation for the 2008 ozone NAAQS.
**§51.1117 Fee programs for Severe and Extreme nonattainment areas that fail to attain.**  For each area classified as Severe or Extreme for the 2 008 ozone NAAQS, the state shall submit a SIP revision within 10 y ears of the effective date of designation that meets the requirements of CAA section 185.
**§51.1118 Suspension of SIP planning requirements in nonattainment areas that have air quality data**  **that meet an ozone NAAQS.** Upon a determination b y EPA that an area designated nonattainment for the 2008 ozone NAAQS, or for an y prior ozone NAAQS, has attained the relevant standard, the requirements for such area to submit attainment demonstrations and a ssociated reasonabl y available control measures, reasonable further progress plans, contingency measures for failure to attain or make reasonable progress and other planning SIPs related to attainment of the 2008 ozone NAAQS, or for any prior NAAQS for whi ch the determination has been made, shall be suspended until such time as: the area is*** E.O. 12866 Review

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Page 215 of 223 redesignated to attainment for that NAAQS or a redesignation substitute is approved as appropriate, at which time the requirements no longer appl y; or EPA determines that the area has violated that NAAQS, at which time the area is again required to submit such plans.
**§51.1119 Applicability.** As of revocation of the 1997 ozone NAAQS on **[INSERT DATE 30 DAYS FROM**  **DATE PU**  **BLICATION IN THE FEDERAL REGISTER]** , as set forth in §50.10(c), the provisions of Subpart AA shall replace the provisions of subpart X, §§51.900 to 51.918, which cease to appl y except for §51.907 for the anti
- backsliding purposes of §51.1105(c)(2). See Subpart X §51.919.

7. In Appendix S t o part 51: a. Revise section IV.G.5. b. Add section VII. The revision and addition read as follows: **Appendix S to Part 51**

**– Emission Offset Interpretative Ruling**  *** * * * *** G. Offset Ratios. * * * * * 5. Interpollutant offsetting . In meeting the emissions off set requirements of paragraph IV.A, Condition 3 of this Ruling, the emissions offsets obtained shall be for*** E.O. 12866 Review

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Page 216 of 223 the same regulated NSR pollutant unless interpollutant offsetting is permitted for a particular pollutant as specified in this paragraph IV.G.5. ( i) The offset requirements of paragraph IV.A, Condition 3 of this Ruling for emissions of the ozone precursors NOx and VOC may be satisfied by

offsetting reductions of emissions of either of those precursors, if all other requirements for such offsets are also satisfied. (ii) The offset requirements of paragraph IV.A, Condition 3 of this Ruling for direct PM 2.5 emissions or emissions of precursors of PM 2.5 may be satisfied by

offsetting reductions of direct PM 2.5 emissions or emissions of an y PM 2.5 precurso r identified under paragraph II.A.31 (iii) of this Ruling if such offsets comply with an interprecursor trading hierarch y and ratio approved by the Administrator. * * * * * VII. ANT I
- BACKSLIDING MEASURES FOR REVOKED OZONE NAAQS Nonattainment area new sourc e review obligations for prior ozone NAAQS. (a) Except as provided in paragraph (b) of this section, an area designated nonattainment for the 2008 ozone NAAQS and designated nonattainment for the 1997 ozone NAAQS
on **[INSERT DATE 30 DAYS FROM DATE**  **PUBLICATI ON IN THE FEDERAL**  **REGISTER]** remains subject to the obligation to adopt and implement the major source threshold and offset ratio requirements for nonattainment new source review that apply or applied to the area pursuant to CAA sections 172(c)(5), 173 and 182 based on the highest of: (i) the area’s classification under CAA section 181(a)(1) for the 1
- hour ozone NAAQS as of the effective date of revocation of that NAAQS; (ii) the area’s classification under 40 CFR 51.903 for the 1997 ozone NAAQS as of the date a permit is*** E.O. 12866 Review

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Page 217 of 223 issued or as of **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE**  **FEDERAL REGISTER]** , whichever is earlier; and (iii) the area’s classification under 40 CFR 51.1103 for the 2008 ozone NAAQS. (b)(1) An area remains subject to the obligations f or a revoked NAAQS under paragraph (a) until either (1) the area is redesignated to attainment for the 2008 ozone NAAQS; or (2) EPA approves a state’s showing for the area in a redesignation substitute procedure for a revoked NAAQS per the provisions of §5 1.1105(b). Under this redesignation substitute procedure for a revoked NAAQS, and for this limited anti
- backsliding purpose, the area must show that it has attained that revoked NAAQS due to permanent and enforceable emission reductions, and it must demons trate that it will maintain that NAAQS for 10 ye ars from the date of EPA’s approval of this showing. (2) Effect of redesignation to attainment for 2008 ozone NAAQS or approval of a redesignation substitute for a revoked ozone NAAQS. After redesignation to attainment for the 2008 ozone NAAQS, the state may request that provisions for nonattainment NSR be removed from the SIP. After EPA approval of a redesignation substitute for a revoked NAAQS under the provisions of §51.1105(b), the state may request that provisions for nonattainment NSR for the revoked NAAQS be removed from the SIP. Upon removal of nonattainment new source review obligations for a revoked NAAQS, the state remains subject to the obligation to adopt and implement the major source threshold and offset ratio requirements for nonattainment new source review that appl y or applied to the area for the remaining applicable NAAQS consistent with paragraph (a).

8. In §51.165:*** E.O. 12866 Review

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Page 218 of 223 a. Revise paragraph (a)(11). b. Add paragraph (a)(12). The revision and addition read as follows: **§51.165 Permit requirements.** (a) * * * (11) The plan shall require that in meeting the emissions offset requirements of paragraph (a)(3) of this section, the emissions offsets obtained shall be for the same regulated NSR pollutant unless interprecursor offsetting is permitted for a particular pollutant as specified in this paragraph. (i) The plan may

allow the offset requirement in paragraph (a)(3) of this section for emissions of the ozone precursors NOx and VOC to be satisfied by offsetting reductions in emissions of either of those precursors, if all other requirements for such offsets are also satisfied. (ii) The plan may

allow the offset requirements in paragraph (a)(3) of this section for direct PM 2.5 emissions or emissions of precursors of PM 2.5 to be satisfied by offsetting reductions in direct PM 2.5 emissions or emissions of an y PM 2.5 precursor identified under paragraph (a)(1)(xxxvii)(C) of this section if such offsets compl y with the interprecursor trading hierarch y and ratio established in the approved plan for a particular nonattainment
area. (12) The plan shall require that in an y area designated nonattainment for the 2008 ozone NAAQS and designated nonattainment for the 1997 ozone NAAQS on **[INSERT DATE 30 DAYS FROM DATE**  **PU BLICATION IN THE FEDERAL REGISTER]**  the requirements of this section applicable to major stationary sources and major*** E.O. 12866 Review

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Page 219 of 223 modifications of ozone shall include the anti
- backsliding requirements contained at § 51.1105(f) of this chapter. * * * * * 9. In §51.166, revise paragraph (i)(2) to read as follows: **§51.166 Prevention of significant deterioration of air quality.** * * * * * (i) Exemptions. * * * (2) The plan may

provide that requirements equivalent to those contained in paragraphs (j) through (r) of this section do not apply to a major stationary

source or major modification with respect to a particular pollutant if the o wner or operator demonstrates that, as to that pollutant, the source or modification is located in an area designated as nonattainment under section 107 of the Act. Nonattainment designations for revoked NAAQS, as contained in 40 CFR part 81, shall not be viewed as current designations under section 107 of the Act for purposes of determining the applicability of requirements equivalent to those contained in paragraphs (j) through (r) of this section to a major stationary

source or major modification after the revocation of that NAAQS is effective. * * * * * 10. In § 51.372, revise paragraph (b)(2) to read as follows: **§51.372 State Implementation Plan submissions.** * * * * * (b) * * **** E.O. 12866 Review

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Page 220 of 223 (2) A SIP revision required as a result of an area being newl y designated and classified under a NAAQS for ozone, including all necessary legal authority

and the items specified in paragraphs (a)(1) through (a)(8) of this section, shall be submitted no later than the deadline for submitting the area’s attainment SIP for the NAAQS in question. * * * * * **PART 52**

**—**

**APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS**  11. The authorit y citation for part 52 continues to read as follows: **Authority:** 42 U.S.C. 7401 et seq . 12. In §52.21, revise paragraph (i)(2) to read as follows: * * * * * (i) Exemptions. * * * (2) The requirements of paragraphs (j) through (r) of this section shall not apply to a major stationary

source or major modification with respect to a particular pollutant if the owner or operator demonstrates that, as to that pollutant, the source or modification is located in an area designated as nonattainment under section 107 of the Act. Nonattainment designations for revoked NAAQS, as contained in 40 CFR part 81, shall not be viewed as current designations under section 107 of the Act for purposes of determining the applicability of paragraphs (j) through (r) of this section to a major statio nary source or major modification after the revocation of that NAAQS is effective. * * * * **** E.O. 12866 Review

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Page 221 of 223 **PART 70**

**— STATE OPERATING PERMIT PROGRAMS**  13. The authorit y citation for part 70 continues to read as follows: **Authority:** 42 U.S.C. 7401, et seq . 14. In § 70.2, und er the definition entitled “ Major source ,” revise paragraphs (3)(i), (3)(iii)(A), and (3)(iv) to read as follows: **§ 70.2 Definitions.** * * * * * (3) * * * (i) For ozone nonattainment areas, sources with the potential to emit 100 tpy or more of volatile organic compounds or oxides of nitrogen in areas classified or treated as classified as “Marginal” or “Moderate,” 50 tp y or more in areas classified or treated as classified as “Serious,” 25 tpy or more in areas classified or treated as classi fied as “Severe,” and 10 tp y or more in areas classified or treated as classified as “Extreme”; except that the references in this paragraph to 100, 50, 25 and 10 tpy of nitrogen oxides shall not apply

with respect to an y source for which the Administrator has made a finding, under section 182(f) (1) or (2) of the Act, that requirements under section 182(f) of the Act do not appl y; * * * * * (iii) * * * (A) That are classified or treated as classified as “Serious,” and * * * * * (iv) For particulate matter (PM
- 10) nonattainment areas classified or treated as classified as “Serious,” sources with the potential to emit 70 tpy or more of PM
- 10.*** E.O. 12866 Review

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Page 222 of 223 * * * * * **PART 71**

**— FEDERAL OPERATING PERMIT PROGRAMS**  15. The authorit y citation for part 71 continues to read as follows: **Authority:** 42 U.S.C. 7401, et seq . 16. In § 71.2, under the definition entitled “ Major source ,” revise paragraphs (3)(i), (3)(iii)(A), and (3)(iv) to read as follows: **§ 71.2 Definitions.** * * * * * (3) * * * (i) For ozone nonattainment areas , sources with the potential to emit 100 tpy or more of volatile organic compounds or oxides of nitrogen in areas classified or treated as classified as “Marginal” or “Moderate,” 50 tp y or more in areas classified or treated as classified as “Serious,” 25 tpy or more in areas classified or treated as classified as “Severe,” and 10 tp y or more in areas classified or treated as classified as “Extreme”; except that the references in this paragraph to 100, 50, 25 and 10 tpy of nitrogen oxides shall not apply

wi th respect to an y source for which the Administrator has made a finding, under section 182(f) (1) or (2) of the Act, that requirements under section 182(f) of the Act do not appl y; * * * * * (iii) * * * (A) That are classified or treated as classified as “Serious,” and * * * * **** E.O. 12866 Review

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Page 223 of 223 (iv) For particulate matter (PM
- 10) nonattainment areas classified or treated as classified as “Serious,” sources with the potential to emit 70 tpy or more of PM
- 10. * * * * *