[Federal Register Volume 79, Number 85 (Friday, May 2, 2014)]
[Proposed Rules]
[Pages 25054-25059]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2014-10105]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R03-OAR-2014-0177; FRL-9910-23-Region 3]


Approval and Promulgation of Air Quality Implementation Plans; 
Maryland; Section 110(a)(2) Infrastructure Requirements for the 2008 
Ozone National Ambient Air Quality Standards

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve a State Implementation Plan (SIP) revision submitted by the 
State of Maryland pursuant to the Clean Air Act (CAA). Whenever new or 
revised National Ambient Air Quality Standards (NAAQS) are promulgated, 
the CAA requires states to submit a plan for the implementation, 
maintenance, and enforcement of such NAAQS. The plan is required to 
address basic program elements, including, but not limited to 
regulatory structure, monitoring, modeling, legal authority, and 
adequate resources necessary to assure attainment and maintenance of 
the standards. These elements are referred to as infrastructure 
requirements. The State of Maryland has made a submittal addressing the 
infrastructure requirements for the 2008 8-hour ozone NAAQS.

DATES: Written comments must be received on or before June 2, 2014.

ADDRESSES: Submit your comments, identified by Docket ID Number EPA-
R03-OAR-2014-0177 by one of the following methods:
    A. www.regulations.gov. Follow the on-line instructions for 
submitting comments.
    B. Email: [email protected].
    C. Mail: EPA-R03-OAR-2014-0177, Cristina Fernandez, Associate 
Director, Office of Air Program Planning, Air Protection Division, 
Mailcode 3AP30, U.S. Environmental Protection Agency,

[[Page 25055]]

Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103.
    D. Hand Delivery: At the previously-listed EPA Region III address. 
Such deliveries are only accepted during the Docket's normal hours of 
operation, and special arrangements should be made for deliveries of 
boxed information.
    Instructions: Direct your comments to Docket ID No. EPA-R03-OAR-
2014-0177. EPA's policy is that all comments received will be included 
in the public docket without change, and may be made available online 
at www.regulations.gov, including any personal information provided, 
unless the comment includes information claimed to be Confidential 
Business Information (CBI) or other information whose disclosure is 
restricted by statute. Do not submit information that you consider to 
be CBI or otherwise protected through www.regulations.gov or email. The 
www.regulations.gov Web site is an ``anonymous access'' system, which 
means EPA will not know your identity or contact information unless you 
provide it in the body of your comment. If you send an email comment 
directly to EPA without going through www.regulations.gov, your email 
address will be automatically captured and included as part of the 
comment that is placed in the public docket and made available on the 
Internet. If you submit an electronic comment, EPA recommends that you 
include your name and other contact information in the body of your 
comment and with any disk or CD-ROM you submit. If EPA cannot read your 
comment due to technical difficulties and cannot contact you for 
clarification, EPA may not be able to consider your comment. Electronic 
files should avoid the use of special characters, any form of 
encryption, and be free of any defects or viruses.
    Docket: All documents in the electronic docket are listed in the 
www.regulations.gov index. Although listed in the index, some 
information is not publicly available, i.e., CBI or other information 
whose disclosure is restricted by statute. Certain other material, such 
as copyrighted material, is not placed on the Internet and will be 
publicly available only in hard copy form. Publicly available docket 
materials are available either electronically in www.regulations.gov or 
in hard copy during normal business hours at the Air Protection 
Division, U.S. Environmental Protection Agency, Region III, 1650 Arch 
Street, Philadelphia, Pennsylvania 19103. Copies of the State submittal 
are available at the Maryland Department of the Environment, 1800 
Washington Boulevard, Suite 705, Baltimore, Maryland 21230.

FOR FURTHER INFORMATION CONTACT: Ruth Knapp, (215) 814-2191, or by 
email at [email protected].

SUPPLEMENTARY INFORMATION: On December 27, 2012, the Maryland 
Department of the Environment (MDE) submitted a revision to its SIP to 
satisfy the requirements of section 110(a)(2) of the CAA for the 2008 
ozone NAAQS.

I. Background

    On March 27, 2008, EPA promulgated a revised NAAQS for ozone based 
on 8-hour average concentrations. EPA revised the level of the 8-hour 
ozone NAAQS to 0.075 parts per million (ppm). Pursuant to section 
110(a)(1) of the CAA, states are required to submit SIPs meeting the 
applicable requirements of section 110(a)(2) within three years after 
promulgation of a new or revised NAAQS or within such shorter period as 
EPA may prescribe. Section 110(a)(2) requires states to address basic 
SIP elements such as requirements for monitoring, basic program 
requirements and legal authority that are designed to assure attainment 
and maintenance of the NAAQS. Section 110(a) imposes the obligation 
upon states to make a SIP submission to EPA for a new or revised NAAQS, 
but the contents of that submission may vary depending upon the facts 
and circumstances. In particular, the data and analytical tools 
available at the time the state develops and submits the SIP for a new 
or revised NAAQS affects the content of the submission. The content of 
such SIP submissions may also vary depending upon what provisions the 
state's existing SIP already contains.
    In the case of the 2008 8-hour ozone NAAQS, states typically have 
met the basic program elements required in section 110(a)(2) through 
earlier SIP submissions in connection with the 1997 8-hour ozone NAAQS. 
More specifically, section 110(a)(1) provides the procedural and timing 
requirements for SIPs. Section 110(a)(2) lists specific elements that 
states must meet for ``infrastructure'' SIP requirements related to a 
newly established or revised NAAQS. As mentioned earlier, these 
requirements include basic SIP elements such as requirements for 
monitoring, basic program requirements and legal authority that are 
designed to assure attainment and maintenance of the NAAQS.

II. Summary of SIP Revision

    On December 27, 2012, MDE provided a SIP revision to satisfy the 
requirements of section 110(a)(2) of the CAA for the 2008 ozone NAAQS. 
Their submittal addressed the following infrastructure elements: 
Section 110(a)(2)(A), (B), (C), (D), (E), (F), (G), (H), (J), (K), (L), 
and (M). EPA has analyzed the identified submission and is proposing to 
make a determination that such submittal meets the requirements of 
section 110(a)(2)(A), (B), (C), D(i)(II), D(ii), (E), (F), (G), (H), 
(J), (K), (L), and (M) of the CAA, with the exception of the Part D, 
Title I nonattainment planning requirements of section 110(a)(2)(I), 
and the portion of the submittal relating to section 110(a)(2)(D)(i)(I) 
on which EPA will take separate action. A detailed summary of EPA's 
review and rationale for approving Maryland's submittal may be found in 
the Technical Support Document (TSD) for this proposed rulemaking 
action which is available online at www.regulations.gov, Docket number 
EPA-R03-OAR-2014-0177. This rulemaking action does not include any 
proposed action on section 110(a)(2)(I) of the CAA which pertains to 
the nonattainment requirements of part D, Title I of the CAA, because 
this element is not required to be submitted by the 3-year submission 
deadline of CAA section 110(a)(1), and will be addressed in a separate 
process. This proposed rulemaking action also does not address section 
110(a)(2)(D)(i)(I) of the CAA. In accordance with the decision of the 
U.S. Court of Appeals for the District of Columbia (D.C. Circuit 
Court), EPA at this time is not treating the 110(a)(2)(D)(i)(I) SIP 
submission from Maryland as a required SIP submission. See EME Homer 
City Generation, L. P. v. EPA, 696 F .3d 7 (D.C. Cir. 2013), cert. 
granted, 133 U.S. 2857 (2013). On June 24, 2013, the Supreme Court 
granted the petitions of the United States and others and agreed to 
review this D.C. Circuit Court decision. However, at this time the D.C. 
Circuit Court decision remains in place and unless it is reversed or 
otherwise modified by the Supreme Court, states are not required to 
submit 110(a)(2)(D)(i)(I) SIPs until EPA has quantified their 
obligations under that section. EPA will address the portion of 
Maryland's December 27, 2012 submittal addressing section 
110(a)(2)(D)(i)(I) in a separate action.

III. EPA's Approach to Review Infrastructure SIPs

    EPA is acting upon the SIP submission from MDE that addresses the 
infrastructure requirements of section 110(a)(1) and (2) of the CAA for 
the 2008 ozone NAAQS. The requirement for states to make a SIP

[[Page 25056]]

submission of this type arises out of section 110(a)(1). Pursuant to 
section 110(a)(1), states must make SIP submissions ``within 3 years 
(or such shorter period as the Administrator may prescribe) after the 
promulgation of a national primary ambient air quality standard (or any 
revision thereof),'' and these SIP submissions are to provide for the 
``implementation, maintenance, and enforcement'' of such NAAQS. The 
statute directly imposes on states the duty to make these SIP 
submissions, and the requirement to make the submissions is not 
conditioned upon EPA's taking any action other than promulgating a new 
or revised NAAQS. Section 110(a)(2) includes a list of specific 
elements that ``[e]ach such plan'' submission must address.
    EPA has historically referred to these SIP submissions made for the 
purpose of satisfying the requirements of section 110(a)(1) and (2) as 
``infrastructure SIP'' submissions. Although the term ``infrastructure 
SIP'' does not appear in the CAA, EPA uses the term to distinguish this 
particular type of SIP submission from submissions that are intended to 
satisfy other SIP requirements under the CAA, such as ``nonattainment 
SIP'' or ``attainment plan SIP'' submissions to address the 
nonattainment planning requirements of part D of title I of the CAA, 
``regional haze SIP'' submissions required by EPA rule to address the 
visibility protection requirements of CAA section 169A, and 
nonattainment new source review permit program submissions to address 
the permit requirements of CAA, title I, part D.
    Section 110(a)(1) addresses the timing and general requirements for 
infrastructure SIP submissions and section 110(a)(2) provides more 
details concerning the required contents of these submissions. The list 
of required elements provided in section 110(a)(2) contains a wide 
variety of disparate provisions, some of which pertain to required 
legal authority, some of which pertain to required substantive program 
provisions, and some of which pertain to requirements for both 
authority and substantive program provisions.\1\ EPA therefore believes 
that while the timing requirement in section 110(a)(1) is unambiguous, 
some of the other statutory provisions are ambiguous. In particular, 
EPA believes that the list of required elements for infrastructure SIP 
submissions provided in section 110(a)(2) contains ambiguities 
concerning what is required for inclusion in an infrastructure SIP 
submission.
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    \1\ For example: Section 110(a)(2)(E)(i) provides that states 
must provide assurances that they have adequate legal authority 
under state and local law to carry out the SIP; section 110(a)(2)(C) 
provides that states must have a SIP-approved program to address 
certain sources as required by part C of title I of the CAA; and 
section 110(a)(2)(G) provides that states must have legal authority 
to address emergencies as well as contingency plans that are 
triggered in the event of such emergencies.
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    The following examples of ambiguities illustrate the need for EPA 
to interpret some section 110(a)(1) and section 110(a)(2) requirements 
with respect to infrastructure SIP submissions for a given new or 
revised NAAQS. One example of ambiguity is that section 110(a)(2) 
requires that ``each'' SIP submission must meet the list of 
requirements therein, while EPA has long noted that this literal 
reading of the statute is internally inconsistent and would create a 
conflict with the nonattainment provisions in part D of title I of the 
CAA, which specifically address nonattainment SIP requirements.\2\ 
Section 110(a)(2)(I) pertains to nonattainment SIP requirements and 
part D addresses when attainment plan SIP submissions to address 
nonattainment area requirements are due. For example, section 172(b) 
requires EPA to establish a schedule for submission of such plans for 
certain pollutants when the Administrator promulgates the designation 
of an area as nonattainment, and section 107(d)(1)(B) allows up to two 
years or in some cases three years, for such designations to be 
promulgated.\3\ This ambiguity illustrates that rather than apply all 
the stated requirements of section 110(a)(2) in a strict literal sense, 
EPA must determine which provisions of section 110(a)(2) are applicable 
for a particular infrastructure SIP submission.
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    \2\ See, e.g., ``Rule To Reduce Interstate Transport of Fine 
Particulate Matter and Ozone (Clean Air Interstate Rule); Revisions 
to Acid Rain Program; Revisions to the NOx SIP Call; 
Final Rule,'' 70 FR 25162, at 25163--65, May 12, 2005, (explaining 
relationship between timing requirement of section 110(a)(2)(D) 
versus section 110(a)(2)(I)).
    \3\ EPA notes that this ambiguity within section 110(a)(2) is 
heightened by the fact that various subparts of part D set specific 
dates for submission of certain types of SIP submissions in 
designated nonattainment areas for various pollutants. Note, e.g., 
that section 182(a)(1) provides specific dates for submission of 
emissions inventories for the ozone NAAQS. Some of these specific 
dates are necessarily later than three years after promulgation of 
the new or revised NAAQS.
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    Another example of ambiguity within section 110(a)(1) and (2) with 
respect to infrastructure SIPs pertains to whether states must meet all 
of the infrastructure SIP requirements in a single SIP submission, and 
whether EPA must act upon such SIP submission in a single action. 
Although section 110(a)(1) directs states to submit ``a plan'' to meet 
these requirements, EPA interprets the CAA to allow states to make 
multiple SIP submissions separately addressing infrastructure SIP 
elements for the same NAAQS. If states elect to make such multiple SIP 
submissions to meet the infrastructure SIP requirements, EPA can elect 
to act on such submissions either individually or in a larger combined 
action.\4\ Similarly, EPA interprets the CAA to allow it to take action 
on the individual parts of one larger, comprehensive infrastructure SIP 
submission for a given NAAQS without concurrent action on the entire 
submission. For example, EPA has sometimes elected to act at different 
times on various elements and sub-elements of the same infrastructure 
SIP submission.\5\
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    \4\ See, e.g., ``Approval and Promulgation of Implementation 
Plans; New Mexico; Revisions to the New Source Review (NSR) State 
Implementation Plan (SIP); Prevention of Significant Deterioration 
(PSD) and Nonattainment New Source Review (NNSR) Permitting,'' 78 FR 
4339, January 22, 2013 (EPA's final action approving the structural 
PSD elements of the New Mexico SIP submitted by the State separately 
to meet the requirements of EPA's 2008 PM2.5 NSR rule), 
and ``Approval and Promulgation of Air Quality Implementation Plans; 
New Mexico; Infrastructure and Interstate Transport Requirements for 
the 2006 PM2.5 NAAQS,'' 78 FR 4337, January 22, 2013 
(EPA's final action on the infrastructure SIP for the 2006 
PM2.5 NAAQS).
    \5\ On December 14, 2007, the State of Tennessee, through the 
Tennessee Department of Environment and Conservation, made a SIP 
revision to EPA demonstrating that the State meets the requirements 
of sections 110(a)(1) and (2). EPA proposed action for 
infrastructure SIP elements (C) and (J) on January 23, 2012 (77 FR 
3213) and took final action on March 14, 2012 (77 FR 14976). On 
April 16, 2012 (77 FR 22533) and July 23, 2012 (77 FR 42997), EPA 
took separate proposed and final actions on all other section 
110(a)(2) infrastructure SIP elements of Tennessee's December 14, 
2007 submittal.
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    Ambiguities within section 110(a)(1) and (2) may also arise with 
respect to infrastructure SIP submission requirements for different 
NAAQS. Thus, EPA notes that not every element of section 110(a)(2) 
would be relevant, or as relevant, or relevant in the same way, for 
each new or revised NAAQS. The states' attendant infrastructure SIP 
submissions for each NAAQS therefore could be different. For example, 
the monitoring requirements that a state might need to meet in its 
infrastructure SIP submission for purposes of section 110(a)(2)(B) 
could be very different for different pollutants, for example because 
the content and scope of a state's infrastructure SIP submission to 
meet this element might be very different for an entirely new NAAQS 
than for a minor revision to an existing NAAQS.\6\
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    \6\ For example, implementation of the 1997 PM2.5 
NAAQS required the deployment of a system of new monitors to measure 
ambient levels of that new indicator species for the new NAAQS.

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[[Page 25057]]

    EPA notes that interpretation of section 110(a)(2) is also 
necessary when EPA reviews other types of SIP submissions required 
under the CAA. Therefore, as with infrastructure SIP submissions, EPA 
also has to identify and interpret the relevant elements of section 
110(a)(2) that logically apply to these other types of SIP submissions. 
For example, section 172(c)(7) requires that attainment plan SIP 
submissions required by part D have to meet the ``applicable 
requirements'' of section 110(a)(2). Thus, for example, attainment plan 
SIP submissions must meet the requirements of section 110(a)(2)(A) 
regarding enforceable emission limits and control measures and section 
110(a)(2)(E)(i) regarding air agency resources and authority. By 
contrast, it is clear that attainment plan SIP submissions required by 
part D would not need to meet the portion of section 110(a)(2)(C) that 
pertains to the Prevention of Significant Deterioration (PSD) program 
required in part C of title I of the CAA, because PSD does not apply to 
a pollutant for which an area is designated nonattainment and thus 
subject to part D planning requirements. As this example illustrates, 
each type of SIP submission may implicate some elements of section 
110(a)(2) but not others.
    Given the potential for ambiguity in some of the statutory language 
of section 110(a)(1) and section 110(a)(2), EPA believes that it is 
appropriate to interpret the ambiguous portions of section 110(a)(1) 
and section 110(a)(2) in the context of acting on a particular SIP 
submission. In other words, EPA assumes that Congress could not have 
intended that each and every SIP submission, regardless of the NAAQS in 
question or the history of SIP development for the relevant pollutant, 
would meet each of the requirements, or meet each of them in the same 
way. Therefore, EPA has adopted an approach under which it reviews 
infrastructure SIP submissions against the list of elements in section 
110(a)(2), but only to the extent each element applies for that 
particular NAAQS.
    Historically, EPA has elected to use guidance documents to make 
recommendations to states for infrastructure SIPs, in some cases 
conveying needed interpretations on newly arising issues and in some 
cases conveying interpretations that have already been developed and 
applied to individual SIP submissions for particular elements.\7\ EPA 
most recently issued guidance for infrastructure SIPs on September 13, 
2013 (2013 Guidance).\8\ EPA developed this document to provide states 
with up-to-date guidance for infrastructure SIPs for any new or revised 
NAAQS. Within this guidance, EPA describes the duty of states to make 
infrastructure SIP submissions to meet basic structural SIP 
requirements within three years of promulgation of a new or revised 
NAAQS. EPA also made recommendations about many specific subsections of 
section 110(a)(2) that are relevant in the context of infrastructure 
SIP submissions.\9\ The guidance also discusses the substantively 
important issues that are germane to certain subsections of section 
110(a)(2). Significantly, EPA interprets section 110(a)(1) and (2) such 
that infrastructure SIP submissions need to address certain issues and 
need not address others. Accordingly, EPA reviews each infrastructure 
SIP submission for compliance with the applicable statutory provisions 
of section 110(a)(2), as appropriate.
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    \7\ EPA notes, however, that nothing in the CAA requires EPA to 
provide guidance or to promulgate regulations for infrastructure SIP 
submissions. The CAA directly applies to states and requires the 
submission of infrastructure SIP submissions, regardless of whether 
or not EPA provides guidance or regulations pertaining to such 
submissions. EPA elects to issue such guidance in order to assist 
states, as appropriate.
    \8\ ``Guidance on Infrastructure State Implementation Plan (SIP) 
Elements under Clean Air Act Sections 110(a)(1) and 110(a)(2),'' 
Memorandum from Stephen D. Page, September 13, 2013.
    \9\ EPA's September 13, 2013, guidance did not make 
recommendations with respect to infrastructure SIP submissions to 
address section 110(a)(2)(D)(i)(I). EPA issued the guidance shortly 
after the U.S. Supreme Court agreed to review the D.C. Circuit 
decision in EME Homer City, 696 F.3d 7 (D.C. Cir. 2012) which had 
interpreted the requirements of section 110(a)(2)(D)(i)(I). In light 
of the uncertainty created by ongoing litigation, EPA elected not to 
provide additional guidance on the requirements of section 
110(a)(2)(D)(i)(I) at that time. As the guidance is neither binding 
nor required by statute, whether EPA elects to provide guidance on a 
particular section has no impact on a state's CAA obligations.
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    As an example, section 110(a)(2)(E)(ii) is a required element of 
section 110(a)(2) for infrastructure SIP submissions. Under this 
element, a state must meet the substantive requirements of section 128, 
which pertain to state boards that approve permits or enforcement 
orders and heads of executive agencies with similar powers. Thus, EPA 
reviews infrastructure SIP submissions to ensure that the state's SIP 
appropriately addresses the requirements of section 110(a)(2)(E)(ii) 
and section 128. The 2013 Guidance explains EPA's interpretation that 
there may be a variety of ways by which states can appropriately 
address these substantive statutory requirements, depending on the 
structure of an individual state's permitting or enforcement program 
(e.g., whether permits and enforcement orders are approved by a multi-
member board or by a head of an executive agency). However they are 
addressed by the state, the substantive requirements of section 128 are 
necessarily included in EPA's evaluation of infrastructure SIP 
submissions because section 110(a)(2)(E)(ii) explicitly requires that 
the state satisfy the provisions of section 128.
    As another example, EPA's review of infrastructure SIP submissions 
with respect to the PSD program requirements in section 110(a)(2)(C), 
(D)(i)(II), and (J) focuses upon the structural PSD program 
requirements contained in part C and EPA's PSD regulations. Structural 
PSD program requirements include provisions necessary for the PSD 
program to address all regulated sources and NSR pollutants, including 
Green House Gases (GHGs). By contrast, structural PSD program 
requirements do not include provisions that are not required under 
EPA's regulations at 40 CFR 51.166 but are merely available as an 
option for the state, such as the option to provide grandfathering of 
complete permit applications with respect to the 2012 PM2.5 
NAAQS. Accordingly, the latter optional provisions are types of 
provisions EPA considers irrelevant in the context of an infrastructure 
SIP action.
    For other section 110(a)(2) elements, however, EPA's review of a 
state's infrastructure SIP submission focuses on assuring that the 
state's SIP meets basic structural requirements. For example, section 
110(a)(2)(C) includes, inter alia, the requirement that states have a 
program to regulate minor new sources. Thus, EPA evaluates whether the 
state has an EPA-approved minor new source review program and whether 
the program addresses the pollutants relevant to that NAAQS. In the 
context of acting on an infrastructure SIP submission, however, EPA 
does not think it is necessary to conduct a review of each and every 
provision of a state's existing minor source program (i.e., already in 
the existing SIP) for compliance with the requirements of the CAA and 
EPA's regulations that pertain to such programs.
    With respect to certain other issues, EPA does not believe that an 
action on a state's infrastructure SIP submission is necessarily the 
appropriate type of action in which to address possible deficiencies in 
a state's existing SIP. These issues include: (i) Existing provisions 
related to excess emissions

[[Page 25058]]

from sources during periods of startup, shutdown, or malfunction that 
may be contrary to the CAA and EPA's policies addressing such excess 
emissions (SSM); (ii) existing provisions related to ``director's 
variance'' or ``director's discretion'' that may be contrary to the CAA 
because they purport to allow revisions to SIP-approved emissions 
limits while limiting public process or not requiring further approval 
by EPA; and (iii) existing provisions for PSD programs that may be 
inconsistent with current requirements of EPA's ``Final NSR Improvement 
Rule,'' 67 FR 80186, December 31, 2002, as amended by 72 FR 32526, June 
13, 2007 (``NSR Reform''). Thus, EPA believes it may approve an 
infrastructure SIP submission without scrutinizing the totality of the 
existing SIP for such potentially deficient provisions and may approve 
the submission even if it is aware of such existing provisions.\10\ It 
is important to note that EPA's approval of a state's infrastructure 
SIP submission should not be construed as explicit or implicit re-
approval of any existing potentially deficient provisions that relate 
to the three specific issues just described.
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    \10\ By contrast, EPA notes that if a state were to include a 
new provision in an infrastructure SIP submission that contained a 
legal deficiency, such as a new exemption for excess emissions 
during SSM events, then EPA would need to evaluate that provision 
for compliance against the rubric of applicable CAA requirements in 
the context of the action on the infrastructure SIP.
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    EPA's approach to review of infrastructure SIP submissions is to 
identify the CAA requirements that are logically applicable to that 
submission. EPA believes that this approach to the review of a 
particular infrastructure SIP submission is appropriate, because it 
would not be reasonable to read the general requirements of section 
110(a)(1) and the list of elements in 110(a)(2) as requiring review of 
each and every provision of a state's existing SIP against all 
requirements in the CAA and EPA regulations merely for purposes of 
assuring that the state in question has the basic structural elements 
for a functioning SIP for a new or revised NAAQS. Because SIPs have 
grown by accretion over the decades as statutory and regulatory 
requirements under the CAA have evolved, they may include some outmoded 
provisions and historical artifacts. These provisions, while not fully 
up to date, nevertheless may not pose a significant problem for the 
purposes of ``implementation, maintenance, and enforcement'' of a new 
or revised NAAQS when EPA evaluates adequacy of the infrastructure SIP 
submission. EPA believes that a better approach is for states and EPA 
to focus attention on those elements of section 110(a)(2) of the CAA 
most likely to warrant a specific SIP revision due to the promulgation 
of a new or revised NAAQS or other factors.
    For example, EPA's 2013 Guidance gives simpler recommendations with 
respect to carbon monoxide than other NAAQS pollutants to meet the 
visibility requirements of section 110(a)(2)(D)(i)(II), because carbon 
monoxide does not affect visibility. As a result, an infrastructure SIP 
submission for any future new or revised NAAQS for carbon monoxide need 
only state this fact in order to address the visibility prong of 
section 110(a)(2)(D)(i)(II).
    Finally, EPA believes that its approach with respect to 
infrastructure SIP requirements is based on a reasonable reading of 
section 110(a)(1) and (2) because the CAA provides other avenues and 
mechanisms to address specific substantive deficiencies in existing 
SIPs. These other statutory tools allow EPA to take appropriately 
tailored action, depending upon the nature and severity of the alleged 
SIP deficiency. Section 110(k)(5) authorizes EPA to issue a ``SIP 
call'' whenever the Agency determines that a state's SIP is 
substantially inadequate to attain or maintain the NAAQS, to mitigate 
interstate transport, or to otherwise comply with the CAA.\11\ Section 
110(k)(6) authorizes EPA to correct errors in past actions, such as 
past approvals of SIP submissions.\12\ Significantly, EPA's 
determination that an action on a state's infrastructure SIP submission 
is not the appropriate time and place to address all potential existing 
SIP deficiencies does not preclude EPA's subsequent reliance on 
provisions in section 110(a)(2) as part of the basis for action to 
correct those deficiencies at a later time. For example, although it 
may not be appropriate to require a state to eliminate all existing 
inappropriate director's discretion provisions in the course of acting 
on an infrastructure SIP submission, EPA believes that section 
110(a)(2)(A) may be among the statutory bases that EPA relies upon in 
the course of addressing such deficiency in a subsequent action.\13\
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    \11\ For example, EPA issued a SIP call to Utah to address 
specific existing SIP deficiencies related to the treatment of 
excess emissions during SSM events. See ``Finding of Substantial 
Inadequacy of Implementation Plan; Call for Utah State 
Implementation Plan Revisions,'' 74 FR 21639, April 18, 2011.
    \12\ EPA has used this authority to correct errors in past 
actions on SIP submissions related to PSD programs. See ``Limitation 
of Approval of Prevention of Significant Deterioration Provisions 
Concerning Greenhouse Gas Emitting-Sources in State Implementation 
Plans; Final Rule,'' 75 FR 82536, December 30, 2010. EPA has 
previously used its authority under CAA section 110(k)(6) to remove 
numerous other SIP provisions that the Agency determined it had 
approved in error. See, e.g., 61 FR 38664, July 25, 1996 and 62 FR 
34641, June 27, 1997 (corrections to American Samoa, Arizona, 
California, Hawaii, and Nevada SIPs); 69 FR 67062, November 16, 2004 
(corrections to California SIP); and 74 FR 57051, November 3, 2009 
(corrections to Arizona and Nevada SIPs).
    \13\ See, e.g., EPA's disapproval of a SIP submission from 
Colorado on the grounds that it would have included a director's 
discretion provision inconsistent with CAA requirements, including 
section 110(a)(2)(A). See, e.g., 75 FR 42342 at 42344, July 21, 2010 
(proposed disapproval of director's discretion provisions); 76 FR 
4540, January 26, 2011 (final disapproval of such provisions).
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IV. Proposed Action

    EPA is proposing to approve Maryland's submittal that provides the 
basic program elements specified in section 110(a)(2)(A), (B), (C), 
(D)(i)(II), (D)(ii), (E), (F), (G), (H), (J), (K), (L), and (M) 
necessary to implement, maintain, and enforce the 2008 ozone NAAQS with 
the exception of the Part D, Title I nonattainment planning 
requirements of section 110(a)(2)(I), and the portion of the submittal 
relating to section 110(a)(2)(D)(i)(I) on which EPA will take separate 
action. EPA is soliciting public comments on the issues discussed in 
this document. These comments will be considered before taking final 
rulemaking action.

V. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP 
submission that complies with the provisions of the CAA and applicable 
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in 
reviewing SIP submissions, EPA's role is to approve state choices, 
provided that they meet the criteria of the CAA. Accordingly, this 
action merely approves state law as meeting Federal requirements and 
does not impose additional requirements beyond those imposed by state 
law. For that reason, this proposed action:
     Is not a ``significant regulatory action'' subject to 
review by the Office of Management and Budget under Executive Order 
12866 (58 FR 51735, October 4, 1993);
     does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     is certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);

[[Page 25059]]

     does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);
     does not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     is not an economically significant regulatory action based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     is not subject to requirements of Section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) because application of those requirements would be inconsistent 
with the CAA; and
     does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    In addition, this proposed rule, which satisfies certain 
infrastructure requirements of section 110(a)(2) of the CAA for the 
2008 ozone NAAQS for the State of Maryland, does not have tribal 
implications as specified by Executive Order 13175 (65 FR 67249, 
November 9, 2000), because the SIP is not approved to apply in Indian 
country located in the state, and EPA notes that it will not impose 
substantial direct costs on tribal governments or preempt tribal law.

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Ozone, Volatile organic compounds, Nitrogen dioxide, 
Reporting and recordkeeping requirements.

    Authority:  42 U.S.C. 7401 et seq.

    Dated: April 18, 2014.
W. C. Early,
Acting Regional Administrator, Region III.
[FR Doc. 2014-10105 Filed 5-1-14; 8:45 am]
BILLING CODE 6560-50-P