Approval and Promulgation of Implementation Plans and Designations of Areas for Air Quality Planning Purposes; Georgia: Redesignation of the Murray County 8-Hour Ozone Nonattainment Area to Attainment for Ozone

[Federal Register: August 29, 2007 (Volume 72, Number 167)]
[Proposed Rules]
[Page 49679-49689]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr29au07-19]

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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 52 and 81
[EPA-R04-OAR-2007-0549-200727; FRL-8461-7]

Approval and Promulgation of Implementation Plans and
Designations of Areas for Air Quality Planning Purposes; Georgia:
Redesignation of the Murray County 8-Hour Ozone Nonattainment Area to
Attainment for Ozone

AGENCY: Environmental Protection Agency (EPA).
ACTION: Proposed rule.

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SUMMARY: On June 15, 2007, the State of Georgia, through the Georgia
Environmental Protection Division (EPD), submitted a request to
redesignate the Murray County 8-hour ozone nonattainment area (Murray
County Area) to attainment for the 8-hour ozone National Ambient Air
Quality Standard (NAAQS); and to approve a State Implementation Plan
(SIP) revision containing a maintenance plan for the Murray County
Area. The Murray County 8-hour nonattainment ozone area is a partial
county area, comprised of the portion of Murray County that makes up
the Chattahoochee National Forest. In this action, EPA is proposing to
approve Georgia's 8-hour ozone redesignation request for the Murray
County Area. Additionally, EPA is proposing to approve the 8-hour ozone
maintenance plan for the Murray County Area, including the regional
motor vehicle emissions budgets (MVEBs) for nitrogen oxides
(NO_X) and volatile organic compounds (VOCs). This proposed
approval of Georgia's redesignation request is based on EPA's
determination that Georgia has demonstrated that the Murray County Area
has met the criteria for redesignation to attainment specified in the
Clean Air Act (CAA), including the determination that the Murray County
8-hour ozone nonattainment area has attained the 8-hour ozone standard.
In this action, EPA is also describing the status of its transportation
conformity adequacy determination for the new regional MVEBs for 2018
that are contained in the 8-hour ozone maintenance plan for the Murray
County Area.

DATES: Comments must be received on or before September 28, 2007.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R04-
OAR-2007-0549, by one of the following methods:
(a) http://www.regulations.gov: Follow the on-line instructions for
submitting comments.
(b) E-mail: Harder.Stacy@epa.gov.
(c) Fax: (404) 562-9019.
(d) Mail: EPA-R04-OAR-2007-0549, Regulatory Development Section,
Air Planning Branch, Air, Pesticides and Toxics Management Division,
U.S. Environmental Protection Agency, Region 4, 61 Forsyth Street, SW.,
Atlanta, Georgia 30303-8960.
(e) Hand Delivery or Courier: Stacy Harder, Regulatory Development
Section, Air Planning Branch, Air, Pesticides and Toxics Management
Division, U.S. Environmental Protection Agency, Region 4, 61 Forsyth
Street, SW., Atlanta, Georgia 30303-8960. Such deliveries are only
accepted during the Regional Office's normal hours of operation. The
Regional Office's official hours of business are Monday through Friday,
8:30 to 4:30, excluding Federal holidays.
Instructions: Direct your comments to Docket ID No. EPA-R04-OAR-
2007-0549. EPA's policy is that all comments received will be included
in the public docket without change and may be made available online at
http://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 through http://
www.regulations.gov or e-mail, information that you consider to be CBI
or otherwise protected. The http://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 e-mail comment directly to EPA without
going through http://www.regulations.gov, your e-mail 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. For additional information about EPA's public
docket visit the EPA Docket Center homepage at
http://www.epa.gov/epahome/dockets.htm.

[[Page 49680]]

Docket: All documents in the electronic docket are listed in the
http://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 http://www.regulations.gov
or in hard copy at the Regulatory Development Section, Air Planning
Branch, Air, Pesticides and Toxics Management Division, U.S.
Environmental Protection Agency, Region 4, 61 Forsyth Street, SW.,
Atlanta, Georgia 30303-8960. EPA requests that if at all possible, you
contact the person listed in the FOR FURTHER INFORMATION CONTACT
section to schedule your inspection. The Regional Office's official
hours of business are Monday through Friday, 8:30 to 4:30, excluding
federal holidays.

FOR FURTHER INFORMATION CONTACT: Ms. Stacy Harder of the Regulatory
Development Section at the Air Planning Branch, Air, Pesticides and
Toxics Management Division, U.S. Environmental Protection Agency,
Region 4, 61 Forsyth Street, SW., Atlanta, Georgia 30303-8960. Ms.
Harder's telephone number is (404) 562-9042. She can also be reached
via electronic mail at harder.stacy@epa.gov.

SUPPLEMENTARY INFORMATION:

Table of Contents

I. What Proposed Actions is EPA Taking?
II. What Is the Background for EPA's Proposed Actions?
III. What Are the Criteria for Redesignation?
IV. Why Is EPA Proposing These Actions?
V. What Is the Effect of EPA's Proposed Actions?
VI. What Is EPA's Analysis of the Request?
VII. What Are the Proposed Regional MVEBs for the Murray County Area?
VIII. What Is the Status of EPA's Adequacy Determination for MVEBs
for the Year 2018 for the Murray County Area?
IX. Proposed Action on the Redesignation Request and Maintenance
Plan SIP Revision Including Proposed Approval of the 2018 MVEBs
X. Statutory and Executive Order Reviews

I. What Proposed Actions Is EPA Taking?

EPA is proposing to take two related actions, which are summarized
below and described in greater detail throughout this notice of
proposed rulemaking: (1) to redesignate the Murray County Area to
attainment for the 8-hour ozone NAAQS; and (2) to approve Georgia's 8-
hour ozone maintenance plan into the Georgia SIP, including the
associated MVEBs. EPA is also notifying the public of the status of
EPA's adequacy determination for the Murray County Area MVEBs.
First, EPA is proposing to determine that the Murray County Area
has attained the 8-hour ozone standard, and that the Murray County Area
has met the requirements for redesignation under section 107(d)(3)(E)
of the CAA. EPA is now proposing to approve a request to change the
legal designation of the Murray County Area from nonattainment to
attainment for the 8-hour ozone NAAQS.
Second, EPA is proposing to approve Georgia's 8-hour ozone
maintenance plan for the Murray County Area (such approval being one of
the CAA criteria for redesignation to attainment status). The
maintenance plan is designed to help keep the Murray County Area in
attainment with the 8-hour ozone NAAQS through 2018. Consistent with
the CAA, the maintenance plan that EPA is proposing to approve today
also includes 2018 regional MVEBs for NO_X and VOCs.
Therefore, EPA is proposing to approve into the Georgia SIP the 2018
regional MVEBs that are included as part of Georgia's maintenance plan.
These regional MVEBs apply to the Murray County Area.
In this proposed rulemaking, EPA is notifying the public of the
status of EPA's adequacy process for the newly established 2018 MVEBs
for the Murray County Area. The adequacy comment period for the Murray
County Area's 2018 MVEBs began on June 21, 2007, with EPA's posting of
the availability of this submittal on EPA's Adequacy Web Site (http://
www.epa.gov/otaq/stateresources/transconf/currsips.htm). The adequacy
comment period for these MVEBs closed on July 23, 2007. No adverse
comments were received on this submittal during the adequacy public
comment period. Please see section VIII of this proposed rulemaking for
further explanation of this process, and for more details on the MVEBs.
Today's notice of proposed rulemaking is in response to Georgia's
June 15, 2007, SIP submittal. The June 15, 2007, submittal requests
redesignation of the Murray County Area, and included a SIP revision
addressing the specific issues summarized above and the necessary
elements for redesignation described in section 107(d)(3)(E) of the CAA.

II. What Is the Background for EPA's Proposed Actions?

Ground-level ozone is not emitted directly by sources. Rather,
emissions of NO_X and VOCs react in the presence of sunlight
to form ground-level ozone. NO_X and VOCs are referred to as
precursors of ozone. The CAA establishes a process for air quality
management through the NAAQS.
On July 18, 1997, EPA promulgated a revised 8-hour ozone standard
of 0.08 parts per million (ppm). This new standard is more stringent
than the previous 1-hour ozone standard. Under EPA regulations at 40
CFR part 50, the 8-hour ozone standard is attained when the 3-year
average of the annual fourth highest daily maximum 8-hour average
ambient air quality ozone concentrations is less than or equal to 0.08
ppm (i.e., 0.084 ppm when rounding is considered). (See, 69 FR 23857
(April 30, 2004) for further information.) Ambient air quality
monitoring data for the 3-year period must meet a data completeness
requirement. The ambient air quality monitoring data completeness
requirement is met when the average percent of days with valid ambient
monitoring data is greater than 90 percent, and no single year has less
than 75 percent data completeness as determined in Appendix I of part
50. Specifically, section 2.3 of 40 CFR part 50, Appendix I,
``Comparisons with the Primary and Secondary Ozone Standards'' states:

The primary and secondary ozone ambient air quality standards
are met at an ambient air quality monitoring site when the 3-year
average of the annual fourth-highest daily maximum 8-hour average
ozone concentration is less than or equal to 0.08 ppm. The number of
significant figures in the level of the standard dictates the
rounding convention for comparing the computed 3-year average annual
fourth-highest daily maximum 8-hour average ozone concentration with
the level of the standard. The third decimal place of the computed
value is rounded, with values equal to or greater than 5 rounding
up. Thus, a computed 3-year average ozone concentration of 0.085 ppm
is the smallest value that is greater than 0.08 ppm.

The CAA required EPA to designate as nonattainment any area that
was violating the 8-hour ozone NAAQS based on the three most recent
years of ambient air quality data. The Murray County 8-hour ozone
nonattainment area was designated using 2001-2003 ambient air quality
data. The Federal Register document making these designations was
signed on April 15, 2004, and published on April 30, 2004 (69 FR 23857).
The CAA contains two sets of provisions--subpart 1 and subpart 2--
that address planning and control requirements for ozone nonattainment
areas. (Both are found in title I, part D.) Subpart 1 (which EPA refers
to as

[[Page 49681]]

``basic'' nonattainment) contains general, less prescriptive,
requirements for nonattainment areas for any pollutant--including
ozone--governed by a NAAQS. Subpart 2 (which EPA refers to as
``classified'' nonattainment) provides more specific requirements for
certain ozone nonattainment areas. Some 8-hour ozone nonattainment
areas are subject only to the provisions of subpart 1. Other 8-hour
ozone nonattainment areas are also subject to the provisions of subpart
2. Under EPA's Phase 1 8-hour ozone implementation rule (69 FR 23857)
(Phase 1 Rule), signed on April 15, 2004, and published April 30, 2004,
an area was classified under subpart 2 based on its 8-hour ozone design
value (i.e., the 3-year average of the annual fourth-highest daily
maximum 8-hour average ozone concentrations), if it had a 1-hour design
value at or above 0.121 ppm (the lowest 1-hour design value in Table 1
of subpart 2). All other areas are covered under subpart 1, based upon
their 8-hour ambient air quality design values.
On April 30, 2004, EPA designated the Murray County Area as a
``basic'' 8-hour ozone nonattainment area (see, 69 FR 23857, April 30,
2004). Thus, on June 15, 2007, when Georgia submitted its final
redesignation request, the Murray County Area was classified under subpart
1 of the CAA, and was obligated to meet only the subpart 1 requirements.
Various aspects of EPA's Phase 1 8-hour ozone implementation rule
were challenged in court. On December 22, 2006, the U.S. Court of
Appeals for the District of Columbia Circuit (D.C. Circuit Court)
vacated EPA's Phase 1 Implementation Rule for the 8-hour Ozone Standard
(69 FR 23951, April 30, 2004). South Coast Air Quality Management Dist.
(SCAQMD) v. EPA, 472 F.3d 882 (D.C.Cir. 2006). On June 8, 2007, in
response to several petitions for rehearing, the D.C. Circuit Court
clarified that the Phase 1 Rule was vacated only with regard to those
parts of the Rule that had been successfully challenged. Therefore, the
Phase 1 Rule provisions related to classifications for areas currently
classified under subpart 2 of title I, part D of the CAA as 8-hour
nonattainment areas, the 8-hour attainment dates and the timing for
emissions reductions needed for attainment of the 8-hour ozone NAAQS
remain effective. The June 8th decision left intact the Court's
rejection of EPA's reasons for implementing the 8-hour standard in
certain nonattainment areas under subpart 1 in lieu of subpart 2. By
limiting the vacatur, the Court let stand EPA's revocation of the 1-
hour standard and those anti-backsliding provisions of the Phase 1 Rule
that had not been successfully challenged. The June 8th decision
reaffirmed the December 22, 2006, decision that EPA had improperly
failed to retain measures required for 1-hour nonattainment areas under
the anti-backsliding provisions of the regulations: (1) Nonattainment
area New Source Review (NSR) requirements based on an area's 1-hour
nonattainment classification; (2) Section 185 penalty fees for 1-hour
severe or extreme nonattainment areas; and (3) measures to be
implemented pursuant to section 172(c)(9) or 182(c)(9) of the CAA, on
the contingency of an area not making reasonable further progress
toward attainment of the 1-hour NAAQS, or for failure to attain that
NAAQS. The June 8th decision clarified that the Court's reference to
conformity requirements for anti-backsliding purposes was limited to
requiring the continued use of 1-hour MVEBs until 8-hour budgets were
available for 8-hour conformity determinations, which is already
required under EPA's conformity regulations. The Court thus clarified
that 1-hour conformity determinations are not required for anti-
backsliding purposes.
This section sets forth EPA's views on the potential effect of the
Court's rulings on this proposed redesignation action. For the reasons
set forth below, EPA does not believe that the Court's rulings alter
any requirements relevant to this redesignation action so as to
preclude redesignation, and do not prevent EPA from proposing or
ultimately finalizing this redesignation. EPA believes that the Court's
December 22, 2006, and June 8, 2007, decisions impose no impediment to
moving forward with redesignation of the Murray County Area to
attainment. Even in light of the Court's decisions, redesignation is
appropriate under the relevant redesignation provisions of the CAA and
longstanding policies regarding redesignation requests.
With respect to the 8-hour standard, the Court's ruling rejected
EPA's reasons for classifying areas under subpart 1 for the 8-hour
standard, and remanded that matter to the Agency. Consequently, it is
possible that this Area could, during a remand to EPA, be reclassified
under subpart 2. Although any future decision by EPA to classify this
area under subpart 2 might trigger additional future requirements for
the area, EPA believes that this does not mean that redesignation of
the area cannot now go forward. This belief is based upon (1) EPA's
longstanding policy of evaluating redesignation requests in accordance
with the requirements due at the time the request is submitted; and (2)
consideration of the inequity of applying retroactively any
requirements that might in the future be applied.
First, at the time the redesignation request was submitted, the
Murray County Area was classified under subpart 1 and was obligated to
meet only subpart 1 requirements. Under EPA's longstanding
interpretation of section 107(d)(3)(E) of the CAA, to qualify for
redesignation, states requesting redesignation to attainment must meet
only the relevant SIP requirements that came due prior to the submittal
of a complete redesignation request. See, September 4, 1992, Calcagni
Memorandum (``Procedures for Processing Requests to Redesignate Areas
to Attainment,'' Memorandum from John Calcagni, Director, Air Quality
Management Division). See also, Michael Shapiro Memorandum, September
17, 1993, and 60 FR 12459, 12465-66 (March 7, 1995) (Redesignation of
Detroit-Ann Arbor, Michigan). See, Sierra Club v. EPA, 375 F.3d 537
(7th Cir. 2004), which upheld this interpretation. See, e.g. also, 68 FR
25418, 25424, 25427 (May 12, 2003) (redesignation of St. Louis, Missouri).
Moreover, it would be inequitable to retroactively apply any new
SIP requirements that were not applicable at the time the request was
submitted. The D.C. Circuit Court has recognized the inequity in such
retroactive rulemaking (Sierra Club v. Whitman, 285 F.3d 63 (D.C. Cir.
2002)), in which the Court upheld a district court's ruling refusing to
make retroactive an EPA determination of nonattainment that was past
the statutory due date. Such a determination would have resulted in the
imposition of additional requirements on the area. The Court stated,
``Although EPA failed to make the nonattainment determination within
the statutory time frame, Sierra Club's proposed solution only makes
the situation worse. Retroactive relief would likely impose large costs
on the States, which would face fines and suits for not implementing
air pollution prevention plans in 1997, even though they were not on
notice at the time.'' Id. at 68. Similarly here, it would be unfair to
penalize the area by applying to it for purposes of redesignation,
additional SIP requirements under subpart 2 that were not in effect at
the time it submitted its redesignation request.
As noted earlier, in 2004, the ambient ozone data for the Murray
County Area indicated no further violations of the 8-hour ozone NAAQS,
using data from the 3-year period of 2002-2004 to demonstrate
attainment. As a result, on June 15, 2007, Georgia requested
redesignation of the Murray County

[[Page 49682]]

Area to attainment for the 8-hour ozone NAAQS. The redesignation
request included three years of complete, quality-assured ambient air
quality data for the ozone seasons (March 1st until October 31st) of
2002-2004, indicating that the 8-hour ozone NAAQS has been achieved for
the Murray County Area. Under the CAA, nonattainment areas may be
redesignated to attainment if sufficient, complete, quality-assured
data is available for the Administrator to determine that the area has
attained the standard and the area meets the other CAA redesignation
requirements in section 107(d)(3)(E).

III. What Are the Criteria for Redesignation?

The CAA provides the requirements for redesignating a nonattainment
area to attainment. Specifically, section 107(d)(3)(E) of the CAA
allows for redesignation providing that: (1) The Administrator
determines that the area has attained the applicable NAAQS; (2) the
Administrator has fully approved the applicable implementation plan for
the area under section 110(k); (3) the Administrator determines that
the improvement in air quality is due to permanent and enforceable
reductions in emissions resulting from implementation of the applicable
SIP and applicable Federal air pollutant control regulations and other
permanent and enforceable reductions; (4) the Administrator has fully
approved a maintenance plan for the area as meeting the requirements of
section 175A; and, (5) the state containing such area has met all
requirements applicable to the area under section 110 and part D of the
CAA.
EPA provided guidance on redesignation in the General Preamble for
the Implementation of Title I of the CAA Amendments of 1990, on April
16, 1992 (57 FR 13498), and supplemented this guidance on April 28,
1992 (57 FR 18070). EPA has provided further guidance on processing
redesignation requests in the following documents:
1. ``Ozone and Carbon Monoxide Design Value Calculations,''
Memorandum from Bill Laxton, Director, Technical Support Division, June
18, 1990;
2. ``Maintenance Plans for Redesignation of Ozone and Carbon
Monoxide Nonattainment Areas,'' Memorandum from G.T. Helms, Chief,
Ozone/Carbon Monoxide Programs Branch, April 30, 1992;
3. ``Contingency Measures for Ozone and Carbon Monoxide (CO)
Redesignations,'' Memorandum from G. T. Helms, Chief, Ozone/Carbon
Monoxide Programs Branch, June 1, 1992;
4. ``Procedures for Processing Requests to Redesignate Areas to
Attainment,'' Memorandum from John Calcagni, Director, Air Quality
Management Division, September 4, 1992 (hereafter referred to as the
``Calcagni Memorandum'');
5. ``State Implementation Plan (SIP) Actions Submitted in Response
to Clean Air Act (ACT) Deadlines,'' Memorandum from John Calcagni,
Director, Air Quality Management Division, October 28, 1992;
6. ``Technical Support Documents (TSD's) for Redesignation of Ozone
and Carbon Monoxide (CO) Nonattainment Areas,'' Memorandum from G. T.
Helms, Chief, Ozone/Carbon Monoxide Programs Branch, August 17, 1993;
7. ``State Implementation Plan (SIP) Requirements for Areas
Submitting Requests for Redesignation to Attainment of the Ozone and
Carbon Monoxide (CO) National Ambient Air Quality Standards (NAAQS) On
or After November 15, 1992,'' Memorandum from Michael H. Shapiro,
Acting Assistant Administrator for Air and Radiation, September 17, 1993;
8. ``Use of Actual Emissions in Maintenance Demonstrations for
Ozone and CO Nonattainment Areas,'' Memorandum from D. Kent Berry,
Acting Director, Air Quality Management Division, November 30, 1993;
9. ``Part D New Source Review (Part D NSR) Requirements for Areas
Requesting Redesignation to Attainment,'' Memorandum from Mary D. Nichols,
Assistant Administrator for Air and Radiation, October 14, 1994; and
10. ``Reasonable Further 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.

IV. Why Is EPA Proposing These Actions?

On June 15, 2007, Georgia requested redesignation of the Murray
County 8-hour ozone nonattainment area to attainment for the 8-hour
ozone standard. EPA's evaluation indicates that Georgia has
demonstrated that the Murray County Area has attained the standard and
has met the requirements for redesignation set forth in section
107(d)(3)(E) of the CAA. EPA is also announcing the status of its
adequacy determination for the 2018 regional MVEBs, which is relevant
to the requested redesignation.

V. What Is the Effect of EPA's Proposed Actions?

EPA's proposed actions establish the basis upon which EPA may take
final action on the issues being proposed for approval today. Approval
of Georgia's redesignation request would change the legal designation
of the Murray County Area for the 8-hour ozone NAAQS found at 40 CFR
part 81. Approval of Georgia's request would also incorporate into the
Georgia SIP, a plan for the Murray County Area for maintaining the 8-
hour ozone NAAQS in the area through 2018. This maintenance plan
includes contingency measures to remedy future violations of the 8-hour
ozone NAAQS. The maintenance plan also establishes regional MVEBs for
the year 2018 of 0.0117 tons per day (tpd) for VOCs and 0.0129 tpd for
NO_X, for the Murray County Area. Approval of Georgia's
maintenance plan would also result in approval of the regional MVEBs.
Additionally, EPA is notifying the public of the status of its adequacy
determination for the 2018 regional MVEBs, pursuant to 40 CFR 93.118(f)(1).

VI. What Is EPA's Analysis of the Request?

EPA is proposing to make the determination that the Murray County
Area has attained the 8-hour ozone standard, and that all other
redesignation criteria have been met for the Murray County Area. The
basis for EPA's determination for the area is discussed in greater
detail below.

Criteria (1)--The Murray County Area Has Attained the 8-Hour Ozone NAAQS

EPA is proposing to determine that the Murray County Area has
attained the 8-hour ozone NAAQS. For ozone, an area may be considered
to be attaining the 8-hour ozone NAAQS if there are no violations, as
determined in accordance with 40 CFR 50.10 and Appendix I of part 50,
based on three complete, consecutive calendar years of quality-assured
air quality monitoring data. To attain this standard, the 3-year
average of the fourth-highest daily maximum 8-hour average ozone
concentrations measured at each monitor within an area over each year
must not exceed 0.08 ppm. Based on the rounding convention described in
40 CFR part 50, Appendix I, the standard is attained if the design
value is 0.084 ppm or below. The data must be collected and quality-
assured in accordance with 40 CFR part 58, and recorded in the EPA Air
Quality System (AQS). The monitors generally

[[Page 49683]]

should have remained at the same location for the duration of the
monitoring period required for demonstrating attainment.
EPA reviewed ozone monitoring data from the ambient ozone
monitoring station in the Murray County Area for the ozone season from
2002--2004. This data has been quality assured and is recorded in AQS.
The fourth high average for 2002, 2003, and 2004, and the 3-year
average of these values (i.e., design values), are summarized in the
following table:

Table 1.--Annual 4th Max High and Design Value Concentration for 8-Hour Ozone for the Murray County Area (In Parts per Million)
--------------------------------------------------------------------------------------------------------------------------------------------------------
4th highest value (ppm) 3-year
----------------------------------------------------------------------------- average
Site name ----------
2000 2001 2002 2003 2004 2005 2006 2002-2004
--------------------------------------------------------------------------------------------------------------------------------------------------------
Fort Mountain................................................... 0.091 0.080 0.092 0.085 0.074 0.080 0.074 0.084
--------------------------------------------------------------------------------------------------------------------------------------------------------

As discussed above, the design value for an area is the highest
design value recorded at any monitor in the area. Therefore, the design
value for the Murray County Area is 0.084 ppm, which meets the standard
as described above. As discussed in more detail below, Georgia has
committed to continue monitoring in this area in accordance with 40 CFR
part 58. The data submitted by Georgia provides an adequate
demonstration that the Murray County Area has attained the 8-hour ozone
NAAQS. Additional data for 2005 and 2006 show continued attainment;
however, the analysis for EPD's submittal was initiated prior to the
certification of 2005 and 2006 data, which provides an even greater
margin of compliance.

Criteria (2)--Georgia Has a Fully Approved SIP Under Section 110(k) For
the Murray County Area and Criteria (5)--Has Met All Applicable
Requirements Under Section 110 and Part D of the CAA

Below is a summary of how these two criteria were met.
EPA has determined that Georgia has met all applicable SIP
requirements for the Murray County Area under section 110 of the CAA
(general SIP requirements). EPA has also determined that the Georgia
SIP satisfies the criterion that it meet applicable SIP requirements
under part D of title I of the CAA (requirements specific to subpart 1
basic 8-hour ozone nonattainment areas) in accordance with section
107(d)(3)(E)(v). In addition, EPA has determined that the SIP is fully
approved with respect to all applicable requirements in accordance with
section 107(d)(3)(E)(ii). In making these determinations, EPA
ascertained which requirements are applicable to the area and that if
applicable, they are fully approved under section 110(k). SIPs must be
fully approved only with respect to applicable requirements.
a. The Murray County Area Has Met All Applicable Requirements Under
Section 110 and Part D of the CAA
The September 4, 1992, Calcagni Memorandum (see ``Procedures for
Processing Requests to Redesignate Areas to Attainment,'' Memorandum
from John Calcagni, Director, Air Quality Management Division,
September 4, 1992) describes EPA's interpretation of section
107(d)(3)(E). Under this interpretation, to qualify for redesignation,
states requesting redesignation to attainment must meet only the
relevant CAA requirements that come due prior to the submittal of a
complete redesignation request. See also, Michael Shapiro Memorandum,
(``SIP Requirements for Areas Submitting Requests for Redesignation to
Attainment of the Ozone and Carbon Monoxide NAAQS On or After November
15, 1992,'' September 17, 1993), and 60 FR 12459, 12465-66 (March 7,
1995) (redesignation of Detroit-Ann Arbor, Michigan). Applicable
requirements of the CAA that come due subsequent to the area's
submittal of a complete redesignation request remain applicable until a
redesignation is approved, but are not required as a prerequisite to
redesignation. See, section 175A(c) of the CAA; Sierra Club, 375 F.3d
537; see also, 68 FR 25424, 25427 (May 12, 2003) (redesignation of St.
Louis, Missouri).
General SIP requirements. Section 110(a)(2) of title I of the CAA
delineates the general requirements for a SIP, which include
enforceable emissions limitations and other control measures, means, or
techniques, provisions for the establishment and operation of
appropriate devices necessary to collect data on ambient air quality,
and programs to enforce the limitations. General SIP elements and
requirements are delineated in section 110(a)(2) of title I, part A of
the CAA. These requirements include, but are not limited to, the
following: submittal of a SIP that has been adopted by the state after
reasonable public notice and hearing; provisions for establishment and
operation of appropriate procedures needed to monitor ambient air
quality; implementation of a source permit program; provisions for the
implementation of part C requirements (Prevention of Significant
Deterioration (PSD)) and provisions for the implementation of part D
requirements (NSR permit programs); provisions for air pollution
modeling; and provisions for public and local agency participation in
planning and emission control rule development.
Section 110(a)(2)(D) requires that SIPs contain certain measures to
prevent sources in a state from significantly contributing to air
quality problems in another state. To implement this provision, EPA has
required certain states to establish programs to address the transport
of air pollutants (NO_X SIP Call, Clean Air Interstate Rule
(CAIR)). EPA has also found, generally, that states have not submitted
SIPs under section 110(a)(1) to meet the interstate transport
requirements of section 110(a)(2)(D)(i). However, the section
110(a)(2)(D) requirements for a state are not linked with a particular
nonattainment area's designation and classification in that state. EPA
believes that the requirements linked with a particular nonattainment
area's designation and classifications are the relevant measures to
evaluate in reviewing a redesignation request. The transport SIP
submittal requirements, where applicable, continue to apply to a state
regardless of the designation of any one particular area in the state.
Thus, we do not believe that the CAA's interstate transport
requirements should be construed to be applicable requirements for
purposes of redesignation.
In addition, EPA believes that the other section 110 elements not
connected with nonattainment plan

[[Page 49684]]

submissions and not linked with an area's attainment status are not
applicable requirements for purposes of redesignation. The area will
still be subject to these requirements after the area is redesignated.
The section 110 and part D requirements, which are linked with a
particular area's designation and classification, are the relevant
measures to evaluate in reviewing a redesignation request. This
approach is consistent with EPA's existing policy on applicability
(i.e., for redesignations) of conformity and oxygenated fuels
requirements, as well as with section 184 ozone transport requirements.
See, Reading, Pennsylvania, proposed and final rulemakings (61 FR
53174-53176, October 10, 1996), (62 FR 24826, May 7, 1997); Cleveland-
Akron-Loraine, Ohio, final rulemaking (61 FR 20458, May 7, 1996); and
Tampa, Florida, final rulemaking at (60 FR 62748, December 7, 1995).
See also, the discussion on this issue in the Cincinnati, Ohio
redesignation (65 FR 37890, June 19, 2000), and in the Pittsburgh,
Pennsylvania redesignation (66 FR 50399, October 19, 2001).
EPA believes that section 110 elements not linked to the area's
nonattainment status are not applicable for purposes of redesignation.
Any section 110 requirements that are linked to the part D requirements
for 8-hour ozone nonattainment areas are not yet due, since, as
explained below, no part D requirements for 8-hour standard became due
prior to submission of the redesignation request. Therefore, as
discussed above, for purposes of redesignation, they are not considered
applicable requirements. Nonetheless, EPA notes it has previously
approved provisions in the Georgia SIP addressing section 110 elements
under the 1-hour ozone NAAQS (See, 70 FR 34660, June 15, 2005). EPA
believes that the section 110 SIP approved for the 1-hour ozone NAAQS
is also sufficient to meet the requirements under the 8-hour ozone
NAAQS (as well as satisfying the issues raised by the D.C. Circuit
Court in the SCAQMD case).
Part D requirements. EPA has also determined that the Georgia SIP
meets applicable SIP requirements under part D of the CAA since no
requirements became due prior to the submission of the Area's
redesignation request. Sections 172-176 of the CAA, found in subpart 1
of part D, set forth the basic nonattainment requirements applicable to
all nonattainment areas. Section 182 of the CAA, found in subpart 2 of
part D, establishes additional specific requirements depending on the
area's nonattainment classification. Subpart 2 is not applicable to the
Murray County Area.
Part D, subpart 1 applicable SIP requirements. For purposes of
evaluating this redesignation request, the applicable part D, subpart 1
SIP requirements for all nonattainment areas are contained in sections
172(c)(1)-(9). A thorough discussion of the requirements contained in
section 172 can be found in the General Preamble for Implementation of
title I (57 FR 13498). No requirements applicable for purposes of
redesignation under part D became due prior to the submission of the
redesignation request, and therefore none are applicable to the Area
for purposes of redesignation. For example, the requirements for an
attainment demonstration that meets the requirements of section
172(c)(1) are not yet applicable, nor are the requirements for
Reasonably Achievable Control Technology (RACT) and Reasonably
Available Control Measures (RACM) (section 172(c)(1)), reasonable
further progress (RFP) (section 172(c)(2)), and contingency measures
(section 172(c)(9)).
In addition to the fact that no part D requirements applicable for
purposes of redesignation became due prior to submission of the
redesignation request and therefore are not applicable, EPA believes it
is reasonable to interpret the conformity and NSR requirements as not
requiring approval prior to redesignation.
Section 176 Conformity Requirements. Section 176(c) of the CAA
requires states to establish criteria and procedures to ensure that
Federally supported or funded projects conform to the air quality
planning goals in the applicable SIP. The requirement to determine
conformity applies to transportation plans, programs and projects
developed, funded or approved under title 23 of the United States Code
(U.S.C.) and the Federal Transit Act (transportation conformity) as
well as to all other Federally supported or funded projects (general
conformity). State conformity revisions must be consistent with Federal
conformity regulations relating to consultation, enforcement and
enforceability that the CAA required the EPA to promulgate.
EPA believes it is reasonable to interpret the conformity SIP
requirements as not applying for purposes of evaluating the
redesignation request under section 107(d), because state conformity
rules are still required after redesignation and Federal conformity
rules apply where state rules have not been approved. See, Wall v. EPA,
265 F.3d 426 (6th Cir. 2001), (upholding this interpretation). See
also, 60 FR 62748 (December 7, 1995, Tampa, Florida).
NSR Requirements. EPA has also determined that areas being
redesignated need not comply with the requirement that a NSR program be
approved prior to redesignation, provided that the area demonstrates
maintenance of the standard without a part D NSR program in effect
since PSD requirements will apply after redesignation. The rationale
for this view is described in a memorandum from Mary Nichols, Assistant
Administrator for Air and Radiation, dated October 14, 1994, entitled
``Part D New Source Review (Part D NSR) Requirements for Areas
Requesting Redesignation to Attainment.'' Georgia has demonstrated that
the Murray County Area will be able to maintain the standard without a
part D NSR program in effect, and therefore, Georgia need not have a
fully approved part D NSR program prior to approval of the
redesignation request. Georgia's PSD program will become effective in
the Murray County Area upon redesignation to attainment. See,
rulemakings for Detroit, Michigan (60 FR 12467-12468, March 7, 1995);
Cleveland-Akron-Lorraine, Ohio (61 FR 20458, 20469-70, May 7, 1996);
Louisville, Kentucky (66 FR 53665, October 23, 2001); Grand Rapids,
Michigan (61 FR 31834-31837, June 21, 1996). Thus, the Murray County
Area has satisfied all applicable requirements for purposes of
redesignation under section 110 and part D of the CAA.
b. The Area Has a Fully Approved Applicable SIP Under Section 110(k) of
the CAA
EPA has fully approved the applicable Georgia SIP for the portion
of Murray County affected by today's proposed redesignation, under
section 110(k) of the CAA for all requirements applicable for purposes
of redesignation. EPA may rely on prior SIP approvals in approving a
redesignation request, see Calcagni Memorandum at p. 3; Southwestern
Pennsylvania Growth Alliance v. Browner, 144 F.3d 984, 989-90 (6th Cir.
1998); Wall, 265 F.3d 426, plus any additional measures it may approve
in conjunction with a redesignation action. See, 68 FR 25426 (May 12,
2003) and citations therein. Following passage of the CAA of 1970,
Georgia has adopted and submitted, and EPA has fully approved at
various times, provisions addressing the various 1-hour ozone standard
SIP elements applicable in Murray County, Georgia (See, 70 FR 34660,
June 15, 2005).
As indicated above, EPA believes that the section 110 elements not
connected

[[Page 49685]]

with nonattainment plan submissions and not linked to the area's
nonattainment status are not applicable requirements for purposes of
redesignation. EPA also believes that since the part D requirements
applicable for purposes of redesignation did not become due prior to
submission of the redesignation request, they also are therefore not
applicable requirements for purposes of redesignation.

Criteria (3)--The Air Quality Improvement in the Murray County Area is
Due to Permanent and Enforceable Reductions in Emissions Resulting From
Implementation of the SIP and Applicable Federal Air Pollution Control
Regulations and Other Permanent and Enforceable Reductions

EPA believes that Georgia has demonstrated that the observed air
quality improvement in the Murray County Area is due to permanent and
enforceable reductions in emissions resulting from implementation of
the SIP, Federal measures, and other state-adopted measures.
Additionally, new emissions control programs for fuels and motor
vehicles will help ensure a continued decrease in emissions throughout
the region.

Table 2
------------------------------------------------------------------------
Murray county area emission reductions programs
-------------------------------------------------------------------------
Onboard Refueling Vapor Recovery for Light-Duty Vehicles.
Architectural and Industrial Maintenance Coatings.
Automobile Refinishing.
The National Emission Standards for Hazardous Air Pollutants (NESHAP);
the majority of which are also VOCs.
Phase II Acid Rain Program for NOX.
Tier 2 Motor Vehicle Emissions Standards and Gasoline Sulfur Control
Requirements.
Regional NOX SIP Call.
------------------------------------------------------------------------

Although the NO_X SIP Call is stayed in Georgia, this
regional program implemented in neighboring states, has resulted in
measurable emissions reductions that have lowed pollution transported
into Murray County.

Criteria (4)--The Area Has a Fully Approved Maintenance Plan Pursuant
to Section 175A of the CAA

In its request to redesignate the Murray County Area to attainment,
EPD submitted a SIP revision to provide for the maintenance of the 8-
hour ozone NAAQS for at least 10 years after the effective date of
redesignation to attainment.
a. What is required in a maintenance plan?
Section 175A of the CAA sets forth the elements of a maintenance
plan for areas seeking redesignation from nonattainment to attainment.
Under section 175A, the plan must demonstrate continued attainment of
the applicable NAAQS for at least 10 years after the Administrator
approves a redesignation to attainment. Eight years after the
redesignation, the State of Georgia must submit a revised maintenance
plan which demonstrates that attainment will continue to be maintained
for the 10 years following the initial 10-year period. To address the
possibility of future NAAQS violations, the maintenance plan must
contain such contingency measures, with a schedule for implementation,
as EPA deems necessary to assure prompt correction of any future 8-hour
ozone violations. Section 175A of the CAA sets forth the elements of a
maintenance plan for areas seeking redesignation from nonattainment to
attainment. The Calcagni Memorandum provides additional guidance on the
content of a maintenance plan. The Calcagni Memorandum explains that an
ozone maintenance plan should address five requirements: the attainment
emissions inventory, maintenance demonstration, monitoring,
verification of continued attainment, and a contingency plan. As is
discussed more fully below, Georgia's maintenance plan includes all the
necessary components and is approvable as part of the redesignation
request.
b. Attainment Emissions Inventory
Georgia selected 2004 as ``the attainment year'' for the Murray
County Area for the purposes of demonstrating attainment of the 8-hour
ozone NAAQS. This attainment inventory identifies the level of
emissions in the area, which is sufficient to attain the 8-hour ozone
standard. Georgia began development of this attainment inventory by
first developing a baseline emissions inventory for the Murray County
Area. The year 2002 was chosen as the base year for developing a
comprehensive ozone precursor emissions inventory for which projected
emissions could be developed for 2002, 2009, and 2018. Non-road mobile
emissions estimates were based on EPA's NONROAD2005 model. On-road
mobile source emissions were calculated using EPA's MOBILE6.2 emission
factors model. The 2004 VOCs and NO_X emissions, as well as
the emissions for other years, for the Murray County Area were
developed consistent with EPA guidance, and are summarized in Tables 3
and 4 in the following subsection.
c. Maintenance Demonstration
The June 15, 2007, final submittal includes a maintenance plan for
the Murray County Area. This demonstration:
(i) Shows compliance and maintenance of the 8-hour ozone standard
by providing information to support the demonstration that current and
future emissions of VOCs and NO_X remain at or below
attainment year 2004 emissions levels. The year 2004 was chosen as the
attainment year because it is one of the most recent three years (i.e.,
2002, 2003, and 2004) for which the Murray County Area has clean air
quality data for the 8-hour ozone standard.
(ii) Uses 2004 as the attainment year and includes future emission
inventory projections for 2002, 2009, and 2018.
(iii) Identifies an ``out year'' at least 10 years after the time
necessary for EPA to review and approve the maintenance plan. Per 40
CFR part 93, MVEBs were established for the last year (2018) of the
maintenance plan. See, section VII below.
(iv) Provides the following actual and projected emissions
inventories for the Murray County Area. See, Tables 3 and 4.

[[Page 49686]]

Table 3.--Murray County Area Emissions of VOCs
[Tons per summer day]
------------------------------------------------------------------------
Source category 2002 2009 2018
------------------------------------------------------------------------
Area*............................. 0.0209........ 0.0204 0.0240
Mobile**.......................... 0.0171........ 0.0126 0.0075
Nonroad........................... 0.0050........ 0.0033 0.0031
-------------------------------------
Total......................... 0.0430........ 0.0363 0.0346
Safety Margin***.................. N/A........... 0.0067 0.0084
------------------------------------------------------------------------
*Scaled according to the population of the partial county area.
** Calculated using MOBILE6.2.
*** After assigning 0.0042 TPD of the 2018 VOCs safety margin to the
MVEB, the revised 2018 safety margin will be 0.0042 TPD.

Table 4.--Murray County Area NOX Emissions
[Tons per summer day]
------------------------------------------------------------------------
Source category 2002 2009 2018
------------------------------------------------------------------------
Area*.................................. 0.0070 0.0072 0.0076
Mobile**............................... 0.0156 0.0119 0.0073
Nonroad................................ 0.0054 0.0040 0.0020
--------------------------------
Total.............................. 0.0280 0.0231 0.0169
Safety Margin***....................... N/A 0.0049 0.0111
------------------------------------------------------------------------
*Scaled according to the population of the partial county area.
** Calculated using MOBILE6.2.
*** After assigning 0.0056 TPD of the 2018 NOX safety margin to the
MVEB, the revised 2018 safety margin will be 0.0055 TPD.

A safety margin is the difference between the attainment level of
emissions (from all sources) and the projected level of emissions (from
all sources) in the maintenance plan. The attainment level of emissions
is the level of emissions during one of the years in which the area met
the NAAQS. Georgia has decided to allocate a portion of the available
safety margin to the regional 2018 MVEBs for NO_X and VOCs
for the Murray County Area, and has calculated the safety margin in its
submittal. See, Tables 3 and 4 above. This allocation and the resulting
available safety margin for the Murray County Area are discussed
further in section VII of this proposed rulemaking.
d. Monitoring Network
There is currently one monitor measuring ozone in the Murray County
Area. Murray County has committed in the maintenance plan to continue
operation of this monitor in compliance with 40 CFR part 58, and has
addressed the requirement for monitoring.
e. Verification of Continued Attainment
Georgia has the legal authority to enforce and implement the
requirements of the ozone maintenance plan for the Murray County Area.
This includes the authority to adopt, implement and enforce any
subsequent emissions control contingency measures determined to be
necessary to correct future ozone attainment problems.
Georgia will track the progress of the maintenance plan by
performing future reviews of actual emissions for the Area using the
latest emissions factors, models and methodologies. For these periodic
inventories Georgia will review the assumptions made for the purpose of
the maintenance demonstration concerning projected growth of activity
levels. If any of these assumptions appear to have changed
substantially, Georgia will re-project emissions.
f. Contingency Plan
The contingency plan provisions are designed to promptly correct a
violation of the NAAQS that occurs after redesignation. Section 175A of
the CAA requires that a maintenance plan include such contingency
measures as EPA deems necessary to assure that the state will promptly
correct a violation of the NAAQS that occurs after redesignation. The
maintenance plan should identify the contingency measures to be
adopted, a schedule and procedure for adoption and implementation, and
a time limit for action by the state. A state should also identify
specific indicators to be used to determine when the contingency
measures need to be implemented. The maintenance plan must include a
requirement that a state will implement all measures with respect to
control of the pollutant that were contained in the SIP before
redesignation of the area to attainment in accordance with section 175A(d).
In the June 15, 2007, submittal, Georgia affirms that all programs
instituted by the State and EPA will remain enforceable, and that
sources are prohibited from reducing emissions controls following the
redesignation of the Murray County Area. In the submittal, if there is
a measured violation of the 8-hour ozone NAAQS in the Murray County
Area, contingency measures would be adopted and implemented as
expeditiously as possible, but no later than eighteen to twenty four
months after the triggering event. The proposed schedule for these
actions would be as follows:
• Six months to perform a comprehensive analysis;
• Three months to identify potential sources for reductions;
• Three months to identify applicable control measures;
• Three months to initiate a stakeholder process;
• Three months to draft SIP regulations; and
• Six months to initiate the rulemaking process. This step
would include the time required to hold a public comment period,
hearing, and board adoption, and submit the final plans to EPA. This
process may be initiated simultaneously with drafting the regulations.
Georgia will consider one or more of the following contingency
measures to re-attain the standard.
• RACM for all sources of NO_X

[[Page 49687]]

• RACT for all existing point sources of NO_X
• Expansion of RACM/RACT to area(s) of transport within the State
• Mobile Source Measures
• Additional NO_X reduction measures yet to be identified
EPA has concluded that the maintenance plan adequately addresses
the five basic components of a maintenance plan: attainment inventory,
maintenance demonstration, monitoring network, verification of
continued attainment, and a contingency plan. The maintenance plan SIP
revision submitted by Georgia for the Murray County Area meets the
requirements of section 175A of the CAA and is approvable.

VII. What Are the Proposed Regional MVEBs for the Murray County Area?

Under the CAA, states are required to submit, at various times,
control strategy SIPs and maintenance plans in ozone areas. These
control strategy SIPs (reasonable further progress SIPs and attainment
demonstration SIPs, etc.) and maintenance plans create MVEBs for
criteria pollutants and/or their precursors to address pollution from
cars and trucks. Per 40 CFR part 93, an MVEB is established for the
last year of the maintenance plan. The MVEB is the portion of the total
allowable emissions in the maintenance demonstration that is allocated
to highway and transit vehicle use and emissions. See, 40 CFR 93.101.
The MVEB serves as a ceiling on emissions from an area's planned
transportation system. The MVEB concept is further explained in the
preamble to the November 24, 1993, transportation conformity rule (58
FR 62188). The preamble also describes how to establish the MVEB in the
SIP and revise the MVEB.
Georgia, after interagency consultation with the transportation
partners for the Murray County Area, has elected to develop regional
MVEBs for NO_X and VOCs for this Area. Georgia is developing
these MVEBs, as required, for the last year of its maintenance plan
(2018). The MVEBs reflect the total on-road emissions for 2018, plus an
allocation from the available VOCs and NO_X safety margin.
Under 40 CFR 93.101, the term safety margin is the difference between
the attainment level (from all sources) and the projected level of
emissions (from all sources) in the maintenance plan. The safety margin
can be allocated to the transportation sector; however, the total
emissions must remain below the attainment level. These MVEBs and
allocation from the safety margin were developed in consultation with
the transportation partners and were added to account for uncertainties
in population growth, changes in model vehicle miles traveled (VMT) and
new emission factor models. The regional MVEBs for the Murray County
Area are defined in Table 5 below.

Table 5.--Murray County Area MVEBs
[Tons per day]
------------------------------------------------------------------------
2018*
------------------------------------------------------------------------
NOX.......................................................... 0.0129
VOCs......................................................... 0.0117
------------------------------------------------------------------------
* Includes an allocation for the available NOX and VOCs safety margins.

As mentioned above, Georgia has chosen to allocate a portion of the
available safety margin to the 2018 MVEBs. This allocation is 0.0056
tpd for NO_X and 0.0042 tpd for VOCs. The 2018 regional MVEBs
are derived as follows for NO_X: (0.0073 tpd for total mobile
emissions) + (0.0056 tpd from available safety margin) = 0.0129 tpd;
and for VOCs: (0.0075 tpd for total mobile emissions) + (0.0042 tpd
from available safety margin) = 0.0117 tpd. Thus, the remaining safety
margin in 2018 is 0.0055 tpd for NO_X and 0.0042 tpd for VOCs.
Through this rulemaking, EPA is proposing to approve the 2018
regional MVEBs for NO_X and VOCs for the Murray County Area
because EPA has determined that the Area maintains the 8-hour ozone
standard with the emissions at the levels of the budgets. As mentioned
above, these MVEBs are regional MVEBs for the Murray County Area. Once
the new regional MVEBs for the Murray County Area (the subject of this
rulemaking) are approved or found adequate (whichever is done first),
they must be used for future conformity determinations. As is discussed
in greater detail below, EPA is also announcing the status of its
adequacy determination for the proposed 2018 MVEBs for the Murray
County Area pursuant to 40 CFR 93.118(f)(1).

VIII. What Is the Status of EPA's Adequacy Determination for MVEBs for
the Year 2018 for the Murray County Area?

Under section 176(c) of the CAA, new transportation projects, such
as the construction of new highways, must ``conform'' to (i.e., be
consistent with) the part of the State's air quality plan that
addresses pollution from cars and trucks. ``Conformity'' to the SIP
means that transportation activities will not cause new air quality
violations, worsen existing violations, or delay timely attainment of
the NAAQS. If a transportation plan does not ``conform,'' most new
projects that would expand the capacity of roadways cannot go forward.
Regulations at 40 CFR part 93 set forth EPA policy, criteria, and
procedures for demonstrating and assuring conformity of such
transportation activities to a SIP. The regional emissions analysis is
one, but not the only, requirement for implementing transportation
conformity. Transportation conformity is a requirement for
nonattainment and maintenance areas. Maintenance areas are areas that
were previously nonattainment for a particular NAAQS but have since
been redesignated to attainment with a maintenance plan for that NAAQS.
When reviewing submitted ``control strategy'' SIPs or maintenance
plans containing MVEBs, EPA must affirmatively find the MVEB contained
therein ``adequate'' for use in determining transportation conformity.
Once EPA affirmatively finds the submitted MVEB is adequate for
transportation conformity purposes, that MVEB can be used by state and
Federal agencies in determining whether proposed transportation
projects ``conform'' to the SIP as required by section 176(c) of the
Clean Air Act.
EPA's substantive criteria for determining ``adequacy'' of an MVEB
are set out in 40 CFR 93.118(e)(4). The process for determining
``adequacy'' consists of three basic steps: public notification of a
SIP submission, a public comment period, and EPA's adequacy finding.
This process for determining the adequacy of submitted SIP MVEBs was
initially outlined in EPA's May 14, 1999, guidance, ``Conformity
Guidance on Implementation of March 2, 1999, Conformity Court
Decision.'' This guidance was finalized in the Transportation
Conformity Rule Amendments for the ``New 8-Hour Ozone and PM2.5
National Ambient Air Quality Standards and Miscellaneous Revisions for
Existing Areas; Transportation Conformity Rule Amendments--Response to
Court Decision and Additional Rule Change,'' on July 1, 2004 (69 FR
40004). EPA follows this guidance and rulemaking in making its adequacy
determinations.
Georgia's maintenance plan submission contained new regional MVEBs
for VOCs and NO_X for the Murray County Area for the year
2018. The availability of the Georgia SIP submission with the Murray
County MVEBs was available for public comment on EPA's adequacy Web

[[Page 49688]]

http://www.epa.gov/otaq/stateresources/transconf/currsips.htm. The EPA public
comment period on adequacy of the 2018 regional MVEBs for the Murray
County Area closed on July 23, 2007. EPA did not receive any comments,
or requests for the submittal.
EPA intends to make its determination of the adequacy of the 2018
MVEBs for the Murray County Area for transportation conformity purposes
in the final rulemaking on the redesignation of the Murray County Area.
If EPA finds the 2018 MVEBs adequate and approves these MVEBs in the
final rulemaking action, the new MVEBs must be used for future
transportation conformity determinations. The new 2018 MVEBs, if found
adequate and approved in the final rulemaking, will be effective on the
date of publication of EPA's final rulemaking in the Federal Register.
For required regional emissions analysis years that involve the year
2017 or before, the State will use the interagency consultation group
for this Area to determine the appropriate interim test to use to
demonstrate conformity. For required regional emissions analysis years
that involve 2018 or beyond, the applicable budgets will be the new
2018 MVEBs. The 2018 MVEBs are defined in section VII of this rulemaking.

IX. Proposed Actions on the Redesignation Request and the Maintenance
Plan SIP Revision Including Proposed Approval of the 2018 MVEBs

EPA is proposing to make the determination that the Murray County
Area has met the criteria for redesignation from nonattainment to
attainment for the 8-hour ozone NAAQS. Further, EPA is proposing to
approve Georgia's redesignation request for the Murray County Area.
After evaluating Georgia's SIP submittal requesting redesignation, EPA
has determined that it meets the redesignation criteria set forth in
section 107(d)(3)(E) of the CAA. EPA believes that the redesignation
request and monitoring data demonstrate that the Murray County Area has
attained, and will continue to maintain the 8-hour ozone standard.
EPA is also proposing to approve the June 15, 2007, SIP revision
containing Georgia's 8-hour ozone maintenance plan for the Murray
County Area. The maintenance plan includes regional MVEBs for 2018,
among other requirements. EPA is proposing to approve the 2018 MVEBs
for the Murray County Area, because the maintenance plan demonstrates
that expected emissions for all other source categories will continue
to maintain the 8-hour ozone standard.
Further, as part of today's action, EPA is describing the status of
its adequacy determination for the 2018 MVEBs in accordance with 40 CFR
93.118(f)(1). If transportation conformity is implemented in this Area,
the transportation partners will need to use these new MVEBs pursuant
to 40 CFR 93.104(e) as effectively amended by section 172(c)(2)(E) of
the CAA as added by the Safe, Accountable, Flexible, Efficient
Transportation Equity Act--A Legacy for Users (SAFETEA-LU), which was
signed into law on August 10, 2005.

X. Statutory and Executive Order Reviews

Under Executive Order 12866 (58 FR 51735, October 4, 1993), this
proposed action is not a ``significant regulatory action'' and
therefore is not subject to review by the Office of Management and
Budget. For this reason, this action is also not subject to Executive
Order 13211, ``Actions Concerning Regulations That Significantly Affect
Energy Supply, Distribution, or Use'' (66 FR 28355, May 22, 2001). This
proposed action merely proposes to approve State law as meeting Federal
requirements and imposes no additional requirements beyond those
imposed by State law. Redesignation of an area to attainment under
section 107(d)(3)(e) of the CAA does not impose any new requirements on
small entities. Redesignation is an action that affects the status of a
geographical area and does not impose any new regulatory requirements
on sources. Accordingly, the Administrator certifies that this proposed
rule will not have a significant economic impact on a substantial
number of small entities under the Regulatory Flexibility Act (5 U.S.C.
601 et seq.). Because this rule proposes to approve pre-existing
requirements under state law and does not impose any additional
enforceable duty beyond that required by state law, it 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).
This proposed rule also does not have tribal implications because
it will not have a substantial direct effect on one or more Indian
tribes, on the relationship between the Federal Government and Indian
tribes, or on the distribution of power and responsibilities between
the Federal Government and Indian tribes, as specified by Executive
Order 13175 (59 FR 22951, November 9, 2000). This action also does not
have Federalism implications because it does 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, as specified
in Executive Order 13132 (64 FR 43255, August 10, 1999). This action
merely affects the status of a geographical area, does not impose any
new requirements on sources, or allow a state to avoid adopting or
implementing other requirements and does not alter the relationship or
the distribution of power and responsibilities established in the CAA.
This proposed rule also is not subject to Executive Order 13045
``Protection of Children from Environmental Health Risks and Safety
Risks'' (62 FR 19885, April 23, 1997), because it is not economically
significant and because the Agency does not have reason to believe that
the rule concerns an environmental health risk or safety risk that may
disproportionately affect children.
In reviewing SIP submissions, EPA's role is to approve state
choices, provided that they meet the criteria of the CAA. In this
context, in the absence of a prior existing requirement for the State
to use voluntary consensus standards (VCS), EPA has no authority to
disapprove a SIP submission for failure to use VCS. It would thus be
inconsistent with applicable law for EPA, when it reviews a SIP
submission, to use VCS in place of a SIP submission that otherwise
satisfies the provisions of the CAA. Redesignation is an action that
affects the status of a geographical area but does not impose any new
requirements on sources. Thus, the requirements of section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) do not apply. This proposed rule does not impose an information
collection burden under the provisions of the Paperwork Reduction Act
of 1995 (44 U.S.C. 3501 et seq.).

List of Subjects

40 CFR Part 52

Environmental protection, Air pollution control, Intergovernmental
relations, Nitrogen dioxide, Ozone, Reporting and recordkeeping
requirements, Volatile organic compounds.

40 CFR Part 81

Environmental protection, Air pollution control, National parks,
Wilderness areas.

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

[[Page 49689]]

Dated: August 16, 2007.
J.I. Palmer, Jr.,
Regional Administrator, Region 4.
[FR Doc. E7-17133 Filed 8-28-07; 8:45 am]
BILLING CODE 6560-50-P

Notices For
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2003
2002
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1994

Approval and Promulgation of Implementation Plans and Designations of Areas for Air Quality Planning Purposes; Georgia: Redesignation of the Murray County 8-Hour Ozone Nonattainment Area to Attainment for Ozone

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