Document ID: EPA_FRDOC_0001-20390
Agency: epa
Document Type: Notice
Title: Adequacy Status of Motor Vehicle Emissions Budgets for Transportation Conformity Purposes: Knoxville, TN 2006 24-hour PM2.5 Maintenance Plan
Posted Date: 2017-03-10T05:00Z

[Federal Register Volume 82, Number 46 (Friday, March 10, 2017)]
[Notices]
[Page 13347]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-04684]

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ENVIRONMENTAL PROTECTION AGENCY

[EPA-R04-OAR-2016-0782; FRL-9959-77-Region 4]

Adequacy Status of the Knoxville, TN 2006 24-Hour PM2.5 
Maintenance Plan Motor Vehicle Emission Budgets for Transportation 
Conformity Purposes

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of adequacy.

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SUMMARY: The U.S. Environmental Protection Agency (EPA) is notifying 
the public that it has found that the motor vehicle emissions budgets 
(MVEBs) contained in the State Implementation Plan (SIP) revision 
pertaining to the Knoxville, Tennessee 2006 24-hour fine particulate 
matter (PM2.5) nonattainment area adequate for 
transportation conformity purposes. This SIP revision was submitted to 
EPA on December 20, 2016, by the Tennessee Department of Environment 
and Conservation (TDEC) and requests that EPA redesignate the area to 
attainment for the 2006 24-hour PM2.5 national ambient air 
quality standards (NAAQS), and that EPA approve a maintenance plan for 
the continued attainment of the Area. Knoxville's 2006 24-hour 
PM2.5 nonattainment area (hereafter referred to as ``the 
Knoxville Area''), for which MVEBs are established in this notice, is 
comprised of the entire counties of Anderson, Blount, Knox, and Loudon, 
as well as a portion of Roane County. On March 2, 1999, the United 
States Court of Appeals for the District of Columbia Circuit (D.C. 
Circuit) ruled that submitted SIPs cannot be used for transportation 
conformity determinations until EPA has affirmatively found that the 
MVEBs are adequate. As a result of EPA's finding, the Knoxville Area 
must use the MVEBs for future conformity determinations for 2006 24-
hour PM2.5 NAAQS.

DATES: These MVEBs are effective March 27, 2017.

FOR FURTHER INFORMATION CONTACT: Kelly Sheckler, U.S. Environmental 
Protection Agency, Region 4, Air Regulatory Management Section, 61 
Forsyth Street SW., Atlanta, Georgia 30303. Ms. Sheckler can also be 
reached by telephone at (404) 562-9222, or via electronic mail at 
sheckler.kelly@epa.gov. The finding is available at EPA's conformity 
Web site: http://www.epa.gov/otaq/stateresources/transconf/currsips.htm.

SUPPLEMENTARY INFORMATION: This notice is simply an announcement of a 
finding that EPA has already made. EPA, Region 4, sent a letter to TDEC 
on February 15, 2017, stating that the MVEBs identified for Knoxville 
in Tennessee's maintenance SIP revision, submitted on December 20, 
2016, are adequate and must be used for transportation conformity 
determinations in the Knoxville Area.
    EPA posted the availability of the Knoxville Area MVEBs on EPA's 
Web site on December 22, 2016, as part of the adequacy process, for the 
purpose of soliciting comments. The adequacy comment period ran until 
January 23, 2017. During EPA's adequacy comment period, no comments 
were received on the Knoxville Area MVEBs. Through this notice, EPA is 
informing the public that these MVEBs are adequate for transportation 
conformity. This finding has also been announced on EPA's conformity 
Web site: http://www.epa.gov/otaq/stateresources/transconf/pastsips.htm. The adequate MVEBs are provided in Table 1 below:

         Table 1--Knoxville, Tennessee 2006 24-Hour PM2.5 MVEBs
                          [Tons per day or tpd]
------------------------------------------------------------------------
                                                    2014         2028
------------------------------------------------------------------------
PM2.5.........................................         1.22       * 0.67
NOX...........................................        42.73      * 19.65
------------------------------------------------------------------------
* This includes the available safety margin of 0.03 tpd for PM2.5 and
  7.16 for NOX in 2028.

    Transportation conformity is required by section 176(c) of the 
Clean Air Act. EPA's conformity rule, 40 CFR part 93, requires that 
transportation plans, programs, and projects conform to state air 
quality implementation plans and establishes the criteria and 
procedures for determining whether or not they do so. Conformity to a 
SIP means that transportation activities will not produce new air 
quality violations, worsen existing violations, or delay timely 
attainment of the NAAQS.
    The criteria by which EPA determines whether a SIP's MVEBs are 
adequate for transportation conformity purposes are outlined in 40 CFR 
93.118(e)(4). We have also described the process for determining the 
adequacy of submitted SIP budgets in our July 1, 2004 (69 FR 40004), 
final rulemaking entitled, ``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 Changes.'' Please note that an adequacy review is 
separate from EPA's completeness review, and it should not be used to 
prejudge EPA's ultimate approval of Tennessee's 2006 24-hour 
PM2.5 SIP revision for the Knoxville Area. Even if EPA finds 
a budget adequate, the SIP revision could later be disapproved.
    Within 24 months from the effective date of this notice, the 
transportation partners will need to demonstrate conformity to the new 
MVEBs, if the demonstration has not already been made, pursuant to 40 
CFR 93.104(e). See 73 FR 4419 (January 24, 2008).

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

    Dated: February 15, 2017.
Kenneth R. Lapierre,
Acting Regional Administrator, Region 4.
[FR Doc. 2017-04684 Filed 3-9-17; 8:45 am]
 BILLING CODE 6560-50-P