[Federal Register Volume 73, Number 56 (Friday, March 21, 2008)]
[Notices]
[Pages 15152-15153]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-5791]


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ENVIRONMENTAL PROTECTION AGENCY

[EPA-R06-OAR-2007-0524; FRL-8544-9]


Adequacy Status of Submitted State Implementation Plans for 
Transportation Conformity Purposes: Motor Vehicle Emissions Budgets for 
the Houston-Galveston-Brazoria and the Dallas-Fort Worth 8-Hour Ozone 
Nonattainment Areas

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of adequacy determination.

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SUMMARY: In this notice, EPA is notifying the public that we have found 
the on-road motor vehicle emissions budgets (MVEB) contained in the 
revisions to the Houston-Galveston-Brazoria 8-hour ozone reasonable 
further progress plan and the Dallas-Fort Worth 8-hour ozone attainment 
demonstration plan adequate for transportation conformity purposes. As 
a result of our finding, the budgets from the submitted state 
implementation plan revisions must be used for future conformity 
determinations in the Houston-Galveston-Brazoria and the Dallas-Fort 
Worth areas.

DATES: These budgets are effective April 7, 2008.

FOR FURTHER INFORMATION CONTACT: The essential information in this 
notice will be available at EPA's conformity Web site: http://www.epa.gov/otaq/stateresources/transconf/adequacy.htm. You may also 
contact Mr. Guy Donaldson, Air Planning Section (6PD-L), U.S. EPA 
Region 6, 1445 Ross Avenue, Dallas, Texas 75202-2733, telephone (214) 
665-7242, E-mail address: [email protected].

SUPPLEMENTARY INFORMATION: Throughout this document ``we,'' ``us,'' and 
``our'' refers to EPA. The word ``budget(s)'' refers to the mobile 
source emissions budget for volatile organic compounds (VOCs) and the 
mobile source emissions budget for nitrogen oxides (NOX). 
The word ``SIP'' in this document refers to the State Implementation 
Plan revision submitted by the State of Texas in June, 2007, in partial 
fulfillment of its obligations for the 8-hour ozone National Ambient 
Air Quality Standard.
    In June 2007, we received several SIP revisions from the Texas 
Commission on Environmental Quality (TCEQ). These revisions included 
the Reasonable-Further-Progress (RFP) SIP and the Attainment 
Demonstration SIP for the Dallas-Fort Worth ozone nonattainment area. 
We also received the Reasonable-Further-Progress SIP for the Houston-
Galveston-Brazoria ozone nonattainment area. Each of these submissions 
revised the motor vehicle emissions budgets (MVEB) in these areas. The 
MVEB is the amount of emissions allowed in the state implementation 
plan for on-road motor vehicles; it establishes an emissions ceiling 
for the regional transportation network.
    The Dallas-Fort Worth RFP SIP contains MVEBs for the year 2008. In 
this SIP, the emissions budget for VOCs is 119.81 tons per day (tpd); 
the NOX emissions budget is 249.33 tpd. The Dallas-Fort 
Worth Attainment Demonstration SIP contains MVEBs for the year 2009. In 
the attainment SIP, the emissions budget for VOCs is 99.09 tpd; the 
NOX emissions budget is 186.81 tpd.
    The Houston-Galveston-Brazoria RFP SIP contains MVEBs for the year 
2008. In this SIP, the emissions budget for VOCs is 86.77 tpd; the 
NOX emissions budget is 186.13 tpd.
    On June 28, 2007, the availability of all of these budgets was 
posted on EPA's Web site for the purpose of soliciting public comments. 
The comment period closed on July 30, 2007, and we received no 
comments.
    Today's notice is simply an announcement of a finding that we have 
already made. EPA Region 6 sent a letter to the Texas Commission on 
Environmental Quality on October 24, 2007, finding that the motor 
vehicle emissions budgets for the Houston-Galveston-Brazoria 8-county 
ozone nonattainment area and the Dallas-Fort Worth 9-county ozone 
nonattainment area are adequate and must be used for transportation 
conformity determinations.
    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 SIPs 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 National Ambient Air 
Quality Standards. The criteria by which EPA determines whether a SIP's 
motor vehicle emission budgets are adequate for conformity purposes are 
outlined in 40 CFR 93.118(e)(4).
    Please note that such an adequacy review is separate from EPA's 
completeness review, and it should not be used to prejudge EPA's 
ultimate approval of either of the SIPs. Even if

[[Page 15153]]

we find a budget adequate, either SIP could later be disapproved.

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

    Dated: March 5, 2008.
Richard E. Greene,
Regional Administrator, Region 6.
 [FR Doc. E8-5791 Filed 3-20-08; 8:45 am]
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