Bryan W. Shaw, Ph.D., P.E., Chairman 

Toby Baker, Commissioner 

Jon Niennann, Commissioner 

Richard A. Hyde, P.E., Executive Director 

HECC!·/C:LJ - GPDL ~.!''PI :'~IJ'~jliG SEC :1''\ ! \ . 11.,... .. ~ l i l .. t • 'i ..... • 

16 NAY 31 PM 5: 34 

TEXAS COMMISSION ON ENVIRONMENTAL QUALITY 

Protecting Texas lTy Reducing and Preventing Pollution 

Mr. Ron Curry 

EPA Regional Administrator, Region 6 

1445 Ross Avenue, Suite 1200, MC#l101A 

Dallas, Texas 75202 

May 24, 2016 

RE: Transportation control measure substitution in Dallas-Fort Worth ozone nonattainment area 

Dear Mr. Curry: 

The Nonh Central Texas Council of Governments (NCTCOG) began the transportation control 

measure (TCM) substitution process in early 2016 to remove a high-occupancy vehicle (HOV) lane on 

US 67 /lli 35 between rn 20 and rn 30 (Southern Gateway TCM) and replace it with 35 traffic 

signalization TCM projects in the Cities of Allen, Fairview, and Dallas. The Southern Gateway HOV 

TCM was originally included in the Dallas-Fort Worth One-Hour Ozone Attainment Demonstration 

State Implementation Plan Revision (Project No. 1999-055-SIP-AI) and then again in the Dallas-Fort 

Worth 1997 Eight-Hour Ozone Attainment Demonstration State Implementation Plan Revision (Project 

No. 2006-013-SIP-NR). 

The TCM substitution process includes confirming with the Texas Commission on Environmental 

Quality (TCEQ) that there are no potential backsliding issues concerning the TCM to be substituted, 

selecting an appropriate substitute TCM, holding a 30-day public comment period and public hearing, 

and establishing concurrence among the convened TCM substitution working group: the NCTCOG, the 

TCEQ, the Texas Depanment of Transponation, the United States Environmental Protection Agency 

(EPA), and the Federal Highway Administration. The NCTCOG has successfully completed these steps. 

This TCM substitution removes the Southern Gateway HOV TCM and replaces its assodated 

emissions reductions (nitrogen oxides and volatile organic compounds) with those from the traffic 

signalization TCM projects referenced above. Verbal concurrence among the consultation partners of 

the TCM substitution working group was established on May 23, 2016, demonstrating that this 

substitution meets the requirements of Clean Air Act, §176(c)(8)(A)(Hv). This letter confirms the 

TCEQ's concurrence and complies with the requirement of CAA, §176(c)(8)(A)(v). 

The TCM substitution was adopted by the NCTCOG Regional Transportation Council on May 12,2016. 

Once a letter of concurrence from EPA, Region 6 is received, the TCEQ will submit the substitute TCM 

and supporting documentation to EPA, Region 6 to update the list of SIP-approved TCMs. 

We look forward to working with the EPA and the NCTCOG to complete this TCM substitution. Please 

contact Jamie Zech at 512-239-3935 or jamie.zech@tceq.texas.gov with questions. 

Sincerely, 

David Brymer, Director 

Air Quality Division 

DB/jz 

P.O. Box 13087 • Texas 78711-3087 • 512-239-1000 • 

How is our customer service? tceq.texas.gov/customersurvey 

printed on recvded oaper 
Mr. Ron Curry 

May 24,2016 

cc: Mr. Jeff Riley 

United States Environmental Protection Agency 

Mr. Michael Morris, P.E. 

North Central Texas Council of Governments 

Mr. Chris Klaus 

North Central Texas Council of Governments 

Mr. Jose Campos 

Federal Highway Administration 

Ms. Barbara Maley 

Federal Highway Administration 

Ms. Jackie Ploch 

Texas Department of Transportation 

Ms. Michelle Conkle 

Texas Department of Transportation 

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