Bryan W. Shaw, Ph.D., P.E., Chairman Toby Baker, Commissioner Jon Niennann, Commissioner Richard A. Hyde, P.E., Executive Director 

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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 substitutioninDallas-Fort Worth ozone nonattainment area Dear Mr. Curry: The Nonh Central Texas Council ofGovernments (NCTCOG) began the transportation control measure (TCM) substitutionprocess in early 2016 to remove a high-occupancyvehicle (HOV) lane on US 67 

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### rn 30 (Southern Gateway TCM) and replace it with 35 traffic signalization TCM projectsin the Cities ofAllen, Fairview, and Dallas. The Southern Gateway HOV TCM was originally includedin the 

### Dallas-Fort Worth One-Hour Ozone AttainmentDemonstration State Implementation Plan Revision (Project No. 1999-055-SIP-AI) and then again inthe 

### Dallas-Fort Worth 1997Eight-Hour OzoneAttainmentDemonstration 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 potentialbacksliding issues concerning the TCM tobe substituted, selecting an appropriate substitute TCM, holding a 30-daypublic comment period and public hearing, and establishing concurrence among the convened TCM substitution working group: the NCTCOG, the TCEQ, the Texas Depanment ofTransponation, the United States Environmental ProtectionAgency (EPA), and the Federal Highway Administration. The NCTCOG has successfully completed these steps. This TCM substitutionremoves 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 consultationpartners of the TCM substitution working group was established onMay 23, 2016, demonstrating that this substitution meets the requirements ofClean 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 substitutionwas adoptedby the NCTCOG Regional Transportation Council onMay 12,2016. Once a letter ofconcurrence from EPA, Region 6 isreceived, the TCEQ will submit the substituteTCM and supporting documentation to EPA, Region 6 to update the list ofSIP-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 orjamie.zech@tceq.texas.govwith 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 oaperMr. Ron Curry May 24,2016

cc: Mr. JeffRiley United States Environmental ProtectionAgency 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 ofTransportation Ms. Michelle Conkle Texas Department ofTransportation

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