Carbon Monoxide (CO) Limited Maintenance Plan

The final "Carbon Monoxide (CO) Limited Maintenance Plan for the Charlotte, Raleigh/Durham & Winston-Salem CO Maintenance Areas" was submitted to the United States Environmental Protection Agency on August 2, 2012. The narrative documents that the Charlotte, Raleigh/Durham & Winston-Salem CO Maintenance areas has fulfilled the requirement of Section 175A of the Federal Clean Air Act as amended. The transmittal letter, narrative, appendices, and on-road mobile sources MOVES files are available through the links found below:

DEQ Submittals:

• Transmittal Letter
• Narrative
• Appendix A - Policy Memorandas
• Appendix B - Emissions Inventory
• Appendix C - Public Notice Report
• MOVES input and output files (.zip)

EPA Actions:

End of Transportation Conformity Requirements

The United States Environmental Protection Agency provided the following letters documenting that the transportation conformity requirements under Section 176(c) of the Federal Clean Air Act, as amended, have ended because the areas have reached the end of the 20-year maintenance plan after which transportation conformity requirements do not apply. Metropolitan Planning Organizations located within these areas may reference the letter for their area to indicate that the conformity requirements of 40 CFR Part 93 no longer apply for the CO NAAQS.

• Mecklenburg County located in the Charlotte Area Letter (requirement ended Sept. 18, 2015)
• Durham and Wake Counties located in the Raleigh-Durham Area Letter (requirement ended Sept. 18, 2015)
• Forsyth County located in the Winston-Salem Area Letter (requirement ended May 23, 2015)

Approval of Limited Maintenance Plans

• Final rule: Approval and Promulgation of Air Quality Implementation Plans; Charlotte, Raleigh/Durham and Winston-Salem Carbon Monoxide Limited Maintenance Plan (78 FR 37118, June 20, 2013)
• Withdrawal of direct final rule: Approval and Promulgation of Air Quality Implementation Plans; Charlotte, Raleigh/Durham and Winston-Salem Carbon Monoxide Limited Maintenance Plan (78 FR 22198, April 15, 2013)
• Direct final rule: Approval and Promulgation of Air Quality Implementation Plans; Charlotte, Raleigh/Durham and Winston-Salem Carbon Monoxide Limited Maintenance Plan (78 FR 12238, February 22, 2013)
• Proposed rule: Approval and Promulgation of Air Quality Implementation Plans; Charlotte, Raleigh/Durham and Winston-Salem Carbon Monoxide Limited Maintenance Plan (78 FR 12267, February 22, 2013)

Please direct any questions or comments concerning this SIP submittal to Randy Strait at the Planning Section Chief.