Greensboro / Winston-Salem / High Point (Triad) Area (Ozone)

Supplement to the Maintenance Plan for 1997 8-hour Ozone - April 2013

The final "Supplement to the Maintenance Plan for the 1997 8-hour Ozone Standard for the Greensboro/Winston-Salem/High Point, NC (Triad) Maintenance Area" was submitted to the United States Environmental Protection Agency (USEPA) on April 12, 2013. In this supplement, the USEPA is requested to relax the current 7.8 pounds per square inch (psi) Reid Vapor Pressure (RVP) requirement for four Triad counties: Davidson, Davie, Forsyth, and Guilford. Each county is subject to the summertime gasoline volatility standard contained in 40 CFR 80.27(a)(2). Approval of this request will enable 9.0 psi gasoline to be distributed in the entire Triad area throughout the year. The technical demonstration shows that relaxation of the RVP standard in the Triad maintenance area does not interfere with the attainment of National Ambient Air Quality Standards (NAAQS).

The transmittal letter, narrative, and appendices are available through the links found below:

DEQ Submittals:

EPA Actions:

  • Final Rule: Approval and Promulgation of Implementation Plans; North Carolina: Non Interference Demonstration for Removal of Federal Low Reid Vapor Pressure Requirement for the Greensboro/Winston-Salem/High Point Area (79 FR 4082, January 24, 2014)
  • Proposed Rule: Approval and Promulgation of Implementation Plans; North Carolina: Non Interference Demonstration for Removal of Federal Low Reid Vapor Pressure Requirement for the Greensboro/Winston-Salem/High Point Area (78 FR 70516, November 26, 2013)

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

Maintenance Plan for 1997 8-hour Ozone - April 2011

The final "Section 110(a)(1) Maintenance Plan for the 1997 8-Hour Ozone Standard for the Greensboro/Winston-Salem/High Point 1-Hour Ozone Maintenance Area" State Implementation Plan (SIP) package was submitted to the United States Environmental Protection Agency (USEPA) on April 13, 2011. The transmittal letter, narrative, and appendices are available through the links found below.

DEQ Submittals:

EPA Actions:

  • Direct Final Rule: Approval and Promulgation of Implementation Plans; North Carolina: Approval of Section 110(a)(1) Maintenance Plan for the Greensboro Winston-Salem-High Point 1-Hour Ozone Maintenance Area to Maintain the 1997 8-Hour Ozone Standards (77 FR 3611, January 25, 2012)
  • Proposed Rule: Approval and Promulgation of Implementation Plans; North Carolina: Approval of Section 110(a)(1) Maintenance Plan for the Greensboro Winston-Salem-High Point 1-Hour Ozone Maintenance Area to Maintain the 1997 8-Hour Ozone Standards (77 FR 3719, January 25, 2012)

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

Supplement to the 1-Hour Ozone Plan - February 2008

The "Supplement to the 1-Hour Ozone Maintenance Plan Update for the Raleigh/Durham & Greensboro/Winston-Salem/High Point 1-Hour Ozone Maintenance Areas" narrative is posted.

A request for public comments and a request for public hearing notice was open through January 25, 2008. There were not any comments received or any requests for public hearing. Therefore, a public hearing was not scheduled or held regarding this "Supplement Package."

The final Supplement Package was submitted to the United States Environmental Protection Agency on February 4, 2008.

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