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Summary of Grants Pass Carbon Monoxide (CO) Maintenance Plan


Grants Pass, Oregon, was designated a nonattainment area for carbon monoxide (CO) and classified as moderate upon enactment of the Clean Air Act Amendments in 1990.

Oregon submitted a CO maintenance plan on November 10, 1999, which EPA approved on August 31, 2000 (65 FR 52932 (PDF)(7 pp, 235 K, About PDF)).

On November 5, 1999, Oregon submitted a complete rule renumbering and relabeling package to EPA for approval in the SIP. On January 22, 2003, EPA approved the recodified version of Oregon's rules to remove and replace the outdated numbering system (68 FR 2891 (PDF)(19 pp, 205 K)). The following list refers to the currently approved SIP rules.


The plan relies on control strategies needed to maintain the CO National Ambient Air Quality Standards (NAAQS). The strategy focuses on the Federal Motor Vehicle Emissions Control Program; discontinuation of oxygenated fuel; and Best Available Control Technology for carbon monoxide emissions from major new or expanding industry. 


  • 40 CFR Part 86 - Federal Motor Vehicle Emission Control Program 
  • OAR 340-204-0030 - Designation of Nonattainment Areas
  • OAR 340-204-0040 - Designation of Maintenance Areas
  • OAR 340-204-0090 - Oxygenated Gasoline Control Area - Discontinued for Grants Pass as of October 30, 2000
  • OAR 340-224-0060 - Requirements for Sources in Maintenance Areas

Contingency Measures

  • Reinstatement of Oxygenated Fuels Program
  • Best Available Control Technology will be replaced with requirement to install Lowest Achievable Emission Rate technology.

EPA Effective Date

October 30, 2000