The map below shows recent notices. Refer to the Notices & Hearings Archive for a complete list of Notices.
See Definitions of Notice Types and Classifications
Business Registration Classifications (RC)
AOP – Large sources required to register under Title V of the Federal Clean Air Act and receive an Air Operating Permit (AOP).
CLASSIFICATION RC1 – Any source that has an effective Synthetic Minor Order issued pursuant to WAC 173-400-091.
CLASSIFICATION RC2 – Any source with a potential to emit 30 tons or more per year of any combination of pollutants listed in Table 4.4a.
CLASSIFICATION RC3 – Any source with a potential to emit 10 tons or more per year of any combination of pollutants listed in Table 4.4a.
CLASSIFICATION RC4 – Any source, with a potential to emit 5 tons or more per year of any combination of pollutants listed in Table 4.4a.
CLASSIFICATION RC5 – Any source with a potential to emit less than 5 tons per year of any combination of pollutants listed in Table 4.4a.
Definitions of Notice Types
Businesses, industries, institutions, public utilities or municipalities may be required to apply for permits or submit notifications for the following actions:
Air Operating Permit
Air Operating Permits (AOPs) are permits issued to operate sources of air pollution that emit major quantities of air pollution. AOPs must be reissued every 5 years.
Notice of Construction
Notice of Construction (NOC) permits are required prior to the construction, installation, replacement or modification of air pollutant sources, emissions units or air pollution control equipment in ORCAA’s region. NOC permits are also required prior to re-opening or restarting an air pollution source not currently registered with ORCAA or that has been shut down for over a year.
Notice of Intent – Gas Stations
A Notice of Intent (NOI) may be submitted in lieu of an NOC for certain qualifying gas station projects. Complete NOI applications must be submitted 15 days prior to commencing construction.
Notice of Intent – Portable Sources and Nonroad Engines
After initial approval through a Notice of Construction, a Notice of Intent (NOI) must be submitted at least 15 days prior to relocating and operating a temporary portable source to a specific location in ORCAA’s region. Temporary sources may operate at a specific location for no more than 12 consecutive months.
A Notice of Intent (NOI) is also required be submitted prior to operating a nonroad engine with a cumulative maximum rated brake horsepower (BHP) greater than 500 BHP.
Notice of Intent – Small Unit Exemption
Notice of Intent (NOI) for Small Unit Exemptions must be submitted to exempt new or modified equipment or operations that cause air pollution from air permitting on grounds that air pollutant emissions are insignificant.