EPA Region 10 serves Alaska, Idaho, Oregon, Washington, and 271 native tribes.

• Types of permits issued
• Source categories eligible for general permit or permit by rule
• Current permits
• Technical memoranda

Types of Permits Issued

• PSD – Prevention of Significant Deterioration major source construction permits in "attainment areas."
• nNSR – Major source construction permits in "nonattainment areas."
• mNSR – Minor source construction permits in Indian Country.
• Syn Minor – Synthetic minor source permits in Indian Country.
• GP-XXXX – General permits or permits by rule in Indian Country identified by one of eleven different source categories (e.g. GP-HMAP is a general permit for a hot mix asphalt plant).
• Title V – Major source Part 71 operating permits (only in Indian Country in Idaho, Oregon, and Washington).
• Non-Title V – Federal Air Rules for Reservations (FARR) operating permits (only in Indian Country in Idaho, Oregon, and Washington).
• OCS – Outer Continental Shelf construction and operating permits (except off the North Slope of Alaska).

Source Categories Eligible for General Permit or Permit by Rule

General permits or permits by rule are now available at EPA's Tribal Minor New Source Review web page for the following source categories:

• HMA: Hot mix asphalt plants
• SQCS: Stone quarrying, crushing, and screening facilities
• GDF: Gasoline dispensing facilities
• PDC: Petroleum dry cleaners
• ABRMSCO: Auto body repair and miscellaneous surface coating operations
• CBP: Concrete batch plants
• BEE: Boilers and emergency engines
• SSIE: Stationary spark ignition engines
• SCIE: Stationary compression ignition engines
• GAPO: Graphic arts and printing operations
• SF: Sawmill facilities

Current Permits

Technical Memoranda

Listed below are the technical memoranda referenced in some permits issued by EPA Region 10.

Biomass boilers »

• HAP Potential to Emit Emission Factors for Biomass Boilers Located in Pacific Northwest Indian Country
• Non-HAP Potential to Emit Emission Factors for Biomass Boilers Located in Pacific Northwest Indian Country
• Procedure to Determine a Biomass Boiler’s Fuel-Heat-Input-To-Steam-Output Ratio

Sawmills »

• Particulate Matter Potential to Emit Emission Factors for Activities at Sawmills, Excluding Boilers, Located in Pacific Northwest Indian Country
• EPA Region 10 HAP and VOC Emission Factors for Lumber Drying

Plywood mills »

• EPA Region 10 HAP and VOC Emission Factors for Veneer Dryer Employing Indirect Steam Heat without Air Pollution Controls