Oil & Gas APENs

Reminder: Environmental Justice Summary Requirement for Air Quality Regulation 3 started July 15, 2023. Learn more.

Reminder: New reasonably available control technology (RACT) requirements start January 2024. Learn more.

Reminder: Permit application rejection criteria - use Form APCD-100 to avoid incomplete permit applications. Learn more.

If your source (equipment) type is not listed below, please use the General Air Pollutant Emission Notice form. A guidance document is available for each form.

Your application will be rejected if it is filled out incorrectly, is missing information, missing required forms, or lacks payment for the filing fee. The Form APCD-100 and all applicable forms on that checklist are required with every application. The re-submittal will require a new filing fee. See our Application Rejection Frequently Asked Questions page for more information.

The following application types are exempted from the requirement to submit the Permit Application/Registration Checklist ( Form APCD-100 ):

• Air Pollutant Emission Notice (APEN) updates only (no changes to permit).
  • Renewal of 5-year APEN term.
  • Update to actual annual emissions, per AQCC Reg. 3, Part A, Section II.C.
  General APEN Form APCD-200

  The is a generic form used to obtain an air permit for a new source of air emissions, modify an existing air permit, request an administrative amendment to an existing air permit, or complete a routine (five-year) Air Pollutant Emission Notice renewal even when there is no change to an existing permit. When an equipment-specific Air Pollutant Emission Notice exists for a given source, it must be used instead of the General Air Pollutant Emission Notice. This form will NOT be accepted for reporting emissions from gas venting activities, including maintenance/blowdown events(use Gas Venting Form APCD-211), or hydrocarbon liquid loading operations (use Hydrocarbon Liquid Loading Operations Form APCD-208).

  Amine sweetening unit APEN Form APCD-206

  Submit this notice to report new or existing natural gas amine sweetening systems, complete a routine (five-year) Air Pollutant Emission Notice renewal, request permit modifications, or report changes in emissions, production or equipment.

  Boiler APEN Form APCD-220

  Submit this notice to r eport a new or existing operation,complete a routine (five-year) APEN renewal,request a permit modification, or report changes in emissions, production or equipment. Please use this form to report boilers, hot oil heaters, process heaters and similar equipment.

  Condensate storage tank(s) APEN Form APCD-205

  Submit this notice to report new or existing condensate storage tanks for both E&P and midstream oil and gas operations.

  Crude oil storage tank(s) APEN Form APCD-210

  Submit this notice to report new or existing crude oil storage tanks for both E&P and midstream oil and gas operations.

  E&P Storage Tank APEN Addendum Form APCD-212 Attach this addendum form to forms APCD 205, 207 or 210 when needed to report additional wells. Facility-Wide Greenhouse Gas Emissions APEN Form APCD-235

  Submit this notice to report facility-wide greenhouse gas emissions. This emission notice is required to be submitted annually on or before December 31 of each year, starting on or before December 31, 2023, for facilities directly emitting CO2e emissions equal to or greater than 25,000 metric tons per year. See Colorado AQCC Regulation No. 3, Part A, II.A.2. for additional information.