Oil & gas compliance and recordkeeping

Oil & Gas


Storage tank and vapor control system guidelines

Guidelines for design, operation, and maintenance of vapor control systems at oil and gas facilities.

Oil & gas operating and maintenance plans

Forms and guidance for O&M plans for equipment at oil & gas facilities.

Midstream GHG Reductions

Each oil and gas midstream segment owner or operator must participate in this program to develop a plan to reduce GHG emissions from midstream fuel combustion equipment.  (Reg. 7, Part B, Section VII).  Rulemaking in late 2024.

Regulation No. 7


Approved Instrument Monitoring Method (AIMM)
Part B, Section I.F.3: Storage Tank Control Strategy 
Part B, Section I.H.6: Glycol dehydrators
Part B, Section II.: Control Equipment
Part B, Section II.B.2.h: ECD Performance Testing
Part B, Section II.C: Storage Tank Emissions Management (STEM)
Part B, Section II.E.4.f.: Alternative inspection frequency
Part B, Section II.G: Well Liquid Unloading, Downhole Well Maintenance, and Well Plugging Activities
Part BSection IV: Natural Gas Transmission and Storage Segment
Part BSection V: Oil and Natural Gas Annual Emissions Inventory Reporting
Part B, Section VI: Oil and Natural Gas Pre-Production and Early Production Operations
Part B, Section VII:  GHGs from Midstream Fuel Combustion Equipment
Part B, Section VIII.E:   Upstream Intensity Operator Greenhouse Gas Intensity Plans

Reporters are required to email their Plan to cdphe_apcd_ei@state.co.us by August 31, 2023.   Any questions may be sent to cdphe_apcd_ei@state.co.us or Keegan.Conley@state.co.us.

Part B, Section III.C.4 - Pneumatics Reporting


Regulation No. 26, Part B, Section I.D.5.b - Large Engines

Leak Detection and Repair (LDAR)



  • PS Memo 14-04 LDAR and open-ended valves and line requirements.
  • March 2021 LDAR Training slides.

LDAR Annual Reports


Visible Emissions Observations



Regulatory Updates Guidance


2021 Revisions to Regulation No. 7 and Regulation No. 22


2020 Revisions to Regulation No. 7


2017 Revisions to Regulation No. 7


2014 Changes to Regulation Nos. 3, 6, and 7


Optical Gas Imaging Infrared (IR) Camera Inspection Program

IR camera inpection pilot project assessment (July 2016)
Two-year project using optical gas imaging infrared cameras to identify and address sources of emission leaks and venting. 

IR camera inspection program updated assessment (March 2019)


Noble Energy consent decree

Settlement between Noble Energy, the Colorado Department of Public Health and Environment and the U.S. Environmental Protection Agency, effective June 2, 2015.

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