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.


Regulation No. 7, Part D

Approved Instrument Monitoring Method (AIMM)

Section I: Non-attainment area condensate tanks  

Section I.H.6: Glycol dehydrators

Section II: Alternative Emissions Control Devices

Section II.C: Storage Tank Emissions Management (STEM)

Section II.H: Well Liquid Unloading

      Section IV: Natural Gas Transmission and Storage Segment

  • COMING FALL 2020

      Section V: Oil and Natural Gas Operations Emissions Inventory 

 Please send emissions inventory questions or comments   to cdphe_apcd_ei@state.co.us    

Leak Detection and Repair (LDAR)



LDAR Annual Reports


Visible Emissions Observations






Regulatory Updates Guidance

2019 Revisions to Regulation No. 3 and 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. 



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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