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The OPS Petroleum Program regulates petroleum storage facilities with USTs (underground storage tanks) that hold 110 gallons or more and ASTs (aboveground storage tanks) that hold between 660 and 40,000 gallons. We also enforce NFPA (National Fire Protection Association) codes for ASTs that hold between 60 and 660 gallons or 40,000+ gallons when they are installed for retail and non-retail fueling.

For information pertaining to items that do not fall under our jurisdiction, you may contact the Colorado Department of Public Health and Environment at 303-692-3331 or the Colorado Oil and Gas Conservation Commission at 303-894-2100.

Tank Compliance

Find everything you wanted to know about petroleum storage tank compliance but didn't know who to ask by looking at the AST (aboveground storage tank) and UST (underground storage tank) Compliance web pages.

Liquefied and Compressed Gases

Liquefied and Compressed Gases inspectors conduct inspections at facilities that sell Liquefied Petroleum Gas (LPG), Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG).

Weights and Measures

Weights and Measures includes the Petroleum Laboratory, Registered Service Agencies (RSAs), Retail Motor Fuel Devices (RMFDs) and Vehicle Tank Meters (VTMs).


Remediation involves oversight of the assessment and remediation of petroleum releases at over 600 contaminated sites within Colorado. The Remediation goal is to identify, assess, and clean up contaminated sites while protecting human health and the environment.

Petroleum Storage Tank Fund

Petroleum Storage Tank Fund (the Fund) staff receive and process applications to the Fund for reimbursement of costs related to assessment and cleanup of petroleum-contaminated sites.