UST Operator Training

UST Operator Training is a requirement designed to ensure proper knowledge regarding operating and maintaining UST systems. Since its implementation in 2009, UST Operator Training has resulted in improved compliance rates and a reduction in petroleum releases.

All regulated UST systems must have Class A, Class B and Class C Operators. Click on the arrows below to learn more about the requirements for each operator class.




Class A Operator Requirements
  • Holds the primary responsibility for operating and maintaining the UST system.
  • Manages resources and personnel to maintain compliance with regulatory requirements.
  • Should be, or be employed directly by, the tank owner/operator, not a third-party contractor.




Class B Operator Requirements
  • Implements day-to-day aspects of operating, maintaining and record-keeping for USTs at one or more facilities.
  • Can be employed directly by the tank owner/operator or by a third party contractor.




Class C Operator Requirements
  • First line of response to release events, such as alarms or other indications of emergencies caused by spills/releases from UST systems.
  • Notifies the Class A and B Operator(s) and appropriate emergency responders when necessary.
  • At least one Class C Operator must be present during operating hours at attended facilities.



  • All owners/operators must submit a completed UST A/B Operator Designation form to OPS within 30 days of changing either a Class A or Class B Operator.
  • A tank owner/operator can choose to have different people fulfil each of the operator classes, or the tank owner/operator may choose to have the same person serve as the Class A, Class B and Class C Operator as long as the person meets the specific requirements of each class.
  • In order to provide flexibility, OPS allows a tank owner/operator to hire an independent contractor to serve as the facility‚ Class B Operator, if desired. Contracting with a Class B Operator in this fashion can allow more time for a tank owner/operator to focus on other business management matters. However, OPS strongly recommends clear establishment of specific responsibilities to be handled by contracted Class B Operators, given that the tank owner/operator is ultimately responsible for operating in compliance with the Colorado Petroleum Storage Tank Regulations.
  • Certification as a Class A or Class B Operator can be achieved by passing classroom or online training offered by an OPS-approved trainer or by passing the International Code Council‚ Colorado UST System Class A or B Operator exam.
  • Certified Class A or Class B Operators can train their company‚ Class C Operators. Tank owners/operators must keep copies of each Class C Operator‚ training certificate at the facility.
  • There are no continuing education or retraining requirements unless a facility is significantly out of compliance. 
  • If a facility is significantly out of compliance, retraining of the A and/or B Operator may be required.