Which operator class is described as having primary responsibility for operating and maintaining the UST system?

• A. A
• B. B
• C. C
• D. D

Answer: (A)

The key idea here is who holds the overall authority to run and maintain an underground storage tank (UST) system at a facility. The person with primary responsibility for operating and maintaining the UST system is the one who has the overall control of the UST program at the site. This role includes planning and implementing procedures, supervising maintenance and testing, managing training and records, and ensuring the system stays compliant with regulations. Because this person sets policy, assigns responsibilities, and ensures that day-to-day operations, preventive maintenance, monitoring, and compliance activities are carried out correctly, they carry the broad, central responsibility for the system’s operation and upkeep. The other operator roles are more focused on specific, narrower duties—such as daily operation or on-site monitoring and emergency response—without the overarching authority.