California ICC UST Inspector Practice Exam

What is the correct definition of an UST?

1. Any one or combination of tanks used for the storage of hazardous substances.

2. An underground storage tank, connected piping, and ancillary equipment.

3. A tank that is positioned 10% below the ground surface.

4. A tank that is exempt from regulation under 23 CCR.

The correct answer is: Any one or combination of tanks used for the storage of hazardous substances.

The correct definition of an Underground Storage Tank (UST) encompasses the components that make it a critical element in the management of hazardous substances. A UST refers specifically to a tank that is located underground, along with its connected piping and ancillary equipment, which are all involved in the storage of regulated substances. In the context of USTs, these tanks are typically defined based on their capacity and the nature of the substances they store. While option A discusses tanks used for the storage of hazardous substances, it doesn’t specify the underground aspect or the full system that includes piping and ancillary equipment necessary to classify it thoroughly as a UST. To clarify, a UST will typically include more than just the tank itself; it involves supporting structures and equipment that contribute to the overall function and regulatory considerations for storage of potentially hazardous materials. Understanding this comprehensive overview is critical in assessing safety, environmental impact, and regulatory requirements in the context of UST systems.