Which are the two main components of a UST system?

The two main components of a UST system are the storage tank and the associated piping. The storage tank is where the fuel or hazardous substance is held underground, while the piping system is responsible for the transport of the fluid from the tank to the surface, typically connecting to pumps and dispensers. This combination is essential for the UST's functionality, as it directly involves both the containment and delivery of the stored material.

Understanding the significance of the storage tank and associated piping is crucial, as they must be designed and maintained to prevent leaks and ensure safe operation. Regulatory standards often focus on these components to mitigate environmental risks and protect public health. Knowing how these components interact helps ensure compliance with safety regulations and effective management practices. The other components mentioned in the other choices, while relevant to the operation and safety of UST systems, do not represent the core structural components necessary for the system's basic functionality.