What is the primary purpose of secondary containment systems?

The primary purpose of secondary containment systems is to contain spills or leaks from underground storage tanks (USTs). These systems are designed to act as a protective barrier, capturing any potential leaks from the primary containment of the tank, thereby preventing harmful substances from contaminating the surrounding environment, including soil and groundwater. By having a secondary containment system in place, operators can better manage risks associated with fuel storage, ensuring compliance with environmental regulations and promoting public safety.

Options related to storing excess fuel or providing structural support do not align with the fundamental role of secondary containment. Storing excess fuel would imply an additional storage capacity, which does not pertain to the containment of potential leaks. Likewise, while structural support is important in construction, it is not the function of secondary containment systems. Additionally, enhancing fuel efficiency is unrelated, as secondary containment focuses on environmental protection rather than fuel utilization efficiency.