What is the objective of secondary containment for USTs?

The objective of secondary containment for underground storage tanks (USTs) is to prevent leaks from contaminating the surrounding environment. Secondary containment systems are designed to catch and hold any fuel or hazardous material that might escape from the primary containment (the tank itself). This is crucial for environmental protection, as leaks can lead to soil and groundwater contamination, posing risks to human health and ecosystems.

Secondary containment can take various forms, such as double-walled tanks, containment berms, or secondary liners, all of which serve to provide a barrier that contains any potential spills or leaks. Ensuring that these systems are in place is a key regulatory requirement and is essential for compliance with environmental protection standards.

The other options do not align with the primary purpose of secondary containment. Increasing tank capacity or providing supplementary storage for excess fuel does not address the environmental protection angle. Meanwhile, ensuring a faster refuel process is also unrelated to the fundamental goal of secondary containment, which centers on environmental safety and leak prevention.