What is secondary containment in UST systems?

Secondary containment in Underground Storage Tank (UST) systems refers to an additional layer of protection that is specifically designed to contain leaks or spills that may occur from the primary tank. This additional layer serves crucial safety and environmental functions by preventing any leaked substances from reaching the surrounding soil or groundwater, thereby minimizing potential contamination and allowing for easier management in the event of a leak.

Secondary containment systems can include double-walled tanks, dikes, or containment basins, which are designed to capture any leaks from the primary containment. This feature is vital in ensuring compliance with environmental regulations and safeguarding public health. The primary purpose of secondary containment is to provide an extra measure of security and to facilitate the quick handling of spills, ensuring that they do not lead to larger environmental disasters.

The other options do not accurately describe the function of secondary containment. Reporting leaks is a necessary practice but is not a description of containment itself. Managing tank pressure is related to the structural integrity of the tank, not its ability to contain leaks. Reducing costs, while an important consideration in overall UST management, is not a specific function of secondary containment.