For UST operations, what does the term "secondary containment systems" refer to?

The term "secondary containment systems" refers to backup measures that are designed to prevent spills and leaks from underground storage tanks. These systems are essential for environmental protection, as they are intended to contain any hazardous materials that may escape from the primary containment of the tank itself. This can include materials such as petroleum, chemicals, or other substances that could cause contamination to the surrounding soil and groundwater if spilled.

Secondary containment systems can take various forms, such as double-walled tanks, trenches, or dikes that are positioned around the tanks to catch any leaks or spills. Their implementation is crucial in compliance with environmental regulations and standards aimed at minimizing risks to the environment and public health.

Other options do not align with the definition of secondary containment systems, as they pertain to different aspects of UST operations, such as tracking inventory, employee performance, or providing emergency lighting, which are not directly related to preventing spills.