What is the primary function of secondary containment devices in underground storage systems?

The primary function of secondary containment devices in underground storage systems is to minimize environmental impact during leaks. These devices serve as an additional layer of protection by capturing leaked substances from the primary storage tank, thus preventing them from reaching the soil, groundwater, and surrounding environments. This is critical for reducing the risk of contamination and protecting public health as well as natural resources.

Secondary containment systems can include double-walled tanks, secondary liners, and containment sumps that effectively contain any accidental releases. By ensuring that any leaks are contained within the secondary barrier, these systems provide a crucial safeguard against the potential hazards posed by hazardous materials stored in underground tanks. This function aligns directly with environmental regulations and standards aimed at preserving ecosystem integrity and mitigating pollution risks.