What is secondary containment in underground storage systems?

Secondary containment refers to a protective barrier or system designed to contain spills, leaks, or overfills from the primary tank or piping. This is a crucial component of underground storage systems, as it plays a vital role in preventing environmental contamination and protecting groundwater from hazardous materials. The primary function of secondary containment is to provide an additional layer of protection, ensuring that any leaked substances are contained and can be managed before they can escape into the environment.

In underground storage tank systems, secondary containment can take various forms, including a double-walled tank where the inner tank holds the product, and the outer layer serves as a containment area. It may also involve a surrounding structure or basin designed to hold potential leaks. This concept adheres to regulatory requirements aimed at minimizing environmental risks associated with underground storage tanks.

Understanding secondary containment helps operators of UST systems appreciate their responsibilities for environmental stewardship and compliance with safety regulations. This awareness is essential not only for preventing hazardous spills but also for effectively managing any incidents that do occur.