What is the significance of the “double-wall” tank design?

The significance of the "double-wall" tank design lies in its ability to provide extra containment to prevent leaks. This design features an inner tank that holds the fuel and an outer tank that serves as a secondary barrier. This dual-layer system is critical for environmental protection and safety, as it minimizes the risk of fuel spillage or contamination, which can occur due to tank failure or corrosion over time. The presence of this additional containment layer ensures that, in the event of a leak in the inner tank, the outer tank can capture and contain that fuel, preventing it from escaping into the surrounding environment. This feature is particularly important in compliance with regulatory standards aimed at protecting groundwater and other natural resources from potential contaminants. Additionally, the design instills greater confidence in the overall integrity of the fuel-storage facility.