What common risk is mitigated by using double-walled tanks?

Using double-walled tanks significantly reduces the risk of potential leaks and spills. The design of these tanks includes an inner container that holds the fuel and an outer container that acts as a secondary barrier. This configuration helps to contain any leaks that might occur from the inner tank, thus preventing the release of heating oil into the environment.

This containment feature is crucial for environmental protection and compliance with regulations, as it minimizes the risk of soil and water contamination that can arise from spills. Moreover, it provides an additional safety layer for operators and surrounding communities, addressing both environmental and public health concerns.

In contrast, while the other options are valid considerations in tank management, they do not directly relate to the primary safety benefit provided by double-walled tank construction.