What is the primary function of a spill bucket?

The primary function of a spill bucket is to prevent spills from entering the environment. Spill buckets are specifically designed to capture and contain any fuel that might escape during the refueling process or from leaks in underground storage tanks. They serve as a critical secondary containment system that provides an extra layer of protection against environmental contamination.

By ensuring that any spillage is contained within the bucket, they minimize the risk of soil and groundwater contamination, helping to protect public health and the environment. This containment system is essential in promoting safe handling practices for hazardous materials.

The other options illustrate functions that are not primarily associated with spill buckets. Storing hazardous waste or containing large quantities of oil are not intended purposes of a spill bucket, and while drainage may be relevant in some contexts, it does not capture the primary role of preventing spills from affecting the surrounding ecosystem.