Environmental · Defined
Underground storage tank (UST)
A tank system located wholly or partly below ground, often used to store petroleum or other substances. Regulatory definitions determine which systems are covered.
Why it matters
Tank presence, release history, and closure status are separate issues. A removed tank can still warrant investigation if surrounding contamination or documentation gaps remain.
In practice
A project example
An old plan depicts a fuel tank that is absent from current records, prompting a request for removal and closure documentation.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.