When is an owner/operator no longer required to maintain financial responsibility for a UST?

• A. When the UST has been properly closed.
• B. When the site is redeveloped.
• C. When the tanks are empty.
• D. When the state approves closure.

Answer: (A)

Financial responsibility for underground storage tanks stays in place while the tank is in use and continues until the tank is properly closed. The critical moment that ends this obligation is proper closure, meaning the tank is permanently closed or removed in accordance with regulatory procedures and the closure is documented with the regulatory agency. Redeveloping the site or simply having the tanks emptied does not automatically terminate the responsibility, because the risk of leaks or releases can still exist or be associated with the closed tank if closure isn’t completed and documented. State approval of closure is part of the process, but the obligation ends only after proper closure is accomplished and filed. If other USTs remain in service at the site, those obligations continue for those tanks.