Hazardous Waste Program

Underground Storage Tanks - Closure

Underground storage tanks being removed from the ground.

Closure means to permanently remove the Underground Storage Tank, or UST, from the ground or close it in place. Both methods require prior Missouri Department of Natural Resources notification. The department has established guidelines to be followed. The Closure process occurs when an owner or operator removes a UST system, including piping. The procedures involved with the closure process include:

USTs that are out of use continue to be assessed registration fees until tanks are removed or permanently closed. A site assessment must be conducted within 12 months of taking a tank out of use. Tanks that remain out of use must be permanently closed within five years of taking the tank out of use.

Closure Forms

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