Outofservice Systems And Closure

During temporary closures, owners must continue all usual system operation, maintenance, and leak detection procedures, and must comply with release reporting and cleanup regulations if a leak is suspected or confirmed. Release detection, however, is not required if the UST system is empty.

If a UST system is taken out of service for more than 12 months, it must be permanently closed unless it meets certain performance standards and upgrading requirements. Before a tank is permanently closed, the owner or operator must test for system leaks: if a leak is found, the owner or operator must comply with corrective-action regulations. Once the tank is permanently out of service, it must be emptied, cleaned, and either removed from the ground or filled with an inert solid material.

Closure procedures are available at each tank site or must be made available to the implementing agency upon request.

These closure standards apply to all new and existing UST systems.

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