You must notify the agency if you are in control or management of an underground, partially underground or fully mounded tank that was used to store flammable gases/liquids, which:
- has not been used in the past 2 years
- has ceased operation and will not be used to store flammable gases/liquids in the future.
The tank/storage system must be either be removed, or if removal is not reasonably practicable, made safe with no risk to health and safety. It may be impractical to remove a tank due to the proximity to surrounding structures or there is pipe work above an underground tank.
