Home heating oil is typically stored in either an AST or UST system. When heating oil is no longer used on a property, the associated storage tank must be "taken out of service and properly closed" within one year. This means removal of excess heating oil, proper cleaning of the tank to remove any residue, and proper off-site disposal of the tank system. If the heating oil was stored in a UST system, the tank is either removed from the ground or filled with an inert material (e.g., flowable fill) if it cannot be safely removed from the ground.
Further information regarding heating oil tanks has been provided by the MDEQ Regulatory Guide to Home Heating Oil Tanks. R&W routinely assists home owners and commercial operations with the proper closure of heating oil tanks.