Fuel Tank Decommissioning
Homeowners who have or plan to convert to natural gas or to an aboveground Storage Tank (AST) may opt to have their buried heating oil tanks decommissioned in place with an inert material such as gravel or a slurry mix as per acceptable construction code, which is permitted by the ADEC. The other option homeowners have is the complete removal of the old tank altogether.
If your buried fuel tank is older then 25 years, it would be very wise to consider having tank inspected for cleanliness and tightness (integrity). It is far less expensive to remove a questionable tank and replace than to have a very costly clean-up later.
To properly decommissioning a buried fuel oil tank, all fuel is removed then tank is cleaned of all sludge and debris before interior is washed with a Microbial cleaning agent that encapsulates and eliminates all residual fuel, VOC’s and LEL’s. Only then will an opening be cut into top of tank for further inspection and documentation. When documentation is complete, fuel tank can then be removed.
Should you choose to decommission tank in the ground, cleaning as stated above will be performed, then p-gravel or slurry will be backfilled into tank cavity, steel cover replaced that was removed, fill and vent pipes removed and copper feed tubes removed. All soil will be replaced on top of tank to ensure proper drainage.
Follow this link to: ADEC Residential Tank Information and Helpful Brochures