Should the fill line be removed when decommissioning an old oil tank

furnaceheating

So, I have a contractor decommissioning my old 650-gallon oil tank. There is a 3" metal tube coming out of the ground from the tank that is what I believe to be the receptacle used to fill the tank when it was still active.

My question here is, for the $1900 that I am paying to have this tank decommissioned, should I expect them to saw off and hide the filler tube that pokes up 6 inches out of the ground?

Best Answer

Whether or not they remove the fill line, depends on how the tank is decommissioned. There are three ways an abandoned tank can be handled, as explained in this PDF

The 1997 Uniform Fire Code, adapted by WAC 51- 44, requires that heating oil tanks out of service for a period of one year shall be decommissioned by using one of the following processes.

  1. Removal from the ground and restoration of the site in an approved manner.
  2. Abandonment in place by filling the tank completely with an approved, inert solid material.
  3. Tanks of 1,100 gallons or less may be left empty provided they are first pumped and cleaned, and have the fill line capped or plugged, below grade, to prevent refilling of the tank. (NOTE: Some local juisdictions do not permit this “clean and cap” method. Check local requirements before beginning any decommissioning process.)

In the first method, the tank is completely removed, so the fill line will also be removed. With the second method, the fill line may be left behind. In the third case, the fill line should be cut below grade before it's capped. So the fill line will still be there, but it will be at or below the level of the ground.

The document also has a good list of questions to ask the contractor.

Some important questions to ask contractors:

• Are they experienced? Can they provide the names and telephone numbers of current or recent customers as references?

• Do they have environmental pollution liability coverage?

• Do they collect soil samples?

• Which laboratory do they use for the analyses?

• Where will the tank, oil, and contaminated water from rinsing out the tank be disposed? Is that disposal site insured?

• What documentation, labeling, and other paperwork are provided? You should receive documentation of disposal of the tank, a copy of the lab results, documentation that the soil samples were handled properly, a copy of any permits required, and documentation of the disposal and/or treatment of any wastes.

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