We have removed underground storage tanks that were intact but the steel line connecting the tank to the oil burner had leaked. The supply and return piping are made of steel or copper and they will corrode as quickly as the tank if left unprotected in the soil. This step should also be done for the piping. When a UST is removed samples are taken from beneath the tank to test for any fuel leaks. If the tank was inspected but the original piping remains, there is concern it may have been a source of a potential leak. In this case, you should assume the tank was not properly inspected at the time of removal. If a permit is not on file then it means the homeowner did not hire a tank removal contractor or they didn’t hire a contractor that did their due diligence. They should have a permit on file indicating when it was removed and who inspected it. The first step, in this case, is to check with the Fire Department. When a tank was removed but the piping was left in place, it is important to investigate further to ensure a complete and proper disposal was done. When old piping for an underground storage tank (UST) is discovered by a home inspector it raises a flag about if or how the tank was removed. Abandoned underground oil tank piping on basement wall

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