Underground Storage Tank (UST) Removal

The only way to be 100% certain an underground storage tank (UST) has not leaked is to remove it or properly close it in place. Cohesion has removed hundreds of home heating oil USTs; these include USTs in crawl-spaces, basements, adjacent to foundations, beneath foundations, beneath decks, and beneath home additions. Some USTs cannot be removed and must be ‘closed-in-place’ due to site circumstances.

Closing a UST in place does not mean filling it with foam or sand and walking away; you still do not know if it leaked. What can filling the UST with foam, sand, or whatever tell you about the condition of the UST or if it leaked? The UST was in the ground for years, with oil in it. What if the UST was leaking before being foam or sand-filled? What if some oil remained in the UST , and foam or sand was poured in; the oil will still settle in the bottom of the UST and leak out if corrosion causes a hole in the UST . The property owner said they used all the oil or had it pumped out; even if they did, some oil always remains.

To properly close a UST in place, Cohesion cuts a hole in the top of the UST, cleans the interior of the UST, cuts holes in the bottom of the UST to access the soil beneath, and collects soil samples to determine if there was a leak. If the UST did not leak, it can be filled with an inert material. If the UST is in a location where structural support is necessary, a suitably supportive material should be put in the tank.

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