If your home was built before the mid-1960s, there's a good chance it has an underground storage tank for the heating oil used as the fuel for the furnace. This heating oil was usually stored in underground storage tanks (USTs) near the homes. Oil trucks would come to the homes and top off the USTs periodically during the winter months.
The Problem: Tanks Can Corrode & Leak Over Time
Over time, people switched to above-ground tanks or to electric furnaces or furnaces powered by natural gas. But the underground tanks still sit on the properties and may still have some oil in them. So what is the problem? Well, the tanks are made primarily of steel, which will corrode after about 20 or 30 years of use. Holes develop in the tanks, and the oil leaks out…
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