What is the life expectancy of an underground oil tank?
While some underground heating oil tanks have lasted longer, a common life expectancy of buried underground oil tanks is approximately 10-15 years. The odds of a leak happening increase, as the tank gets older. Even small, slow leaks can pose significant risk to the environment if they go undiscovered for a long time. The best way to avoid potential problems associated with a leaking tank is to have your tank taken out of the ground and have a new tank installed, either underground or aboveground.