If water needs to be pumped out of a tank, be sure that the contents are properly collected, contained, and disposed of, not pumped onto the ground. Have a heating repair professional inspect your heating system on a regular basis. Sudden changes in oil consumption or the furnace shutting off may indicate a leak or other problem. Do not wait for your tank to leak to inspect, protect, or replace it. Since you cannot see the condition of underground tanks, you are usually not aware of developing problems.
Underground tanks are especially susceptible to problems because of their corrosive environment.
The rate of corrosion varies due to a number of site conditions and type of tank construction. Underground tanks and piping require more diligent professional attention. Usually, the small 275 gallon aboveground tanks should be placed inside or in a sheltered area. They corrode at an accelerated rate and may topple over due to severe weather conditions. You can also surround the pad with a row of mortared cinder blocks so that if any oil leaks from your tank, it will be temporarily contained for an easier cleanup.