Self Inspection Checklist for Underground Home Heating Oil Tanks If you answer “YES” to any of the following questions, call your oil burner technician for a more detailed inspection and corrective measures. (Of course, the best thing to do is to remove your underground oil tank and switch to aboveground storage.)
Are you using more fuel than normal?
Is your tank taking on water— a rise in water level greater than 1/2″ for an 8 to 12 hour period? (Your oil burner technician can check for water or provide you with water finding paste so you can check yourself.)
Are there signs of oil sheens in nearby streams, wetlands, or drainage ditches?
Are there signs of distressed (withered) vegetation over or down slope of the tank?
Is the tank vent clogged or restricted because of ice, snow, or insect nests? (Screened vents can be used to prevent insect nest problems.)
Is the overfill whistle silent when the tank is being filled? (Ask your delivery person.)
Are there signs of spills around the fill pipe or the vent pipe?