Several warning signs could reveal a leak in an underground storage tank. If any of the following are observed, call in an expert to take a look at the existing tanks.
Fuel use is higher than normal.
Tank is taking on water. Oil sheen appears in nearby streams, wetlands or drainage ditches. Distressed, or withered, vegetation appears over the down slope of the tank. Signs of spills occur around the fill pipe or vent pipe. This could involve just closing a valve and using absorbent materials to limit the spread and assist in the pickup.