Specialty Tanks






to view how many gallons are lost in a day or month, move your mouse over this picture

4.3.1   Double-wall UST Systems


These systems are equipped with double-wall tanks or double-wall piping, or both.  


Double-wall UST Systems must have a means for detecting a release from the inner wall of the double-wall tank or piping.   The leak detection method must be able to detect a leak rate of 0.2 gallons per hour (GPH) (place the mouse over the gas tank image).


There are four primary methods for detecting a leak:

1.           Brine solution

2.           Vacuum

3.           Pressure

4.           Dry