A self bunded tank is a tank within a tank - it is simply nested within a tank of 110% capacity of the original. This is an optimal design to catch any leakages, and reduces the risk of contamination and environmental impact. All highly desirable features for small scale, portable tank systems.

1) Size: The capacity of your tank depends on weekly consumption, geographical location, buying power and fuel supplier drop volume ability.
2) Type: Self-bunded is a preferred design, particularly for small and portable tank options. At a certain capacity, though, we move to a double-walled design - two steel walls welded together - with independent bunded areas.