We have recently completed the manufacture of a bunded fuel tank built to a water board specification.
This consisted of a special highly-resistant paint finish as well as an extended bund space accessible via a lockable hatch, which housed the valves. The tank also had a removable lid for full access to the bunded area as well as top connections to prevent the fuel being stolen once on site. The lid was constructed with a convex roof to aid water run off.
See the photo below of the tank leaving the factory on its way to site.
Call 03300 577 577 or email firstname.lastname@example.org to discuss any tank requirements.