Bunding, also called a bund wall, is a constructed retaining wall around storage "where potentially polluting substances are handled, processed or stored, for the purposes of containing any unintended escape of material from that area until such time as a remedial action can be taken."

What is the purpose of a bund wall?

A bunding wall is an enclosure around oil and chemical tanks or drums that provide emergency containment in the event of failure of the tank or drum. A well designed oil and chemical bund will stop hazardous materials leaking to ground or surface water.

What is the difference between dyke wall and bund wall?

Bund wall is a Bunding constructed alongside of storage tanks, where possibly polluting substances are stored and handled. Bund wall also referred as dike wall, but dyke is normally used to describe liquid containing tank facilities which prevent leaks and spillage from tanks and pipes.