The Ultra-Containment Berm, Modular Model, also known, affectionately, as the Gorilla Berm has the ability to do something that none of our other Berms can change its dimensions. By using 6-foot long coated, foam blocks for its wall structure, the Gorilla Berm can very quickly and easily be resized to other shapes and sizes to meet other requirements. The foam blocks also allow the Modular Model Containment Berm to be driven in and out of without any manual operation of the walls. The heavy-duty foam compresses to allow trucks and other vehicles to drive into the unit and quickly returns to its normal state when the weight is removed.