This Ultra Containment Berm features an economical design that offers cost savings and secure containment. This collapsible wall model is made from a rugged PVC sidewall assembly for sidewall support. Simply swivel the base feet of the PVC support. This lowers and raises the sidewall easily and quickly. These meet EPA Container Storage Regulations - 40 CFR 264.175 with Collapsible Wall Model Containment Berms.