The Flexible Model of the Containment Sump provides economical and portable spill containment for 275 and 550 gallon tanks. The L-shaped aluminum brackets provide sturdy sidewall support. The brackets can be removed and material folded for compact storage and easy transport. The Flexible Containment Sump offers less expensive shipping, easy storage, and easy assembly. Both sizes are offered with or without an optional 3/4" drain. These Containment Sumps meet SPCC Spill Containment Regs and EPA Container Storage Regulation 40 CFR 264.175.