This forkliftable containment unit is designed for the widely used 550-gal. skid tank to keep oils and other hazardous liquids safely stored above the ground. The one-piece Poly-Tank Containment Unit/550™ won't rust or corrode and featurse a large, 550-gal. sump. Ideal for construction sites, marine and farm use, the roomy interior of this containment unit provides space for hoses and related equipment. Optional bulkhead fittings make pumping and draining simple. Optional poly tarp keeps rainwater and debris out of the sump. Meets EPA 40, SPCC and NPDES regulations. Tank not included.