Spill containment doesn't have to take up a lot of floor space. The Ultra-Drum Tray is designed for one of two things: spill containment for smaller containers (20 gal or smaller) or a ''good housekeeping" and safety measure for 55-gal drums. The 21.1-gal capacity is not enough to meet the EPA or SPCC spill containment regulations for 55-gal drums, but it is perfect for capturing those nuisance drips and spill that can occur in day-to-day operations. The optional grating keeps containers elevated above any spills.