Unique "dual enclosure" offers significant ergonomic and convenience benefits - drums are easily accessed from either side. Roll-top covers can be easily lifted from waist height to access drum tops - no need to reach near ground level. Low profile (8 3/4") containment pallet positions drum-tops at a safe, convenient level to pour wastes into funnels or to use drum pumps. Forkliftable, lockable, all-polyethylene construction will not rust or corrode. Helps meet new Stormwater Management Regulations - NPDES, 40 CFR 122.26.