Base provides secondary containment that exceeds EPA requirements. Outdoor Storage Locker holds more than 25% of listed storage capacity. Liquid-tight and weatherproof—contents stay safe from rain, wind and snow. Three-point locking system in door keeps contents secure. All Outdoor Storage Lockers have steel grate floors. All floors remove in sections for easy sump inspection and cleaning. Interior surfaces are protected with a chemical-resistant epoxy coating. Forklift channels allow easy relocation of Outdoor Storage Locker. Includes vents and DOT/placards/NFPA 704M rating signs. Choose from 60-gal., 120-gal. and 160-gal. sump capacity.