With the Ultra Hardtop Plus, multiple drums can be safely stored outdoors. The unit features separate, lockable compartments with a unique “2-way” entry system that allows quick access to all four drums. The roll-top covers can be easily lifted from waist height to access the drum tops. Swing out doors provide safety and convenience for loading and unloading drums. The low-profile (8 3/4”height) containment pallet positions drum-tops at a safe, convenient level to pour wastes into funnels or to use drum pumps. The multiple “4 -drum compartments” offer flexible usage for a broad range of operations , including: storage of virgin chemicals, active hazardous waste collection and storage of spill response supplies. The internal walls and separate sumps allow materials to be segregated. The system meets EPA Container Storage Regulation 40 CFR 264.175 and helps comply with NPDES, 40 CFR 122.26 (1999).