Two IBC tanks can be stored side-by-side on the Ultra-Twin IBC Spill Pallet Economical as well as space saving, the large, 535-gallon spill containment sump meets EPA and SPCC spill containment regulations for storing two IBC tanks. Optional Bucket Shelves are available as an add-on, to catch drips and leads from dispensing spouts. Excellent chemical compatibility provided by all polyethylene construction.