An apparatus and method of use for a portable precast slab system for industrial equipment that can be placed at locations where permanent foundations cannot be installed, or where an immediately usable foundation is needed. The slab is preferably about 4″-24″ in thickness, preferably at least about 6′ in length, and preferably at least about 6′ in width; multiple pieces may be used to form the slab. The slab may have attachment means incorporated in order to move the slab. If a bulk storage tank is placed upon the slab, preferably at least about 8 feet by about 8 feet area adjacent to the tank will be available for delivery of liquid cryogen. A method of making and using the slab is also contemplated, and the slab may also be used as a splash pad, and a pad for cryogenic pumps.