Abstract: A placarding apparatus for use in connection with a transportable cylindrical storage tank of the type that includes a pair of opposing ends with an upper lifting lug and a lower pair of feet at each end. The placarding apparatus includes a first placard assembly that provides signage at each end of the storage tank and a second placard assembly that provides signage at each side of the tank. The first placard assembly includes a placard and strap assembly that connects the placard between one of the lifting lugs and one of the pairs of opposing feet. The strap assembly has a first portion that extends upwardly at one end from an upper aperture in the placard to the lifting lug at that end. It also includes a lower strap portion that extends downwardly from a lower aperture in the placard to a pair of strap segments that connect to each of the two feet at that end of the storage tank.