Excavated material such as spongy and vegetable surfaces, frozen material or boulders, broken concrete or rock with dimensions greater than six inches, trash and debris from construction operation shall be hauled to the dumping area designated by the engineer. Portions of the topsoil stripped from lawn areas and accepted by the engineer shall be stock piled for use within the construction site to be used in replacing topsoil in embankments or shoulders. The sale of topsoil stripped from the construction site shall not be allowed unless specifically detailed in the construction documents. Any excess topsoil shall be hauled and stock piled as directed by the engineer.