All work under said permits shall be done in conformity with the provisions of this chapter, the terms of the applications and permits, and under the supervision and subject to the approval of the City Engineer. Upon completion of the excavation, cut, or tunnel, all surplus earth, rubbish or other material shall be removed immediately and the street or surface pavement shall be replaced in as good or better condition than it was before. (Ord. 1700 § 5, amended, 1971)