All excavations shall be promptly backfilled by applicant, and the surface restored to the exact type of surface and thickness as prior to excavation. Where the excavation is within the surface area of any street or sidewalk, it shall be backfilled in the following manner: the trench or excavated area must be filled by using sand or stone screenings in layers not to exceed six inches (6") in depth, and each layer shall be thoroughly compacted by wetting with water and tamping by the use of ramming tools or hand tampers. (Ord. 397B, 11-2-1959)