Fine materials free from lumps and stone and selected from the spoil shall be thoroughly compacted around and under the substructure to the upper level of such substructure. Above the upper level of the substructure, backfill material shall be placed to the subgrade of the pavement in lifts consistent with the type of soil involved and the method of consolidation being used. Broken pavement, large stones, roots and other debris shall not be used in the backfill. Each lift shall be flooded, fettled, rolled or tamped, or a combination of these methods shall be used depending upon the type of soil involved, to compact the backfill material. Such backfill shall be done in a manner that will permit restoration of the surface to a condition equivalent to that which it was in prior to excavation. The administrative authority shall require soil tests and/or compaction tests to be furnished by a recognized soil-testing laboratory or registered professional engineer specializing in soil mechanics. In order for the resurfacing to be permitted, such tests must show that the back fill material and compaction meets the minimum requirements as prescribed by the administrative authority. All expense of such tests shall be borne by the permittee. (Ord. 183 §l, 1973; Ord. 106 §20, 1961).