(A) Fine material, free from lumps and stone, selected from the spoil may be used for backfilling upon the written approval of the Department of Public Works Director.
(B) Under no conditions shall broken pavement, concrete, frozen dirt or materials or clumps of two inches in diameter or greater be used as backfill into the trench.
(C) All mud and water shall be pumped or removed from the trench prior to the insertion therein of any backfill material.
(D) Such backfill shall be done in a manner that will permit the restoration of the surface to a density condition not less than that existing prior to excavation, unless otherwise specified. The Director of Public Works may require soil tests to be furnished by a recognized soil testing laboratory or registered professional engineer when in his opinion backfill for any excavation is not being adequately compacted. In order for resurfacing to be allowed, such tests must show that the backfill material meets the minimum requirements as prescribed by the City Commission. All expense of such tests shall be borne by the permittee-applicant.
(1990 Code, § 4.15)