(1) Materials for backfill will be of select nature. All broken concrete, peat, decomposed vegetable matter and similar materials obtained from excavation will be removed from the site prior to beginning of backfilling. All backfill will be placed in layers not over eight inches (8"), loose measured, in thickness. Compaction will be obtained by mechanical rollers, mechanical tampers or similar means. Material for backfilling will have optimum moisture to ensure compaction to a degree equivalent to that of the undisturbed ground in which the trench was dug. Jetting or internal vibrating methods of compacting sand fill or similar methods of compacting sand or similar granular free draining materials will be permitted.
(2) The density (dry) of the backfill under pavements, sidewalks, curbs or other structures will not be less than that existing prior to excavation. The fill shall be restored and placed in a good condition, which will prevent settling. (Prior Code § 11-385)