Rotary mud, drill cuttings, oil field waste, oil or liquid hydrocarbons and all other oil field wastes derived or resulting from or connected with the drilling of any well shall be discharged into a sump hole or into a steel tank if an operator is so directed by the Agency. The drill cuttings, rotary mud and drilling waste materials shall be removed from the drill site upon completion of drilling operations. Tanks used as and for sump purposes shall be removed from the drill site. Sump holes shall be drained, backfilled and compacted to 90% compaction with earth to the level of the surrounding terrain within 30 days from and after completion of drilling. When required by the Agency, an operator shall make compaction tests and submit the results thereof to the Agency.
(`78 Code, § 14.16.070.)