Earthen reserve pits which contain no saltwater, oil, oil derivatives, caustics, acids or other deleterious substances harmful to soil or vegetation, or injurious to animal or human life, shall be allowed to be constructed or used in connection with the drilling, swabbing, cleaning out or reworking of oil and gas wells within the city. The contents thereof need not be transported from the premises to a disposal facility, provided that the same are leveled and the surface of the ground restored as nearly as possible to its original condition within 90 days after completion of the drilling, swabbing, clean out or reworking operations.
(Prior Code, § 5-708)