(A) The discharge of substances, materials, waters or waste shall be limited in the system to concentrations or quantities which will not harm either the sewers, wastewater treatment process or equipment, will not have an adverse effect on the receiving stream, or will not otherwise endanger lives, limb, public property or constitute a nuisance.
(B) The limitations on such discharges shall be in accordance with the more restrictive limitations imposed by the National Pollutant Discharge Elimination System permit; industrial wastes ordinances adopted by the City of Columbus; or ordinances adopted by the municipality. Until such time as any of the preceding limitations are established, the limitations in division (C) below shall prevail.
(C) The Engineer may set limitations lower than the limitations established in the regulations below if in his opinion the more severe limitations are necessary to meet the objectives of this section. In forming his opinion as to the acceptability, the Engineer will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the Engineer are as follows:
(1) Wastewater having a temperature higher than 150° F. (65° C.)
(2) Wastewater containing more than 25 milligrams per liter of petroleum oil, non-biodegradable cutting oils or product of mineral oil origin.
(3) Wastewater from industrial plants containing floatable oils, fat or grease.
(4) Any garbage that has not been properly shredded as defined in § 51.01. Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
(5) Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the Engineer for such materials.
(6) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Engineer.
(7) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Engineer in compliance with applicable state or federal regulations.
(8) Quantities of flow, concentrations or both which constitute a "slug" as defined in § 51.01.
(9) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(10) Any water or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system or create a condition deleterious to structures and treatment processes.
(D) If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in divisions (A), (B) and (C) above, and which in the judgment of the Engineer may have a deleterious effect upon the wastewater facilities, processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Engineer may:
(1) Reject the wastes;
(2) Require pretreatment to an acceptable condition for discharge to the public sewers;
(3) Require control over the quantities and rates of discharge; and/or
(4) Require payment to cover added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of § 51.47.
If the Engineer permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the Engineer.
('80 Code, § 921.05(d) - (g)) (Ord. 59-74, passed 11-18-74)