(A) No person shall discharge or cause to be discharged any unpolluted waters such as stormwater, surface water, ground water, roof runoff, subsurface drainage or cooling water to any sewer, except stormwater runoff from limited areas, which stormwater may be polluted at times, may be discharged to the sanitary sewer by permission of the Superintendent.
(B) Stormwater, other than that exempted under division (A) above, and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers, to a natural outlet approved by the Superintendent and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the Superintendent, to a storm sewer, combined sewer or natural outlet.
(C) No person shall discharge or cause to be discharged any of the following described water or wastes to any public sewers:
(1) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
(2) Any waters containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the wastewater treatment plant;
(3) Any waters or wastes having a pH lower than (5.5) or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater works; and
(4) Solid or viscous substances in quantities or of such size capable of causing obstruction of the flow in sewers, or other interference with the proper operation of the wastewater facilities such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails and paper dishes, cups, milk containers and the like either whole or ground by garbage grinders.
(D) (1) The following described substances, materials, waters or waste shall be limited in discharges to municipal systems or 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. The Superintendent may set limitations lower than the limitations established in the regulations below if in his or her opinion such more severe limitations are necessary to meet the above objectives. In forming his or her opinion as to the acceptability, the Superintendent 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, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of treatability of the waste in the wastewater treatment plant and other pertinent factors.
(2) The limitations or restrictions on material or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the Superintendent are as follows:
(a) Wastewater having a temperature higher than 150°F (65°C);
(b) Wastewater containing more than 25 milligrams per liter of petroleum oil, non-biodegradable cutting oils or product of mineral oil origin;
(c) Wastewater from industrial plants containing floatable oils, fat or grease;
(d) Any garbage that has not been properly shredded. Garbage grinders may be connected to sanitary sewers from home, 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;
(e) Any waters of 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 Superintendent for such materials;
(f) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Superintendent;
(g) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations;
(h) Quantities of flow, concentrations, or both, which constitute a “slug” as defined in § 11.01 of this code of ordinances;
(i) 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 effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters; and
(j) 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.
(E) (1) 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 division (D) above, and which in the judgment of the Superintendent 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 Superintendent may:
(a) Reject the wastes;
(b) Require pretreatment to an acceptable condition for discharge to the public sewers;
(c) Require control over the quantities and rates of discharge; and/or
(d) Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of § 53.06(D).
(2) When considering the above alternatives, the Superintendent shall give consideration to the economic impact of each alternative on the discharger. If the Superintendent 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 Superintendent.
(Prior Code, § 4.04.06) (Ord. 564, passed - -; Ord. 731, passed - -)