The following described substances, materials, waters or wastes shall be limited to discharges to municipal systems to concentrations of quantities which will not harm either the sewers, the sludge of any municipal system, the 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 director of public works may set limitations lower than the limitations established in the regulations below if, in his opinion, such more severe limitations are necessary to meet the above objectives. In forming his opinion as to the acceptability, the director of public works 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, 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 director of public works are as follows:
(A) Wastewater having a temperature higher than one hundred fifty degrees Fahrenheit (150°F) (65°C).
(B) Wastewater containing more than twenty five milligrams per liter (25 mg/l) of petroleum oil, nonbiodegradable 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 homes, hotels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purposes of consumption on the premises or when served by caterers.
(E) 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 director of public works for such materials.
(F) Any waters or wastes containing odor producing substances exceeding limits which may be established by the director of public works in compliance with applicable state or federal regulations.
(G) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the director of public works in compliance with applicable state or federal regulations.
(H) Quantities of flow, concentrations, or both which constitute a "slug" as defined in section 8-4-24 of this chapter.
(I) Waters or wastes containing substances which are not amenable to treatment or reductions 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.
(J) Any water or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases, from suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes. (Ord. 722, 5-21-1984)