The following described substances, materials, waters or wastes shall be limited in discharges to municipal systems to concentration or quantities which will not harm either the sewers, wastewater treatment process or equipment, will maintain and protect water quality in the receiving stream, and will not otherwise endanger lives, limb, public property, or constitute a nuisance. The Superintendent may set additional limitations or limitations more stringent than those established in the provisions below if in his or her opinion more severe limitations are necessary to meet the above objectives. In forming his or her opinion as to the acceptability of a discharge, the Superintendent shall 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.
(A) Wastewater containing more than fifty milligrams per liter (50 mg/l) of petroleum oil, nonbiodegradable cutting oils, or products of mineral oil origin.
(B) Wastewater containing floatable oils, fat, or grease, whether emulsified or not, in excess of one hundred milligrams per liter (100 mg/l) or containing substances which may solidify or become viscous at temperatures thirty-two to one hundred fifty degrees (32-150°) Fahrenheit (zero to sixty-five degrees (0-65°) Celsius).
(C) Any garbage that has not been properly shredded. Garbage grinders may be connected to sanitary sewers from homes, motels, 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.
(D) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants which: injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, causes the city to violate the terms of its KPDES permit, prevents the use of acceptable sludge disposal methods, or exceed a limitation set forth in a categorical pretreatment standard.
(E) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the city in compliance with applicable state and federal regulations.
(F) 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.
(G) Any wastewater with objectable color which cannot be removed to an acceptable level within the operation of the wastewater treatment process.
(H) Waters or wastes containing substances which are not amendable to treatment or reduction by the wastewater treatment processes employed to the extent required by the city's NPDES/KPDES permit.
(I) Any waste(s) or wastewater(s) classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA) without a sixty (60) day prior notification of such discharge to the Superintendent. This notification must include the name of the hazardous waste, the EPA hazardous waste number, type of discharge, volume/mass of discharge and time of occurrence(s). The Superintendent may prohibit or condition the discharge(s) at any time.
(J) Wastewater identified as causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test.
(K) Recognizable portions of human or animal anatomy.
(L) Any wastes containing detergents, surface active agents, or other substances which will cause excessive foaming in the municipal wastewater system.
(M) (1) Any water or wastes which have characteristics based on a twenty-four hour (24-hour) composite sample, grab or a shorter period composite sample, if more representative, that exceed the following normal maximum domestic wastewater parameter concentrations:
Parameter | Maximum allowable concentration without surcharges |
BOD | 250 mg/l |
COD | 375 mg/l |
TSS | 250 mg/l |
NH3-N | 40 mg/l |
Oil & grease (total) | 100 mg/l |
(2) Any person discharging wastewater exceeding the maximum allowable concentration as noted above, will be subject to a surcharge fee for each pound loading over and above the set limit. Any other amenable constituents requiring the additional of specific chemicals for proper treatment will also be subject to a surcharge as noted on the wastewater discharge permit. Exceedance of the effluent limits specified above shall not be deemed to constitute a violation of a permit condition of this chapter if the appropriated surcharge fee is paid and the discharge does not cause interference or pass through of the POTW.
(N) The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system. All significant industrial users must comply with these limitations where they are more stringent than applicable state and/or federal regulations.
Parameter | Maximum daily concentration (mg/l) |
Arsenic | To be determined by amendment if and when applicable. |
Cadmium | |
Chromium | |
Copper | |
Cyanide, total | |
Lead | |
Mercury | |
Nickel | |
Silver | |
Zinc | |
Total toxic organics | |
(O) The city has received authority through the U.S. EPA and state statutes to enforce the requirements of 40 CFR Subchapter N, 40 CFR 403, and 40 CFR Part 35. All users shall comply with the requirements of those regulations.
(Ord. 2003-08, passed 6-21-04) Penalty, see § 50.999