(A) Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradeable 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 (100) milligrams per liter (100 mg/l) or containing substances which may solidify or become viscous at temperatures 32-150° (0-65°C).
(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 to exceed the limitations 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, from suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(G) Any wastewater with objectionable color which cannot be removed to an acceptable level within the operation of the wastewater treatment process unless otherwise specifically noted in the Industrial User Permit (IUP).
(H) Water or wastes containing substances which are not amenable 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 Public Works Director. 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 Public Works Director may prohibit or condition the discharge(s) at any time.
(J) (1) Any water or wastes which have characteristics based on a twenty-four (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 | 1,000 mg/l |
TSS | 250 mg/l |
NH3-N | 25 mg/l |
Oil & Grease (total) | 100 mg/l |
Phosphorus, (total) | 20 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 addition of specific chemicals for proper treatment will also be subject to surcharge as noted on the Wastewater Contribution Permit. Discharge in excess of the effluent limits specified above shall not be deemed to constitute a violation of a permit condition or this chapter if the appropriate surcharge fee is paid and the discharge does not cause interference with or pass through the POTW.
(K) The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system subject to any alternative limitations and/or compliance schedule as established in the Industrial User Permit. 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)
| Monthly Average Concentration (mg/l) |
Parameter
| Maximum Daily Concentration (mg/l)
| Monthly Average Concentration (mg/l) |
Arsenic | 0.40 | |
Cadmium | 0.07 | |
Chromium, Total | 1.71 | |
Chromium, Hexavalent | 0.26 | |
Copper | 0.90 | |
Cyanide, Amenable | 0.33 | |
Lead | 0.35 | |
Mercury | 0.0008 | |
Molybdenum | 0.62 | |
Nickel | 1.10 | |
Selenium | 0.13 | |
Silver | 0.43 | |
Zinc | 1.48 | |
(L) The city has received authority through the U.S. EPA and State Statutes to enforce the requirements of 40 CFR Chapter I, Subchapter N, Parts 405-471, and 40 CFR Part 403, and 40 CFR Part 35. All users shall comply with the requirements of those regulations.
(M) The Public Works Director and/or his or her designee is authorized to establish local limits pursuant to 40 CFR 403.5(c). In addition, the Public Works Director may require Best Management Practices (BMPs), by ordinance or in individual wastewater discharge permits, to implement local limits and the requirements of this chapter. Such BMPs shall be considered local limits and pretreatment standards.
(Ord. 1991-7, passed 8-12-91; Am. Ord. 1994-2, passed 2-14-94; Am. Ord. 1998-09, passed 6-8-98; Am. Ord. 1999-10, passed 8-12-99; Am. Ord. 1999-14, passed 12-13-99; Am. Ord. 2001-12, passed 12-10-01; Am. Ord. 2002-11, passed 6-10-02; Am. Ord. 2009-09, passed 12-14-09; Am. Ord. 2011-13, passed 12-12-11; Am. Ord. 2017-011, passed 10-9-17; Am. Ord. 2023-002, passed 2-6-23) Penalty, see § 51.199