(A) Wastewater containing more than 25 milligrams per liter (25 mg/1) 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 100 milligrams per liter (100 mg/1) 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. Paper products are prohibited from being discharged into the sewer system.
(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 or 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 objectionable color which cannot be removed to an acceptable level within the operation of the wastewater treatment process but in no case, wastewater with a color that exceeds 300 ADMI units.
(H) Waters 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 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) (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/1 |
COD | 350 mg/1 |
TSS | 250 mg/1 |
NH3-N | 25 mg/1 |
Oil & Grease (total) | 100 mg/1 |
(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, provided such fee is in excess of $10. Surcharge fees that are calculated to be less than this amount will be issued at the city's discretion. Any other amenable constituents requiring the addition of specific chemicals for proper treatment will also be subject to 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 or this chapter if the appropriated surcharge fee is paid and the discharge does not cause interference or pass through of the POTW.
(K) The following discharge limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system subject to any 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. In accordance with 40 CFR 403, these limitations are considered pretreatment standards equivalent to the federal limitations established in 40 CER Subchapter N. These local limits are established to protect against pass through and interference. Additional and/or more stringent limits may be necessary if any pass through and/or interference are detected. Best management practices may be developed, or required by industry, to implement the prohibitions listed in 40 CFR 403.5(A)(1) or within this section. Such BMP's shall be considered local limits and pretreatment standards as determined by the city.
Parameter | Maximum Daily Concentration (mg/l) |
Parameter | Maximum Daily Concentration (mg/l) |
Arsenic | 0.71 |
Cadmium | 0.02 |
Chromium, Total | 2.77 |
Chromium, Hexavalent | 0.22 |
Copper | 2.12 |
Cyanide, Amenable | 0.86 |
Lead | 0.64 |
Mercury | 0.005 |
Nickel | 2.5 |
Selenium | 0.12 |
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 Subchapter N, 40 CFR Part 403, and 40 CFR Part 35. All users shall comply with the requirements of those regulations.
(M) The city reserves the right to establish limitations and requirements which are more stringent than those required in subsection (K) or by state or federal regulations if deemed necessary to comply with the objectives presented in §§ 51.25 through 51.27 or the general and specific prohibitions in §§ 51.51-51.52.
(Ord. 92-015, passed 12-14-92; Am. Ord. 97-001, passed 1-15-97; Am. Ord. 2012-001, passed 1-9-12; Am. Ord. 2015-005, passed 8-10-15; Am. Ord. 2020-007, passed 1-11-21)