(A) A user shall not contribute the following substances to the POTW:
(1) Wastewater containing more than 100 mg/l of petroleum oil, non-biodegradable cutting oils or products of mineral oil origin;
(2) Wastewater containing floatable oils, fat or grease, whether emulsified or not, in excess of 200 mg/l or containing substances which may solidify or become viscous at temperatures 32°-150° (0°-65°C);
(3) 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 and Styrofoam products are prohibited from being discharged into the sanitary sewer system;
(4) 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;
(5) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, condensate, deionized water, non-contact cooling water and unpolluted industrial wastewater, unless specifically authorized by the Pretreatment Coordinator;
(6) 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;
(7) 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 an industrial user permit;
(8) Any medical wastes, except as specifically authorized by the Pretreatment Coordinator in an industrial user permit, and an recognizable portions of human or animal anatomy;
(9) Any wastes containing detergents, surface active agents or other substances which will cause excessive foaming in the municipal wastewater system;
(10) 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/or federal regulations;
(11) 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;
(12) Any waste(s) or wastewater(s) classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA) without a 60-day prior notification of such discharge to the Pretreatment Coordinator. 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 Pretreatment Coordinator may prohibit or place conditions on the discharge(s) at any time;
(13) (a) Any water or wastes which have characteristics based on a 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 |
NH3-N | 30 mg/l |
Oil and grease (total) | 100 mg/l |
TSS | 250 mg/l |
(b) 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 surcharge limit. Any other amenable constituents requiring the addition of specific chemicals for proper treatment will also be subject to surcharge as noted on the industrial user 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.
(14) 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 by the City Engineer. 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 C.F.R. part 403, these limitations are considered pretreatment standards equivalent to the federal limitations established in 40 C.F.R. Subch. N.
Parameter (mg/l) | Maximum Daily Concentration |
Parameter (mg/l) | Maximum Daily Concentration |
Arsenic | 0.41 |
Cadmium | 0.05 |
Chromium, Hexavalent | 0.86 |
Chromium, Total | 1.71 |
Copper | 3.38 |
Cyanide, Amenable | 0.60 |
Lead | 0.56 |
Mercury | 0.005 |
Molybdenum | 0.92 |
Nickel | 1.37 |
Selenium | 0.51 |
Silver | 0.93 |
Zinc | 1.48 |
(15) Any water or wastewater identified as causing, alone or in conjunction with other wastewater, the treatment plant’s effluent to fail a whole effluent toxicity (WET) test.
(B) The city reserves the right to establish limitations and requirements which are more stringent than those required above or by state or federal regulations if deemed necessary to comply with the objectives presented in §§ 52.001 through 52.003 of this chapter or the general and specific prohibitions in §§ 52.066 and 52.067 of this chapter.
(C) The city has received authority through the U.S. EPA and state statutes to enforce the requirements of 40 C.F.R. Ch. I, Subch. N, parts 405 through 471, 40 C.F.R. part 403 and 40 C.F.R. part 35. All users shall comply with the requirements of those regulations where applicable.
(D) The Pretreatment Coordinator, and/or his or her designee, is authorized to establish local limits pursuant to 40 C.F.R. § 403.5(c). In addition, the Pretreatment Coordinator may require the development of 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. 013-137, passed 6-24-2013; Ord. 020-010, passed 8-10-2020) Penalty, see § 52.999