(A) No user shall contribute, or cause to be contributed, directly or indirectly, any pollutant or waste water which will interfere with the operation or performance of the POTW. These general prohibitions apply to all such users of a POTW whether or not the user is subject to National Categorical Pretreatment Standards or any other national, state or local pretreatment standard or requirement.
(B) A user shall not contribute the following substances to any POTW:
(1) Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than 140°F or 60°C using the test methods specified in 40 C.F.R. § 261.21;
(2) Pollutants which will cause corrosive structural damage to the POTW, but in no case discharges with pH lower than six or higher than nine unless the works is specifically designed to accommodate the discharges;
(3) Any pollutant, including oxygen demanding pollutant (BOD and the like) released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW;
(4) Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting interference;
(5) Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW Treatment Plant exceeds 104°F (40°C) unless the state, upon request of the POTW, approves alternate temperature limits;
(6) Any substance which may cause the POTW's effluent or other product of the POTW such as residues, sludge or scum, to be unsuitable for reclamation and reuse or to interfere with the reclamation process where the POTW is pursuing a reuse and reclamation program. In no case shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used;
(7) Any substance which will cause the POTW to violate its NPDES/KPDES and/or sludge disposal system permit or the receiving water quality standards;
(8) Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems;
(9) Any trucked or hauled pollutants, except at discharge points designated by the Manager;
(10) Waste water containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils or products of mineral oil origin;
(11) Any waste water containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any waste water treatment process, to constitute a hazard to humans or animals, to create a toxic effect in the receiving waters of the POTW, or to exceed the limitation set forth in a Categorical Pretreatment Standard. A toxic pollutant shall include, but not be limited to, any pollutant identified pursuant to § 307(a) of the Act;
(12) Waste water from industrial plants or commercial businesses containing floatable oils, fat or grease, whether emulsified or not, in excess of 100 milligrams per liter or containing substances which may solidify or become viscous at temperatures 32° through 150°F (0° through 65°C);
(13) Any waste water with objectionable color not removable in the POTW, but in no case, waste water with a color at the introduction into the POTW that exceeds 300 ADMI units;
(14) 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. The installation and operation of any garbage grinder equipped with a three-fourths HP motor or greater shall be subject to review and approval;
(15) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the city;
(16) 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;
(17) Any waste(s) or waste water(s) classified as a hazardous waste by the Resource Conservation and Recovery (RCRA) without a 60-day prior notification of such discharge to the city. 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 Manager may prohibit or condition the discharge(s) at any time;
(18) 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;
(19) Waters and wastes containing substances which are not amenable to treatment or reduction by the waste water treatment processes employed or are amenable to treatment only to the degree that the waste water treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters;
Table 1. Incompatible Pollutant Limitations
Pollutant | Maximum Daily Average Concentration (mg/L) |
Pollutant | Maximum Daily Average Concentration (mg/L) |
Biochemical Oxygen Demand (5 day)* | 350.0 |
Suspended Solids* | 350.0 |
Ammonia* | 20.0 |
Arsenic | 0.57 |
Cadmium | 0.09 |
Chromium, Total | 2.77 |
Chromium, Hexvalent | 1.3 |
Copper | 3.22 |
Cyanide, amenable | 0.07 |
Iron | 30 |
Lead | 0.45 |
Mercury | 0.007 |
Nickel | 2.08 |
Selenium | 0.21 |
Silver | 0.81 |
Zinc | 3.98 |
*Surcharge begins above this concentration limit, and a maximum limit may be established by the Manager.
(20) Any additional regulations as established by the Sewerage and Water Works Commission pursuant to § 53.02.
(Ord. 7-92, passed 2-4-1992; Ord. 15-2009, passed 8-20-2009; Ord. 26-2019, passed 12-17- 2019) Penalty, see § 52.999