The following discharges are restricted:
(A) Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils or products of mineral oil origin;
(B) Wastewater from industrial plants, commercial business or other non-domestic connections 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 between 32°F (0°C) and 150°F (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 interactions with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW or to exceed the limitations set forth in a federal pretreatment standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to § 307(a) of the Act, being 33 U.S.C. § 1317(a);
(E) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state and/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 not removable in the POTW, but in no case, wastewater with a color at the introduction into the POTW 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 or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving stream of the POTW;
(I) (1) Any water or waste which has characteristics based on a 24-hour composite sample, grab or a shorter period composite sample if more representative, which exceed the following normal maximum domestic wastewater parameter concentrations:
Parameter | Daily Maximum Allowable Concentration Without Surcharge |
BOD | 250 mg/l |
NH-N | 30 mg/l |
TSS | 250 mg/l |
(2) Discharges greater than these concentrations may be subject to penalties contained in the Enforcement Response Plan for the city in addition to surcharge.
(J) The city has received authority through U.S. EPA and state statutes to enforce the requirements of 40 C.F.R. subpart N and 40 C.F.R. part 403. All users shall comply with the requirements of those regulations as well as with all sections of this chapter;
(K) (1) Any waste or wastewater classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA), being 42 U.S.C. §§ 6901 et seq., without at least a 60-day prior notification of such discharge to the Superintendent of the POTW.
(2) This notification must include the name of the waste, EPA hazardous waste number, type of discharge, volume/mass of discharge and time of occurrence. The Superintendent may deny or condition this discharge at any time; and
(L) The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system.
Parameter | Maximum Daily Concentration |
Parameter | Maximum Daily Concentration |
Arsenic, total | 0.10 mg/l |
Cadmium, total | 0.06 mg/l |
Chromium, total | 1.0 mg/l |
Copper, total | 1.1 mg/l |
Cyanide, total | 0.10 mg/l |
Lead, total | 0.3 mg/l |
Mercury, total | 0.01 mg/l |
Nickel, total | 0.7 mg/l |
Oil and grease, total | 100 mg/l |
pH | 6 to 9.5 |
Silver, total | 0.1 mg/l |
Zinc, total | 1.5 mg/l |
(Ord. 634, passed 3-5-2002)