(A) Discharges of various substances, materials, waters or wastes to the sewer systems shall be limited to concentrations or quantities which in the judgment of the village will not harm the sewers, wastewater treatment process or equipment, will not have an adverse effect on the groundwater, or will not otherwise endanger, lives, limb, public property or constitute a nuisance. The village may set limitations more restrictive than the limitations established in the regulations below if, in its own opinion, such limitations are necessary to meet the above prohibitions. In forming its opinion as to the acceptability of a particular waste being discharged to the sanitary sewer, the village will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, materials or construction of the sewers, the wastewater treatment process employed, the treatability of the waste in the wastewater treatment plant, and other pertinent factors.
(B) The limitations or restrictions on materials or characteristics of waste or wastewater discharged to the sanitary sewer, which shall not be violated without approval of the village, are as follows:
(1) Wastewater having a temperature higher than 150°F (65°C);
(2) Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils, or products of mineral oil origin;
(3) Gasoline, benzine, naptha, fuel oil or other flammable or explosive liquid solid or gas;
(4) Water or wastes containing toxic or poisonous solids, liquids or gases pursuant to the Clean Water Act § 307(a) (33 U.S.C. § 1317) in sufficient quantity, either singularly or by interaction with other wastes, to injure or interfere with any waste treatment process, to constitute a hazard to humans or animals, or to create a public nuisance in the receiving waters or the wastewater treatment works;
(5) Wastewater from industrial plants containing floatable oil, fat or grease;
(6) Solid or viscous substances in quantities of or in such size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the wastewater facilities such as, but not limited to, ashes, sand, mud, straw, shavings, metal, glass, rags, manure, hair and fleshing, entrails, and paper dishes, cups, milk containers and the like, either whole or ground by garbage grinders;
(7) (a) Garbage that has not been properly shredded.
(b) Garbage grinders may be connected to sanitary sewers from homes, hotels, 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;
(8) Water or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances in concentrations that would result in the composite wastewater at the wastewater treatment works exceeding the limits established by the approved village;
(9) Water or wastes containing odor-producing substances exceeding limits which may be established by the village;
(10) Water or wastes having a pH lower than 6.0 or having other corrosive properties capable of causing damage or hazard to structures, equipment and personnel or the wastewater works;
(11) Radioactive wastes or isotopes of such half-life or concentrations as may exceed limits established by the village in compliance with state and federal regulations;
(12) Quantities of flow, concentrations or both which constitute a slug as defined herein;
(13) Water or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amendable to treatment only to such degree that the wastewater treatment plant’s effluent cannot meet the requirements of the village’s groundwater discharge or surface water discharge permits;
(14) Water or wastes which, by interaction with other waste or wastes in the public sewer system, release obnoxious gases, which interfere with the collection system or create a condition deleterious to structures and treatment processes; and
(15) Materials(s) which exert(s) or cause(s):
(a) Unusual BOD, COD (chemical oxygen demand) or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment works;
(b) Unusual flow volumes of concentrated wastes constituting slugs as defined herein;
(c) Unusual concentrations of inert suspended solids (such as fuller’s earth, lime slurries and lime residues) or dissolved solids (such as sodium sulfate); and
(d) Excessive discoloration (such as dye wastes and vegetable tanning solutions).
(Ord. 130, passed 5-19-1992)