(A) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff or subsurface drainage to any sanitary sewer.
(B) Storm water and all other unpolluted waters shall be discharged to such sewers as are specifically designated as storm sewers, or to a natural outlet approved by proper authorities.
(C) No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers.
(1) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantities, either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant.
(3) Any waters or wastes having corrosive properties capable of causing damage or hazard to structures, equipment and personnel of the sewage works.
(4) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the sewage works, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
(D) No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes to any public sewers, unless it appears likely, in the opinion of the Superintendent, that such wastes will not harm either the sewers, the sewage treatment process or sewage treatment equipment, nor have an adverse effect on the receiving stream, nor otherwise endanger life, limb or public property, nor constitute a nuisance. In forming his or her opinion as to the acceptability of these wastes, the Superintendent will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, the materials used in construction of the sewers, the nature of the sewage treatment process, the capacity of the sewage treatment plant, and other pertinent factors. Nonacceptable substances include, but are not limited to, the following:
(1) Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (65 degrees Centigrade).
(2) Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l, of which not more than 25 mg/l is soluble oils, or containing substances which may solidify or become so highly viscous as to retard flow in the sewer system at temperatures between 32 degrees and 150 degrees Fahrenheit (0 and 65 degrees Centigrade).
(3) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder (other than in a residence) may be subject to the review and approval of the Superintendent.
(4) Any waters or wastes containing strong acid iron-pickling wastes, or concentrated plating solutions, whether neutralized or not.
(5) Any waters or wastes exceeding the following maximum allowable limits: 2.0 mg/l of total zinc, 2.0 mg/l of total chromium, 0.2 mg/l of cadmium, 1.0 mg/l of total copper, 0.5 mg/l of cyanide, 2.0 mg/l of total nickel, 2.0 mg/l of phenol, 10.0 mg/l of iron, and similar objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Superintendent for such materials.
(6) Any waters or wastes containing phenols or other taste or odor-producing substances after treatment of the composite sewage, in such concentrations that exceed limits which may be established by the Superintendent as necessary to meet the requirements of the State, Federal or other public agencies of jurisdiction for such discharge to the respective waters.
(7) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable State or Federal regulations.
(8) Any waters or wastes having a pH of less than six or in excess of nine.
(9) Materials which exert or cause:
(a) Unusual concentrations of inert suspended solids, such as, but not limited to, Fuller’s earth, lime slurries and lime residues, or of dissolved solids, such as, but not limited to, sodium chloride and sodium sulfate.
(b) Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions.
(c) Unusual BOD, COD or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment plant.
(d) Unusual volume of flow or concentration of wastes constituting “slugs,” as defined in § 172.01.
(10) Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such a degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(Ord. 740, passed 5-16-94)