No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes if it appears likely, in the opinion of the Village and the MWRD, that such wastes can harm either the sewers, the sewage treatment process or equipment; can have an adverse effect on the receiving stream; or can otherwise endanger life, limb or public property or constitute a nuisance. In forming an opinion as to the acceptability of these wastes, the Village and MWRD representatives will give consideration to such factors as quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, and maximum limits established by regulatory agencies. The substances prohibited are:
(a) Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (sixty-five degrees Celsius);
(b) Any water or waste containing toxic or poisonous materials or oils, whether emulsified or not, in excess of 100 milligrams per liter, or containing substances which may solidify or become viscous at temperatures between thirty-two and 150 degrees Fahrenheit (zero degrees and sixty-four degrees Celsius);
(c) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the Village and the MWRD.
(d) Any water or waste containing strong acids, iron pickling wastes or concentrated plating solutions, whether neutralized or not;
(e) Any water or waste containing iron, chromium, copper, zinc or similar objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to such a degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Village and the MWRD for such materials;
(f) Any water or waste containing phenols or other taste or odor producing substances in concentrations exceeding limits which may be established by the Village or the MWRD as necessary after treatment of the composite sewage to meet the requirements of State, Federal or other public agencies of jurisdiction for such discharge to the receiving waters;
(g) Any radioactive waste or isotope of such a half-life or concentration as may exceed limits established by the Village and the MWRD in compliance with applicable State or Federal regulations;
(h) Any water or waste having a pH in excess of 9.5;
(i) Any mercury or any of its compounds in excess of 0.0005 milligrams per liter as Hg at any time, except as permitted by the Village or the MWRD in compliance with applicable State and Federal regulations;
(j) Any cyanide at any time, except as permitted by the Village and the MWRD in compliance with applicable State and Federal regulations;
(k) Materials which exert or cause:
(1) Unusual concentrations of inert suspended solids (such as, but not limited to, Fullers earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate);
(2) Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions);
(3) Unusual BOD, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works; or
(4) Unusual volumes of flow or concentrations of wastes constituting slugs; and
(l) Any water or waste 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 agencies having jurisdiction over discharge to the receiving waters.
(Ord. 795. Passed 9-27-93.)