No person shall discharge or cause to be discharged the following substances, materials, waters or wastes if it appears likely in the opinion of the governing body or its agent that such wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream or can otherwise endanger life, limb, public property or constitute a nuisance. In forming its opinion as to the acceptability of these waters, the governing body or its agent will give consideration to such factors as the 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, degree of treatability of wastes in the sewage treatment plant and other pertinent factors. The substances prohibited are:
(A) Any liquid or vapor having a temperature higher than 150° F (65° C).
(B) Any water or waste containing fats, wax, grease, or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32° and 150° F (0° and 65° C).
(C) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor 3/4 horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the governing body or its agent.
(D) Any waters or wastes containing strong acid iron pickling wastes or concentrated plating solutions whether neutralized or not.
(E) Any water or wastes containing iron, chromium, copper, zinc, 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 governing body or its agent for such materials.
(F) Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the governing body or its agent 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 wastes or isotopes of such half-life or concentration as may exceed limits established by the governing body or its agent in compliance with applicable state or federal regulations.
(H) Any waters or wastes having a pH in excess of 9.5.
(I) Materials which exert or cause:
(1) 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 or 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.
(4) Unusual volume of flow or concentration of wastes constituting “slugs” as defined herein.
(J) 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 degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(`75 Code, § 3-211) (Ord. 445, passed 11-4-03)