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 governing body of the city, 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, or public property, or constitute a nuisance. In forming an opinion as to acceptability of these wastes, the governing body of the city 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 which must be considered are:
A. Any liquid or vapor having a temperature higher than one hundred fifty degrees Fahrenheit or sixty-five degrees Celsius;
B. Any water or waste containing fats, grease, wax, or oils, whether emulsified or not, in excess of one hundred mg/1 or containing substances which may solidify or become viscous at temperatures between thirty-two and one hundred fifty degrees Fahrenheit (zero and sixty-five degrees Celsius);
C. Any garbage that has not been properly shredded. The installation and operation of any garbage grinder larger than those normally manufactured and sold for residential and noncommercial use will not be installed without specific review and approval by the governing body of the city;
D. Any waters or wastes containing strong acid, iron pickling wastes, or concentrated plating solutions cannot be discharged to the sewerage system unless completely neutralized and approved by the governing body of the city for discharge;
E. Any waters or wastes containing reducing substances of an organic or inorganic nature, toxic or nontoxic, which exert an immediate chlorine demand if the discharge of such agents will prevent the achievement of an adequate chlorine residual in the effluent of the wastewater treatment facility;
F. Any waters or wastes containing phenols or other taste or odor producing substances, in concentrations exceeding limits established by the governing body of the city after treatment of the composite sewage, to meet the requirements of the 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 of the city in compliance with applicable state and 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 and sodium sulfate,
2. Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions,
3. Unusual chemical oxygen demand, or chlorine requirement in such quantities as to constitute a significant load on the sewage treatment works,
4. Slugs or shocks constituting an unusual volume of flow or concentration of wastes which will disturb the normal functioning of either the sewage treatment plant and/or collection system;
J. Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment process employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent can not meet the requirements of agencies having jurisdiction over discharge to the receiving waters. (Prior code § 4-3-47 (6))