No person shall discharge or cause to be discharged the following substances, materials, water or waste into a sanitary sewer, because such wastes can harm either the sewer, the sewage treatment process or the equipment, can have an adverse effect on the receiving stream, can otherwise endanger life, health or public property or can constitute a nuisance:
(a) Any storm water, surface water, ground water, roof runoff, subsurface drainage (i. e. subsoil drains either under basement floors or around the foundation), uncontaminated water or unpolluted industrial process water. Storm water and all other unpolluted drainage shall be discharged into storm sewers or a natural watercourse.
(b) Water or waste having a pH lower than 6.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the City;
(c) Solid or viscous substances in such quantities or of such size capable of causing obstruction to the flow in sewers or capable of causing other interference with the proper operation of sewerage facilities, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, garbage, whole blood, paunch manure, hair and fleshings and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders;
(d) Water or waste containing iron, chromium, magnesium, copper, zinc and 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 wastewater treatment plant exceeds the limits established by the City for such substances;
(e) Water or waste containing phenols or other taste or odor producing substances in concentrations which exceed limits which may be established by the City as necessary to meet discharge parameters prescribed by the State, Federal or other public agencies of jurisdiction, and any radioactive wastes or isotopes of such a half-life or concentration which may exceed limits established by the City in compliance with applicable State or Federal regulations;
(f) Water or waste having a pH in excess of 10.5 or any materials which exert or cause waters or wastes to have a pH in excess of 10.5;
(Ord. 94-19. Passed 11-21-94.)
(g) 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;
(h) Waters or waste which causes excessive discoloration, such as, but not limited to, dye wastes and vegetable tanning solutions;
(i) Water or waste with unusual biochemical oxygen demand, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment plant;
(j) Unusual volume of flow or concentration of wastes which exceeds, for any duration in excess of fifteen minutes, more than five times the average twenty-four hour period concentration or quantity of flow during normal periods;
(k) Water or waste containing substances which are not amenable to treatment by the wastewater treatment processes, except by written approval of the City Manager. Industrial discharges must meet the requirements of any other governmental agencies having jurisdiction over discharge to the receiving waters.
(l) Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (sixty-five degrees Centigrade);
(Ord. 80-8. Passed 6-10-80.)
(Ord. 80-8. Passed 6-10-80.)
(m) Water or waste containing fat, wax, grease or oil, whether emulsified or not, in excess of 100 mg/l, or containing substances which may solidify or become viscous at temperatures between thirty-two degrees Fahrenheit (zero degrees Centigrade) and 150 degrees Fahrenheit (sixty-two degrees Centigrade). Discharges of petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin are prohibited if discharged in amounts that can pass through or cause interference in the wastewater plant.
(n) Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems.
(o) Any trucked or hauled pollutants, including industrial and septic wastes, into any location of the sewer system or POTW at any time.
(Ord. 91-3. Passed 8-19-91.)
(p) Any garbage that has not been properly shredded (i. e. where the garbage grinder does not shred the garbage sufficiently and the shredded garbage interferes with the flow of sewage);
(q) Water or waste containing strong acid iron pickling wastes or concentrated plating solutions, whether neutralized or not;
(r) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid, gas or phenols; or
(s) Water or waste containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, which injure or interfere with any wastewater treatment process or constitute any hazard in the receiving waters of the wastewater treatment plant, including, but not limited to, cyanides in excess of two mg/l as CN in the wastes discharged to the sanitary sewer.
(Ord. 80-8. Passed 6-10-80.)