62-193. Prohibited discharges.

Any liquid or vapor having a temperature higher than 150° F. (65° C.).

Any waters or wastes which contain fats, grease or oil, or other substances in excess of 100 mg/l, whether emulsified or not, that will solidify or become viscous at temperatures between 32° F. and 150° F.

Any waters or wastes containing soluble fats, grease or oils, whether emulsified or not, exceeding an average 100 parts per million, which, in the opinion of the City, may overload or inhibit the pollution control facility's processes.

Any gasoline, benzene, naphtha, fuel oil, mineral oil, or other flammable or explosive liquid, solid or gas.

Any noxious or malodorous gas such as hydrogen sulfide, sulfur dioxide or nitrous oxide, or other substances which, either singly or by interaction with other wastes, are capable of creating a public nuisance or hazard to life or of preventing entry into sewers for their maintenance and repair.

Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower or greater shall be subject to the review and approval of the City.

Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastic, cardboard, wood, paunch manure, hair and fleshings, entrails, lime slurry, lime residues, beer or distillery slops, whey, chemical residues, paint residues, cannery waste, bulk solids, or other solid or viscous substance capable of causing obstruction to the flow of the sewers or other interference with proper operation of the sewage works.

Any waters or wastes, acid and alkaline in reaction, having corrosive properties capable of causing damage or hazard to structures, equipment and personnel of the sewage works. Free acids and alkalis must be neutralized at all times, within a permissible pH range of 6.0 to 9.5.

Radioactive wastes or isotopes of halflife or concentrations as may exceed limits established by the City in compliance with applicable state or federal regulations.

Quantities of flow, or concentrations of any wastewater constituent, or both, which would constitute a slug.

Any stormwater, roof drainage, spring water, cistern or tank overflow, footing drainage, or discharge from any vehicle wash rack or water motor, or the contents of any privy vault, septic tank or cesspool, or the discharge of effluent from any air conditioning machine or refrigeration unit.

Any waters or wastes containing a toxic or poisonous substance, high chlorine or oxygen demand, or suspended solids in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard or violation in the receiving waters or effluent of the City's sewage treatment plant, or contaminate or restrict the final end use of the treatment plant's sludge residuals. Such toxic substances shall be limited to the average concentrations listed in this subsection in the sewage as it leaves the building sewer, and at no time shall the hourly concentration at the sewage treatment plant exceed three times the average concentration. If concentrations listed are exceeded, individual establishments will be subject to control by the City in volume and concentration of wastes discharged.

Waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions, whether neutralized or not.

Waters or wastes containing phenols, or other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the City as necessary, 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.

Waters or wastes containing substances which are not amenable to treatment or reduction by the waste treatment processes employed, which may inhibit treatment plant processes or sludge quality or disposal, or which are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over the discharge to the receiving waters.

Any heated waters or pollutants in amounts which will inhibit or interfere with biological activity in the City's wastewater treatment facilities, but in no case heated waters or pollutants in such quantities that the temperature at the pollution control facility's influent exceeds 104° F. (40° C.).

Any waters or wastes containing color, dissolved solids, or dye which would cause a visible discoloration of the treatment's plant's effluent or receiving water.

Any waters or wastes containing suspended solids, whether inert or organic, which would cause visible turbidity of the treatment plant's effluent or receiving water.

Any waters, wastes or substance which would cause the treatment plant's effluent to exceed toxicity testing limits as may be required by applicable state or federal law.

Any boiler blowoffs or sediment trap wastes.

Any septage or septic process discharge without the express written approval of the City.