Except as hereinafter provided, no person shall install or permit the installation of, or discharge or cause to be discharged to any public sewer, any of the following described apparatus, substance, wastes, or waters.
(a) To connect any floor drain, pit drain, or any other drain subject to receiving oil, grease, or gasoline to any sewer or drain connected thereto, unless a suitable trap, approved by the Sewer Engineer, is provided that will prevent oils and greases from entering the sewer.

(b) To discharge into any sewer or drain connected to the sewerage system any oils, greases, fats, acids, chemicals, iron or mineral wastes, ashes or cinders, garbage, dead animals, rags, hair, toxic material, or wastes which may cause clogging, or which may be injurious to the sewage utility, or interferes with the proper treatment of domestic sewage, or the operation and maintenance of the sewage treatment plant.

(c) To discharge into sewerage system or into any drain connected thereto any hot, suffocating, corrosive, inflammable, or explosive liquids, gases, acids, vaporous substances, or toxic material or liquid that can endanger life, limb, public property, or constitute a nuisance.

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

(e) Any water or waste containing fats, wax, grease, or oils, whether emulsified or not in excess of 100 mg/L (N Hexane Soluble) or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F.

(f) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horse-power (0.76 H.P. metric) or larger shall be subject to the review and approval of the Sanitary District Superintendent.

(g) Any waters or wastes that have a pH below 5.0 or above 10 or contain concentrated plating solutions whether neutralized or not.

(h) Any water or wastes that contain phenols in excess of 0.50 parts per million by weight (500 parts per billion).

(i) Any waters or wastes containing a toxic or poisonous substance, or of high chlorine demand in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard in receiving water or storm water overflows or the effluent of the sewage treatment plant. Materials such as copper, zinc, chromium, and similar toxic substances shall be limited to the following average quantities in the sewage as it arrives at the sewage treatment plant and at no time shall the hourly concentration at the sewage treatment plant exceed three times the average concentration.

Iron (Fe) 15 mg/L
Chromium (Cr) 5 mg/L
Copper (Cu) 3 mg/L
Zinc (Zn) 2 mg/L
Chlorine demand 30 mg/L
Cadmium (Cd) 0.1 mg/L
Mercury (Hg) 0.002 mg/L
Lead (Pb) 0.05 mg/L

Contributions of greater volume or concentration from individual establishments shall be subject to control by the Board of Sanitary Commissioners.

(j) Any cyanides (Cn) in excess of two parts per million by weight in the wastes from any outlet into the public sewers.

(k) Any water or wastes containing the discharge of acid pickling wastes or concentrated plating solutions, whether neutralized or not, which are capable of causing any obstruction, damage, or corrosion in the sewage utility.

(l) Any waters containing suspended solids of such character and quantity that unusual provisions, attention, or expense is required to handle the materials at the sewage treatment plant.

(m) Any noxious or malodorous gas or substance which either singly or by interaction with other wastes is capable of creating a public nuisance or hazard to life or preventing entry into sewers for their maintenance and repair.

(n) Any toxic radioactive isotopes having a half-life of more than 100 days, without a special permit issued by the Board.

(o) Any wastes that for a duration of 15 minutes have a concentration greater than five times that of normal sewage as measured by suspended solids and B.O.D. (Ord. 2858-1973) Penalty, see 10.99