(A) 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 City Administrator, that the 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 his or her opinion as to the acceptability of these wastes, the City Administrator will give consideration to factors such 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:
(1) Any liquid or vapor having a temperature higher than 150°F (65°C);
(2) Any water or wastes 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 (0º and 65°C);
(3) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor three-fourths horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the City Administrator;
(4) Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not;
(5) Any water or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to the degree that any material received in the composite sewage at the sewage treatment works exceeds the limits established by the City Administrator for the materials;
(6) Any waters or wastes containing phenols or other taste- or odor-producing substances, in concentrations exceeding limits which may be established by the City Administrator as necessary, after treatment of the composite sewage, to meet the requirements of state, federal, or other public agencies of jurisdiction for discharge to the receiving waters;
(7) Any radioactive wastes or isotopes of a half-life or concentration as may exceed limits established by the City Administrator in compliance with applicable state or federal regulations;
(8) Any waters of wastes having a pH in excess of (9.5);
(9) Materials which exert or cause:
(a) 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);
(b) Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions);
(c) Unusual BOD, chemical oxygen demand, or chlorine requirements in quantities so as to constitute a significant load on the sewage treatment works; and
(d) Unusual volume of flow or concentration of wastes constituting slugs as defined herein.
(10) 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 the degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters;
(11) Any waters or wastes having any provisions of division (A)(1)(a), (b), or (c) below shall be subject to the review of the City Administrator:
(a) A five-day BOD greater than 300 parts per million by weight;
(b) Containing more than 350 parts per million by weight of suspended solids; or
(c) Having an average daily flow greater than 2% of the average sewage flow of the city.
(12) The owner shall provide, at his or her expense, preliminary treatment as may be necessary to:
(a) Reduce the biochemical oxygen demand to 300 parts per million by weight;
(b) Reduce the suspended solids to 350 parts per million by weight; or
(c) Control the quantities and rates of discharge of the waters or wastes.
(B) Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the City Administrator, and no construction of facilities shall be commenced until the approvals are obtained in writing.
(Prior Code, § 3-233) (Ord. 800, passed 10-18-2005)