(A) Discharges of the following substances shall be limited to concentrations or quantities which will not harm the wastewater facility, streams, soils, vegetation, or ground water and will not otherwise create a hazard or nuisance. The authorized representative may set limitations lower than the prohibition limits outlined below.
(B) Consideration will be given to such factors as the quantity of waste in relation to flows and velocities, materials of construction, the city’s NPDES and SDS permits, capacity of the treatment plant, degree of treatability of wastes, and other pertinent factors:
(1) Wastewater having a temperature greater than 150°F (65.6°C) or causing, individually or in combination with other wastewater, the influent at the treatment facilities to have a temperature exceeding 104°F (40°C) or having heat in amounts which will be detrimental to biological activity in the treatment facilities;
(2) Wastewater containing fats, wax, grease, or oils in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F (0°C and 65.6°C);
(3) A discharge of water or wastewater which in concentration or in quantity of flow exceeds for any period of duration longer than 15 minutes more than five times the average 24-hour concentration of flows during normal operation;
(4) Food wastes not properly shredded to such a degree that all particles will be carried freely under normal flow conditions with no particle greater than one-half inch in any dimension;
(5) Noxious or malodorous liquids, gases, or solids;
(6) Wastewater with objectionable color not removed in the treatment process;
(7) Wastewater containing inert suspended solids in such quantities that would cause disruption to the wastewater treatment facilities;
(8) Radioactive wastes or isotopes in concentrations that exceed limits established by applicable state and federal regulations;
(9) Wastewaters with BOD5 or suspended solids levels that require additional treatment, except as may be permitted by specific written agreement with the city subject to § 53.065; and
(10) Wastewater containing substances which cannot be treated to produce effluent quality required by the permit or causes a violation of any applicable local, state, or federal regulation.
(Prior Code, § 53.57) (Ord. 181, passed 8-10-1993)