(A) All discharges shall be prohibited except those that meet the criteria for domestic wastewater. BOD concentration shall not exceed the maximum limit for average domestic wastewater of 250 mg/l or SS shall not exceed 250 mg/l.
(B) No person shall discharge, or cause to be discharged, any storm water, ground water, roof runoff, subsurface drainage or any water from down spouts, yard drains, yard fountains, and ponds, septic tanks, or lawn sprays into any sanitary sewer. Water from swimming pools, boiler drains, blow-off pipes or cooling water from various equipment, may be discharged into the sanitary sewer by an indirect connection whereby such discharge is cooled if required, and flows into the sanitary sewer at a rate not to exceed the capacity of the sanitary sewer provided the waste does not contain materials or substances in suspension or solution in violation of the limits prescribed by this subchapter; and provided further that the water from an air conditioning or cooling unit shall in no event exceed one-tenth gallon per minute per ton capacity of the unit. Dilution of any waste discharged to the sanitary sewer system is prohibited, whether accomplished by the combination of two or more waste streams by a person or the addition of other liquids solely for the purpose of diluting the quality of the waste discharge.
(C) No person shall discharge, or cause to be discharged, into any public sanitary sewer any of the following described substances, materials, waters, or wastes:
(1) Any liquid or vapor having a temperature higher than 150°F (65°C), of which would cause the wastewater treatment plant influent to exceed 104°F (40°C);
(2) Any water or wastes which contains wax, grease, oil, plastic, or other substances that will solidify or become discernibly viscous at temperatures between 32°F to 150°F;
(3) Flammable or explosive liquid, solids or gas, such as gasoline, kerosene, benzene, naptha, and other like substances;
(4) Solids or viscous substances in quantities capable of causing obstruction to the flow in sanitary sewers, or other interference with the proper operation of the sewage works, such as ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastic, wood, whole blood, paunch, manure, hair and fleshing entrails, lime slurry, lime residue, slops, chemical residues, paint residues, fiberglass, or bulk solids;
(5) Any garbage that has not been properly comminuted or shredded; or
(6) Any noxious or malodorous substance which can form a gas, which either singly or by interaction which other wastes, is capable of causing objectionable odors or hazards to life and property, which forms solids in concentrations exceeding limits established herein or creates any other condition deleterious to structures or treatment processes; or requires unusual facilities, attention, or expense to handle such materials.
(D) Except in quantities, or concentrations, or with provisions as stipulated herein, it shall be unlawful for any person, corporation, or individual to discharge waters or wastes to the public sanitary sewers containing:
(1) Free or emulsified oil and grease exceeding on analysis an average of 100 mg/l (834 pounds per million gallons) of either or both or combinations of free or emulsified oil and grease, if, in the opinion of the Superintendent, it appears probable that such wastes:
(a) Can deposit grease or oil in the sanitary sewer lines in such a manner as to clog the sanitary sewers;
(b) Can overload the discharge’s skimming and grease handling equipment;
(c) Are not amenable to biological oxidation and will therefore pass to the receiving waters without being affected by normal wastewater treatment processes; or
(d) Can have deleterious effects on the treatment process due to the excessive quantities.
(2) Acids or alkalies which attack or corrode sanitary sewers or wastewater disposal structures or have a pH value lower than 5.0 or higher than 12.5;
(3) Salts of the heavy metals, in solution or suspension, in concentrations, toxic to biological wastewater treatment processes, or adversely affect sludge digestion or any other biochemical, biological, or other wastewater treatment process, or to the biota of the receiving steam to which the effluent of wastewater treatment facility discharges, or exceeding the following from the Technically Based Local Limits (TBLL) Study approved by ODEQ June 2014. The analytical results to be expressed in terms of the elements indicated:
Toxic Substance mg/l
Cadmium 0.54
Chromium 2.77
Copper 3.38
Lead 0.69
Mercury 0.26
Nickel 3.98
Zinc 2.61
or other elements which will damage collection facilities or are detrimental to treatment processes or are detrimental to the biota of the receiving stream to which the effluent of the wastewater treatment facility discharges. When the volume of a single toxic industrial waste discharge, or the combined toxic industrial waste discharge of a group of industries within a single contributory area, is so large as to raise a question of the ultimate concentration of toxic substances entering a treatment plant or a receiving stream, the Superintendent shall impose separate or special concentration limits upon the discharge to insure:
(a) That the concentration in wastewater of any toxic substances shall not exceed those concentrations in the influent of any wastewater treatment plant toxic to biological wastewater treatment processes, or adversely affect sludge digestion, or sludge quality, or any biochemical, biological or other wastewater treatment process; and
(b) That in no instance will be binned concentrations of any toxic substances in the effluent of any wastewater treatment plant exceed the discharge stream limitations as published by the state regulatory agency;
(4) Cyanides or cyanogen compounds capable of liberating hydrocyanic gas on acidification in excess of two mg/l as CN in the wastes from any outlet into the public sanitary sewers;
(5) Radioactive materials exceeding the existing standards of the State Department of Health, or unless they comply with the Atomic Energy Commission of 1954 (68 O.D. 919 as amended and Part 20, Subpart D-Waste Disposal, Section 20.303, of the regulations issued by the Atomic Energy Commission, or amendments thereto);
(6) Any wastewater containing phenols or other waste producing substances in such concentrations as to produce odor or taste in the effluent as to affect the taste and odor of the receiving waters;
(7) Materials which exert or cause:
(a) Unusual concentrations of solids or composition, as for example in total solids of inert nature (such as Fuller's Earth) or in total dissolved solids (such as sodium chloride, calcium chloride, or sodium sulfate);
(b) Excessive discoloration;
(c) Unusual biochemical oxygen demand or an immediate oxygen demand;
(d) High hydrogen sulfide content; or
(e) Unusual flow and concentration;
(8) Toxic substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable to treatment only to such degree that the wastewater treatment plant cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters without pretreating to a concentration acceptable to the city. When wastewater containing any of the aforementioned materials is discharged into the sanitary sewer and such wastes are not properly pretreated or otherwise corrected, the Superintendent may:
(a) Reject the wastes and terminate the service to the sanitary sewer;
(b) Require control of the quantities and rates of discharge of such wastes with flow regulating devices; or
(c) Require payment of surcharges for excessive cost of treatment provided such wastes are amenable to treatment by existing wastewater treatment plant facilities; and
(9) Except where expressly authorized by the Superintendent to do so by an applicable categorical pretreatment standard, no industrial user shall ever increase the use of process water or, in any other way, attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with ordinance discharge limitation.
(E) It is unlawful to discharge wastewater to the public sanitary sewer except as authorized by the Superintendent in accordance with the provisions of this subchapter. Upon promulgation of the Federal Categorical Pretreatment Standards for a particular industrial subcategory, if the discharge limitations defined in that regulation are more stringent than imposed under this subchapter, the categorical limitation shall govern.
(F) After the effective date of this subchapter, no industrial user shall discharge wastewater to the public sanitary sewer without a valid wastewater discharge permit issued by the Superintendent. All industrial users proposing to connect to or to discharge sewage, industrial waste, and other waste to the public sanitary sewer shall obtain a wastewater discharge permit before connecting to or discharging to the public sanitary sewer.
(`83 Code, § 17-504) (Ord. 1015, passed 4-1-85; Am. Ord. 2015-22, passed 10-5-15) Penalty, see § 52.999