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A. Nondomestic Wastewater: It is unlawful to discharge nondomestic wastewater to the city sanitary sewers, except as authorized by the city in accordance with the provisions of this chapter. Domestic wastewater shall not exceed two hundred fifty milligrams per liter (250 mg/l) biochemical oxygen demand (BOD) concentration or two hundred fifty milligrams per liter (250 mg/l) total suspended solids (TSS).
B. Storm Water; Swimming Pools: 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 chapter. The water from an air conditioning or cooling unit shall in no event exceed one-tenth (0.1) 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 (2) 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. Injurious Substances, Materials: No person shall discharge, or cause to be discharged, into any city sanitary sewer any of the following described substances, materials, waters, or wastes:
1. Any liquid or vapor having a temperature higher than one hundred fifty degrees Fahrenheit (150°F) (65°C), or which would cause the wastewater treatment plant influent to exceed one hundred four degrees Fahrenheit (104°F) (40°C);
2. Any water or wastes which contain wax, grease, oil, plastic, or other substance that will solidify or become discernibly viscous at temperatures between thirty two degrees (32°) and one hundred fifty degrees Fahrenheit (150°F);
3. Flammable or explosive liquid, solids or gas, such as gasoline, kerosene, benzine, naphtha, 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 with 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. Certain Waters And Wastes Restricted: 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 city sanitary sewers containing:
1. Free or emulsified oil and grease exceeding on analysis an average of one hundred milligrams per liter (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 city, it appears probable that such wastes:
a. Can deposit grease or oil in the sanitary sewer lines in such 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;
d. Can have deleterious effects on the treatment process due to the excessive quantities.
All businesses, institutions, or organizations (not residences) that cook with grease must install a grease trap that complies with the latest BOCA building code.
2. Acids or alkalies which attack or corrode sanitary sewers or wastewater disposal structures or have a pH value lower than 6.0 or higher than 10.0.
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 stream to which the effluent of wastewater treatment facility discharges, or exceeding the following, the analytical results to be expressed in terms of the elements indicated:
Toxic Substance ug/l
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 city shall impose separate or special concentration limits upon the discharge to ensure:
a. That the concentrations 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; or
b. That in no instance will be combined 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 milligrams per liter (2 mg/l) as CN in the wastes from any outlet into the public sanitary sewers.
5. Radioactive materials exceeding the existing standards of the Oklahoma 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 taste 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. (Ord. 576, 7-6-1998, eff. 7-6-1998)