(A) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer.
(B) Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined storm sewers or to a natural outlet approved by the City Manager and/or the SWRC. Industrial cooling water or unpolluted process waters may be discharged, upon approval of the City Manager, to a storm sewer or natural outlet.
(C) Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
(1) Any liquid or vapor having a temperature higher than 140° F.
(2) Any water or waste which may contain more than 100 parts per million by weight of fat, oil, or grease.
(3) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
(4) Any garbage which has not been properly shredded.
(5) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, wood pulp, paunch manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works.
(6) Any waters or wastes having a pH lower than 5.5 or higher than 10.5 or having any other corrosive property capable of causing damage or hazards to the structures, equipment, and personnel of the sewage works.
(7) Any waters or wastes containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, fish or aquatic life, or create any hazard in the receiving waters of the sewage treatment plant.
(8) Any waters or wastes containing suspended solids of such character and quantity.
(9) Any noxious or malodorous gas or substance capable of creating a public nuisance.
(D) Grease, oil and sand interceptors shall be provided when they are required by the Plumbing Code and when, in the opinion of the City Manager and/or the SWRC, they are necessary for the proper handling of liquid wastes containing grease, in excessive amounts, or any inflammable wastes, sand, or harmful ingredients except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the City Manager and/or the SWRC and shall be located as to be readily accessible for cleaning and inspection. Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be substantially constructed, watertight, and equipped with easily removable covers which when bolted in place shall be gas-tight and watertight.
(E) Where installed, all grease, oil and sand interceptors shall be maintained by the owner at his expense, in continuously efficient operation at all times.
(F) (1) The admission into public sewers of any water or wastes having:
(a) A five day BOD greater than 300 parts per trillion by weight; or
(b) Containing any quantity of substances having the characteristics described in § 51.05(C); or
(c) Having a daily average flow greater than 2% of the average daily sewage flow of the city;
shall be subject to the review and approval of the Commission of the city and/or SWRC.
(2) Where necessary in the opinion of the Commission and/or the SWRC, the owner shall provide, at his expense, such preliminary treatment as may be necessary to:
(a) Reduce the BOD to 300 parts per million and the suspended solids to 350 parts per million by weight; or
(b) Reduce objectionable characteristics or constituents to within the maximum limits provided for in § 51.05(C); or
(c) Control the quantities and rates of discharge of such water and wastes.
(3) Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for approval of the Commission and of the SWRC of the state and no construction of such facilities shall be commenced until said approvals are obtained in writing.
(G) Where preliminary treatment facilities are provided for any waters or wastes, it shall be maintained in satisfactory and effective operation by the owner at his expense.
(H) When required by the City Plumbing Code, City Commission, or the SWRC, the owner of any property served by a building sewer carrying industrial wastes shall install a suitable control manhole in the building sewer to facilitate observation, sampling, and measurement of wastes. Such manhole, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the City Commission. The manhole shall be installed by the owner at his expense and shall be maintained by him so as to be safe and accessible at all times.
(I) All measurements, tests, and analysis of the characteristics of waters and wastes to which reference is made in §§ 51.05(C) and (F), shall be determined in accordance with standard methods for the examination of water and sewage and shall be determined at the control manhole provided for in § 51.05(H), or upon suitable sample taken at said control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected.
(J) No statement contained in this section shall be construed as preventing any special agreement or arrangement made between the city and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the city for treatment, subject to the payment therefore, by the industrial concern.
(Ord. 12.2, passed 12-1-56; Am. Ord. passed 1-13-82)