(A) No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water or unpolluted industrial process water to any sanitary sewer.
(B) Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm sewers, or to a natural outlet approved by the Superintendent. Industrial cooling water or unpolluted process water may be discharged, upon approval of the Superintendent, 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 water or wastes to any public sewers:
(1) Any liquid or vapor having a temperature higher than 150°C;
(2) Any gasoline, grease, oils, paint, benzine, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
(3) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure or any other solid or viscous substance capable of causing obstructions to the flow in sewers or other interference with the proper operation of the sewer works;
(4) 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 or create any hazard in the receiving waters of the sewage treatment plant;
(5) Any waters or wastes having a pH lower than 5.5 or higher than 9.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works;
(6) Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such material at the sewage treatment plant; and/or
(7) Any noxious or malodorous gas or substance capable of creating a public nuisance, including the contents of septic tanks and cesspools, without written consent of the Superintendent.
(D) Grease, oil and sand interceptors shall be provided when in the opinion of the Superintendent, they are necessary for the proper handling of liquid wastes containing grease in excessive amount; or any flammable wastes, sand and other harmful ingredients; except that such interceptors shall not be required for private living quarters. All interceptors shall be of a type and capacity approved by the Superintendent, and shall be located so as to be readily and easily accessible for cleaning and inspection, and shall be maintained by the owner, at his or her expense, in continuously efficient operation at all times.
(E) (1) The admission into the public sewers of any waters or wastes having any of the following shall be subject to the review and approval of the Superintendent:
(a) A one-day biochemical oxygen demand greater than 300 milligrams per liter;
(b) Containing any quantity of substances having the characteristics described in § 51.01;
(c) Containing more than 350 milligrams per liter of suspended solids; or
(d) Having an average daily flow greater than 2% of the average daily sewage flow of the city.
(2) Where necessary in the opinion of the Superintendent, the owner shall provide, at his or her expense, such preliminary treatment as may be necessary. Plans, specifications and any other pertinent information relating to the proposed preliminary treatment facilities shall be submitted for the approval of the Superintendent and of the State Department of Environmental Quality, and no construction of such facilities shall be commenced until said approvals are obtained in writing.
(F) When required by the Superintendent, 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 the wastes. Such manhole, when required, shall be accessible at all times.
(G) Where preliminary treatment facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his or her expense.
(H) All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made above shall be determined in accordance with standard methods for the examination of water and sewage, and shall be determined at the 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.
(I) No statement contained in this section shall be construed as preventing any special agreement or arrangement 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 payment therefor by the industrial concern.
(Ord. 392, passed 10-8-2007) Penalty, see § 51.99