313.13  PUBLIC SEWER USE REGULATIONS.
   (a)   No person shall discharge any sanitary sewage or industrial waste into any natural outlet, or into any septic tank, cesspool, privy or privy vault, or into any other facility intended or used for the disposal of sewage, except into a public sewer in accordance with the provisions of this chapter.
   (b)   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.
   (c)   Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers, or to a natural outlet approved by the Director of Public Service.  Industrial cooling water or unpolluted process waters may be discharged upon approval of the Director to a storm sewer or a natural outlet.
   (d)   No person shall discharge or cause to be discharged any of the following waste materials to any public sewer:
      (1)   Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
      (2)   Any garbage that has not been properly shredded.
      (3)   Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure or any other solid viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the Municipal waste works.
      (4)   Any noxious or malodorous gas or substance capable of creating a public nuisance.
 
   (e)   The admission of any industrial wastes containing critical characteristics such as: excessive temperatures, oils, fats or grease; pH lower than 5.5 or higher than 9.5; having other corrosive properties; toxic or poisonous ingredients; excessive suspended solids; cyanide, free acid or caustic alkaline solution; or any other constituent critical to municipal wastes collection and treatment, shall be subject to the review and approval of the Director.  When in the opinion of the Director, preliminary treatment or control of waste is necessary, suitable facilities shall be constructed according to plans approved by the Director.
 
   (f)   Grease, oil and sand interceptors shall be provided when, in the opinion of the Director, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts.  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 Director, and shall be located as to be readily and easily 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 of substantial construction, watertight and equipped with easily removable covers which when bolted in place shall be gastight and watertight.
 
   (g)   Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.
 
   (h)   The admission into the public sewers of any waters or wastes having a five-day biochemical oxygen demand in excess of normal sewage shall be subject to the review and approval of the Director.  When necessary, in the opinion of the Director, such preliminary treatment as may be needed to control the quantities and rates of discharges or reduce objectionable characteristics or constituents shall be constructed according to plans approved by the Director.
 
   (i)   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 expense.
 
   (j)   When required by the Director, 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 accessibly and safely located, and shall be constructed in accordance with plans approved by the Director.  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.
 
   (k)   All measurements, test and analyses of the characteristics of waters and wastes to which reference is made in subsections (e) and (h) hereof 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 subsection (j) hereof, or upon suitable samples taken at such 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.
 
   (l)   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 of character may be accepted by the City for treatment, subject to payment therefor by the industrial concern.
(Ord. 1966-43.  Passed 6-6-66.)