§ 51.001  DEFINITIONS.
   For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
   BIOCHEMICAL OXYGEN DEMAND or BOD.  The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20°C, expressed in milligrams per liter.
   BUILDING SEWER.  The extension from the building drain to the public sewer or other place of disposal.
   COMBINED SEWER.  A sewer receiving both surface runoff and sewage.
   GARBAGE.  Solid wastes from the domestic and commercial preparation, cooking and dispensing of food and from the handling, storage and sale of produce.
   INDUSTRIAL WASTES.  The liquid wastes from industrial manufacturing processes, trade or business as distinct from sanitary sewage.
   INSPECTOR.  The person or persons duly authorized by the city, through its Common Council, to inspect and approve the installation of building sewers and their connection to the public sewer system.
   NATURAL OUTLET.  Any outlet into a watercourse, pond, ditch, lake or other body of surface or groundwater.
   NORMAL SANITARY SEWAGE.  Sewage containing less than 300 milligrams of suspended solids per liter of fluid and less than 300 milligrams of chemical oxygen demand concentration per liter of fluid.
   PERSON.  Any individual, firm, company, association, society, corporation or group.
   pH.  The logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.
   PROPERLY SHREDDED GARBAGE.  The wastes from the preparation, cooking and dispensing of food that have been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.
   SANITARY BUILDING DRAIN.  The part of the lowest horizontal piping of the sanitary drainage system inside the walls of any building which receives the discharge from soil or waste stacks and branches, and conveys the same to a point three feet outside the building walls where it connects with its respective building sewer.
   SANITARY SEWER.  A sewer which carries sewage and to which storm, surface and groundwaters are not intentionally admitted.
   SEWAGE.  A combination of the water-carried wastes from residences, business buildings, institutions and industrial establishments, together with such ground, surface and stormwaters as may be present.
   SEWAGE TREATMENT PLANT.  Any arrangement of devices and structures used for treating sewage.
   SEWAGE WORKS.  All facilities for collecting, pumping, treating and disposing of sewage.
   SEWER. A pipe or conduit for carrying sewage.
   SLUG.  Any discharge of water, sewage or industrial waste which, in concentration of any given constituent or in quantity of flow, exceeds for any period of duration longer than 15 minutes more than five times the average 24-hour concentration or flows during normal operation.
   STORM DRAIN or STORM SEWER.  A sewer which carries storm and surface waters and drainage, but excludes sewage and industrial wastes, other than unpolluted cooling water.
   SUPERINTENDENT.  The Superintendent of the municipal sewage works of the city, or his or her authorized deputy, agent or representative.
   SUSPENDED SOLIDS.  Solids that either float on the surface of, or are in suspension in water, sewage or other liquids, and which are removable by laboratory filtering.
   WATERCOURSE.  A channel in which a flow of water occurs, either continuously or intermittently.
(1989 Code, § 51.01)  (Ord. 6-1974, passed 7-15-1974)