§ 52.025  DEFINITIONS.
   For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
   BOD (DENOTING BIOCHEMICAL OXYGEN DEMAND).  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 DRAIN.  That part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning five feet (1.5 meters) outside the inner face of the building wall.
   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.
   NATURAL OUTLET. Any outlet in watercourse, pond, ditch, lake, or other body of surface or groundwater.
   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 solutions.
   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 (1.27 centimeters) in any dimension.
   PUBLIC SEWER.  A sewer in which all owners of abutting properties have equal rights, and is controlled by public authority.
   SANITARY SEWER.  A sewer into 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 storm waters 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 (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 Public Works of the city, or his 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.
(`83 Code, § 17-501)