§ 15-401  DEFINITIONS.
   For the purpose of this article, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
   B.O.D. (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 parts per million by weight.
   BUILDING DRAIN. The part of the lowest horizontal piping of a drainage system that 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 outside the innerface of the building wall.
   BUILDING SEWER. The extension from the building drain to the public sewer or other place of disposal.
   COMBINED SEWERS. Sewers receiving both surface runoff and sewage are not permitted.
   INDIVIDUAL DOMESTIC. Any single-family residence, commercial business, office, institution, school, church or public entity having an individual direct or indirect connection to the wastewater facilities of the city and on individual city or private water service meter, or connection to any such water service.
   INDUSTRIAL. Any industrial business engaged in the manufacturing or processing of one or more products, and in which wastewaters are produced from such manufacturing or processing and said wastewaters are discharged directly or indirectly to the wastewater facilities of the city.
   MULTI-DOMESTIC. Any multi-family residence, apartment or mobile home and any commercial business, office, institution, school, church or public entity having a direct or indirect connection to the wastewater facilities of the city and not having an individual water service meter but is served with city or private metered water by the owner of the property on which it is located.
   NORMAL WASTEWATER. The strength of normal wastewater shall be considered within the following ranges:
      (1)   A five day biochemical oxygen demand of 300 milligrams per liter or less;
      (2)   A suspended solid concentration of 350 milligrams or less; and
      (3)   Hydrogen ion concentration of 5.0 to 9.0.
   pH. The logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.
   PUBLIC SEWER. A sewer in which all owners of abutting properties have equal rights and is controlled by public authority.
   SANITARY SEWER. A sewer that 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.
   SEWER. A pipe or conduit for carrying sewage.
   STORM SEWER or STORM DRAIN. A sewer that carries storm and surface waters and drainage, but excludes sewage and polluted industrial wastes.
   SUPERINTENDENT. The Superintendent 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.
   USER. Any person as defined in § 1-102, including an institution, governmental agency or political subdivision producing wastewater requiring processing and treatment to remove pollutants and having premises connected to the wastewater facilities.
   WASTEWATER. Sewage, the combination of liquids and water-carried wastes from residences, commercial and industrial buildings, institutions, governmental agencies, together with any ground, surface or stormwater that may be present.