For the purpose of this chapter 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 parts per million by weight.
“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 outside the inner face of the building wall.
“BUILDING SEWER.” The extension from the building drain to the point of connection with the public sewer or other place of disposal.
“COMBINED SEWER.” A sewer receiving both surface runoff and sewage.
“GARBAGE.” Solid wastes from the preparation, cooking, and dispensing of food, and from the handling, storage, and sale of produce.
“INDUSTRIAL WASTES.” The liquid wastes from industrial or other technical processes.
“NATURAL OUTLET.” Any outlet into a watercourse, pond, ditch, lake, or other body of surface or groundwater.
“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 l/2 inch in any dimension.
“PUBLIC SEWER.” A sewer controlled by the city to which owners of the abutting properties may have access. In general, the public sewer shall include the main sewer in the street and the service branch to the curb or property line, or a main sewer upon private property and any sewers which are connected with the sewage system of the city to the extent of ownership by public authority.
“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 cannot be eliminated.
“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 SEWER” or “STORM DRAIN.” A sewer which carries storm and surface waters and drainage, but excludes sewage and polluted industrial wastes.
“SUPERINTENDENT.” The authorized director of the sewage works or his 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.
(Ord. 72.01, passed 3-9-70)