For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20ºC, 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 sewer service line, beginning five feet outside the inner face of the building wall.
BUILDING INSPECTOR. The inspector of buildings for the city or his or her duly authorized agent or representative.
COMBINED SEWER. A sewer intended to receive both wastewater and storm or surface water.
EASEMENT. An acquired legal right for the specific use of land owned by others.
FLOATABLE OIL. Oil, fat, or grease in a physical state such that it will separate by gravity from wastewater by treatment in an approved pretreatment facility. Wastewater shall be considered free of floatable fat if it is properly pretreated and the wastewater does not interfere with the collection system.
GARBAGE. The animal and vegetable waste resulting from the handling, preparation, cooking, and serving of foods.
INDUSTRIAL WASTES. Any contributor to the city’s treatment works with an average daily waste volume greater than 10,000 gallons and a waste strength greater than or equal to 170 mg/l BOD and 185 mg/l suspended solids.
NATURAL OUTLET. Any outlet, including storm sewers and combined sewer overflows, into a watercourse, pond, ditch, lake, or other body of surface or groundwater.
pH. The logarithm of the reciprocal of the hydrogen ion concentration. The concentration is the weight of hydrogen ions, in grams, per liter of solution. Neutral water, for example, has a pH value of seven and a hydrogen ion concentration of 10-7.
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.
PUBLIC SEWER. A common sewer controlled by a governmental agency or public utility.
SANITARY SEWER. A sewer that carries liquid and water-carried wastes from residences, government and commercial buildings, industrial plants, and institutions together with minor quantities of ground, storm, and surface waters that are not admitted intentionally.
SEWER. A pipe or conduit that carries wastewater or drainage water.
SEWER SERVICE LINE. The extension from the building drain to the public sewer or other place of disposal.
SLUG. Any discharge of water or wastewater 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 and shall adversely affect the collection system and/or performance of the wastewater treatment works.
STORM DRAIN. A drain or sewer for conveying water, groundwater, subsurface water, or unpolluted water from any source.
SUPERINTENDENT. The Superintendent of Wastewater Treatment Works and Water Facilities of the city, or his or her authorized deputy, agent, or representative.
SUSPENDED SOLIDS (SS). 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.
TREATMENT WORKS. Any devices and systems for the storage and treatment of municipal, domestic, or industrial wastewater. These include intercepting sewers, outfall sewers, and their appurtenances; extension improvements, remodeling, and additions; and site acquisition of the land that will be an integral part of the treatment process; or any other method or system for preventing, abating, reducing, storing, treating, separating, or disposing of municipal waste or industrial waste, including waste in combined stormwater and sanitary sewer systems.
UNPOLLUTED WATER. The water of quality equal to or better than the effluent criteria in effect or water that would not cause violation of receiving water quality standards and would not be benefitted by discharge to the sanitary sewers and wastewater treatment facilities provided.
WASTEWATER. The spent water of a community.
WATERCOURSE. A natural or artificial channel for the passage of water either continuously or intermittently.
(Prior Code, § 52.01)