For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
B.O.D. Denoting biochemical oxygen demand, shall mean the quantity of oxygen utilized in the biochemical oxidation of organic matter by Standard Methods procedure in 5 days at 20°C expressed in milligrams per liter (mg/l).
C.O.D. Denoting chemical oxygen demand, is a measure of the oxygen-consuming capacity of organic and inorganic matter present in wastewater as milligrams per liter (mg/1).
GARBAGE. Solid wastes from the preparation, cooking, and dispensing of food, and from the handling, storing, and sale of produce.
INDUSTRIAL LIQUID WASTES. All waterborne solids, liquids, or gaseous wastes resulting from any industrial, manufacturing, or food processing operation or process, or from the development of any natural resource, or any mixture of these with water or domestic sewage as distinct from normal domestic sewage. Industrial manufacturing processes shall include, but are not limited to, ordinance and accessories; food and allied products; tobacco manufacturers; textile mill products; apparel and other finished products made from fabrics and similar materials; lumber and wood products, except furniture; furniture and fixtures; printing, publishing, and allied industries; chemicals and allied products; petroleum refining and related industries; rubber and miscellaneous plastics products; leather and leather products; stone, clay, glass, and concrete products; primary metal industries; fabricated metal products, except ordinance; machinery and transportation equipment; machinery, except electrical; electrical machinery, equipment, and, supplies; transportation equipment; professional, scientific, and controlling instruments; photographic and optical goods; watches and clocks; miscellaneous manufacturing industries.
INTERFERENCE WITH ANY WASTEWATER FACILITY. Any condition or combination of conditions which cause degradation of the operational efficiency of a wastewater facility.
NORMAL DOMESTIC WASTEWATER. Waterborne wastes normally discharging from the sanitary conveniences of buildings, including apartment houses and hotels, office buildings, factories, and institutions, free from storm surface water and industrial wastes. NORMAL DOMESTIC WASTEWATER shall mean “normal” for the city.
pH. The logarithm (base 10) of the reciprocal of the hydrogen ion concentration of a solution.
PUBLIC SEWER. A sewer in which all owners of abutting properties shall have equal rights, and is controlled by public authority.
SANITARY SEWER. The public sewer portion of a wastewater facility which transports wastewater and to which storm, surface, and ground water are not intentionally admitted.
SETTLEABLE SOLIDS. Those solids which settle during a preselected period of time as expressed in milliliters per liter of sample.
STANDARD METHODS. The laboratory procedures set forth in the latest edition, at the time of analysis, of “Standard Methods for the Examination of Water and Wastewater,” as prepared, approved, and published jointly by the “
STORM SEWER. A sewer which carries storm and surface waters and drainage, but excludes wastewater and polluted industrial wastes.
TRAP. A device for retaining sand, silt, grit mineral material, petroleum solvent, grease, or oil by gravity differential separation from wastewater and of a design and capacity approved by the city.
UNPOLLUTED PROCESS WATER. Any water or waste containing none of the following free or emulsified grease or oil; acid or alkali; phenols or other substances imparting taste and odor to receiving water; toxic substances in suspension, colloidal state, or solution; and noxious or odorous gases.
WASTEWATER. The used water of a community. The used water may be a combination of the liquid and waterborne wastes from residences, commercial buildings, industrial plants, and institutions.
WASTEWATER FACILITIES. The structures, equipment, and processes required to collect, transport, and treat domestic industrial wastes and dispose of the effluent.
WASTEWATER TREATMENT WORKS. An arrangement of devices and structures for treating wastewater, industrial wastes, and sludge. Sometimes used as synonymous with waste treatment plant or wastewater treatment plant.
(1981 Code, § 28-162) (Ord. 605, passed 7-11-1972)