For the purpose of this chapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BIOCHEMICAL OXYGEN DEMAND or B.O.D. The quantity of oxygen utilized in biochemical oxidation of organic matter under standard laboratory procedures in five days at 20° C., expressed in milligrams per liter.
BUILDING DRAIN. That part of the lowest 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 or other approved point of discharge, beginning five feet (one and one-half 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.
EFFLUENT CRITERIA. Defined in any applicable NPDES permit.
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. Solid wastes from the domestic and commercial preparation, cooking, and dispensing of food, and from the handling, storage, and sale of produce.
INDUSTRIAL WASTE. Any solid, liquid, or gaseous substance discharged, permitted to flow, or escaping from any industrial, manufacturing, commercial, or business establishment or process or from the development, recovery, or processing of any natural resource, as distinct from sanitary sewage.
MILLIGRAMS PER LITER. A unit of the concentration of water or wastewater constituent. It is 0.001 g of the constituent in 1,000 ml of water. It has replaced the unit formerly used commonly, parts per million, to which it is approximately equivalent, in reporting the results of water and wastewater analysis.
NATURAL OUTLET. Any outlet into a watercourse, pond, ditch, lake, or other body of surface water or groundwater.
PERSON. Any and all persons, natural or artificial, including any individual, firm, company, municipal or private corporation, association, society, institution, enterprise, governmental agency, or other entity.
pH. The logarithm (base 10) of the reciprocal of the hydrogen-ion concentration expressed by one of the procedures outlined in Standard Methods.
POPULATION EQUIVALENT. A term used to evaluate the impact of industrial or other waste on a treatment works or stream. One POPULATION EQUIVALENT is 100 gallons of sewage per day, containing .17 pounds of B.O.D. or .22 pounds of suspended solids.
P.P.M. Parts per million by weight.
PRETREATMENT. The treatment of wastewaters from sources before introduction into the sewerage works.
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 provided by or subject to the jurisdiction of the village. It shall also include sewers within or outside the village boundaries that serve one or more persons and ultimately discharge into the village sewers, even though those sewers may not have been constructed with village funds.
SANITARY SEWER. A sewer that conveys sewage or industrial wastes or a combination of both, and into which stormwaters, surface waters, and groundwaters or unpolluted industrial wastes are not intentionally admitted.
SEWAGE. Used interchangeably with WASTEWATER.
SEWER. A pipe or conduit for conveying sewage or any other waste liquids, including stormwater, surface water, and groundwater drainage.
SEWERAGE WORKS. The system of sewers and appurtenances for the collection, transportation, pumping, and treatment of wastewater and discharge of effluent.
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 of flows during normal operation.
STANDARD METHODS. The examination and analytical procedures set forth in the most recent edition of Standard Methods for the Examination of Water and Wastewater, published jointly by the American Public Health Association, the American Water Works Association, and the Water Pollution Control Federation.
STORM SEWER. A sewer that carries stormwater, surface water, and groundwater drainage but excludes sewage and industrial wastes other than unpolluted cooling water.
STORMWATER RUNOFF. That portion of the precipitation that is drained into the sewers.
SUSPENDED SOLIDS. Solids that either float on the surface of, or are in suspension in water, sewage, or industrial waste, and which are removable by a laboratory filtration device. Quantitative determination of SUSPENDED SOLIDS shall be made in accordance with procedures set forth in Standard Methods.
UNPOLLUTED WATER. 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. From this standpoint, it may be a combination of the liquid and water-carried wastes from residences, commercial buildings, industrial plants, and institutions, together with any groundwater, surface water, and stormwater that may be present.
WASTEWATER FACILITIES. Synonymous with SEWERAGE WORKS.
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 or POLLUTION CONTROL PLANT.
WATER QUALITY STANDARDS. Defined in the Water Pollution Regulations of Illinois.
WATERCOURSE. A channel in which a flow of water occurs, either continuously or intermittently.