The following definitions are applicable to this chapter:
AMMONIA NITROGEN (NH3-N)One of the oxidation states of nitrogen, in which nitrogen is combined with hydrogen in molecular form as NH
3 or in ionized form as NH
4. Quantitative determination of ammonia nitrogen shall be made in accordance with procedures set forth in "Standard Methods" or Ch. NR
149, Wis. Adm. Code.
BIOCHEMICAL OXYGEN DEMAND (BOD)The quantity of oxygen utilized in the biochemical oxidation of organic matter in five days at 20° C. expressed as milligrams per liter. Quantitative determination of BOD shall be made in accordance with procedures set forth in "Standard Methods."
BUILDING DRAINThat 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.
BUILDING SEWERThe extension from the building drain to the public sewer or other place of disposal beginning outside the inner face of the building wall.
COMPATIBLE POLLUTANTSBiochemical oxygen demand, suspended solids, phosphorus, ammonia, or pH, plus additional pollutants identified in the WPDES permit for the Village treatment works receiving the pollutant, if such works were designated to treat such additional pollutants to a substantial degree.
DOMESTIC WASTEWATERWastewater which contains 200 mg/l of BOD5 and 200 mg/l of suspended solids.
FLOATABLE OILOil, 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 of treatment system.
GARBAGEThe residue from the preparation, cooking and dispensing of food, and from the handling, storage and sale of food products and produce.
GROUND GARBAGEThe residue from the preparation, cooking and dispensing of food that has been shredded to such degree that all particulates will be no greater than 1/2 inch in any dimension and will be carried freely in suspension under normal flow conditions in sewers.
INCOMPATIBLE POLLUTANTS or WASTEWATERWastewater of such a strength that will adversely affect or disrupt the wastewater treatment processes of effluent quality or sludge quality if discharged to the sewerage system facility.
INDUSTRIAL WASTEThe wastewater from an industrial process, trade or business, as distinct from sanitary sewage, including cooling water and the discharge from sewage pretreatment facilities.
MAIN, SEWERThat portion of the underground sewage conveyance system that is connected by manholes and is capable of being cleaned by use of standard apparatus without entering into private property.
MAJOR CONTRIBUTING INDUSTRYA nongovernmental user of the publicly owned wastewater facilities which has a waste discharge equivalent to or more than 5,000 gallons per average workday of domestic wastewater in terms of flow, BOD or suspended solids, which has an average work day discharge flow greater than 5% of the average daily flow received at the wastewater treatment plant, which has a toxic pollutant in toxic amounts defined by Ch. NR
215, Wis. Adm. Code, or which has a major impact on the publicly owned treatment works either singly or in combination with other wastes when so as defined in writing by the Village.
MUNICIPAL WASTEWATERThe wastewater of a community. From the standpoint of source, 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 have inadvertently entered the sewerage system.
NATURAL OUTLETAny outlet, including storm sewers, into a watercourse, pond, ditch, lake or other body of surface water or groundwater.
PARTS PER MILLIONA weight-to-weight ratio; the parts per million value multiplied by the factor 8.34 shall be equivalent to pounds per million gallons of water.
PERSONAny and all persons, including any individual, firm, company, municipal or private corporation, association, society, institution, enterprise, governmental agency, or other entity.
pHThe logarithm of the reciprocal of the hydrogen ion concentration. The concentration is the weight of the hydrogen ions, in grams per liter of solution. Neutral water, for example, has a pH value of 7 and hydrogen ion concentration of 10-7.
SANITARY SEWAGEA combination of liquid and water-carried wastes discharged from toilets and/or sanitary plumbing facilities, together with such groundwaters, surface waters, and stormwaters as may have inadvertently entered the sewerage system.
SANITARY SEWERA sewer that carries liquid and water-carried wastes from residences, commercial buildings, industrial plants, and institutions, together with minor quantities of groundwaters, stormwaters and surface waters that are not admitted intentionally.
SEWAGEThe spent water of a community. The preferred term is "municipal wastewater."
SEWER SERVICE AREASThe areas presently served and anticipated to be served by a municipal wastewater collection system.
SEWER SERVICE CHARGEA service charge levied on users of the wastewater collection and treatment facilities for payment of use-related capital expenses as well as the operation and maintenance costs, including replacement, of said facilities.
SEWERAGE SYSTEMAll structures, equipment, manholes, conduits and pipes by which sewage is collected, treated and disposed of, except plumbing inside and in connection with buildings served and building sewers from buildings to street main.
SEWER SYSTEMThe common sanitary sewers within a sewerage system which are primarily installed to receive wastewaters directly from building sewers and which include service connection fittings designed for connection with those facilities. The facilities which convey wastewater from individual structures, from private property to the public sanitary sewer, or the equivalent, are specifically excluded from the definition of "sewerage collection system," except that pumping units and pressurized lines for individual structures or groups of structures may be included as part of a sewer system when such units are cost-effective and are owned and maintained by the sewerage system owner.
SHOCKAny 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 twenty-four-hour concentration of flows during normal operation and which adversely affects the system and/or performance of the wastewater treatment works.
SIGNIFICANT INDUSTRIAL USERA nongovernmental user which is required to file effluent reports for discharges made to the public sanitary sewer collection system by Ch. NR
101 Wis. Adm. Code (which includes, but is not limited to, any facility whose discharge is a volume greater than 10,000 gallons per day and contains one or more of the industrial wastes or toxic and hazardous substances defined in Ch. NR
101, Wis. Adm. Code, or whose discharge is less than 10,000 in gallons per day, but is subject to a pretreatment standard), or which has been notified in writing by the DNR that it is necessary to provide the agency with information concerning the concentration and quantity of pollutants discharged.
SLUGAny discharge of sewage or industrial wastewater, the concentration of any constituent of which or the quantity of flow which exceeds instantaneously more than five times the average twenty-four-hour concentration of flows of the user during normal operation. For industrial users, a more stringent definition of "slug" may be established.
STANDARD METHODSThe examination and analytical procedures set forth in the most recent edition of "Standard Methods for the Examination of Water, Sewage, and Industrial Wastes" published jointly by the American Public Health Association, the American Water Works Association, and the Water Pollution Control Federation.
STORMWATER RUNOFFThat portion of the rainfall that is collected and drained into storm sewers or which drains over the ground surface.
SUSPENDED SOLIDSSolids that either float on the surface of or are in suspension in water, wastewater or other liquids, and that are removable by laboratory filtering as prescribed in "Standard Methods" and referred to as nonfilterable residue.
WASTEWATERThe spent water of a community. From the standpoint of source, 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 but not intentionally admitted.
WASTEWATER FACILITIESThe structures, equipment and processes required to collect, carry away, store and treat domestic and industrial waste and dispose of the effluent and sludge.
WASTEWATER TREATMENT WORKSAn arrangement of devices and structures for treating wastewater, industrial wastes, and sludge. Sometimes used as synonymous with waste treatment.
WATERCOURSEA natural or artificial channel for the passage of water, either continuously or intermittently.