For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AUTHORITY. The Township of Spaulding, Saginaw County, Michigan.
BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen, expressed in milligrams per liter, utilized in the biochemical oxidation of organic matter under standard laboratory procedures in five days at 20°C.
BUILDING DRAIN. The 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 a building and conveys it to the building sewer beginning three feet outside the building wall.
(1) BUILDING DRAIN, SANITARY. A building drain which conveys sanitary and/or industrial sewage only.
(2) BUILDING DRAIN, STORM. A building drain which conveys storm water or other clear water drainage only.
BUILDING SEWER. The extension from the building drain to the public sewer or other place of disposal (also called HOUSE CONNECTION).
(1) BUILDING SEWER, SANITARY. A building sewer which conveys sanitary and/or industrial sewage only.
(2) BUILDING SEWER, STORM. A building sewer which conveys storm water or other clear water drainage only.
COMBINED SEWAGE. A combination of both sanitary and industrial wastewater and storm or surface water.
COMBINED SEWER. A sewer intended to receive both wastewater and storm or surface water.
COMMERCIAL USER. A user of the treatment works engaged in the purchase or sale of goods or services or the transaction of business.
COMPATIBLE POLLUTANT.
(1) Biochemical oxygen demand and suspended solids, pH and fecal coliform bacteria, plus additional pollutants identified in the NPDES permit if the treatment works was designed to treat such pollutants, and in fact does remove such pollutants to a substantial degree. The term SUBSTANTIAL DEGREE is not subject to precise definition, but generally contemplates removal in the order of 80% or greater. Minor incidental removals in the order of 10% to 30% are not considered SUBSTANTIAL.
(2) Examples of the additional pollutants which may be considered COMPATIBLE include:
(a) Chemical oxygen demand;
(b) Total organic carbon;
(c) Phosphorus and phosphorus compounds;
(d) Nitrogen and nitrogen compounds; and
(e) Fats, oils and greases of animal or vegetable origin (except as prohibited where these materials would interfere with the operation of the treatment works).
CONTROL MANHOLE. Consists of a structure built on a sewer service through which sewage passes and can be sampled and will permit flow measurements taken.
FECAL COLIFORM. Any of a number of organisms common to the intestinal tract of man and animals, whose presence in sanitary sewage is an indicator of pollution.
FLOATABLE OIL. Oil, fat or grease in a physical state, such that will separate by gravity from wastewater by treatment in a pretreatment facility approved by the township.
GARBAGE. Solid wastes from the domestic and commercial preparation, cooking and dispensing of food and from the commercial handling, storage and sale of produce.
GOVERNMENTAL USER. A federal, state or local governmental user of the treatment works which has an executive, legislative, judicial, administrative or regulatory activity.
INCOMPATIBLE POLLUTANT. Any pollutant that is not defined as a compatible pollutant, including nonbiodegradable dissolved solids.
INDUSTRIAL USER. Any sewer system user discharging a trade or process waste shall be considered an INDUSTRIAL USER.
INDUSTRIAL WASTE. Any solids, 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 resources. It does not include, and is distinct from, sanitary sewage generated by employees.
INFILTRATION. The water entering a sewer system, including building drains and sewers, from the ground, through such means as, but not limited to, defective pipes, pipe joints, connections or manhole walls. (INFILTRATION does not include, and is distinguished from, inflow).
INFILTRATION/INFLOW. The total quantity of water from both infiltration and inflow without distinguishing the source.
INFLOW. The water discharged into a sewer system, including building drains and sewers, from such sources as, but not limited to, roof leaders, cellars, yards and area drains, foundation drains, unpolluted cooling water discharges, drains from springs and swampy areas, manhole covers, cross- connection from storm sewers and combined sewers, catchbasins, storm waters, surface runoff, street wash waters or drainage. (INFLOW does not include, and is distinguished from, infiltration.)
INSTITUTIONAL USER. A user of the treatment works involved in a social, charitable, religious, educational or other special purpose activity.
MAJOR CONTRIBUTING INDUSTRY. An industry that shall meet one or more of the following conditions:
(1) Has a flow of 50,000 gallons or more per average work day;
(2) Has a flow greater than 5% of the flow carried by the municipal system receiving the wastes;
(3) Has in its waste a toxic pollutant in toxic amounts as defined in standards issued under § 307(a) of the Clean Water Act, being 33 U.S.C. § 1317(a), (Public Law No. 92-500); or
(4) Has a significant impact, either singly or in combination with other contributing industries, on a treatment works or on the quality of effluent from that treatment works.
MAY. Is permissive.
NATURAL OUTLET. Any outlet, including storm sewers and combined sewer overflows, into a watercourse, pond, ditch, lake or other body of surface or ground water.
NORMAL DOMESTIC SEWAGE. Sewage resulting from a normal household with a flow of 333 gallons per day and containing 0.57 pounds per day of BOD and suspended solids.
NPDES PERMIT. A permit issued under the national pollutant discharge elimination system for discharge of wastewaters to the navigable waters of the United States pursuant to § 402 of the Clean Water Act, being 33 U.S.C. § 1342 (Public Law No. 92-500).
PERSON. Any individual, firm, company, municipality, association, society, corporation or group discharging any wastewater to the treatment works.
pH. The reciprocal of the logarithm of the hydrogen ion concentration. The concentration is the weight of hydrogen ions, in grams per liter of solution.
PRETREATMENT. The treatment of industrial sewage from privately owned industrial sources prior to introduction into a public treatment works.
PRIVATE SEWER. A sewer which is not owned by the township.
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 flow conditions, normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.
PUBLIC SEWER. A sewer which is owned and controlled by the township and will consist of the following components:
(1) COLLECTOR SEWER. A sewer whose primary purpose is to collect wastewater from individual point source discharges.
(2) FORCEMAIN. A pipe in which wastewater is carried under pressure.
(3) INTERCEPTOR SEWER. A sewer whose primary purpose is to convey wastewaters from collector sewers to the sewage treatment plant.
(4) PUMPING STATION. A station positioned in the public sewer system at which wastewater is pumped to a higher level.
RESIDENTIAL USER. A user of a treatment works whose premises or building is used primarily as a domicile for one or more persons and whose wastes originate from normal living activities of its inhabitants.
SANITARY SEWER. A sewer which carries sanitary and industrial wastes only, and to which storm, surface and ground water are not intentionally or legally admitted.
SEWAGE. The combination of liquid and solid wastes from residences, commercial buildings, industrial plants, institutions and governmental edifices (including polluted cooling water). The three most common types of sewage are as follows.
(1) COMBINED SEWAGE. A combination of wastes including sanitary sewage, industrial sewage and intentionally admitted storm water, infiltration and inflow.
(2) INDUSTRIAL SEWAGE. A combination of liquid and solid waste discharged from any industrial establishment, resulting from any trade or process carried on in that establishment. (This shall include the wastes from pretreatment facilities and polluted cooling water but is separate and distinct from sanitary sewage from employees).
(3) SANITARY SEWAGE. The combination of liquids and solid waste discharged from toilet and other sanitary plumbing facilities resulting from human habitation.
SHALL. Is mandatory.
SLUG. Any discharge of sewage or wastewater which, in concentration of any given constituent or in quantity of flow, exceeds, for any period of duration longer than 30 minutes, more than three times the average 24-hour concentration of flows during normal operation and shall adversely affect the treatment works.
STORM SEWER. A sewer for conveying storm water, ground water or unpolluted water from any other source and to which sewage is not intentionally admitted.
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.
TOTAL SOLIDS. The sum of suspended and dissolved solids.
TOXIC AMOUNTS. Concentrations of any pollutant or combination of pollutants, which upon exposure to or assimilation into any organism, will cause adverse effects, such as cancer, genetic mutations and physiological manifestations, as defined in standards issued pursuant to § 307(a) of the Clean Water Act, being 33 U.S.C. § 1317(a) (Public Law No. 92-500).
TREATMENT WORKS. All devices and systems used in the storage, treatment, recycling and reclamation of wastewater including intercepting sewers, outfall sewers and wastewater collection systems.
UNPOLLUTED WATER. Water of quality equal to or better than the effluent criteria in effect, or water than would not cause violation of receiving water quality standards and would not be benefitted by discharge to the treatment works.
WASTEWATER. Water polluted with sanitary sewage, industrial sewage, combined sewage or any other substance which when contained in wastewater must be removed or diluted to a substantial degree before such wastewater can be reclaimed for discharge to a watercourse or reused.
WATERCOURSE. A natural or artificial channel for the passage of water either continuously or intermittently.
(Prior Code, § 25.301) (Ord. 030888, passed 3-8-1988)