For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
APPROVING AUTHORITY. The City Manager-Clerk or his or her duly authorized representative.
BOD or BIOCHEMICAL OXYGEN DEMAND. The quantity of oxygen utilized in the biochemical oxidation of organic matter in five days at 20°C, expressed as milligrams per liter (mg/l). Quantitative determination of BOD shall be made in accordance with procedures set forth in Standard Methods.
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 the building and conveys it to the building sewer.
BUILDING SEWER. A sanitary sewer which begins immediately outside of the foundation wall of any building or structure being served, and ends at its connection to the public sewer.
CHLORINE REQUIREMENT. The amount of chlorine, in mg/l, which must be added to sewage to produce a residual chlorine as specified in the National Pollutant Discharge Elimination System (NPDES) permit.
CITY. The City of Milaca.
COMBINED SEWER. A sewer intended to receive both wastewater and storm or surface water.
COMMERCIAL USER. Any place of business which discharges sanitary waste as distinct from industrial wastewater.
COMPATIBLE POLLUTANTS. BOD, suspended solids, nitrogen, pH, or fecal coliform bacteria, plus additional pollutants identified in the municipality’s NPDES permit for its wastewater treatment facility; provided that the facility is designed to treat these additional pollutants, and, in fact, does remove these pollutants to a substantial degree.
DEBT SERVICE CHARGE. The portion of the sewer service charge relating to the cost of retiring outstanding bond issues or other long term obligations of the wastewater collection and treatment facilities.
EASEMENT. An acquired legal right for the specified use of land owned by others.
FLOATABLE OIL. Oil, fat, or grease in a physical state so that it will separate by gravity from wastewater by treatment in an approved pretreatment facility. Wastewater shall be considered free of FLOATABLE OIL if it is properly pretreated and the wastewater does not interfere with the collection system.
GOVERNMENTAL USER. Users which are units, agencies, or instrumentalities of federal, state, or local government discharging normal domestic strength wastewater.
GROUND GARBAGE. The residue from the preparation, cooking, dispersing, handling, storage, and sale of food products and produce that has been shredded to a degree so that all particles will be carried freely in suspension under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.
INCOMPATIBLE POLLUTANTS. Wastewater with pollutants that will adversely affect the wastewater collection and treatment facilities or disrupt the quality of wastewater treatment if discharged to the wastewater collection and treatment facilities.
INDUSTRIAL USERS or INDUSTRIES.
(1) (a) Users that discharge into a publicly owned wastewater treatment works, liquid wastes resulting from the processes employed in industrial or manufacturing processes, or from the development of any natural resources.
(b) These are identified in the Standard Industrial Classification Manual, 1972, Office of Management and Budget, as amended and supplemental under one of the following divisions:
1. Division A: Agriculture, Forestry, and Fishing;
2. Division B: Mining;
3. Division D: Manufacturing;
4. Division E: Transportation, Communications, Electric, Gas, and Sanitary Sewers; and
5. Division I: Services.
(c) For the purpose of this definition, domestic waste shall be considered to have the following characteristics: BOD less than 300 mg/l; suspended solids (TSS) less than 340 mg/l.
(2) Any non-governmental user of a publicly owned treatment works which discharges wastewater to the treatment works which contains toxic pollutants or poisonous solids, liquids, or gases in sufficient quantity either singly or by interaction with other wastes, to contaminate the sludge of any municipal systems, or to injure or to interfere with any sewage treatment process, or which constitutes a hazard to humans or animals, creates a public nuisance, or creates any hazard in or has an adverse effect on the waters receiving any discharge from the treatment works.
INDUSTRIAL WASTE. Any solid, liquid, or gaseous substance discharged or escaping from any industrial or manufacturing process or from the development of any natural resources. The term includes any wastewater which is not sanitary sewage.
INFILTRATION. Water entering the sewage system (including building drains and pipes) from the ground through such means as defective pipes, pipe joints, connections, and manhole walls.
INFILTRATION/INFLOW or I/I. The total quantity of water from both infiltration and inflow.
INFLOW. Water other than wastewater that enters a sewer system (including building drains) from sources such as, but not limited to, roof leaders, cellar drains, yard and area drains, foundation drains, drains from springs and swampy areas, manhole covers, cross-connections from storm sewers, catch basins, surface runoff, street wash waters, or drainage.
INSTITUTIONAL USER. A user of the treatment facilities whose establishment is primarily engaged in activities of an educational, religious, social, cultural, charitable, or human services nature (e.g., churches, non-profit organizations, hospitals).
MAY. The act referred to is permissible.
MUNICIPALITY. The City of Milaca.
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT. A document issued by the State Pollution Control Agency which establishes effluent limitations and monitoring requirements for the municipal wastewater treatment facility. NPDES PERMIT No. MN0024147 and modifications thereof pertain to the municipal wastewater treatment facility.
NATURAL OUTLET. Any outlet, including storm sewers and combined sewer overflows, into a watercourse, pond, ditch, lake, or other body of surface water or groundwaters.
NORMAL DOMESTIC STRENGTH WASTEWATER. Wastewater with concentrations of BOD no greater than 300 mg/l and suspended solids (TSS) no greater than 340 mg/l.
OPERATION AND MAINTENANCE COSTS. All costs associated with the operation and maintenance of the wastewater collection and treatment facilities during the design or useful life, whichever is longer, of the wastewater treatment facilities, and at the level of performance for which the facilities were designated and constructed, including administration costs, all as determined from time to time by the municipality.
PERSON. Any and all persons, including any individual, firm, company, municipal or private corporation, association, society, institution, enterprise, governmental agency, or other entity.
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 7 and a hydrogen ion concentration of 10-7.
PUBLIC SEWER. Any publicly owned sewer, storm drain, sanitary sewer, or combined sewer.
REPLACEMENT COSTS. Expenditures for obtaining and installing equipment, accessories, or appurtenances which are necessary during the design or useful life, whichever is longer, of the wastewater treatment facility to maintain the capacity and performance for which the facilities were designed and constructed. REPLACEMENT COSTS are distinct from operation and maintenance costs but are included in the city’s user charges.
RESIDENTIAL USER. A user of the treatment facilities whose premises or building is used primarily as a residence for one or more persons, including dwelling units such as detached and semi-detached housing, apartments, and mobile homes; and which discharges primarily normal domestic strength sanitary wastes.
SANITARY SEWAGE. A combination of liquid and water-carried wastes discharged from toilets and/or sanitary plumbing facilities.
SANITARY SEWER. A sewer that carries sewage or wastewater from residences, commercial buildings, industrial plants, and institutions together with minor quantities of ground, storm, and surface waters which are not admitted intentionally.
SEWAGE. The spent water of a person or community. The preferred term is WASTEWATER.
SEWER. A pipe or conduit that carries wastewater or drainage water.
SEWER SERVICE CHARGE. A charge levied on users of the wastewater collection and treatment facilities for payment of operation and maintenance expenses, replacement costs, debt service costs, and other expenses or obligations of the facilities.
SHALL. The act referred to is mandatory.
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 of flows during normal operation, and/or adversely affects the wastewater collection system and/or performance of the wastewater treatment facility.
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 OR DRAIN. A drain or sewer for conveying water, groundwater, subsurface water, or unpolluted water from any source.
SUSPENDED SOLIDS or TSS. Total suspended matter that either floats on the surface of, or in suspension in, water, wastewater, or other liquids, and that is removable by laboratory filtering as prescribed in Standard Methods for the Examination of Water and Wastewater, and referred to as NONFILTERABLE RESIDUE.
UNPOLLUTED WATER. Water of quality equal to or better than the effluent of the wastewater treatment facilities 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.
USER CHARGE. A charge levied on users of the wastewater collection and treatment facilities for payment of operation and maintenance expenses and replacement costs of these facilities.
WASTEWATER. The spent water of a community or person. 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 storm water that may be present.
WASTEWATER COLLECTION FACILITIES or WASTEWATER COLLECTION SYSTEM. Structures and equipment required to collect and carry wastewater.
WASTEWATER TREATMENT FACILITY. An arrangement of devices and structures for treating wastewater and sludge. Also referred to as WASTEWATER TREATMENT PLANT.
(Ord. 303, passed 4-21-88)