§ 50.002  DEFINITIONS.
   For the purpose of this chapter, the following definitions apply unless the context clearly indicates or requires a different meaning.
   APPROVING AUTHORITY. The City Clerk or his or her duly authorized representatives.
   BOD (BIOCHEMICAL OXYGEN DEMAND). The quantity of oxygen utilized in the biochemical oxidation of organic mater 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 the definition for Standard Methods below.
   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.
   CATEGORY A. Sanitary sewer users who discharge normal domestic strength wastewater with concentrations of BOD no greater than 210 mg/l and suspended solids no greater than 245 mg/l.
   CATEGORY B. Sanitary sewer users who discharge wastewater with concentrations in excess of 210 mg/l of BOD and 245 mg/l of suspended solids. Users whose wastewater exceeds the concentrations for any one of these parameters shall be in CATEGORY B.
   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 Brownsville.
   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 city’s NPDES permit for its wastewater treatment facility, provided that the facility is designed to treat additional pollutants, and, in fact, does remove the 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 such 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. Units, agencies, or instrumentalities of federal, state, or local government discharging normal domestic strength wastewater.
   GROUND GARBAGE. The residue from the preparation, cooking, dispensing, handling, storage, and sale of food products and produce that has been shredded to such a degree 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.
      (1)   A user who discharges into 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. These are identified in the Standard Industrial Classification Manual, 1972, Office of Management and Budget, as amended and supplemented, under one of the following divisions:
         (a)   Division A: agriculture, forestry, and fishing;
         (b)   Division B: mining;
         (c)   Division D: manufacturing;
         (d)   Division E: transportation, communications, electric, gas, and sanitary sewers; and
         (e)   Division I: services.
      (2)   Any non-governmental user of 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 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 WASTEWATER. The liquid processing wastes from an industrial manufacturing process, trade, or business including but not limited to all Standard Industrial Classification Manual’s Divisions A, B, D, E, and I manufacturers as distinct from domestic wastewater.
   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, nonprofit organizations).
   MAY. The term MAY is permissible.
   MUNICIPALITY. The City of Brownsville.
   NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT. A document issued by the Minnesota Pollution Control Agency which establishes effluent limitations and monitoring requirements for the municipal wastewater treatment facility. NPDES Permit No. 0053562 as issued 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 another body of surface water or groundwaters.
   NORMAL DOMESTIC STRENGTH WASTEWATER. Wastewater with concentrations of BOD no greater than 210 mg/l and suspended solids no greater than 245 mg/l.
   OPERATION AND MAINTENANCE COSTS. All costs associated with the operation and maintenance of the wastewater collection and treatment facilities, including administration and replacement costs, all as determined from time to time by the city.
   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 seven 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 useful life 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.
   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, maintenance, and replacement expenses, debt service costs, and other expenses or obligation of the facilities.
   SHALL. The term SHALL 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 Work 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. Total suspended matter that either floats on the surface of, or is in suspension in, water, wastewater, or other liquids, and that is removable by laboratory filtering as prescribed in Standard Methods 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, maintenance, and replacement expenses of those 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). The structures and equipment required to collect and carry wastewater.
   WASTEWATER TREATMENT FACILITY. An arrangement of devices and structures for treatment wastewater and sludge. Also referred to as WASTEWATER TREATMENT PLANT.
(Prior Code Ch. 50, § 16)