§ 51.02  DEFINITIONS.
   (A)   For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
      ACT. The Federal Water Pollution Control Act, also known as the Clean Water Act, as amended, 33 U.S.C. §§ 1251 et seq.
      APPLICABLE PRETREATMENT STANDARD. For any pollutant, whichever local, state or federal pretreatment standard is most stringent.
      BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20°C expressed in terms of weight and concentration (milligrams per liter [mg/l]).
      CATEGORICAL PRETREATMENT REGULATIONS. Any regulation containing pollutant discharge limits promulgated in accordance with § 307(b) and (c) of the Clean Water Act, being 33 U.S.C. § 1317(b) and (c).
      CATEGORICAL PRETREATMENT STANDARDS. National pretreatment standards specifying quantities or concentrations of pollutants or pollutant properties which may be discharged or introduced into a POTW by specific industrial users.
      CITY. The City of Owatonna, Minnesota, or the City Council.
      GENERAL PRETREATMENT REGULATIONS. General pretreatment regulations for existing and new sources, 40 C.F.R. part 403.
      INDUSTRIAL USER. A person who discharges to city’s wastewater treatment system liquid wastes resulting from the processes employed in industrial, manufacturing, trade or business establishments, or from the development of any natural resource.
      INTERFERENCE. The inhibition or disruption of the city’s wastewater treatment system processes or operations which causes or significantly contributes to a violation of any requirement of the city’s NPDES or state disposal system permit. The term includes prevention of wastewater sludge use or disposal by the city in accordance with published regulations providing guidelines under § 405 of the Act, being 33 U.S.C. § 1345, or any regulations developed pursuant to the Solid Waste Disposal Act, being 42 U.S.C. §§ 6901 et seq., the Clean Air Act, being 42 U.S.C. §§ 7401 et seq., the Toxic Substances Control Act, being 15 U.S.C. §§ 2601 et seq., or more stringent state criteria applicable to the method of disposal or use employed by the city.
      MAY. The act referred to is permissive.
      NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT. Any permit or requirements issued by the Minnesota Pollution Control Agency (MPCA) pursuant to the Federal Water Pollution Control Act, being 33 U.S.C. §§ 1251 et seq., as amended, for the purpose of regulating the discharge of wastewater, industrial wastes or other wastes under the authority of § 402 of the Act, being 33 U.S.C. § 1342.
      NON-CONTACT COOLING WATER. The water discharged from any use such as air conditioning, cooling or refrigeration, or during which the only pollutant added to the water is heat.
      PERSON. The state or any agency or institution thereof, any municipality, governmental subdivision, public or private corporation, individual, partnership or other entity, including, but not limited to, association, commission or any interstate body, and including any officer or governing or managing body of any municipality, governmental subdivision or public or private corporation or other entity.
      pH. The logarithm (base 10) of the reciprocal of the concentration of hydrogen ions in moles per liter of solution.
      PRETREATMENT. The process of reducing the amount of pollutants, eliminating pollutants or altering the nature of pollutant properties in wastewater to a less harmful state prior to or in lieu of discharging or otherwise introducing such pollutants into the city’s wastewater treatment system. The reduction, elimination or alteration may be obtained by physical, chemical or biological processes, process changes or other means, except as prohibited by § 51.04(D) of this chapter.
      SHALL. The act referred to is mandatory.
      SIGNIFICANT INDUSTRIAL USER. Any industrial user of the city’s wastewater treatment system which:
         (a)   Has a discharge flow of 25,000 gallons or more per average work day;
         (b)   Has a flow greater than 5% of the flow in the city’s wastewater treatment system;
         (c)   Has in its wastes toxic pollutants in toxic amounts as defined pursuant to § 307 of the Act, being 33 U.S.C. § 1317, or state statutes and rules; or
         (d)   Has a significant impact, either singly or in combination with other contributing industries, on the wastewater treatment system, the quality of sludge, the system’s effluent quality or air emissions generated by the system.
      SLUG. Any waste discharge which, in concentration of any given constituent or in quantity of flow, exceeds for any time period longer than 30 minutes more than four times the average 24-hour concentration or flow during normal operation.
      STATE DISPOSAL SYSTEM PERMIT. Any permit (including any terms, conditions and requirements thereof) issued by the MPCA pursuant to Minn. Stat. § 115.07, as it may be amended from time to time, for a treatment system as defined by Minn. Stat. § 115.01, Subd. 8, as it may be amended from time to time.
      STATE. The State of Minnesota.
      STORM WATER. Any flow occurring during or following any form of natural precipitation and resulting therefrom.
      SUPERINTENDENT. The City Engineer or the Engineer’s duly authorized representative.
      SUSPENDED SOLIDS. The total suspended matter that floats on the surface of, or is suspended in, water, wastewater or other liquids, and which is removable by a standard glass fiber filter.
      USER. Any person who discharges, causes or permits the discharge of wastewater into the city’s wastewater treatment system.
      WASTEWATER. The liquid and water-carried industrial or domestic wastes from dwellings, commercial buildings, industrial facilities and institutions, together with any ground water, surface water and storm water that may be present, whether treated or untreated, which is discharged into or permitted to enter the city’s wastewater treatment system.
      WASTEWATER TREATMENT SYSTEM OR SYSTEMS. Any devices, facilities, structures, equipment or works owned or used by the city for the purpose of the transmission, storage or treatment of industrial and domestic wastewater, including intercepting sewers, outfall sewers, wastewater collection system, pumping, power and other equipment, and their appurtenances; extensions, improvements, remodeling additions and alterations thereof; and any works, including land that will be an integral part of the treatment process or is used for ultimate disposal or residues resulting from such treatment.
      WATERS OF THE STATE. All streams, lakes, ponds, marshes, aquifers, irrigation systems, drainage systems and all other bodies or accumulations of water, surface or underground, natural or artificial, public or private, which are contained within, flow through, or border upon the state or any portion thereof.
   (B)   Terms not otherwise defined herein shall be as given in Minn. Stat. Ch. 115 and 116, as they may be amended from time to time.
(1992 Code, § 277:01)