Chapter NR 273

NR 273.04   Applicability; description of the precious metals subcategory.

NR 273.041   Discharge prohibitions.

NR 273.042   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.043   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.044   New source performance standards.

NR 273.045   Pretreatment standards for existing sources.

NR 273.046   Pretreatment standards for new sources.

Subchapter V — Refractory Metals

NR 273.05   Applicability; description of the refractory metals subcategory.

NR 273.051   Discharge prohibitions.

NR 273.052   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.053   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.054   New source performance standards.

NR 273.055   Pretreatment standards for existing sources.

NR 273.056   Pretreatment standards for new sources.

Subchapter VI — Titanium

NR 273.06   Applicability; description of the titanium subcategory.

NR 273.061   Discharge prohibitions.

NR 273.062   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.063   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.064   New source performance standards.

NR 273.065   Pretreatment standards for existing sources.

NR 273.066   Pretreatment standards for new sources.

Subchapter VII — Uranium

NR 273.07   Applicability; description of the uranium subcategory.

NR 273.071   Discharge prohibitions.

NR 273.072   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.073   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.074   New source performance standards.

NR 273.076   Pretreatment standards for new sources.

Subchapter VIII — Zinc

NR 273.08   Applicability; description of the zinc subcategory.

NR 273.081   Discharge prohibitions.

NR 273.082   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.083   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.084   New source performance standards.

NR 273.086   Pretreatment standards for new sources.

Subchapter IX — Zirconium-Hafnium

NR 273.09   Applicability; description of the zirconium-hafnium subcategory.

NR 273.091   Discharge prohibitions.

NR 273.092   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.093   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.094   New source performance standards.

NR 273.095   Pretreatment standards for existing sources.

NR 273.096   Pretreatment standards for new sources.

Subchapter X — Metal Powders

NR 273.10   Applicability; description of the metal powders subcategory.

NR 273.101   Discharge prohibitions.

NR 273.102   Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 273.103   Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 273.104   New source performance standards.

NR 273.105   Pretreatment standards for existing sources.

NR 273.106   Pretreatment standards for new sources.

NR 273.001 NR 273.001 Purpose. The purpose of this chapter is to establish effluent limitations, new source performance standards, and pretreatment standards for the discharge of process wastewater pollutants from the nonferrous metals forming and metal powders point source category and its subcategories.

NR 273.001 History History: Cr. Register, September, 1990, No. 417, eff. 10-1-90.

NR 273.002 NR 273.002 Applicability.

NR 273.002(1) (1) Except as provided in sub. (2), this chapter applies to discharges of pollutants to waters of the state and to publicly owned treatment works from the forming of nonferrous metals and nonferrous metal alloys and the associated ancillary operations.

NR 273.002(2) (2) This chapter does not apply to the forming of:

NR 273.002(2)(a) (a) Beryllium, copper, aluminum, or their alloys; or

NR 273.002(2)(b) (b) Cadmium, chromium, gallium, germanium, indium, lithium, manganese, neodynum, or praseodymium.

NR 273.002(3) (3) This chapter applies to discharges to waters of the state and the introduction of pollutants into publicly owned treatment works from the mechanical production of metal powders from iron, copper, aluminum, nonferrous metals, and their alloys, the forming of parts from metal powders, and the associated ancillary operations. This chapter does not apply to the production of metal powders by chemical means such as precipitation. If the metal powder is produced as the final step in refining metal, the regulations for nonferrous metals manufacturing, ch. NR 274, apply.

NR 273.002(4) (4) This chapter applies to any chemical of electrochemical treatment applied to the surface of the metal whenever these surface treatments are performed at the plant site where the metals are formed. If surface treatment is performed at a site other than where the metals are formed, regulations for electroplating, ch. NR 260, or metal finishing, ch. NR 261, apply.

NR 273.002(5) (5) This chapter applies to casting when the casting is performed as an integral part of the metal forming process and takes place at the site where the metals are formed. When the casting does not take place where the metals are formed, the regulations for metal molding and casting, ch. NR 256, apply.

NR 273.002 History History: Cr. Register, September, 1990, No. 417, eff. 10-1-90.

NR 273.003 NR 273.003 General definitions. In addition to the definitions set forth in ss. NR 205.03, 205.04, and 211.03, the following definitions apply to the terms used in this chapter:

NR 273.003(1) (1) “Alkaline cleaning” means the removal of lard, oil, and other compounds from a metal surface by a solution bath, usually detergent, followed by a rinse or multiple stage rinsing.

NR 273.003(2) (2) “Aluminum alloy” means an alloy in which aluminum is the major constituent in percent by weight.

NR 273.003(3) (3) “Ancillary operation” means an operation performed as an integral part of the forming, such as casting for subsequent forming, heat treatment, surface treatment, alkaline cleaning, solvent degreasing, product testing, surface coating, sawing, grinding, tumbling, burnishing, and wet air pollution control.

NR 273.003(4) (4) “Atomization” means the process by which a stream of water or gas impinges upon a molten metal stream, breaking it into droplets which solidify as powder particles.

NR 273.003(5) (5) “Beryllium alloy” means an alloy in which beryllium is present at 0.1% or greater.

NR 273.003(6) (6) “Burnishing” means a surface finishing process in which minute surface irregularities are displaced rather than removed.

NR 273.003(7) (7) “Casting” means pouring molten metal into a mold to produce an object of the desired shape.

NR 273.003(8) (8) “Cladding” means the art of producing a composite metal containing 2 or more layers which have been metallurgically bonded together by roll bonding, solder application, or explosion bonding.

NR 273.003(9) (9) “Contact cooling water” means wastewater which contacts the metal workpiece or the raw materials used in forming metals for the purpose of removing heat from the metal.

NR 273.003(10) (10) “Continuous casting” means the production of sheet, rod, or other long shapes by solidifying the metal while it is being poured through an open ended mold.

NR 273.003(11) (11) “Copper alloy” means an alloy in which copper is the major constituent by weight, except any copper-precious metal alloy containing 30% by weight or greater precious metal is a precious metal alloy.

NR 273.003(12) (12) “Degreasing” means the removal of oils and greases from the surface of the metal workpiece by detergents as in alkaline cleaning or by the use of solvents.

NR 273.003(13) (13) “Direct chill casting” means an operation in which molten nonferrous metal is poured into a water cooled mold, contact cooling water is sprayed on the metal as it is dropped into the mold, and the metal ingot falls into a water bath at the end of the casting process.

NR 273.003(14) (14) “Forming” means a set of manufacturing operations in which metals and alloys are made into semifinished products by hot or cold working, such as hot and cold rolling, extruding, forging, drawing, swaging, cladding, and tube reducing.

NR 273.003(15) (15) “Drawing” means the process of pulling a metal through dies or succession of dies to reduce the metal’s diameter or alter its cross sectional shape.

NR 273.003(16) (16) “Dye penetrant testing” means a nondestructive method for finding discontinuities that are open to the surface of the metal in which a dye is applied to the surface of the metal and the excess is rinsed off so that the dye which penetrates the surface is not rinsed off and thus marks the discontinuities.

NR 273.003(17) (17) “Emulsion” means a stable dispersion of 2 immiscible liquids, usually oil and water.

NR 273.003(18) (18) “Electrocoating” means the electrodeposition of a metallic or nonmetallic coating onto the surface of a workpiece.

NR 273.003(19) (19) “Existing source” means any point source from which pollutants may be discharged either directly into the waters of the state or into a POTW, except a new source as defined in sub. (30).

NR 273.003(20) (20) “Extrusion” means the application of pressure to a billet of metal which forces the metal to flow through a die orifice.

NR 273.003(21) (21) “Forging” means deforming a usually hot metal with compressive force into a desired shape, with or without dies, but where dies are used the metal is forced to take the shape of the die.

NR 273.003(22) (22) “Grinding” means processes, such as surface finishing, sanding and slicing, in which stock is removed from a workpiece by the use of a tool consisting of abrasive grains held by a rigid or semirigid grinder.

NR 273.003(23) (23) “Heat treatment” means the application of heat of a specified temperature and duration to change the physical properties of the metal.