NR 463.22(16)(16) “Free organic liquids” means material that fails the paint filter test by Method 9095A, “Paint Filter Liquids Test”, Revision 1, December 1996, as published in EPA Publication SW–846 “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods”, incorporated by reference in s. NR 484.06 (4) (e). If any portion of the material passes through and drops from the filter within the 5-minute test period, the material contains free liquids.

NR 463.22(17)(17) “Fresh acid solution” means a sulfuric acid solution used for the control of triethylamine emissions that has a pH of 2.0 or less.

NR 463.22(18)(18) “Fugitive emissions” means any pollutant released to the atmosphere that is not discharged through a conveyance, as defined in sub. (8).

NR 463.22(19)(19) “Furan warm box mold or core making line” means a mold or core making line in which the binder chemical system used is that system commonly designated as a furan warm box system by the foundry industry.

NR 463.22(20)(20) “Iron and steel foundry” means a facility or portion of a facility that melts one or more of the following: scrap, ingot or other forms of iron and steel, and pours the resulting molten metal into molds to produce final or near final shape products for introduction into commerce. Research and development facilities and operations that only produce non-commercial castings are not included in this definition.

NR 463.22(21)(21) “Metal melting furnace” means a cupola, electric arc furnace or electric induction furnace that converts one or more of the following: scrap, foundry returns and other solid forms of iron and steel to a liquid state. Metal melting furnace does not include a holding furnace, an argon oxygen decarburization vessel or ladle that receives molten metal from a metal melting furnace, and to which metal ingots or other material may be added to adjust the metal chemistry.

NR 463.22(22)(22) “Mold or core making line” means the collection of equipment that is used to mix an aggregate of sand and binder chemicals, form the aggregate into final shape and harden the formed aggregate. A mold or core making line does not include a line for making green sand molds or cores.

NR 463.22(23)(23) “Mold vent” means an intentional opening in a mold through which gases containing pyrolysis products of organic mold and core constituents produced by contact with or proximity to molten metal normally escape the mold during and after metal pouring.

NR 463.22(24)(24) “Monitoring malfunction” means any sudden, infrequent, not reasonably preventable failure of the monitoring system to provide valid data. Monitoring failures that are caused in part by poor maintenance or careless operation are not malfunctions.

NR 463.22(25)(25) “Pouring area” means an area, generally associated with floor and pit molding operations, in which molten metal is brought to each individual mold. Pouring areas include all pouring operations that are not a pouring station.

NR 463.22(26)(26) “Pouring station” means the fixed location to which molds are brought in a continuous or semi-continuous manner to receive molten metal, after which the molds are moved to a cooling area.

NR 463.22(27)(27) “Responsible official” has the meaning given in s. NR 400.02 (136).

NR 463.22(28)(28) “Scrap preheater” means a vessel or other piece of equipment in which metal scrap that is to be used as melting furnace feed is heated to a temperature high enough to eliminate moisture and other volatile impurities or tramp materials by direct flame heating or similar means of heating.

NR 463.22(29)(29) “Scrubber blowdown” means liquor or slurry discharged from a wet scrubber that is either removed as a waste stream or processed to remove impurities or adjust its composition or pH before being returned to the scrubber.

NR 463.22(30)(30) “Work practice standard” means any design, equipment, work practice, operational standard or combination thereof, that is promulgated pursuant to section 112 (h) of the Clean Air Act (42 USC 7412 (h)).

NR 463.22(31)(31) “You” or “your” means the owner or operator of an iron and steel foundry.

NR 463.23NR 463.23 Emissions limitations, work practice standards and operation and maintenance requirements.

NR 463.23(1)(1) What emission limits must I meet?

NR 463.23(1)(a)(a) You shall meet each of the following emission limits or standards that applies to you:

NR 463.23(1)(a)1.1. For each electric arc metal melting furnace, electric induction metal melting furnace or scrap preheater at an existing iron and steel foundry, as described in s. NR 463.21 (3) (c), you may not discharge emissions through a conveyance to the atmosphere that exceed either the limit for particulate matter (PM) in subd. 1. a. or the limit for total metal HAP in subd. 1. b.:

NR 463.23(1)(a)2.2. For each cupola metal melting furnace at an existing iron and steel foundry, as described in s. NR 463.21 (3) (c), you may not discharge emissions through a conveyance to the atmosphere that exceed either the limit for PM in subd. 2. a. or the limit for total metal HAP in subd. 2. b.:

NR 463.23(1)(a)3.3. For each cupola metal melting furnace or electric arc metal melting furnace at a new iron and steel foundry, as described in s. NR 463.21 (3) (d), you may not discharge emissions through a conveyance to the atmosphere that exceed either the limit for PM in subd. 3. a. or, alternatively, the limit for total metal HAP in subd. 3. b.: