NR 440.315(2)(a)(a) “Basic oxygen process furnace” or “BOPF” means any furnace with a refractory lining in which molten steel is produced by charging scrap metal, molten iron, and flux materials or alloy additions into a vessel and by introducing a high volume of oxygen-rich gas. Open hearth, blast and reverberatory furnaces are not included in this definition. NR 440.315(2)(b)(b) “Bottom-blown furnace” means any BOPF in which oxygen and other combustion gases are introduced to the bath of molten iron through tuyeres in the bottom of the vessel or through tuyeres in the bottom and sides of the vessel. NR 440.315(2)(c)(c) “Fume suppression system” means the equipment comprising any system used to inhibit the generation of emissions from steelmaking facilities with an inert gas, flame or steam blanket applied to the surface of molten iron or steel. NR 440.315(2)(d)(d) “Hot metal transfer station” means the facility where molten iron is emptied from the railroad torpedo car or hot metal car to the shop ladle. This includes the transfer of molten iron from the torpedo car or hot metal car to a mixer (or other intermediate vessel) and from a mixer (or other intermediate vessel) to the ladle. This facility is also known as the reladling station or ladle transfer station. NR 440.315(2)(e)(e) “Primary emission control system” means the combination of equipment used for the capture and collection of primary emissions, e.g., an open hood capture system used in conjunction with a particular cleaning device such as an electrostatic precipitator or a closed hood capture system used in conjunction with a particulate matter cleaning device such as a scrubber. NR 440.315(2)(f)(f) “Primary emissions” means particulate matter emissions from the BOPF generated during the steel production cycle which are captured by, and do not thereafter escape from the BOPF primary control system. NR 440.315(2)(g)(g) “Primary oxygen blow” means the period in the steel production cycle of a BOPF during which a high volume of oxygen-rich gas is introduced to the bath of molten iron by means of a lance inserted from the top of the vessel. This definition does not include any additional, or secondary, oxygen blows made after the primary blow. NR 440.315(2)(h)(h) “Secondary emission control system” means the combination of equipment used for the capture and collection of secondary emissions, e.g.: NR 440.315(2)(h)1.1. An open hood system for the capture and collection of primary and secondary emissions from the BOPF, with local hooding ducted to a secondary emission collection device such as a baghouse for the capture and collection of emissions from the hot metal transfer and skimming station; or NR 440.315(2)(h)2.2. An open hood system for the capture and collection of primary and secondary emissions from the furnace, plus a furnace enclosure with local hooding ducted to a secondary emission collection device, such as a baghouse, for additional capture and collection of secondary emissions from the furnace, with local hooding ducted to a secondary emission collection device, such as a baghouse for the capture and collection of emissions from hot metal transfer and skimming stations; or NR 440.315(2)(h)3.3. A furnace enclosure with local hooding ducted to a secondary emission collection device such as a baghouse for the capture and collection of secondary emissions from a BOPF controlled by a closed hood primary emission control system, with local hooding ducted to a secondary emission collection device, such as baghouse, for the capture and collection of emissions from hot metal transfer and skimming stations. NR 440.315(2)(i)(i) “Secondary emissions” means particulate matter emissions that are not captured by the BOPF primary control system, including emissions from hot metal transfer and skimming stations. This definition also includes particulate matter emissions that escape from openings in the primary emission control system, such as from lance hole openings, gaps or tears in the ductwork of the primary emission control system, or leaks in hoods. NR 440.315(2)(j)(j) “Skimming station” means the facility where slag is mechanically raked from the top of the molten iron. NR 440.315(2)(k)(k) “Steel production cycle” means the operations conducted within the BOPF steelmaking facility that are required to produce each batch of steel, including the following operations: scrap charging, preheating (when used), hot metal charging primary oxygen blowing, sampling (vessel turndown and turnup), additional oxygen blowing (when used), tapping and deslagging. Hot metal transfer and skimming operations from the next steel production cycle are also included when the hot metal transfer station or skimming station is an affected facility. NR 440.315(2)(L)(L) “Top-blown furnace” means any BOPF in which oxygen is introduced to the bath of molten iron by means of an oxygen lance inserted from the top of the vessel. NR 440.315(3)(a)(a) Except as provided under pars. (b) and (c), on and after the date on which the performance test under s. NR 440.08 is required to be completed, no owner or operator subject to the provisions of this section may cause to be discharged into the atmosphere from any affected facility any secondary emissions that: NR 440.315(3)(a)1.1. Exit from the BOPF shop roof monitor (or other building openings) and exhibit greater than 10% opacity during the steel production cycle of any top-blown BOPF or during hot metal transfer or skimming operations for any bottom-blown BOPF, except that an opacity greater than 10% but less than 20% may occur once per steel production cycle. NR 440.315(3)(a)2.2. Exit from a control device used solely for the collection of secondary emissions from a top-blown BOPF or from hot metal transfer or skimming operations for a top-blown BOPF and contain particulate matter in excess of 23 mg/dscm (0.010 gr/dscf). NR 440.315(3)(a)3.3. Exit from a control device used solely for the collection of secondary emissions from a top-blown BOPF or from hot metal transfer or skimming operations for a top-blown or a bottom-blown BOPF and exhibit more than 5% opacity. NR 440.315(3)(b)(b) A fume suppression system used to control secondary emissions from an affected facility is not subject to par. (a) 2. and 3. NR 440.315(3)(c)(c) A control device used to collect both primary and secondary emissions from a BOPF is not subject to par. (a) 2. and 3. NR 440.315(4)(a)(a) Each owner or operator of an affected facility shall install, calibrate, operate, and maintain a monitoring device that continually measures and records for each steel production cycle the various rates or levels of exhaust ventilation at each phase of the cycle through each duct of the secondary emission capture system. The monitoring device or devices are to be placed at locations near each capture point of the secondary emission capture system to monitor the exhaust ventilation rates or levels adequately, or in alternative locations approved in advance by the department. NR 440.315(4)(b)(b) If a chart recorder is used, the owner or operator shall use chart recorders that are operated at minimum chart speed of 3.8 cm/hr (1.5 in/hr). NR 440.315(4)(c)(c) All monitoring devices required by par. (a) shall be certified by the manufacturer to be accurate to within ± 10% compared to Method 2 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1). The owner or operator shall recalibrate and check the devices annually and at other times as the department may require, in accordance with the written instructions of the manufacturer and by comparing the device against Method 2. NR 440.315(4)(d)(d) Each owner or operator subject to the requirements of par. (a) shall report on a semiannual basis all measurements of exhaust ventilation rates or levels over any 3-hour period that average more than 10% below the average rates or levels of exhaust ventilation maintained during the most recent performance test conducted under s. NR 440.08 in which the affected facility demonstrated compliance with the standard under sub. (3) (a) 2. The accuracy of the respective measurements, not to exceed the values specified in par. (c), may be considered when determining the measurement results that are to be reported. NR 440.315(4)(e)(e) If a scrubber primary emission control device is used to collect secondary emissions, the owner or operator shall report on a semiannual basis all measurements of exhaust ventilation rate over any 3-hour period that average more than 10% below the average levels maintained during the most recent performance text conducted under s. NR 440.08 in which the affected facility demonstrated compliance with the standard under sub. (3) (a) 1.