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. NR 440.315(5)(a)(a) In conducting the performance tests required in s. NR 440.08, the owner or operator shall use as reference methods and procedures the test methods in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, or other methods and procedures as specified in this subsection, except as provided in s. NR 440.08 (2). NR 440.315(5)(b)(b) The owner or operator shall determine compliance with the particulate matter standard in sub. (3) as follows: NR 440.315(5)(b)1.1. Start and end times of each steel production cycle during each run shall be recorded. NR 440.315 NoteNote: See sub. (6) (c) and (d) for the definitions of start and end times of a cycle.
NR 440.315(5)(b)2.2. Method 5 shall be used to determine the particulate matter concentration. Sampling shall be conducted only during the steel production cycle and for a sufficient number of steel production cycles to obtain a total sample volume of at least 5.67 dscm (200 dscf) for each run. NR 440.315(5)(b)3.3. Method 9 and the procedures of s. NR 440.11 shall be used to determine opacity, except sections 2.4 and 2.5 of Method 9 shall be replaced with the following instructions for recording observations and reducing data: NR 440.315(5)(b)3.a.a. Section 2.4. Opacity observations shall be recorded to the nearest 5% at 15-second intervals. During the initial performance test conducted pursuant to s. NR 440.08, observations shall be made and recorded in this manner for a minimum of 3 steel production cycles. During any subsequent compliance test, observations may be made for any number of steel production cycles, although, where conditions permit, observations will generally be made for a minimum of 3 steel production cycles. NR 440.315(5)(b)3.b.b. Section 2.5. Opacity shall be determined as an average of 12 consecutive observations recorded at 15-second intervals. For each steel production cycle, divide the observations recorded into sets of 12 consecutive observations. Sets need not be consecutive in time, and in no case may 2 sets overlap. For each set of 12 observations, calculate the average by summing the opacity of 12 consecutive observations and dividing this sum by 12. NR 440.315(5)(c)(c) In complying with the requirements of sub. (4) (c), the owner or operator shall conduct an initial test as follows: NR 440.315(5)(c)1.1. For devices that monitor and record the exhaust ventilation rate, compare velocity readings recorded by the monitoring device against the velocity readings obtained by Method 2. Take Method 2 readings at a point or points that would properly characterize the monitoring device’s performance and that would adequately reflect the various rates of exhaust ventilation. Obtain readings at sufficient intervals to obtain 12 pairs of readings for each duct of the secondary emission capture system. Compare the averages of the 2 sets to determine whether the monitoring device velocity is within ± 10% of the Method 2 average. NR 440.315(5)(c)2.2. For devices that monitor the level of exhaust ventilation and record only step changes when a set point rate is reached, compare step changes recorded by the monitoring device against the velocity readings obtained by Method 2. Take Method 2 readings at a point or points that would properly characterize the performance of the monitoring device and that would adequately reflect the various rates of exhaust ventilation. Obtain readings at sufficient intervals to obtain 12 pairs of readings for each duct of the secondary emission capture system. Compare the averages of the 2 sets to determine whether the monitoring device step change is within ± 10% of the setpoint rate.