NR 440.31(3)(b)1.a.a. Contain particulate matter in excess of 50 mg/dscm (0.022 gr/dscf), as measured for the primary oxygen blow. NR 440.31(3)(b)1.b.b. Exit from a control device not used solely for the collection of secondary emissions, as defined in s. NR 440.315 (2), and exhibit 10% opacity or greater, except that an opacity greater than 10% but less than 20% may occur once per steel production cycle. NR 440.31(3)(b)2.2. On or after the date on which the performance test required by s. NR 440.08 is completed, no owner or operator of an affected facility for which closed hooding is the method for controlling primary emissions may cause to be discharged into the atmosphere any gases that: NR 440.31(3)(b)2.a.a. Contain particulate matter in excess of 68 mg/dscm (0.030 gr/dscf), as measured for the primary oxygen blow. NR 440.31(3)(b)2.b.b. Exit from a control device not used solely for the collection of secondary emissions, as defined in s. NR 440.315 (2), and exhibit 10% opacity or greater, except that an opacity greater than 10% but less than 20% may occur once per steel production cycle. NR 440.31(3)(c)(c) On and after the date on which the performance test required by s. NR 440.08 is completed, each owner or operator of an affected facility subject to par. (b) shall operate the primary gas cleaning system during any reblow in a manner identical to operation during the primary oxygen blow. NR 440.31(4)(a)(a) The owner or operator of an affected facility shall maintain a single time-measuring instrument which shall be used in recording daily the time and duration of each steel production cycle, and the time and duration of any diversion of exhaust gases from the main stack servicing the BOPF. NR 440.31(4)(b)(b) The owner or operator of any affected facility that uses venturi scrubber emission control equipment shall install, calibrate, maintain, and continuously operate monitoring devices as follows: NR 440.31(4)(b)1.1. A monitoring device for the continuous measurement of the pressure loss through the venturi constriction of the control equipment. The monitoring device shall be certified by the manufacturer to be accurate within ± 250 Pa (± 1 inch water). NR 440.31(4)(b)2.2. A monitoring device for the continuous measurement of the water supply pressure to the control equipment. The monitoring device shall be certified by the manufacturer to be accurate within ± 5% of the design water supply pressure. The monitoring device’s pressure sensor or pressure tap shall be located close to the water discharge point. The department shall be consulted for approval in advance of selecting alternative locations for the pressure sensor or tap. NR 440.31(4)(b)3.3. All monitoring devices shall be synchronized each day with the time-measuring instrument used under par. (a). The chart recorder error directly after synchronization may not exceed 0.08 cm (1/32 inch). NR 440.31(4)(b)4.4. All monitoring devices shall use chart recorders which are operated at a minimum chart speed of 3.8 cm/hr (1.5 in/hr). NR 440.31(4)(b)5.5. All monitoring devices shall be recalibrated annually, and at other times as the department may require, in accordance with the procedures under s. NR 440.13 (2). NR 440.31(4)(c)(c) Any owner or operator subject to requirements under par. (b) shall report to the department, on a semiannual basis, all measurements over any 3-hour period that average more than 10% below the average levels maintained during the most recent performance test conducted under s. NR 440.08 in which the affected facility demonstrated compliance with the mass standards under sub. (3) (a) 1., (b) 1. a. or 2. a. The accuracy of the respective measurements, not to exceed the values specified in par. (b) 1. and 2., may be taken into consideration when determining the measurement results that must be reported. NR 440.31(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 440.31(5)(b)(b) The owner or operator shall determine compliance with the particulate matter standards in sub. (3) as follows: NR 440.31(5)(b)1.1. The time-measuring instrument of sub. (4) shall be used to document the time and duration of each steel production cycle and each diversion period during each run. NR 440.31(5)(b)2.2. Method 5 shall be used to determine the particulate matter concentration. The sampling time and sample volume for each run shall be at least 60 minutes and 1.50 dscm (53 dscf). Sampling shall be discontinued during periods of diversions. NR 440.31(5)(b)2.a.a. For affected facilities that commenced construction, modification or reconstruction on or before January 20, 1983, the sampling for each run shall continue for an integral number of steel production cycles. A cycle shall start at the beginning of either the scrap preheat or the oxygen blow and shall terminate immediately before tapping. NR 440.31(5)(b)2.b.b. For affected facilities that commenced construction, modification or reconstruction after January 20, 1983, the sampling for each run shall continue for an integral number of primary oxygen blows. NR 440.31(5)(b)3.3. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity. Observations taken during a diversion period may not be used in determining compliance with the opacity standard. Opacity observations taken at 15-second intervals immediately before and after a diversion of exhaust gases from the stack may be considered to be consecutive for the purpose of computing an average opacity for a 6-minute period. NR 440.31(5)(c)(c) The owner or operator shall use the monitoring devices of sub. (4) (b) 1. and 2. for the duration of the particulate matter runs. The arithmetic average of all measurements taken during these runs shall be used to determine compliance with sub. (4) (c). NR 440.31 HistoryHistory: Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (2) (intro.), and (a), (3) (a) (intro.), (4) (b) 2. and (c), (5) (b), r. and recr. (2) (b), renum. (2) (c) to be (2) (d) and am., cr. (2) (c), (3) (b) and (c), Register, September, 1990, No. 417, eff. 10-1-90; am. (4) (b) 5., r. and recr. (5), Register, July, 1993, No. 451, eff. 8-1-93; am. (4) (b) 1., 4., Register, December, 1995, No. 480, eff. 1-1-96; CR 06-109: am. (5) (c) Register May 2008 No. 629, eff. 6-1-08. NR 440.315NR 440.315 Basic oxygen process steelmaking facilities for which construction is commenced after January 20, 1983. NR 440.315(1)(1) Applicability and designation of affected facilities. NR 440.315(1)(a)(a) The provisions of this section apply to the following affected facilities in an iron and steel plant: top-blown BOPFs and hot metal transfer stations and skimming stations used with bottom-blown or top-blown BOPFs. NR 440.315(1)(b)(b) This section applies to any facility identified in par. (a) that commences construction, modification or reconstruction after January 20, 1983.