NR 440.43(6)(e)2.2. Install, calibrate, maintain and operate a device to continuously measure and record the pressure drop across the fan. The fan power consumption and pressure drop measurements shall be synchronized to allow real time comparisons of the data. The monitoring devices shall have an accuracy of ±5% over their normal operating ranges.
NR 440.43(6)(f)(f) The volumetric flow rate through each fan of the capture system shall be determined from the fan power consumption, fan pressure drop, and fan performance curve specified under par. (e), during any performance test required under s. NR 440.08 to demonstrate compliance with the standards under sub. (3) (a) 4. and 5. The owner or operator shall determine the volumetric flow rate at a representative temperature for furnace power input levels of 50 and 100% of the nominal rated capacity of the electric submerged arc furnace. At all times the electric submerged arc furnace is operated, the owner or operator shall maintain the fan power consumption and fan pressure drop at levels such that the volumetric flow rate is at or above the levels established during the most recent performance test for that furnace power input level. If emissions due to tapping are captured and ducted separately from emissions of the electric submerged arc furnace, during each tapping period the owner or operator shall maintain the fan power consumption and fan pressure drop at levels such that the volumetric flow rate is at or above the levels established during the most recent performance test. Operation at lower flow rates may be considered by the department to be unacceptable operation and maintenance of the affected facility. The owner or operator may request that these flow rates be reestablished by conducting new performance tests under s. NR 440.08. The department may require the owner or operator to verify the fan performance curve by monitoring necessary fan operating parameters and determining the gas volume moved relative to Methods 1 and 2 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17.
NR 440.43(6)(g)(g) All monitoring devices required under pars. (c) and (e) shall be checked for calibration annually in accordance with the procedures under s. NR 440.13 (2).
NR 440.43(7)(7)Test methods and procedures.
NR 440.43(7)(a)(a) During any performance test required in s. NR 440.08, the owner or operator may not allow gaseous diluents to be added to the effluent gas stream after the fabric in an open pressurized fabric filter collector unless the total gas volume flow from the collector is accurately determined and considered in the determination of emissions.
NR 440.43(7)(b)(b) 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 440.43(7)(c)(c) The owner or operator shall determine compliance with the particulate matter standards in sub. (3) as follows:
NR 440.43(7)(c)1.1. The emission rate (E) of particulate matter shall be computed for each run using the following equation:
where:
E is the emission rate of particulate matter, kg/MW-hr (lb/MW-hr)
N is the total number of exhaust streams at which emissions are quantified
Csi is the concentration of particulate matter from exhaust stream “i”, g/dscm (gr/dscf)
Qsdi is the volumetric flow rate of effluent gas from exhaust stream “i”, dscm/hr (dscf/hr)
P is the average furnace power input, MW
K is the conversion factor, 1000 g/kg (7000 gr/lb)
NR 440.43(7)(c)2.2. Method 5 shall be used to determine the particulate matter concentration (Csi) and volumetric flow rate (Qsdi) of the effluent gas, except that the heating systems specified in sections 2.1.2 and 2.1.6 of Method 5 are not to be used when the carbon monoxide content of the gas stream exceeds 10% by volume, dry basis. If a flare is used to comply with sub. (4), the sampling site shall be upstream of the flare. The sampling time shall include an integral number of furnace cycles.
NR 440.43(7)(c)2.a.a. When sampling emissions from open electric submerged arc furnaces with wet scrubber control devices, sealed electric submerged arc furnaces or semienclosed electric arc furnaces, the sampling time and sample volume for each run shall be at least 60 minutes and 1.80 dscm (63.6 dscf).
NR 440.43(7)(c)2.b.b. When sampling emissions from other types of installations, the sampling time and sample volume for each run shall be at least 200 minutes and 5.66 dscm (200 dscf).
NR 440.43(7)(c)3.3. The measurement device of sub. (6) (b) shall be used to determine the average furnace power input (P) during each run.
NR 440.43(7)(c)4.4. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.
NR 440.43(7)(c)5.5. The emission rate correction factor, integrated sampling procedures of Method 3B shall be used to determine the CO concentration. The sample shall be taken simultaneously with each particulate matter sample.
NR 440.43(7)(d)(d) During the particulate matter run, the maximum open hood area, in hoods with segmented or otherwise moveable sides, under which the process is expected to be operated and remain in compliance with all standards shall be recorded. Any future operation of the hooding system with open areas in excess of the maximum is not permitted.
NR 440.43(7)(e)(e) To comply with sub. (6) (d) or (f), the owner or operator shall use the monitoring devices in sub. (6) (c) or (e) to make the required measurements as determined during the performance test.
NR 440.43 HistoryHistory: Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (2) (intro.), Register, September, 1990, No. 417, eff. 10-1-90; r. and recr. (7), Register, July, 1993, No. 451, eff. 8-1-93; CR 06-109: am. (2) (c), (i), (k), (o), (q), (t) and (v) and (7) (c) 1. and 2. b. Register May 2008 No. 629, eff. 6-1-08.
NR 440.44NR 440.44Steel plants: electric arc furnaces constructed after October 21, 1974, and on or before August 17, 1983.
NR 440.44(1)(1)Applicability and designation of affected facility.
NR 440.44(1)(a)(a) The provisions of this section are applicable to the following affected facilities in steel plants that produce carbon, alloy, or specialty steels: electric arc furnaces and dust-handling systems.
NR 440.44(1)(b)(b) The provisions of this section apply to each affected facility identified under par. (a) that commenced construction, modification, or reconstruction after October 21, 1974 and on or before August 17, 1983.
NR 440.44(2)(2)Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02.