NR 440.35(6)(c)(c) For the purpose of reports required under s. NR 440.07 (3), periods of excess emissions that shall be reported are defined as follows:
NR 440.35(6)(c)1.1. Opacity. Any 6-minute period during which the average opacity, as measured by the continuous monitoring system installed under par. (a), exceeds the standard under sub. (5) (a).
NR 440.35(6)(c)2.2. Sulfur dioxide. Any 2-hour period, as described in par. (b), during which the average emissions of sulfur dioxide, as measured by the continuous monitoring system installed under par. (a), exceeds the standard under sub. (4).
NR 440.35(7)(7)Test methods and procedures.
NR 440.35(7)(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 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 s. NR 440.08 (2).
NR 440.35(7)(b)(b) The owner or operator shall determine compliance with the particulate matter, sulfur dioxide (SO2) and visible emission standards in subs. (3) to (5) as follows:
NR 440.35(7)(b)1.1. 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 0.85 dscm (30 dscf).
NR 440.35(7)(b)2.2. The continuous monitoring system of sub. (6) (a) 2. shall be used to determine the SO2 concentrations on a dry basis. The sampling time for each run shall be 2 hours, and the average SO2 concentration for the 2-hour period shall be computed as in sub. (6) (b). The monitoring system drift during the run may not exceed 2% of the span value.
NR 440.35(7)(b)3.3. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.
NR 440.35 HistoryHistory: Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (2) (intro.), Register, September, 1990, No. 417, eff. 10-1-90; am. (6) (a) 2. a. and b., r. and recr. (7), Register, July, 1993, No. 451, eff. 8-1-93; am. (6) (a) 2. b., Register, December, 1995, No. 480, eff. 1-1-96.
NR 440.36NR 440.36Primary aluminum reduction plants.
NR 440.36(1)(1)Applicability and designation of affected facility.
NR 440.36(1)(a)(a) The affected facilities in primary aluminum reduction plants to which this section applies are potroom groups and anode bake plants.
NR 440.36(1)(b)(b) Except as provided in par. (c), any affected facility under par. (a) that commences construction or modification after October 23, 1974, is subject to the requirements of this section.
NR 440.36(1)(c)(c) An owner or operator of an affected facility under par. (a) may elect to comply with the requirements of this section or the requirements of 40 CFR part 63.
NR 440.36(2)(2)Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02.
NR 440.36(2)(a)(a) “Aluminum equivalent” means an amount of aluminum which can be produced from a Mg of anodes produced by an anode bake plant as determined by sub. (6) (b) 4. b.
NR 440.36(2)(b)(b) “Anode bake plant” means a facility which produces carbon anodes for use in a primary aluminum reduction plant.
NR 440.36(2)(c)(c) “Potroom” means a building unit which houses a group of electrolytic cells in which aluminum is produced.
NR 440.36(2)(d)(d) “Potroom group” means an uncontrolled potroom, a potroom which is controlled individually, or a group of potrooms or potroom segments ducted to a common control system.
NR 440.36(2)(e)(e) “Primary aluminum reduction plant” means any facility manufacturing aluminum by electrolytic reduction.
NR 440.36(2)(f)(f) “Primary control system” means an air pollution control system designed to remove gaseous and particulate fluorides from exhaust gases which are captured at the cell.
NR 440.36(2)(g)(g) “Roof monitor” means that portion of the roof of a potroom where gases not captured at the cell exit from the potroom.
NR 440.36(2)(h)(h) “Total fluorides” means elemental fluorine and all fluoride compounds as measured by reference methods specified in sub. (6) or by equivalent or alternative methods.
NR 440.36(3)(3)Standards for fluorides.
NR 440.36(3)(a)(a) On and after the date on which the initial performance test required to be conducted by s. NR 440.08 is 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 gases containing total fluorides, as measured according to sub. (6), in excess of:
NR 440.36(3)(a)1.1. 1.0 kg/Mg (2.0 lb/ton) of aluminum produced for potroom groups at Soderberg plants, except that emissions between 1.0 kg/Mg and 1.3 kg/Mg (2.6 lb/ton) shall be considered in compliance if the owner or operator demonstrates that exemplary operation and maintenance procedures were used with respect to the emission control system and that proper control equipment was operating at the affected facility during the performance tests;
NR 440.36(3)(a)2.2. 0.95 kg/Mg (1.9 lb/ton) of aluminum produced for potroom groups at prebake plants, except that emissions between 0.95 kg/Mg and 1.25 kg/Mg (2.5 lb/ton) shall be considered in compliance if the owner or operator demonstrates that exemplary operation and maintenance procedures were used with respect to the emission control system and that proper control equipment was operating at the affected facility during the performance test; and
NR 440.36(3)(a)3.3. 0.050 kg/Mg (0.10 lb/ton) of aluminum equivalent for anode bake plants.