NR 440.35(6)(a)(a) The owner or operator of any primary lead smelter subject to the provisions of this section shall install and operate: NR 440.35(6)(a)1.1. A continuous monitoring system to monitor and record the opacity of gases discharged into the atmosphere from any blast furnace, dross reverberatory furnace, or sintering machine discharge end. The span of this system shall be set at 80 to 100% opacity. NR 440.35(6)(a)2.2. A continuous monitoring system to monitor and record sulfur dioxide emissions discharged into the atmosphere from any sintering machine, electric furnace or converter subject to sub. (4). The span of this system shall be set at a sulfur dioxide concentration of 0.20% by volume. NR 440.35(6)(a)2.b.b. For the purpose of the continuous monitoring system performance evaluation required under s. NR 440.13 (3), the reference method referred to under the Relative Accuracy Test Procedure in Performance Specification 2 of 40 CFR part 60, Appendix B, incorporated by reference in s. NR 440.17, shall be Method 6 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17. For the performance evaluation, each concentration measurement shall be of one hour duration. The pollutant gas used to prepare the calibration gas mixtures required under Performance Specification 2 of Appendix B and for calibration checks under s. NR 440.13 (4) shall be sulfur dioxide. NR 440.35(6)(b)(b) Two-hour average sulfur dioxide concentrations shall be calculated and recorded daily for the 12 consecutive 2-hour periods of each operating day. Each 2-hour average shall be determined as the arithmetic mean of the appropriate 2 contiguous one-hour average sulfur dioxide concentrations provided by the continuous monitoring system installed under par. (a). 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)(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 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 440.36 Primary 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.