NR 440.36(4)(4)Standard for visible emissions.
NR 440.36(4)(a)(a) On and after the date on which the 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:
NR 440.36(4)(a)1.1. From any potroom group any gases which exhibit 10% opacity or greater, or
NR 440.36(4)(a)2.2. From any anode bake plant any gases which exhibit 20% opacity or greater.
NR 440.36(5)(5)Monitoring of operations.
NR 440.36(5)(a)(a) The owner or operator of any affected facility subject to the provisions of this section shall install, calibrate, maintain and operate monitoring devices which can be used to determine daily the weight of aluminum and anode produced. The weighing devices shall have an accuracy of ± 5% over their operating range.
NR 440.36(5)(b)(b) The owner or operator of any affected facility shall maintain a record of daily production rates of aluminum and anodes, raw material feed rates, and cell or potline voltages.
NR 440.36(5)(c)(c) Following the initial performance test as required under s. NR 440.08 (1), an owner or operator shall conduct a performance test at least once each month during the life of the affected facility, except when malfunctions prevent representative sampling, as provided under s. NR 440.08 (3). The owner or operator shall give the department at least 15 days advance notice of each test. The department may require additional testing under ch. NR 439.
NR 440.36 NoteNote: Under 40 CFR 60.195 (b), an owner or operator may petition the administrator to establish an alternate testing requirement that requires testing less frequently than once each month for a primary control system or an anode bake plant if it can be shown that their emissions have low variability during day-to-day operations. The alternative testing requirement must be published in the federal register and include a testing schedule and, in the case of a primary control system, the method to be used to determine primary control system emissions for the purpose of performance tests.
NR 440.36(6)(6)Test methods and procedures.
NR 440.36(6)(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 440.36(6)(b)(b) The owner or operator shall determine compliance with the total fluorides and visible emission standards in subs. (3) and (4) as follows:
NR 440.36(6)(b)1.1. The emission rate (Ep) of total fluorides from potroom groups shall be computed for each run using the following equation:
Ep = [(Cs Qsd)1 + (Cs Qsd)2]/(PK)
where:
Ep is the emission rate of total fluorides from a potroom group, kg/Mg (lb/ton)
Cs is the concentration of total fluorides, mg/dscm (gr/dscf)
Qsd is the volumetric flow rate of effluent gas, dscm/hr (dscf/hr)
P is the aluminum production rate, Mg/hr (ton/hr)
K is the conversion factor, 106 mg/kg (7000 gr/lb)
1 is the subscript for primary control system effluent gas
2 is the subscript for secondary control system or roof monitor effluent gas
NR 440.36(6)(b)2.2. The emission rate (Eb) of total fluorides from anode bake plants shall be computed for each run using the following equation:
Eb = (Cs Qsd)/(PeK)
where:
Eb is the emission rate of total fluorides, kg/Mg (lb/ton) of aluminum equivalent
Cs is the concentration of total fluorides, mg/dscm (gr/dscf)
Qsd is the volumetric flow rate of effluent gas, dscm/hr (dscf/hr)
Pe is the aluminum equivalent for anode production rate, Mg/hr (ton/hr)