NR 666.108(2)(2) Mixing with nonhazardous fuels. If hazardous waste fuel is mixed with a nonhazardous fuel, the quantity of hazardous waste before such mixing is used to comply with sub. (1). NR 666.108(3)(3) Multiple stacks. If an owner or operator burns hazardous waste in more than one on-site boiler or industrial furnace exempt under this section, the quantity limits provided by sub. (1) (a) are implemented according to the following equation: where:
n means the number of stacks.
Actual Quantity Burned means the waste quantity burned per month in device “i”.
Allowable Quantity Burned means the maximum allowable exempt quantity for stack “i” from the table in sub. (1) (a).
NR 666.108 NoteNote: Hazardous wastes that are subject to the special requirements for small quantity generators under ss. NR 662.013 and 662.016 may be burned in an off-site device under the exemption provided by this section, but shall be included in the quantity determination for the exemption. NR 666.108(4)(4) Notification requirements. The owner or operator of facilities qualifying for the small quantity burner exemption under this section shall provide a one-time signed, written notice to the department indicating all of the following: NR 666.108(4)(a)(a) The combustion unit is operating as a small quantity burner of hazardous waste. NR 666.108(4)(c)(c) The maximum quantity of hazardous waste that the facility may burn per month as provided by sub. (1) (a). NR 666.108(5)(5) Recordkeeping requirements. The owner or operator shall maintain at the facility for at least 3 years sufficient records documenting compliance with the hazardous waste quantity, firing rate and heating value limits of this section. At a minimum, these records shall indicate the quantity of hazardous waste and other fuel burned in each unit per calendar month, and the heating value of the hazardous waste. NR 666.108 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06. NR 666.109(1)(1) Waiver of DRE standard. The DRE standard of s. NR 666.104 (1) does not apply if the boiler or industrial furnace is operated in conformance with par. (a) and the owner or operator demonstrates by procedures prescribed in par. (b) that the burning will not result in unacceptable adverse health effects. NR 666.109(1)(a)(a) The device shall be operated with all of the following conditions: NR 666.109(1)(a)1.1. A minimum of 50% of fuel fired to the device shall be fossil fuel, fuels derived from fossil fuel, tall oil, or, if approved by the department on a case-by-case basis, other nonhazardous fuel with combustion characteristics comparable to fossil fuel. Such fuels are termed primary fuel for purposes of this section. (Tall oil is a fuel derived from vegetable and rosin fatty acids.) The 50% primary fuel firing rate shall be determined on a total heat or mass input basis, whichever results in the greater mass feed rate of primary fuel fired. NR 666.109(1)(a)2.2. Primary fuels and hazardous waste fuels shall have a minimum as-fired heating value of 8,000 Btu/lb. NR 666.109(1)(a)3.3. The hazardous waste shall be fired directly into the primary fuel flame zone of the combustion chamber. NR 666.109(1)(a)4.4. The device shall operate in conformance with the carbon monoxide controls provided by s. NR 666.104 (2) (a). Devices subject to the exemption provided by this section are not eligible for the alternative carbon monoxide controls provided by s. NR 666.104 (3). NR 666.109(1)(b)(b) Procedures to demonstrate that the hazardous waste burning will not pose unacceptable adverse public health effects are all of the following: NR 666.109(1)(b)1.1. Identify and quantify those nonmetal compounds listed in ch. NR 661 Appendix VIII that could reasonably be expected to be present in the hazardous waste. The constituents excluded from analysis shall be identified and the basis for their exclusion explained. NR 666.109(1)(b)2.2. Calculate reasonable, worst case emission rates for each constituent identified in subd. 1. by assuming the device achieves 99.9% destruction and removal efficiency. That is, assume that 0.1% of the mass weight of each constituent fed to the device is emitted. NR 666.109(1)(b)3.3. For each constituent identified in subd. 1., use emissions dispersion modeling to predict the maximum annual average ground level concentration of the constituent. NR 666.109(1)(b)3.b.b. Owners and operators of facilities with more than one on-site stack from a boiler or industrial furnace that is exempt under this section shall conduct dispersion modeling of emissions from all stacks exempt under this section to predict ambient levels prescribed by this subdivision. NR 666.109(1)(b)4.4. Ground level concentrations of constituents predicted under subd. 3. may not exceed all of the following levels: