NR 666.107(3)(b)(b) Acceptable ambient levels. Chapter. NR 666 Appendix IV lists the reference air concentrations (RACs) for HCl (7 micrograms per cubic meter) and Cl2 (0.4 micrograms per cubic meter). NR 666.107(3)(c)(c) Multiple stacks. Owners and operators of facilities with more than one on-site stack from a boiler, industrial furnace, incinerator or other thermal treatment unit subject to controls on HCl or Cl2 emissions under an operating license or interim license shall conduct emissions testing and dispersion modeling to demonstrate that the aggregate emissions from all such on-site stacks do not result in an exceedance of the acceptable ambient levels for HCl and Cl2. NR 666.107(4)(4) Averaging periods. The HCl and Cl2 controls are implemented by limiting the feed rate of total chlorine and chloride in all feedstreams, including hazardous waste, fuels and industrial furnace feed stocks. Under Tier I, the feed rate of total chloride and chlorine is limited to the Tier I screening limits. Under Tier II and Tier III, the feed rate of total chloride and chlorine is limited to the feed rates during the trial burn (for new facilities or an interim license facility applying for a license) or the compliance test (for interim license facilities). The feed rate limits are based on either of the following: NR 666.107(5)(5) Adjusted Tier I feed rate screening limits. The owner or operator may adjust the feed rate screening limit provided by ch. NR 666 Appendix II to account for site-specific dispersion modeling. Under this approach, the adjusted feed rate screening limit is determined by back-calculating from the acceptable ambient level for Cl2 provided by ch. NR 666 Appendix IV using dispersion modeling to determine the maximum allowable emission rate. This emission rate becomes the adjusted Tier I feed rate screening limit. NR 666.107(6)(6) Emissions testing. Emissions testing for HCl and Cl2 shall be conducted using the procedures described in Methods 0050 or 0051, EPA SW-846, as incorporated by reference in s. NR 660.11. NR 666.107(8)(8) Enforcement. For the purposes of license enforcement, compliance with the operating requirements specified in the license (under s. NR 666.102) shall be regarded as compliance with this section. However, evidence that compliance with those license conditions is insufficient to ensure compliance with this section may be information justifying modification or revocation and re-issuance of a license under s. NR 670.041. NR 666.107 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06; corrections in (2) (a), (b), (3) (b), (5) made under s. 13.92 (4) (b) 7., Stats., Register March 2013 No. 687. NR 666.108NR 666.108 Small quantity on-site burner exemption. NR 666.108(1)(1) Exempt quantities. Owners and operators of facilities that burn hazardous waste in a non-site boiler or industrial furnace are exempt from this subchapter if all of the following conditions are met: NR 666.108(1)(a)(a) The quantity of hazardous waste burned in a device for a calendar month does not exceed the limits provided in the following table based on the terrain-adjusted effective stack height as defined in s. NR 666.106 (2) (c). NR 666.108(1)(b)(b) The maximum hazardous waste firing rate does not exceed at any time one percent of the total fuel requirements for the device (hazardous waste plus other fuel) on a total heat input or mass input basis, whichever results in the lower mass feed rate of hazardous waste. NR 666.108(1)(c)(c) The hazardous waste has a minimum heating value of 5,000 Btu/lb, as generated. NR 666.108(1)(d)(d) The hazardous waste fuel does not contain (and is not derived from) EPA hazardous waste numbers F020, F021, F022, F023, F026 or F027. 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.