Standards to control metals emissions

Standards to control metals emissions. (1) General. The owner or operator shall comply with the metals standards provided by subs. (2) , (3) , (4) , (5) , or (6) for each metal listed in sub. (2) that is present in the hazardous waste at detectable levels by using appropriate analytical procedures. (2) Tier I feed rate screening limits. Feed rate screening limits for metals are specified in ch. NR 666 Appendix I as a function of terrain-adjusted effective stack height and terrain and land use in the vicinity of the facility. Criteria for facilities that are not eligible to comply with the screening limits are provided in par. (g) . (a) Noncarcinogenic metals. The feed rates of antimony, barium, lead, mercury, thallium and silver in all feed streams, including hazardous waste, fuels, and industrial furnace feed stocks may not exceed the screening limits specified in ch. NR 666 Appendix I . 1. The feed rate screening limits for antimony, barium, mercury, thallium and silver are based on either of the following: a. An hourly rolling average as defined in s. NR 666.102 (5) (f) 1. b. b. An instantaneous limit not to be exceeded at any time. 2. The feed rate screening limit for lead is based on one of the following: a. An hourly rolling average as defined in s. NR 666.102 (5) (f) 1. b. b. An averaging period of 2 to 24 hours as defined in s. NR 666.102 (5) (f) 2. with an instantaneous feed rate limit not to exceed 10 times the feed rate that would be allowed on an hourly rolling average basis. c. An instantaneous limit not to be exceeded at any time. (b) Carcinogenic metals. 1. The feed rates of arsenic, cadmium, beryllium and chromium in all feed streams, including hazardous waste, fuels, and industrial furnace feed stocks may not exceed values derived from the screening limits specified in ch. NR 666 Appendix I . The feed rate of each of these metals is limited to a level such that the sum of the ratios of the actual feed rate to the feed rate screening limit specified in ch. NR 666 Appendix I may not exceed 1.0, as provided by the following equation: 2. The feed rate screening limits for the carcinogenic metals are based on either of the following: a. An hourly rolling average. b. An averaging period of 2 to 24 hours as defined in s. NR 666.102 (5) (f) 2. with an instantaneous feed rate limit not to exceed 10 times the feed rate that would be allowed on an hourly rolling average basis. (c) TESH. 1. The terrain-adjusted effective stack height is determined according to the following equation: 2. The stack height (Ha) may not exceed good engineering practice as specified in 40 CFR 51.100(ii) . 3. If the TESH for a particular facility is not listed in the table in the appendices, the nearest lower TESH listed in the table shall be used. If the TESH is 4 meters or less, a value of 4 meters shall be used. (d) Terrain type. The screening limits are a function of whether the facility is located in noncomplex or complex terrain. A device located where any part of the surrounding terrain within 5 kilometers of the stack equals or exceeds the elevation of the physical stack height (Ha) is considered to be in complex terrain and the screening limits for complex terrain apply. Terrain measurements are to be made from U.S. geological survey 7.5-minute topographic maps of the area surrounding the facility. (e) Land use. The screening limits are a function of whether the facility is located in an area where the land use is urban or rural. To determine whether land use in the vicinity of the facility is urban or rural, procedures provided in ch. NR 666 Appendix IX shall be used. (f) 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 of metals emissions under an operating license or interim license shall comply with the screening limits for all such units assuming all hazardous waste is fed into the device with the worst-case stack based on dispersion characteristics. The worst-case stack is determined from the following equation as applied to each stack: (g) Criteria for facilities not eligible for screening limits. If any of the following criteria are met, the Tier I and Tier II screening limits do not apply. Owners and operators of such facilities shall comply with either the Tier III standards provided by sub. (4) or with the adjusted Tier I feed rate screening limits provided by sub. (5) . 1. The device is located in a narrow valley less than one kilometer wide. 2. The device has a stack taller than 20 meters and is located such that the terrain rises to the physical height within one kilometer of the facility. 3. The device has a stack taller than 20 meters and is located within 5 kilometers of a shoreline of a large body of water such as an ocean or large lake. 4. The physical stack height of any stack is less than 2.5 times the height of any building within 5 building heights or 5 projected building widths of the stack and the distance from the stack to the closest boundary is within 5 building heights or 5 projected building widths of the associated building. 5. The department determines that standards based on site-specific dispersion modeling are required. (h) Implementation. The feed rate of metals in each feedstream shall be monitored to ensure that the feed rate screening limits are not exceeded. (3) Tier II emission rate screening limits. Emission rate screening limits are specified in ch. NR 666 Appendix I as a function of terrain-adjusted effective stack height and terrain and land use in the vicinity of the facility. Criteria for facilities that are not eligible to comply with the screening limits are provided in sub. (2) (g) . (a) Noncarcinogenic metals. The emission rates of antimony, barium, lead, mercury, thallium and silver may not exceed the screening limits specified in ch. NR 666 Appendix I . (b) Carcinogenic metals. The emission rates of arsenic, cadmium, beryllium and chromium may not exceed values derived from the screening limits specified in ch. NR 666 Appendix I . The emission rate of each of these metals is limited to a level such that the sum of the ratios of the actual emission rate to the emission rate screening limit specified in ch. NR 666 Appendix I may not exceed 1.0, as provided by the following equation: (c) Implementation. The emission rate limits shall be implemented by limiting feed rates of the individual metals to levels 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 averaging periods are the same as provided by sub. (2) (a) 1. and 2. and (b) 2. The feed rate of metals in each feedstream shall be monitored to ensure that the feed rate limits for the feedstreams specified under s. NR 666.102 or 666.103 are not exceeded. (d) Definitions and limitations. The definitions and limitations provided by sub. (2) for the following terms also apply to the Tier II emission rate screening limits provided by this subsection: terrain-adjusted effective stack height, good engineering practice stack height, terrain type, land use and criteria for facilities not eligible to use the screening limits. (e) Multiple stacks. 1. Owners and operators of facilities with more than one onsite stack from a boiler, industrial furnace, incinerator or other thermal treatment unit subject to controls on metals emissions under an operating license or interim license shall comply with the emissions screening limits for any such stacks assuming all hazardous waste is fed into the device with the worst-case stack based on dispersion characteristics. 2. The worst-case stack is determined by procedures provided in sub. (2) (f) .