Chapter NR 464

NR 464.02(42) (42) “Sulfite pulping” means a chemical pulping process that uses a mixture of sulfurous acid and bisulfite ion as the cooking liquor.

NR 464.02(43) (43) “Temperature monitoring device” means a piece of equipment used to monitor temperature and having an accuracy of +1.0% of the temperature being monitored expressed in degrees Celsius or +0.5 degrees Celsius (°C), whichever is greater.

NR 464.02(44) (44) “Thermal oxidizer” means an enclosed device that destroys organic compounds by thermal oxidation.

NR 464.02(45) (45) “Turpentine recovery system” means all equipment associated with recovering turpentine from digester system gases including condensers, decanters, storage tanks and any other equipment serving the same function as those previously listed. The turpentine recovery system includes any liquid streams associated with the turpentine recovery process such as turpentine decanter underflow. Liquid streams that are intended for byproduct recovery are not considered turpentine recovery system condensate streams.

NR 464.02(46) (46) “Weak liquor storage tank” means any storage tank except washer filtrate tanks containing spent liquor recovered from the pulping process and prior to the evaporator system.

NR 464.02 History History: CR 00-175: cr. Register March 2002 No. 555, eff. 4-1-02.

NR 464.03 NR 464.03 Standards for the pulping system at kraft, soda and semi-chemical processes.

NR 464.03(1) (1) The owner or operator of each pulping system using the kraft process subject to the requirements of this chapter shall control the total HAP emissions from the following equipment systems, as specified in subs. (3) and (4):

NR 464.03(1)(a) (a) At existing affected sources, the total HAP emissions from the following equipment systems shall be controlled:

NR 464.03(1)(a)1. 1. Each LVHC system.

NR 464.03(1)(a)2. 2. Each knotter or screen system with a total HAP mass emission rate greater than or equal to the rate specified in subd. 2. a. or b. or the combined rate specified in subd. 2. c.:

NR 464.03(1)(a)2.a. a. Each knotter system with emissions of 0.05 kilograms or more of total HAP per megagram of ODP (0.1 pounds per ton).

NR 464.03(1)(a)2.b. b. Each screen system with emissions of 0.10 kilograms or more of total HAP per megagram of ODP (0.2 pounds per ton).

NR 464.03(1)(a)2.c. c. Each knotter and screen system with emissions of 0.15 kilograms or more of total HAP per megagram of ODP (0.3 pounds per ton).

NR 464.03(1)(a)3. 3. Each pulp washing system.

NR 464.03(1)(a)4. 4. Each decker system that does one of the following:

NR 464.03(1)(a)4.a. a. Uses any process water other than fresh water or paper machine white water.

NR 464.03(1)(a)4.b. b. Uses any process water with a total HAP concentration greater than 400 parts per million by weight.

NR 464.03(1)(a)5. 5. Each oxygen delignification system.

NR 464.03(1)(b) (b) At new affected sources, the total HAP emissions from the equipment systems listed in par. (a) 1., 3. and 5. and all of the following equipment systems shall be controlled:

NR 464.03(1)(b)1. 1. Each knotter system.

NR 464.03(1)(b)2. 2. Each screen system.

NR 464.03(1)(b)3. 3. Each decker system.

NR 464.03(1)(b)4. 4. Each weak liquor storage tank.

NR 464.03(2) (2) The owner or operator of each pulping system using a semi-chemical or soda process subject to the requirements of this chapter shall control the total HAP emissions from the following equipment systems, as specified in subs. (3) and (4).

NR 464.03(2)(a) (a) At each existing affected sources, the total HAP emissions from each LVHC system shall be controlled.

NR 464.03(2)(b) (b) At each new affected source, the total HAP emissions from each LVHC system and each pulp washing system shall be controlled.

NR 464.03(3) (3) Equipment systems listed in subs. (1) and (2) shall be enclosed and vented into a closed-vent system and routed to a control device that meets the requirements specified in sub. (4). The enclosures and closed-vent system shall meet the requirements specified in s. NR 464.08.

NR 464.03(4) (4) The control device used to reduce total HAP emissions from each equipment system listed in subs. (1) and (2) shall do one of the following:

NR 464.03(4)(a) (a) Reduce total HAP emissions by 98% or more by weight.

NR 464.03(4)(b) (b) Reduce the total HAP concentration at the outlet of the thermal oxidizer to 20 parts per million or less by volume, corrected to 10% oxygen on a dry basis.

NR 464.03(4)(c) (c) Reduce total HAP emissions using one of the following:

NR 464.03(4)(c)1. 1. A thermal oxidizer designed and operated at a minimum temperature of 871°C (1600 °F) and a minimum residence time of 0.75 seconds.

NR 464.03(4)(c)2. 2. A boiler, lime kiln or recovery furnace by introducing the HAP emission stream with the primary fuel or into the flame zone.

NR 464.03(4)(c)3. 3. A boiler or recovery furnace with a heat input capacity greater than or equal to 44 megawatts (150 million British thermal units per hour) by introducing the HAP emission stream with the combustion air.

NR 464.03(5) (5) Periods of excess emissions reported under s. NR 464.11 are not a violation of subs. (3) and (4) provided that the time of excess emissions, excluding periods of startup, shutdown or malfunction, divided by the total process operating time in a semi-annual reporting period does not exceed any of the following levels:

NR 464.03(5)(a) (a) One percent for control devices used to reduce the total HAP emissions from the LVHC system.

NR 464.03(5)(b) (b) Four percent for control devices used to reduce the total HAP emissions from the HVLC system.

NR 464.03(5)(c) (c) Four percent for control devices used to reduce the total HAP emissions from both the LVHC and HVLC systems.

NR 464.03 History History: CR 00-175: cr. Register March 2002 No. 555, eff. 4-1-02.

NR 464.04 NR 464.04 Standards for the pulping system at sulfite processes.

NR 464.04(1) (1) The owner or operator of each sulfite process subject to the requirements of this chapter shall control the total HAP emissions from the following equipment systems as specified in subs. (2) and (3):

NR 464.04(1)(a) (a) At existing sulfite affected sources, the total HAP emissions from all of the following equipment systems shall be controlled:

NR 464.04(1)(a)1. 1. Each digester system vent.

NR 464.04(1)(a)2. 2. Each evaporator system vent.

NR 464.04(1)(a)3. 3. Each pulp washing system.

NR 464.04(1)(b) (b) At new affected sources, the total HAP emissions from the equipment systems listed in par. (a) and all of the following equipment shall be controlled:

NR 464.04(1)(b)1. 1. Each weak liquor storage tank.

NR 464.04(1)(b)2. 2. Each strong liquor storage tank.

NR 464.04(1)(b)3. 3. Each acid condensate storage tank.

NR 464.04(2) (2) Equipment listed in sub. (1) shall be enclosed and vented into a closed-vent system which routes emissions to a control device that meets the requirements specified in sub. (3). The enclosures and closed-vent system shall meet the requirements specified in s. NR 464.08. Emissions from equipment listed in sub. (1) that do not need to be reduced to meet sub. (3) are not required to be routed to a control device.

NR 464.04(3) (3) The total HAP emissions from both the equipment systems listed in sub. (1) and the vents, wastewater and condensate streams from the control device used to reduce HAP emissions shall be controlled as follows:

NR 464.04(3)(a) (a) Each calcium-based or sodium-based sulfite pulping process shall do one of the following:

NR 464.04(3)(a)1. 1. Emit no more than 0.44 kilograms of total HAP or methanol per megagram (0.89 pounds per ton) of ODP.

NR 464.04(3)(a)2. 2. Remove 92% or more by weight of the total HAP or methanol.

NR 464.04(3)(b) (b) Each magnesium-based or ammonium-based sulfite pulping process shall do one of the following:

NR 464.04(3)(b)1. 1. Emit no more than 1.1 kilograms of total HAP or methanol per megagram (2.2 pounds per ton) of ODP.

NR 464.04(3)(b)2. 2. Remove 87% or more by weight of the total HAP or methanol.

NR 464.04 History History: CR 00-175: cr. Register March 2002 No. 555, eff. 4-1-02.

NR 464.05 NR 464.05 Standards for the bleaching system.

NR 464.05(1) (1) Each bleaching system that does not use any chlorine or chlorinated compounds for bleaching is exempt from the requirements of this section. Owners or operators of the following bleaching systems shall meet all the provisions of this section:

NR 464.05(1)(a) (a) Bleaching systems that use chlorine.

NR 464.05(1)(b) (b) Bleaching systems bleaching pulp from kraft, sulfite or soda pulping processes that use any chlorinated compounds.

NR 464.05(1)(c) (c) Bleaching systems bleaching pulp from mechanical pulping processes using wood, or from any process using secondary or non-wood fibers, that use chlorine dioxide.

NR 464.05(2) (2) The equipment at each bleaching stage of the bleaching systems listed in sub. (1) where chlorinated compounds are introduced shall be enclosed and vented into a closed-vent system which routes emissions to a control device that meets the requirements specified in sub. (3). The enclosures and closed-vent system shall meet the requirements specified in s. NR 464.08. If process modifications are used to achieve compliance with the emission limits specified in sub. (3) (b) or (c), enclosures and closed-vent systems are not required.

NR 464.05(3) (3) The control device used to reduce chlorinated HAP emissions, not including chloroform, from the equipment specified in sub. (2) shall do one of the following:

NR 464.05(3)(a) (a) Reduce the total chlorinated HAP mass in the vent stream entering the control device by 99% or more by weight.

NR 464.05(3)(b) (b) Achieve a treatment device outlet concentration of 10 parts per million or less by volume of total chlorinated HAP.

NR 464.05(3)(c) (c) Achieve a treatment device outlet mass emission rate of 0.001 kg of total chlorinated HAP mass per megagram (0.002 pounds per ton) of ODP.

NR 464.05(4) (4) The owner or operator of each bleaching system subject to sub. (1) (b) shall comply with par. (a) or (b) to reduce chloroform air emissions to the atmosphere, except the owner or operator of each bleaching system complying with extended compliance under s. NR 464.01 (1) (e) 1. to 3. shall comply with par. (a). The owner or operator shall:

NR 464.05(4)(a) (a) Comply with the following applicable effluent limitation guidelines and standards specified in 40 CFR part 430:

NR 464.05(4)(a)1. 1. Dissolving-grade kraft bleaching systems and lines, 40 CFR 430.14 to 430.17.

NR 464.05(4)(a)2. 2. Paper-grade kraft and soda bleaching systems and lines, 40 CFR 430.24(a) (1) and (e), and 40 CFR 430.26(a) and (c).

NR 464.05(4)(a)3. 3. Dissolving-grade sulfite bleaching systems and lines, 40 CFR 430.44 to 430.47.

NR 464.05(4)(a)4. 4. Paper-grade sulfite bleaching systems and lines, 40 CFR 430.54(a) and (c), and 40 CFR 430.56(a) and (c).

NR 464.05(4)(b) (b) Use no hypochlorite or chlorine for bleaching in the bleaching system or line.

NR 464.05 History History: CR 00-175: cr. Register March 2002 No. 555, eff. 4-1-02.

NR 464.06 NR 464.06 Standards for kraft pulping process condensates.

NR 464.06(1) (1) The requirements of this section apply to owners or operators of kraft processes subject to the requirements of this chapter.

NR 464.06(2) (2) The pulping process condensates from the following equipment systems shall be treated to meet the requirements specified in subs. (3), (4) and (5):

NR 464.06(2)(a) (a) Each digester system.

NR 464.06(2)(b) (b) Each turpentine recovery system.

NR 464.06(2)(c) (c) Each evaporator system condensate from both of the following:

NR 464.06(2)(c)1. 1. The vapors from each stage where weak liquor is introduced (feed stages).

NR 464.06(2)(c)2. 2. Each evaporator vacuum system for each stage where weak liquor is introduced (feed stages).

NR 464.06(2)(d) (d) Each HVLC collection system.

NR 464.06(2)(e) (e) Each LVHC collection system.

NR 464.06(3) (3) One of the following combinations of HAP-containing pulping process condensates generated, produced or associated with the equipment systems listed in sub. (2) shall be subject to the requirements of subs. (4) and (5):

NR 464.06(3)(a) (a) All pulping process condensates from the equipment systems specified in sub. (2) (a) to (e).