Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 464 - National emission standards for hazardous air pollutants from the pulp and paper industry
Section NR 464.04 - Standards for the pulping system at sulfite processes

Universal Citation: WI Admin Code § NR 464.04

Current through August 26, 2024

(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):

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

1. Each digester system vent.

2. Each evaporator system vent.

3. Each pulp washing system.

(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:

1. Each weak liquor storage tank.

2. Each strong liquor storage tank.

3. Each acid condensate storage tank.

(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.

(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:

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

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

2. Remove 92% or more by weight of the total HAP or methanol.

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

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

2. Remove 87% or more by weight of the total HAP or methanol.

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