Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 417 - Control of sulfur emissions
Section NR 417.06 - Total reduced sulfur limitations
Current through August 26, 2024
No person may cause, allow or permit emission into the ambient air of total reduced sulfur (TRS) in excess of the limitations in this section. All emission standards in this section are based on average daily emissions.
(1) The emission of TRS from all recovery furnace stacks may not exceed 0.50 pound of reduced sulfur compounds (as sulfur) per equivalent ton of air-dried kraft pulp, or from each recovery furnace stack 17.5 ppm, expressed as hydrogen sulfide on a dry gas basis, whichever is the more restrictive. New direct sources shall meet such other limit of TRS that proves to be reasonably attainable utilizing the latest in design of recovery furnace equipment, controls, and procedures.
(2) Noncondensibles from digesters and multiple-effect evaporators shall be treated to reduce the emission of TRS equal to the reduction achieved by thermal oxidation in a lime kiln.
