NESHAP Update on 40 CFR Part 63, Subpart MM

04 February 2020

Proposed amendments to 40 CFR Part 63, Subpart MM (National Emission Standards for Hazardous Air Pollutants for Chemical Recovery Combustion Sources at Kraft, Soda, Sulfite, and Stand-Alone Semichemical Pulp Mills) were published in the Federal Register on October 31, 2019.

The proposed amendments to 40 CFR Part 63, Subpart MM are intended to accomplish the following:
  • Add the method for setting the minimum operating limit for scrubber liquor flowrate, which was omitted in the October 11, 2017 final rule.
  • Clarify that an operating parameter limit for Automatic Voltage Control (AVC) is not required.
  • Address the method for setting the minimum operating limit for fan amperage.
ALL4 's Technical Manager, Lindsey Koos discusses the amendments in depth in her blog here: http://bit.ly/2vED8jb ALL4 is a US-based environmental consulting firm.