Extension of Comment Periods

Pre-publication notice to extend the comment periods for National Emission Standards for Hazardous Air Pollutants: Mercury Cell Chlor-Alkali Plants, Primary Magnesium Refining, Flexible Polyurethane Foam Fabrication Operations, Refractory Products Manufacturing, Carbon Black Production, and Cyanide Chemicals Manufacturing Residual Risk and Technology Reviews.

• 02/12/2021 - Pre-publication proposed rule; extension of public comment period (pdf) (237.36 KB)
  Comment period extension for several RTRs