Accepting comments from November 12, 2025, through December 12, 2025.

The Idaho Department of Environmental Quality (DEQ) seeks comment on a draft Tier II operating permit for Ruveon LLC.

Ruveon LLC owns and operates an elemental phosphorous manufacturing facility near Soda Springs, Idaho. The company is seeking to modify and renew its Tier II operating permit for an air pollution-emitting source—a nodulizing kiln that prepares phosphate ore for use in the furnace feedstock and emits exhaust gas through four stacks. After installing a GORE™ Mercury Control System (GMCS) for monitoring air pollution emissions, Ruveon LLC is proposing reduced short-term and long-term testing frequency on the GMCS.

DEQ has determined that operation according to the proposed permit will not cause or significantly contribute to a violation of any ambient air quality standard and will not injure or unreasonably affect human or animal life or vegetation. DEQ has reviewed the application and completed an analysis of the information submitted by the applicant to amend the mercury testing schedule and renew the Tier II operating permit. Based on this analysis, DEQ proposes to issue the Tier II operating permit to Ruveon LLC, Soda Springs.

The draft permit materials are available for public review at DEQ’s State Office (1410 N. Hilton St.) and on DEQ’s website. Written comments on the draft permit and supporting materials will be accepted through December 12, 2025, at 5 p.m. MT. Submit comments using the form below or via mail or email to:

Dianne Hobbs
1410 N. Hilton St.
Boise, ID 83706
dianne.hobbs@deq.idaho.gov

For technical assistance on questions concerning this project or the permitting process, contact Spencer Patton at (208) 373-0142 or spencer.patton@deq.idaho.gov.

Related Documents

Permit materials

Accessibility Services: The Idaho Department of Environmental Quality will provide reasonable language access services and/or disability services for documents at no charge. To request an accommodation under Title VI of the Civil Rights Act of 1964 or Americans with Disabilities Act, contact DEQ’s nondiscrimination coordinator at (208) 373-0271 or accessibility@deq.idaho.gov. Para obtener información en español, visite https://www.deq.idaho.gov/about-us/accessibility/.