The Missouri Department of Natural Resources is proposing Human Health-Based Risk Assessment Levels (RALs) for cobalt and cobalt compounds for use in future air permitting requirements. The department proposes replacing the current RAL for cobalt and cobalt compounds (Chemical Abstracts Service Number 7440-48-8) with new RALs. The Missouri Department of Health and Senior Services concurred with the department's proposal.
MoDNR invites the public to review and offer written comments on the proposal until Jan. 10, 2025. MoDNR may extend the comment period 30 calendar days if it receives a written request by Jan. 5, 2025. The public can review the supporting documents below. Copies of these documents are available from the Missouri Department of Natural Resources, Air Pollution Control Program, P.O. Box 176, Jefferson City, MO 65102-0172, or by calling 573-751-4817.
Written comments or any relevant information or materials may be submitted by mail to Stephen Hall, Missouri Department of Natural Resources, Air Pollution Control Program, PO Box 176, Jefferson City, MO 65102-0176 or by email to apcppermitspn@dnr.mo.gov. Comments submitted by email are limited to 20 MB in size. Comments larger than 20 MB need to be submitted by mail to the address above.