The Missouri Department of Natural Resources is proposing a risk assessment level (RAL) for lead and lead compounds for use in future air permitting requirements. MoDNR is proposing to replace the current RAL for lead and lead compounds (Chemical Abstracts Service Number 7439–92–1) with the National Ambient Air Quality Standard (NAAQS) for lead. The MoDNR examined and subsequently found it appropriate to use the NAAQS for lead as the new RAL for lead and lead compounds. The Missouri Department of Health and Senior Services concurred with MoDNR's proposal.
MoDNR invites the public to review and offer written comments on the proposal until Dec. 27, 2023. MoDNR may extend the comment period 30 calendar days if it receives a written request by Dec. 22, 2023. 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, PO Box 176, Jefferson City, MO 65102-0176, 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.