The federal 7D NESHAP for Prepared Feeds Manufacturing at Area Sources (40 CFR Part 63 Subpart DDDDDDD) was adopted by the Iowa DNR in September 2014. This rule affects facilities that manufacture prepared animal feed or additives for animal feed (including feed mills) which use materials containing chromium or manganese. Facilities subject to the 7D NESHAP can no longer use the small unit exemption (SUE) and must obtain air construction permits for air contaminant sources.

All facilities subject to the 7D NESHAP that are currently using the SUE need to submit the required permit applications and fees to the Iowa Department of Natural Resources (DNR) by July 1, 2016. After July 1 enforcement action may be taken for facilities failing to comply with permitting requirements.

Since the 7D NESHAP was adopted, the DNR and Iowa Air Emissions Assistance Program (IAEAP) at the University of Northern Iowa have been helping facilities comply with 7D and identify permit requirements. Both DNR and IAEAP continue to provide assistance to facilities to ensure compliance by July 1.

Guidance on 7D NESHAP and permitting requirements is available at www.iowadnr.gov/neshap (click on Prepared Feeds). Facilities subject to the 7D NESHAP must submit an Initial Notification (IN) and Notification of Compliance Status (NOCS) to the DNR as soon as possible. (A combined IN/NOCS form for facility use is available on the DNR website.) For more information and assistance, contact the DNR or IAEAP resources listed below.