Air Quality | Calumet Montana Refining LLC

The Department of Environmental Quality has prepared a Proposed Permit regarding Operating Permit #OP2161-23, for Calumet Montana Refining LLC.

Location:

• NE 1/4, Section 1, Township 2 North, Range 3 East
• Cascade

Associated Materials:

• Proposed Operating Permit #OP2161-23
• Technical Review Document #TRD2161-23

EPA Review Period Ends: 

• July 27, 2026 11:59PM

Contact: Craig Henrikson

---

Tags: Air and Public Notice