Public Comment Form

Commenting open: June 25, 2025 12:00AM CT - July 25, 2025 11:59PM CT.

Spectro Alloys Corp - Air Permit

We invite you to comment on the draft air quality permit for Spectro Alloys Corp.


Spectro Alloys is an aluminum processing plant in Rosemount that recycles aluminum scrap into usable product. The facility’s main processes are furnaces, casting conveyors, and other natural gas-fired heating equipment.


The draft permit authorizes construction of additional furnaces for billet production and requires more testing for particulate matter, total hydrocarbons, hydrochloric acid, and dioxins and furans from the additional equipment.


An air quality operating permit is required for certain existing facilities or the construction of new facilities that have the potential to emit a significant level of any regulated pollutant. The permit includes all requirements for operation and procedures, applicable rules, emission standards, monitoring, recordkeeping, and reporting. If additional conditions change and modifications are necessary, the MPCA may review and amend the permit.



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Thank you for providing feedback on this project. We value your comments and will use them to assess this project further.


In your comments, please state your interest in the permit application or the draft permit; the explicit actions you wish the MPCA to take, including specific references to the section of the draft permit you believe should be changed; and the reasons supporting your position, stated with sufficient specificity as to allow the MPCA to investigate the merits of the position.


If you want to submit a letter, you can upload the letter on this website or submit it via US Mail to the following address:


Minnesota Pollution Control Agency
c/o Jesse Loi
520 Lafayette Road
Saint Paul, MN 55155

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