Public Comment Form

Commenting open: May 31, 2024 12:00AM CT - July 01, 2024 11:59PM CT.

POET Biorefining (Preston) - Air Permit

We invite you to comment on the draft air quality permit for POET Biorefining's facility in Preston.


POET Biorefining produces ethanol at its facility in Preston. The facility receives and mills grain, then ferments and distills the grain to produce the ethanol.


The draft air permit allows the facility to install new milling equipment, new fermentation tanks, and new control equipment to produce more ethanol on an annual basis. The permit extends existing particulate matter and volatile organic compound emission limits to the increased production rates and includes testing to make sure limits continue to be met. The permit also establishes limits on the number of trucks that can deliver grain each day. 


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 Rand Silvers
520 Lafayette Road
Saint Paul, MN 55155

*Uploading a file is optional*

You may attach up to five 20 MB files to accompany your submission. Allowed formats are pdf, jpg, jpeg, png, txt, gif, doc, docx, xlsx, xls. If you experience technical difficulties submitting your comment please contact the person listed at the bottom of this page.


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