Commenting open: July 26, 2022 12:00AM CT - August 25, 2022 04:30PM CT.
Co-operative Plating - Air Permit
We invite you to comment on the draft air quality permit for Co-operative Plating Company in St. Paul.
Co-operative Plating Company is a metal finishing facility that operates 18 separate metal coating lines that process different base metals, including steel, brass, copper, and aluminum. Pollutants of concern from Co-operative Plating are particulate matter (PM), PM less than 10 microns (PM10), PM less than 2.5 microns (PM2.5), hazardous air pollutants, and acid and metal particulates.
The new draft air permit for Co-operative Plating has an annual operating limit for plating operations equipment and degreasing equipment of 8,000 hours to ensure the facility’s emissions are below the Minnesota Department of Health’s health benchmark values. The permit also requires the Co-operative Plating to change its degreaser from trichloroethylene (TCE), which is now banned in Minnesota, to N-Propyl bromide (nPB, also known as 1-Bromopropane).
An air quality operating permit is required for existing facilities that emit or potentially emit 10 tons per year or more of hazardous air pollution, or 25 tons per year or more of a combination of hazardous air pollution. The permit includes all requirements for operation and procedures, applicable rules, emission standards, monitoring, recordkeeping, and reporting. If additional conditions change and modifications to the permit are necessary, the MPCA may review and amend the permit.