Commenting open: June 22, 2026 12:00AM CT - July 22, 2026 11:59PM CT.
Twin City Tanning (St. Paul) - Wastewater Permit
We invite you to comment on the draft industrial wastewater permit for Twin City Tanning.
Twin City Tanning is located at 501 Malden St., South St. Paul, Minnesota. This facility processes animal hides into chrome tanned leather.
The industrial by-product (IBP) for land application is the result of the pretreatment of wastewater from the sulfide oxidation process. None of the wastewaters containing residual chrome from the tanning process are discharged into the pretreatment system from where the IBP is generated. The IBP is land applied continuously throughout the year with a tanker truck by a licensed applicator. This occurs within two hours of leaving the facility, typically at rates of twice per day, up to four times per day. If the facility is not able to apply their by-products, it is discharged to the municipal wastewater treatment system, Metropolitan Council Environmental Services (MCES) - Metro Plant. There are two indoor 10,000-gallon tanks that store the solid material before it is transferred directly from the storage tanks to the tanker trucks for transport to the land application site. Sanitary waste is sent directly to MCES and is not covered by this permit. This facility does not discharge to surface waters.
The draft wastewater permit includes changes such as increasing IBP sampling to once per month for the standard parameters. The draft permit also includes PFAS sampling of the IBP once per year, along with a requirement to complete a PFAS Source Identification and Reduction Report by the end of the permit term.
Wastewater from industrial and commercial sources may contain pollutants at levels that could adversely affect the water quality in area wetlands, streams, rivers, and lakes. Water quality permits - or National Pollutant Discharge Elimination System (NPDES) permits - establish specific limits and requirements to protect Minnesota's surface and groundwater quality. All wastewater must be treated before it goes into surface water to protect human health and aquatic life. Permits are regularly reviewed and updated as they expire, allowing the MPCA to incorporate new information about the impacts of pollutants on the environment in future permits.
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We invite you to comment on the draft industrial wastewater permit for Twin City Tanning.
Twin City Tanning is located at 501 Malden St., South St. Paul, Minnesota. This facility processes animal hides into chrome tanned leather.
The industrial by-product (IBP) for land application is the result of the pretreatment of wastewater from the sulfide oxidation process. None of the wastewaters containing residual chrome from the tanning process are discharged into the pretreatment system from where the IBP is generated. The IBP is land applied continuously throughout the year with a tanker truck by a licensed applicator. This occurs within two hours of leaving the facility, typically at rates of twice per day, up to four times per day. If the facility is not able to apply their by-products, it is discharged to the municipal wastewater treatment system, Metropolitan Council Environmental Services (MCES) - Metro Plant. There are two indoor 10,000-gallon tanks that store the solid material before it is transferred directly from the storage tanks to the tanker trucks for transport to the land application site. Sanitary waste is sent directly to MCES and is not covered by this permit. This facility does not discharge to surface waters.
The draft wastewater permit includes changes such as increasing IBP sampling to once per month for the standard parameters. The draft permit also includes PFAS sampling of the IBP once per year, along with a requirement to complete a PFAS Source Identification and Reduction Report by the end of the permit term.
Wastewater from industrial and commercial sources may contain pollutants at levels that could adversely affect the water quality in area wetlands, streams, rivers, and lakes. Water quality permits - or National Pollutant Discharge Elimination System (NPDES) permits - establish specific limits and requirements to protect Minnesota's surface and groundwater quality. All wastewater must be treated before it goes into surface water to protect human health and aquatic life. Permits are regularly reviewed and updated as they expire, allowing the MPCA to incorporate new information about the impacts of pollutants on the environment in future permits.
Contact Information
*Indicates Required Fields