EPA v. MACLEAN POWER SYSTEMS MANKATO LLC - ACO

Case summary

In an Administrative Consent Order (ACO), MPS has agreed to not discharge emissions exceeding 0.1 pounds of PM per ton of metal charged or 0.008 pound of total metal HAP per ton of metal charged, from the common baghouse controlling the Facility�s electric induction furnaces; install, calibrate, maintain, and operate a BLDS, and monitor it in accordance with a BLDS monitoring plan; maintain baghouses within the pressure drop range recommended by the manufacturer and/or demonstrated during a performance test to be in compliance with all applicable standards; install, operate, and maintain audible and visual alarms; initiate corrective action to determine the cause of an alarm, correct the cause of the problem and complete corrective action; document the date and time of each out-of-range pressure drop reading; conduct inspections; maintain the Facility�s scrubber within the flow rate range recommended by the manufacturer and/or demonstrated during a performance test to be in compliance with all applicable standards; implement an Operation and Maintenance (O&M) Plan; provide records, monitoring data and semi-annual reports; and submit a permit application to MPCA that incorporates these requirements and associated changes at the facility. The ACO will bring the facility into compliance within one year. MPS will pay a $78,373 civil penalty under the CAFO. Contacts: Maria Gonzalez, ORC, (312) 886-6630; Jacob Herbers, ECAD, (312) 886-0405; Charles Zeman, ECAD, (312) 353-4741.

Defendants (1)

• MACLEAN POWER SYSTEMS MANKATO LLCNamed in complaintNamed in settlement

Facilities (1)

• MACLEAN POWER SYSTEMS MANKATO LLC

  200 ROCK ST, MANKATO, MN, 560013473

  Registry ID: 110000426726

Statutes cited

• CAA 112 — Hazardous Air Pollutants
• CAA 110 — Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Enforcement conclusions (1)

• MACLEAN POWER SYSTEMS MANKATO LLC - ACOentered 2026-10-27

  Primary law: CAA

Timeline (2 milestones)

• 2026-10-27Final Order Issued
• 2026-10-29Enforcement Action Data Entered