EPA v. MACLEAN POWER SYSTEMS MANKATO LLC (DOTSON) - APO/CAFO

Case summary

Region 5 filed a Consent Agreement and Final Order (CAFO) under Section 113(d) of the Clean Air Act (CAA), commencing and concluding an action alleging MPS Mankato, LLC d/b/a Dotson Iron Castings (?MPS?), violated the National Emission Standards for Hazardous Air Pollutants for Iron and Steel Foundries Area Sources (NESHAP Subpart ZZZZZ) and the Minnesota State Implementation Plan (SIP) at its foundry at 200 West Rock Street, Mankato, Minnesota (the ?Facility?). The CAFO alleged MPS is a new affected source under NESHAP Subpart ZZZZZ and exceeded the emission limit of 0.1 pounds of PM per ton of metal charged for new affected sources, as verified by performance stack test results; and failed to install, operate, and maintain a bag leak detection system (BLDS) as required of new affected sources. The CAFO also alleged that MPS failed to operate its control equipment within the operating ranges specified in its State Permit as required by the Minnesota SIP; report deviations of operating parameters outside those ranges; and maintain control equipment monitoring records.

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 (DOTSON) - APO/CAFOentered 2026-10-29

  Primary law: CAA

  Federal penalty: $78,373

Timeline (3 milestones)

• 2026-10-29Final Order Issued
• 2026-10-29Complaint Filed/Proposed Order
• 2026-10-29Enforcement Action Data Entered