EPA v. DETROIT DIESEL CORPORATION - ACO

Case summary

An Administrative Consent Order (ACO) for Detroit Diesel Corporation, Detroit, Michigan was issued to address violations regarding the Michigan State Implementation Plan (SIP), at R 336.1301(1)(a), and conditions of its 2022 Air Permit. Specifically, Detroit Diesel Corporation violated the Michigan SIP opacity limit of a 6-minute average of 20% opacity, except for one 6-minute average per hour of not more than 27% opacity, and failed to report opacity limit exceedances in its semi-annual deviation report for July 2023 through December 2023. We discovered these violations through a Section 114 Information Request, in which Detroit Diesel installed a continuous opacity monitoring system on its diesel engine test cell stack for 30 days in accordance with EPA Performance Specification 1, and through obtaining Detroit Diesel?s latest semi-annual deviation report from Michigan EGLE. A concurrent CAFO for a penalty of $125,397 has been agreed to by Detroit Diesel and is currently being routed for signature and approval. This ACO requires Detroit Diesel to install and operate a baghouse system to control emissions from the engine testing bays at the facility to maintain the 20% opacity levels required under the Michigan SIP, create a dust handling protocol, and establish an opacity monitoring program to addresses the violations set forth in the NOV issued to Detroit Diesel on April 16, 2024.

Defendants (1)

• DETROIT DIESEL CORPORATIONNamed in complaintNamed in settlement

Facilities (2)

• DETROIT DIESEL CORPORATION

  13400 WEST OUTER DRIVE, REDFORD, MI, 48239

  Registry ID: 110000407202

• DETROIT DIESEL CORPORATION

  13400 WEST OUTER DRIVE, REDFORD, MI, 48239

  Registry ID: 110000407202

Statutes cited

• CAA 112D — MACT Standards
• CAA TITLE5 — Title V Permits

Enforcement conclusions (1)

• DETROIT DIESEL CORPORATION - ACOentered 2026-08-31

  Primary law: CAA

Timeline (2 milestones)

• 2026-08-31Final Order Issued
• 2026-09-01Enforcement Action Data Entered