EPA v. MPLX LP - Compressor Stations MACT HH & Engine Case

Case summary

(Denver, CO � April 20, 2023) - The U.S. Environmental Protection Agency (EPA), U.S. Department of Justice (DOJ), the State of North Dakota, and the State of Wyoming announced a settlement agreement with MPLX LP (MPLX) that will strengthen air pollution controls at seven natural gas processing plants and ten compressor stations located in North Dakota, Wyoming, and on the Uintah and Ouray Reservation in Utah.

Defendants (1)

• MPLX LPNamed in complaintNamed in settlement

Facilities (4)

• WONSITS VALLEY COMPRESSOR STATION

  SEC 12, T 8S, R 22E, FORT DUCHESNE, UT, 84078

  Registry ID: 110015772966

• COYOTE WASH COMPRESSOR STATION

  25 MILES SW OF VERNAL, VERNAL, UT, 84008

  Registry ID: 110043969373

• IRONHORSE COMPLEX

  25 MILES SO OF VERNAL, UTAH, UT, 84078

  Registry ID: 110063225763

• CHAPITA COMPRESSOR STATION

  40.036306, -109.425694, VERNAL, UT, 84078

  Registry ID: 110022482231

Statutes cited

• CAA 112D — MACT Standards

Enforcement conclusions (1)

• MPLX LP - Compressor Stations MACT HH & Engine Caseentered 2023-04-30

  Primary law: CAA

  Federal penalty: $1,558,100 · State/local: $441,900

Timeline (6 milestones)

• 2021-07-22Referred To Dept Of Justice
• 2021-07-27Enforcement Action Data Entered
• 2023-04-20Complaint Filed With Court
• 2023-04-30Final Order Entered
• 2023-04-30Final Order Lodged
• 2025-06-27Demand for Stipulated Penalties