Marathon Petroleum wins air quality permit approval for Detroit refinery expansion

Michigan environmental regulators granted air quality permits to Marathon Petroleum and MPLX Terminals for facility expansions in Southwest Detroit, despite acknowledging the projects will increase harmful emissions including ozone-forming pollutants and sulfur dioxide. The approval came shortly after a power outage caused the refinery to flare excess gas, producing symptoms severe enough that area residents contemplated seeking urgent medical care. While the Michigan Department of Environment, Great Lakes, and Energy added stricter monitoring and reporting requirements after reviewing public comments, the permits allow expansion of rail systems and increased fuel loading operations.