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• EPA settlement with MarkWest addresses Clean Air Act violations at Evans City, Pa. plant

  EPA News Release: EPA settlement with MarkWest addresses Clean Air Act violations at Evans City, Pa. plant

  • Release Date: September 25, 2020

• EPA settlement penalizes Superior Concrete Materials For Clean Air Act violations at former D.C. location

  EPA News Release: EPA settlement penalizes Superior Concrete Materials For Clean Air Act violations at former D.C. location

  • Release Date: September 2, 2020