Petrochemical/Refinery

    ExxonMobil

           Joliet Refinery, Channahon, Illinois

    Citgo Petroleum

           Lemont Refinery, Lemont Illinois

    Sunoco, Inc.

           Toledo Refinery, Toledo, Ohio

    Motiva Enterprises 

           Delaware City Refinery, Delaware City, Delaware

Power Generation

    Midwest Generation, An Edison International Company

           Crawford Station, Chicago, Illinois

           Wailegan Station, Waukegan, Illinois

           Joliet Station, Joliet, Illinois

           Homer City Station, Indiana, Pennsylvania

    DTE Energy (formerly Detroit Edison)

           Monroe Power Plant, Monroe Michigan

           St. Clair Power Plant, St. Clair County, Michigan

    Exelon Corporation

           Mystic Generating Station, Charleston, Massachusetts