The document summarizes a case before the Ontario Labour Relations Board regarding whether three construction companies - Borea Construction, Pomerleau Ontario Inc., and D.H. Blattner & Sons Inc./Blattner Energy Inc. - should be considered a single employer or if there was a sale of business that binds Borea to certain union agreements. It provides background on how Borea was originally created through a joint venture between American company Blattner and Quebec-based Genivar to build wind farms in Canada. When Genivar later sold its interest in Borea to Pomerleau, the union sought to bind Borea to the same agreements as Pomerleau. The document discusses the history and operations of each