…[H]ealth and safety shift specialists…[met]with…managers of the Phillips 66 Santa Maria Refinery...At the time, the…specialists had filed a petition to join the United Steelworkers Union…One of the specialists wrote...that the human resources manager “stated that if we voted down the union we would work towards mending the fences.”…[A] complaint [was] filed with the National Labor Relations Board, which alleges that after the specialists voted to join the union, Phillips 66 management carried out its threats...[T]he company denies that any threats were ever made against its health and safety specialists, and that subsequent modifications to their job descriptions “…were not based upon any alleged anti-union animus”...The…specialists allege company officials warned that if they joined the union they would lose hours, be stripped of managerial powers, and as many as three of them could lose their jobs…