Yesterday, eight hundred workers at the firm Vopak announced that they will go on strike in protest for better woking conditions. The workers had perviously demanded a 3% wage increase, but Vopak refused to meet their demands. The company has announced that it has no idea how many of its employees plan to participate in the strike.
See "Unions Call for Strike at Dutch Oil Firm Vopak", Reuters, April 12, 2015