A major chicken producer has been cited by U.S. workplace safety regulators for exposing its workers to anhydrous ammonia hazards and is facing proposed fines of $122,500. The U.S. Occupational Safety and Health Administration found that Greeley, Colorado-based Pilgrim's Pride Corp. failed to use proper safety procedures, which allowed a release of 79 pounds of anhydrous ammonia and endangered workers at its Waco, Texas, facility in September 2015, the agency said Wednesday in a statement.