An alleged cover-up involving air pollution at the Westward Seafoods plant in Unalaska has landed two former employees in jail.

James Hampton, 45, has been sentenced to 70 days in prison. Hampton was the engineer who used to oversee Westward’s powerhouse -- and a system for reducing nitrogen dioxide emissions from it. But a federal investigation revealed that equipment was hardly ever used between 2009 and 2011 on Hampton’s watch.

Raul Morales was one of the employees working under Hampton at the time. Morales, 53, was the powerhouse supervisor. He’s been sentenced to 45 days in prison for helping pass fake emissions data to Westward managers, state regulators, and the Environmental Protection Agency.

Morales and Hampton were originally facing up to two years in prison for their violations of the Clean Air Act. They both agreed to plead guilty.

So has their old co-worker, Bryan Beigh. Beigh was an operator at the powerhouse when he allegedly used a magnet and a drill to tamper with the air emissions system. The goal, according to prosecutors, was to make it look operational.

Beigh will be sentenced in U.S. District Court in late November.