Layoffs at ConocoPhillips' Trainer refinery, which is in the process of being shut down, will occur during the last two weeks of January 2012.
That's according to a filing with the Pennsylvania Department of Labor & Industry.
In all, 409 workers will lose their jobs when ConocoPhillips permanently closes the Delaware County refinery it has owned since 2002. That refinery can process up to 185,000 barrels of crude oil per day, but it is one of several that the oil company has targeted for closure.
Companies are required to provide 60 days advance notice of any major plant closing. ConocoPhillips announced in late September that it had put the 91-year-old refinery on the Delaware River up for sale and immediately began the process of idling the complex.