Centralia, Washington – Heads up if you are heading North on I-5 through Washington today. All Northbound lanes are blocked in Centralia by an over turned tanker. It’s hauling four thousand gallons of used motor oil and is leaking. Washington State Patrol says its not clear how much has escaped. Haz mat crews are on their way to the scene. WSP says this could be a mess all day. The driver has been arrested for DUI.