Crews are resuming the search for nine people presumed killed at a Washington state paper mill where a chemical tank ruptured. It's likely to be one of the deadliest U.S. workplace accidents in years. Authorities on Wednesday said the presumed death toll rose to 11 after a second person died. Authorities says there's no hope of finding more survivors following Tuesday’s tank failure at the Nippon Dynawave Packaging Co. in Longview. Some contamination made its way into the nearby Columbia River. Authorities say the tank failure hasn't impacted the region's air or drinking water, but testing is ongoing.