US: The Oregon Department of Environmental Quality (DEQ) is working with Lehigh Cement to investigate a potential source of hexavalent chromium (chromium six) emissions from a cement terminal in Portland. The environmental agency suspects that cement dust may be a contributing source of chromium six that it has monitored since March 2016 in southeast Portland. The DEQ is working with the cement company to improve its dust-capturing efforts when unloading cement from railcars.
“We're concerned about the persistence of elevated levels of chromium,” said Pete Shepherd, interim DEQ director. “We are making every effort to bring those levels down.” The DEQ has also required a nearby glass manufacturer to clean its exhaust stacks to tackle the problem.