On May 11, 2011, the National Institute for Occupational Safety and Health (NIOSH) received a request from the management of an automobile and scrap metal shredding facility regarding cases of Legionnaires' disease that had been identified among their workers. The request listed concerns about dusts, mists, and vapors generated during the process of shredding automobiles and scrap metal. The health concerns were Legionnaires' disease and respiratory disease. The report includes the authors' findings and recommendations.