Past estimates indicate that about 4% of cancer deaths in the U.S. are caused by occupational exposures; currently this is thought to underestimate the true burden of occupational cancer.1 Many of the studies that reported on the health effects of carcinogens were conducted in manufacturing. These assessments have resulted in the monitoring of and reduction in workplace exposures to carcinogens worldwide, in some cases through the development of protective standards. Exposures to carcinogens in the workplace may not result in cancer until 15-40 years later. Prevention of exposure to newly identified carcinogens is critical in order to achieve reductions in workplace attributable cancer. Based on the National Occupational Mortality Surveillance System (NOMS) (http://www.cdc.gov/niosh/topics/surveillance/NOMS/
), U.S. manufacturing workers have increased proportionate mortality to cancer before age 65. To reduce cancer in workers, preventive strategies should be used in manufacturing processes where known and potential carcinogens are used.