Current Intelligence Bulletin 68: NIOSH Chemical Carcinogen Policy
NIOSH Docket Number 240-A, CDC-2013-0023
The National Institute for Occupational Safety and Health of the Centers for Disease Control and Prevention published a final document entitled “Current Intelligence Bulletin 68: NIOSH Chemical Carcinogen Policy” on December 27, 2016. Underlying this policy is the recognition that there is no known safe level of exposure to a carcinogen, and therefore that reduction of worker exposure to chemical carcinogens as much as possible through elimination or substitution and engineering controls is the primary way to prevent occupational cancer. Accordingly, this policy no longer uses the term recommended exposure limit (REL) for chemical carcinogens; rather NIOSH will only recommend an initial starting point for control, called the Risk Management Limit for Carcinogens (RML-CA). For each chemical identified as a carcinogen, this level corresponds to the 95% lower confidence limit of the risk estimate of one excess cancer case in 10,000 workers in a 45-year working lifetime. Keeping exposures within the risk level of 1 in 10,000 is the minimum level of protection and striving for lower levels of exposure is recommended. When measurement of the occupational carcinogen at the RML-CA is not analytically feasible at the 1 in 10,000 risk estimate, NIOSH will set the RML-CA at the limit of quantification (LOQ) of the analytical method. In addition, NIOSH will continue to evaluate available information on existing engineering controls and also make that information available when publishing the RML-CA.
The foundation on which the NIOSH chemical carcinogen policy is built is cancer hazard classification. To avoid government duplication and to utilize transparent and systematic assessments, NIOSH will rely on existing cancer hazard assessments completed by the U.S. Department of Health and Human Services (HHS) National Toxicology Program (NTP), the U.S. Environmental Protection Agency (EPA) Integrated Risk Information System (IRIS), and the World Health Organization International Agency for Research on Cancer (IARC).
The development of the NIOSH chemical carcinogen policy involved rigorous and transparent processes for public, peer, and stakeholder review. A public review period and public meeting provided opportunities and a forum for discussion about the draft document, as well as opportunities to solicit feedback and comments, and to allow stakeholders and the public to make presentations to NIOSH. All written comments submitted in response to the external review, including materials presented at the public meeting and the meeting transcript, have been considered and are made available as part of the public record.
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- Federal Register Notice: Federal Register Notice: 68849
- Draft Current Intelligence Bulletin: Update of NIOSH Carcinogen Classification and Target Risk Level Policy for Chemical Hazards in the Workplacepdf icon
- Final Document: Current Intelligence Bulletin 68: NIOSH Chemical Carcinogen Policy pdf icon[PDF – 2 MB]
- Revised Final Document: Current Intelligence Bulletin 68: NIOSH Chemical Carcinogen Policypdf icon