The dataset contains concentrations of toxicants in breath and urine collected from study participants. This dataset is not publicly accessible because: EPA cannot release personally identifiable information regarding living individuals, according to the Privacy Act and the Freedom of Information Act (FOIA). This dataset contains information about human research subjects. Because there is potential to identify individual participants and disclose personal information, either alone or in combination with other datasets, individual level data are not appropriate to post for public access. Restricted access may be granted to authorized persons by contacting the party listed. It can be accessed through the following means: By contacting CDC/NIOSH. Format: The dataset contains concentrations of toxicants in breath and urine collected from study participants.

This dataset is associated with the following publication: Fent, K., C. Toennis, D. Sammons, S. Robertson, S. Bertke, A. Calafat, J. Pleil, A. Wallace, S. Kerber, D. Smith, and G. Horn. Firefighters' and instructors’ absorption of PAHs and benzene during training exercises. INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH. Elsevier B.V., Amsterdam, NETHERLANDS, 222(7): 991-1000, (2019).