Implementation of human biomonitoring in the Dehcho region of the Northwest Territories, Canada (2016–2017)

Table 3 Follow up Health-Based Tissue Guidance (HBTG) values used during the Human Biomonitoring in the Dehcho Region of the Northwest Territories (2016–2017)

Contaminant	Sample	Regular Follow-up	Early Notification
Mercury	Hair	> 5 μg/g^a (2 μg/g)^a	> 25 μg/g^a (10 μg/g)^a
Mercury	Blood	> 20 μg/L^c (8 μg/L)^{c, e}	> 100 μg/L^{c, d, e} (40 μg/L)^c
Mercury	Urine	> 25 μg/L^h
Cadmium	Blood	> 5 μg/L^{b, d, f}
Cadmium	Urine	> 7.3 μg/L^b
Lead	Blood	> 100 μg/L^{d, g} (50 μg/L)	> 200 μg/L^{b, d, g} (100 μg/L)^{b, d}
Lead	Urine	> 7 μg/L^b
Uranium	Urine		> 15 μg/Lⁱ

The values are identified according to the vulnerability level of individuals to contaminants: for the group considered as least vulnerable such as men over the age of 17 and women over the age of 45, as well as for the most vulnerable group, including minors and women of childbearing age(males 6–17 years of age and females 6–45 years of age)
^aDelormier, T, 2012. Synopsis of Research Conducted Under the 2010–2011 Northern Contaminants Program
^bHaines, D.A., et al., 2011. Reporting results of human biomonitoring of environmental chemicals to study participants: a comparison of approaches followed in two Canadian studies
^cLegrand, M., et al., 2010. Methylmercury Blood Guidance Values for Canada
^dNieboer E, et al., 2013. Nituuchischaayihtitaau Aschii Multi-community Environment-and-Health Study in Eeyou Istchee 2005–2009
^eSmith, L., et al., 2009. Maternal-Infant Research on Environmental Chemicals (MIREC)- Managing Maternal Blood Mercury Levels
^fSmith, L., et al., 2008. Maternal-Infant Research on Environmental Chemicals (MIREC)- Managing Maternal Blood Cadmium Levels
^gSmith, L., et al., 2008. Maternal-Infant Research on Environmental Chemicals (MIREC)- Managing Maternal Blood Lead Levels
^hSchulz et al., 2011. Update of the reference and HBM values derived by the German Human Biomonitoring Commission
ⁱAgency for Toxic Substances and Disease Registry, 2009. Case Studies in Environmental Medicine (CSEM) - Uranium Toxicity

ISSN: 2049-3258