Background Level 08
Background Level 08 :
The amount of an agent in a medium (e.g., water, soil) that is not attributed to the source(s) under investigation in an exposure assessment. Background level(s) can be naturally occurring or the result of human activities. (Note: natural background is the concentration of an agent in a medium that occurs naturally or is not the result of human activities). Valerie Zartarian, Tina Bahadori and Tom McKone. Adoption of an official ISEA glossary. Journal of Exposure Analysis and Environmental Epidemiology (2005) 15, 15. doi: 10.1038/sj.jea.7500411 Published online 24 November 2004
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