Open-File Report 2008–1252
The U.S. Geological Survey operates the external quality assurance project for the National Atmospheric Deposition Program/Mercury Deposition Network. The project includes the system blank and blind audit programs for assessment of total mercury concentration data quality for wet-deposition samples. This presentation was prepared to train new site operators and to refresh experienced site operators to successfully process and submit system blank and blind audit samples for chemical analysis. Analytical results are used to estimate chemical stability and contamination levels of National Atmospheric Deposition Program/Mercury Deposition Network samples and to evaluate laboratory variability and bias.
Posted October 2008
For additional information about this report, contact:
Wetherbee, G.A., and Lehmann, C.M.B., 2008, Mercury deposition network site operator training for the system blank and blind audit programs: U.S. Geological Survey Open-File Report 2008-1252, version 1.0.