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. Author manuscript; available in PMC: 2022 Mar 16.

Published in final edited form as: Environ Res. 2020 Oct 10;193:110302. doi: 10.1016/j.envres.2020.110302

Figure 4. — Performance in the NYS Biomonitoring PT Program is shown for As (4a), Cd (4b), Hg (4c), and Mn (4d) in urine over four years of participation (2016–2019) as a function of target value. The solid line represents no difference between the lab-reported value and the assigned value, while the dashed lines show ± quality specifications for each analyte. CHEAR data are shown as open black circles; other participant data are shown as gray circles.

Figure 4. — Performance in the NYS Biomonitoring PT Program is shown for As (4a), Cd (4b), Hg (4c), and Mn (4d) in urine over four years of participation (2016–2019) as a function of target value. The solid line represents no difference between the lab-reported value and the assigned value, while the dashed lines show ± quality specifications for each analyte. CHEAR data are shown as open black circles; other participant data are shown as gray circles.