Examples decision trees to make up IH sampling plans Ingrid Vande Velde - Information provided subject to the 'Conditions for Sharing Materials and Advice' -

Content Baseline monitoring decision tree Periodic monitoring decision tree IH exposure data

Baseline monitoring decision tree (1/3) Outcome qualitative risk assessments is input for decision tree to make up sampling plan Overview process flow: see next 2 slides (+ also Word document above)

Baseline monitoring decision tree (2/3) Continued on next slide

Baseline monitoring decision tree (3/3)

Chart of 100 industrial hygiene air sample results IH exposure data (1/2) Chart of 100 industrial hygiene air sample results y c n e u q e r F e g n a R n o i t a r t n e 2 5 5 7 5 1 1 2 5 1 5 1 7 5 c n C o n c e n t r a t i o n ( p p m ) o C IH exposure data are most of the time lognormal distributed

Geometric mean (GM) versus arithmetic mean (AM) IH exposure data (2/2) Geometric mean (GM) versus arithmetic mean (AM) GM AM y c n e u q e r F e g n a R n o i t a r t n e 2 5 5 7 5 1 1 2 5 1 5 1 7 5 c n C o n c e n t r a t i o n ( p p m ) o C Geometric mean = median of lognormal distributed data

Periodic monitoring decision tree (1/3) Outcome quantitative risk assessments (= after first IH measurements are done) is input for decision tree to make up sampling plan Overview process flow: see next 2 slides (+ also Word document above)

Periodic monitoring decision tree (2/3) Continued on next slide

Periodic monitoring decision tree (3/3)