$($a$)$ Supporting document $2$ is the Woodworking Monthly trade magazine

article that the SM was reading.

$($i$)$ Explain the meaning of occupational exposure limits for wood dust

that are assigned in law:

Note: Your answer should be based on supporting document $2$

only.

$($ii$)$ Explain the significance of the 'typical exposure level' reported in

the study.

Note: Your answer should be based on supporting document $2$

only.

$($iii$)$ Explain the likely distribution of the wood dust in the respiratory

tract of the workers exposed to the wood dust.

Note: Your answer should be based on supporting document $2$

only.

$($b$)$ Supporting document $2$ suggests what an employer must consider

when controlling exposure to hazardous substances such as wood dust.

What approach must an employer consider when deciding how to control

exposure to wood dust?

$($c$)($i$)$ Table $1$ in supporting document $4$ is an extract from the $O{H}^{\text{'}}s$

report.

Calculate the $8-$hour time$-$weighted average $($TWA$)$ exposure to

wood dust for Worker $x.$

Note: Your answer should be based on information in supporting

document $4$ only.

$($ii$)$ Now that the $SM$ has the $OH\text{'}$s report $($supporting document $4),$

they can draw further conclusions.

Based on the information in the report, what was good about the

approach taken by the $OH?$

$($iii$)$ Based on the SM$\text{'}$s discussion with Worker $x,$ assumptions were

made about Worker $x\text{'}$s exposure to wood dust.

Use the information in the $OH\text{'}$s report to show that these

assumptions might be incorrect.

Note: Your answer should be based on supporting document $4$

and the scenario only.

$($iv$)$ Suggest reasons why the $OH$ is recommending a detailed survey of

workers' exposure to wood dust.

$($v$)$ The $OH$ made some recommendations in their report $($see

supporting document $4).$ One of these recommendations was to

carry out a detailed survey of workers' exposure to wood dust.

What should the $OH$ consider when designing this detailed survey?

$($d$)$ Explain what practical control measures $KH$ could consider to reduce

their workers' exposure to wood dust.

Note: Your answer must be based on the scenario only.