The ACGIH TLV$-$TWA for ethyl bromide is $5ppm.$

a$.$ What does that correspond to in $m\frac{g}{m^3}?($assume NTP$)$

b$.$ Using the exposure measurements below $($taken during a single shift$),$ determine the

worker's TWA exposure. Was the TLV$-$TWA exceeded?

c$.$ If a short$-$term increase in demand results in longer work hours$/$weeks$,$ what should

the adjusted TLV$-$TWA be $($based on the ACGIH value above$)?$

Assume the new shifts are $11hrs$ per day and $6$ days per week

$($make your recommendation using the more$-$conservative estimate$).$