Exposure in a painting facility. All concentrations are in parts per million averaged over

the specified period. Calculate the $8-$hour TWA for each substance and calculate the

mixture TLV $($assume they cause the same health effect$).$ Report the concentration in

$ppm$ and $m\frac{g}{m^3}.$ Was the worker overexposed to any $8-$TWA$-$TLVs$?$ Mixture $8-$TWA$-$TLV

or PELs $($Look up the TLV$)?$ Assume NTP MW $=106\frac{g}{m}ol$ for Xylene, TLV of $100)$ and

$86\mathrm{.}18\frac{g}{m}ol$ for Hexane $($TLV of $50).$