A technician for a large metropolitan hospital spent an $8-$hour workday servicing the

gas sterilizer system in the hospital's Central Supply Department. Her ethylene oxide

exposure was measured continuously using an infrared

spectrophotometer. Ethylene oxide TWA measurements were made for various

periods and were reported as follows.

What is the $8-$hour TWA exposure concentration in ppm and $m\frac{g}{m^3}?$ Assume Normal

temperature and pressure $($NTP$)$ and Molecular Weight $($MW$)=44\frac{g}{m}$ole