A worker splash fills hexane (MW: 86.18; TLV-TWA: 50 ppm) into a 2642-gallon (i.e., 10 m³ volume) vessel through a 10-cm diameter filling hole. It takes about 2 hr to fill the vessel at a constant filling rate. The local ventilation rate is 150 m³/min, the ambient pressure and temperature are 1 atm (760 mm-Hg) and 25^oC, respectively. Assume average non-ideal mixing factor k for the ventilation condition. The vapor pressure of hexane can be estimated using

Antoine equation with the given constants: , where T is in K and Psat is the saturation pressure (mm Hg)

Antoine constants for hexane: A = 15.8366, B = 2697.55 and C = -48.78

Estimate the local concentration of the hexane in ppm. What observations you can make regarding workers exposure to hexane?

In(Psal) = A- B C+T