In a plastic manufacturing company, propylene oxide with a molecular weight of 58.08 (TLV-TWA: 2 ppm) is being splash filled into a 200 liters storage tank with a constant filling rate of 0.002 s -1 . The filling is done through a manway of 12 cm diameter. The local ventilation rate is 0.6 m3 /s. Estimate the concentration of the propylene oxide and the percentage of fatalities if all workers in the plastic manufacturing company are exposed to propylene oxide with a vapor pressure of 538 mmHg for 1 hour. Suggest TWO (2) control measures to minimize the impact of propylene oxide exposure