In-Depth Survey Report: Control Technology for Controlling Worker Exposure to Asphalt Fumes from Roofing Kettles: Kettle Operated Using the FRS-6000(Trade Name) Filtration Unit at Dana Corporation, Columbus, Ohio

摘要

The five-day average of TP, BSF, and PAC exposures were 1.58 mg/m3, 1.08 mg/m3, and 186 microg/m3 respectively to the kettle operators, 0.34 mg/m3, 0.12 mg/m3, and 22 microg/m3 respectively in the area and building samples, and 0.77 mg/m3, 0.37 mg/m3, and 75 microg/m3 respectively to the roof-level crew. Whether the FRS-6000 filtration unit is used or not, these data show the kettle operator is being exposed to levels of asphalt fume higher than any other roofing worker. This puts the kettle operator at the highest risk of adverse health effects. There was no significant correlation between the square foot of roof replaced (i.e., asphalt used) in a day and the IP, BSF, and PAC exposures to the kettle operator for that day. This is most likely due to the kettle operator loading fewer asphalt kegs (l or 2) each time the kettle lid is opened during days where usage is low. During high asphalt use days, the kettle operator tends to load more kegs (3 or 4) each time the kettle is opened but does not necessarily open the door more often than on low usage days. This observation is site specific and largely a function of the kettle size used and the kettle operator's work habits.