Goldsmith A H, Vorpahl K W, French K A, Jordan P T, Jurinski N B
Am Ind Hyg Assoc J. 1976 Apr;37(4):217-26. doi: 10.1080/0002889768507445.
An extensive study of a hot forging operation was performed to characterize and quantitate worker exposures to the aerosol formed by an oil-based die lubricant and it's decomposition products. Total particulate breathing zone levels up to 65 mg/m3 and benzo (a) pyrene levels up to 2.9 mug/m3 were measured.
