Vorpahl K W, Jordan P T, Mathews E J
Am Ind Hyg Assoc J. 1976 Oct;37(10):566-9. doi: 10.1080/0002889768507521.
Breathing zone samples obtained at a production arc welding operation employing approximately 90 welders demonstrated excessive exposure to chromium from the welding of high chromium alloy steel. Breathing zone samples were collected inside welding helmets. Methods considered for reducing employee exposure included local exhaust ventilation and the use of air-supplied helmets. Air-supplied helmets were chosen as best suited for the production scheme and suitable devices were subsequently developed that reduced breathing zone contaminant levels well below applicable standards.
