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Health hazard evaluation determination report: HHE-77-117-444, EAZ-Lift Towing Systems, Elkhart, Indiana.
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HHE 77-117-444, 1977 Nov; :1-17
In response to a request from the United Steel Workers of America regarding possible exposure of workers involved in welding operations to smoke, a study was begun at EAZ-Lift Towing Systems, Elkhart, Indiana. The company manufactured towing hitches for trailers. All welding operations were gas metal arc (MIG). Each welding station was equipped with local exhaust ventilation. Breathing zone air samples were tested for total particulates, nickel (7440020), manganese (7439965), chromium (7440473), and iron oxides. Carbon-monoxide (630080) (CO) levels were measured using a direct reading meter, and worker exposures to CO were evaluated by measuring preshift and postshift expired CO. Except for total welding particulates, all measurements were within acceptable limits; total welding particulates exceeded the 5mg/m3 recommended level for two of nine welders. Medical questionnaires were administered to ten workers. Half the workers reported cough or congestion related to welding exposures. The author recommends that improvements be made in the exhaust ventilation system; pedestal fans were interfering with the exhaust ventilation. The author suggests that serious consideration be given to instituting medical testing prior to employment and that periodic exams be used to spot problems before they become serious.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; HHE-77-117-444; Hazard-Confirmed; Region-5; Ventilation-systems; Ventilation-equipment; Metal-fumes; Occupational-exposure; Arc-welders; Welding; Exposure-limits; Environmental-engineering; Author Keywords: Welding Operation; Iron; Fe; Nickel; Ni; Chromium; Cr; Manganese; Mn; Total Particulate; Total Welding Particulate; Carbon Monoxide; CO
7440-02-0; 7439-96-5; 7440-47-3; 630-08-0; 7439-89-6
Field Studies; Health Hazard Evaluation
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division