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Health hazard evaluation report: HETA-85-415-1806, Eccles Saw and Tool Company, Cincinnati, Ohio.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 85-415-1806, 1987 Jul; :1-18
In response to an employee request, an evaluation was made of metal dust exposures from the process of sharpening saw blades and tools at the the Eccles Saw and Tool Company (SIC-3541), Cincinnati, Ohio. In two personal air samples, the following concentrations were determined: cobalt (7440484), 26 and 63 micrograms/cubic meter (microg/m3); tungsten (7440337), 365 and 925microg/m3; nickel (7440020), 3.9 and 9.3microg/m3; cadmium (7440439), less than 2microg/m3; and silver (7440224), less than 2microg/m3. Air containing cobalt at 30microg/m3 and nickel at 7microg/m3 was being discharged back into the workspace from the recirculated local exhaust ventilation air. A medical evaluation was performed on three workers; all three reported coughing four to six times a day, four or more days per week, with occasional episodes of wheezing. Two of these employees were grinders, having been working at this company for 15 and 85 months, while the other was a truck driver, who spent about 3 hours per day in the shop, but did no grinding. Appreciably higher cobalt levels were noted in the urine of a worker exposed to cobalt at 63microg/m3 than in office workers. The authors conclude that at least one worker was exposed to an excessive cobalt concentration. The authors recommend general improvements in the housekeeping practices in the grinding shop, modification of the present local exhaust ventilation system, preplacement and periodic medical examinations of employees, and limiting exposure to cobalt.
NIOSH-Author; HETA-85-415-1806; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazard-Confirmed; Region-5; Metal-fumes; Metal-dusts; Dust-inhalation; Pulmonary-system-disorders; Metalworking-industry; Machinists; Author Keywords: Machine Tools, Metal Cutting Types; Tungsten Carbide; Cobalt; Tungsten; Nickel
7440-48-4; 7440-33-7; 7440-02-0; 7440-43-9; 7440-22-4
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division