Health hazard evaluation determination report: HHE-78-84-581, Harbison-Walker Refractories, Clearfield, Pennsylvania.
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 78-84-581, 1979 Apr; :1-17
Medical and environmental evaluations were conducted from July 10 to 14, 1978 at facilities Numbers 1 and 3 of the Harbison-Walker Refractories (SIC-5085) in Clearfield, Pennsylvania. The evaluations were in response to an authorized employee request to determine whether exposures to refractory dust were causing silicosis and other lung problems among approximately 310 employees. Work atmosphere and personal air samples were analyzed for quartz (14808607) and cristobalite (14464461) content. Medical interviews, chest x-rays, spirometry tests, and chest examinations were performed on 227 workers. Respirable crystalline quartz concentrations (less than 0.5 to 33.0 milligrams per cubic meter) exceeded the OSHA standard of 10 milligrams per cubic meter divided by the silicon-dioxide (7631869) percentage plus 2 for dust with more than 5 percent silicon-dioxide at operation sites. Respiratory complaints were common, but no evidence of silicosis or reduction of pulmonary function was observed. Recommendations resulting from the evaluation include establishing a periodic ventilation maintenance program; providing medical examinations to all exposed workers; and initiating medical evaluations of employees with respiratory or pulmonary problems to determine possible job re-assignment.
NIOSH-Author; HHE-78-84-581; NIOSH-Health-Hazard-Evaluation; Region-3; Industrial-supplies; Hazard-Unconfirmed; Airborne-dusts; Air-sampling; Respiratory-system-disorders; Ventilation-systems; Work-environment; Occupational-health-programs;
Author Keywords: Refractory Dust; Quartz; Silicosis; Lung Problems; Chest X-Rays; Pulmonary Function Tests
14808-60-7; 14464-46-1; 7631-86-9
Field Studies; Health Hazard Evaluation
NTIS Accession No.
National Institute for Occupational Safety and Health