Medical survey of workers at the Interpace Corporation, Willsboro, New York.
Shasby-DM; Peterson-MR; Hodous-TK; Boehlecke-BA
Morgantown, WV: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, IWS 052.12.12, 1977 Nov; :1-22
The incidence of pulmonary disease due to Wollastonite (13983170) exposure was surveyed among workers at the Interpace Corporation (SIC-1499) in Willsboro, New York. Air samples were analyzed for trace metals, free silica (7631869), and fiber size distributions. Twenty three currently employed workers with 15 or more years of exposure underwent complete medical examinations, and current and former employees completed a health symptom questionnaire. Median fiber diameter was 0.27 micrometers and median fiber length was 2.5 micrometers. There was less than 2 percent free silica in the samples. Fiber counts revealed 0.3 fibers per cubic centimeter in the mine and 0.8 to 47.7 in the mill. Symptoms of bronchitis were present in 23 percent of the smokers and 9 percent of the nonsmokers, however symptoms were not more prevalent among current employees than among former employees, and were not related to increased exposure to Wollastonite. Five workers with more than 15 years of exposure had clubbing. The prevalence of obstruction ventilatory defects was not related to increased Wollastonite exposure. There was no evidence of lung carcinoma or mesothelioma. The authors conclude that workers exposed to Wollastonite do not have an increased risk of serious disease.
NIOSH-Author; Lung-disorders; Health-surveys; Air-sampling; Mineral-dusts; Risk-factors; Epidemiology; Silicates; Mining-industry
Field Studies; Industry Wide
NTIS Accession No.
National Institute for Occupational Safety and Health