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Health hazard evaluation report: HETA-93-0608-2423, Unitron Industries, Inc., Port Huron, Michigan.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, HETA 93-0608-2423, 1994 May; :1-28
In response to a request from employee and management representatives of Unitron Industries, Inc. (SIC-3842), Port Huron, Michigan, a study was conducted of possible hazardous exposures to chemicals used in making hearing aid molds. Employees in the hearing aid mold manufacturing laboratory were concerned about the ventilation parameters, and whether chemicals would have acute or long term health effects. Excessive exposures to methylene-chloride (75092), and possibly to ethyl-2-cyanoacrylate (7085850), were found. Subsequently, the company installed new ventilation systems. During a second survey, the worker exposures had been reduced to not detectable levels in most instances. Medical interviews suggested the workers were experiencing symptoms consistent with their chemical exposures and that the severity and frequency of these symptoms had notably improved with the implementation of the new engineering controls. The authors conclude that a health hazard existed from exposure to methylene-chloride and ethyl-2- cyanoacrylate; changes made to the ventilation systems appear to have reduced worker exposures to acceptable levels. The authors recommend measures to maintain current exposure levels and to alleviate other identified deficiencies.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-0608-2423; Hazard-Confirmed; Region-5; Organic-solvents; Solvent-vapors; Ventilation-equipment; Occupational-exposure; Laboratory-workers;
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division