HHE Determination Report No. HHE-77-67-499, St. Clair Rubber Company, Marysville, Michigan.
Environmental and medical surveys were conducted on April 25 to 28, 1977, and October 26 and 27, 1977, to evaluate employee exposures to ethylene-thiourea (96457) (ETU) at the St. Clair Rubber Company (SIC- 2891, SIC-3069), in Marysville, Michigan. The evaluation was requested by an authorized representative of United Rubber Workers, Local 47, on behalf of 175 affected employees. Air samples were analyzed, and workers completed medical questionnaires and were given thyroid function tests. Hypothyroidism was confirmed only in one worker, although several reported symptoms consistent with this disease. When powdered ETM was used, airborne dust concentrations ranged up to 77 micrograms per cubic meter. After a nonpowdered dispersion form of ETU was substituted, airborne dust concentrations were significantly reduced. The authors conclude that no hazard existed at the time of the survey; however, a potential hazard is indicated by results of thyroid function tests in two workers that bordered on significance. They recommend that the medical surveillance program be expanded, that the use of the newly introduced solid form of ETU be maintained, that first aid facilities be inspected more frequently, that personal hygiene education be provided to prevent exposure to dangerous chemicals, that the local exhaust ventilation system be replaced and improved, and that workers use gloves when handling ETU compounds.
Hazard Evaluation and Technical Assistance Branch, NIOSH, Cincinnati, Ohio, Report No. HHE-77-67-499, 27 pages, 6 references