HHE Report No. HETA-94-0213-2469, Chemetals, Inc., New Johnsonville, Tennessee.
NIOSH 1994 Nov:19 pages
In response to a request from the International Union of Operating Engineers, an investigation was begun into possible hazardous working conditions at Chemetals, Inc. (SIC-2819), New Johnsonville, Tennessee. Some employees had experienced nose bleeds, eye irritation, chest congestion, headaches, and dizziness associated with excessive exposures to sulfuric-acid (7664939) mist and manganese (7439965) dust. The company produced high purity manganese-dioxide. Exposures to manganese exceeded the NIOSH Recommended Exposure Limit (REL) of 1mg/m3 for workers in the briquette bagging operation where time weighted average (TWA) 10 hour exposures were 7.62mg/m3. Excessive exposures were also noted at the briquette batch mixing and manganese powder 4,000 pound bagging operation where TWAs were 1.27 and 1.90mg/m3, respectively. A later visit revealed manganese exposures exceeding the short term exposure limit (STEL) of 3mg/m3 as well for workers in the briquette batch mixing area with TWAs of 1.24 and STEL measurement of 3.2mg/m3. Approximately 18% of the exposed particulate was in the respirable range. Exposures to sulfuric-acid were consistently below the REL of 1mg/m3. Notable eye and throat irritation were observed in the cell rooms, suggesting the need to implement engineering controls. The author concludes that a potential health hazard from exposure to manganese dust was found. The author recommends that exposures to manganese dust and sulfuric-acid mist be reduced.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-94-0213-2469; Hazard-Confirmed; Region-4; Metal-dusts; Acid-mists; Chemical-manufacturing-industry; Lung-irritants; Occupational-exposure; Dust-exposure;
Hazard Evaluation and Technical Assistance;
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Atlanta, Georgia, Report No. HETA-94-0213-2469, 19 pages, 16 references