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Health hazard evaluation report: HETA-85-064-1844, GTE/Valenite Corporation, Westminster, South Carolina.

Authors
Bryant CJ; Singal M
Source
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 85-064-1844, 1987 Oct; :1-26
NIOSHTIC No.
00177538
Abstract
In response to a confidential request, an evaluation of exposure to hard metal dusts was made at GTE/VALENITE Corporation (SIC-3541), Westminster, South Carolina, employing 50 production workers. Dusts were generated during finish grinding of tungsten-carbide cutting tool inserts. Personal and area air samples were analyzed for seven nitrosamines, cobalt (7440484), and tungsten (7440337). No nitrosamines were detected. Cobalt levels were nondetectable to 26.8 micrograms/cubic meter (microg/m3) (American Conference of Governmental Industrial Hygienists Threshold Limit Value, 50microg/m3). Tungsten levels were nondetectable to 0.41mg/m3 (NIOSH Recommended Exposure Limit, 5mg/m3). Medical survey of 35 workers showed respiratory symptoms associated with length of employment and smoking status. Symptoms did not correlate with exposure category. Personal air samples were taken for cobalt for ten workers giving urine samples pre and post shift. All had increased urine cobalt levels over shift. There was no correlation between total airborne and urine cobalt levels, but there was a significant association for post shift urinary and respirable cobalt. The authors recommend that air sampling for tungsten- carbide and cobalt be continued. Good housekeeping and personal hygiene practices should be instituted and maintained. Change to a safer cutting fluid is recommended along with a medical surveillance program and careful follow up of employees with persistent symptoms of cough, chest tightness, shortness of breath, or wheezing.
Keywords
NIOSH-Author; HETA-85-064-1844; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Region-4; Hazard-Unconfirmed; Cutting-tools; Metallic-dusts; Grinding-mills; Metalworking; Safety-measures; Medical-monitoring; Author Keywords: Machine Tools, Metal Cutting Types; Tungsten Carbide; Cobalt; Tungsten; Nitrosamines
CAS No.
7440-48-4; 7440-33-7
Publication Date
19871001
Document Type
Field Studies; Hazard Evaluation and Technical Assistance
Fiscal Year
1988
NTIS Accession No.
PB88-188404
NTIS Price
A03
Identifying No.
HETA-85-064-1844
NIOSH Division
DSHEFS
SIC Code
3541
Source Name
National Institute for Occupational Safety and Health
State
SC; OH
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