Health hazard evaluation determination report: MHETA-81-108-9006, Consolidation Coal Company, Central Machine Shop 20, Cadiz, Ohio.
Employee exposure to welding fumes and solvents at the Consolidation Coal Company Central Machine Shop 20 (SIC-1211), Cadiz, Ohio, was investigated. The Mine Safety and Health Administration (MSHA) requested the study following worker reports of alleged excessive morbidity and mortality. The study was performed on February 22 to 24, 1982. About 75 individuals were employed at the shop. Personal and area air samples were collected. Airborne concentrations of manganese (7439965), iron (7439896), fluorides, ozone (10028156), nitrogen-dioxide (10102440), and carbon-monoxide (630080) were below applicable NIOSH recommended limits. Twenty percent of the samples for chromium (VI) (18540299) exceeded or equaled the NIOSH standard of 0.001 milligrams per cubic meter (mg/m3), having values of 0.002 and 0.001mg/m3. Three of eight nickel (7440020) samples obtained for welders in the blacksmith shop showed time weighted averages of airborne nickel in excess of the NIOSH standard of 0.015mg/m3. The authors conclude that welders in the blacksmith shop are exposed to chromium(VI) and nickel, both of which are carcinogenic. Recommendations include improved ventilation systems, use of metal fume respirators and tinted spectacles, and worker education.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; MHETA-81-108-9006; Hazards-Confirmed; Region-5; Mining-industry; Heavy-metals; Machine-shop-workers; Metallic-fumes; Ventilation; Respiratory-protective-equipment; Time-weighted-average-exposure
7439-96-5; 7439-89-6; 10028-15-6; 10102-44-0; 630-08-0; 18540-29-9; 7440-02-0
Hazard Evaluation and Technical Assistance; Field Studies
NTIS Accession No.
Mining Health Hazard Evaluation and Technical Assistance Program, NIOSH, Morgantown, West Virginia, 18 pages, 8 references