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Health hazard evaluation report: MHETA-81-108-9006, Consolidation Coal Company, Central Machine Shop 20, Cadiz, Ohio.
Cornwell RJ; Hodgson M
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, MHETA 81-108-9006, 1982 Jan; :1-18
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; Author Keywords: Bituminous Coal and Lignite; Welding; Chromium VI; Nickel
7439-96-5; 7439-89-6; 10028-15-6; 10102-44-0; 630-08-0; 18540-29-9; 7440-02-0
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division