Health hazard evaluation report: HETA-80-073-1589, Marion Power Shovel, Marion, Ohio.
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 80-073-1589, 1985 Apr; :1-53
Environmental and breathing zone samples were analyzed for methylene- bisphenyl-isocyanate (101688) (MDI), total reactive isocyanate groups (TRIG), triethylamine (121448), mineral spirits, and metal fume at Marion Power Shovel Foundry (SIC-3325), Marion, Ohio, in March and September, 1983. The evaluation was requested by the union to assess exposures in the core and mold areas where MDI binders were used. Interviews were conducted with 26 exposed and 13 nonexposed workers. Medical examinations that included pulmonary function and immunological testing, and chest X-rays were administered. All exposures were below the OSHA standards for TRIG. TRIG exposures ranged up to 558 micrograms per cubic meter. There is no current federal standard for TRIG. Exposed workers had significantly reduced 1 second forced expiratory volumes. MDI/specific immunoglobulin-G results were obtained in five workers. Seven percent of the X-rays showed signs of silicosis. Previously obtained silica (7631869) monitoring data was reviewed. Silica overexposure was indicated. Twenty seven exposed workers reported lower respiratory tract symptoms consistent with occupational asthma. The authors conclude that significant exposures to isocyanates have occurred at the facility. A health hazard due to silica also exists. Recommendations include establishing a medical surveillance program for MDI and reducing silica exposures by appropriate engineering controls.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazards-Confirmed; Power-generation; Region-5; Exposure-levels; Trace-analysis; HETA-80-073-1589;
Author Keywords: Steel Foundries; methylene bisphenyl isocyanate; MDI; coremakers; molders; Lino-cure; no-bake binder; total isocyanates; nickel; metal fumes; silica
101-68-8; 121-44-8; 7631-86-9
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health