Health hazard evaluation report: HETA-81-126-926, Silver Systems LTD., Chamblee, Georgia.
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 81-126-926, 1981 Jul; :1-10
Worker exposures to hydrogen-cyanide (74908) (HCN) gas were surveyed on January 29, 1981 at Silver Systems, Ltd. (SIC-3341) in Chamblee, Georgia. The evaluation was requested by the company's general manager on behalf of nine employees. HCN gas exposure was suspected from the use of a silver-cyanide solution used during the silver recovery process from exposed photographic and X-ray film. Area and personal breathing zone samples were collected for analysis. Two employees were questioned about work related health problems. The average full shift exposure to HCN for the barrel man was 7.7 parts per million (ppm) with exposure increasing to a peak of 12.4ppm during barrel changeover. Exposures were below the OSHA 8 hour time weighted average standard of 10ppm. No work related health effects were reported. Area samples contained 8 to 12ppm of HCN during the morning hours, but concentrations declined during the rest of the day. The author concludes that an HCN exposure hazard exists for the barrel man, and a potential hazard exists for other workers who spend prolonged time in contaminated areas. Recommendations include improved ventilation, use of respiratory protection, availability of cyanide exposure treatment kits, and worker education on HCN exposure hazards and symptoms.
NIOSH-Author; HETA-81-126-926; NIOSH-Health-Hazard-Evaluation; Hazards-Confirmed; Region-4; Health-surveys; Toxic-gases; Workplace-studies; Work-practices; Industrial-processes; Occupational-health-programs; Air-contamination; Air-quality-measurement; NIOSH-Technical-Assistance-Report;
Author Keywords: Secondary Smelting and Refining of Nonferrous Metals; Hydrogen Cyanide; Cyanogram; Sodium Cyanide; Silver Recovery
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health