Walk-through survey report: control technology for mine assay laboratories at Rabbit Creek Mine, Winnemucca, Nevada, report no. CT-198-13a.
NIOSH 1994 Feb; :1-9
A study was conducted to document and evaluate effective technologies for the control of potential health hazards at the Mine Assay Laboratories for Rabbit Creek Mine (SIC-8734) located in Winnemucca, Nevada. The company was involved in gold mining and employed about 230 workers, eight of whom worked in the assay laboratory operation, performing about 100 fire assay samples per day. Potential hazards included exposure to lead (7439921), crystalline silica (14808607), respirable dust, mercury (7439976) and arsenic (7440382). The company used local exhaust ventilation and partial enclosures in the sample preparation, flux mixing, and fire assay areas. HEPA filtered half mask respirators were worn during hazardous tasks. The sample splitter in the sample preparation area was located in a ventilated hood. The crusher was equipped with down draft local exhaust ventilation. Compressed air at 60 pounds per square inch was used to clean dust off the work area and equipment. Ear plugs or ear muffs were worn in the sample preparation room. The author concludes that this site would be suitable for an in depth evaluation.
NIOSH-Author; NIOSH-Survey; Field-Study; CT-198-13a; Region-9; Control-technology; Mining-industry; Dust-control; Ventilation-systems; Personal-protective-equipment; Laboratory-workers; Fire-assays; Heavy-metals
7439-92-1; 14808-60-7; 7439-97-6; 7440-38-2
Control Technology; Field Studies
NTIS Accession No.
National Institute for Occupational Safety and Health