Control of atmospheric hazards in Confined Space:
The main cause of accidents in confined spaces, according to the Occupational Safety and Health Administration are atmospheric hazards and should preferably be eliminated before entry and kept under control during the stay of workers inside confined spaces. The concentration of contaminants, the presence of flammables and the inadequate percentage of oxygen, either due to deficiency or enrichment, are atmospheric risks that can cause intoxication and asphyxiation of workers or the formation of a