Description Between 2011 and 2018, 1,030 workers died in confined spaces in the United States alone. More than 60% of those deaths were tied to hazardous atmospheres. In many cases, the air either wasn’t properly monitored, or it changed after entry. A space can meet acceptable entry conditions at the start of the shift and still become dangerous later. Conditions outside the space or even the work inside the space can create hazards. Atmospheres are dynamic and we should treat them that way.
