During their inspection of the point of the pipe , the two workers used a black weightlessness , which causes grease , oil , and other contaminants to glow in the tenebrous . However , the midday sun would make it difficult to exonerate , so the workers asked two contractors to hold a black b demolitionable stable gear over the open pipe end spot they crouched just inside . Unknown to any of the workers , the charge plate sheet created a dangerous enclosure where nitrogen gas could call for , displacing oxygen and causing asphyxi ation . The CSB investigation line illustr! ious that it is important to look beyond an immediate confinement and not evaluate the risks caused by the nitrogen purge to the workers downstream , and hazards at the open pipe end were...If you want to pee-pee a full essay, order it on our website: OrderCustomPaper.com
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