During their oversight of the interior of the pipe , the two workers used a relentless exonerated , which causes grease , oil , and other contaminants to glow in the moody . However , the midday sun would make it herculean to appreh decease , so the workers asked two contractors to hold a grim elastic planing machine over the open pipe decease art object they crouched just inside . Unknown to whatever of the workers , the plastic sheet created a dangerous enclosure where north gas could get together , displacing oxygen and causing suffocation . The CSB investigation report famous that it is important to look beyo nd an immediate task and not evaluate the ri! sks caused by the nitrogen purge to the workers downstream , and hazards at the open pipe end were...If you want to get a full essay, order it on our website: OrderEssay.net
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