Rank: Forum user 
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In a pantoon roof 25 meter width and only half a meter height how many persons were allowed to perform buffing activity. The activity was being performed by compressed air. There are three manholes and forced ventilation and continous gas monitoring. Is there are any recommended practices based on air change and weadth height ratio of maximum allowable personal inside |CS. During inspection there are 12 people personal found working inside and risk assessment specified only minimum number of personal are allowed to enter .
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Rank: Super forum user
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The maximum number will be dictated by a risk assessment. One
of the limiting factors of working in a confined spaces will be the need for emergency
evacuation. If a gas emergency happens could you safely evacuate 12 people before
they are overcome?
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