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ANSI/AIHA/ASSE Z9.7-2007
Recirculation of Air from Industrial Process Exhaust Systems
This newly updated guideline establishes the minimum criteria for the design and operation of recirculating exhaust systems used for contaminant control in the workplace. Harmful concentrations of air contaminants can be created in the work environment if done incorrectly. Possible safety problems are addressed, as are the materials and processes used to identify industrial process-generated contaminants.
The American Society of Safety Engineers [asse]