| Cleaning Processes Can Create a Hazardous Atmosphere in a Confined Space. |
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| Even after an empty tank has been purged, gases can desorb from porous walls or be liberated from sludge during cleaning.
Oxygen Deficiency – Oxygen can be displaced by other gases. Combustible Gases – Liberated gases can produce a combustible concentration. Toxic Gases – Toxic gases can be liberated from sludge or from cleaning solvents, or produced by chemical reactions with cleaning solvents and other materials. |
