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(4) If a diver becomes aware of any oil or other contaminant in waters in which a diving operation is being conducted, the diver must immediately inform the supervisor of the contaminant.
(5) If a diving supervisor becomes aware of any oil or other contaminant in waters in which a diving operation supervised by the supervisor is being conducted, the supervisor must take all necessary steps to avoid any contamination of any diver in the water and of the ambient atmosphere in any compression chamber used in the diving operation.
