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Regulations require that venting for cargo tanks in which only grades D or E liquids are to be transported shall, as a MINIMUM, be of which type? (tank barge constructed on or after July 1, 1951)
A) Branch vent lines connected to a vent header system
B) Gooseneck vents and flame screens
C) Straight vents open to atmosphere
D) Individual pressure vacuum relief valves
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