Question 96Safety & Environmental - Assistant Engineer

The correct answer is C) dirty ballast. Water ballast placed in a tank that has been crude oil washed, but not water rinsed, shall be regarded as dirty ballast. This is because the tank has not been adequately cleaned to remove all traces of the crude oil, and the water ballast will become contaminated with the remaining oil residues. Dirty ballast must be handled and disposed of as oily waste, in accordance with pollution prevention regulations. The other options are incorrect because: A) the ballast is not the crude oil itself, B) segregated ballast refers to ballast in dedicated tanks that are kept separate from cargo or fuel oil tanks, and D) the ballast cannot be considered clean since the tank has not been properly rinsed.