4.69 What should the number of areas in a cargo tank to be wallwashed be based upon?a. The last cargob.* The tank capacityc. The amount of wall wash medium you haved. The age of the vessel4.70 When carrying out a wall wash test of a vessel’s cargo tank younote a number of discoloured areas on the tank surface. If thediscoloured areas are less than 20% of the tanks surface area,can you sample (wall wash) these areas and include it in yourtank sample?a.* Yesb. No
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