Following procedures should be adopted prior to and after bunkering:
Prior loading of fuel in designated tanks atmosphere checks should be carried out and recorded, preferably 24hrs prior bunkering.
During bunkering, checks should be carried out for hydrogen Sulphide gas presence.
The likelihood of the gas generation due to the churning is high. As most of the vessel bunker tanks designs and locations do not support complete closed loading procedures, hence precautions are warranted against the exposure of hydrogen Sulphide gas to personnel.
After bunkering, gas checks should again be carried out after 24~48 hrs to re-confirm presence of any hydrogen Sulphide gas.