As an advice, always closely monitors what's beeing done with fuel in this part of the world....Jet A is not always sold in drums by fuel companies, so "agents" sometime buy used drums, clean them more or less carefully and fill them from a shuttling tank.
I know an operator who lost most of a seismic contract last year,and about 100 fuel drums because of continous filter clogging. The drums here, had contained oil palm and had be cleaned with water ! (surprise, surprise !) of course the "agent" didn't atend the debriefing !
