Aircraft Refuelling

[Go-Go Juice]

I am doing an indepth study into aircraft refuelling procedures. Can you please help me. Any information you can give will help to build a better picture of how we can improve things in the future.
Include procedures that you think need to be changed to give a better service, standards and not forgetting health and safety.
Also which are the better companies, airports etc......

Thanks for your help and assistance