Please people this concerns those who know about the tricks of diesel dealers or diesel generally.A case of mixture of diesel with water happened aand it was been suggested that someone had access to the tank,stole diesel their and replaced it with water.This was a case of about 5000litres discharged and tested with hydrometer used for a while but after about 2 and half weeks it was discovered that water was coming out with the diesel from the tap used for collecting diesel from the tank.My questions are
1.Can diesel dealers discharge water with diesel without it been detected on discharge?

2.Can someone steal diesel from a tank and decide to add some water so that it would not be detected

3.note that the tank is not leaking from the top

4.How long does it take for water to settle if about 5000litres is discharged and an amount of water is added to it.

please i need an urgent answer has this has caused a lot of accusations and a lot of innocent people might be involved.

4.