The fuel pump location appears dry. The XC70's fuel pump "lid" is on an angle at the front of the tank facing the back of the rear seat. The leak is "piddling" off the top back of the tank. The fuel filter is about a foot away, so its not that. Could it be a line or the EVAP? Are these both near the rear of the tank?
You can disconnect the fuel rail and connect a pipe to a big drum, Just insert the key and the fuel pump will prime. It will pump all the fuel out the tank into your big drum in a few minutes. I should have done this a few days ago on my tank drop but I didn't have a big drum for the fuel.
Life would be enjoyable if it wasn't so painful to live.