The tanks of the Space-X rocket should be emptied after a launch abort. I assume the liquid oxygen is pumped back to the storage tanks at the launch pad.

But how much oxygen is lost by evaporation?

The tanks of the Space-X rocket should be emptied after a launch abort. I assume the liquid oxygen is pumped back to the storage tanks at the launch pad.

But how much oxygen is lost by evaporation?

Is the loss replaced by tanker trucks or by a liquid oxygen plant near the launch site?