At low fluid loss the filling process continues as follows:
Filling of T1 to shaft top. The drop of the fluid level in the shaft is measured and recorded.

After approximately 30 minutes the loss of injection fluid is replaced by refilling it up to the top of the shaft. Due to the hydrostatic pressure the injection agent penetrates the leaks resp. seeps through these into the soil. The injection agent T1 remains in total approximately 45 minutes in the rehabilitation section and is then pumped out by vacuum pumps.