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5.4.14 Recovery measurements after cleaning by air-lift pumpingThe final cleaning of KFM06C by air-lift pumping caused a draw-down of 35 m. Aftercompleted pumping, the recovery of the groundwater table was monitored. The results aredisplayed in the diagram of Figure 5-22. Pressure registration was proceeding during six hours,and the water-yielding capacity could be determined from the diagram. An inflow of >30 L/minat a drawdown of 35 m was estimated.Borehole HFM16 is located c. 40 m south of drill site DS6. The pumping activities in KFM06Crevealed a clear hydraulic connection between HFM16 at shallow levels (= 1 Minute STOP :05/06/30 22:59:59hour:minFigure 5-22. Recovery of groundwater table in section 0–1,000.43 m of KFM06C after stop of air-liftpumping.49