We had the person fixing the plugged line address both units and verify that there was no more leakage into the lower unit.  

Basically it must be sealed to keep any ground water out and any water that does get in (either through leakage or flooding above) must be pumped out.

I am working with my PM comany to investigate water leakages or tenant misuse but beyond that any suggestions on how to handle this situation? 

Seal Gaps and Cracks: Ensure a tight seal around pipes, wires, and other penetrations to prevent sound leakage. 2.

Hi BP community, My tenant, who lives in a two-story, newer construction SFH complained of a water leakage in the bottom floor kitchen ceiling (through the LED lights).

Direction Cracks that run diagonally or horizontallyCracks that run at a 45-degree angleOther signs Cracks that appear suddenlyMultiple cracks, especially if clustered togetherCracks that widen over timeDoors and windows that don't close properlySagging ceilings or leaning wallsSigns of water leakage  -------------------------------------Just annoying stuff...fun, huh?

They said they will send someone in 2 weeks.I checked around the house looking for water signs of leakage.

Most significant are environmental issues centering around past or present leakage of petroleum products into the ground. 

The house just got foundation repaired, and obviously there’s a leakage at some point.

If you're coming in short monthly to cover these, identify where the "leakage" is.