Describe use at the time
Say whether leakage occurs while filling the sink, emptying it or running the disposer. Mention any recent sink or mounting work.
Assess the connection
Mounting seals, alignment and other connections can look alike once wet. An engineer can inspect the installation and model before deciding whether repair is appropriate. Do not tighten mountings blindly beneath a heavy unit.
A useful distinction
A wet mounting area can be affected by the sink above it as well as the appliance connection. Include any tap or sink-edge leak already noticed so the inspection does not begin with a false source.