Mold (Maybe) & Issues- Confused on next steps

[Mak K.]

So, my tenant let me know that she saw some mold. I went to the property to see with contractor to find the source which look minor issue. There is two possibility: Water leaked from refrigerator (condensation) and flowed to base plat damping it Other possibility is water line in the wall for refrigerator water may be leaking. I saw very very little damp carpet on one corner of base plate and nothing else. Tenant stated she had carpet more damp earlier and now it dried out.

The mold remediation contractor was not able to tell me cause. I had mold inspector take samples (I think I made decision too early) as I feel they will come positive as mold is everywhere in nature. Since I got the inspector, would i be forced to reinspect to have him certified the house as mold free?

Anyways, whats best way to tackle this issue. Instead of remediation company, can a normal contractor just open the wall, check the line inside and fix it? Remediation company was if water is leaking you will have to call a plumber as we donot do pluming... I am like what is the point then giving you the work?

I am confused on what should be my next step