And its also safe to say that the tank should be pumped even more frequently if it's older than 10-15 yrs in age,Bio-mat or a black slimy substance tends to clog most leaching fields over time.

If it's a dime-a-dozen rate/term COVID refi for a w2 employee who owns a single house, has great credit, and has been on the job 2+ years, it probably makes zero difference (will neither help, nor harm, the borrower).

Then just a few tools of that substance in other areas.

I don't see any harm in requesting the the PM to cover the cost.

Did you use a do-it-yourself mold test kit to determine whether the black substance is mold?  

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

It is fun to hear this banter from time to time because it is entertaining, but it has reached epic proportions and I honestly think it is harming our country for people to be feeding on this negativity and distrust.

For newbies, the key is you can do harm in any path.  

The label on the RoundUp package indicates that affected areas can be replanted within a few weeks, so that tells me it does not remain harmful in the soil for too long.