I'm sure there are environmental issues with this, but I would be terrified of a fire - even years after the treatment.

This is much of the reason why Lake Erie sees bigger and bigger algae blooms every year (due in part to farm runoff from NW Ohio and overflow of the environmental disaster that is the Detroit sewer system).

This could become a major environmental issue for you.

They will have to pull out 4 million septic tanks because they will flat to the surface like bobbers if flooded and pollute the area.

12+ hours is nothing hahaHmm things during a 12 hour day--You could be on phone all day dealing with loan underwriting, due diligence if done yourself can literally be a 24-7 thing if you get into environmental, legal, title, physical, insurance etc.There's a lot of variables too what types of deals are you doing?  

Do EPA superfund sites pass Environmental review from commercial banks?

It will protect you and the lender somewhat if for example there is a big environmental lawsuit against the property in the LLC.

Other factors (social, environmental, geographical, etc) also have an impact.

Philly was the land of unequal opportunity where certain blocks have more pollution, crime, problems.

land without development rights (development rights TDR sold) and an environmental easement established