We are surrounded by superfund sites, and every stream I've found has warnings about contamination.  

This will avoid contaminating all of your businesses with "dealer status".Dealer status may also apply to operating as a sole proprietorship (buying/selling in your personal name), so be careful and get expert tax advice.I am not a lawyer or accountant, so ignore everything I just said and get your own professional advisor.

Another problem you could end up with is, by introducing alot of fresh water the system could become contaminated if your boiler water is treated.

Let's say you get your way, that anything goes as you believe so long as it doesn't "hurt" anyone else.That would mean you can have a tenant that puts on the red light and has strangers over at all hours going through your building, that would be okay so long as they were quiet and didn't hurt anyone.It also means that your tenants could legally sit inside and smoke crack, getting high and contaminating the unit, after all, it would be perfectly leagl.

Unless you are trained and certified in safe remediation techniques, taking your own measurements with a moisture meter is pretty useless and self diagnosis and removal of materials that are suspected to be contaminated is a bad idea.

Have a professional cleaning crew clean up the crime scene area, contaminated rooms, just as an added piece of mind for the new owners.

Maybe you'll try to hide meth contamination?  

It also contaminated the whole unit.

I don't know the rules in that area but it might be good protection for you to get your tenant out of the property and put them up in a hotel because there is so much that can put you at great risk with a flood, instances are (contaminated water, electrical current in the water that hasn't been identified, and of course the risk of mold or other air born contaminates) that might affect someone living in the home.

Plus the area may or may not be contaminated;)