If they know and they are okay with that, that is one thing, if they don't know, that is very different and it requires a far different approach.Is the seller still involved? 

Bottom line, there are three solutions to this problem and none of them involve him getting free rent or you being liable.

I have clients at my W2 who didn't do this and are now paying environmental remediation companies (like the one I work at) hundreds of thousands to clean it up, by order of the EPA, even though the PREVIOUS owner caused the issue.

I went to a development walkthrough event with them in Dover, NH recently and some of the people involved are in Maine.

You probably want to get a CPA involved asap.

Luckily today their water is no longer running probably because code enforcement got involved.  

I'm at the point of just getting my eviction attorney involved and having him handle it at this point.Any opinions/advice welcomed.Thanks everyone!

Most do not accept it because they want flexibilitySo it has to go both ways - tenants and landlords should have flexibilityDictating contract terms is not something governments should get involved in.

But you may be right that it's a little too sloppy and could be cleaned up a little for ease of reading. 

If phone calls and emails are not working, get a hold of his broker and set up a meeting for all involved.