Tenant is threatening about sign of poison

[Ann Wu]

My tenant texted me that he is showing sysdams of asbestos poison. He will be live there a full year at the end of March. My property is built in 70's and I didn't know anything of the asbestos. The property is a townhome and I never heard about any neighbor had this in the same community.  

I did some research and asked asbestos inspector. The answers are  unless you expose there all day long and breath hard for 20-30 years then yea, it MIGHT hurt you. I know this tenant is a smoker and possibly doing some illegal drugs thing. I already started the process to put him out of my property. My question is, he is asking money from me, like a lot of it. Of course I will not agree. I just want to get him out. Have anyone met the similar situation? Any advice?