Tenant agrees not to use caustic drain cleaning chemicals in any of the drains or plumbing fixtures.

Smoking in the presence of these chemicals when they are free in the atmosphere in an enclosed space can cause death by phosgene poisoning if the refrigerant is formulated with chlorine (R-12, R-22, etc.)

You can sand it or go "passive/chemical. 

I had another house with chemical drums in the backyard, got it real cheap.

I went back to school to become a chemical engineer and worked in that field for nearly 8 years.

Panties were made of a synthetic material impervious to high heat.  

My understanding is that the EPA is beginning to ratchet up additional testing for more chemicals and certain states, and that testing of these will initially be more expensive.  

I work full time in chemical sales as well as have a side business in which i have a crew who does repair work for utility companies.

The absolute worst smokers house I've done I had to spend the money and purchase Synthetic Shellac from Sherwin Williams.

Not only that there's lots of caustic and carcinogenic chemicals all thought them.