When operating a hardwood renfinishing company in California who needs to have a contractors flooring license (c15)?

If it is a recirculatory hood, then it wont. Most units will work in either recirculating or extract mode - the advantage of the latter is it removes steam as well as smells.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.