Way to go, OP. Now you have triggered electronic surveillance of yourself.
What am I saying? ALL Americans are surveilled, regardless of what anyone says or does. :R
Ask away, we're all bad guys now. After all, RVers are able to exist off the grid, practicing regularly just for fun.
Okay, rant over. Your question is a very good one, even if the terminology is off a little. These hazards can be of greater concern in the small, enclosed spaces with very close bulk storage of such chemicals (waste tanks).
Good question, also good advice from those above.