Since there has been past discussions about arsenic being in old plaster walls I grabbed a couple chunks out of older buildings.
One was a old building downtown that I suspected to be turn of last century (1900) and the tesing on the piece came back 0 ppb
The house I sampled was built in around 1930 and the plaster chunk came back at 10 ppb.
SO arsenic does exist in plaster.
I know the limit on drinking water is 10ppb but I don’t know about air quality.
Just figured I would share this info with you guys. A arsenic test cost me very little at the local lab I use, and would add to our list of services.
I can email anyone test results if you want to see.