According to Duane Bozarth :
Ed Clarke wrote:

Old PT lumber is known as CCA... ... People have died by burning
this stuff in a woodstove.

You have any documentation/citation for that claim? I'd be real
surprised to hear of any that were specifically CCA-caused that wouldn't
have also occurred w/ non-CCA material from CO, for example.

CCA contains arsenic. Burning CCA creates trace quantities
of AsH3 (Arsine). Arsine is rather hideously toxic.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.