Re the Creasote treatment of power poles and other timber structures, I used to work for an electricity suply authority and would like to make you aware that there were some nasty additives to the Creasote that was used. Stuff like Clordane, Heptachlor, Tanalith and some others that worked better on Humans than on the bugs they were suposed to kill.
My advice is to be really carefull with the chips and dust, wear close fitting clothing, glovea and a propper respirator. DO NOT.....burn the chips and other waste a the chemicals will contaminate the ground and the air. Bury them somewhere where they will not contaminate ground-water or rivers etc.
Above all, take care.
The same goes for CCA (The green coloured treatment on outdoor furniture, decks and poles). Burning releases the preservative into the air, but otherwise it is fairly safe to handle, apart from the dust.

from Down-Under.
