Beth Pierce wrote in message ...
I am reading Storey Publication No. A-139 on composters. It
states you can use treated lumber for composting bins.
Knowing you can't use it for raised beds, I'd like to know
why it can be used for one thing and not the other. Is it
because compost is a "second stage" material, ready to break
down again in the soil and soil for raised beds is not?

They screwed up that's why!

A compost bin made of PT wood would enhance the leaching of the cca
into the compost via all the bacterial and fungal activity.
Bad choice