permaculture

[venaurafarm <venaurafarm@bellsouth.net>]

On 1/22/2013 1:13 AM, Neil Bertrando wrote:
> Does non-arsenic mean non-toxic? my understanding is that the newer
> treatment is copper based but I haven't tracked down the complete component
> list or seen good info on the effects/toxicology.

It uses copper sulphate and borax. There may be other chemicals used 
also but the copper sulphate would be the only obviously toxic component
and that is mild. In a greenhouse I would definitely paint this wood as 
condensation on the surface of the wood might leach small amounts of 
this onto tables, the soil, etc.

No CCA is used in PT lumber any more other than in industrial 
applications. CCA = Chromated Copper Arsenate, i.e. contains arsenic.

> not that this means it is non-toxic, but is it approved by OMRI/NOP for
> Organic Production?

I have no idea.