In article ,
"len" writes:
|
| I would start with the assumption that is Copper arsenic treated wood. I
| would think that a retaining wall is ground contact, which requires either
| pressure treated lumber or some rot resistant wood, like cedar, redwood, or
| cypress. Realy expensive. Maybe, you could replace the wall with some
| masonry or stone. If it is treated lumber, it is getting close to its life
| expectantcy. And, the more the wood deteriorates, the more the toxins leach
| into soil.

Well, yes, but it isn't taken up by plants much, and you need some
arsenic in your diet anyway. Compared with the poisons omitted by
motor vehicles, it is insignificant. If it weren't, Wales would
have become uninhabitable centuries ago.

Don't Panic.


Regards,
Nick Maclaren.