2 different types of wood...docks or "water wood" is Marine grade. It is normally harder wood, pressure treated specifically for no or very slow release of chemicals. "Above ground wood" is normally softer wood, not treated the same, and can release poisons in water quickly.
Keitech USA Pro Staff
I did some quick google searches and found a few interesting things about treated lumber:
Is pressure treated wood safe for docks?
A: According to a number of jurisdictions across North America, yes, it is safe to use today's pressure-treated wood for docks, rafts and other water contact structures. The pressure-treated lumber you buy today does not contain arsenic, as it did up to four years ago.Aug 16, 2008
Manufacturers of pressure treated wood reached a voluntary agreement with EPA to end the manufacture of pressure treated wood for most consumer application by December 31, 2003. EPA has indicated that some stocks of wood treated with CCA b
efore this date might still be found on shelves until mid-2004. Pressure treated wood will still be available for certain commercial applications, such as wharves and bridges, where little human contact would occur.
Sounds like in 2003 the EPA required no more CCA treated lumber.
Lonnie84 thanked you for this post
I hadn't thought about it until I was reading your post but I remember warning tags on treated wood down at the big box stores pertaining mainly to cutting the wood and breathing the dust but I don't recall seeing any of them on the wood now. Maybe they still are but I don't think so, will have to take a look next time I go down there if there are no longer any tags then it sounds like no problem using it in the water.
CCA treated wood was stopped for residential application....It is still used for permanent foundations and commercial uses.
Keitech USA Pro Staff
Finished up the structures today, used up all the pipe and materials I purchased, have 118 bucks in these, and a lot of work, hope they produce. Thanks to all of you who have commented, and shared their thoughts and opinions
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They both work as I use them.