Will a pressure treated 10"x10" wood timber float in water?

http://www.madsci.org/posts/archives/mar98/888747058.Bt.r.html

http://www.oregonpine.com/productmanual2003.pdf
The density of douglas fir is <30 pounds/ft^3.  The density of water
is 62 pounds/ft^3.  So about half of the 10x10 would be above water.

Assuming the wood is dry to begin with, it could eventually take on
enough water to sink.