Moisture content for thick shelf

I have a 2.5 inch slab of pecan I want to make a 10" deep, 7' long shelf with. Going inside my house. Slab was kiln dried to 9% (according to the guy that sold it to me) but is at 15% now. Am I good to use it with this much moisture still inside? No joinery, just some finish one it, likely stain. Just a solid piece of 2" thick wood with some 1/2" thick rod going thru it as floating shelf brackets.