I'd have no idea as to how to find that out. What I can say is that it came from TH&H Hardwood in San Diego (http://www.th-h.com/), and everything appears to have been sufficiently kiln dried. They stock expensive stuff too, up to $30-40/board foot. But they sell the Khaya cheap, and the guys there really seem to know their stuff.
Wish i could get wood that cheap