Sorry, that is not U.S. DoD, but Australian Dept. of Defense.
It's ok. I've had no trouble getting H.P. graphite, the trouble is getting it even more pure. And the more pure, the better. Maybe there is not much semiconductor industry in Australia. 99.9999999% pure Si (ignoring the trace oxygen, carbon and dopants; suppliers always exaggerate) requires extreme measures.
C.W.