No idea on the tank, tho I'd guess such a facility would have high security; may want to budget extra time getting in and out of there?
Good point. Chris should make sure he has ALL his paperwork with him, good idea to take your passport also if you have one. Many secure facilities require TWO pieces of ID.
I've done work in areas of military bases where there was a 2 week period to get the access paperwork squared away, and over 1 hour getting the access paperwork checked over at the base.
Oh yeah, another tidbit. My retired Navy co-worker once got a traffic ticket for 'not wearing seatbelt' because he unclipped his seatbelt to get his wallet and military ID out without shutting the engine off first ! And that was just going thru to outer gate to get to the security center to have our paperwork checked and badge issued !