The email said it goes in order of your security clearance date…Not specific on any facility but I have worked at one on that list. Pick one with good training %, relatively decent staffing, and you're willing to be at for 3-5 years. If you're dead set on a facility or location submit your list as fast as possible. It's a first come first served. You wait to think about it you'll likely receive the 3rd or 5th on your list.