The claim: Rex 84 facility, located near Lompoc & Santa Maria. Internment facility is located near the oceanside, close to Space Launch Complex #6, also called "Slick Six". The launch site has had "a flawless failure record" and is rarely used.
What it really is: First, Space Launch Complex 6 has not had a flawless launch record. Second, while the launch complex hasn't been used as much as others, it is still used (the last launch from there was in 2012).
As for the oceanside internment facility, this probably doesn't exist due to the fact that Vandenburg AFB is located two to three miles away from the coast.