Cache is NOT at the posted Co-ordinates. Rather, they are the start of an adventure. Good luck.
Arriving at the posted co-ordinates you will face glass double doors. Enter them, turn right and go through the next door, then ascend to the next level. Here search for R 796.14 M2324g. When you have your prize, follow the instructions to the final. This cache is available only during the following hours: Mon-Thurs 9 - 9; Fri 9-5; Sat 9-5; Sun 1-5. This cache placed with the permission and co-operation of the staff. You might give them a hearty caching "thanks."
Congratulations to the Treasure Trovers (VA) for a very respectable FTF. So let it be written; so let it be done.