Tysons Galleria has an application pending before the FCC for analog/DMR repeaters on 461.6875, 461.7375, and 464.8625 and analog/DMR simplex on 469.8500, 469.8750, and 469.9000.
The mall holds a valid license for two analog repeaters, but may have decided to switch to these new frequencies because of congestion on their legacy frequencies. Here's what the mall was last monitored using:
462.2500 [ 94.8] Security (R)
464.6250 [ d132] Housekeeping (R)