Medical call dispatched near Lock Drive and Boulder Drive Heard on: Fairfax County VA Regional Fire Dispatch 00:22 00:00 Engine 438, medic 415, on channel 4 Bravo, box 43803, EMS level 1, (number withheld) Lock Drive, Cross Street, Boulder Drive. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 Engine 438, medic 415, on channel 4 Bravo, box 43803, EMS level 1, (number withheld) Lock Drive, Cross Street, Boulder Drive. 00:11 Engine 438, medic 415, on channel 4 Bravo, box 43803, EMS level 1, (number withheld) Lock Drive, Cross Street, Boulder Drive. 2026-10-22 08:23 UTC Medical Emergency Lock Dr, Centreville, VA 20120 View on map