December 20, 2005 - At 1305 hrs, Engine and Tower 501 responded on the mutual box for a reported explosion at 7415 Peppertree Lane, in the Yorkshire section of Prince William County. On arrival, Engine 508 found an active gas fed fire. Engine 501 arrived and picked up 508's line. Crews from both companies operated hose lines to extinguish involved debris and cool the piles while awaiting the arrival of the gas company. It appeared that during demolition of this particular trailer, the contractor struck the still active gas line to the home, causing an explosion. This was the same trailer that burned in September of 2005. The Tower cleared quickly and the Engine went ready at 1444 hrs.