At the conclusion of Mayday Training, the OFC was alerted to assist the Townsend Fire Company on a residential structure fire in the 600 block of Valencia Drive.  Squad 4, Rescue 24 and Command 24 responded in under a minute.  Squad 4 was first to arrive and layed in from Barcelona and Valencia.  Squad 4 pulled a line and positioned at the front door on side Alpha. Rescue 24 and Engine 24 staged for orders.  Crews were advised by Townsend Command the situation was under control.  Units packed up and returned to service within 15 minutes.   OFC Units responding: Squad 4, Rescue 24, Engine 24, Command 24