At 2125hrs Squad 58 was dispatched on the working fire dispatch on the 1000 block of South Street. CH58 and DC58 arrived and secured the utilities in the basement of the structure. Squad 58 arrived with a crew of 5 and stoodby in the manpower pool. While responding to the scene Engine 58 was reassigned standby at Station 69A with Rescue 51. Engine responded to a fire alarm while on the standby assignment.