Units responded to the 19000 Block of Battery Park Road for a commercial fire alarm activation. 504 Arrived On-Scene to find a large commercial building with audible alarm active and water flowing out the main entrance doors of the structure. After gaining entry crews from ENG 50, ENG 51, TRUCK 51 and RESQ 50 found the water source coming from a burst sprinkler head. Salvage operations were performed within and units cleared.