At ~ 9:34 PM, Westmoreland 911 dispatched Station 20 (Murrysville VFC) for an Automatic Fire Alarm (AFA) at Heritage Elementary School, on School Road North. Station 20 responded with 8 firefighters (including Lieutenant 20) going to the station to crew Truck 20 and Engine 20. Westmoreland 911 also dispatched the following stations to support Station 20: Station 64 (White Valley VFC), Station 22 (Export VFC), Station 78 (Sardis VFC), Station 236 (Holiday Park VFC), and Station 610 (Murrysville Medic One). All responding stations were cancelled when a school district representative informed Westmoreland 911 that a nighttime painting crew had accidently tripped the Heritage School AFA System. Truck 20 and Engine 20 remained in service and in station.