The Avondale Fire Company was alerted to relocate to station 22 (West Grove) while they were on a working fire in Maryland. Engine 23-2 went enroute with 5 personel to 22. Minutes later the commander requested the fourth alarm. Engine 23-2 went responding seconds later. The engine crew got to the scene and soaked down hot spots and helped with overhaul. The crew was released at 1245 hours.