This marks the first time the call letters, "KMG365" in response to a call. The call sign is a real FCC call sign used by LACoFD assigned to Fire Station 98 in Bellflower, and it appears on the Station Patch for Station 127, which today still houses Engine 127 and Truck 127. Station 127 is the station that was used for the exterior shots of Station 51.
The refinery rescue was shot directly across the street from the Station 51 location in Carson CA, which can be glimpsed in the background.
The trailer section of the overturned gasoline tanker is the same one used in the 1971 film Duel (1971), but with a different paint scheme.