Chief wasn't working communications this morning. He worked yesterday, and the 6 PM shift was probably on when the call when out (sounded like they were there until a little after 10 today).
With that said, if they called Benedict for the pumper-tanker, it sounds like Hollywood failed on the initial to get both pieces out. The dispatch procedure for a house (or chimney fire now) for St. Mary's is three engine companies, a truck and an ambulance. For New-Market Turner Rd, it would be 2/22 for the engines, Charles 2 for the engine and 7 for the engine/truck.
They put La Plata in service because we try to keep mutual aide out of the county as much as possible. No knock or gripe on the mutual aide, but we (and the dispatchers) want us to be self-sufficient. We'd like Charles units to stay in Charles for their first due, and Calvert to stay in Calvert, especially with special service units. Yes, La Plata was closer, and yes, they can tell the dispatchers where they are. That's the best thing to do. If they try to put you in service, tell the dispatcher 'I'm at X and X.' Dispatcher will look it up, see your closer and tell you to continue in and return whatever unit was late to mark up.
It's complicated anymore, but it sounds like Mechanicsville did get atleast one piece out.