If you are playing realistic and staff your Airport stations with the actual units they have, not all of them have 8 ARFF unit.
Using my set up for example Tampa airport is one airport (4ARFF), McDill AFB (4ARFF), so that would make up the difference, but other airports in my set up do not have the luxury of having a military base there. Even Cape Canaveral only has 5 that I can find. An incident like this at Tampa Airport would require a response from almost every fire station in Hillsborough and Pinellas County to get 75 engines, 20 heavy squads and 20 Ladders on site. That equates to 25 Strike teams of engines or perhaps 30 Task Forces. It is simply not realistic.
I definitelyagree with chief, the requirements are wayyyyy over the top, the few times iv had this mission - iv treated all the patients then coined the mission. Please devs look at this.