That’s a “there is fuel” paperwork thing, not a plane paperwork thing. Probably would have cost that if that much fuel was in a bunch of buckets in an Oscar-Meyer Weinermobile.
It was less than 3k gallons of fuel - they probably could have dealt with it themselves (I bet someone out there would have loved to heat their house with that; it’s just really nice kerosene), had their initial reaction not been to call the authorities. After that point their hands were tied.