Like gasoline, Glen?
There's obviously some added risk to a couple oz of flammable refrigerant, but all things considered, it seems minor.
Envirosafe argues that since hydrocarbons do not react to air, there's no need to pull a vacuum. It's a controversial claim for sure. I plan to pull a vacuum in round 2 anyway and maybe just find some r12.
Hopefully I've found the house that ruptured. The hoses actually look brand new. Not sure there was an unusual leak prior to this episode.