Hi,

Oh yes, I forgot to mention, that the refrigerant is there is not toxic or even harmful to the human skin in its gaseous or in a vapor released form.
It's only when you get liquid refrigerant splashed on you that you can get frost bit. This happens like when it evaporates or "boils off" rapidly.
Just like alcohol gets colder, to the skin, but then again it's not starting out "under pressure" to a possible minus 20 degrees in its bottle either.
The oil in the system is only a few ounces of a base similar to mineral oil and might be edible, to some extent, it just is a low wax oil.
It might act like castor oil in your bowels though? Not something to keep around in a man cave as a mixer or for salads for those healthy type fellows! (:-)

Like Dave said, you can go and have it evacuated, but if it's not cooling you probably have around 20 psi in there.
If so, that might be about a quarter pound of refrigerant. There are not many cubic feet gas at that low of pressure in there. If they really did save it, like good boys are suppose too do, they would have to have a cylinder just for contaminated refrigerant to be sent for reclaim or disposal!

Remember all of the lines are small in a volume, with some reality thrown in!
If you stretched them out they might go around the car a couple or three times.
It's the liquid going around, a whole lot, very quickly, that does the cooling.

If it were me, I would ignore it, as you have lots of work ahead to get rid of everything involved that will be sticking out here and there, at the radiator and the firewall.
But then again, if you can find some capping off or plug fittings, it would look neater and more professionally done?

Just my opinion, that are like navels, everyone has one but can go just as unnoticed!
(:-)-I o <


Phil