Solvent waste has a high risk potental.
Therefore you will find here general hints only. It is on your own risk what to do in a specific situation.
Be careful! Do not put the disposal concept of the institute at risk!
If there is anything which could react you should want that it reacts IMMEDIATELY.
You did never ever want this to happen! In particular it's the fault of the others! But the situation needs an quick apropriate action!