Parts Washer cleaner

Just mixed some solvent up from stuff i had sitting around, 2 gallons of b-12 chemtool, 2.5 gallons of parts solvent, 1 can aircraft stripper, 5 gallons of diesel lol i used a 30 gallon plastic tub and needed to soak a pair of heads and some other little stuff. Sounds like a lot but just barelt covered the tops of the rockers
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What are you going to do with it when it's spent. With that many different chemicals, it would have to be handled as hazerdous waste and cost a small fortune to get rid of.