Shoot them with Grancrete and make affordable housing or ballistic panels out of them.
This product was specifically designed to encapsulate this caliber of waste, including heavy metals and radionuclides. Can't be much worse than gypsum or plaster, but then that's not considered hazardous waste. Or is it?
Will local regulations permit destruction by incineration?
What advice can the supplier of the replacement membranes give?
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