The private markets are great, but cannot be trusted to clean up after their own mess - they have proven this time and time and time again. The taxpayers will ultimately be on the hook for this payout, and that's simply unacceptable.
If the public has to bail out this company, at the very least, the board and C-Suite need to be liquidated and be fined substantially for this sort of behavior. They've known about the danger of these chemicals for almost 60 years, and not once did they (AFAIK) go to the government and actively ask for help to replace said chemicals with safer alternatives that don't literally last forever if consumed.