Same thing happened to me years ago. Pep Boys and several boat service businesses told me they could remove the gas but I'd have to take containers to an approved disposal location and pay $1,200 for them to take it. After many phone calls I found a boat repair shop that removed the gas, cleaned the tank, and disposed of...all for $150. Solution is to get on the phone and call lots of businesses in your area. BTW I'm in Okla and Jimmy Houston's Marine Service was my solution. Good luck.