Why? granted there are some HAZMAT issues, but where is the requirement that it has to be professionals? And why couldn't they volunteer if they felt so inclined?
Because these days the government is involved, talk to them. I hate to rain on a parade but at one time we explored sinking a ship in Oregon. After two years, with no answers all those involved gave up. Can't talk about it, can't tell them what you can do, you have to ask, come up with big money and stay involved.