Stingray, nice machine!
When I lived in NC, they had a yearly Punkin' Chunkin' contest 8-10 lb punkin nothing more than human power and leverage could be used in the chunkin'.
Somebody bought a Navy artillery tube and rigged up a piston, old bike, and gearing to pressurize the firing chamber. When they found the camera taped inside the Punkin over 400 yards away, it made for interesting footage!
Shmokes, in your Yellow/White Pages there should be a landfill or waste management-type place listed that should have a hotline/answerline for how to deal with 'em. If you've got a Batteries Plus (or similar place, all they sell is batteries) I've dropped stuff off with them and they deal with it, no charge.