1: Cut it longitudinally and chip it. It's easier to cut parallel to the grain than perpendicular, but your saw can get clogged if you're not careful.
2: Take it to either a "recycling center" (a guy with a tub grinder) or a used up quarry. Ask around. Call your local competition, ask them if they have any leads for you. If you don't let on that you're competing, they might give you some good info. Or they might even if you do.
3: Depending on local ordinances, you might be able to take it back to your shop, pile it up, and set the crap on fire. Party time! You supply the hot dogs, your guys bring the marshmallows. Six packs optional.