Disposing of old gasoline?

Thanks for the replies, guys. All of my other cars are injected and I've dealt with leaky injectors on my Z28 already, so I won't run it in any of my cars. I don't think the lawnmower deserves it, either. I checked with the local hazardous waste disposal and they take old gasoline. I just have to buy a cheap gas can to put it in, I guess.