Disposing of old gasoline?

What's the best way to dispose of old gas? My Barracuda has been on jackstands nearly 2 years and I'm getting close to getting it back on the road. When I put it on jackstands I only figured it would a month or 2. Lack of motiviation and other factors kept me from working on it.

Anyway, there's probably a 1/4 tank of old fuel in the tank and I don't know what to do with it. When I used to work at an automotive shop, I could just dump it in the 55 gallon drum of used oil and it would get diluted, but i don't work in that field anymore. Ideas? I'm about ready to get it back on the road.