Disposing of old 2 cyle mixed gasoline

I have about 1 gallon of old (1 yr) gasoline that is mixed with 2 cycle oil... I have no more items that use this fuel.. How or where do I dispose of it legally? None of my neighbors have 2 stroke engines so no one to give it to..I live in the city so can't burn it, I won't pour it on ground, local hazmat facility won't take it, and fire dept has no clue.. How have you SAFELY disposed of old gasoline?