not much help for the OP, but for the OC folks watching;
Household Hazardous Waste
good idea for city dwellers that don't have a lot of other options.. the place in the OC will also take it in any suitable sealed container like paint buckets etc. so you don't have to give up your gas cans..
I was raised on a farm in the midwest, old gas had a 101 uses but 'round these city folk, gotta be careful..
good luck!