This is a test of commonsense. Complete the next sentence:

How to dispose of gasoline
Contact your local recycling authority.
Some recycling centers will accept gas and recondition it or recycle it safely. Your city's government officials should be able to direct you to the right recycling place.
Then, call the recycling location in advance to see if they have any particular instructions that you'll need to follow. Take it to a hazardous waste disposal center.