Gasoline is a mixture of about 150 chemicals refined from crude oil. It's usually a colorless, light brown or pink liquid.
Gasoline is used in cars, boats, motorcycles, lawn mowers and other engines.
Gasoline evaporates quickly when exposed to air. Most gasoline spilled in lakes, streams or soil evaporates. Some spilled gasoline can seep into groundwater and remain unchanged for years. Private wells located near a spill or a buried leaking tank may become contaminated. Exposure occurs when people breathe gasoline vapors while filling gas tanks.