Motor Oil and Gas
One gallon of used oil can contaminate a million gallons of fresh water. Americans generate nearly 1.3 billion gallons of waste oil each year, but less 800 million gallons are recycled. Used motor oil, antifreeze and gasoline contain heavy metals such as lead and cadmium. Lots of automotive products contain hazardous materials so they should be recycled when possible and always disposed with caution.
Never let automotive products run off the street into the storm drains where they can hurt aquatic life by killing organisms fish rely on for food. Automotive products are very difficult to remove at wastewater treatment plants making it doubly important to keep them away from water sources.
Gasoline contains more than 200 different chemicals. One of those chemicals, benzene, is a known carcinogen. Old gasoline might contain MTBE which was banned in California due to its ability to persist in water for decades.
Pour used oil into clean, sealable containers (like a plastic milk jug) and bring it with the oil filter to Western Placer Waste Management Authority or to Recology for recycling. Check this page for other certified drop-off locations. Many auto parts stores and service centers will also accept used motor oil provided it is clean and in a proper container. Don't mix your used oil with other wastes like gasoline, antifreeze or paint. This will contaminate the oil, rendering it non-recyclable.
Gasoline and other fuel additives must be treated as hazardous waste and disposed of at the Western Placer Waste Management Authority.