An auto salvage yard is a business that dismantles automobiles for parts. Auto salvage yards may release hazardous materials into the environment, including petroleum-based products such as oils, lubricants, fuel, antifreeze, brake fluid, and steering fluid. Other hazardous materials commonly handled at salvage facilities include Freon or other refrigerants, mercury from switches, lead from lead/acid batteries and wheel weights, and asbestos from brakes. If hazardous materials are not properly managed or disposed of or good housekeeping practices are not in place, these materials can contaminate ground water or enter surface water through stormwater runoff.