Waste transfer and recycling facilities handle residential and commercial solid waste residues that could be hazardous. Hazardous waste generated at a household can be disposed of in a municipal landfill and therefore could be common at waste transfer facilities if alternative disposal options are not available or used. Waste from conditionally exempt small quantity generators (businesses generating less than 220 pounds of hazardous waste each month) can also be disposed of in a municipal or nonmunicipal landfill through a conditional exemption in the hazardous waste regulations. Many hazardous wastes—such as electronic wastes, mercury-containing products, batteries, and used oil—can be recycled and are handled at recycling facilities. If improper storage or handling practices are used, ground water or surface water could be impacted.