The federal hazardous waste law (the Resource Conservation and Recovery Act, or “RCRA”) allows states to enact their own hazardous waste laws, which must be at least as stringent as the federal laws. The requirements under California law are more stringent than the federal criteria. Wastes that pass the federal hazardous waste criteria but fail the California criteria are called “non-RCRA” or “California-only” hazardous wastes. Wastes containing corrosive solids, asbestos, nickel or zinc are examples of common California-only hazardous wastes. Other states may not consider California-only wastes hazardous. Federal law also exempts generators of small quantities of waste from many federal waste management requirements.