Final answer:
OPTION C.
Sanitary landfills are not a recommended method for the disposal of hazardous wastes due to the potential for environmental contamination, particularly in groundwater.
Step-by-step explanation:
The question asks about methods for disposal of hazardous wastes, indicating which one of the provided options is not a recognized method for disposing of such waste. The primary recognized methods for the disposal of hazardous waste include controlled incineration and deep-well injections, with these processes designed to minimize environmental impact. Sanitary landfills are designed for non-hazardous waste and can lead to problems such as groundwater contamination and are thus not suitable for hazardous waste. The waste exchange program involves exchanging wastes between companies where one's waste could be another's resource, thereby reducing the need for new raw materials and disposal; however, it's not a disposal method, but a form of recycling. Therefore, the correct answer to the question is 'sanitary landfills,' which are not generally used for hazardous waste disposal.