EPA does NOT require technicians (or the company employing the technician) to keep which of the following records when disposing of appliances with 5-50 pounds of refrigerant?

A. Records of refrigerant purchase history.
B. Records of refrigerant reclamation.
C. Records of appliance disposal.
D. Records of technician certification.

The EPA requires records of appliance disposal, refrigerant reclamation, and technician certification when disposing of appliances with 5-50 pounds of refrigerant, but it does not require records of refrigerant purchase history.

Explanation:

The Environmental Protection Agency (EPA) does have requirements for technicians and companies concerning the handling and disposal of refrigerants. When disposing of appliances containing 5-50 pounds of refrigerant, technicians and the companies employing them are mandated to keep specific records. These records should include documentation of appliance disposal, refrigerant reclamation, and technician certification. However, they are not explicitly required to keep a record of refrigerant purchase history related to these activities. It is essential for environmental safety that equipment is not only appropriately designed but also well maintained as per EPA regulations. Documentation is crucial in ensuring environmental regulations are followed, and failure to adhere to these can result in significant penalties.