R.I. Gen. Laws § 23-19.1-34

No driver shall operate a vehicle hauling hazardous waste as defined in this chapter, unless the driver possesses a valid license of the appropriate class and a hazardous waste driver’s certificate issued by the department of environmental management. Applicants for the certificate shall present evidence to the department of environmental management that they have successfully completed the hazardous waste material hauler driver training course developed by the department of environmental management and conducted by the employer, holder of the transporter’s permit pursuant to § 23-19.1-10. The course shall specifically include training in transfer, handling, and spillage of hazardous waste materials, before a certificate may be issued. Certificates shall be issued only to applicants qualified by examinations prescribed and conducted by the employer or holders of the transporter’s permits. The employer or holder of the transporter’s permit shall certify to the director of the department of environmental management that the driver/applicant has successfully completed the course and test.