R.I. Gen. Laws § 23-19.4-1: Licenses — Applications.

(a) No person, firm, corporation, partnership, or association shall engage in the business of pumping, cleaning, and/or transporting septage, industrial wastes, or oil waste unless a license is obtained from the department of environmental management.

(b) Any person, firm, corporation, partnership or association who desires to engage in such a business shall submit in writing in such form as is required by the department, an application for a license to engage therein.