250 R.I. Code R. 250-RICR-120-05-20.14
The provisions of this regulation, except for § 20.13(C) of this Part, insofar as they relate to air pollution, shall not apply to any person who blends alternative fuels with their primary fossil fuel where the maximum amount of alternative fuel as a percent by volume of the primary fossil fuel is less than or equal to one. This exemption shall not apply to alternative fuels containing greater than fifty (50) ppm PCBs nor does it exempt any person from compliance with the Department's Rules and Regulations for Hazardous Waste Management, Part 140-10-1 of this Title. Exemptions under this section will be considered after a written request to the Department from the applicant that explains the nature of the alternative fuel that is requested to be burned.
250 R.I. Code R. 250-RICR-120-05-20.14