Paper recycling residuals
Paper recycling residuals means the secondary material generated from the recycling of paper, paperboard and corrugated containers composed primarily of fibers that are too small or weak to be used to make new paper and paperboard products. Secondary material from paper recycling processes with a heating value below 6,300 Btu/lb on a dry basis due to excessive non-fiber material content (including polystyrene foam, polyethylene film, other plastics, waxes, adhesives, dyes and inks, clays, starches and other coating and filler material) are not paper recycling residuals for the purposes of this definition.
Source
40 CFR § 241.2
Scoping language
For the purposes of this subpart