Run-of-pile triple superphosphate
Run-of-pile triple superphosphate means any triple superphosphate that has not been processed in a granulator and is composed of particles at least 25 percent by weight of which (when not caked) will pass through a 16 mesh screen.
Source
40 CFR § 60.231
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part.