Definitions.

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. (a) Wet-process phosphoric acid plant means any facility manufacturing phosphoric acid by reacting phosphate rock and acid. A wet-process phosphoric acid plant includes: Reactors, filters, evaporators, and hot wells. (b) Total fluorides means elemental fluorine and all fluoride compounds as measured by reference methods specified in § 60.204, or equivalent or alternative methods. (c) Equivalent P 2 O 5 feed means the quantity of phosphorus, expressed as phosphorus pentoxide, fed to the process. [40 FR 33154, Aug. 6, 1975, as amended at 65 FR 61757, Oct. 17, 2000; 80 FR 50433, Aug. 19, 2015]