15A NCAC 02D .0534      FLUORIDE EMISSIONS FROM PHOSPHATE FERTILIZER INDUSTRY

(a)  Emissions of total fluorides shall not exceed:

(1)           0.020 pounds per ton of phosphorus‑bearing material fed to any wet‑process phosphoric acid plant;

(2)           0.010 pounds per ton of phosphorus‑bearing material fed to any superphosphoric acid plant;

(3)           0.40 pounds per ton of phosphorus‑bearing material fed to any granular diammonium phosphate plant;

(4)           0.20 pounds per ton of phosphorus‑bearing material fed to any run‑of‑pile triple superphosphate plant including curing and storing process;

(5)           0.20 pounds per ton of phosphorus‑bearing material fed to any granular triple superphosphate plant that began operating after December 31, 1969;

(6)           0.40 pounds per ton of phosphorus‑bearing material fed to any granular triple superphosphate plant that began operating before January 1, 1970; and

(7)           0.00050 pounds per hour per ton of phosphorus‑bearing material cured or stored at any curing or storage facility associated with a granular triple superphosphate plant.

(b)  The phosphorus‑bearing material mentioned in Paragraph (a) of this Rule shall be expressed as phosphorus pentoxide.

History Note:        Authority G.S. 143‑215.3(a)(1); 143‑215.107(a)(5);

Eff. November 1, 1982;

Readopted Eff. November 1, 2020.