(a) Wet process phosphoric acid process line. On and after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain total fluorides in excess of 10.0 gram/metric ton of equivalent P2O5 feed (0.020 lb/ton).
(b) Superphosphoric acid process line--(1) Vacuum evaporation process. On and after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain total fluorides in excess of 5.0 gram/metric ton of equivalent P2O5 feed (0.010 lb/ton).
(1) Vacuum evaporation process. On and after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain total fluorides in excess of 5.0 gram/metric ton of equivalent P2O5 feed (0.010 lb/ton).
(2) Submerged combustion process. On and after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain total fluorides in excess of 100.0 gram/metric ton of equivalent P2O5 feed (0.20 lb/ton).
(c) Phosphate rock dryer. On or after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain particulate matter in excess of 0.10750 kilogram/metric ton of phosphate rock feed (0.2150 lb/ton).
(d) Phosphate rock calciner. On or after the date on which the performance test required to be conducted by Sec. Sec. 63.7 and 63.606 is required to be completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected source any gases which contain particulate matter in excess of 0.1810 gram per dry standard cubic meter (g/dscm) (0.080 grains per dry standard cubic foot (gr/dscf)).
(e) Evaporative cooling tower. No owner or operator shall introduce into any evaporative cooling tower any liquid effluent from any wet scrubbing device installed to control emissions from process equipment. Each owner or operator of an affected source subject to this paragraph (e) must certify to the Administrator annually that he/she has complied with the requirements contained in this section.
(f) Purified phosphoric acid process line. (1) Each owner or operator subject to the provisions of this subpart shall comply with the provisions of subpart H of this part.
(1) Each owner or operator subject to the provisions of this subpart shall comply with the provisions of subpart H of this part.
(2) For any existing purified phosphoric acid process line, any of the following shall constitute a violation of this subpart:
(i) A thirty day average of daily concentration measurements of methyl isobutyl ketone in excess of twenty parts per million for each product acid stream.
(ii) A thirty day average of daily concentration measurements of methyl isobutyl ketone in excess of thirty parts per million for each raffinate stream.
(iii) A daily average chiller stack exit gas stream temperature in excess of fifty degrees Fahrenheit. [57 FR 61992, Dec. 29, 1992, as amended at 67 FR 40579, June 12, 2002; 67 FR 40817, June 13, 2002]