StacksVerified U.S. regulatory reference

40 CFR Part 63, Table 2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
For the following new sources . . .You must meet the emissions limits for the specified pollutant . . .
Total fluoridesTotal particulate | Mercury
Wet-Process Phosphoric Acid Line0.0135 lb/ton of equivalent P2 O5 feed | |
Superphosphoric Acid Process Line c0.00870 lb/ton of equivalent P2 O5 feed | |
Phosphate Rock Dryer| 0.060 lb/ton of phosphate rock feed |
Phosphate Rock Calciner9.0E-04 lb/ton of rock feed | 0.092 g/dscm | 0.014 mg/dscm corrected to 3 percent oxygen

a The new source compliance dates are based on date of construction or reconstruction as specified in § 63.602(a).

b During periods of startup and shutdown, for emission limits stated in terms of pounds of pollutant per ton of feed, you are subject to the work practice standards specified in § 63.602(f).

c Beginning on August 19, 2018, you must include oxidation reactors in superphosphoric acid process lines when determining compliance with the total fluorides limit.

[80 FR 50436, Aug. 19, 2015, as amended at 82 FR 45199, Sept. 28, 2017]