40 CFR Part 63, Table 1
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| For the following existing sources . . . | You must meet the emission limits for the specified pollutant . . . |
|---|---|
| Total fluorides | Total particulate | Mercury |
| Wet-Process Phosphoric Acid Line | 0.020 lb/ton of equivalent P2 O5 feed | | |
| Superphosphoric Acid Process Line c | 0.010 lb/ton of equivalent P2 O5 feed | | |
| Superphosphoric Acid Process Line with a Submerged Combustion Process | 0.20 lb/ton of equivalent P2 O5 feed | | |
| Phosphate Rock Dryer | | 0.2150 lb/ton of phosphate rock feed | |
| Phosphate Rock Calciner | 9.0E-04 lb/ton of rock feed d | 0.181 g/dscm | 0.23 mg/dscm corrected to 3-percent oxygen e |
a The existing source compliance data is June 10, 2002, except as noted.
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.
d Compliance date is August 19, 2015.
e Compliance date November 3, 2020.
[85 FR 69512, Nov. 3, 2020]