Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System
Chapter NR 276 - Phosphate Manufacturing
Section NR 276.10 - Effluent limitations, best practicable treatment
Current through August 26, 2024
The following effluent limitations for all or specific subcategories establish, except as provided in s. NR 276.06 and subch. IV of ch. NR 220, the quantity or quality of pollutants or pollutant properties which may be discharged to surface waters by a facility subject to the provisions of this chapter after application to process wastes of the best practicable control technology currently available.
(1) There shall be no discharge resulting from the manufacture of sodium tripolyphosphate or animal feed grade calcium phosphate in the phosphate subcategory.
(2) There shall be no discharge resulting from manufacture in subcategories (4) and (5) except in accordance with s. NR 276.07(1) and (3).
(3) The pH of all discharges shall be within the range of 6.0 to 9.0.
(4) For discharges from subcategories (1), (2) and (6) and human food grade calcium phosphate in subcategory (3), the 30-day average limitations for suspended solids and other parameters are set forth in table 1 in lbs/1000 lbs. or kg/1000 kg, of product. Daily maximum limitations are twice the 30-day average limitations, except for elemental phosphorus.
TABLE 1
BPT EFFLUENT LIMIT ATIONS
| Subcategory* | Susp. Solids | Total Phosphorus | Fluoride | Arsenic | Elemental Phosphorus |
| (1) | 0.5 | 0.15 | 0.05 | No detectable quantity | |
| (2) | 0.7 | 0.8 | .00005 | No detectable quantity | |
| (3)** | 0.06 | 0.03 | |||
| (6) | 0.25 | 0.40 | 0.15 |
