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§ 421.116 Pretreatment standards for new sources.
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary columbium-tantalum process wastewater introduced into a POTW shall not exceed the following values:
(a) Subpart K—Concentrate Digestion Wet Air Pollution Control.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | .174 | .081 |
| Zinc | .635 | .261 |
| Ammonia (as N) | 82.910 | 36.450 |
| Fluoride | 21.770 | 12.440 |
(b) Subpart K—Solvent Extraction Raffinate.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | 2.592 | 1.203 |
| Zinc | 9.442 | 3.888 |
| Ammonia (as N) | 1,233.000 | 542.5000 |
| Fluoride | 324.000 | 185.100 |