§ 421.96 Pretreatment standards for new sources.
Current through Aug 22, 2025 · Read all of Part 421
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 metallurgical acid plant blowdown introduced into a POTW shall not exceed the following values:
Subpart I—Metallurgical Acid Plant—PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of 100 pct sulfuric acid capacity | ||
| Arsenic | 3.550 | 1.584 |
| Cadmium | 0.511 | 0.204 |
| Copper | 3.269 | 1.558 |
| Lead | 0.715 | 0.332 |
| Zinc | 2.605 | 1.073 |
| Fluoride 1 | 89.390 | 50.820 |
| Molybdenum 1 | [Reserved] | [Reserved]. |
1 For Molybdenum acid plants only.
[50 FR 38343, Sept. 20, 1985, as amended at 55 FR 31697, Aug. 3, 1990]