40 CFR 420.25 – Pretreatment standards for existing sources (PSES)
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for existing sources (PSES):
(a) Sintering operations with wet air pollution control system. The following table presents PSES for sintering operations with wet air pollution control systems:
Subpart B—Pretreatment Standards for Existing Sources (PSES)
| Regulated parameter | Maximum daily 1 | Maximum monthly avg. 1 |
|---|---|---|
| Ammonia-N 2 3 | 0.0150 | 0.00501 |
| Cyanide 2 | 0.00300 | 0.00150 |
| Phenols (4AAP) 2 | 0.000100 | 0.0000501 |
| Lead | 0.000451 | 0.000150 |
| Zinc | 0.000676 | 0.000225 |
| 2,3,7,8-TCDF |
1 Pounds per thousand lb of product.
2 The pretreatment standards for these parameters apply only when sintering wastewater is co-treated with ironmaking wastewater.
3 The pretreatment standards for ammonia are not applicable to sources that discharge to a POTW with nitrification capability (defined at § 420.02(s)).
(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to POTWs.