420.35—Pretreatment standards for existing sources (PSES).
Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.
| Pollutant or pollutant property | Pretreatment standards for existing sources | |
|---|---|---|
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| Kg/kkg (pounds per 1,000 lb) of products | ||
| Ammonia-N 1 | 0.00876 | 0.00292 |
| Cyanide | 0.00175 | 0.000876 |
| Phenols (4AAP) | 0.0000584 | 0.0000292 |
| Lead | 0.000263 | 0.0000876 |
| Zinc | 0.000394 | 0.000131 |
| 1 The pretreatment standards for ammonia are not applicable to sources that discharge to a POTW with nitrification capability (defined at 420.02(s)). | ||
| Pollutant or pollutant property | Pretreatment standards for existing sources | |
|---|---|---|
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| Kg/kkg (pounds per 1,000 lb) of product | ||
| Ammonia-N | 0.0350 | 0.0175 |
| Cyanide | 0.00175 | 0.000876 |
| Phenols (4AAP) | 0.000175 | 0.0000584 |
| Lead | 0.000263 | 0.0000876 |
| Zinc | 0.000394 | 0.000131 |
[47 FR 23284, May 27, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64266, Oct. 17, 2002]