Except as provided in § 425.04 and 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403, and achieve the following pretreatment standards:
| Pollutant or pollutant property
| PSES
|
|---|
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| | Milligrams per liter (mg/l)
|
| Sulfide | 24 | |
| Total chromium | 12 | 8
|
| pH | (
1) | (
1)
|