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) |
1 Not less than 7.0.
40 C.F.R. §425.25