Current through September 30, 2024
Section 425.15 - Pretreatment standards for existing sources (PSES)(a) Except as provided in § 425.04 and 40 CFR 403.7 and 403.13 , any existing source subject to this subpart which 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.
(b) Any existing source subject to this subpart which processes less than 275 hides/day shall comply with § 425.15(a) , except that the total chromium limitations contained in § 425.15(a) do not apply.47 FR 52870, Nov. 23, 1982; 48 FR 30116, June 30, 1983, as amended at 53 FR 9182, Mar. 21, 1988; 61 FR 35685, July 8, 1996