40 CFR § 425.95
Pretreatment standards for existing sources (PSES)
June 9, 2020
(a) Except as provided in 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 must achieve the following pretreatment standards:
Open Table
| Pollutant or pollutant property | PSES | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| Milligrams per liter (mg/l) | ||
| Total Chromium | 19 | 12 |
| pH | (1) | (1) |
1Within the range 6.0 to 10.0.
(b) Any existing source subject to this subpart which processes less than 3,600 splits/day shall comply with §425.95(a), except that the total chromium limitations contained in §425.95(a) do not apply.
[47 FR 52870, Nov. 23, 1982; 48 FR 30117, June 30, 1983, as amended at 53 FR 9183, Mar. 21, 1988]
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