View all text of Subpart I [§ 425.90 - § 425.96]
§ 425.95 - Pretreatment standards for existing sources (PSES).
(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:
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) |
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1 Within 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.