40 CFR 425.45 - Pretreatment standards for existing sources (PSES).

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§ 425.45 Pretreatment standards for existing sources (PSES).

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 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)

1 Within the range 6.0 to 10.0.

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