40 CFR 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)|
|pH||( 1)||( 1)|
1 Within the range 6.0 to 10.0.