§ 429.95 Pretreatment standards for existing sources (PSES).
Except as provided in 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 meet the following pretreatment standards for existing sources (PSES):
Subpart H
[PSES Effluent Limitations]
Pollutant or pollutant property
Maximum for any 1 day (mg/l)
Oil and grease
100
Copper
5
Chromium
4
Arsenic
4
In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as guidance.
Subpart H
[PSES Effluent Limitations; grams per cu m of production]