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 G
[PSES Effluent Limitations]------------------------------------------------------------------------
Maximum
for any 1
Pollutant or pollutant property day (mg/
l)------------------------------------------------------------------------Oil and grease............................................... 100Copper....................................................... 5Chromium..................................................... 4Arsenic...................................................... 4------------------------------------------------------------------------ In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as guidance.
[Grams per cubic meter of production]------------------------------------------------------------------------
Maximum for any
Pollutant or pollutant property 1 day------------------------------------------------------------------------Oil and grease......................................... 20.5Copper................................................. .62Chromium............................................... .41Arsenic................................................ .41------------------------------------------------------------------------