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]------------------------------------------------------------------------
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.
Subpart H
[PSES Effluent Limitations; grams per cu m of production]------------------------------------------------------------------------
Maximum
Pollutant or pollutant property for any 1
day------------------------------------------------------------------------Oil and grease............................................... 20.5Copper....................................................... .62Chromium..................................................... .41Arsenic...................................................... .41------------------------------------------------------------------------