Except as provided in Sec. 425.04 and 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: ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
Milligrams per liter (mg/
l)
---------------------------Sulfide..................................... 24 ............Total chromium.............................. 12 8pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Not less than 7.0. [47 FR 52870, Nov. 23, 1982, as amended at 61 FR 35685, July 8, 1996]