(a) Except as provided in Sec. 425.04 and 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 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.
(b) Any existing source subject to this subpart which processes less than 275 hides/day shall comply with Sec. 425.15(a), except that the total chromium limitations contained in Sec. 425.15(a) do not apply. [47 FR 52870, Nov. 23, 1982; 48 FR 30116, June 30, 1983, as amended at 53 FR 9182, Mar. 21, 1988; 61 FR 35685, July 8, 1996]