Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources (PSES):
Subpart AL--Ferric Chloride------------------------------------------------------------------------
PSES limitations
---------------------------
Average of
Pollutant or pollutant property daily values
Maximum for for 30
any 1 day consecutive
days------------------------------------------------------------------------
Milligrams per liter (mg/
l)
---------------Total Chromium.............................. 3.0 1.0Hexavalent Chromium......................... 0.25 0.09Copper (T).................................. 1.0 0.50Nickel (T).................................. 2.0 1.0Zinc (T).................................... 5.0 2.5------------------------------------------------------------------------ Sec. 415.385 [Reserved]