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 A--Aluminum Chloride------------------------------------------------------------------------
Pollutant or pollutant property PSES limitations------------------------------------------------------------------------pH..................................... Within the range 5.0 to 10.0.------------------------------------------------------------------------ Sec. 415.15 [Reserved]