CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 415—INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY > SUBPART F—Chlor-alkali Subcategory (Chlorine and Sodium or Potassium Hydroxide Production) (§415.60 to §415.67) > 415.64—Pretreatment standards for existing sources (PSES).

415.64—Pretreatment standards for existing sources (PSES).

(a) [Reserved]
(b) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart and using the diaphragm cell process, 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 F—Chlor-Alkali-Diaphragm Cells
Pollutant or pollutant property PSES effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Milligrams per liter (mq/1)
Copper (T) 2.1 0.80
Lead (T) 2.9 1.1
Nickel (T) 1.6 0.64

Code of Federal Regulations

In cases when POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations for Copper (T), Lead(T) and Nickel (T) are the same as specified in § 415.62(b) .