[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR467.25] [Page 627-628] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 467_ALUMINUM FORMING POINT SOURCE CATEGORY--Table of Contents Subpart B_Rolling With Emulsions Subcategory Sec. 467.25 Pretreatment standards for existing sources. 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. The mass of wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the following values: Subpart B Core ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum rolled with emulsions --------------------------- Chromium.................................... 0.057 0.024 Cyanide..................................... 0.038 0.016 Zinc........................................ 0.190 0.079 TTO......................................... 0.090 ............ Oil and grease (alternate monitoring 6.8 3.4 parameter)................................. ------------------------------------------------------------------------ [[Page 628]] Subpart B Direct Chill Casting Contact Cooling Water ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum cast by semi-continuous methods --------------------------- Chromium.................................... 0.59 0.24 Cyanide..................................... 0.39 0.16 Zinc........................................ 1.94 0.81 TTO......................................... 0.92 ............ Oil and grease (alternate monitoring 69 35 parameter)................................. ------------------------------------------------------------------------ Subpart B Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum quenched --------------------------- Chromium.................................... 0.90 0.37 Cyanide..................................... 0.59 0.25 Zinc........................................ 2.98 1.25 TTO......................................... 1.41 ............ Oil and grease (alternate monitoring 110 53 parameter)................................. ------------------------------------------------------------------------ Subpart B Cleaning or Etching Bath ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum cleaned or etched --------------------------- Chromium.................................... 0.079 0.032 Cyanide..................................... 0.052 0.022 Zinc........................................ 0.262 0.109 TTO......................................... 0.124 ............ Oil and grease (alternate monitoring 9.3 4.7 parameter)................................. ------------------------------------------------------------------------ Subpart B Cleaning or Etching Rinse ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum cleaned or etched --------------------------- Chromium.................................... 0.61 0.25 Cyanide..................................... 0.41 0.17 Zinc........................................ 2.03 0.85 TTO......................................... 0.96 ............ Oil and grease (alternate monitoring 73 36 parameter)................................. ------------------------------------------------------------------------ Subpart B Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------ PSES --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum cleaned or etched --------------------------- Chromium.................................... 0.85 0.35 Cyanide..................................... 0.56 0.23 Zinc........................................ 2.83 1.18 TTO......................................... 1.34 ............ Oil and grease (alternate monitoring 100 50 parameter)................................. ------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, and 11633, Mar. 27, 1984, as amended at 53 FR 52369 and 52370, Dec. 27, 1988]