[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR467.23] [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. 467.23 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The discharge of process wastewater pollutants from the core shall not exceed the values set forth below: Subpart B Core ------------------------------------------------------------------------ BAT effluent limitations --------------------------- 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........................................ 0.19 0.079 Aluminum.................................... 0.84 0.42 ------------------------------------------------------------------------ Subpart B Direct Chill Casting Contact Cooling Water ------------------------------------------------------------------------ BAT effluent limitations --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum cast --------------- Chromium.................................... 0.59 0.24 Cyanide..................................... 0.39 0.16 Zinc........................................ 1.94 0.81 Aluminum.................................... 8.55 4.26 ------------------------------------------------------------------------ [[Page 628]] Subpart B Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------ BAT Effluent Limitations --------------------------- 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 Aluminum.................................... 13.10 6.52 ------------------------------------------------------------------------ Subpart B Cleaning or Etching Bath ------------------------------------------------------------------------ BAT effluent limitations --------------------------- 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........................................ 0.26 0.109 Aluminum.................................... 1.15 0.573 ------------------------------------------------------------------------ Subpart B Cleaning or Etching Rinse ------------------------------------------------------------------------ BAT effluent limitations --------------------------- 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 Aluminum.................................... 8.95 4.45 ------------------------------------------------------------------------ Subpart B Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------ BAT effluent limitations --------------------------- 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........................................ 2.82 1.18 Aluminum.................................... 12.43 6.19 ------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11631 and 11633, Mar. 27, 1984]