[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: 40CFR467.33] [Page 632-633] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 467_ALUMINUM FORMING POINT SOURCE CATEGORY--Table of Contents Subpart C_Extrusion Subcategory Sec. 467.33 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. (a) 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: (b) There shall be no discharge allowance for wastewater pollutants from the degassing operation. (c) The discharge of wastewater pollutants from the core and ancillary operation except those in (b) of this section, shall not exceed the values set forth below: Subpart C 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 extruded --------------------------- Chromium.................................... 0.15 0.061 Cyanide..................................... 0.098 0.041 Zinc........................................ 0.49 0.21 Aluminum.................................... 2.19 1.09 ------------------------------------------------------------------------ Subpart C Extrusion Press Leakage ------------------------------------------------------------------------ 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 extruded --------------------------- Chromium.................................... 0.65 0.27 Cyanide..................................... 0.43 0.18 Zinc........................................ 2.16 0.90 Aluminum.................................... 9.51 4.73 ------------------------------------------------------------------------ Subpart C 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 ------------------------------------------------------------------------ Subpart C Press 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 C 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 ------------------------------------------------------------------------ [[Page 633]] Subpart C 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........................................ 0.262 0.109 Aluminum.................................... 1.15 0.58 ------------------------------------------------------------------------ Subpart C 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...................................... 1.7 0.7 Cyanide....................................... 1.2 0.5 Zinc.......................................... 5.7 2.4 Aluminum...................................... 25 13 ------------------------------------------------------------------------ Subpart C 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, 11633, and 11634, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]