[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR467.12] [Page 620-621] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 467--ALUMINUM FORMING POINT SOURCE CATEGORY--Table of Contents Subpart A--Rolling With Neat Oils Subcategory Sec. 467.12 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 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 for the core operation and for the ancillary operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available: Subpart A Core With an Annealing Furnace Scrubber ------------------------------------------------------------------------ BPT 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 neat oils --------------- Chromium.................................... 0.0360 0.0147 Cyanide..................................... 0.0237 0.0098 Zinc........................................ 0.119 0.0498 Aluminum.................................... 0.525 0.257 Oil and grease.............................. 1.634 0.980 Suspended solids............................ 3.348 1.593 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. Subpart A Core Without an Annealing Furnace Scrubber ------------------------------------------------------------------------ BPT 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 neat oils ---------------------------------------------=============== nCyanide.................................... 0.0161 0.0067 Zinc........................................ 0.0808 0.0338 Aluminum.................................... 0.356 0.174 Oil and grease.............................. 1.11 0.664 Suspended solids............................ 2.27 1.079 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. Subpart A Continuous Sheet Casting Spent Lubricant ------------------------------------------------------------------------ BPT effluent limitations --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum sheet cast by continuous methods --------------- Chromium.................................... 0.00086 0.00035 Cyanide..................................... 0.00057 0.00024 Zinc........................................ 0.0029 0.0012 Aluminum.................................... 0.0127 0.0063 Oil and grease.............................. 0.0393 0.0236 Suspended solids............................ 0.0805 0.0383 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. [[Page 621]] Subpart A Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------ BPT 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.................................... 3.39 1.39 Cyanide..................................... 2.24 0.93 Zinc........................................ 11.25 4.70 Aluminum.................................... 49.55 24.66 Oil and grease.............................. 154.10 92.46 Suspended solids............................ 315.91 150.25 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. Subpart A Cleaning or Etching Bath ------------------------------------------------------------------------ BPT 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 0.110 Aluminum.................................... 1.15 0.573 Oil and grease.............................. 3.58 2.15 Suspended solids............................ 7.34 3.49 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. Subpart A Cleaning or Etching Rinse ------------------------------------------------------------------------ BPT 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.................................... 6.12 2.51 Cyanide..................................... 4.04 1.67 Zinc........................................ 20.31 8.49 Aluminum.................................... 89.46 44.52 Oil and grease.............................. 278.24 166.95 Suspended solids............................ 570.39 271.29 pH.......................................... (1 ) (1 ) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. Subpart A Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------ BPT 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.................................... 7.00 2.86 Cyanide..................................... 4.61 1.91 Zinc........................................ 23.22 9.70 Aluminum.................................... 102.24 50.88 Oil and grease.............................. 318.00 190.80 Suspended solids............................ 651.90 310.05 pH.......................................... (1 ) (1 ) ------------------------------------------------------------------------ 1 Within the range of 7.0 to 10 at all times. [48 FR 49149, Oct. 24, 1983; 49 FR 11631 and 11632, Mar. 27, 1984]