[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: 40CFR467.34] [Page 635-636] 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. 467.34 New source performance standards. Any new source subject to this subpart must achieve the following performance standards. (a) There shall be no discharge allowance for wastewater pollutants from the degassing operation. (b) The discharge of wastewater pollutants from the core and ancillary operations except those listed in paragraph (a) shall not exceed the values set forth below: Subpart C Core ------------------------------------------------------------------------ NSPS --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum extruded --------------- Chromium.................................... 0.13 0.051 Cyanide..................................... 0.068 0.027 Zinc........................................ 0.35 0.14 Aluminum.................................... 2.07 0.92 Oil and grease.............................. 3.39 3.39 Suspended solids............................ 5.10 4.07 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Extrusion Press Leakage ------------------------------------------------------------------------ NSPS --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum extruded --------------- Chromium.................................... 0.11 0.045 Cyanide..................................... 0.060 0.024 Zinc........................................ 0.31 0.126 Aluminum.................................... 1.82 0.81 Oil and grease.............................. 2.98 2.98 Suspended solids............................ 4.47 3.58 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Direct Chill Casting Contact Cooling Water ------------------------------------------------------------------------ NSPS ------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods -------------- Chromium...................................... 0.49 0.20 Cyanide....................................... 0.27 0.11 Zinc.......................................... 1.36 0.56 Aluminum...................................... 8.12 3.60 Oil and grease................................ 13.29 13.29 Suspended solids.............................. 19.94 15.95 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ The pH shall be maintained within the range of 7.0 to 10.0 at all times except for those situations when this waste stream is discharged separately and without commingling with any other wastewater in which case the pH shall be within the range of 6.0 to 10.0 at all times. [[Page 636]] Subpart C Press Heat Treatment Contact Cooling Water ------------------------------------------------------------------------ NSPS ------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off-lbs) of aluminum quenched -------------- Chromium...................................... 0.76 0.31 Cyanide....................................... 0.41 0.17 Zinc.......................................... 2.08 0.86 Aluminum...................................... 12.45 5.52 Oil and grease................................ 20.37 20.37 Suspended solids.............................. 30.56 24.45 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------ NSPS --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum quenched --------------- Chromium.................................... 0.76 0.31 Cyanide..................................... 0.41 0.17 Zinc........................................ 2.08 0.86 Aluminum.................................... 12.45 5.52 Oil and grease.............................. 20.37 20.37 Suspended solids............................ 30.56 24.45 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Cleaning or Etching Bath ------------------------------------------------------------------------ NSPS --------------------------- 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.................................... 0.067 0.027 Cyanide..................................... 0.036 0.015 Zinc........................................ 0.183 0.075 Aluminum.................................... 1.094 0.485 Oil and grease.............................. 1.79 1.79 Suspended solids............................ 2.69 2.15 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Cleaning or Etching Rinse ------------------------------------------------------------------------ NSPS ------------------------- 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...................................... 0.52 0.21 Cyanide....................................... 0.28 0.11 Zinc.......................................... 1.42 0.59 Aluminum...................................... 8.50 3.77 Oil and grease................................ 13.91 13.91 Suspended solids.............................. 20.87 16.70 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. Subpart C Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------ NSPS ------------------------- 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...................................... 0.72 0.29 Cyanide....................................... 0.39 0.16 Zinc.......................................... 1.97 0.81 Aluminum...................................... 11.81 5.24 Oil and grease................................ 19.33 19.33 Suspended solids.............................. 29.00 23.20 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. [48 FR 49149, Oct. 24, 1983; 49 FR 11633 and 11634, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]