[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: 40CFR467.44] [Page 639-640] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 467_ALUMINUM FORMING POINT SOURCE CATEGORY--Table of Contents Subpart D_Forging Subcategory Sec. 467.44 New source performance standards. Any new source subject to this subpart must achieve the following performance standards. The discharge of wastewater pollutants from the core shall not exceed the values set forth below: [[Page 640]] Subpart D Core ------------------------------------------------------------------------ NSPS --------------------------- Pollutant or pollutant property Maximum for Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (lb/million off- lbs) of aluminum forged --------------- Chromium.................................... 0.019 0.008 Cyanide..................................... 0.010 0.004 Zinc........................................ 0.051 0.021 Aluminum.................................... 0.305 0.135 Oil and grease.............................. 0.50 0.50 Suspended solids............................ 0.75 0.60 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10 at all times. Subpart D Forging 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 forged --------------- Chromium.................................... 0.035 0.014 Cyanide..................................... 0.019 0.008 Zinc........................................ 0.096 0.04 Aluminum.................................... 0.576 0.256 Oil and grease.............................. 0.943 0.95 Suspended solids............................ 1.42 1.13 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10 at all times. Subpart D 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 0.163 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 at all times. Subpart D 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.................................... 0.066 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 at all times. Subpart D 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...................................... 8.5 3.77 Oil and grease................................ 13.91 13.91 Suspended solids.............................. 20.87 16.69 pH............................................ (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10 at all times. Subpart D 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 0.155 Zinc......................................... 1.97 0.812 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 at all times. [48 FR 49149, Oct. 24, 1983; 49 FR 11633 and 11635, Mar. 27, 1984] [[Page 641]]