[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR471.81] [Page 774-776] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 471--NONFERROUS METALS FORMING AND METAL POWDERS POINT SOURCE CATEGORY--Table of Contents Subpart H--Zinc Forming Subcategory Sec. 471.81 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). 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 process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): (a) Rolling spent neat oils--Subpart H--BPT. There shall be no discharge of process wastewater pollutants. (b) Rolling spent emulsions. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc rolled with emulsions --------------- Chromium.................................... 0.0006 0.0003 Copper...................................... 0.003 0.002 Cyanide..................................... 0.0004 0.0002 Zinc........................................ 0.002 0.0009 Oil and grease.............................. 0.028 0.017 TSS......................................... 0.057 0.027 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. [[Page 775]] (c) Rolling contact cooling water. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc rolled with contact cooling water --------------- Chromium.................................... 0.236 0.0097 Copper...................................... 1.02 0.536 Cyanide..................................... 0.156 0.065 Zinc........................................ 0.783 0.327 Oil and grease.............................. 10.7 6.43 TSS......................................... 22.0 10.5 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (d) Drawing spent emulsions. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc drawn with emulsions --------------- Chromium.................................... 0.003 0.001 Copper...................................... 0.011 0.006 Cyanide..................................... 0.002 0.0007 Zinc........................................ 0.009 0.004 Oil and grease.............................. 0.116 0.070 TSS......................................... 0.238 0.113 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (e) Direct chill casting contact cooling water. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc cast by the direct chill method --------------- Chromium.................................... 0.222 0.091 Copper...................................... 0.960 0.505 Cyanide..................................... 0.147 0.061 Zinc........................................ 0.738 0.308 Oil and grease.............................. 10.1 6.06 TSS......................................... 20.7 9.85 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (f) Stationary casting contact cooling water--Subpart H--BPT. There shall be no discharge of process wastewater pollutants. (g) Heat treatment contact cooling water. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc heat treated --------------- Chromium.................................... 0.336 0.138 Copper...................................... 1.45 0.763 Cyanide..................................... 0.221 0.092 Zinc........................................ 1.12 0.466 Oil and grease.............................. 15.3 9.16 TSS......................................... 31.3 14.9 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (h) Surface treatment spent baths. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc surface treated --------------- Chromium.................................... 0.039 0.016 Copper...................................... 0.169 0.089 Cyanide..................................... 0.026 0.011 Zinc........................................ 0.130 0.054 Oil and grease.............................. 1.78 1.07 TSS......................................... 3.64 1.73 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (i) Surface treatment rinse. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc surface treated --------------- Chromium.................................... 1.58 0.645 Copper...................................... 6.80 3.58 Cyanide..................................... 1.04 0.430 Zinc........................................ 5.23 2.19 Oil and grease.............................. 71.6 43.0 TSS......................................... 147 69.8 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (j) Alkaline cleaning spent baths. [[Page 776]] Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned --------------- Chromium.................................... 0.002 0.0007 Copper...................................... 0.007 0.004 Cyanide..................................... 0.001 0.0004 Zinc........................................ 0.005 0.002 Oil and grease.............................. 0.071 0.043 TSS......................................... 0.146 0.069 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (k) Alkaline cleaning rinse. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned --------------- Chromium.................................... 0.744 0.304 Copper...................................... 3.21 1.69 Cyanide..................................... 0.490 0.203 Zinc........................................ 2.47 1.03 Oil and grease.............................. 33.8 20.3 TSS......................................... 69.3 33.0 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (l) Sawing or grinding spent emulsions. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc sawed or ground with emulsions --------------- Chromium.................................... 0.011 0.005 Copper...................................... 0.045 0.024 Cyanide..................................... 0.007 0.003 Zinc........................................ 0.035 0.015 Oil and grease.............................. 0.476 0.286 TSS......................................... 0.976 0.464 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (m) Electrocoating rinse. Subpart H--BPT ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day average ------------------------------------------------------------------------ mg/off-kg (pounds per million off-pounds) of zinc electrocoated --------------- Chromium.................................... 1.01 0.412 Copper...................................... 4.35 2.29 Cyanide..................................... 0.664 0.275 Zinc........................................ 3.35 1.40 Oil and grease.............................. 45.8 27.5 TSS......................................... 93.9 44.7 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.5 to 10.0 at all times. (n) Degreasing spent solvents--Subpart H--BPT. There shall be no discharge of process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2888, Jan. 22, 1986]