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 (BAT):
(a) Rolling spent neat oils--subpart H--BAT. There shall be no discharge of process wastewater pollutants.
(b) Rolling spent emulsions.
Subpart H--BAT------------------------------------------------------------------------
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..................................... 0.0005 0.0002Copper....................................... 0.002 0.0009Cyanide...................................... 0.0003 0.0001Zinc......................................... 0.002 0.0006------------------------------------------------------------------------
(c) Rolling contact cooling water.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.020 0.009Copper........................................ 0.069 0.033Cyanide....................................... 0.011 0.004Zinc.......................................... 0.055 0.023------------------------------------------------------------------------
(d) Drawing spent emulsions.
Subpart H--BAT------------------------------------------------------------------------
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..................................... 0.002 0.0009Copper....................................... 0.008 0.004Cyanide...................................... 0.001 0.0005Zinc......................................... 0.006 0.003------------------------------------------------------------------------
(e) Direct chill casting contact cooling water.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.019 0.008Copper........................................ 0.065 0.031Cyanide....................................... 0.010 0.004Zinc.......................................... 0.052 0.021------------------------------------------------------------------------
(f) Stationary casting contact cooling water--subpart H--BAT. There shall be no discharge of process wastewater pollutants.
(g) Heat treatment contact cooling water.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.029 0.012Copper........................................ 0.098 0.047Cyanide....................................... 0.016 0.006Zinc.......................................... 0.078 0.032------------------------------------------------------------------------
(h) Surface treatment spent baths.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.033 0.014Copper........................................ 0.114 0.054Cyanide....................................... 0.018 0.007Zinc.......................................... 0.091 0.038------------------------------------------------------------------------
(i) Surface treatment rinse.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.133 0.054Copper........................................ 0.457 0.219Cyanide....................................... 0.072 0.029Zinc.......................................... 0.365 0.151------------------------------------------------------------------------
(j) Alkaline cleaning spent baths.
Subpart H--BAT------------------------------------------------------------------------
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 0.0006Copper...................................... 0.005 0.002Cyanide..................................... 0.0007 0.0003Zinc........................................ 0.004 0.002------------------------------------------------------------------------
(k) Alkaline cleaning rinse.
Subpart H--BAT------------------------------------------------------------------------
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.................................... 0.626 0.254Copper...................................... 2.17 1.03Cyanide..................................... 0.338 0.135Zinc........................................ 1.73 0.710------------------------------------------------------------------------
(l) Sawing or grinding spent emulsions.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.009 0.004Copper........................................ 0.031 0.015Cyanide....................................... 0.005 0.002Zinc.......................................... 0.025 0.010------------------------------------------------------------------------
(m) Electrocoating rinse.
Subpart H--BAT------------------------------------------------------------------------
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...................................... 0.085 0.035Copper........................................ 0.293 0.140Cyanide....................................... 0.046 0.019Zinc.......................................... 0.234 0.096------------------------------------------------------------------------
(n) Degreasing spent solvents--subpart H--BAT. There shall be no discharge or process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2888, Jan. 22, 1986]