Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable: (a) Sand drying wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 0.210 0.085 Cyanide (total) 0.114 0.045 Lead 0.159 0.074 Nickel 0.312 0.210 Ammonia (as N) 75.710 33.280 (b) Sand chlorination off-gas wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 16.080 6.521 Cyanide (total) 8.694 3.478 Lead 12.170 5.651 Nickel 23.910 16.080 Ammonia (as N) 5,795.000 2,547.000 (c) Sand chlorination area-vent wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 3.154 1.279 Cyanide (total) 1.705 0.682 Lead 2.387 1.108 Nickel 4.688 3.154 Ammonia (as N) 1,136.000 499.500 (d) SiCl 4 purification wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 2.774 1.125 Cyanide (total) 1.500 0.600 Lead 2.099 0.975 Nickel 4.124 2.774 Ammonia (as N) 999.500 439.400 (e) Feed makeup wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 2.103 0.852 Cyanide (total) 1.137 0.455 Lead 1.591 0.739 Nickel 3.126 2.103 Ammonia (as N) 757.500 333.000 (f) Iron extraction (MIBK) steam stripper bottoms. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 0.830 0.337 Cyanide (total) 0.449 0.180 Lead 0.628 0.292 Nickel 1.234 0.830 Ammonia (as N) 299.100 131.500 (g) Zirconium filtrate. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 14.350 5.819 Cyanide (total) 7.758 3.103 Lead 10.860 5.043 Nickel 21.330 14.350 Ammonia (as N) 5,171.000 2,273.00 (h) Hafnium filtrate. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 0.000 0.000 Cyanide (total) 0.000 0.000 Lead 0.000 0.000 Nickel 0.000 0.000 Ammonia (as N) 0.000 0.000 (i) Calcining caustic wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced Chromium (total) 3.329 1.350 Cyanide (total) 1.799 0.720 Lead 2.519 1.170 Nickel 4.948 3.329 Ammonia (as N) 1,199.000 527.200 (j) Pure chlorination wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium and hafnium produced Chromium (total) 14.180 5.748 Cyanide (total) 7.663 3.065 Lead 10.730 4.981 Nickel 21.070 14.180 Ammonia (as N) 5,108.000 2,245.000 (k) Reduction area-vent wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium and hafnium produced Chromium (total) 1.364 0.553 Cyanide (total) 0.737 0.295 Lead 1.032 0.479 Nickel 2.027 1.364 Ammonia (as N) 491.300 216.000 (l) Magnesium recovery off-gas wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium and hafnium produced Chromium (total) 7.671 3.110 Cyanide (total) 4.147 1.659 Lead 5.805 2.695 Nickel 11.400 7.671 Ammonia (as N) 2,764.000 1,215.000 (m) Magnesium recovery area-vent wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium and hafnium produced Chromium (total) 4.262 1.728 Cyanide (total) 2.304 0.921 Lead 3.225 1.497 Nickel 6.335 4.262 Ammonia (as N) 1,535.000 675.000 (n) Zirconium chip crushing wet air pollution control. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium and hafnium produced Chromium (total) 0.000 0.000 Cyanide (total) 0.000 0.000 Lead 0.000 0.000 Nickel 0.000 0.000 Ammonia (as N) 0.000 0.000 (o) Acid leachate from zirconium metal production. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of pure zirconium produced Chromium (total) 10.900 4.420 Cyanide (total) 5.893 2.357 Lead 8.250 3.831 Nickel 16.210 10.900 Ammonia (as N) 3,928.000 1,674.000 (p) Acid leachate from zirconium alloy production. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium contained in alloys produced Chromium (total) 5.835 2.366 Cyanide (total) 3.154 1.262 Lead 4.416 2.050 Nickel 8.674 5.835 Ammonia (as N) 2,102.000 895.000 (q) Leaching rinse water from zirconium metal production. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of pure zirconium produced Chromium (total) 21.810 8.840 Cyanide (total) 11.790 4.715 Lead 16.500 7.661 Nickel 32.410 21.810 Ammonia (as N) 7,856.000 3,453.000 (r) Leaching rinse water from zirconium alloy production. BAT Limitations for the Primary Zirconium and Hafnium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of zirconium contained in alloys produced Chromium (total) 0.292 0.118 Cyanide (total) 0.158 0.063 Lead 0.221 0.103 Nickel 0.434 0.292 Ammonia (as N) 105.200 46.240