Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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 practicable technology currently available: (a) Sand drying wet air pollution control. BPT 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) 0.250 0.102 Cyanide (total) 0.165 0.068 Lead 0.239 0.114 Nickel 1.091 0.721 Ammonia (as N) 75.710 33.280 Total suspended solids 23.290 11.080 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Sand chlorination off-gas wet air pollution control. BPT 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 zironium dioxide and hafnium dioxide produced Chromium (total) 19.130 7.825 Cyanide (total) 12.610 5.216 Lead 18.260 8.694 Nickel 83.460 55.210 Ammonia (as N) 5,795.000 2,547.000 Total suspended solids 1,782.000 847.700 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Sand chlorination area-vent wet air pollution control. BPT 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) 3.751 1.534 Cyanide (total) 2.472 1.023 Lead 3.580 1.705 Nickel 16.370 10.830 Ammonia (as N) 1,136.000 449.500 Total suspended solids 349.500 166.200 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) SiCl 4 purification wet air pollution control. BPT 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) 3.299 1.350 Cyanide (total) 2.174 0.900 Lead 3.149 1.500 Nickel 14.400 9.522 Ammonia (as N) 999.500 439.400 Total suspended solids 307.400 146.200 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Feed makeup wet air pollution control. BPT 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) 2.501 1.023 Cyanide (total) 1.648 0.682 Lead 2.387 1.137 Nickel 10.910 7.217 Ammonia (as N) 757.500 333.000 Total suspended solids 233.000 110.800 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Iron extraction (MIBK) steam stripper bottoms. BPT 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) 0.987 0.404 Cyanide (total) 0.651 0.269 Lead 0.942 0.449 Nickel 4.308 2.850 Ammonia (as N) 299.100 131.500 Total suspended solids 92.000 43.760 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (g) Zirconium filtrate. BPT 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) 17.070 6.982 Cyanide (total) 11.250 4.655 Lead 16.290 7.758 Nickel 74.480 49.260 Ammonia (as N) 5,171.000 2,273.000 Total suspended solids 1,590.000 756.400 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Hafnium filtrate. BPT 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 Total suspended solids 0.000 0.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Calcining caustic wet air pollution control. BPT 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) 3.959 1.619 Cyanide (total) 2.609 1.080 Lead 3.779 1.799 Nickel 17.270 11.430 Ammonia (as N) 1,199.000 527.200 Total suspended solids 368.900 175.400 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (j) Pure chlorination wet air pollution control. BPT 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) 16.860 6.897 Cyanide (total) 11.110 4.598 Lead 16.090 7.663 Nickel 73.570 48.660 Ammonia (as N) 5,108.000 2,245.000 Total suspended solids 1,571.000 747.200 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (k) Reduction area-vent wet air pollution control. BPT 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) 1.622 0.663 Cyanide (total) 1.069 0.442 Lead 1.548 0.737 Nickel 7.077 4.681 Ammonia (as N) 491.300 216.000 Total suspended solids 151.100 71.880 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (l) Magnesium recovery off-gas wet air pollution control. BPT 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) 9.123 3.732 Cyanide (total) 6.013 2.488 Lead 8.708 4.147 Nickel 39.810 26.330 Ammonia (as N) 2,764.000 1,215.000 Total suspended solids 850.100 404.300 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (m) Magnesium recovery area-vent wet air pollution control. BPT 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) 5.068 2.073 Cyanide (total) 3.340 1.382 Lead 4.838 2.304 Nickel 22.110 14.630 Ammonia (as N) 1,535.000 675.000 Total suspended solids 472.200 224.600 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0. . (n) Zirconium chip crushing wet air pollution control. BPT 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 Total suspended solids 0.000 0.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (o) Acid leachate from zirconium metal production. BPT 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) 12.970 5.304 Cyanide (total- 8.545 3.536 Lead 12.380 5.893 Nickel 56.570 37.420 Ammonia (as N) 3,928.000 1,727.000 Total suspended solids 1,208.000 574.600 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (p) Acid leachate from zirconium alloy production. BPT 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) 6.939 2.839 Cyanide (total) 4.574 1.893 Lead 6.624 3.154 Nickel 30.280 20.030 Ammonia (as N) 2,102.000 924.200 Total suspended solids 646.600 307.600 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (q) Leaching rinse water from zirconium metal production. BPT 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 produced Chromium (total) 25.930 10.610 Cyanide (total) 17.090 7.072 Lead 24.750 11.790 Nickel 113.200 74.840 Ammonia (as N) 7,856.000 3,453.000 Total suspended solids 2,416.000 1,149.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0. (r) Leaching rinse water from zirconium alloy production. BPT 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 in alloys produced Chromium (total) 0.347 0.142 Cyanide (total) 0.229 0.095 Lead 0.331 0.158 Nickel 1.515 1.002 Ammonia (as N) 105.200 46.240 Total suspended solids 32.350 15.390 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times.