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) Tungsten detergent wash and rinse. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten scrap washed Copper 0.371 0.195 Nickel 0.374 0.248 Ammonia (as N) 25.990 11.430 Cobalt 0.768 0.337 Tungsten 1.357 0.542 Oil and grease 3.900 2.340 Total suspended solids 7.995 3.803 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Tungsten leaching acid. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten produced Copper 4.885 2.571 Nickel 4.937 3.265 Ammonia (as N) 342.700 150.700 Cobalt 10.130 4.448 Tungsten 17.890 7.147 Oil and grease 51.420 30.850 Total suspended solids 105.400 50.140 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Tungsten post-leaching wash and rinse. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten produced Copper 9.772 5.143 Nickel 9.875 6.532 Ammonia (as N) 685.600 301.400 Cobalt 20.263 8.897 Tungsten 35.800 14.300 Oil and grease 102.900 61.720 Total suspended solids 210.900 100.300 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) Synthetic scheelite filtrate. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of synthetic scheelite produced Copper 31.660 16.660 Nickel 31.990 21.160 Ammonia (as N) 2,221.000 976.300 Cobalt 65.644 28.824 Tungsten 116.000 46.320 Oil and grease 333.200 200.000 Total suspended solids 683.100 324.900 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Tungsten carbide leaching wet air pollution control. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten carbide scrap leached Copper 3.327 1.751 Nickel 3.362 2.224 Ammonia (as N) 233.400 102.600 Cobalt 6.899 3.029 Tungsten 12.190 4.868 Oil and grease 35.020 21.010 Total suspended solids 71.790 34.150 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Tungsten carbide wash water. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten carbide produced Copper 15.830 8.333 Nickel 16.000 10.580 Ammonia (as N) 1,111.000 488.300 Cobalt 32.832 14.416 Tungsten 58.000 23.170 Oil and grease 166.700 100.000 Total suspended solids 341.700 162.500 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (g) Cobalt sludge leaching wet air pollution control. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge Copper 67.990 35.780 Nickel 68.700 45.440 Ammonia (as N) 4,770.000 2,097.000 Cobalt 140.977 61.901 Tungsten 249.000 99.470 Oil and grease 715.600 429.400 Total suspended solids 1,467.000 697.700 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Crystallization decant. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 79.140 41.650 Nickel 79.970 52.900 Ammonia (as N) 5,552.000 2,441.000 Cobalt 164.101 72.055 Tungsten 289.900 115.800 Oil and grease 833.000 499.800 Total suspended solids 1,708.000 812.200 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Acid wash decant. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 36.220 19.060 Nickel 36.600 24.210 Ammonia (as N) 2,541.000 1,117.000 Cobalt 75.104 32.977 Tungsten 132.700 52.990 Oil and grease 381.300 228.800 Total suspended solids 781.600 371.700 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (j) Cobalt hydroxide filtrate. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 107.600 56.650 Nickel 108.800 71.940 Ammonia (as N) 7,551.000 3,320.000 Cobalt 223.189 97.999 Tungsten 394.300 157.500 Oil and grease 1,133.000 679.800 Total suspended solids 2,323.000 1,105.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (k) Cobalt hydroxide filter cake wash. BPT Limitations for the Secondary Tungsten and Cobalt Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 207.200 109.100 Nickel 209.400 138.500 Ammonia (as N) 14,530.000 6,389.000 Cobalt 429.598 188.631 Tungsten 758.900 303.100 Oil and grease 2,181.000 1,309.000 Total suspended solids 4,471.000 2,126.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. [50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31713, 31714, Aug. 3, 1990]