40 CFR 421.312 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

§ 421.312 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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
(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
1 Within the range of 7.5 to 10.0 at all times.
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)
[50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31713, 31714, Aug. 3, 1990]

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