Regulations last checked for updates: May 01, 2025
Title 40 - Protection of Environment last revised: Nov 01, 2025
§ 421.310 - Applicability: Description of the secondary tungsten and cobalt subcategory.
The provisions of this subpart are applicable to discharges resulting from the production of tungsten or cobalt at secondary tungsten and cobalt facilities processing tungsten or tungsten carbide scrap raw materials.
§ 421.311 - Specialized definitions.
For the purpose of this subpart the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.
§ 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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
|
|---|
| 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)
|
§ 421.313 - 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) Tungsten detergent wash and rinse.
BAT 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 | 0.250 | 0.119
|
| Nickel | 0.107 | 0.072
|
| Ammonia (as N) | 25.990 | 11.430
|
| Cobalt | 0.538 | 0.236
|
| Tungsten | 0.679 | 0.302 |
(b) Tungsten leaching acid.
BAT 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 | 3.291 | 1.569
|
| Nickel | 1.414 | 0.951
|
| Ammonia (as N) | 342.700 | 150.700
|
| Cobalt | 7.096 | 3.111
|
| Tungsten | 8.947 | 3.985 |
(c) Tungsten post-leaching wash and rinse.
BAT 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 | 6.583 | 3.137
|
| Nickel | 2.829 | 1.903
|
| Ammonia (as N) | 685.600 | 301.400
|
| Cobalt | 14.194 | 6.223
|
| Tungsten | 17.900 | 7.972 |
(d) Synthetic scheelite filtrate.
BAT 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 | 21.330 | 10.170
|
| Nickel | 9.164 | 6.165
|
| Ammonia (as N) | 2,221.000 | 976.300
|
| Cobalt | 45.984 | 20.160
|
| Tungsten | 57.980 | 25.820 |
(e) Tungsten carbide leaching wet air pollution control.
BAT 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 | 2.241 | 1.068
|
| Nickel | 0.963 | 0.648
|
| Ammonia (as N) | 233.400 | 102.600
|
| Cobalt | 4.833 | 2.119
|
| Tungsten | 6.093 | 2.714 |
(f) Tungsten carbide wash water.
BAT 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 | 10.670 | 5.083
|
| Nickel | 4.583 | 3.083
|
| Ammonia (as N) | 1,111.000 | 488.300
|
| Cobalt | 22.999 | 10.083
|
| Tungsten | 29.000 | 12.920 |
(g) Cobalt sludge leaching wet air pollution control.
BAT 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 | 45.80 | 21.83
|
| Nickel | 19.68 | 13.24
|
| Ammonia (as N) | 4,770.00 | 2,097.00
|
| Cobalt | 98.756 | 43.295
|
| Tungsten | 124.50 | 55.46 |
(h) Crystallization decant.
BAT 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 | 53,310 | 25.410
|
| Nickel | 22.910 | 15.410
|
| Ammonia (as N) | 5,552.000 | 2,441.000
|
| Cobalt | 114.954 | 50.397
|
| Tungsten | 144.900 | 64.560 |
(i) Acid wash decant.
BAT 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 | 24.400 | 11.630
|
| Nickel | 10.490 | 7.053
|
| Ammonia (as N) | 2,541.000 | 1,117.000
|
| Cobalt | 52.611 | 23.065
|
| Tungsten | 66.340 | 29.550 |
(j) Cobalt hydroxide filtrate.
BAT 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 | 72.510 | 34.560
|
| Nickel | 31.160 | 20.960
|
| Ammonia (as N) | 7,551.000 | 3,320.000
|
| Cobalt | 156.346 | 68.543
|
| Tungsten | 197.100 | 87.800 |
(k) Cobalt hydroxide filter cake wash.
BAT 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 | 139.600 | 66.510
|
| Nickel | 59.970 | 40.340
|
| Ammonia (as N) | 14,530.000 | 6,389.000
|
| Cobalt | 300.094 | 131.932
|
| Tungsten | 379.400 | 169.000 |
§ 421.314 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Tungsten detergent wash and rinse.
NSPS 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 | 0.250 | 0.119
|
| Nickel | 0.107 | 0.072
|
| Ammonia (as N) | 25.990 | 11.430
|
| Cobalt | 0.538 | 0.236
|
| Tungsten | 0.679 | 0.302
|
| Oil and grease | 1.950 | 1.950
|
| Total suspended solids | 2.925 | 2.340
|
| pH | (
1) | (
1)
|
(b) Tungsten leaching acid.
NSPS 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 | 3.291 | 1.569
|
| Nickel | 1.414 | 0.951
|
| Ammonia (as N) | 342.700 | 150.700
|
| Cobalt | 7.096 | 3.111
|
| Tungsten | 8.947 | 3.985
|
| Oil and grease | 25.710 | 25.710
|
| Total suspended solids | 38.570 | 30.850
|
| pH | (
1) | (
1)
|
(c) Tungsten post-leaching wash and rinse.
NSPS 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 | 6.583 | 3.137
|
| Nickel | 2.829 | 1.903
|
| Ammonia (as N) | 685.600 | 301.400
|
| Tungsten | 17.900 | 7.972
|
| Cobalt | 14.194 | 6.223
|
| Oil and grease | 51.430 | 51.430
|
| Total suspended solids | 77.150 | 61.720
|
| pH | (
1) | (
1)
|
(d) Synthetic scheelite filtrate.
NSPS 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 | 21.330 | 10.170
|
| Nickel | 9.164 | 6.165
|
| Ammonia (as N) | 2,221.000 | 976.300
|
| Cobalt | 45.984 | 20.160
|
| Tungsten | 57.980 | 25.820
|
| Oil and grease | 166.600 | 166.600
|
| Total suspended solids | 249.900 | 199.900
|
| pH | (
1) | (
1)
|
(e) Tungsten carbide leaching wet air pollution control.
NSPS 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 | 2.241 | 1.068
|
| Nickel | 0.963 | 0.648
|
| Ammonia (as N) | 233.400 | 102.600
|
| Cobalt | 4.833 | 2.119
|
| Tungsten | 6.093 | 2.714
|
| Oil and grease | 17.510 | 17.510
|
| Total suspended solids | 26.270 | 21.010
|
| pH | (
1) | (
1)
|
(f) Tungsten carbide wash water.
NSPS 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 | 10.670 | 5.083
|
| Nickel | 4.583 | 3.083
|
| Ammonia (as N) | 1,111.000 | 488.300
|
| Cobalt | 22.999 | 10.083
|
| Tungsten | 29.000 | 12.920
|
| Oil and grease | 83.330 | 83.330
|
| Total suspended solids | 125.000 | 100.000
|
| pH | (
1) | (
1)
|
(g) Cobalt sludge leaching wet air pollution control.
NSPS 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 | 45.80 | 21.83
|
| Nickel | 19.68 | 13.24
|
| Ammonia (as N) | 4,770.00 | 2,097.00
|
| Cobalt | 98.756 | 43.295
|
| Tungsten | 124.50 | 55.46
|
| Oil and grease | 357.80 | 357.80
|
| Total suspended solids | 536.70 | 429.40
|
| pH | (
1) | (
1)
|
(h) Crystallization decant.
NSPS 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 | 53.310 | 25.410
|
| Nickel | 22.910 | 15.410
|
| Ammonia (as N) | 5,552.000 | 2,441.000
|
| Cobalt | 114.954 | 50.397
|
| Tungsten | 144.900 | 64.560
|
| Oil and grease | 416.500 | 416.500
|
| Total suspended solids | 624.800 | 499.800
|
| pH | (
1) | (
1)
|
(i) Acid wash decant.
NSPS 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 | 24.400 | 11.630
|
| Nickel | 10.490 | 7.053
|
| Ammonia (as N) | 2,541.000 | 1,117.000
|
| Cobalt | 52.611 | 23.065
|
| Tungsten | 66.340 | 29.550
|
| Oil and grease | 190.600 | 190.600
|
| Total suspended solids | 285.900 | 228.700
|
| pH | (
1) | (
1)
|
(j) Cobalt hydroxide filtrate.
NSPS 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 | 72.510 | 34.560
|
| Nickel | 31.160 | 20.960
|
| Ammonia (as N) | 7,551.000 | 3,320.000
|
| Cobalt | 156.346 | 68.543
|
| Tungsten | 197.100 | 87.800
|
| Oil and grease | 566.500 | 566.500
|
| Total suspended solids | 849.700 | 679.800
|
| pH | (
1) | (
1)
|
(k) Cobalt hydroxide filter cake wash.
NSPS 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 | 139.600 | 66.510
|
| Nickel | 59.970 | 40.340
|
| Ammonia (as N) | 14,530.000 | 6,389.000
|
| Cobalt | 300.094 | 131.932
|
| Tungsten | 379.400 | 169.000
|
| Oil and grease | 1,090.000 | 1,090.000
|
| Total suspended solids | 1,636,000 | 1,308.000
|
| pH | (
1) | (
1)
|
§ 421.315 - Pretreatment standards for existing sources.
Except as provided in 40 CFR 403.7, any existing source subject to this subpart which introduces polutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary tungsten and cobalt process wastewater introduced into a POTW shall not exceed the following values:
(a) Tungsten detergent wash and rinse.
PSES 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 | 0.250 | 0.119
|
| Nickel | 0.107 | 0.072
|
| Ammonia (as N) | 25.990 | 11.430
|
| Cobalt | 0.538 | 0.236
|
| Tungsten | 0.679 | 0.302 |
(b) Tungsten leaching acid.
PSES 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 | 3.291 | 1.569
|
| Nickel | 1.414 | 0.951
|
| Ammonia (as N) | 342.700 | 150.700
|
| Cobalt | 7.096 | 3.111
|
| Tungsten | 8.947 | 3.985 |
(c) Tungsten post-leaching wash and rinse.
PSES 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 | 6.583 | 3.137
|
| Nickel | 2.829 | 1.903
|
| Ammonia (as N) | 685.600 | 301.400
|
| Cobalt | 14.194 | 6.223
|
| Tungsten | 17.900 | 7.972 |
(d) Synthetic scheelite filtrate.
PSES 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 | 21.330 | 10.170
|
| Nickel | 9.164 | 6.165
|
| Ammonia (as N) | 2,221.000 | 976.300
|
| Cobalt | 45.984 | 20.160
|
| Tungsten | 57.980 | 25.820 |
(e) Tungsten carbide leaching wet air pollution control.
PSES 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
|
| Copper | 2.241 | 1.068
|
| Nickel | 0.963 | 0.648
|
| Ammonia (as N) | 233.400 | 102.600
|
| Cobalt | 4.833 | 2.119
|
| Tungsten | 6.093 | 2.714 |
(f) Tungsten carbide wash water.
PSES 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 | 10.670 | 5.083
|
| Nickel | 4.583 | 3.083
|
| Ammonia (as N) | 1,111.000 | 488.300
|
| Cobalt | 22.999 | 10.083
|
| Tungsten | 29.000 | 12.920 |
(g) Cobalt sludge leaching wet air pollution control.
PSES 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 | 45.800 | 21.830
|
| Nickel | 19.680 | 13.240
|
| Ammonia (as N) | 4,770.000 | 2,097.000
|
| Cobalt | 98.756 | 43.295
|
| Tungsten | 124.500 | 55.460 |
(h) Crystallization decant.
PSES 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 | 53.310 | 25.410
|
| Nickel | 22.910 | 15.410
|
| Ammonia (as N) | 5,552.000 | 2,441.000
|
| Cobalt | 114.954 | 50.397
|
| Tungsten | 144.9 | 64.56 |
(i) Acid wash decant.
PSES 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 | 24.400 | 11.630
|
| Nickel | 10.490 | 7.053
|
| Ammonia (as N) | 2,541.000 | 1,117.000
|
| Cobalt | 52.611 | 23.065
|
| Tungsten | 66.34 | 29.55 |
(j) Cobalt hydroxide filtrate.
PSES 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 | 72.510 | 34.560
|
| Nickel | 31.160 | 20.960
|
| Ammonia (as N) | 7,551.000 | 3,320.000
|
| Cobalt | 156.346 | 68.543
|
| Tungsten | 197.1 | 87.8 |
(k) Cobalt hydroxide filter cake wash.
PSES 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 | 139.600 | 66.510
|
| Nickel | 59.970 | 40.340
|
| Ammonia (as N) | 14,530.000 | 6,389.000
|
| Cobalt | 300.094 | 131.932
|
| Tungsten | 379.400 | 169.000 |
§ 421.316 - Pretreatment standards for new sources.
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in secondary tungsten and cobalt process wastewater introduced into a POTW shall not exceed the following values:
(a) Tungsten detergent wash and rinse.
PSNS 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 | 0.250 | 0.119
|
| Nickel | 0.107 | 0.072
|
| Ammonia (as N) | 25.990 | 11.430
|
| Cobalt | 0.538 | 0.236
|
| Tungsten | 0.679 | 0.302 |
(b) Tungsten leaching acid.
PSNS 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 | 3.291 | 1.569
|
| Nickel | 1.414 | 0.951
|
| Ammonia (as N) | 342.700 | 150.700
|
| Cobalt | 7.096 | 3.111
|
| Tungsten | 8.947 | 3.985 |
(c) Tungsten post-leaching wash and rinse.
PSNS 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 | 6.583 | 3.137
|
| Nickel | 2.829 | 1.903
|
| Ammonia (as N) | 685.600 | 301.400
|
| Cobalt | 14.194 | 6.223
|
| Tungsten | 17.900 | 7.792 |
(d) Synthetic scheelite filtrate.
PSNS 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 | 21.330 | 10.170
|
| Nickel | 9.164 | 6.165
|
| Ammonia (as N) | 2,221.000 | 976.300
|
| Cobalt | 45.984 | 20.160
|
| Tungsten | 57.980 | 25.820 |
(e) Tungsten carbide leaching wet air pollution control.
PSNS 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 | 2.241 | 1.068
|
| Nickel | 0.963 | 0.648
|
| Ammonia (as N) | 233.400 | 102.600
|
| Cobalt | 4.833 | 2.119
|
| Tungsten | 6.093 | 2.714 |
(f) Tungsten carbide wash water.
PSNS 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 | 10.670 | 5.083
|
| Nickel | 4.583 | 3.083
|
| Ammonia (as N) | 1,111.000 | 488.300
|
| Cobalt | 22.999 | 10.083
|
| Tungsten | 29.000 | 12.920 |
(g) Cobalt sludge leaching wet air pollution control.
PSNS 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 | 45.800 | 21.830
|
| Nickel | 19.680 | 13.240
|
| Ammonia (as N) | 4,770.000 | 2,097.000
|
| Cobalt | 98.756 | 43.295
|
| Tungsten | 124.500 | 55.460 |
(h) Crystallization decant.
PSNS 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 | 53.310 | 25.410
|
| Nickel | 22.910 | 15.410
|
| Ammonia (as N) | 5,552,000 | 2,441.000
|
| Cobalt | 114.954 | 50.397
|
| Tungsten | 144.900 | 64.560 |
(i) Acid wash decant.
PSNS 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 | 24.400 | 11.630
|
| Nickel | 10.490 | 7.053
|
| Ammonia (as N) | 2,541.000 | 1,117.000
|
| Cobalt | 52.611 | 23.065
|
| Tungsten | 66.340 | 29.550 |
(j) Cobalt hydroxide filtrate.
PSNS 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 | 72.510 | 34.560
|
| Nickel | 31.160 | 20.960
|
| Ammonia (as N) | 7,551.000 | 3,320.000
|
| Cobalt | 156.346 | 68.543
|
| Tungsten | 197.100 | 87.800 |
(k) Cobalt hydroxide filter cake wash.
PSNS 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 | 139.600 | 66.510
|
| Nickel | 59.970 | 40.430
|
| Ammonia (as N) | 14,530.000 | 6,389.000
|
| Cobalt | 300.094 | 131.932
|
| Tungsten | 379.400 | 169.000 |
§ 421.317 - [Reserved]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”);
33 U.S.C. 1311,
1314,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.310