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Title 40: Protection of Environment
CHAPTER I: ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
SUBCHAPTER N: EFFLUENT GUIDELINES AND STANDARDS
PART 421: NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
Subpart AC: Secondary Tungsten and Cobalt Subcategory
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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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.
| 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) |
[50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31715, 31716, Aug. 3, 1990]
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