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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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 |
BAT Limitations for the Secondary Tungsten and Cobalt Subcategory
|
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
|
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
|
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 |
[50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31714, 31715, Aug. 3, 1990]