Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 274 - Nonferrous metals manufacturing › Subchapter XXXI - Secondary Tungsten and Cobalt › Section NR 274.313 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

Current through June 24, 2024
Except as provided in
					 40 CFR 125.30
					 to
					 125.32, any
					 existing point source subject to this subchapter shall achieve the following
					 effluent limitations representing the degree of effluent reduction attainable
					 by application of BAT:
Table 31-12
Secondary Tungsten and Cobalt Tungsten Detergent Wash and
					 Rinse
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-13
Secondary Tungsten and Cobalt Tungsten Leaching
					 Acid
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-14
Secondary Tungsten and Cobalt Tungsten Post Leaching Wash
					 and Rinse
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-15
Secondary Tungsten and Cobalt Synthetic Scheelite
					 Filtrate
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-16
Secondary Tungsten and Cobalt Tungsten Carbide Leaching
					 Wet Air Pollution Control
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-17
Secondary Tungsten and Cobalt Tungsten Carbide Wash
					 Water
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-18
Secondary Tungsten and Cobalt Cobalt Sludge Leaching Wet
					 Air Pollution Control
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-19
Secondary Tungsten and Cobalt Crystallization
					 Decant
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-20
Secondary Tungsten and Cobalt Acid Wash Decant
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-21
Secondary Tungsten and Cobalt Cobalt Hydroxide
					 Filtrate
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
Table 31-22
Secondary Tungsten and Cobalt Cobalt Hydroxide Filter Cake
					 Wash
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
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
131.094
Tungsten
379.400
169.000