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 274.312 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

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 BPT:
Table 31-1
Secondary Tungsten and Cobalt Tungsten Detergent Wash and
					 Rinse
BPT 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
0.371
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-2
Secondary Tungsten and Cobalt Tungsten Leaching
					 Acid
BPT 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
4.885
2.571
Nickel
4.937
3.365
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-3
Secondary Tungsten and Cobalt Tungsten Post Leaching Wash
					 and Rinse
BPT 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
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-4
Secondary Tungsten and Cobalt Synthetic Scheelite Filtrate
BPT 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
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
683.000
324.900
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-5
Secondary Tungsten and Cobalt Tungsten Carbide Leaching
					 Wet Air Pollution Control
BPT 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
3.327
1.751
Nickel
3.362
2.224
Ammonia (as N)
233.400
102.600
Cobalt
6.899
3.039
Tungsten
12.190
4.868
Oil and grease
35.020
21.010
Total suspended solids
71.790
34.150
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-6
Secondary Tungsten and Cobalt Tungsten Carbide Wash
					 Water
BPT 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
15.830
8.333
Nickel
16.000
10.580
Ammonia (as N)
1,111.000
488.300
Cobalt
32.832
14.146
Tungsten
58.000
23.170
Oil and grease
166.700
100.000
Total suspended solids
341.700
162.500
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-7
Secondary Tungsten and Cobalt Cobalt Sludge Leaching Wet
					 Air Pollution Control BPT Effluent Limitations
BPT 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
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-8
Secondary Tungsten and Cobalt Crystallization
					 Decant
(1) Within the range of 7.5 to 10.0 at all times.
BPT 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
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)
Table 31-9
Secondary Tungsten and Cobalt Acid Wash Decant
BPT 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
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-10
Secondary Tungsten and Cobalt Cobalt Hydroxide Filtrate
BPT 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
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)
(1) Within the range of 7.5 to 10.0 at all times.
Table 31-11
Secondary Tungsten and Cobalt Cobalt Hydroxide Filter Cake
					 Wash
BPT 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
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)
(1) Within the range of 7.5 to 10.0 at all times.