Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 274 - Nonferrous metals manufacturing › Subchapter XI - Primary Columbium-Tantalum › Section NR 274.112 - 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 11-1
Primary Columbium-Tantalum Concentrate Digestion 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 concentrate
								  digested
Lead
2.612
1.244
Zinc
9.080
3.794
Ammonia (as N)
829.000
364.500
Fluoride
217.700
124.400
Total suspended solids
255.000
121.300
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-2
Primary Columbium-Tantalum Solvent Extraction
					 Raffinate
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of concentrate
								  digested
Lead
3.888
1.851
Zinc
13.520
5.647
Ammonia (as N)
1,233.000
542.500
Fluoride
324.000
185.100
Total suspended solids
379.500
189.500
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-3
Primary Columbium-Tantalum Solvent Extraction 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 concentrate
								  digested
Lead
1.032
0.491
Zinc
3.586
1.498
Ammonia (as N)
327.400
143.900
Fluoride
85.960
49.120
Total suspended solids
100.700
47.890
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-4
Primary Columbium-Tantalum Precipitation and
					 Filtration
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of concentrate
								  digested
Lead
5.750
2.738
Zinc
19.990
8.350
Ammonia (as N)
1,825.000
802.200
Fluoride
479.100
273.800
Total suspended solids
561.300
267.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-5
Primary Columbium-Tantalum Precipitation and Filtration 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 concentrate
								  digested
Lead
26.680
12.700
Zinc
92.730
38.740
Ammonia (as N)
8,466.000
3,722.000
Fluoride
2,223.000
1,270.000
Total suspended solids
2,604.000
1,239.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-6
Primary Columbium-Tantalum Tantalum Salt Drying
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of tantalum
								  salt dried
Lead
25.430
12.110
Zinc
88.390
36.930
Ammonia (as N)
8,070.000
3,548.000
Fluoride
2,119.000
1,211.000
Total suspended solids
2,482.000
1,181.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-7
Primary Columbium-Tantalum Oxides Calcining 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
								  columbium-tantalum oxide dried
Lead
16.140
7.685
Zinc
56.100
23.440
Ammonia (as N)
5,122.000
2,252.000
Fluoride
1,345.000
768.500
Total suspended solids
1,576.000
749.200
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-8
Primary Columbium-Tantalum Reduction of Tantalum Salt to
					 Metal
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of tantalum
								  salt reduced
Lead
69.750
33.220
Zinc
242.500
101.300
Ammonia (as N)
22,140.000
9,732.000
Fluoride
5,813.000
3,322.000
Total suspended solids
6,809.000
3,239.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-9
Primary Columbium-Tantalum Reduction of Tantalum Salt to
					 Metal 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 tantalum
								  salt reduced
Lead
0.858
0.409
Zinc
2.983
1.246
Ammonia (as N)
272.400
119.700
Fluoride
71.510
40.860
Total suspended solids
83.770
39.840
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-10
Primary Columbium-Tantalum Tantalum Powder Wash
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of tantalum
								  powder washed
Lead
8.582
4.087
Zinc
29.830
12.470
Ammonia (as N)
2,724.400
1,198.000
Fluoride
715.200
408.700
Total suspended solids
837.800
398.500
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 11-11
Primary Columbium-Tantalum Consolidation and Casting
					 Contact Cooling
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/kg (pounds per million pounds) of columbium or
								  tantalum cast or
consolidated
Lead
0.000
0.000
Zinc
0.000
0.000
Ammonia (as N)
0.000
0.000
Fluoride
0.000
0.000
Total suspended solids
0.000
0.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.