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
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.
