Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XIV - Primary Antimony
Section NR 274.142 - 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 14-1
Primary Antimony Sodium Antimonate Autoclave Wastewater
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of antimony contained in sodium antimonate product |
|
|
Antimony |
44.840 |
20.000 |
|
Arsenic |
32.650 |
14.530 |
|
Mercury |
3.906 |
1.562 |
|
Total suspended solids |
640.600 |
304.700 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 14-2
Fouled Anolyte BPT Effluent Limitations
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds)of antimony metal produced by electrowinning |
|
|
Antimony |
44.840 |
20.000 |
|
Arsenic |
32.650 |
14.530 |
|
Mercury |
3.906 |
1.562 |
|
Total suspended solids |
640.600 |
304.700 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 14-3
Primary Antimony Cathode Antimony 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 antimony metal produced by electrowinning |
|
|
Antimony |
89.680 |
40.000 |
|
Arsenic |
65.310 |
29.060 |
|
Mercury |
7.812 |
3.125 |
|
Total suspended solids |
1,281.000 |
609.300 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
