Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XXVII - Primary Rare Earth Metals
Section NR 274.274 - New source performance standards
Any new source subject to this subchapter shall achieve the following standards:
Table 27-1
Primary Rare Earth Metals Dryer Vent Water Quench and Scrubber
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of mischmetal produced from wet rare earth chlorides |
|
|
Hexachlorobenzene |
0.042 |
0.042 |
|
Chromium |
1.544 |
0.626 |
|
Lead |
1.168 |
0.542 |
|
Nickel |
2.295 |
1.544 |
|
Total suspended solids |
62.600 |
50.080 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 27-2
Primary Rare Earth Metals Dryer Vent Caustic Wet Air Pollution Control
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of mischmetal produced from wet rare earth chlorides |
|
|
Hexachlorobenzene |
0.007 |
0.007 |
|
Chromium |
0.272 |
0.110 |
|
Lead |
0.206 |
0.095 |
|
Nickel |
0.404 |
0.272 |
|
Total suspended solids |
11.010 |
8.808 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 27-3
Primary Rare Earth Metals Electrolytic Cell Water Quench and Scrubber
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of total mischmetal produced |
|
|
Hexachlorobenzene |
0.094 |
0.094 |
|
Chromium |
3.474 |
1.409 |
|
Lead |
2.629 |
1.221 |
|
Nickel |
5.165 |
3.474 |
|
Total suspended solids |
140.900 |
112.700 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 27-4
Primary Rare Earth Metals Electrolytic Cell Caustic Wet Air Pollution Control
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of total mischmetal produced |
|
|
Hexachlorobenzene |
0.000 |
0.000 |
|
Chromium |
0.000 |
0.000 |
|
Lead |
0.000 |
0.000 |
|
Nickel |
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.
Table 27-5
Primary Rare Earth Metals Sodium Hypochlorite Filter Backwash
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of total mischmetal produced |
|
|
Hexachlorobenzene |
0.004 |
0.004 |
|
Chromium |
0.134 |
0.054 |
|
Lead |
0.101 |
0.047 |
|
Nickel |
0.199 |
0.134 |
|
Total suspended solids |
5.430 |
4.334 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
