Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 273 - Nonferrous metals forming and metal powders
Subchapter II - Magnesium
Section NR 273.024 - New source performance standards
Any new source subject to this subchapter shall achieve the following standards:
Table 2-17
Magnesium
Rolling Spent Emulsions
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions |
|
|
Chromium |
0.028 |
0.011 |
|
Zinc |
0.076 |
0.032 |
|
Ammonia |
9.95 |
4.37 |
|
Fluoride |
4.44 |
1.97 |
|
Oil and grease |
0.746 |
0.746 |
|
Total suspended solids |
1.12 |
0.895 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-18
Magnesium
Forging Contact Cooling Water
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of forged magnesium cooled with water |
|
|
Chromium |
0.107 |
0.044 |
|
Zinc |
0.295 |
0.122 |
|
Ammonia |
38.5 |
17.0 |
|
Fluoride |
17.2 |
7.63 |
|
Oil and grease |
2.89 |
2.89 |
|
Total suspended solids |
4.34 |
3.47 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-19
Magnesium
Forging Equipment Cleaning Wastewater
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of forged magnesium |
|
|
Chromium |
0.002 |
0.0006 |
|
Zinc |
0.004 |
0.002 |
|
Ammonia |
0.532 |
0.234 |
|
Fluoride |
0.238 |
0.106 |
|
Oil and grease |
0.040 |
0.040 |
|
Total suspended solids |
0.060 |
0.048 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-20
Magnesium
Direct Chill Casting Contact Cooling Water
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods |
|
|
Chromium |
1.46 |
0.593 |
|
Zinc |
4.03 |
1.66 |
|
Ammonia |
527 |
232 |
|
Fluoride |
235 |
105 |
|
Oil and grease |
39.5 |
39.5 |
|
Total suspended solids |
59.3 |
47.4 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-21
Magnesium
Surface Treatment Spent Baths
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium surface treated |
|
|
Chromium |
0.173 |
0.070 |
|
Zinc |
0.476 |
0.196 |
|
Ammonia |
62.1 |
27.3 |
|
Fluoride |
27.8 |
12.3 |
|
Oil and grease |
4.66 |
4.66 |
|
Total suspended solids |
6.99 |
5.6 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-22
Magnesium
Surface Treatment Rinse
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium surface treated |
|
|
Chromium |
0.700 |
0.284 |
|
Zinc |
1.93 |
0.794 |
|
Ammonia |
252 |
111 |
|
Fluoride |
113 |
49 |
|
Oil and grease |
18.9 |
18.9 |
|
Total suspended solids |
28.4 |
22.7 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-23
Magnesium
Sawing or Grinding Spent Emulsions
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground |
|
|
Chromium |
0.007 |
0.003 |
|
Zinc |
0.020 |
0.008 |
|
Ammonia |
2.60 |
1.15 |
|
Fluoride |
1.16 |
0.515 |
|
Oil and grease |
0.195 |
0.195 |
|
Total suspended solids |
0.293 |
0.234 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-24
Magnesium
Wet Air Pollution Control Scrubber Blowdown
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged |
|
|
Chromium |
0.229 |
0.093 |
|
Zinc |
0.632 |
0.260 |
|
Ammonia |
82.5 |
36.3 |
|
Fluoride |
36.9 |
16.4 |
|
Oil and grease |
6.19 |
6.19 |
|
Total suspended solids |
9.29 |
7.43 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times
