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 X - Metal Powders
Section NR 273.103 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
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 BAT:
Table 10-9
Metal Powders
Metal Powder Production Atomization Wastewater
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off- pounds) of powder wet atomized |
|
|
Copper |
9.58 |
5.04 |
|
Cyanide |
1.46 |
0.605 |
|
Lead |
2.12 |
1.01 |
Table 10-10
Metal Powders
Sizing Spent Emulsions
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder sized |
|
|
Copper |
0.028 |
0.015 |
|
Cyanide |
0.004 |
0.002 |
|
Lead |
0.006 |
0.003 |
Table 10-11
Metal Powders
Steam Treatment
Wet Air Pollution Control Scrubber Blowdown
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pound pounds) of powde steam treated |
s per million off-r metallurgy parts |
|
Copper |
1.51 |
0.792 |
|
Cyanide |
0.230 |
0.095 |
|
Lead |
0.333 |
0.159 |
Table 10-12
Metal Powders
Tumbling, Burnishing, and Cleaning Wastewater
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder metallurgy parts tumbled, burnished, or cleaned |
|
|
Copper |
8.36 |
4.40 |
|
Cyanide |
1.28 |
0.528 |
|
Lead |
1.85 |
0.880 |
Table 10-13
Metal Powders
Sawing or Grinding Spent Emulsions
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with emulsion |
|
|
Copper |
0.035 |
0.018 |
|
Cyanide |
0.005 |
0.002 |
|
Lead |
0.008 |
0.004 |
Table 10-14
Metal Powders
Sawing or Grinding
Contact Cooling Water
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with contact cooling water |
|
|
Copper |
3.08 |
1.62 |
|
Cyanide |
0.470 |
0.195 |
|
Lead |
0.681 |
0.324 |
Table 10-15
Metal Powders
Hot Pressing
Contact Cooling Water
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder cooled after pressing |
|
|
Copper |
16.7 |
8.80 |
|
Cyanide |
2.55 |
1.06 |
|
Lead |
3.70 |
1.76 |
Table 10-16
Metal Powders
Mixing
Wet Air Pollution Control Scrubber Blowdown
|
BAT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/off-kg (pounds per million off-pounds) of powder mixed |
|
|
Copper |
15.0 |
7.90 |
|
Cyanide |
2.29 |
0.948 |
|
Lead |
3.32 |
1.58 |
