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 273.102 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

Current through June 24, 2024
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 10-1
Metal Powders
Metal Powder Production Atomization Wastewater
BPT 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
Oil and grease
101
60.5
Total suspended solids
207
98.3
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-2
Metal Powders
Sizing Spent Emulsions
BPT 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
Oil and grease
0.292
0.175
Total suspended solids
0.599
0.285
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-3
Metal Powders
Steam Treatment
Wet Air Pollution Control Scrubber Blowdown
BPT 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 steam treated
Copper
1.51
0.792
Cyanide
0.230
0.095
Lead
0.333
0.159
Oil and grease
15.9
9.51
Total suspended solids
32.5
15.5
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-4
Metal Powders
Tumbling, Burnishing, and Cleaning Wastewater
BPT 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
Oil and grease
88.0
52.800
Total suspended solids
181
85.8
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-5
Metal Powders
Sawing or Grinding Spent Emulsions
BPT 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
Oil and grease
0.362
0.217
Total suspended solids
0.742
0.353
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-6
Metal Powders
Sawing or Grinding Contact Cooling Water
BPT 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
Oil and grease
32.4
19.5
Total suspended solids
66.4
31.6
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-7
Metal Powders
Hot Pressing Contact Cooling Water
BPT 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
Oil and grease
176
106
Total suspended solids
361
172
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 10-8
Metal Powders
Mixing Wet Air Pollution Control Scrubber Blowdown
BPT 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
Oil and grease
158
94.8
Total suspended solids
324
154
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all
					 times