Wis. Admin. Code Department of Natural Resources NR 257.24
Any new source subject to this subchapter shall achieve the following performance standards:
Table 48
Core operation NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions | ||
Chromium | 0.048 | 0.020 |
Cyanide | 0.026 | 0.011 |
Zinc | 0.133 | 0.055 |
Aluminum | 0.80 | 0.35 |
Oil and grease | 1.30 | 1.30 |
Suspended solids | 1.95 | 1.56 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 49
Direct chill casting contact cooling water NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cast by continuous methods | ||
Chromium | 0.49 | 0.20 |
Cyanide | 0.27 | 0.11 |
Zinc | 1.36 | 0.56 |
Aluminum | 8.12 | 3.60 |
Oil and grease | 13.29 | 13.29 |
Suspended solids | 19.94 | 15.95 |
pH | (1) | (1) |
1 The pH shall be maintained within the range of 7.0 to 10.0 at all times, except for those situations when this waste stream is discharged separately and without commingling with any other wastewater, in which case the pH shall be within the range of 6.0 to 10.0 at all times.
Table 50
Solution heat treatment contact cooling water NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
Chromium | 0.76 | 0.31 |
Cyanide | 0.41 | 0.17 |
Zinc | 2.08 | 0.86 |
Aluminum | 12.45 | 5.52 |
Oil and grease | 20.37 | 20.37 |
Suspended solids | 30.56 | 24.45 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 51
Cleaning or etching bath NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | ||
Chromium | 0.067 | 0.027 |
Cyanide | 0.036 | 0.015 |
Zinc | 0.183 | 0.075 |
Aluminum | 1.094 | 0.485 |
Oil and grease | 1.79 | 1.79 |
Suspended solids | 2.69 | 2.15 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 52
Cleaning or etching rinse and hot water seal NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | ||
Chromium | 0.52 | 0.21 |
Cyanide | 0.28 | 0.11 |
Zinc | 1.42 | 0.59 |
Aluminum | 8.50 | 3.77 |
Oil and grease | 13.91 | 13.91 |
Suspended solids | 20.87 | 16.70 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 53
Cleaning or etching scrubber liquor NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | ||
Chromium | 0.72 | 0.29 |
Cyanide | 0.39 | 0.16 |
Zinc | 1.97 | 0.81 |
Aluminum | 11.81 | 5.24 |
Oil and grease | 19.33 | 19.33 |
Suspended solids | 29.00 | 23.20 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Wis. Admin. Code Department of Natural Resources NR 257.24