Wis. Admin. Code Department of Natural Resources NR 257.25
Except as provided in ss. NR 211.13 and 211.14, any existing source subject to this subchapter which introduces pollutants into a POTW shall comply with ch. NR 211 and achieve the following pretreatment standards for existing sources
Table 54
Core operation PSES
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 | 0.057 | 0.024 |
Cyanide | 0.038 | 0.016 |
Zinc | 0.190 | 0.079 |
TTO | 0.090 | |
Oil and grease (alternate monitoring parameter) | 6.80 | 3.40 |
Table 55
Direct chill casting contact cooling water PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods | ||
Chromium | 0.59 | 0.24 |
Cyanide | 0.39 | 0.16 |
Zinc | 1.94 | 0.81 |
TTO | 0.92 | |
Oil and grease (alternate monitoring parameter) | 69.0 | 35.0 |
Table 56
Solution heat treatment contact cooling water PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
Chromium | 0.90 | 0.37 |
Cyanide | 0.59 | 0.25 |
Zinc | 2.98 | 1.25 |
TTO | 1.41 | |
Oil and grease (alternate monitoring parameter) | 110.0 | 53.0 |
Table 57
Cleaning or etching bath PSES
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 | 0.079 | 0.032 |
Cyanide | 0.052 | 0.022 |
Zinc | 0.262 | 0.109 |
TTO | 0.124 | |
Oil and grease (alternate monitoring parameter) | 9.30 | 4.70 |
Table 58
Cleaning or etching rinse and hot water seal PSES
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 | 0.61 | 0.25 |
Cyanide | 0.41 | 0.17 |
Zinc | 2.03 | 0.85 |
TTO | 0.96 | |
Oil and grease (alternate monitoring parameter) | 73.0 | 36.0 |
Table 59
Cleaning or etching scrubber liquor PSES
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 | 0.85 | 0.35 |
Cyanide | 0.56 | 0.23 |
Zinc | 2.83 | 1.18 |
TTO | 1.34 | |
Oil and grease (alternate monitoring parameter) | 100.0 | 50.0 |
Wis. Admin. Code Department of Natural Resources NR 257.25