Wis. Admin. Code Department of Natural Resources NR 273.023
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 2-9
Magnesium
Rolling 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 magnesium rolled with emulsions | |
Chromium | 0.033 | 0.014 |
Zinc | 0.109 | 0.046 |
Ammonia | 9.95 | 4.37 |
Fluoride | 4.44 | 1.97 |
Table 2-10
Magnesium
Forging 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 forged magnesium cooled with water | |
Chromium | 0.127 | 0.052 |
Zinc | 0.422 | 0.177 |
Ammonia | 38.5 | 17.0 |
Fluoride | 17.2 | 7.63 |
Table 2-11
Magnesium
Forging Equipment 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 forged magnesium | |
Chromium | 0.002 | 0.0007 |
Zinc | 0.006 | 0.003 |
Ammonia | 0.532 | 0.234 |
Fluoride | 0.238 | 0.106 |
Table 2-12
Magnesium
Direct Chill Casting 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 magnesium cast with direct chill methods | |
Chromium | 1.74 | 0.711 |
Zinc | 5.77 | 2.41 |
Ammonia | 527 | 232 |
Fluoride | 235 | 105 |
Table 2-13
Magnesium
Surface Treatment Spent Baths
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 magnesium surface treated | |
Chromium | 0.205 | 0.084 |
Zinc | 0.681 | 0.285 |
Ammonia | 62.1 | 27.3 |
Fluoride | 27.8 | 12.3 |
Table 2-14
Magnesium
Surface Treatment Rinse
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 magnesium surface treated | |
Chromium | 0.832 | 0.340 |
Zinc | 2.76 | 1.16 |
Ammonia | 252 | 111 |
Fluoride | 113 | 49.9 |
Table 2-15
Magnesium
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 magnesium sawed or ground | |
Chromium | 0.009 | 0.004 |
Zinc | 0.029 | 0.012 |
Ammonia | 2.60 | 1.15 |
Fluoride | 1.16 | 0.515 |
Table 2-16
Magnesium
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 magnesium sanded and repaired or forged | |
Chromium | 0.273 | 0.112 |
Zinc | 0.904 | 0.378 |
Ammonia | 82.5 | 36.3 |
Fluoride | 36.9 | 16.4 |
Wis. Admin. Code Department of Natural Resources NR 273.023