Wis. Admin. Code Department of Natural Resources NR 273.022
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 2-1
Magnesium
Rolling 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 magnesium rolled with emulsions | |
Chromium | 0.033 | 0.014 |
Zinc | 0.109 | 0.046 |
Ammonia | 9.95 | 4.37 |
Fluoride | 4.440 | 1.97 |
Oil and grease | 1.49 | 0.895 |
Total suspended solids | 3.06 | 1.46 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-2
Magnesium
Forging 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 forged magnesium cooled with water | |
Chromium | 1.27 | 0.520 |
Zinc | 4.22 | 1.77 |
Ammonia | 385 | 170 |
Fluoride | 172 | 76.3 |
Oil and grease | 57.8 | 34.7 |
Total suspended solids | 119 | 56.4 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-3
Magnesium
Forging Equipment 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 forged magnesium | |
Chromium | 0.018 | 0.007 |
Zinc | 0.059 | 0.025 |
Ammonia | 5.32 | 2.34 |
Fluoride | 2.38 | 1.06 |
Oil and grease | 0.798 | 0.479 |
Total suspended solids | 1.64 | 0.778 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-4
Magnesium
Direct Chill Casting 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 magnesium cast with direct chill methods | |
Chromium | 1.74 | 0.711 |
Zinc | 5.77 | 2.41 |
Ammonia | 527 | 232 |
Fluoride | 235 | 105 |
Oil and grease | 79.0 | 47.4 |
Total suspended solids | 162 | 77.1 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-5
Magnesium
Surface Treatment Spent Baths
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 magnesium surface treated | |
Chromium | 0.205 | 0.084 |
Zinc | 0.681 | 0.285 |
Ammonia | 62.1 | 27.3 |
Fluoride | 27.8 | 12.3 |
Oil and grease | 9.32 | 5.59 |
Total suspended solids | 19.1 | 9.09 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-6
Magnesium
Surface Treatment Rinse
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 magnesium surface treated | |
Chromium | 8.32 | 3.4 |
Zinc | 27.6 | 11.5 |
Ammonia | 2520 | 1110 |
Fluoride | 1130 | 499 |
Oil and grease | 378 | 227 |
Total suspended solids | 775 | 369 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-7
Magnesium
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 magnesium sawed or ground | |
Chromium | 0.009 | 0.004 |
Zinc | 0.029 | 0.012 |
Ammonia | 2.60 | 1.15 |
Fluoride | 1.16 | 0.515 |
Oil and grease | 0.390 | 0.234 |
Total suspended solids | 0.800 | 0.381 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 2-8
Magnesium
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 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 |
Oil and grease | 12.4 | 7.43 |
Total suspended solids | 25.4 | 12.1 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Wis. Admin. Code Department of Natural Resources NR 273.022