Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (pounds per million off-pounds) of magnesium forged | ||
Chromium | 0.002 | 0.0007 |
Zinc | 0.006 | 0.003 |
Ammonia | 0.532 | 0.234 |
Fluoride | 0.238 | 0.106 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
Subpart B-BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
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 |
40 C.F.R. §471.22