Except as provided in 40 CFR 403.7 and 403.13 , any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and by August 23, 1988 achieve the following pretreatment standards for existing sources (PSES). The mass of wastewater pollutants in magnesium forming process wastewater introduced into a POTW shall not exceed the following values:
Subpart B-PSES
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-PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (pounds per million off-pounds) of 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-PSES
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-PSES
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 | ||
Chromiun | 1.74 | 0.711 |
Zinc | 5.77 | 2.41 |
Ammonia | 527 | 232 |
Fluoride | 235 | 105 |
Subpart B-PSES
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 | ||
Chromiun | 0.205 | 0.084 |
Zinc | 0.681 | 0.285 |
Ammonia | 62.1 | 27.3 |
Fluoride | 27.8 | 12.3 |
Subpart B-PSES
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 | ||
Chromiun | 0.832 | 0.340 |
Zinc | 2.76 | 1.16 |
Ammonia | 252 | 111 |
Fluoride | 113 | 49.9 |
Subpart B-PSES
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 | ||
Chromiun | 0.009 | 0.004 |
Zinc | 0.029 | 0.012 |
Ammonia | 2.60 | 1.15 |
Fluoride | 1.16 | 0.515 |
Subpart B-PSES
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 | 8.25 | 36.3 |
Fluoride | 36.9 | 16.4 |
40 C.F.R. §471.24