Any new source subject to this subpart must achieve the following new source performance standards. The mass of pollutants in the magnesium forming process wastewater shall not exceed the following values:
Subpart B-NSPS
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 | 0.028 | 0.011 |
Zinc | 0.076 | 0.032 |
Ammonia | 9.95 | 4.37 |
Fluoride | 4.44 | 1.97 |
Oil and grease | 0.746 | 0.746 |
TSS | 1.12 | 0.895 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart B-NSPS
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 | 0.107 | 0.044 |
Zinc | 0.295 | 0.122 |
Ammonia | 38.5 | 17.0 |
Fluoride | 17.2 | 7.63 |
Oil and grease | 2.89 | 2.89 |
TSS | 4.34 | 3.47 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart B-NSPS
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 | 0.0006 |
Zinc | 0.004 | 0.002 |
Ammonia | 0.532 | 0.234 |
Fluoride | 0.238 | 0.106 |
Oil and grease | 0.040 | 0.040 |
TSS | 0.060 | 0.048 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart B-NSPS
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 | 1.46 | 0.593 |
Zinc | 4.03 | 1.66 |
Ammonia | 527 | 232 |
Fluoride | 235 | 105 |
Oil and grease | 39.5 | 39.5 |
TSS | 59.3 | 47.4 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart B-NSPS
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 | 0.173 | 0.070 |
Zinc | 0.476 | 0.196 |
Ammonia | 62.1 | 27.3 |
Fluoride | 27.8 | 12.3 |
Oil and grease | 4.66 | 4.66 |
TSS | 6.99 | 5.60 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times
Subpart B-NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (pound pers million off-pounds) of magnesium surface treated | ||
Chromium | 0.700 | 0.284 |
Zinc | 1.93 | 0.794 |
Ammonia | 252 | 111 |
Fluoride | 113 | 49 |
Oil and grease | 18.9 | 18.9 |
TSS | 28.4 | 22.7 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times
Subpart B-NSPS
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 | 0.007 | 0.003 |
Zinc | 0.020 | 0.008 |
Ammonia | 2.60 | 1.15 |
Fluoride | 1.16 | 0.515 |
Oil and grease | 0.195 | 0.195 |
TSS | 0.293 | 0.234 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart B-NSPS
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 | 0.229 | 0.093 |
Zinc | 0.632 | 0.260 |
Ammonia | 82.5 | 36.3 |
Fluoride | 36.9 | 16.4 |
Oil and grease | 6.19 | 6.19 |
TSS | 9.29 | 7.43 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
40 C.F.R. §471.23