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421.115—Pretreatment standards for existing sources.
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 achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in primary columbium-tantalum process wastewater introduced into a POTW shall not exceed the following values:
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | .174 | .081 |
| Zinc | .635 | .261 |
| Ammonia (as N) | 82.910 | 36.450 |
| Fluoride | 21.770 | 12.440 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | 2.592 | 1.203 |
| Zinc | 9.442 | 3.888 |
| Ammonia (as N) | 1,233.000 | 542.5000 |
| Fluoride | 324.000 | 185.100 |
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Code of Federal Regulations
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| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | .069 | .032 |
| Zinc | .251 | .103 |
| Ammonia (as N) | 32.790 | 14.420 |
| Fluoride | 8.610 | 4.920 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | 3.833 | 1.780 |
| Zinc | 13.960 | 5.750 |
| Ammonia (as N) | 1,825.000 | 802.200 |
| Fluoride | 479.100 | 273.800 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate digested | ||
| Lead | 1.778 | .826 |
| Zinc | 6.478 | 2.668 |
| Ammonia (as N) | 846.600 | 372.200 |
| Fluoride | 222.300 | 127.000 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tantalum salt dried | ||
| Lead | 16.950 | 7.871 |
| Zinc | 61.750 | 25.430 |
| Ammonia (as N) | 8,070.000 | 3,548.000 |
| Fluoride | 2,119.000 | 1,211.000 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of columbium-tantalum oxide dried | ||
| Lead | 1.076 | .500 |
| Zinc | 3.919 | 1.614 |
| Ammonia (as N) | 512.200 | 225.200 |
| Fluoride | 134.500 | 76.840 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tantalum salt reduced | ||
| Lead | 46.500 | 21.590 |
| Zinc | 169.400 | 69.750 |
| Ammonia (as N) | 22,140.000 | 9,732.000 |
| Fluoride | 5,813.000 | 3,322.000 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tantalum salt reduced | ||
| Lead | .572 | .266 |
| Zinc | 2.084 | .858 |
| Ammonia (as N) | 272.400 | 119.700 |
| Fluoride | 71.510 | 40.860 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tantalum powder washed | ||
| Lead | 5.721 | 2.656 |
| Zinc | 20.840 | 8.582 |
| Ammonia (as N) | 2,724.000 | 1,198.000 |
| Fluoride | 715.200 | 408.700 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of columbium or tantalum cast or consolidated | ||
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
| Ammonia (as N) | .000 | .000 |
| Fluoride | .000 | .000 |
[49 FR 8817, Mar. 8, 1984, as amended at 50 FR 12253, Mar. 28, 1985]
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