§ 421.332 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:
(a) Sand drying wet air pollution control.
BPT Limitations for the Primary Zirconium and Hafnium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced | ||
| Chromium (total) | 0.250 | 0.102 |
| Cyanide (total) | 0.165 | 0.068 |
| Lead | 0.239 | 0.114 |
| Nickel | 1.091 | 0.721 |
| Ammonia (as N) | 75.710 | 33.280 |
| Total suspended solids | 23.290 | 11.080 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(b) Sand chlorination off-gas wet air pollution control.
BPT Limitations for the Primary Zirconium and Hafnium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zironium dioxide and hafnium dioxide produced | ||
| Chromium (total) | 19.130 | 7.825 |
| Cyanide (total) | 12.610 | 5.216 |
| Lead | 18.260 | 8.694 |
| Nickel | 83.460 | 55.210 |
| Ammonia (as N) | 5,795.000 | 2,547.000 |
| Total suspended solids | 1,782.000 | 847.700 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(c) Sand chlorination area-vent wet air pollution control.
BPT Limitations for the Primary Zirconium and Hafnium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced | ||
| Chromium (total) | 3.751 | 1.534 |
| Cyanide (total) | 2.472 | 1.023 |
| Lead | 3.580 | 1.705 |
| Nickel | 16.370 | 10.830 |
| Ammonia (as N) | 1,136.000 | 449.500 |
| Total suspended solids | 349.500 | 166.200 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(d) SiCl4 purification wet air pollution control.
BPT Limitations for the Primary Zirconium and Hafnium Subcategory