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§ 421.264 Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Furnace wet air pollution control.
NSPS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of precious metals, including silver, incinerated or smelted | ||
Copper | 5.760 | 2.745 |
Cyanide (total) | 0.900 | 0.360 |
Zinc | 4.590 | 1.890 |
Combined metals | 1.350 | |
Ammonia (as N) | 599.900 | 263.700 |
Total suspended solids | 67.500 | 54.000 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(b) Raw material granulation.
NSPS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of precious metals in the granulated raw material | ||
Copper | 0.819 | 0.390 |
Cyanide (total) | 0.128 | 0.051 |
Zinc | 0.653 | 0.269 |
Combined metals | 0.192 | |
Ammonia (as N) | 85.310 | 37.500 |
Total suspended solids | 9.600 | 7.680 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(c) Spent plating solutions.
NSPS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/liter of spent plating solution used as a raw material | ||
Copper | 1.280 | 0.610 |
Cyanide (total) | 0.200 | 0.080 |
Zinc | 1.020 | 0.420 |
Combined metals | 0.300 | |
Ammonia (as N) | 133.300 | 58.600 |
Total suspended solids | 15.000 | 12.000 |
pH | ( 1) | ( 1) |