40 CFR § 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) |
1 Within the range of 7.5 to 10.0 at all times.
(d) Spent cyanide stripping solutions.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(e) Refinery wet air pollution control 2.
2 This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.
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, produced in refinery | ||
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) |
1 Within the range of 7.5 to 10.0 at all times.
(f) Gold solvent extraction raffinate and wash water.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(g) Gold spent electrolyte.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(h) Gold precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(i) Platinum precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(j) Palladium precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.00 at all times.
(k) Other platinum group metals precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of other platinum group metals precipitated | ||
Copper | 6.656 | 3.172 |
Cyanide (total) | 1.040 | 0.416 |
Zinc | 5.304 | 2.184 |
Combined metals | 1.560 | |
Ammonia (as N) | 693.200 | 304.700 |
Total suspended solids | 78.000 | 62.400 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(l) Spent solution from PGC salt production.
NSPS for the Secondary Precious Metals Subcategory
1 Within the range of 7.5 to 10.0 at all times.
(m) Equipment and floor wash.
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, produced in refinery | ||
Copper | 0.000 | 0.000 |
Cyanide (total) | 0.000 | 0.000 |
Zinc | 0.000 | 0.000 |
Combined metals | 0.000 | |
Ammonia (as N) | 0.000 | 0.000 |
Total suspended solids | 0.000 | 0.000 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(n) Preliminary treatment.
NSPS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of total precious metals produced through this operation | ||
Copper | 64.000 | 30.500 |
Cyanide (Total) | 10.000 | 4.000 |
Zinc | 51.000 | 21.000 |
Combined metals | 15.000 | |
Ammonia (as N) | 6665.000 | 2930.000 |
Total Suspended Solids | 750.000 | 600.000 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.