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

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of gold produced by cyanide stripping

Copper 4.736 2.257

Cyanide (total) 0.740 0.296

Zinc 3.774 1.554

Combined metals 1.11

Ammonia (as N) 493.200 216.800

Total suspended solids 55.500 44.400

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Refinery wet air pollution control 2.

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

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of gold produced by solvent extraction

Copper 0.806 0.384

Cyanide (total) 0.126 0.050

Zinc 0.643 0.265

Combined metals 0.189

Ammonia (as N) 83.980 36.920

Total suspended solids 9.450 7.560

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Gold spent electrolyte.

NSPS for the Secondary Precious Metals Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of gold produced by electrolysis

Copper 0.011 0.005

Cyanide (total) 0.002 0.001

Combined metals 0.003

Zinc 0.009 0.004

Ammonia (as N) 1.160 0.510

Total suspended solids 0.131 0.104

pH (1) (1)

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

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of gold precipitated

Copper 5.632 2.684

Cyanide (total) 0.880 0.352

Zinc 4.488 1.848

Combined metals 1.320

Ammonia (as N) 586.500 257.800

Total suspended solids 66.00 52.800

pH (1) (1)

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

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of platinum 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.

(j) Palladium 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 palladium precipitated

Copper 7.680 3.660

Cyanide (total) 1.200 0.480

Zinc 6.1200 2.520

Combined metals 1.800

Ammonia (as N) 799.800 351.600

Total suspended solids 90.000 72.000

pH (1) (1)

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

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/troy ounce of gold contained in PGC product

Copper 1.152 0.549

Cyanide (total) 0.180 0.072

Zinc 0.918 0.378

Combined metals 0.270

Ammonia (as N) 120.000 52.740

Total suspended solids 13.500 10.800

pH (1) (1)

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.