Standards of performance for new sources.

§ 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
Copper5.7602.745
Cyanide (total)0.9000.360
Zinc4.5901.890
Combined metals1.350
Ammonia (as N)599.900263.700
Total suspended solids67.50054.000
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
Copper0.8190.390
Cyanide (total)0.1280.051
Zinc0.6530.269
Combined metals0.192
Ammonia (as N)85.31037.500
Total suspended solids9.6007.680
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
Copper1.2800.610
Cyanide (total)0.2000.080
Zinc1.0200.420
Combined metals0.300
Ammonia (as N)133.30058.600
Total suspended solids15.00012.000
pH( 1)( 1)
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