40 CFR 421.124: Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Subpart L—Film Stripping.

NSPS

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

mg/troy ounce of silver from film stripping

Copper 64.450 30.720

Zinc 51.360 21.150

Ammonia (as N) 6,712.000 2,951.000

Total suspended solids 755.300 604.200

pH (1) (1)

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

(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.

NSPS

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

mg/troy ounce of silver from precipitation and filtration of film stripping solutions

Copper 1.242 .592

Zinc .990 .408

Ammonia (as N) 129.300 56.840

Total suspended solids 14.550 11.640

pH (1) (1)

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

(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.

NSPS

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

mg/troy ounce of silver precipitated

Copper 73.690 35.120

Zinc 58.720 24.180

Ammonia (as N) 7,674.000 3,374.000

Total suspended solids 863.600 690.900

pH (1) (1)

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

(d) Subpart L—Precipitation and Filtration of Photographic Solutions.

NSPS

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

mg/troy ounce of silver precipitated

Copper 34.048 16.226

Zinc 27.132 11.172

Ammonia (as N) 3,545.000 1,559.000

Total suspended solids 399.000 319.200

pH (1) (1)

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

(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.

NSPS

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

mg/troy ounce of silver from precipitation and filtration of photographic solutions

Copper 15.540 7.406

Zinc 12.380 5.099

Ammonia (as N) 1,618.000 711.400

Total suspended solids 182.100 145.700

pH (1) (1)

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

(f) Subpart L—Electrolytic Refining.

NSPS

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

mg/troy ounce of silver from electrolytic refining

Copper .973 .464

Zinc .775 .319

Ammonia (as N) 101.300 44.540

Total suspended solids 11.400 9.120

pH (1) (1)

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

(g) Subpart L—Furnace Wet Air Pollution Control.

NSPS

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

mg/troy ounce of silver roasted, smelted, or dried

Copper .000 .000

Zinc .000 .000

Ammonia (as N) .000 .000

Total suspended solids .000 .000

pH (1) (1)

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

(h) Subpart L—Leaching.

NSPS

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

mg/troy ounce of silver produced from leaching

Copper .110 .053

Zinc .088 .036

Ammonia (as N) 11.470 5.040

Total suspended solids 1.290 1.032

pH (1) (1)

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

(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.

NSPS

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

mg/troy ounce of silver produced from leaching or silver precipitated

Copper 5.671 2.703

Zinc 4.519 1.861

Ammonia (as N) 590.500 259.600

Total suspended solids 66.450 53.160

pH (1) (1)

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

(j) Subpart L—Precipitation and Filtration of Nonphotograhic Solutions.

NSPS

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

mg/troy ounce of silver precipitated

Copper 3.930 1.873

Zinc 3.132 1.290

Ammonia (as N) 409.300 179.900

Total suspended solids 46.050 36.840

pH (1) (1)

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

(k) Subpart L—Floor and Equipment Washdown.

NSPS

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

mg/troy ounce of silver production

Copper .000 .000

Zinc .000 .000

Ammonia (as N) .000 .000

Total suspended solids .000 .000

pH (1) (1)

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